metamaps--metamaps/app/models/synapse.rb

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class Synapse < ActiveRecord::Base
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belongs_to :user
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belongs_to :topic1, :class_name => "Topic", :foreign_key => "node1_id"
belongs_to :topic2, :class_name => "Topic", :foreign_key => "node2_id"
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has_many :mappings
has_many :maps, :through => :mappings
def user_name
self.user.name
end
def user_image
self.user.image.url
end
def as_json(options={})
super(:methods =>[:user_name, :user_image])
end
# sends push updates through redis to websockets for realtime updates
def message action, origin_user_id
return if self.permission == "private" and action == "create"
#get array of all maps topic appears in
@maps = self.maps
#sends update to all maps that topic appears in who have realtime on
@maps.each do |map|
msg = { origin: origin_user_id,
mapid: map.id,
resource: 'Synapse',
action: action,
id: self.id,
obj: self.self_as_json.html_safe }
$redis.publish 'maps', msg.to_json
end
end
##### PERMISSIONS ######
# 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
end