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class GenericFile < ActiveRecord::Base
FILE_TYPES = %w(pdf ps jpg gif png tif wav mp3)
CATEGORIES = %w(file document image greeting recording)
attr_accessible :name, :file, :file_type, :category, :owner_id, :owner_type
mount_uploader :file, GenericFileUploader
belongs_to :owner, :polymorphic => true
validates :name,
:presence => true,
:uniqueness => {:scope => [:owner_id, :owner_type]}
validates :file,
:presence => true
before_save :determine_file_type
def to_s
self.name
end
def store_dir
"/var/opt/gemeinschaft/generic_files/#{self.id.to_i}"
end
def mime_type
return GenericFile.mime_type(self.file.to_s)
end
def self.mime_type(file_name)
mime_type = `file -b --mime-type "#{file_name}"`.strip
if mime_type.blank?
mime_type = MIME::Types.type_for(file_name).first.to_s
end
return mime_type
end
def file_size
if self.file
return File.size(self.file.to_s)
else
return 0
end
end
def file_extension
mime_type = Mime::LOOKUP[self.file_type]
if mime_type.class == Mime::Type
return mime_type.symbol
end
end
private
def determine_file_type
if self.file_changed?
self.file_type = self.mime_type
end
end
end
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