Merge branch 'develop'

68 files changed, 3783 insertions, 0 deletions

diff --git a/app/models/.gitkeep b/app/models/.gitkeep
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/app/models/.gitkeep
diff --git a/app/models/ability.rb b/app/models/ability.rb
new file mode 100644
index 0000000..d9ec74a
--- /dev/null
+++ b/app/models/ability.rb
@@ -0,0 +1,170 @@
+class Ability
+  include CanCan::Ability
+  
+  def initialize( user )
+    # See the wiki for details: https://github.com/ryanb/cancan/wiki/Defining-Abilities
+    if user && user.current_tenant != nil
+      if GemeinschaftSetup.count == 1 && Tenant.count == 1 && User.count == 1 && UserGroup.count == 1
+        # This is a new installation with a Master-Tenant and a Super-Admin.
+        #
+        can [:read, :create], Tenant
+      else
+        tenant = user.current_tenant
+
+        if user.current_tenant.user_groups.where(:name => 'Admins').first \
+          && user.current_tenant.user_groups.where(:name => 'Admins').first.users.include?(user)
+          # ADMIN ABILITIES
+          # With great power comes great responsibility!
+          #
+          can :manage, :all
+
+          # Manufacturers and PhoneModels can not be changed
+          #
+          cannot [:create, :destroy, :edit, :update], Manufacturer
+          cannot [:create, :destroy, :edit, :update], PhoneModel
+
+          # Super-Tenant can not be destroyed or edited
+          #
+          cannot [:create, :destroy, :edit, :update], Tenant, :id => 1
+
+          cannot :manage, PhoneBook
+
+          # Phonebooks and PhoneBookEntries
+          #
+          can :manage, PhoneBook, :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id
+          can :manage, PhoneBookEntry, :phone_book => { :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id }
+
+          can :manage, PhoneBook, :phone_bookable_type => 'UserGroup', :phone_bookable_id => tenant.user_group_ids
+          tenant.user_groups.each do |user_group|
+            can :manage, PhoneBookEntry, :phone_book => { :id => user_group.phone_book_ids }
+          end
+
+          # Personal Phonebooks and PhoneBookEntries
+          #
+          can :manage, PhoneBook, :phone_bookable_type => 'User', :phone_bookable_id => user.id
+          can :manage, PhoneBookEntry, :phone_book => { :phone_bookable_type => 'User', :phone_bookable_id => user.id }
+
+          can :read, PhoneBook, :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id
+          can :read, PhoneBookEntry, :phone_book => { :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id }
+
+          can :read, PhoneBook, :phone_bookable_type => 'UserGroup', :phone_bookable_id => user.user_group_ids
+          user.user_groups.each do |user_group|
+            can :read, PhoneBookEntry, :phone_book => { :id => user_group.phone_book_ids }
+          end
+
+          # SystemMessages
+          #
+          cannot [:destroy, :edit, :update], SystemMessage
+
+          # A FacDocument can't be changed
+          #
+          cannot [:edit, :update], FaxDocument
+
+          # Can manage GsNodes
+          #
+          can :manage, GsNode
+
+          # Can't phones/1/phone_sip_accounts/1/edit
+          #
+          cannot :edit, PhoneSipAccount
+
+          # Dirty hack to disable PhoneNumberRange in the GUI
+          #
+          if STRICT_INTERNAL_EXTENSION_HANDLING == false
+            cannot :manage, PhoneNumberRange
+          end
+        else
+          # Any user can do the following stuff.
+          #
+
+          # Own Tenant and own User
+          #
+          can :read, Tenant, :id => user.current_tenant.id
+          can [ :read, :edit, :update ], User, :id => user.id
+
+          # Destroy his own avatar
+          #
+          can :destroy_avatar, User, :id => user.id
+
+          # Phonebooks and PhoneBookEntries
+          #
+          cannot :manage, PhoneBook
+
+          can :manage, PhoneBook, :phone_bookable_type => 'User', :phone_bookable_id => user.id
+          can :manage, PhoneBookEntry, :phone_book => { :phone_bookable_type => 'User', :phone_bookable_id => user.id }
+          can :manage, PhoneNumber, :phone_numberable_type => 'PhoneBookEntry', :phone_numberable_id => user.phone_books.map{ |phone_book| phone_book.phone_book_entry_ids}.flatten
+
+          can :read, PhoneBook, :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id
+          can :read, PhoneBookEntry, :phone_book => { :phone_bookable_type => 'Tenant', :phone_bookable_id => tenant.id }
+
+          can :read, PhoneBook, :phone_bookable_type => 'UserGroup', :phone_bookable_id => user.user_group_ids
+          user.user_groups.each do |user_group|
+            can :read, PhoneBookEntry, :phone_book => { :id => user_group.phone_book_ids }
+          end
+
+          # UserGroups
+          #
+          can :read, UserGroupMembership, :user_id => user.id
+          can :read, UserGroup, :users => { :user_group_memberships => { :user_id => user.id }}
+
+          # SipAccounts and Phones
+          #
+          can :read, SipAccount, :sip_accountable_type => 'User', :sip_accountable_id => user.id
+          user.sip_accounts.each do |sip_account|
+            can :read, PhoneNumber, :id => sip_account.phone_number_ids
+            can :manage, CallForward, :phone_number_id => sip_account.phone_number_ids
+            can :manage, Ringtone, :ringtoneable_type => 'PhoneNumber', :ringtoneable_id => sip_account.phone_number_ids
+            can [:read, :destroy, :call] , CallHistory, :id => sip_account.call_history_ids
+          end
+          can :read, Phone, :phoneable_type => 'User', :phoneable_id => user.id
+
+          # Softkeys
+          #
+          can :manage, Softkey, :sip_account => { :id => user.sip_account_ids }
+
+          # Fax
+          #
+          can :read, FaxAccount, :fax_accountable_type => 'User', :fax_accountable_id => user.id
+          user.fax_accounts.each do |fax_account|
+            can :read, PhoneNumber, :id => fax_account.phone_number_ids
+            can [:read, :create, :delete], FaxDocument, :fax_account_id => fax_account.id
+          end 
+
+          # Conferences
+          #
+          can [ :read, :edit, :update, :destroy ], Conference, :id => user.conference_ids
+          user.conferences.each do |conference|
+            can :read, PhoneNumber, :id => conference.phone_number_ids
+            can :manage, ConferenceInvitee, :conference_id => conference.id
+          end
+
+          # User can manage CallForwards of the PhoneNumbers of his
+          # own SipAccounts:
+          #
+          can :manage, CallForward, :phone_number_id => user.phone_number_ids
+
+          # SystemMessages
+          #
+          can :read, SystemMessage, :user_id => user.id
+
+          # SoftkeyFunctions
+          #
+          can :read, SoftkeyFunction
+
+          # Voicemail
+          #
+          can :manage, VoicemailMessage
+          can :manage, VoicemailSetting
+        end
+      end
+    else
+      if GemeinschaftSetup.count == 0 && Tenant.count == 0 && User.count == 0
+        # This is a fresh system.
+        #
+        can :create, GemeinschaftSetup
+        can :manage, SipDomain
+      end
+    end
+
+  end
+end
diff --git a/app/models/access_authorization.rb b/app/models/access_authorization.rb
new file mode 100644
index 0000000..ef33115
--- /dev/null
+++ b/app/models/access_authorization.rb
@@ -0,0 +1,41 @@
+class AccessAuthorization < ActiveRecord::Base
+  attr_accessible :name, :login, :pin, :phone_numbers_attributes, :sip_account_id
+
+  belongs_to :access_authorizationable, :polymorphic => true
+
+  validates_uniqueness_of :name, :scope => [ :access_authorizationable_type, :access_authorizationable_id ],
+                                 :allow_nil => true, :allow_blank => true
+
+  # The login is optional. But if set has to be done with digits only.
+  #
+  validates_format_of :login, :with => /\A([0-9]+)\Z/, 
+                      :allow_nil => true, :allow_blank => true,
+                      :message => "must be numeric."
+
+  # The PIN is optional. But when set it has to be a proper PIN.
+  #
+  validates_format_of :pin, :with => /\A([0-9]+)\Z/, 
+                      :allow_nil => true, :allow_blank => true,
+                      :message => "must be numeric."
+
+  validates_length_of :pin, :minimum => MINIMUM_PIN_LENGTH, :maximum => MAXIMUM_PIN_LENGTH,
+                      :allow_nil => true, :allow_blank => true
+
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  # Optional SIP account.
+  #
+  belongs_to :sip_account
+
+  validates_presence_of :sip_account, :if => Proc.new{ |access_authorization| !access_authorization.sip_account_id.blank? }, 
+                        :message => 'Given SIP account does not exist.'
+
+  acts_as_list :scope => [ :access_authorizationable_type, :access_authorizationable_id ]
+
+  def to_s
+    self.name || I18n.t('access_authorizations.name') + ' ID ' + self.id.to_s
+  end
+end
diff --git a/app/models/acd_agent.rb b/app/models/acd_agent.rb
new file mode 100644
index 0000000..a00ac4b
--- /dev/null
+++ b/app/models/acd_agent.rb
@@ -0,0 +1,39 @@
+class AcdAgent < ActiveRecord::Base
+  DESTINATION_TYPES = ['SipAccount']
+  STATUSES = ['active', 'inactive']
+  
+  attr_accessible :uuid, :name, :status, :automatic_call_distributor_id, :last_call, :calls_answered, :destination_type, :destination_id
+  
+  belongs_to :automatic_call_distributor
+  
+  belongs_to :destination, :polymorphic => true
+
+  after_save :set_presence
+
+  def to_s
+    self.name || I18n.t('acd_agents.name') + ' ID ' + self.id.to_s
+  end
+
+  private
+  def set_presence
+    dialplan_function = nil
+    
+    state = 'early'
+    if self.status == 'active'
+      state = 'confirmed'
+    elsif self.status == 'inactive'
+      state = 'terminated'
+    end
+      
+    require 'freeswitch_event'
+    event = FreeswitchEvent.new("PRESENCE_IN")
+    event.add_header("proto", "sip")
+    event.add_header("from", "f-acdmtg-#{self.id}@#{SipDomain.first.host}")
+    event.add_header("event_type", "presence")
+    event.add_header("alt_event_type", "dialog")
+    event.add_header("presence-call-direction", "outbound")
+    event.add_header("answer-state",  state)
+    event.add_header("unique-id", "acd_agent_#{self.id}")
+    return event.fire()
+  end
+end
diff --git a/app/models/acd_caller.rb b/app/models/acd_caller.rb
new file mode 100644
index 0000000..1be48b9
--- /dev/null
+++ b/app/models/acd_caller.rb
@@ -0,0 +1,6 @@
+class AcdCaller < ActiveRecord::Base
+  attr_accessible :channel_uuid, :automatic_call_distributor_id, :status, :enter_time, :agent_answer_time, :callback_number, :callback_attempts
+
+  has_one :channel, :class_name => 'FreeswitchChannel', :foreign_key => 'uuid', :primary_key => 'channel_uuid'
+  belongs_to :automatic_call_distributor
+end
diff --git a/app/models/address.rb b/app/models/address.rb
new file mode 100644
index 0000000..bcf3474
--- /dev/null
+++ b/app/models/address.rb
@@ -0,0 +1,8 @@
+class Address < ActiveRecord::Base
+  attr_accessible :phone_book_entry_id, :line1, :line2, :street, :zip_code, :city, :country_id, :position, :uuid
+
+  belongs_to :country
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+end
diff --git a/app/models/api.rb b/app/models/api.rb
new file mode 100644
index 0000000..557d875
--- /dev/null
+++ b/app/models/api.rb
@@ -0,0 +1,5 @@
+module Api
+  def self.table_name_prefix
+    'api_'
+  end
+end
diff --git a/app/models/api/row.rb b/app/models/api/row.rb
new file mode 100644
index 0000000..ac35516
--- /dev/null
+++ b/app/models/api/row.rb
@@ -0,0 +1,152 @@
+class Api::Row < ActiveRecord::Base
+
+  # This is the place to do some basic mapping.
+  #
+  alias_attribute :UserName, :user_name
+  alias_attribute :LastName, :last_name
+  alias_attribute :FirstName, :first_name
+  alias_attribute :PhoneOffice, :office_phone_number
+  alias_attribute :VoipNr, :internal_extension
+  alias_attribute :CellPhone, :mobile_phone_number
+  alias_attribute :Fax, :fax_phone_number
+  alias_attribute :Email, :email
+  alias_attribute :PIN, :pin
+  alias_attribute :PIN_LastUpdate, :pin_updated_at
+  alias_attribute :Photo, :photo_file_name
+
+  belongs_to :user
+
+  # Validations
+  #
+  validates_presence_of :user_name
+  validates_uniqueness_of :user_name
+
+  after_destroy :destroy_user
+
+  def to_s
+    self.user_name
+  end
+
+  def create_a_new_gemeinschaft_user
+    tenant = Tenant.find(DEFAULT_API_TENANT_ID)
+
+    # Find or create the user
+    #
+    if tenant.users.where(:user_name => self.user_name).count > 0
+      user = tenant.users.where(:user_name => self.user_name).first
+    else
+      user = tenant.users.create(
+                                :user_name => self.user_name,
+                                :last_name => self.last_name,
+                                :first_name => self.first_name,
+                                :middle_name => self.middle_name,
+                                :email => self.email,
+                                :new_pin => self.pin,
+                                :new_pin_confirmation => self.pin,
+                                :password => self.pin,
+                                :password_confirmation => self.pin,
+                                :language_id => tenant.language_id,
+                              )
+    end
+
+    self.update_attributes({:user_id => user.id})
+
+    # Find or create a sip_account
+    #
+    if user.sip_accounts.count > 0
+      sip_account = user.sip_accounts.first
+    else
+      sip_account = user.sip_accounts.create(
+                                            :caller_name => self.user.to_s,
+                                            :voicemail_pin => self.pin,
+                                            )
+    end
+
+    # Create phone_numbers to this sip_account (BTW: phone_numbers are unqiue)
+    #
+    sip_account.phone_numbers.create(:number => self.internal_extension)
+    sip_account.phone_numbers.create(:number => self.office_phone_number)
+
+
+    # Find or create a fax account
+    #
+    if user.fax_accounts.count > 0
+      fax_account = user.fax_accounts.first
+    else
+      fax_account = user.fax_accounts.create(
+                                              :name => 'Default Fax',
+                                              :station_id => user.to_s,
+                                              :email => self.email,
+                                              :days_till_auto_delete => 90,
+                                              :retries => 3,
+                                            )
+    end
+
+    # Create phone_numbers to this fax_account
+    #
+    fax_account.phone_numbers.create(:number => self.fax_phone_number)
+
+  end
+
+  def destroy_user
+    self.user.destroy
+  end
+
+  def update_user_data
+    user = self.user
+    user.update_attributes(
+                          :user_name => self.user_name,
+                          :last_name => self.last_name,
+                          :first_name => self.first_name,
+                          :middle_name => self.middle_name,
+                          :email => self.email,
+                          :new_pin => self.pin,
+                          :new_pin_confirmation => self.pin,
+                          :password => self.pin,
+                          :password_confirmation => self.pin,
+                          )
+
+    # Find or create a sip_account
+    #
+    if user.sip_accounts.count > 0
+      sip_account = user.sip_accounts.first
+    else
+      sip_account = user.sip_accounts.create(
+                                            :caller_name => self.user.to_s,
+                                            :voicemail_pin => self.pin,
+                                            )
+    end
+
+    # Delete old phone_numbers
+    #
+    sip_account.phone_numbers.destroy_all
+
+    # Create phone_numbers to this sip_account (BTW: phone_numbers are unqiue)
+    #
+    sip_account.phone_numbers.create(:number => self.internal_extension)
+    sip_account.phone_numbers.create(:number => self.office_phone_number)
+
+    # Find or create a fax account
+    #
+    if user.fax_accounts.count > 0
+      fax_account = user.fax_accounts.first
+    else
+      fax_account = user.fax_accounts.create(
+                                              :name => 'Default Fax',
+                                              :station_id => user.to_s,
+                                              :email => self.email,
+                                              :days_till_auto_delete => 90,
+                                              :retries => 3,
+                                            )
+    end
+
+    # Delete old phone_number
+    #
+    fax_account.phone_numbers.destroy_all
+
+    # Create phone_numbers to this fax_account
+    #
+    fax_account.phone_numbers.create(:number => self.fax_phone_number)
+  end
+
+end
diff --git a/app/models/area_code.rb b/app/models/area_code.rb
new file mode 100644
index 0000000..6a9d946
--- /dev/null
+++ b/app/models/area_code.rb
@@ -0,0 +1,22 @@
+class AreaCode < ActiveRecord::Base
+  
+  # Associations:
+  #
+  belongs_to :country
+  
+  # Validations:
+  #
+  validates_presence_of :country
+  validates_presence_of :name
+  validates_presence_of :area_code
+  
+  validates_uniqueness_of :area_code, :scope => [ :country_id, :central_office_code ]
+  
+  
+  def to_s
+    "#{self.name} (#{self.area_code}" +
+      (self.central_office_code.blank? ? '' : "-#{self.central_office_code}") +
+      ')'
+  end
+  
+end
diff --git a/app/models/automatic_call_distributor.rb b/app/models/automatic_call_distributor.rb
new file mode 100644
index 0000000..678e0eb
--- /dev/null
+++ b/app/models/automatic_call_distributor.rb
@@ -0,0 +1,21 @@
+class AutomaticCallDistributor < ActiveRecord::Base
+  attr_accessible :uuid, :name, :strategy, :automatic_call_distributorable_type, :automatic_call_distributorable_id, :max_callers, :agent_timeout, :retry_timeout, :join, :leave, :gs_node_id, :announce_position, :announce_call_agents, :greeting, :goodbye, :music
+
+  belongs_to :automatic_call_distributorable, :polymorphic => true
+
+  has_many :acd_agents, :dependent => :destroy
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  validates_presence_of :strategy
+
+  STRATEGIES  = ['ring_all', 'round_robin']
+  JOIN_ON = ['agents_available', 'agents_active', 'always']
+  LEAVE_ON = ['no_agents_available_timeout', 'no_agents_active_timeout', 'no_agents_available', 'no_agents_active', 'timeout', 'never']
+
+  def to_s
+    self.name
+  end
+end
diff --git a/app/models/call.rb b/app/models/call.rb
new file mode 100644
index 0000000..57961ec
--- /dev/null
+++ b/app/models/call.rb
@@ -0,0 +1,36 @@
+class Call < ActiveRecord::Base
+  self.table_name = 'channels'
+  self.primary_key = 'uuid'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  def sip_account
+    auth_name = self.name.match('^.+[/:](.+)@.+$')
+    if auth_name && ! auth_name[1].blank?
+      return SipAccount.where(:auth_name => auth_name[1]).first
+    end
+  end
+
+  def kill
+    require 'freeswitch_event'
+    return FreeswitchAPI.execute('uuid_kill', self.uuid, true);
+  end
+end
diff --git a/app/models/call_forward.rb b/app/models/call_forward.rb
new file mode 100644
index 0000000..0018cfb
--- /dev/null
+++ b/app/models/call_forward.rb
@@ -0,0 +1,262 @@
+class CallForward < ActiveRecord::Base
+
+  attr_accessor :to_voicemail, :hunt_group_id
+
+  attr_accessible :phone_number_id, :call_forward_case_id, :timeout, 
+                  :destination, :source, :depth, :active, :to_voicemail,
+                  :hunt_group_id,
+                  :call_forwardable_type, :call_forwardable_id,
+                  :call_forwarding_destination, :position, :uuid
+  
+  belongs_to :phone_number
+  belongs_to :call_forwardable, :polymorphic => true
+  has_many :softkeys
+  
+  acts_as_list :scope => [ :phone_number_id, :call_forward_case_id ]
+
+  validates_presence_of :phone_number
+  validates_presence_of :call_forward_case_id
+  validates_presence_of :destination, :if => Proc.new { |cf| cf.call_forwardable_type.to_s.downcase == 'phonenumber' || cf.call_forwardable_type.blank?  }
+
+  validates_inclusion_of :destination,
+    :in => [ nil, '' ],
+    :if => Proc.new { |cf| cf.to_voicemail == true }
+  
+  belongs_to :call_forward_case
+
+  validates_presence_of      :depth
+  validates_numericality_of  :depth,
+    :only_integer => true,
+    :greater_than_or_equal_to  =>   1,
+    :less_than_or_equal_to     =>  MAX_CALL_FORWARD_DEPTH
+  
+  before_validation {
+    self.timeout = nil if self.call_forward_case_id != 3
+  }
+
+  validates_numericality_of :timeout,
+    :if => Proc.new { |cf| cf.call_forward_case_id == 3 },
+    :only_integer => true,
+    :greater_than_or_equal_to  =>   1,
+    :less_than_or_equal_to     => 120
+  
+  validates_inclusion_of :timeout,
+    :in => [ nil ],
+    :if => Proc.new { |cf| cf.call_forward_case_id != 3 }
+
+  validate :validate_empty_hunt_group, :if => Proc.new { |cf| cf.active == true && cf.call_forwardable_type == 'HuntGroup' && cf.call_forward_case.value == 'assistant' }
+  
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  # Make sure the call forward's parent can't be changed:
+  before_validation { |cfwd|
+    if cfwd.id \
+    && cfwd.phone_number_id != cfwd.phone_number_id_was
+      errors.add( :phone_number_id, "cannot be changed." )
+    end
+  }
+
+  #before_validation :set_call_forwardable
+  before_save :split_and_format_destination_numbers
+  after_save :set_presence
+  after_save :work_through_callforward_rules_act_per_sip_account
+  after_save :deactivate_concurring_entries, :if => Proc.new { |cf| cf.active == true }
+  before_destroy :check_if_other_callforward_rules_have_to_be_destroyed
+  before_destroy :deactivate_connected_softkeys
+
+  def case_string
+    return self.call_forward_case ? self.call_forward_case.value : nil
+  end
+
+  def to_s
+    if self.call_forwardable_type.blank?
+      self.call_forwardable_type = ''
+    else
+      call_forwardable_type = " #{self.call_forwardable_type}"
+    end
+    if self.call_forwardable
+      destination = "#{self.call_forwardable}#{call_forwardable_type}"
+    else
+      destination = "#{self.destination}#{call_forwardable_type}"
+    end
+    "#{self.phone_number} (#{I18n.t("call_forward_cases.#{self.call_forward_case}")}) -> #{destination}"
+  end
+
+  def set_this_callforward_rule_to_all_phone_numbers_of_the_parent_sip_account
+    # This is to make sure that no recursion kicks in.
+    #
+    if ! self.phone_number.phone_numberable.respond_to? :callforward_rules_act_per_sip_account
+      return false
+    end
+
+    old_value_of_callforward_rules_act_per_sip_account = self.phone_number.phone_numberable.callforward_rules_act_per_sip_account
+    self.phone_number.phone_numberable.update_attributes({:callforward_rules_act_per_sip_account => false})
+
+    attributes_of_this_call_forward = self.attributes.delete_if {|key, value| ['id','updated_at','created_at','phone_number_id','call_forward_case_id', 'uuid'].include?(key)}
+    phone_numbers = self.phone_number.phone_numberable.phone_numbers.where('id != ?', self.phone_number.id)
+
+    phone_numbers.each do |phone_number|
+      # Problem
+      call_forward = phone_number.call_forwards.find_or_create_by_call_forward_case_id_and_position(self.call_forward_case_id, self.position, attributes_of_this_call_forward)
+      call_forward.update_attributes(attributes_of_this_call_forward)
+    end
+
+    self.phone_number.phone_numberable.update_attributes({:callforward_rules_act_per_sip_account => old_value_of_callforward_rules_act_per_sip_account})
+  end
+
+  def destroy_all_similar_callforward_rules_of_the_parent_sip_account
+    # This is to make sure that no recursion kicks in.
+    #
+    if ! self.phone_number.phone_numberable.respond_to? :callforward_rules_act_per_sip_account
+      return false
+    end
+
+    old_value_of_callforward_rules_act_per_sip_account = self.phone_number.phone_numberable.callforward_rules_act_per_sip_account
+    self.phone_number.phone_numberable.update_attributes({:callforward_rules_act_per_sip_account => false})
+
+    phone_numbers_of_parent_sip_account = self.phone_number.phone_numberable.phone_numbers.where('id != ?', self.phone_number.id)
+
+    phone_numbers_of_parent_sip_account.each do |phone_number|
+      if self.call_forwardable_type != 'Voicemail'
+        phone_number.call_forwards.where(:call_forward_case_id => self.call_forward_case_id, :destination => self.destination).destroy_all
+      else
+        phone_number.call_forwards.where(:call_forward_case_id => self.call_forward_case_id, :call_forwardable_type => self.call_forwardable_type).destroy_all
+      end
+    end
+
+    self.phone_number.phone_numberable.update_attributes({:callforward_rules_act_per_sip_account => old_value_of_callforward_rules_act_per_sip_account})
+  end
+
+  def call_forwarding_destination
+    "#{self.call_forwardable_id}:#{self.call_forwardable_type}"
+  end
+
+  def call_forwarding_destination=(destination_record)
+    self.call_forwardable_id, delimeter, self.call_forwardable_type = destination_record.to_s.partition(':')
+  end
+
+  def toggle
+    self.active = ! self.active
+    return self.save
+  end
+
+  def deactivate_connected_softkeys
+    softkey_function_deactivated = SoftkeyFunction.find_by_name('deactivated')
+    self.softkeys.each do |softkey|
+      if softkey.softkey_function_id != softkey_function_deactivated.id
+        softkey.update_attributes(:call_forward_id => nil, :softkey_function_id => softkey_function_deactivated.id)
+      end
+    end
+  end
+
+  private
+  def split_and_format_destination_numbers
+    if !self.destination.blank?
+      destinations = self.destination.gsub(/[^+0-9\,]/,'').gsub(/[\,]+/,',').split(/\,/).delete_if{|x| x.blank?}
+      self.destination = nil
+      if destinations.count > 0
+        destinations.each do |single_destination|
+          self.destination = self.destination.to_s + ", #{PhoneNumber.parse_and_format(single_destination)}"
+        end
+      end
+      self.destination = self.destination.to_s.gsub(/[^+0-9\,]/,'').gsub(/[\,]+/,',').split(/\,/).sort.delete_if{|x| x.blank?}.join(', ')
+    end
+  end
+
+  def set_presence
+    state = 'terminated'
+
+    if self.active
+      if self.call_forwardable_type and self.call_forwardable_type.downcase() == 'voicemail'
+        state = 'early'
+      else
+        state = 'confirmed'
+      end
+    end
+
+    return send_presence_event(state)
+
+    #if self.call_forward_case_id_changed?
+    #  call_forwarding_service = CallForwardCase.where(:id => self.call_forward_case_id_was).first
+    #  if call_forwarding_service
+    #    send_presence_event(call_forwarding_service.value, state)
+    #  end
+    #end
+
+    #return send_presence_event(self.call_forward_case.value, state)
+  end
+
+  def set_call_forwardable
+    if @hunt_group_id && HuntGroup.where(:id => @hunt_group_id.to_i).count > 0
+      self.call_forwardable = HuntGroup.where(:id => @hunt_group_id.to_i).first
+    end
+
+    if @to_voicemail && @to_voicemail.first.downcase == 'true'
+      self.call_forwardable_type = 'Voicemail'
+      self.call_forwardable_id = nil
+    end 
+  end
+
+  def work_through_callforward_rules_act_per_sip_account
+    if ! self.phone_number.phone_numberable.respond_to? :callforward_rules_act_per_sip_account
+      return false
+    end
+
+    if self.phone_number.phone_numberable.callforward_rules_act_per_sip_account == true
+      self.set_this_callforward_rule_to_all_phone_numbers_of_the_parent_sip_account
+    end
+  end
+
+  def check_if_other_callforward_rules_have_to_be_destroyed
+    if ! self.phone_number.phone_numberable.respond_to? :callforward_rules_act_per_sip_account
+      return false
+    end
+
+    if self.phone_number.phone_numberable.callforward_rules_act_per_sip_account == true
+      self.destroy_all_similar_callforward_rules_of_the_parent_sip_account
+    end
+  end
+
+  def send_presence_event(state, call_forwarding_service = nil)
+    dialplan_function = "cftg-#{self.id}"
+    unique_id = "call_forwarding_#{self.id}"
+
+    if call_forwarding_service == 'always'
+      dialplan_function = "cfutg-#{self.phone_number.id}"
+      unique_id = "call_forwarding_number_#{self.phone_number.id}"
+    elsif call_forwarding_service == 'assistant'
+      dialplan_function = "cfatg-#{self.phone_number.id}"
+      unique_id = "call_forwarding_number_#{self.phone_number.id}"
+    end
+
+    if dialplan_function
+      require 'freeswitch_event'
+      event = FreeswitchEvent.new("PRESENCE_IN")
+      event.add_header("proto", "sip")
+      event.add_header("from", "f-#{dialplan_function}@#{SipDomain.first.host}")
+      event.add_header("event_type", "presence")
+      event.add_header("alt_event_type", "dialog")
+      event.add_header("presence-call-direction", "outbound")
+      event.add_header("answer-state",  state)
+      event.add_header("unique-id", unique_id)
+      return event.fire()
+    end   
+  end
+
+  def deactivate_concurring_entries
+    CallForward.where(:phone_number_id => self.phone_number_id, :call_forward_case_id => self.call_forward_case_id, :active => true).each do |call_forwarding_entry|
+      if call_forwarding_entry.id != self.id
+        call_forwarding_entry.update_attributes(:active => false)
+      end
+    end
+  end
+
+  def validate_empty_hunt_group
+    hunt_group = self.call_forwardable
+    if hunt_group && hunt_group.hunt_group_members.where(:active => true).count == 0
+      errors.add(:call_forwarding_destination, 'HuntGroup has no active members')
+    end
+  end
+  
+end
diff --git a/app/models/call_forward_case.rb b/app/models/call_forward_case.rb
new file mode 100644
index 0000000..a0b872b
--- /dev/null
+++ b/app/models/call_forward_case.rb
@@ -0,0 +1,13 @@
+class CallForwardCase < ActiveRecord::Base
+  
+  attr_accessible :value
+  
+  has_many :call_forwards
+  
+  validates_presence_of :value
+  
+  def to_s
+    self.value
+  end
+  
+end
diff --git a/app/models/call_history.rb b/app/models/call_history.rb
new file mode 100644
index 0000000..4db056a
--- /dev/null
+++ b/app/models/call_history.rb
@@ -0,0 +1,199 @@
+class CallHistory < ActiveRecord::Base
+  belongs_to :call_historyable, :polymorphic => true
+  belongs_to :caller_account, :polymorphic => true
+  belongs_to :callee_account, :polymorphic => true
+  belongs_to :auth_account, :polymorphic => true
+  
+  def display_number
+    if self.entry_type == 'dialed'
+      return self.destination_number.to_s
+    else
+      return self.caller_id_number.to_s
+    end
+  end
+
+  def display_name
+    if self.entry_type == 'dialed'
+      begin
+        account = self.callee_account
+      rescue
+        account = nil
+      end
+      name_str = self.callee_id_name
+    else
+      begin
+        account = self.caller_account
+      rescue
+        account = nil
+      end
+      name_str = self.caller_id_name
+    end
+
+    if name_str.blank?
+      if account.class == SipAccount
+        return account.caller_name.to_s
+      elsif account
+        return account.to_s
+      end
+    else
+      return name_str.to_s
+    end
+  end
+
+  def display_auth_account_name
+    begin
+      account = self.auth_account
+    rescue
+      return nil
+    end
+
+    if account.class == SipAccount
+      return account.caller_name.to_s
+    elsif account
+      return account.to_s
+    end
+  end
+
+  def display_image(image_size = :mini, phone_book_entry)
+    if phone_book_entry
+      image = phone_book_entry.image_url(image_size)
+      if ! image.blank?
+        return image
+      end
+    end
+    
+    begin 
+      if self.entry_type == 'dialed'
+        account = self.callee_account
+      else
+        account = self.caller_account
+      end
+    rescue
+      return nil
+    end
+
+    if account.class == SipAccount && account.sip_accountable.class == User
+      return account.sip_accountable.image_url(image_size).to_s
+    end
+  end
+
+  def display_call_date(date_format, date_today_format)
+    if self.start_stamp.strftime('%Y%m%d') == DateTime::now.strftime('%Y%m%d')
+      return self.start_stamp.strftime(date_today_format)
+    end
+    return self.start_stamp.strftime(date_format)
+  end
+
+  def display_duration
+    if self.duration.to_i > 0
+      minutes = (self.duration / 1.minutes).to_i
+      seconds = self.duration - minutes.minutes.seconds
+      return '%i:%02i' % [minutes, seconds]
+    end
+  end
+
+  def phone_book_entry_by_number(number)
+    begin
+      call_historyable = self.call_historyable
+    rescue
+      return nil
+    end
+
+    if ! call_historyable
+      return nil
+    end
+
+    if call_historyable.class == SipAccount
+      owner = call_historyable.sip_accountable
+    end
+
+    if owner.class == User
+      phone_books = owner.phone_books.all
+      phone_books.concat(owner.current_tenant.phone_books.all)
+    elsif owner.class == Tenant
+      phone_books = owner.phone_books.all
+    end
+
+    if ! phone_books
+      return nil
+    end
+
+    phone_books.each do |phone_book|
+      phone_book_entry = phone_book.find_entry_by_number(number)
+      if phone_book_entry
+        return phone_book_entry
+      end
+    end
+
+    return nil
+      
+  end
+
+  def voicemail_message
+    begin 
+      return self.call_historyable.voicemail_messages.where(:forwarded_by => self.caller_channel_uuid).first
+    rescue
+      return nil
+    end
+  end
+
+  def call_historyable_uuid
+    begin
+      return self.call_historyable.uuid
+    rescue
+      return nil
+    end
+  end
+
+  def call_historyable_uuid=(uuid)
+    begin
+      return self.call_historyable_id = self.call_historyable_type.constantize.where(:uuid => uuid).first.id
+    rescue
+    end
+  end
+
+  def caller_account_uuid
+    begin
+      return self.caller_account.uuid
+    rescue
+      return nil
+    end
+  end
+
+  def caller_account_uuid=(uuid)
+    begin
+      return self.caller_account_id = self.caller_account_type.constantize.where(:uuid => uuid).first.id
+    rescue
+    end
+  end
+
+  def callee_account_uuid
+    begin
+      return self.callee_account.uuid
+    rescue
+      return nil
+    end
+  end
+
+  def callee_account_uuid=(uuid)
+    begin
+      return self.callee_account_id = self.callee_account_type.constantize.where(:uuid => uuid).first.id
+    rescue
+    end
+  end
+
+  def auth_account_uuid
+    begin
+      return self.auth_account.uuid
+    rescue
+      return nil
+    end
+  end
+
+  def auth_account_uuid=(uuid)
+    begin
+      return self.auth_account_id = self.auth_account_type.constantize.where(:uuid => uuid).first.id
+    rescue
+    end
+  end
+end
diff --git a/app/models/callthrough.rb b/app/models/callthrough.rb
new file mode 100644
index 0000000..c057fa6
--- /dev/null
+++ b/app/models/callthrough.rb
@@ -0,0 +1,60 @@
+class Callthrough < ActiveRecord::Base
+  attr_accessible :name, :clip_no_screening,
+                  :phone_numbers_attributes, :access_authorizations_attributes,
+                  :whitelists_attributes
+
+  # Validations and Associations
+  #
+  belongs_to :tenant
+
+  validates_presence_of :tenant_id
+  validates_presence_of :tenant
+
+  # These are the phone_numbers for this callthrough.
+  # One has to dial this number to access the callthrough.
+  #
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  validate :requires_at_least_one_phone_number
+
+  # These are the access authorizations for this callthrough.
+  # One has to be known by his phone number or by a login/pin or even both.
+  #
+  has_many :access_authorizations, :as => :access_authorizationable, :dependent => :destroy
+
+  accepts_nested_attributes_for :access_authorizations, 
+                                :reject_if => lambda { |access_authorization| access_authorization[:login].blank? && access_authorization[:pin].blank? && access_authorization[:phone_numbers_attributes]['0'][:number].blank? },
+                                :allow_destroy => true
+
+  has_many :access_authorization_phone_numbers, :source => :phone_numbers, 
+           :through => :access_authorizations, :readonly => true
+
+  # These are the whitelists of the phone numbers which can be called through this callthrough.
+  #
+  has_many :whitelists, :as => :whitelistable, :dependent => :destroy
+
+  accepts_nested_attributes_for :whitelists, 
+                                :reject_if => lambda { |whitelist| whitelist[:phone_numbers_attributes]['0']['number'].blank? }, 
+                                :allow_destroy => true
+
+  has_many :whitelisted_phone_numbers, :source => :phone_numbers, 
+           :through => :whitelists, :readonly => true
+
+  # Delegations:
+  #
+  delegate :sip_domain, :to => :tenant, :allow_nil => true
+
+  def to_s
+    self.name || I18n.t('callthroughs.name') + ' ID ' + self.id
+  end
+
+
+  private
+  def requires_at_least_one_phone_number
+    errors.add(:base, "You must provide at least one phone number") if !self.phone_numbers.map{|phone_number| phone_number.valid?}.include?(true)
+  end
+end
diff --git a/app/models/conference.rb b/app/models/conference.rb
new file mode 100644
index 0000000..8be9f21
--- /dev/null
+++ b/app/models/conference.rb
@@ -0,0 +1,63 @@
+class Conference < ActiveRecord::Base
+  attr_accessible :name, :start, :end, :description, :pin, 
+                  :open_for_anybody, :max_members, :announce_new_member_by_name,
+                  :announce_left_member_by_name
+  
+  belongs_to :conferenceable, :polymorphic => true
+  has_many :conference_invitees, :dependent => :destroy
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+
+  validates_presence_of  :conferenceable_type, :conferenceable_id
+  validates_presence_of  :conferenceable
+  validates_presence_of  :name
+  validates_presence_of  :start, :if => Proc.new { |conference| !conference.end.blank? }
+  validates_presence_of  :end, :if => Proc.new { |conference| !conference.start.blank? }
+  validates_presence_of  :max_members
+  validates_numericality_of :max_members, :only_integer => true, 
+                                          :greater_than => 0,
+                                          :less_than => (MAXIMUM_NUMBER_OF_PEOPLE_IN_A_CONFERENCE + 1),
+                                          :allow_nil => false,
+                                          :allow_blank => false
+
+  validates_inclusion_of :open_for_anybody, :in => [true, false]
+  
+  validates_numericality_of :pin, :only_integer => true, 
+                                  :greater_than => 0,
+                                  :allow_nil => true,
+                                  :allow_blank => true
+  validates_length_of       :pin, :minimum => MINIMUM_PIN_LENGTH,
+                                  :allow_nil => true,
+                                  :allow_blank => true
+  
+  validate :start_and_end_dates_must_make_sense, :if => Proc.new { |conference| !conference.start.blank? && !conference.end.blank? }
+  
+  after_save :send_pin_email_when_pin_has_changed
+
+  default_scope where(:state => 'active').order(:start)
+  
+  # State Machine stuff
+  state_machine :initial => :active do
+  end
+  
+  def sip_domain
+    self.conferenceable.try(:sip_domain)
+  end
+  
+  def to_s
+    name
+  end
+  
+  private
+  
+  def start_and_end_dates_must_make_sense
+    errors.add(:start, 'must be in the future') if self.start < Time.now - 10.minutes
+    errors.add(:end, 'must be later than the start') if self.end < self.start
+  end
+
+  def send_pin_email_when_pin_has_changed
+    if self.conferenceable.class == User && self.pin_changed?
+      Notifications.new_pin(self).deliver
+    end
+  end
+
+end
diff --git a/app/models/conference_invitee.rb b/app/models/conference_invitee.rb
new file mode 100644
index 0000000..7de20de
--- /dev/null
+++ b/app/models/conference_invitee.rb
@@ -0,0 +1,39 @@
+class ConferenceInvitee < ActiveRecord::Base
+  attr_accessible :pin, :speaker, :moderator, :phone_number, :phone_number_attributes
+  
+  belongs_to :conference
+  belongs_to :phone_book_entry
+  has_one :phone_number, :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :phone_number
+  
+  validates_presence_of :conference_id
+  validates_presence_of :conference
+  validates_presence_of :phone_number
+  validates_numericality_of :pin, :only_integer => true, 
+                                  :greater_than => 0,
+                                  :allow_nil => true,
+                                  :allow_blank => true
+  validates_length_of       :pin, :minimum => MINIMUM_PIN_LENGTH,
+                                  :allow_nil => true,
+                                  :allow_blank => true
+                                  
+  validates_inclusion_of :speaker, :in => [true, false]
+  validates_inclusion_of :moderator, :in => [true, false]
+    
+  validate :uniqueness_of_phone_number_in_the_parent_conference
+  validates_uniqueness_of :phone_book_entry_id, :scope => :conference_id, :allow_nil => true
+  
+  def to_s
+    "ID #{self.id}"
+  end
+
+  private
+  
+  def uniqueness_of_phone_number_in_the_parent_conference
+    if self.conference.conference_invitees.where('id != ?', self.id).count > 0 && 
+       self.conference.conference_invitees.where('id != ?', self.id).map{|x| x.phone_number.number}.
+            include?(self.phone_number.number)
+       errors.add(:base, 'Phone number is not unique within the conference.')     
+    end
+  end
+end
diff --git a/app/models/country.rb b/app/models/country.rb
new file mode 100644
index 0000000..018e348
--- /dev/null
+++ b/app/models/country.rb
@@ -0,0 +1,21 @@
+class Country < ActiveRecord::Base
+  
+  has_many :area_codes, :dependent => :destroy
+  has_many :tenants
+  has_many :phone_number_ranges, :as => :phone_number_rangeable, :dependent => :destroy
+  
+  validates_presence_of :name
+  validates_presence_of :country_code
+  validates_presence_of :international_call_prefix
+
+  validates_numericality_of :country_code,
+    :only_integer => true
+  
+  validates_uniqueness_of :name, :scope => [ :country_code ],
+    :case_sensitive => false
+  
+  def to_s
+    self.name
+  end
+  
+end
diff --git a/app/models/dial_in_number_store.rb b/app/models/dial_in_number_store.rb
new file mode 100644
index 0000000..17c2202
--- /dev/null
+++ b/app/models/dial_in_number_store.rb
@@ -0,0 +1,16 @@
+class DialInNumberStore < ActiveRecord::Base
+  # Associations and Validations
+  #
+  validates_presence_of :dial_in_number_storeable_type
+  validates_presence_of :dial_in_number_storeable_id
+
+  belongs_to :dial_in_number_storeable, :polymorphic => true
+
+  validates_presence_of :dial_in_number_storeable
+
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+
+  # Delegations:
+  #
+  delegate :tenant, :to => :dial_in_number_storeable, :allow_nil => true
+end
diff --git a/app/models/fax_account.rb b/app/models/fax_account.rb
new file mode 100644
index 0000000..683447a
--- /dev/null
+++ b/app/models/fax_account.rb
@@ -0,0 +1,77 @@
+# encoding: UTF-8
+
+class FaxAccount < ActiveRecord::Base
+  attr_accessible :name, :email, :station_id, :days_till_auto_delete, :phone_numbers_attributes, :retries
+
+  # Validations:
+  #
+  validates_presence_of :fax_accountable_type, :fax_accountable_id
+  validates_presence_of :fax_accountable
+  validates_presence_of :name
+  validates_presence_of :tenant_id
+  validates_presence_of :tenant
+  
+  validates_numericality_of :days_till_auto_delete, :allow_nil => true
+  validates_numericality_of :retries, :only_integer => true, :greater_than_or_equal_to => 0
+  
+  validates_uniqueness_of :name, :scope => [:fax_accountable_type, :fax_accountable_id]
+    
+  # Associations:
+  #
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  has_many :fax_documents, :dependent => :destroy
+  
+  belongs_to :fax_accountable, :polymorphic => true
+  belongs_to :tenant
+
+  accepts_nested_attributes_for :phone_numbers
+  
+  # Hooks
+  #
+  before_validation :find_and_set_tenant_id
+  before_validation :convert_umlauts
+  
+  def to_s
+    name
+  end
+  
+  private
+  def require_at_least_one_phone_number
+    if self.phone_numbers.count < 1
+      errors.add(:base, 'needs at least one valid phone number')
+    end  
+  end
+  
+  def find_and_set_tenant_id
+      if self.new_record? and self.tenant_id != nil
+        return        
+      else
+        tenant = case self.fax_accountable_type
+      	  when 'UserGroup' ; fax_accountable.tenant
+      	  when 'User'      ; fax_accountable.current_tenant || fax_accountable.tenants.last
+      	  else nil
+      	end
+        self.tenant_id = tenant.id if tenant != nil
+      end
+  end
+
+  def convert_umlauts
+    self.name = self.name.sub(/ä/,'ae').
+                            sub(/Ä/,'Ae').
+                            sub(/ü/,'ue').
+                            sub(/Ü/,'Ue').
+                            sub(/ö/,'oe').
+                            sub(/Ö/,'Oe').
+                            sub(/ß/,'ss')
+    self.name = self.name.gsub(/[^a-zA-Z0-9\-\,\:\.\+ ]/,'_')
+    self.station_id = self.station_id.sub(/ä/,'ae').
+                            sub(/Ä/,'Ae').
+                            sub(/ü/,'ue').
+                            sub(/Ü/,'Ue').
+                            sub(/ö/,'oe').
+                            sub(/Ö/,'Oe').
+                            sub(/ß/,'ss')
+    self.station_id = self.station_id.gsub(/[^a-zA-Z0-9\-\,\:\.\+ ]/,'_')
+  end
+  
+end
diff --git a/app/models/fax_document.rb b/app/models/fax_document.rb
new file mode 100644
index 0000000..67bdea9
--- /dev/null
+++ b/app/models/fax_document.rb
@@ -0,0 +1,82 @@
+class FaxDocument < ActiveRecord::Base
+#  attr_accessible :inbound, :transmission_time, :sent_at, :document_total_pages, :document_transferred_pages, :ecm_requested, :ecm_used, :image_resolution, :image_size, :local_station_id, :result_code, :result_text, :remote_station_id, :success, :transfer_rate, :t38_gateway_format, :t38_peer, :document
+
+  mount_uploader :document, DocumentUploader
+  mount_uploader :tiff, TiffUploader
+
+  validates_presence_of :document
+  validates_numericality_of :retry_counter, :only_integer => true, :greater_than_or_equal_to => 0
+
+  belongs_to :fax_account
+  belongs_to :fax_resolution
+  
+  validates_presence_of :fax_resolution_id
+  validates_presence_of :fax_resolution
+  
+  has_one :destination_phone_number, :class_name => 'PhoneNumber', :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :destination_phone_number
+
+  has_many :fax_thumbnails, :order => :position, :dependent => :destroy
+
+  after_create :render_thumbnails
+  after_create :convert_pdf_to_tiff
+  
+  # Scopes
+  scope :inbound, where(:state => 'inbound')
+  scope :outbound, where(:state => ['queued_for_sending','sending','successful','unsuccessful'])
+
+  # State Machine stuff
+  state_machine :initial => :new do
+    event :queue_for_sending do
+      transition [:new] => :queued_for_sending
+    end
+    
+    event :send_now do
+      transition [:queued_for_sending] => :sending
+    end
+    
+    event :cancel do
+      transition [:sending, :queued_for_sending] => :unsuccessful
+    end
+    
+    event :successful_sent do
+      transition [:sending, :queued_for_sending] => :successful
+    end
+    
+    event :mark_as_inbound do
+      transition [:new] => :inbound
+    end  
+  end
+  
+  def to_s
+    name
+  end
+  
+  private
+  def render_thumbnails
+    directory = "/tmp/GS-#{GEMEINSCHAFT_VERSION}/fax_thumbnails/#{self.id}"
+    system('mkdir -p ' + directory)
+    system("cd #{directory} && convert #{Rails.root.to_s}/public#{self.document.to_s}[0-100] -colorspace Gray PNG:'fax_page.png'")
+    number_of_thumbnails = Dir["#{directory}/fax_page-*.png"].count
+    (0..(number_of_thumbnails-1)).each do |i|
+      fax_thumbnail = self.fax_thumbnails.build
+      fax_thumbnail.thumbnail = File.open("#{directory}/fax_page-#{i}.png")
+      fax_thumbnail.save!
+    end
+    system("rm -rf #{directory}")
+    self.update_attributes(:document_total_pages => number_of_thumbnails) if self.document_total_pages.nil?
+  end
+  
+  def convert_pdf_to_tiff
+    page_size_a4 = '595 842'
+    page_size_command = "<< /Policies << /PageSize 3 >> /InputAttributes currentpagedevice /InputAttributes get dup { pop 1 index exch undef } forall dup 0 << /PageSize [ #{page_size_a4} ] >> put >> setpagedevice"
+    directory = "/tmp/GS-#{GEMEINSCHAFT_VERSION}/faxes/#{self.id}"
+    system('mkdir -p ' + directory)
+    tiff_file_name = File.basename(self.document.to_s.downcase, ".pdf") + '.tiff'
+    system "cd #{directory} && gs -q -r#{self.fax_resolution.resolution_value} -dNOPAUSE -dBATCH -dSAFER -sDEVICE=tiffg3 -sOutputFile=\"#{tiff_file_name}\" -c \"#{page_size_command}\" -- \"#{Rails.root.to_s}/public#{self.document.to_s}\""
+    self.tiff = File.open("#{directory}/#{tiff_file_name}")
+    self.save
+    system("rm -rf #{directory}")
+  end
+
+end
diff --git a/app/models/fax_resolution.rb b/app/models/fax_resolution.rb
new file mode 100644
index 0000000..c9093fb
--- /dev/null
+++ b/app/models/fax_resolution.rb
@@ -0,0 +1,15 @@
+class FaxResolution < ActiveRecord::Base
+  validates_presence_of :name
+  validates_presence_of :resolution_value
+  
+  validates_uniqueness_of :name
+  validates_uniqueness_of :resolution_value
+  
+  has_many :fax_documents, :dependent => :destroy
+  
+  acts_as_list
+  
+  def to_s
+    self.name
+  end
+end
diff --git a/app/models/fax_thumbnail.rb b/app/models/fax_thumbnail.rb
new file mode 100644
index 0000000..a29c9ad
--- /dev/null
+++ b/app/models/fax_thumbnail.rb
@@ -0,0 +1,8 @@
+class FaxThumbnail < ActiveRecord::Base
+  mount_uploader :thumbnail, ThumbnailUploader
+  validates_presence_of :thumbnail
+  
+  belongs_to :fax_document
+  
+  acts_as_list :scope => :fax_document
+end
diff --git a/app/models/freeswitch_alias.rb b/app/models/freeswitch_alias.rb
new file mode 100644
index 0000000..9953edb
--- /dev/null
+++ b/app/models/freeswitch_alias.rb
@@ -0,0 +1,23 @@
+class FreeswitchAlias < ActiveRecord::Base
+  self.table_name = 'aliases'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_call.rb b/app/models/freeswitch_call.rb
new file mode 100644
index 0000000..95b2cdd
--- /dev/null
+++ b/app/models/freeswitch_call.rb
@@ -0,0 +1,24 @@
+class FreeswitchCall < ActiveRecord::Base
+  self.table_name = 'calls'
+  self.primary_key = 'call_uuid'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_cdr.rb b/app/models/freeswitch_cdr.rb
new file mode 100644
index 0000000..fd0eb75
--- /dev/null
+++ b/app/models/freeswitch_cdr.rb
@@ -0,0 +1,4 @@
+class FreeswitchCdr < ActiveRecord::Base
+  self.table_name = 'cdrs'
+  self.primary_key = 'uuid'
+end
diff --git a/app/models/freeswitch_channel.rb b/app/models/freeswitch_channel.rb
new file mode 100644
index 0000000..489e17d
--- /dev/null
+++ b/app/models/freeswitch_channel.rb
@@ -0,0 +1,24 @@
+class FreeswitchChannel < ActiveRecord::Base
+  self.table_name = 'channels'
+  self.primary_key = 'uuid'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_complete.rb b/app/models/freeswitch_complete.rb
new file mode 100644
index 0000000..e7ff465
--- /dev/null
+++ b/app/models/freeswitch_complete.rb
@@ -0,0 +1,23 @@
+class FreeswitchComplete < ActiveRecord::Base
+    self.table_name = 'complete'
+    
+    # Makes sure that this is a readonly model.
+    def readonly?
+      return true
+    end
+
+    # Prevent objects from being destroyed
+    def before_destroy
+      raise ActiveRecord::ReadOnlyRecord
+    end
+
+    # Prevent objects from being deleted
+    def self.delete_all
+      raise ActiveRecord::ReadOnlyRecord
+    end
+
+    # Prevent objects from being deleted
+    def delete
+      raise ActiveRecord::ReadOnlyRecord
+    end
+end
diff --git a/app/models/freeswitch_fifo_bridge.rb b/app/models/freeswitch_fifo_bridge.rb
new file mode 100644
index 0000000..06167f3
--- /dev/null
+++ b/app/models/freeswitch_fifo_bridge.rb
@@ -0,0 +1,23 @@
+class FreeswitchFifoBridge < ActiveRecord::Base
+  self.table_name = 'fifo_bridge'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_fifo_caller.rb b/app/models/freeswitch_fifo_caller.rb
new file mode 100644
index 0000000..50c1fb5
--- /dev/null
+++ b/app/models/freeswitch_fifo_caller.rb
@@ -0,0 +1,23 @@
+class FreeswitchFifoCaller < ActiveRecord::Base
+  self.table_name = 'fifo_callers'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_fifo_outbound.rb b/app/models/freeswitch_fifo_outbound.rb
new file mode 100644
index 0000000..029c21d
--- /dev/null
+++ b/app/models/freeswitch_fifo_outbound.rb
@@ -0,0 +1,23 @@
+class FreeswitchFifoOutbound < ActiveRecord::Base
+  self.table_name = 'fifo_outbound'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_interface.rb b/app/models/freeswitch_interface.rb
new file mode 100644
index 0000000..1602d62
--- /dev/null
+++ b/app/models/freeswitch_interface.rb
@@ -0,0 +1,23 @@
+class FreeswitchInterface < ActiveRecord::Base
+  self.table_name = 'interfaces'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_nat.rb b/app/models/freeswitch_nat.rb
new file mode 100644
index 0000000..8baf2bf
--- /dev/null
+++ b/app/models/freeswitch_nat.rb
@@ -0,0 +1,23 @@
+class FreeswitchNat < ActiveRecord::Base
+  self.table_name = 'nat'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_registration.rb b/app/models/freeswitch_registration.rb
new file mode 100644
index 0000000..7e80815
--- /dev/null
+++ b/app/models/freeswitch_registration.rb
@@ -0,0 +1,23 @@
+class FreeswitchRegistration < ActiveRecord::Base
+  self.table_name = 'registrations'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_task.rb b/app/models/freeswitch_task.rb
new file mode 100644
index 0000000..6e964d2
--- /dev/null
+++ b/app/models/freeswitch_task.rb
@@ -0,0 +1,23 @@
+class FreeswitchTask < ActiveRecord::Base
+  self.table_name = 'tasks'
+  
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/freeswitch_voicemail_pref.rb b/app/models/freeswitch_voicemail_pref.rb
new file mode 100644
index 0000000..b2400e8
--- /dev/null
+++ b/app/models/freeswitch_voicemail_pref.rb
@@ -0,0 +1,23 @@
+class FreeswitchVoicemailPref < ActiveRecord::Base
+  self.table_name = 'voicemail_prefs'
+
+  # Makes sure that this is a readonly model.
+  def readonly?
+    return true
+  end
+ 
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def delete
+    raise ActiveRecord::ReadOnlyRecord
+  end
+end
diff --git a/app/models/gemeinschaft_setup.rb b/app/models/gemeinschaft_setup.rb
new file mode 100644
index 0000000..b445b21
--- /dev/null
+++ b/app/models/gemeinschaft_setup.rb
@@ -0,0 +1,8 @@
+class GemeinschaftSetup < ActiveRecord::Base
+  belongs_to :user
+  accepts_nested_attributes_for :user
+  belongs_to :sip_domain
+  accepts_nested_attributes_for :sip_domain
+  belongs_to :country
+  belongs_to :language
+end
diff --git a/app/models/gs_cluster_sync_log_entry.rb b/app/models/gs_cluster_sync_log_entry.rb
new file mode 100644
index 0000000..063ff23
--- /dev/null
+++ b/app/models/gs_cluster_sync_log_entry.rb
@@ -0,0 +1,99 @@
+class GsClusterSyncLogEntry < ActiveRecord::Base
+  attr_accessible :gs_node_id, :class_name, :action, :content, :status, :history, 
+                  :homebase_ip_address, :waiting_to_be_synced, :association_method,
+                  :association_uuid
+
+  validates :class_name,
+            :presence => true
+
+  validates :action,
+            :presence => true
+
+  validates :content,
+            :presence => true
+
+  after_create :apply_to_local_database
+
+  def apply_to_local_database
+    if self.homebase_ip_address != HOMEBASE_IP_ADDRESS
+      if self.class_name.constantize.new.attribute_names.include?('is_native')
+        case self.action
+        when 'create'
+          new_local_copy = self.class_name.constantize.new(
+                           JSON(self.content).
+                           delete_if{|key, value| ['id','updated_at','created_at'].
+                           include?(key) }, 
+                           :without_protection => true)
+          new_local_copy.is_native = false
+          find_and_connect_to_an_association(new_local_copy)
+          if new_local_copy.save(:validate => false)
+            logger.info "Created local copy of #{self.class_name} with the ID #{new_local_copy.id}. #{new_local_copy.to_s}"
+          else
+            logger.error "Couldn't create a local copy of #{self.class_name} with the ID #{new_local_copy.id}. #{new_local_copy.errors.to_yaml}"
+          end
+
+        when 'update'
+          local_copy = find_local_copy
+          if local_copy
+            # Only update an object if the update it self is newer than the local object.
+            #
+            if local_copy.updated_at < JSON(self.content)['updated_at'].to_time
+              local_copy.update_attributes(JSON(self.content).delete_if{|key, value| ['id','updated_at','created_at'].include?(key) }, :without_protection => true)
+              find_and_connect_to_an_association(local_copy)
+              if local_copy.save(:validate => false)
+                logger.info "Updated local copy of #{self.class_name} with the ID #{local_copy.id}. #{local_copy.to_s}"
+              else
+                logger.error "Couldn't update local copy of #{self.class_name} with the ID #{local_copy.id}. #{local_copy.errors.to_yaml}"
+              end
+            else
+              logger.error "Didn't update local copy of #{self.class_name} with the ID #{local_copy.id} because of a race condition (the local version was newer than the update). Please check GsClusterSyncLogEntry ID #{self.id}."
+            end
+          else
+            logger.error "Couldn't find local copy of #{self.class_name}. #{self.content}"
+          end 
+
+        when 'destroy'
+          local_copy = find_local_copy
+          if local_copy
+            local_copy.destroy
+            logger.info "Destroyed local copy of #{self.class_name} with the ID #{local_copy.id}. #{local_copy.to_s}"
+          else
+            logger.error "Couldn't find local copy of #{self.class_name}. #{self.content}"
+          end
+        end
+      else
+        logger.error "The class #{self.class_name} doesn't offer the attribute is_native. Can't synchronize without."
+      end
+    end
+  end
+
+  def find_local_copy
+    self.class_name.constantize.find_by_uuid(JSON(self.content)['uuid'])
+  end
+
+  # Connect to the association (e.g. User to a SipAccount)
+  #
+  def find_and_connect_to_an_association(local_copy)
+    if !(self.association_method.blank? || self.association_uuid.blank?) && (self.association_method_changed? || self.association_uuid_changed?)
+      name_of_the_association_type = local_copy.attribute_names.delete_if{|x| !x.include?('_type')}.first
+      association = local_copy.send(name_of_the_association_type).constantize.where(:uuid => self.association_uuid).first
+      if association
+        local_copy.send "#{association_method}=", association
+      end
+    end
+  end
+
+  def populate_other_cluster_nodes
+    if self.homebase_ip_address == HOMEBASE_IP_ADDRESS && self.waiting_to_be_synced == true
+      if GsNode.where(:push_updates_to => true).count > 0
+        GsNode.where(:push_updates_to => true).each do |gs_node|
+          RemoteGsNode::GsClusterSyncLogEntry.site = gs_node.site
+          remote_enty = RemoteGsNode::GsClusterSyncLogEntry.create(self.attributes.delete_if{|key, value| ['id','updated_at','created_at'].include?(key) })
+          self.update_attributes(:waiting_to_be_synced => false)
+          self.save
+        end
+      end
+    end
+  end
+  
+end
diff --git a/app/models/gs_node.rb b/app/models/gs_node.rb
new file mode 100644
index 0000000..229ceb2
--- /dev/null
+++ b/app/models/gs_node.rb
@@ -0,0 +1,30 @@
+class GsNode < ActiveRecord::Base
+  attr_accessible :name, :ip_address, :site, :element_name, :push_updates_to, :accepts_updates_from
+
+  has_many :phone_numbers, :foreign_key => :gs_node_id, :dependent => :destroy
+  has_many :users, :foreign_key => :gs_node_id, :dependent => :destroy
+  has_many :sip_accounts, :foreign_key => :gs_node_id, :dependent => :destroy
+  has_many :hunt_groups, :foreign_key => :gs_node_id, :dependent => :destroy
+
+  validates :name,
+            :presence => true
+
+  validates :ip_address,
+            :presence => true
+
+  validates :site,
+            :presence => true
+
+  validates :element_name,
+            :presence => true
+
+  def to_s
+    name
+  end
+
+  def synced
+    self.last_sync = Time.now
+    return self.save
+  end
+
+end
diff --git a/app/models/gui_function.rb b/app/models/gui_function.rb
new file mode 100644
index 0000000..e27a8d2
--- /dev/null
+++ b/app/models/gui_function.rb
@@ -0,0 +1,40 @@
+class GuiFunction < ActiveRecord::Base
+  attr_accessible :category, :name, :description, :gui_function_memberships_attributes
+
+  has_many :gui_function_memberships, :dependent => :destroy
+  has_many :user_groups, :through => :gui_function_memberships
+
+  accepts_nested_attributes_for :gui_function_memberships
+
+  validates :name, :presence => true, 
+                   :format => { :with => /\A[a-z_0-9]+\z/, :message => "Only lower case letters allowed" },
+                   :length => { :in => 3..255 },
+                   :uniqueness => true
+
+  def to_s
+    self.name
+  end
+
+  def self.display?(function_name = nil, user)
+    if function_name.blank? || GemeinschaftSetup.count == 0
+      true
+    else
+      if !user || user.class != User || function_name.class != String
+        false
+      else
+        function_name = function_name.downcase
+
+        activated_gui_function_names = GuiFunctionMembership.where(:user_group_id => user.user_group_ids, :activated => true).map{|gui_function_membership| gui_function_membership.gui_function.name}.uniq
+        deactivated_gui_function_names = GuiFunctionMembership.where(:user_group_id => user.user_group_ids, :activated => false).map{|gui_function_membership| gui_function_membership.gui_function.name}.uniq
+
+        deactivated_gui_function_names = deactivated_gui_function_names - activated_gui_function_names
+
+        if deactivated_gui_function_names.include?(function_name)
+          false
+        else
+          true
+        end
+      end
+    end
+  end
+end
diff --git a/app/models/gui_function_membership.rb b/app/models/gui_function_membership.rb
new file mode 100644
index 0000000..d2bc7cd
--- /dev/null
+++ b/app/models/gui_function_membership.rb
@@ -0,0 +1,7 @@
+class GuiFunctionMembership < ActiveRecord::Base
+	belongs_to :gui_function
+	belongs_to :user_group
+
+	validates_associated :gui_function
+	validates_associated :user_group
+end
diff --git a/app/models/hunt_group.rb b/app/models/hunt_group.rb
new file mode 100644
index 0000000..276ae53
--- /dev/null
+++ b/app/models/hunt_group.rb
@@ -0,0 +1,43 @@
+class HuntGroup < ActiveRecord::Base
+  attr_accessible :name, :strategy, :seconds_between_jumps, :phone_numbers_attributes
+
+  belongs_to :tenant
+  has_many :call_forwards, :as => :call_forwardable, :dependent => :destroy
+
+  validates_uniqueness_of :name, :scope => :tenant_id,
+                                 :allow_nil => true, :allow_blank => true
+
+  validates_presence_of  :strategy
+  validates_inclusion_of :strategy, :in => HUNT_GROUP_STRATEGIES
+
+  validates_presence_of     :seconds_between_jumps, 
+                            :if => Proc.new{ |hunt_group| hunt_group.strategy != 'ring_all' }
+  validates_numericality_of :seconds_between_jumps,
+                            :only_integer => true,
+                            :greater_than_or_equal_to => VALID_SECONDS_BETWEEN_JUMPS_VALUES.min,
+                            :less_than_or_equal_to => VALID_SECONDS_BETWEEN_JUMPS_VALUES.max,
+                            :if => Proc.new{ |hunt_group| hunt_group.strategy != 'ring_all' }
+  validates_inclusion_of    :seconds_between_jumps, 
+                            :in => VALID_SECONDS_BETWEEN_JUMPS_VALUES,
+                            :if => Proc.new{ |hunt_group| hunt_group.strategy != 'ring_all' }
+  validates_inclusion_of    :seconds_between_jumps,
+                            :in => [nil],
+                            :if => Proc.new{ |hunt_group| hunt_group.strategy == 'ring_all' }
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  has_many :hunt_group_members, :dependent => :destroy, :order => :position
+
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  has_many :hunt_group_members, :dependent => :destroy
+
+  def to_s
+    self.name || I18n.t('hunt_groups.name') + ' ID ' + self.id.to_s
+  end
+
+end
diff --git a/app/models/hunt_group_member.rb b/app/models/hunt_group_member.rb
new file mode 100644
index 0000000..7d9d3e0
--- /dev/null
+++ b/app/models/hunt_group_member.rb
@@ -0,0 +1,67 @@
+class HuntGroupMember < ActiveRecord::Base
+  attr_accessible :name, :active, :can_switch_status_itself, :phone_numbers_attributes
+
+  belongs_to :hunt_group
+  validates_presence_of :hunt_group
+
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  acts_as_list :scope => :hunt_group
+
+  after_save :set_presence
+  after_save :trigger_connected_call_forward_if_necessary
+
+  def to_s
+	  self.name || I18n.t('hunt_group_members.name') + ' ID ' + self.id.to_s
+  end
+
+  private
+  def set_presence
+    dialplan_function = nil
+    state = 'terminated'
+
+    if self.active
+      state = 'confirmed'
+    end
+
+    require 'freeswitch_event'
+    event = FreeswitchEvent.new("PRESENCE_IN")
+    event.add_header("proto", "sip")
+    event.add_header("from", "f-hgmtg-#{self.id}@#{SipDomain.first.host}")
+    event.add_header("event_type", "presence")
+    event.add_header("alt_event_type", "dialog")
+    event.add_header("presence-call-direction", "outbound")
+    event.add_header("answer-state",  state)
+    event.add_header("unique-id", "hunt_group_member_#{self.id}")
+    return event.fire()
+  end
+
+  # Turn on/off a connected CallForward.
+  # The last member who leaves the hunt_group deactivates the CallForward and the 
+  # first member actives it.
+  #
+  def trigger_connected_call_forward_if_necessary
+    if self.active_changed? && self.hunt_group.hunt_group_members.count > 0
+      # deactive CallForward
+      #
+      if self.hunt_group.hunt_group_members.where(:active => false).count == self.hunt_group.hunt_group_members.count
+        self.hunt_group.call_forwards.where(:active => true).each do |x|
+          x.update_attributes({:active => false})
+        end
+      end
+
+      # active CallForward
+      #
+      if self.hunt_group.hunt_group_members.where(:active => true).count > 0
+        self.hunt_group.call_forwards.where(:active => false).each do |x|
+          x.update_attributes({:active => true})
+        end
+      end
+    end
+  end
+
+
+end
diff --git a/app/models/language.rb b/app/models/language.rb
new file mode 100644
index 0000000..1b9c2c0
--- /dev/null
+++ b/app/models/language.rb
@@ -0,0 +1,11 @@
+class Language < ActiveRecord::Base
+  has_many :tenants
+  has_many :users
+
+  validates_presence_of :name
+  validates_presence_of :code
+
+  def to_s
+    name
+  end
+end
diff --git a/app/models/manufacturer.rb b/app/models/manufacturer.rb
new file mode 100644
index 0000000..03d2bb7
--- /dev/null
+++ b/app/models/manufacturer.rb
@@ -0,0 +1,46 @@
+class Manufacturer < ActiveRecord::Base
+  attr_accessible :name, :ieee_name, :homepage_url
+  
+  # Associations:
+  #
+  has_many :ouis, :dependent => :destroy
+  has_many :phone_models, :order => :name, :dependent => :destroy
+  
+  
+  # Validations:
+  #
+  validates_presence_of :name
+  validates_presence_of :ieee_name
+  
+  validates_uniqueness_of :name, :case_sensitive => false
+  
+  validate :validate_homepage_url
+  
+  # State Machine stuff
+  default_scope where(:state => 'active').order(:name)
+  state_machine :initial => :active do
+
+    event :deactivate do
+      transition [:active] => :deactivated
+    end
+    
+    event :activate do
+      transition [:deactivated] => :active
+    end
+  end
+  
+  def to_s
+    self.name
+  end
+  
+  private
+  
+  def validate_homepage_url
+    if ! self.homepage_url.blank?
+      if ! CustomValidators.validate_url( self.homepage_url )
+        errors.add( :homepage_url, "is invalid." )
+      end
+    end
+  end
+  
+end
diff --git a/app/models/oui.rb b/app/models/oui.rb
new file mode 100644
index 0000000..9a5bb1f
--- /dev/null
+++ b/app/models/oui.rb
@@ -0,0 +1,17 @@
+class Oui < ActiveRecord::Base
+  attr_accessible :value
+  
+  validates_presence_of :manufacturer
+  validates_presence_of :value
+  
+  belongs_to :manufacturer
+  
+  # State Machine stuff
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+  end
+  
+  def to_s
+    value
+  end
+end
diff --git a/app/models/phone.rb b/app/models/phone.rb
new file mode 100644
index 0000000..89371eb
--- /dev/null
+++ b/app/models/phone.rb
@@ -0,0 +1,240 @@
+require 'scanf'
+
+class Phone < ActiveRecord::Base
+  
+  attr_accessible :mac_address, :ip_address, :http_user, :http_password, 
+                  :phone_model_id, :hot_deskable, :nightly_reboot,
+                  :provisioning_key, :provisioning_key_active
+  
+  # Associations
+  #
+  belongs_to :phone_model
+  belongs_to :phoneable, :polymorphic => true
+
+  has_many :phone_sip_accounts, :dependent => :destroy, :uniq => true, :order => :position
+  has_many :sip_accounts, :through => :phone_sip_accounts
+  
+  # Validations
+  #
+  before_validation :sanitize_mac_address
+  
+  validates_presence_of     :mac_address
+  validate_mac_address      :mac_address
+  validates_uniqueness_of   :mac_address
+  
+  validates_uniqueness_of   :ip_address,
+    :if => Proc.new { |me| ! me.ip_address.blank? }
+  validate_ip_address       :ip_address,
+    :if => Proc.new { |me| ! me.ip_address.blank? }
+  
+  validates_presence_of     :phone_model
+  validates_presence_of     :phoneable
+  
+  before_save :save_last_ip_address
+  before_save :destroy_phones_sip_accounts_if_phoneable_changed
+  before_save :remove_ip_address_when_mac_address_was_changed
+  
+  # State machine:
+  #
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+    
+    event :deactivate do
+      transition [:active] => :deactivated
+    end
+    
+    event :activate do
+      transition [:deactivated] => :active
+    end
+  end
+  
+  def to_s
+    "%s %s %s" % [
+      pretty_mac_address,
+      "(#{self.phone_model})",
+      self.ip_address ? "(#{self.ip_address})" : "",
+    ]
+  end
+  
+  def pretty_mac_address
+    return [].fill('%02X', 0, 6).join(':') % self.mac_address.scanf( '%2X' * 6 )
+  end
+
+
+  def resync(reboot = false, sip_account = nil)
+    if ! self.phone_model || ! self.phone_model.manufacturer
+      return false
+    end
+
+    if self.phone_model.manufacturer.ieee_name == 'SNOM Technology AG'
+      if !sip_account
+        self.sip_accounts.where(:sip_accountable_type => self.phoneable_type).each do |sip_account_associated|
+          if sip_account_associated.registration
+            sip_account = sip_account_associated
+            break
+          end
+        end
+      end
+
+      if ! sip_account or ! sip_account.registration
+        require 'open-uri'
+        begin
+          if open("http://#{self.ip_address}/advanced_update.htm?reboot=Reboot", :http_basic_authentication=>[self.http_user, self.http_password], :proxy => nil)
+            return true
+          end
+        rescue
+          return false
+        end
+      end
+
+      require 'freeswitch_event'
+      event = FreeswitchEvent.new("NOTIFY")
+      event.add_header("profile", "gemeinschaft")
+      event.add_header("event-string", "check-sync;reboot=#{reboot.to_s}")
+      event.add_header("user", sip_account.auth_name)
+      event.add_header("host", sip_account.sip_domain.host)
+      event.add_header("content-type", "application/simple-message-summary")   
+      return event.fire()
+
+    elsif self.phone_model.manufacturer.ieee_name == 'Siemens Enterprise CommunicationsGmbH & Co. KG'
+      require 'open-uri'
+      begin
+        if open("http://#{self.ip_address}:8085/contact_dls.html/ContactDLS", :http_basic_authentication=>[self.http_user, self.http_password], :proxy => nil)
+          return true
+        end
+      rescue
+        return false
+      end
+    end
+      
+    return false
+  end
+
+
+  # OPTIMIZE i18n translations
+  def user_login(user, sip_account = nil)
+    if ! self.hot_deskable
+      errors.add(:hot_deskable, "Phone not hot-deskable")
+      return false
+    end
+
+    phones_affected = Hash.new()
+    sip_accounts = Array.new(1, sip_account)
+    
+    if !sip_account
+      sip_accounts = user.sip_accounts.where(:hotdeskable => true).all
+    end
+
+    if sip_accounts.blank?
+      errors.add(:sip_accounts, "No hot-deskable Sip Accounts available")
+      return false
+    end
+
+    sip_account_resync = self.sip_accounts.where(:sip_accountable_type => self.phoneable_type).first
+
+    phones_affected.each_pair do |id,phone|
+      if phone.id != self.id
+        phone.user_logout()
+      end
+    end
+
+    self.phoneable = user
+    sip_accounts.each do |sip_account|
+      if ! self.sip_accounts.where(:id => sip_account.id).first
+        self.sip_accounts.push(sip_account)
+      end
+    end
+    
+    @not_destroy_phones_sip_accounts = true
+    if ! self.save
+      return false
+    end
+    
+    sleep(0.5)
+
+    if ! self.resync(true, sip_account_resync)
+      errors.add(:resync, "Resync failed")
+      return false
+    end
+
+    return true
+  end
+
+
+  # OPTIMIZE i18n translations
+  def user_logout
+    if ! self.hot_deskable or self.phoneable_type == 'Tenant'
+      errors.add(:hot_deskable, "Phone not hot-deskable")
+      return false
+    end
+
+    sip_account = self.sip_accounts.where(:sip_accountable_type => self.phoneable_type).first
+
+    tenant_sip_account = self.sip_accounts.where(:sip_accountable_type => 'Tenant').first
+    if tenant_sip_account 
+      tenant = tenant_sip_account.sip_accountable
+    end
+
+    sip_account_ids = Array.new()
+    self.sip_accounts.where(:sip_accountable_type => 'User', :hotdeskable => true).each do |sip_account|
+      sip_account_ids.push(sip_account.id)
+    end
+
+    if tenant 
+      self.phoneable = tenant
+      @not_destroy_phones_sip_accounts = true
+      if ! self.save
+        errors.add(:phoneable, "Could not change owner")
+        return false
+      end
+    end
+
+    if ! PhoneSipAccount.destroy_all(:sip_account_id => sip_account_ids)
+      errors.add(:sip_accounts, "Could not delete sip_accounts")
+      return false
+    end
+
+    sleep(0.5)
+
+    if ! self.resync(true, sip_account)
+      errors.add(:resync, "Resync failed")
+      return false
+    end
+
+    return true
+  end
+
+  private
+  
+  # Sanitize MAC address.
+  #
+  def sanitize_mac_address
+    self.mac_address = self.mac_address.to_s.upcase.gsub( /[^A-F0-9]/, '' )
+  end
+  
+  # Saves the last IP address.
+  #
+  def save_last_ip_address
+    if self.ip_address_changed? \
+    && self.ip_address != self.ip_address_was
+      self.last_ip_address = self.ip_address_was
+    end
+  end
+  
+  # When ever the parent of a phone changes all the SIP accounts associations
+  # are destroyed unless this is a user logout operation
+  #
+  def destroy_phones_sip_accounts_if_phoneable_changed
+    if (self.phoneable_type_changed? || self.phoneable_id_changed?) && ! @not_destroy_phones_sip_accounts
+      self.phone_sip_accounts.destroy_all
+    end
+  end
+
+  def remove_ip_address_when_mac_address_was_changed
+    if self.mac_address_changed?
+      self.ip_address = nil
+      self.last_ip_address = nil
+    end
+  end
+  
+end
diff --git a/app/models/phone_book.rb b/app/models/phone_book.rb
new file mode 100644
index 0000000..3603eae
--- /dev/null
+++ b/app/models/phone_book.rb
@@ -0,0 +1,33 @@
+class PhoneBook < ActiveRecord::Base
+  attr_accessible :name, :description, :uuid
+  
+  belongs_to :phone_bookable, :polymorphic => true
+  has_many :phone_book_entries, :dependent => :destroy
+  
+  validates_presence_of :name
+  validates_uniqueness_of :name, :scope => [ :phone_bookable_type, :phone_bookable_id ] 
+  
+  validates_length_of :name, :within => 1..50
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  # State Machine stuff
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+  end
+  
+  def to_s
+    name
+  end
+
+  def find_entry_by_number(number)
+    phone_book_entries_ids = self.phone_book_entries.map{|phone_book_entry| phone_book_entry.id}
+    
+    phone_number = PhoneNumber.where(:phone_numberable_id => phone_book_entries_ids, :phone_numberable_type => 'PhoneBookEntry', :number => number).first
+
+    if phone_number
+      return phone_number.phone_numberable
+    end
+  end
+end
diff --git a/app/models/phone_book_entry.rb b/app/models/phone_book_entry.rb
new file mode 100644
index 0000000..db2b44b
--- /dev/null
+++ b/app/models/phone_book_entry.rb
@@ -0,0 +1,109 @@
+# encoding: UTF-8
+
+class PhoneBookEntry < ActiveRecord::Base
+  before_save :run_phonetic_algorithm
+  before_save :save_value_of_to_s
+  
+  attr_accessible :first_name, :middle_name, :last_name, :title, :nickname, :organization, :is_organization, :department, :job_title, :is_male, :birthday, :birth_name, :description, :homepage_personal, :homepage_organization, :twitter_account, :facebook_account, :google_plus_account, :xing_account, :linkedin_account, :mobileme_account, :image
+  
+  belongs_to :phone_book
+  has_many :conference_invitees, :dependent => :destroy
+  
+  acts_as_list :scope => :phone_book
+  
+  validates_presence_of :phone_book
+  
+  validates_presence_of :last_name,
+    :unless => Proc.new { |entry| entry.is_organization }
+  
+  validates_presence_of :organization,
+    :if     => Proc.new { |entry| entry.is_organization }
+  
+  validates_inclusion_of :is_male, :in => [true, false, 1, '1', 'on'],
+    :unless => Proc.new { |entry| entry.is_organization }
+    
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  
+  has_many :addresses, :dependent => :destroy
+    
+  # Avatar like photo  
+  mount_uploader :image, ImageUploader  
+  
+  # TODO Validate homepage URLs and social media accounts.
+  
+  
+  default_scope where(:state => 'active')
+  
+  # State Machine stuff
+  state_machine :initial => :active do
+  end
+  
+  def to_s
+    if self.is_organization
+      "#{self.organization}".strip
+    else
+      [self.last_name.strip, self.first_name.strip].join(', ')
+    end
+  end
+  
+  def self.koelner_phonetik(input)
+    if input.blank?
+      nil
+    else
+      # TODO: koelner_phonetik() needs to be tested.
+  
+      # Umwandeln in Grossbuchstaben
+      phonetik = input.upcase.gsub(/[^A-ZÜüÖöÄäß]/,'').strip
+  
+      # Umwandeln anhand der Tabelle auf 
+      # http://de.wikipedia.org/wiki/K%C3%B6lner_Verfahren
+      phonetik = phonetik.gsub(/([XKQ])X/, '\1'+'8')
+      phonetik = phonetik.gsub(/[DT]([CSZ])/, '8'+'\1')
+      phonetik = phonetik.gsub(/C([^AHKOQUX])/, '8'+'\1')
+      phonetik = phonetik.gsub(/^C([^AHKLOQRUX])/, '8'+'\1')
+      phonetik = phonetik.gsub(/([SZ])C/, '\1'+'8')
+      phonetik = phonetik.gsub(/[SZß]/, '8')
+      phonetik = phonetik.gsub(/R/, '7')
+      phonetik = phonetik.gsub(/[MN]/, '6')
+      phonetik = phonetik.gsub(/L/, '5')
+      phonetik = phonetik.gsub(/X/, '48')
+      phonetik = phonetik.gsub(/([^SZ])C([AHKOQUX])/, '\1'+'4'+'\2'  )
+      phonetik = phonetik.gsub(/^C([AHKLOQRUX])/, '4'+'\1')
+      phonetik = phonetik.gsub(/[GKQ]/, '4')
+      phonetik = phonetik.gsub(/PH/, '3H')
+      phonetik = phonetik.gsub(/[FVW]/, '3')
+      phonetik = phonetik.gsub(/[DT]([^CSZ])/, '2'+'\1')
+      phonetik = phonetik.gsub(/[BP]/, '1')
+      phonetik = phonetik.gsub(/H/, '')
+      phonetik = phonetik.gsub(/[AEIJOUYÜüÖöÄä]/, '0')
+  
+      # Regeln für Buchstaben am Ende des Wortes
+      phonetik = phonetik.gsub(/P/, '1')
+      phonetik = phonetik.gsub(/[DT]/, '2')
+      phonetik = phonetik.gsub(/C/, '8')
+  
+      # Entfernen aller doppelten
+      phonetik = phonetik.gsub(/([0-9])\1+/, '\1')
+  
+      # Entfernen aller Codes "0" außer am Anfang.
+      phonetik = phonetik.gsub(/^0/, 'X')
+      phonetik = phonetik.gsub(/0/, '')
+      phonetik = phonetik.gsub(/^X/, '0')
+  
+      phonetik
+    end
+  end
+  
+  private
+
+  def run_phonetic_algorithm
+    self.first_name_phonetic = PhoneBookEntry.koelner_phonetik(self.first_name) if self.first_name_changed?
+    self.last_name_phonetic = PhoneBookEntry.koelner_phonetik(self.last_name) if self.last_name_changed?
+    self.organization_phonetic = PhoneBookEntry.koelner_phonetik(self.organization) if self.organization_changed?
+  end
+  
+  def save_value_of_to_s
+    self.value_of_to_s = self.to_s
+  end
+  
+end
diff --git a/app/models/phone_model.rb b/app/models/phone_model.rb
new file mode 100644
index 0000000..e00e0e3
--- /dev/null
+++ b/app/models/phone_model.rb
@@ -0,0 +1,56 @@
+class PhoneModel < ActiveRecord::Base
+  attr_accessible :name, :product_manual_homepage_url, :product_homepage_url, :uuid
+  
+  # Associations
+  #
+  belongs_to :manufacturer
+  
+  has_many :phones, :dependent => :destroy
+  
+  # Validations
+  #
+  validates_presence_of :name
+  validate :validate_product_manual_homepage_url
+  validate :validate_product_homepage_url
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+  
+  def to_s
+    self.name
+  end
+  
+  # State machine:
+  #
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+    
+    event :deactivate do
+      transition [:active] => :deactivated
+    end
+    
+    event :activate do
+      transition [:deactivated] => :active
+    end
+  end
+  
+  
+  private
+  
+  def validate_product_manual_homepage_url
+    if ! self.product_manual_homepage_url.blank?
+      if ! CustomValidators.validate_url( self.product_manual_homepage_url )
+        errors.add( :product_manual_homepage_url, "is invalid." )
+      end
+    end
+  end
+  
+  def validate_product_homepage_url
+    if ! self.product_homepage_url.blank?
+      if ! CustomValidators.validate_url( self.product_homepage_url )
+        errors.add( :product_homepage_url, "is invalid." )
+      end
+    end
+  end
+  
+end
diff --git a/app/models/phone_number.rb b/app/models/phone_number.rb
new file mode 100644
index 0000000..4c0cf46
--- /dev/null
+++ b/app/models/phone_number.rb
@@ -0,0 +1,304 @@
+class PhoneNumber < ActiveRecord::Base
+  NUMBER_TYPES_INBOUND = ['SipAccount', 'Conference', 'FaxAccount', 'Callthrough', 'HuntGroup']  
+
+  attr_accessible :name, :number, :gs_node_id, :access_authorization_user_id
+
+  has_many :call_forwards, :dependent => :destroy
+  
+  has_many :ringtones, :as => :ringtoneable, :dependent => :destroy
+  
+  belongs_to :phone_numberable, :polymorphic => true
+
+  belongs_to :gs_node
+
+  validates_uniqueness_of :number, :scope => [:phone_numberable_type, :phone_numberable_id]
+  
+  validate :validate_inbound_uniqueness
+    
+  before_save :save_value_of_to_s
+  after_create :copy_existing_call_forwards_if_necessary
+  before_validation :'parse_and_split_number!'
+  validate :validate_number, :if => Proc.new { |phone_number| STRICT_INTERNAL_EXTENSION_HANDLING && STRICT_DID_HANDLING }
+  validate :check_if_number_is_available, :if => Proc.new { |phone_number| STRICT_INTERNAL_EXTENSION_HANDLING && STRICT_DID_HANDLING }
+  
+  acts_as_list :scope => [:phone_numberable_id, :phone_numberable_type]
+
+  # Sync other nodes when this is a cluster.
+  #
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+  after_create { self.create_on_other_gs_nodes('phone_numberable', self.phone_numberable.try(:uuid)) }
+  after_destroy :destroy_on_other_gs_nodes
+  after_update { self.update_on_other_gs_nodes('phone_numberable', self.phone_numberable.try(:uuid)) }  
+
+  # State machine:
+  #
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+    
+    event :deactivate do
+      transition [:active] => :deactivated
+    end
+    
+    event :activate do
+      transition [:deactivated] => :active
+    end
+  end
+  
+  
+  def to_s
+  	parts = []
+  	parts << "+#{self.country_code}" if self.country_code
+  	parts << self.area_code if self.area_code
+  	parts << self.central_office_code if self.central_office_code
+  	parts << self.subscriber_number if self.subscriber_number
+
+  	if parts.empty?
+  		return self.number
+  	end
+  	return parts.join("-")
+  end
+  
+  # Parse a number in a tenant's context (respect the tenant's country)
+  #
+  def self.parse( number, tenant=nil )
+    number = number.to_s.gsub( /[^0-9+]/, '' )
+  
+    if tenant.class.name == 'Tenant'
+      country = tenant.country
+    else
+      tenant = nil
+      country = GemeinschaftSetup.first.try(:country)
+      country ||= Country.where(:name => "Germany").first
+    end
+  
+    parts = {
+      :country_code         => nil,
+      :area_code            => nil,
+      :central_office_code  => nil,
+      :subscriber_number    => nil,
+      :extension            => nil,
+    }
+  
+    if country
+      if ! country.international_call_prefix.blank?
+        number = number.gsub( /^#{Regexp.escape( country.international_call_prefix )}/, '+' )
+      end
+      if ! country.trunk_prefix.blank?
+        number = number.gsub( /^#{Regexp.escape( country.trunk_prefix )}/, "+#{country.country_code}" )
+      end
+    end
+  
+    if number.match( /^[+]/ )
+      parts = self.parse_international_number( number.gsub(/[^0-9]/,'') )
+      return nil if parts.nil?
+    else
+      # Check if the number is an internal extension.
+      if tenant
+        internal_extension_range = tenant.phone_number_ranges.where(:name => INTERNAL_EXTENSIONS).first
+        if internal_extension_range
+          if internal_extension_range.phone_numbers.where(:number => number).length > 0
+            parts[:extension] = number
+          end
+        end
+      end
+    
+      # Otherwise assume the number is a special number such as an emergency number.
+      if ! parts[:extension]
+        parts[:subscriber_number] = number
+      end
+    end
+  
+    # return nil if all parts are blank:
+    return nil if (
+      parts[:country_code].blank? &&
+      parts[:area_code].blank? &&
+      parts[:central_office_code].blank? &&
+      parts[:subscriber_number].blank? &&
+      parts[:extension].blank?
+    )
+    parts  # return value
+  end
+
+  def self.parse_and_format( number, tenant=nil )
+    attributes = PhoneNumber.parse(number, tenant)
+    if attributes
+      formated_number = attributes.map{|key,value| value}.delete_if{|x| x.nil?}.join('-')
+      formated_number = "+#{formated_number}" if attributes[:country_code]
+      return formated_number
+    end
+    return number
+  end
+  
+  # Parse an international number.
+  # Assumed format for +number+ is e.g. "49261200000"
+  #
+  def self.parse_international_number( number )
+    number = number.to_s.gsub( /[^0-9]/, '' )
+    
+    parts = {
+      :country_code         => nil,
+      :area_code            => nil,
+      :central_office_code  => nil,
+      :subscriber_number    => nil,
+      :extension            => nil,
+    }
+    
+    # Find country by country code:
+    country   = Country.where( :country_code => number[0, 3]).first
+  	country ||= Country.where( :country_code => number[0, 2]).first
+    country ||= Country.where( :country_code => number[0, 1]).first
+    
+    return nil if ! country  # invalid number format
+    
+    parts[:country_code] = country.country_code
+    remainder = number[ parts[:country_code].length, 999 ]  # e.g. "261200000"
+    
+    case parts[:country_code]
+      
+      when '1'
+        # Assure an NANP number
+        return nil if ! remainder.match(/[2-9]{1}[0-9]{2}[2-9]{1}[0-9]{2}[0-9]{4}/)
+
+        # Shortcut for NANPA closed dialplan:
+        parts[:area_code           ] = remainder[ 0,  3]
+        parts[:central_office_code ] = remainder[ 3,  3]
+        parts[:subscriber_number   ] = remainder[ 6,  4]      
+      else
+        # variable-length dialplan, e.g. Germany
+        
+        # Find longest area_code for the country:
+        longest_area_code = country.area_codes.order( "LENGTH(area_code) DESC" ).first
+        
+        # Find a matching area_code:
+        if longest_area_code
+          longest_area_code.area_code.length.downto(1) do |area_code_length|
+            area_code = country.area_codes.where( :area_code => remainder[ 0, area_code_length ] ).first
+            if area_code
+              parts[:area_code] = area_code.area_code
+              break
+            end
+          end
+          
+          return nil if ! parts[:area_code] # No matching area_code for the country.
+          
+          remainder = remainder.gsub( /^#{parts[:area_code]}/, '' )
+          #remainder = number[ parts[:area_code].length, 999 ]  # e.g. "200000"
+        end
+        parts[:subscriber_number] = remainder
+    end
+    
+    parts  # return value
+  end
+  
+  def parse_and_split_number!
+    if self.phone_numberable_type == 'PhoneNumberRange' && self.phone_numberable.name == INTERNAL_EXTENSIONS
+      # The parent is the PhoneNumberRange INTERNAL_EXTENSIONS. Therefor it must be an extensions.
+      #
+      self.country_code = nil
+      self.area_code = nil
+      self.subscriber_number = nil
+      self.central_office_code = nil
+      self.extension = self.number.to_s.strip
+    else
+      if self.tenant &&
+         self.tenant.phone_number_ranges.exists?(:name => INTERNAL_EXTENSIONS) && 
+         self.tenant.phone_number_ranges.where(:name => INTERNAL_EXTENSIONS).first.phone_numbers.exists?(:number => self.number)
+        self.country_code = nil
+        self.area_code = nil
+        self.subscriber_number = nil
+        self.central_office_code = nil
+        self.extension = self.number.to_s.strip         
+      else
+        parsed_number = PhoneNumber.parse( self.number )
+        if parsed_number
+          self.country_code = parsed_number[:country_code]
+          self.area_code = parsed_number[:area_code]
+          self.subscriber_number = parsed_number[:subscriber_number]
+          self.extension = parsed_number[:extension]
+          self.central_office_code = parsed_number[:central_office_code]
+      
+          self.number = self.to_s.gsub( /[^\+0-9]/, '' )
+        end
+      end
+    end
+  end
+  
+  # Find the (grand-)parent tenant of this phone number:
+  #
+  def tenant
+    #OPTIMIZE Add a tenant_id to SipAccount
+    case self.phone_numberable
+      when SipAccount
+        self.phone_numberable.tenant
+      when Conference
+        case self.phone_numberable.conferenceable
+          when Tenant
+            self.phone_numberable.conferenceable
+          when User
+            self.phone_numberable.conferenceable.current_tenant  #OPTIMIZE
+          when UserGroup
+            self.phone_numberable.conferenceable.tenant
+        end
+    end
+  end
+  
+  def move_up?
+    return self.position.to_i > PhoneNumber.where(:phone_numberable_id => self.phone_numberable_id, :phone_numberable_type => self.phone_numberable_type ).order(:position).first.position.to_i
+  end
+
+  def move_down?
+    return self.position.to_i < PhoneNumber.where(:phone_numberable_id => self.phone_numberable_id, :phone_numberable_type => self.phone_numberable_type ).order(:position).last.position.to_i
+  end
+
+  private
+  
+  def validate_number
+    if ! PhoneNumber.parse( self.number )
+      errors.add( :number, "is invalid." )
+    end
+  end
+  
+  def check_if_number_is_available
+    if self.phone_numberable_type != 'PhoneBookEntry' && self.tenant
+
+      phone_number_ranges = self.tenant.phone_number_ranges.where(
+                              :name => [INTERNAL_EXTENSIONS, DIRECT_INWARD_DIALING_NUMBERS]
+                            )
+      if !phone_number_ranges.empty?                           
+        if !PhoneNumber.where(:phone_numberable_type => 'PhoneNumberRange').
+                        where(:phone_numberable_id => phone_number_ranges).
+                        exists?(:number => self.number)                              
+           errors.add(:number, "isn't defined as an extenation or DID for the tenant '#{self.tenant}'. #{phone_number_ranges.inspect}")
+        end
+      end
+    end
+  end
+
+  def validate_inbound_uniqueness
+    if NUMBER_TYPES_INBOUND.include?(self.phone_numberable_type)
+      numbering_scope = PhoneNumber.where(:state => 'active', :number => self.number, :phone_numberable_type => NUMBER_TYPES_INBOUND)
+      if numbering_scope.where(:id => self.id).count == 0 && numbering_scope.count > 0
+        errors.add(:number, 'not unique')
+      end
+    end
+  end
+  
+  def save_value_of_to_s
+    self.value_of_to_s = self.to_s
+  end
+  
+  def copy_existing_call_forwards_if_necessary
+    if self.phone_numberable.class == SipAccount && self.phone_numberable.callforward_rules_act_per_sip_account == true
+      sip_account = SipAccount.find(self.phone_numberable)
+      if sip_account.phone_numbers.where('id != ?', self.id).count > 0
+        if sip_account.phone_numbers.where('id != ?', self.id).order(:created_at).first.call_forwards.count > 0
+          sip_account.phone_numbers.where('id != ?', self.id).first.call_forwards.each do |call_forward|
+            call_forward.set_this_callforward_rule_to_all_phone_numbers_of_the_parent_sip_account
+          end
+        end
+      end
+    end
+  end
+
+end
diff --git a/app/models/phone_number_range.rb b/app/models/phone_number_range.rb
new file mode 100644
index 0000000..2fdd9b6
--- /dev/null
+++ b/app/models/phone_number_range.rb
@@ -0,0 +1,16 @@
+class PhoneNumberRange < ActiveRecord::Base
+  attr_accessible :name, :description
+
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  belongs_to :phone_number_rangeable, :polymorphic => true
+  
+  validates_presence_of :name
+  validates_uniqueness_of :name, :scope => [:phone_number_rangeable_id, :phone_number_rangeable_type]
+  validates_inclusion_of :name, :in => [INTERNAL_EXTENSIONS, DIRECT_INWARD_DIALING_NUMBERS, SERVICE_NUMBERS]
+  validates_presence_of :phone_number_rangeable_id
+  validates_presence_of :phone_number_rangeable
+  
+  def to_s
+    name
+  end
+end
diff --git a/app/models/phone_sip_account.rb b/app/models/phone_sip_account.rb
new file mode 100644
index 0000000..449ba39
--- /dev/null
+++ b/app/models/phone_sip_account.rb
@@ -0,0 +1,17 @@
+class PhoneSipAccount < ActiveRecord::Base
+  attr_accessible :sip_account_id
+  
+  belongs_to :phone
+  belongs_to :sip_account
+  
+  validates_presence_of :phone
+  validates_presence_of :sip_account
+
+  validates_uniqueness_of :sip_account_id, :scope => :phone_id
+  
+  acts_as_list :scope => :phone
+  
+  def to_s
+    "Position #{self.position}"
+  end
+end
diff --git a/app/models/remote_gs_node/gs_cluster_sync_log_entry.rb b/app/models/remote_gs_node/gs_cluster_sync_log_entry.rb
new file mode 100644
index 0000000..843494e
--- /dev/null
+++ b/app/models/remote_gs_node/gs_cluster_sync_log_entry.rb
@@ -0,0 +1,9 @@
+# Find docu about ActiveResource at 
+# http://ofps.oreilly.com/titles/9780596521424/activeresource_id59243.html
+# test = RemoteGSNode::GcLogEntry.first.attributes.delete_if{|key, value| ['id','updated_at','created_at'].include?(key) })
+
+module RemoteGsNode
+  class GsClusterSyncLogEntry < ActiveResource::Base
+    self.site = 'http://0.0.0.0:3000'
+  end
+end
\ No newline at end of file
diff --git a/app/models/ringtone.rb b/app/models/ringtone.rb
new file mode 100644
index 0000000..36053c0
--- /dev/null
+++ b/app/models/ringtone.rb
@@ -0,0 +1,15 @@
+class Ringtone < ActiveRecord::Base
+  attr_accessible :audio, :bellcore_id
+  
+  mount_uploader :audio, AudioUploader
+  validates_presence_of :audio, :if => Proc.new{ |ringtone| ringtone.bellcore_id.blank? }
+  validates_presence_of :ringtoneable_type
+  validates_presence_of :ringtoneable_id
+  validates_presence_of :ringtoneable
+  
+  belongs_to :ringtoneable, :polymorphic => true
+
+  def to_s
+    self.bellcore_id.to_s
+  end
+end
diff --git a/app/models/sip_account.rb b/app/models/sip_account.rb
new file mode 100644
index 0000000..8459265
--- /dev/null
+++ b/app/models/sip_account.rb
@@ -0,0 +1,221 @@
+# encoding: UTF-8
+
+class SipAccount < ActiveRecord::Base
+  include ActionView::Helpers::TextHelper
+
+  attr_accessible :auth_name, :caller_name, :password, :voicemail_pin, 
+                  :tenant_id, :call_waiting, :clir, :clip_no_screening,
+                  :clip, :description, :callforward_rules_act_per_sip_account,
+                  :hotdeskable, :gs_node_id
+
+  # Associations:
+  #
+  belongs_to :sip_accountable, :polymorphic => true
+  
+  has_many :phone_sip_accounts, :uniq => true
+  has_many :phones, :through => :phone_sip_accounts
+  
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+  has_many :call_forwards, :through => :phone_numbers
+
+  belongs_to :tenant
+  belongs_to :sip_domain
+
+  has_many :softkeys, :dependent => :destroy
+
+  has_many :voicemail_messages, :foreign_key => 'username', :primary_key => 'auth_name'
+
+  has_many :call_histories, :as => :call_historyable, :dependent => :destroy
+
+  has_one :voicemail_setting, :class_name => "VoicemailSetting", :primary_key => 'auth_name', :foreign_key => 'username', :dependent => :destroy
+
+  belongs_to :gs_node
+
+  # Delegations:
+  #
+  delegate :host, :to => :sip_domain, :allow_nil => true
+  delegate :realm, :to => :sip_domain, :allow_nil => true
+
+  # Validations:
+  #
+  validates_presence_of :caller_name
+  validates_presence_of :sip_accountable
+  validates_presence_of :tenant
+  validates_presence_of :sip_domain
+  
+  validate_sip_password :password
+  
+  validates_format_of :voicemail_pin, :with => /[0-9]+/,
+    :allow_nil => true, :allow_blank => true
+  
+  validates_uniqueness_of :auth_name, :scope => :sip_domain_id
+
+  # Before and after hooks:
+  # 
+  before_save :save_value_of_to_s
+  after_save :create_voicemail_setting, :if => :'voicemail_setting == nil'
+  before_validation :find_and_set_tenant_id
+  before_validation :set_sip_domain_id
+  before_validation :convert_umlauts_in_caller_name
+  before_destroy :remove_sip_accounts_or_logout_phones
+
+  # Sync other nodes when this is a cluster.
+  #
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  after_create { self.create_on_other_gs_nodes('sip_accountable', self.sip_accountable.try(:uuid)) }
+  after_destroy :destroy_on_other_gs_nodes
+  after_update { self.update_on_other_gs_nodes('sip_accountable', self.sip_accountable.try(:uuid)) }
+
+  after_update :log_out_phone_if_not_local
+
+  def to_s
+    truncate((self.caller_name || "SipAccount ID #{self.id}"), :length => TO_S_MAX_CALLER_NAME_LENGTH) + " (#{truncate(self.auth_name, :length => TO_S_MAX_LENGTH_OF_AUTH_NAME)}@...#{self.host.split(/\./)[2,3].to_a.join('.') if self.host })"
+  end
+  
+  def call_forwarding_toggle( call_forwarding_service, to_voicemail = nil )
+    if ! self.phone_numbers.first
+      errors.add(:base, "You must provide at least one phone number")
+    end
+
+    service_id = CallForwardCase.where(:value => call_forwarding_service).first.id
+
+    call_forwarding_master = self.phone_numbers.first.call_forwards.where(:call_forward_case_id => service_id).order(:active).all(:conditions => 'source IS NULL OR source = ""').first
+    if ! call_forwarding_master
+      errors.add(:base, "No call forwarding entries found that could be toggled")
+      return false
+    end
+
+    if call_forwarding_master.active
+      call_forwarding_master.active = false
+    else
+      if call_forwarding_service = 'assistant' && call_forwarding_master.call_forwardable_type == 'HuntGroup' && call_forwarding_master.call_forwardable
+        if call_forwarding_master.call_forwardable.hunt_group_members.where(:active => true).count > 0
+          call_forwarding_master.active = true
+        else
+          call_forwarding_master.active = false
+        end
+      end
+    end
+
+    self.phone_numbers.each do |phone_number|
+      call_forwarding = phone_number.call_forwards.where(:call_forward_case_id => service_id).order(:active).all(:conditions => 'source IS NULL OR source = ""').first
+      if ! call_forwarding
+        call_forwarding = CallForward.new()
+        call_forwarding.phone_number_id = phone_number.id
+      end
+
+      if to_voicemail == nil 
+        to_voicemail = call_forwarding_master.to_voicemail
+      end
+
+      call_forwarding.call_forward_case_id = call_forwarding_master.call_forward_case_id
+      call_forwarding.timeout = call_forwarding_master.timeout
+      call_forwarding.destination = call_forwarding_master.destination
+      call_forwarding.source = call_forwarding_master.source
+      call_forwarding.depth = call_forwarding_master.depth
+      call_forwarding.active = call_forwarding_master.active
+      call_forwarding.to_voicemail = to_voicemail
+
+      if ! call_forwarding.save
+        call_forwarding.errors.messages.each_with_index do |(error_key, error_message), index|
+          errors.add(error_key, "number: #{phone_number}: #{error_message}")
+        end
+      end
+    end
+
+    if errors.empty? 
+      return call_forwarding_master
+    end
+
+    return false
+  end
+
+  def registration
+    return FreeswitchRegistration.where(:reg_user => self.auth_name).first
+  end
+
+  def call( phone_number )
+    require 'freeswitch_event'
+    return FreeswitchAPI.execute(
+      'originate', 
+      "{origination_uuid=#{UUID.new.generate},origination_caller_id_number='#{phone_number}',origination_caller_id_name='Call'}user/#{self.auth_name} #{phone_number}", 
+      true
+    );
+  end
+  
+
+  private
+      
+  def save_value_of_to_s
+    self.value_of_to_s = self.to_s
+  end
+  
+  def find_and_set_tenant_id
+      if self.new_record? and self.tenant_id != nil
+        return        
+      else
+        tenant = case self.sip_accountable_type
+          when 'Tenant'    ; sip_accountable
+          when 'UserGroup' ; sip_accountable.tenant
+          when 'User'      ; sip_accountable.try(:current_tenant) || sip_accountable.try(:tenants).try(:last)
+          else nil
+        end
+        self.tenant_id = tenant.id if tenant != nil
+      end
+  end
+  
+  def set_sip_domain_id
+    self.sip_domain_id = self.tenant.try(:sip_domain_id)
+  end
+  
+  def convert_umlauts_in_caller_name
+    if !self.caller_name.blank?
+      self.caller_name = self.caller_name.sub(/ä/,'ae').
+                              sub(/Ä/,'Ae').
+                              sub(/ü/,'ue').
+                              sub(/Ü/,'Ue').
+                              sub(/ö/,'oe').
+                              sub(/Ö/,'Oe').
+                              sub(/ß/,'ss')
+
+      self.caller_name = self.caller_name.gsub(/[^a-zA-Z0-9\-\,\:\. ]/,'_')
+    end
+  end
+
+  # Make sure that a tenant phone goes back to the tenant and doesn't
+  # get deleted with this user.
+  #
+  def remove_sip_accounts_or_logout_phones
+    self.phones.each do |phone|
+      if phone.sip_accounts.where(:sip_accountable_type => 'Tenant').count > 0
+        phone.user_logout
+      else
+        PhoneSipAccount.delete_all(:sip_account_id => self.id)
+      end
+    end
+    self.reload
+  end
+
+  # log out phone if sip_account is not on this node
+  def log_out_phone_if_not_local
+    if self.gs_node_id && ! GsNode.where(:ip_address => HOMEBASE_IP_ADDRESS, :id => self.gs_node_id).first
+      self.phones.each do |phone|
+        phone.user_logout;
+      end
+    end
+  end
+
+  def create_voicemail_setting
+    voicemail_setting = VoicemailSetting.new()
+    voicemail_setting.username = self.auth_name
+    voicemail_setting.domain = self.sip_domain.try(:host)
+    voicemail_setting.password = self.voicemail_pin
+    voicemail_setting.notify = true
+    voicemail_setting.attachment = true
+    voicemail_setting.mark_read = true
+    voicemail_setting.purge = false
+    voicemail_setting.save
+  end
+end
diff --git a/app/models/sip_domain.rb b/app/models/sip_domain.rb
new file mode 100644
index 0000000..252fe4a
--- /dev/null
+++ b/app/models/sip_domain.rb
@@ -0,0 +1,16 @@
+class SipDomain < ActiveRecord::Base
+  attr_accessible :host, :realm
+  
+  has_many :tenants, :dependent => :restrict
+  has_many :sip_accounts, :dependent => :restrict
+  
+  validates_presence_of   :host
+  validates_uniqueness_of :host, :case_sensitive => false
+  
+  validates_presence_of   :realm
+  validates_uniqueness_of :realm
+  
+  def to_s
+    self.host
+  end
+end
diff --git a/app/models/softkey.rb b/app/models/softkey.rb
new file mode 100644
index 0000000..a709036
--- /dev/null
+++ b/app/models/softkey.rb
@@ -0,0 +1,100 @@
+class Softkey < ActiveRecord::Base
+  attr_accessible :softkey_function_id, :number, :label, :call_forward_id, :uuid
+
+  belongs_to :sip_account
+  belongs_to :softkey_function
+  belongs_to :call_forward
+
+  # Any CallForward BLF must have a valid softkey_call_forward_id.
+  #
+  validates_presence_of :call_forward_id, :if => Proc.new{ |softkey| self.softkey_function_id != nil && 
+                                                                     self.softkey_function_id == SoftkeyFunction.find_by_name('call_forwarding').try(:id) }
+
+  # These functions need a number to act.
+  #
+  validates_presence_of :number, :if => Proc.new{ |softkey| self.softkey_function_id != nil &&  
+                                                            ['blf','speed_dial','dtmf','conference'].include?(softkey.softkey_function.name) }
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  acts_as_list :scope => :sip_account
+
+  before_validation :clean_up_and_leave_only_values_which_make_sense_for_the_current_softkey_function_id
+  after_validation :save_function_name_in_function, :if => Proc.new{ |softkey| self.call_forward_id.blank? }
+  after_save :resync_phone
+  after_destroy :resync_phone
+
+  def possible_blf_call_forwards
+    if self.sip_account.phone_numbers.count == 0
+      nil
+    else
+      if self.sip_account.callforward_rules_act_per_sip_account == true
+        # We pick one phone_number and display the rules of it.
+        #
+        phone_number = self.sip_account.phone_numbers.order(:number).first
+        call_forwards = self.sip_account.call_forwards.where(:phone_number_id => phone_number.id)
+      else
+        call_forwards = self.sip_account.call_forwards
+      end
+      
+      phone_numbers_ids = self.sip_account.phone_number_ids
+      phone_numbers = PhoneNumber.where(:id => phone_numbers_ids).pluck(:number)
+
+      hunt_group_ids = PhoneNumber.where(:phone_numberable_type => 'HuntGroupMember', :number => phone_numbers).
+                                   map{ |phone_number| phone_number.phone_numberable.hunt_group.id }.
+                                   uniq
+
+      call_forwards + CallForward.where(:call_forwardable_type => 'HuntGroup', :call_forwardable_id => hunt_group_ids).
+                                  where('phone_number_id NOT IN (?)', phone_numbers_ids)
+    end
+  end
+
+  def to_s
+    if (['call_forwarding'].include?(self.softkey_function.name))
+      "#{self.call_forward}"
+    else
+      if ['log_out', 'log_in'].include?(self.softkey_function.name)
+        I18n.t("softkeys.functions.#{self.softkey_function.name}")        
+      else
+  	    "#{self.softkey_function.name} : #{self.number.to_s}"
+      end
+    end
+  end
+
+  def resync_phone
+    phone_sip_account = PhoneSipAccount.find_by_sip_account_id(self.sip_account_id)
+    if phone_sip_account && phone_sip_account.phone
+      phone_sip_account.phone.resync()
+    end
+  end
+
+  def move_up?
+    return self.position.to_i > Softkey.where(:sip_account_id => self.sip_account_id ).order(:position).first.position.to_i
+  end
+
+  def move_down?
+    return self.position.to_i < Softkey.where(:sip_account_id => self.sip_account_id ).order(:position).last.position.to_i
+  end
+
+  private
+
+  def save_function_name_in_function
+    self.function = self.softkey_function.name
+  end
+
+  # Make sure that no number is set when there is no need for one.
+  # And make sure that there is no CallForward connected when not needed.
+  #
+  def clean_up_and_leave_only_values_which_make_sense_for_the_current_softkey_function_id
+    if self.softkey_function_id != nil 
+      if ['blf','speed_dial','dtmf','conference'].include?(self.softkey_function.name)
+        self.call_forward_id = nil
+      end
+      if ['call_forwarding'].include?(self.softkey_function.name)
+        self.number = nil
+      end
+    end
+  end
+
+end
diff --git a/app/models/softkey_function.rb b/app/models/softkey_function.rb
new file mode 100644
index 0000000..976827d
--- /dev/null
+++ b/app/models/softkey_function.rb
@@ -0,0 +1,13 @@
+class SoftkeyFunction < ActiveRecord::Base
+  validates_presence_of :name
+
+  validates_uniqueness_of :name
+
+  acts_as_list
+
+  default_scope order(:position)
+
+  def to_s
+    self.name
+  end
+end
diff --git a/app/models/system_message.rb b/app/models/system_message.rb
new file mode 100644
index 0000000..0d9e862
--- /dev/null
+++ b/app/models/system_message.rb
@@ -0,0 +1,7 @@
+class SystemMessage < ActiveRecord::Base
+  attr_accessible :content
+
+  belongs_to :user
+
+  validates_presence_of :content
+end
diff --git a/app/models/tenant.rb b/app/models/tenant.rb
new file mode 100644
index 0000000..6f98603
--- /dev/null
+++ b/app/models/tenant.rb
@@ -0,0 +1,243 @@
+# encoding: UTF-8
+
+class Tenant < ActiveRecord::Base
+  attr_accessible :name, :description, :sip_domain_id, :country_id, :language_id, :from_field_pin_change_email, :from_field_voicemail_email
+
+  if STRICT_INTERNAL_EXTENSION_HANDLING == true
+    attr_accessible :internal_extension_ranges
+  end
+
+  if STRICT_DID_HANDLING == true
+    attr_accessible :did_list
+  end
+
+  # Associations:
+  #
+  has_many :tenant_memberships, :dependent => :destroy
+  has_many :users, :through => :tenant_memberships, :validate => true
+  
+  has_many :user_groups, :dependent => :destroy
+  
+  has_many :phone_books, :as => :phone_bookable, :dependent => :destroy
+  has_many :phone_book_entries, :through => :phone_books
+
+  has_many :phone_number_ranges, :as => :phone_number_rangeable, :dependent => :destroy
+ 
+  has_many :phones, :as => :phoneable, :dependent => :destroy
+  has_many :users_phones, :through => :users, :source => :phones, :readonly => true
+
+  has_many :callthroughs, :dependent => :destroy
+
+  has_many :fax_accounts, :dependent => :destroy # A tenant can't have a FaxAccount by itself!
+  
+  belongs_to :country
+  belongs_to :language
+  
+  belongs_to :sip_domain
+  
+  has_many :sip_accounts, :as => :sip_accountable, :dependent => :destroy
+  has_many :users_sip_accounts, :through => :users, :source => :sip_accounts, :readonly => true
+  
+  has_many :conferences, :as => :conferenceable, :dependent => :destroy
+
+  has_many :hunt_groups, :dependent => :destroy
+  has_many :hunt_group_members, :through => :hunt_groups
+
+  has_many :automatic_call_distributors, :as => :automatic_call_distributorable, :dependent => :destroy
+  has_many :acd_agents, :through => :automatic_call_distributors
+
+  # Phone numbers of the tenant.
+  #
+  has_many :phone_number_ranges_phone_numbers, :through => :phone_number_ranges, :source => :phone_numbers, :readonly => true
+  has_many :phone_numbers, :through => :sip_accounts
+  has_many :conferences_phone_numbers, :through => :conferences, :source => :phone_numbers, :readonly => true
+  has_many :callthroughs_phone_numbers, :through => :conferences, :source => :phone_numbers, :readonly => true
+  has_many :huntgroups_phone_numbers, :through => :conferences, :source => :phone_numbers, :readonly => true
+  has_many :fax_accounts_phone_numbers, :through => :fax_accounts, :source => :phone_numbers, :readonly => true
+  
+  # Phone numbers of users of the tenant.
+  #
+  has_many :users_phone_numbers, :through => :users, :source => :phone_numbers, :readonly => true
+  has_many :user_groups_phone_numbers, :through => :users, :source => :phone_numbers, :readonly => true
+  has_many :users_conferences, :through => :users, :source => :conferences, :readonly => true
+  has_many :users_conferences_phone_numbers, :through => :users_conferences, :source => :phone_numbers, :readonly => true
+  has_many :users_fax_accounts, :through => :users, :source => :fax_accounts, :readonly => true
+  has_many :users_fax_accounts_phone_numbers, :through => :users_fax_accounts, :source => :phone_numbers, :readonly => true
+
+  # Validations:
+  #
+  validates_presence_of :name, :state, :country, :language
+  validates_length_of :name, :within => 1..255
+  validates_uniqueness_of :name
+  
+  validates_length_of :name, :within => 1..100
+
+  # Before and after hooks:
+  # 
+  after_create :create_a_default_phone_book
+
+  # State machine:
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+    
+    event :deactivate do
+      transition [:active] => :deactivated
+    end
+    
+    event :activate do
+      transition [:deactivated] => :active
+    end
+  end
+  
+  def to_s
+    name
+  end
+  
+  if STRICT_INTERNAL_EXTENSION_HANDLING == true
+    def array_of_internal_extension_numbers
+      ranges = self.internal_extension_ranges.gsub(/[^0-9\-,]/,'').gsub(/[\-]+/,'-').gsub(/[,]+/,',').split(/,/)
+      output = []
+      ranges.each do |range|
+        mini_range = range.split(/-/).map{|x| x.to_i}.sort
+        if mini_range.size == 1
+          output << mini_range[0]
+        else
+          output = output + (mini_range[0]..mini_range[1]).to_a
+        end
+        output = output.try(:flatten)
+      end    
+      output.try(:sort).try(:uniq).map{|number| number.to_s }
+    end
+
+    # Generate the internal_extensions
+    #
+    def generate_internal_extensions
+      internal_extensions = self.phone_number_ranges.find_or_create_by_name(INTERNAL_EXTENSIONS, :description => 'A list of all available internal extensions.')
+      
+      phone_number_list = Array.new
+
+      if self.array_of_internal_extension_numbers.size > 0
+        if self.country.phone_number_ranges.first.try(:phone_numbers) == nil
+          phone_number_list = self.array_of_internal_extension_numbers
+        elsif 
+          # Don't create extensions like 911, 110 or 112 (at least by default)
+          #
+          phone_number_list = (self.array_of_internal_extension_numbers - self.country.phone_number_ranges.where(:name => SERVICE_NUMBERS).first.phone_numbers.map{|entry| entry.number})
+        end
+      end
+
+      phone_number_list.each do |number|
+        internal_extensions.phone_numbers.find_or_create_by_name_and_number('Extension', number)
+      end
+    end
+      
+  end
+
+  if STRICT_DID_HANDLING == true
+    def array_of_dids_generated_from_did_list
+      numbers = self.did_list.downcase.gsub(/[^0-9,x\+]/,'').gsub(/[,]+/,',').split(/,/)
+      array_of_all_external_numbers = []
+      numbers.each do |number|
+        if number.include?('x')
+          self.array_of_internal_extension_numbers.each do |internal_extension|
+            array_of_all_external_numbers << number.gsub(/x/, "-#{internal_extension.to_s}")
+          end
+        else
+          array_of_all_external_numbers << number
+        end
+      end
+      array_of_all_external_numbers.try(:sort).try(:uniq).map{|number| number.to_s }
+    end
+
+    # Generate the external numbers (DIDs)
+    #
+    def generate_dids
+      dids = self.phone_number_ranges.find_or_create_by_name(DIRECT_INWARD_DIALING_NUMBERS, :description => 'A list of all available DIDs.')
+      self.array_of_dids_generated_from_did_list.each do |number|
+        dids.phone_numbers.find_or_create_by_name_and_number('DID', number)
+      end
+    end
+    
+  end  
+  
+  
+  # All phone_numbers which can be used
+  #
+  def internal_extensions_and_dids
+    @internal_extensions_and_dids ||= self.phone_number_ranges_phone_numbers.
+         where(:phone_numberable_type => 'PhoneNumberRange').
+         where(:phone_numberable_id => self.phone_number_ranges.
+         where(:name => [INTERNAL_EXTENSIONS, DIRECT_INWARD_DIALING_NUMBERS]).
+         map{|pnr| pnr.id })
+  end
+
+  def array_of_internal_extensions
+    @array_of_internal_extensions ||= self.phone_number_ranges_phone_numbers.
+         where(:phone_numberable_type => 'PhoneNumberRange').
+         where(:phone_numberable_id => self.phone_number_ranges.
+         where(:name => INTERNAL_EXTENSIONS).
+         map{|pnr| pnr.id }).
+         map{|phone_number| phone_number.number }.
+         sort.uniq
+  end
+
+  def array_of_dids
+    @array_of_dids ||= self.phone_number_ranges_phone_numbers.
+         where(:phone_numberable_type => 'PhoneNumberRange').
+         where(:phone_numberable_id => self.phone_number_ranges.where(:name => DIRECT_INWARD_DIALING_NUMBERS).map{|pnr| pnr.id }).
+         map{|phone_number| phone_number.to_s }.
+         sort.uniq
+  end
+
+  def array_of_assigned_phone_numbers
+    (self.phone_numbers + self.conferences_phone_numbers + 
+    self.callthroughs_phone_numbers + self.huntgroups_phone_numbers + 
+    self.fax_accounts_phone_numbers + self.users_phone_numbers + 
+    self.user_groups_phone_numbers + self.users_conferences_phone_numbers +  
+    self.users_fax_accounts_phone_numbers).
+    map{|phone_number| phone_number.number }.
+    sort.uniq
+  end
+
+  def array_of_available_internal_extensions
+    (self.array_of_internal_extensions - self.array_of_assigned_phone_numbers).sort.uniq
+  end  
+
+  def array_of_available_dids
+    (self.array_of_dids - self.array_of_assigned_phone_numbers).sort.uniq
+  end
+
+  def array_of_available_internal_extensions_and_dids
+    self.array_of_available_internal_extensions + self.array_of_available_dids
+  end
+
+  private
+  
+  # Create a public phone book for this tenant
+  def create_a_default_phone_book
+    if self.name != SUPER_TENANT_NAME
+      general_phone_book = self.phone_books.find_or_create_by_name_and_description(
+        I18n.t('phone_books.general_phone_book.name'),
+        I18n.t('phone_books.general_phone_book.description', :resource => self.to_s)
+        )
+      amooma = general_phone_book.phone_book_entries.create(
+        :organization => 'AMOOMA GmbH',
+        :is_organization => true,
+        :description => "Hersteller von Gemeinschaft. Rufen Sie uns an, falls Sie kommerziellen Support oder Consulting für Gemeinschaft benötigen.",
+        :homepage_organization => 'http://www.amooma.de',
+        :twitter_account => 'amooma_de',
+        :facebook_account => 'https://www.facebook.com/AMOOMA.GmbH',
+      )
+      amooma.phone_numbers.create(
+        :name => 'Office', 
+        :number => '+492622706480'
+      )
+      amooma.addresses.create(
+        :street => 'Bachstr. 124', 
+        :zip_code => '56566',
+        :city => 'Neuwied',
+        :country_id => Country.where(:country_code => 49).first.try(:id),
+      )
+    end
+  end
+end
diff --git a/app/models/tenant_membership.rb b/app/models/tenant_membership.rb
new file mode 100644
index 0000000..122f702
--- /dev/null
+++ b/app/models/tenant_membership.rb
@@ -0,0 +1,25 @@
+class TenantMembership < ActiveRecord::Base
+  belongs_to :tenant
+  belongs_to :user
+    
+  validates_presence_of :tenant
+  validates_presence_of :user
+  
+  after_create :set_current_tenant_if_necessary
+
+  # State Machine stuff
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+  end
+
+  private
+  # The first TenantMembership becomes the current_tenant by default.
+  #
+  def set_current_tenant_if_necessary
+    if !self.user.current_tenant
+      self.user.current_tenant = self.tenant
+      self.user.save
+    end
+  end
+
+end
diff --git a/app/models/user.rb b/app/models/user.rb
new file mode 100644
index 0000000..2d0256f
--- /dev/null
+++ b/app/models/user.rb
@@ -0,0 +1,208 @@
+require 'digest/sha2'
+
+class User < ActiveRecord::Base
+  after_create :create_a_default_phone_book, :if => :'is_native != false'
+
+  # Sync other nodes when this is a cluster.
+  #
+  after_create :create_on_other_gs_nodes
+  after_destroy :destroy_on_other_gs_nodes
+  after_update :update_on_other_gs_nodes
+  
+  attr_accessible :user_name, :email, :password, :password_confirmation, 
+                  :first_name, :middle_name, :last_name, :male,
+                  :image, :current_tenant_id, :language_id,
+                  :new_pin, :new_pin_confirmation, :send_voicemail_as_email_attachment,
+                  :importer_checksum, :gs_node_id
+  
+  attr_accessor :new_pin, :new_pin_confirmation
+  
+  before_validation {
+    # If the PIN and PIN confirmation are left blank in the GUI
+    # then the user/admin does not want to change the PIN.
+    if self.new_pin.blank? && self.new_pin_confirmation.blank?
+      self.new_pin              = nil
+      self.new_pin_confirmation = nil
+    end
+  }
+  
+  validates_length_of [:new_pin, :new_pin_confirmation],
+    :minimum => MINIMUM_PIN_LENGTH, :maximum => MAXIMUM_PIN_LENGTH,
+    :allow_blank => true, :allow_nil => true
+  validates_format_of [:new_pin, :new_pin_confirmation],
+    :with => /^[0-9]+$/,
+    :allow_blank => true, :allow_nil => true,
+    :message => "must be numeric."
+  
+  validates_confirmation_of :new_pin, :if => :'pin_changed?'
+  before_save :hash_new_pin, :if => :'pin_changed?'
+  
+  has_secure_password
+  
+  validates_presence_of :password, :password_confirmation, :on => :create, :if => :'password_digest.blank?'
+  validates_presence_of :email
+  validates_presence_of :last_name
+  validates_presence_of :first_name
+  validates_presence_of :user_name
+  
+  validates_uniqueness_of :user_name, :case_sensitive => false
+  validates_uniqueness_of :email, :allow_nil => true, :case_sensitive => false
+  
+  validates_length_of :user_name, :within => 0..50
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  # Associations:
+  #
+  has_many :tenant_memberships, :dependent => :destroy
+  has_many :tenants, :through => :tenant_memberships
+  
+  has_many :user_group_memberships, :dependent => :destroy, :uniq => true
+  has_many :user_groups, :through => :user_group_memberships
+  
+  has_many :phone_books, :as => :phone_bookable, :dependent => :destroy
+  has_many :phone_book_entries, :through => :phone_books
+  
+  has_many :phones, :as => :phoneable
+  has_many :sip_accounts, :as => :sip_accountable, :dependent => :destroy
+  has_many :phone_numbers, :through => :sip_accounts
+  
+  has_many :conferences, :as => :conferenceable, :dependent => :destroy
+  
+  has_many :fax_accounts, :as => :fax_accountable, :dependent => :destroy
+
+  has_many :system_messages, :dependent => :destroy
+
+  has_many :auto_destroy_access_authorization_phone_numbers, :class_name => 'PhoneNumber', :foreign_key => 'access_authorization_user_id', :dependent => :destroy
+  
+  belongs_to :current_tenant, :class_name => 'Tenant'
+  validates_presence_of :current_tenant, :if => Proc.new{ |user| user.current_tenant_id }
+
+  belongs_to :language
+  validates_presence_of :language_id
+  validates_presence_of :language
+  
+  validate :current_tenant_is_included_in_tenants, :if => Proc.new{ |user| user.current_tenant_id }
+
+  belongs_to :gs_node
+  
+  # Avatar like photo  
+  mount_uploader :image, ImageUploader  
+
+  before_save :format_email_and_user_name
+
+  before_destroy :destroy_or_logout_phones
+
+  def destroy
+    clean_whitelist_entries
+    super
+  end
+
+  def pin_changed?
+    ! @new_pin.blank?
+  end
+  
+  def sip_domain
+    if self.current_tenant
+      return self.current_tenant.sip_domain
+    end
+    return nil
+  end
+  
+  def to_s
+    max_first_name_length = 10
+    max_last_name_length = 20
+    if self.first_name.blank?
+      self.last_name.strip
+    else  
+      "#{self.first_name.strip} #{self.last_name.strip}"
+    end
+  end
+  
+  def self.find_user_by_phone_number( number, tenant )
+    tenant = Tenant.where( :id => tenant.id ).first
+    if tenant
+      if tenant.sip_domain
+        user = tenant.sip_domain.sip_accounts.
+          joins(:phone_numbers).
+          where(:phone_numbers => { :number => number }).
+          first.
+          try(:sip_accountable)
+        if user.class.name == 'User'
+          return user
+        end
+      end
+    end
+    return nil
+  end
+  
+  def authenticate_by_pin?( entered_pin )
+    self.pin_hash == Digest::SHA2.hexdigest( "#{self.pin_salt}#{entered_pin}" )
+  end
+  
+
+  private
+  
+  def hash_new_pin
+    if @new_pin \
+    && @new_pin_confirmation \
+    && @new_pin_confirmation == @new_pin
+      self.pin_salt = SecureRandom.base64(8)
+      self.pin_hash = Digest::SHA2.hexdigest(self.pin_salt + @new_pin)
+    end
+  end
+  
+  def format_email_and_user_name
+    self.email = self.email.downcase.strip if !self.email.blank?
+    self.user_name = self.user_name.downcase.strip if !self.user_name.blank?
+  end
+  
+  # Create a personal phone book for this user:
+  def create_a_default_phone_book
+    private_phone_book = self.phone_books.find_or_create_by_name_and_description(
+      I18n.t('phone_books.private_phone_book.name', :resource => self.to_s),
+      I18n.t('phone_books.private_phone_book.description')
+    )
+  end
+  
+  # Check if a current_tenant_id is possible tenant_membership wise.
+  def current_tenant_is_included_in_tenants
+    if !self.tenants.include?(Tenant.find(self.current_tenant_id))
+      errors.add(:current_tenant_id, "is not possible (no TenantMembership)")
+    end
+  end
+
+  # Make sure that there are no whitelist entries with phone_numbers of 
+  # a just destroyed user.
+  #
+  def clean_whitelist_entries
+    phone_numbers = PhoneNumber.where( :phone_numberable_type => 'Whitelist').
+                                where( :number => self.phone_numbers.map{ |x| x.number } )
+    phone_numbers.each do |phone_number|
+      if phone_number.phone_numberable.whitelistable.class == Callthrough
+        whitelist = Whitelist.find(phone_number.phone_numberable)
+        phone_number.destroy
+        if whitelist.phone_numbers.count == 0
+          # Very lickly that this Whitelist doesn't make sense any more.
+          #
+          whitelist.destroy
+        end
+      end
+    end
+  end
+
+  # Make sure that a tenant phone goes back to the tenant and doesn't
+  # get deleted with this user.
+  #
+  def destroy_or_logout_phones
+    self.phones.each do |phone|
+      if phone.sip_accounts.where(:sip_accountable_type => 'Tenant').count > 0
+        phone.user_logout
+      else
+        phone.destroy
+      end
+    end
+  end
+
+end
diff --git a/app/models/user_group.rb b/app/models/user_group.rb
new file mode 100644
index 0000000..44f2fd8
--- /dev/null
+++ b/app/models/user_group.rb
@@ -0,0 +1,33 @@
+class UserGroup < ActiveRecord::Base
+  attr_accessible :name, :description
+  
+  belongs_to :tenant
+  
+  validates_presence_of :name
+  validates_uniqueness_of :name, :scope => :tenant_id
+  
+  validates_presence_of :tenant
+  
+  validates_length_of :name, :within => 1..50
+  
+  has_many :user_group_memberships, :dependent => :destroy, :uniq => true
+  has_many :users, :through => :user_group_memberships
+
+  has_many :gui_function_memberships, :dependent => :destroy
+  has_many :gui_functions, :through => :gui_function_memberships
+
+  has_many :phone_books, :as => :phone_bookable, :dependent => :destroy
+  has_many :phone_book_entries, :through => :phone_books
+    
+  has_many :sip_accounts, :as => :sip_accountable, :dependent => :destroy
+  
+  has_many :conferences, :as => :conferenceable, :dependent => :destroy
+  
+  has_many :fax_accounts, :as => :fax_accountable, :dependent => :destroy
+  
+  acts_as_list :scope => :tenant_id
+  
+  def to_s
+    name
+  end
+end
diff --git a/app/models/user_group_membership.rb b/app/models/user_group_membership.rb
new file mode 100644
index 0000000..18a8d48
--- /dev/null
+++ b/app/models/user_group_membership.rb
@@ -0,0 +1,26 @@
+class UserGroupMembership < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :user_group
+  
+  validates_uniqueness_of :user_id, :scope => :user_group_id
+  validates_presence_of :user
+  validates_presence_of :user_group
+  
+  validate :user_belongs_to_the_tenant_of_the_user_group
+  
+  # State Machine stuff
+  default_scope where(:state => 'active')
+  state_machine :initial => :active do
+  end
+
+  def to_s
+    "#{self.user} / #{self.user_group}"
+  end
+
+  private
+  def user_belongs_to_the_tenant_of_the_user_group
+    if !self.user_group.tenant.users.include?(self.user)
+      errors.add(:user_id, "not a member of the tenant which this group belongs to")
+    end
+  end
+end
diff --git a/app/models/voicemail_message.rb b/app/models/voicemail_message.rb
new file mode 100644
index 0000000..91ba457
--- /dev/null
+++ b/app/models/voicemail_message.rb
@@ -0,0 +1,52 @@
+class VoicemailMessage < ActiveRecord::Base
+  self.table_name = 'voicemail_msgs'
+  self.primary_key = 'uuid'
+
+#  belongs_to :sip_account, :foreign_key => 'username', :primary_key => 'auth_name', :readonly => true
+  # Prevent objects from being destroyed
+  def before_destroy
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Prevent objects from being deleted
+  def self.delete_all
+    raise ActiveRecord::ReadOnlyRecord
+  end
+
+  # Delete Message on FreeSWITCH over EventAPI
+  def delete
+    require 'freeswitch_event'
+    result = FreeswitchAPI.execute('vm_delete', "#{self.username}@#{self.domain} #{self.uuid}");
+  end
+
+  # Alias for delete
+  def destroy
+    self.delete
+  end
+
+  # Mark Message read
+  def mark_read(mark_read_or_unread = true)
+    read_status = mark_read_or_unread ? 'read' : 'unread'
+    require 'freeswitch_event'
+    result = FreeswitchAPI.execute('vm_read', "#{self.username}@#{self.domain} #{read_status} #{self.uuid}");
+  end
+
+  def format_date(epoch, date_format = '%m/%d/%Y %H:%M', date_today_format = '%H:%M')
+    if epoch && epoch > 0
+      time = Time.at(epoch)
+      if time.strftime('%Y%m%d') == Time.now.strftime('%Y%m%d')
+        return time.in_time_zone.strftime(date_today_format)
+      end
+      return time.in_time_zone.strftime(date_format)
+    end
+  end
+
+  def display_duration
+    if self.message_len.to_i > 0
+      minutes = (self.message_len / 1.minutes).to_i
+      seconds = self.message_len - minutes.minutes.seconds
+      return '%i:%02i' % [minutes, seconds]
+    end
+  end
+
+end
diff --git a/app/models/voicemail_setting.rb b/app/models/voicemail_setting.rb
new file mode 100644
index 0000000..a8bb304
--- /dev/null
+++ b/app/models/voicemail_setting.rb
@@ -0,0 +1,12 @@
+class VoicemailSetting < ActiveRecord::Base
+  self.table_name = 'voicemail_prefs'
+  self.primary_key = 'username'
+
+  attr_accessible :username, :domain, :name_path, :greeting_path, :password, :notify, :attachment, :mark_read, :purge, :sip_account
+
+  has_one :sip_account, :foreign_key => 'auth_name'
+
+  validates_presence_of :username
+  validates_presence_of :domain
+  validates :username, :uniqueness => {:scope => :domain}
+end
diff --git a/app/models/whitelist.rb b/app/models/whitelist.rb
new file mode 100644
index 0000000..8303728
--- /dev/null
+++ b/app/models/whitelist.rb
@@ -0,0 +1,23 @@
+class Whitelist < ActiveRecord::Base
+  attr_accessible :name, :phone_numbers_attributes, :uuid
+
+  belongs_to :whitelistable, :polymorphic => true
+  
+  # These are the phone_numbers for this whitelist.
+  #
+  has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
+
+  accepts_nested_attributes_for :phone_numbers, 
+                                :reject_if => lambda { |phone_number| phone_number[:number].blank? }, 
+                                :allow_destroy => true
+
+  acts_as_list :scope => [ :whitelistable_type, :whitelistable_id ]
+
+  validates_presence_of :uuid
+  validates_uniqueness_of :uuid
+
+  def to_s
+    self.name || I18n.t('whitelists.name') + ' ID ' + self.id.to_s
+  end
+
+end