class Topic < ActiveRecord::Base include TopicsHelper belongs_to :user has_many :synapses1, :class_name => 'Synapse', :foreign_key => 'node1_id' has_many :synapses2, :class_name => 'Synapse', :foreign_key => 'node2_id' has_many :topics1, :through => :synapses2, :source => :topic1 has_many :topics2, :through => :synapses1, :source => :topic2 has_many :mappings has_many :maps, :through => :mappings def synapses synapses1 + synapses2 end def relatives topics1 + topics2 end belongs_to :metacode def topic_autocomplete_method "Get: #{self.name}" end # has no viewable synapses helper function def has_viewable_synapses(current) result = false self.synapses.each do |synapse| if synapse.authorize_to_view(current) result = true end end return result end ###### JSON ###### def self_as_json Jbuilder.encode do |json| @inmaps = Array.new self.maps.each do |map| @inmaps.push(map.id) end @topicdata = Hash.new @topicdata['$desc'] = self.desc @topicdata['$link'] = self.link @topicdata['$metacode'] = self.metacode.name @topicdata['$inmaps'] = @inmaps @topicdata['$userid'] = self.user.id @topicdata['$username'] = self.user.name json.data @topicdata json.id self.id json.name self.name end end def selfonmap_as_json(mapid) Jbuilder.encode do |json| @inmaps = Array.new self.maps.each do |map| @inmaps.push(map.id) end @topicdata = Hash.new @topicdata['$desc'] = self.desc @topicdata['$link'] = self.link @topicdata['$metacode'] = self.metacode.name @topicdata['$inmaps'] = @inmaps @topicdata['$userid'] = self.user.id @topicdata['$username'] = self.user.name @mapping = Mapping.find_by_topic_id_and_map_id(self.id,mapid) @topicdata['$xloc'] = @mapping.xloc @topicdata['$yloc'] = @mapping.yloc @topicdata['$mappingid'] = @mapping.id json.data @topicdata json.id self.id json.name self.name end end #build a json object of everything connected to a specified node def network_as_json(current) Jbuilder.encode do |json| @topics = network(self,nil,4) if @topics.count > 1 json.array!(@topics.delete_if{|topic| (not topic.authorize_to_view(current)) || (not topic.has_viewable_synapses(current))}) do |topic| json.adjacencies topic.synapses1.delete_if{|synapse| (not @topics.include?(synapse.topic2)) || (not synapse.authorize_to_view(current)) || (not synapse.topic2.authorize_to_view(current)) } do |json, synapse| json.nodeTo synapse.node2_id json.nodeFrom synapse.node1_id @synapsedata = Hash.new @synapsedata['$desc'] = synapse.desc @synapsedata['$showDesc'] = false @synapsedata['$category'] = synapse.category @synapsedata['$id'] = synapse.id @synapsedata['$userid'] = synapse.user.id @synapsedata['$username'] = synapse.user.name @synapsedata['$direction'] = [synapse.node1_id.to_s(), synapse.node2_id.to_s()] json.data @synapsedata end @inmaps = Array.new topic.maps.each do |map| @inmaps.push(map.id) end @topicdata = Hash.new @topicdata['$desc'] = topic.desc @topicdata['$link'] = topic.link @topicdata['$metacode'] = topic.metacode.name @topicdata['$inmaps'] = @inmaps @topicdata['$userid'] = topic.user.id @topicdata['$username'] = topic.user.name json.data @topicdata json.id topic.id json.name topic.name end elsif @topics.count == 1 json.array!(@topics) do |topic| @inmaps = Array.new topic.maps.each do |map| @inmaps.push(map.id) end @topicdata = Hash.new @topicdata['$desc'] = topic.desc @topicdata['$link'] = topic.link @topicdata['$metacode'] = topic.metacode.name @topicdata['$inmaps'] = @inmaps @topicdata['$userid'] = topic.user.id @topicdata['$username'] = topic.user.name json.data @topicdata json.id topic.id json.name topic.name end end end end ##### PERMISSIONS ###### scope :visibleToUser, lambda { |current, user| if user != nil if user != current Topic.find_all_by_user_id_and_permission(user.id, "commons") | Topic.find_all_by_user_id_and_permission(user.id, "public") elsif user == current Topic.find_all_by_user_id_and_permission(user.id, "commons") | Topic.find_all_by_user_id_and_permission(user.id, "public") | current.topics.where(:permission => "private") end elsif (current != nil && user == nil) Topic.find_all_by_permission("commons") | Topic.find_all_by_permission("public") | current.topics.where(:permission => "private") elsif (current == nil) Topic.find_all_by_permission("commons") | Topic.find_all_by_permission("public") end } # returns false if user not allowed to 'show' Topic, Synapse, or Map def authorize_to_show(user) if (self.permission == "private" && self.user != user) return false end return self end # returns false if user not allowed to 'edit' Topic, Synapse, or Map def authorize_to_edit(user) if (self.permission == "private" && self.user != user) return false elsif (self.permission == "public" && self.user != user) return false end return self end # returns Boolean if user allowed to view Topic, Synapse, or Map def authorize_to_view(user) if (self.permission == "private" && self.user != user) return false end return true end # returns Boolean based on whether user has permissions to edit or not def authorize_linkto_edit(user) if (self.user == user) return true elsif (self.permission == "commons") return true end return false end end