summaryrefslogtreecommitdiff
path: root/misc/freeswitch/scripts/dialplan/router.lua
diff options
context:
space:
mode:
Diffstat (limited to 'misc/freeswitch/scripts/dialplan/router.lua')
-rw-r--r--misc/freeswitch/scripts/dialplan/router.lua187
1 files changed, 187 insertions, 0 deletions
diff --git a/misc/freeswitch/scripts/dialplan/router.lua b/misc/freeswitch/scripts/dialplan/router.lua
new file mode 100644
index 0000000..7e64d7b
--- /dev/null
+++ b/misc/freeswitch/scripts/dialplan/router.lua
@@ -0,0 +1,187 @@
+-- Gemeinschaft 5 module: call router class
+-- (c) AMOOMA GmbH 2013
+--
+
+module(...,package.seeall)
+
+Router = {}
+
+-- create route object
+function Router.new(self, arg)
+ arg = arg or {}
+ object = arg.object or {}
+ setmetatable(object, self);
+ self.__index = self;
+ self.class = 'router';
+ self.log = arg.log;
+ self.database = arg.database;
+ self.routes = arg.routes or {};
+ self.caller = arg.caller;
+ self.variables = arg.variables or {};
+ return object;
+end
+
+
+function Router.read_table(self, table_name)
+ local routing_table = {};
+
+ local sql_query = 'SELECT * \
+ FROM `call_routes` `a` \
+ JOIN `route_elements` `b` ON `a`.`id` = `b`.`call_route_id`\
+ WHERE `a`.`routing_table` = "' .. table_name .. '" \
+ ORDER BY `a`.`position`, `b`.`position`';
+
+ local last_id = 0;
+ self.database:query(sql_query, function(route)
+ if last_id ~= tonumber(route.call_route_id) then
+ last_id = tonumber(route.call_route_id);
+ table.insert(routing_table, {id = route.call_route_id, name = route.name, endpoint_type = route.endpoint_type , endpoint_id = route.endpoint_id, elements = {} });
+ end
+
+ table.insert(routing_table[#routing_table].elements, {
+ var_in = route.var_in,
+ var_out = route.var_out,
+ pattern = route.pattern,
+ replacement = route.replacement,
+ action = route.action,
+ mandatory = common.str.to_b(route.mandatory),
+ });
+ end);
+
+ return routing_table;
+end
+
+
+function Router.expand_variables(self, line, variables)
+ return (line:gsub('{([%a%d%._]+)}', function(captured)
+ return common.str.try(variables, captured) or '';
+ end))
+end
+
+
+function Router.element_match(self, pattern, search_string, replacement)
+ local success, result = pcall(string.find, search_string, pattern);
+
+ if not success then
+ self.log:error('ELEMENT_MATCH - table error - pattern: ', pattern, ', search_string: ', search_string);
+ elseif result then
+ return true, search_string:gsub(pattern, self:expand_variables(replacement, self.variables));
+ end
+
+ return false;
+end
+
+
+function Router.element_match_group(self, pattern, groups, replacement, use_key)
+ if type(groups) ~= 'table' then
+ return false;
+ end
+
+ for key, value in pairs(groups) do
+ if use_key then
+ value = key;
+ end
+ result, replaced_value = self:element_match(pattern, tostring(value), replacement);
+ if result then
+ return true, replaced_value;
+ end
+ end
+end
+
+
+function Router.route_match(self, route)
+ local destination = {
+ gateway = 'gateway' .. route.endpoint_id,
+ ['type'] = route.endpoint_type,
+ id = route.endpoint_id,
+ channel_variables = {}
+ };
+
+ local route_matches = false;
+
+ for index=1, #route.elements do
+ local result = false;
+ local replacement = nil;
+
+ local element = route.elements[index];
+
+ if element.action ~= 'none' then
+ if common.str.blank(element.var_in) or common.str.blank(element.pattern) and element.action == 'set' then
+ result = true;
+ replacement = self:expand_variables(element.replacement, self.variables);
+ else
+ local command, variable_name = common.str.partition(element.var_in, ':');
+
+ if not command or not variable_name or command == 'var' then
+ local search_string = tostring(common.str.try(self.caller, element.var_in))
+ result, replacement = self:element_match(tostring(element.pattern), tostring(search_string), tostring(element.replacement));
+ elseif command == 'key' or command == 'val' then
+ local groups = common.str.try(self.caller, variable_name);
+ result, replacement = self:element_match_group(tostring(element.pattern), groups, tostring(element.replacement), command == 'key');
+ elseif command == 'chv' then
+ local search_string = self.caller:to_s(variable_name);
+ result, replacement = self:element_match(tostring(element.pattern), search_string, tostring(element.replacement));
+ elseif command == 'hdr' then
+ local search_string = self.caller:to_s('sip_h_' .. variable_name);
+ result, replacement = self:element_match(tostring(element.pattern), search_string, tostring(element.replacement));
+ end
+ end
+
+ if element.action == 'not_match' then
+ result = not result;
+ end
+
+ if not result then
+ if element.mandatory then
+ return false;
+ end
+ else
+ if not common.str.blank(element.var_out) then
+ local command, variable_name = common.str.partition(element.var_out, ':');
+ if not command or not variable_name or command == 'var' then
+ destination[element.var_out] = replacement;
+ elseif command == 'chv' then
+ destination.channel_variables[variable_name] = replacement;
+ elseif command == 'hdr' then
+ destination.channel_variables['sip_h_' .. variable_name] = replacement;
+ end
+ end
+
+ if element.action == 'match' or element.action == 'not_match' then
+ route_matches = true;
+ end
+ end
+ end
+ end
+
+ if route_matches then
+ return destination;
+ end;
+
+ return nil;
+end
+
+
+function Router.route_run(self, table_name, find_first)
+ local routing_table = self:read_table(table_name);
+ local routes = {};
+
+ if type(routing_table) == 'table' then
+ for index=1, #routing_table do
+ local route = self:route_match(routing_table[index]);
+ if route then
+ table.insert(routes, route);
+ self.log:info('ROUTE ', #routes,' - ', table_name,'=', routing_table[index].id, '/', routing_table[index].name, ', destination: ', route.type, '=', route.id, ', destination_number: ', route.destination_number);
+ if find_first then
+ return route;
+ end
+ else
+ self.log:debug('ROUTE_NO_MATCH - ', table_name, '=', routing_table[index].id, '/', routing_table[index].name);
+ end
+ end
+ end
+
+ if not find_first then
+ return routes;
+ end
+end