metamaps--metamaps/app/models/item.rb

150 lines
4.4 KiB
Ruby
Raw Normal View History

class Item < ActiveRecord::Base
include ItemsHelper
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 :items1, :through => :synapses2, :source => :item1
has_many :items2, :through => :synapses1, :source => :item2
has_many :mappings
has_many :maps, :through => :mappings
def synapses
synapses1 + synapses2
end
def relatives
items1 + items2
end
belongs_to :item_category
# 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 ######
2012-10-19 04:06:16 +00:00
def self_as_json
Jbuilder.encode do |json|
2012-10-19 04:06:16 +00:00
@itemdata = Hash.new
@itemdata['$desc'] = self.desc
@itemdata['$link'] = self.link
@itemdata['$itemcatname'] = self.item_category.name
@itemdata['$userid'] = self.user.id
@itemdata['$username'] = self.user.name
2012-10-19 04:06:16 +00:00
json.data @itemdata
json.id self.id
json.name self.name
2012-10-19 04:06:16 +00:00
end
end
#build a json object of everything connected to a specified node
def network_as_json(current)
2012-10-19 04:06:16 +00:00
Jbuilder.encode do |json|
@items = network(self,nil)
2012-10-19 04:06:16 +00:00
if @items.count > 1
json.array!(@items.delete_if{|item| (not item.authorize_to_view(current)) || (not item.has_viewable_synapses(current))}) do |item|
json.adjacencies item.synapses2.delete_if{|synapse| (not @items.include?(synapse.item1)) || (not synapse.authorize_to_view(current)) || (not synapse.item1.authorize_to_view(current)) } do |json, synapse|
json.nodeTo synapse.node1_id
json.nodeFrom synapse.node2_id
@synapsedata = Hash.new
@synapsedata['$desc'] = synapse.desc
@synapsedata['$category'] = synapse.category
@synapsedata['$userid'] = synapse.user.id
@synapsedata['$username'] = synapse.user.name
json.data @synapsedata
end
@itemdata = Hash.new
@itemdata['$desc'] = item.desc
@itemdata['$link'] = item.link
@itemdata['$itemcatname'] = item.item_category.name
@itemdata['$userid'] = item.user.id
@itemdata['$username'] = item.user.name
json.data @itemdata
json.id item.id
json.name item.name
2012-10-19 04:06:16 +00:00
end
elsif @items.count == 1
json.array!(@items) do |item|
@itemdata = Hash.new
@itemdata['$desc'] = item.desc
@itemdata['$link'] = item.link
@itemdata['$itemcatname'] = item.item_category.name
@itemdata['$userid'] = item.user.id
@itemdata['$username'] = item.user.name
json.data @itemdata
json.id item.id
json.name item.name
end
end
2012-10-19 04:06:16 +00:00
end
end
##### PERMISSIONS ######
scope :visibleToUser, lambda { |current, user|
if user != nil
if user != current
Item.find_all_by_user_id_and_permission(user.id, "commons") | Item.find_all_by_user_id_and_permission(user.id, "public")
elsif user == current
Item.find_all_by_user_id_and_permission(user.id, "commons") | Item.find_all_by_user_id_and_permission(user.id, "public") | current.items.where(:permission => "private")
end
elsif (current != nil && user == nil)
Item.find_all_by_permission("commons") | Item.find_all_by_permission("public") | current.items.where(:permission => "private")
elsif (current == nil)
Item.find_all_by_permission("commons") | Item.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