metamaps--metamaps/app/helpers/items_helper.rb

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module ItemsHelper
#find all nodes in any given nodes network
def network(node, array, count)
# recurse starting with a node to find all connected nodes and return an array of items that constitutes the starting nodes network
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# if the array of nodes is empty initialize it
if array.nil?
array = Array.new
end
# add the node to the array
array.push(node)
if count == 0
return array
end
count = count - 1
# check if each relative is already in the array and if not, call the network function again
if not node.relatives.empty?
if (node.relatives-array).empty?
return array
else
(node.relatives-array).each do |relative|
array = (array | network(relative, array, count))
end
return array
end
elsif node.relatives.empty?
return array
end
end
#return a json object containing all of a users added synapses
def synapses_as_json(current, synapses)
Jbuilder.encode do |json|
@items = Array.new
synapses.each do |synapse|
@items.push(synapse.item1) if (not @items.include?(synapse.item1)) && synapse.item1.authorize_to_view(current)
@items.push(synapse.item2) if (not @items.include?(synapse.item2)) && synapse.item2.authorize_to_view(current)
end
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json.array!(@items) do |item|
json.adjacencies item.synapses2.delete_if{|synapse| not @items.include?(Item.find_by_id(synapse.node1_id))} do |json, synapse|
json.nodeTo synapse.node1_id
json.nodeFrom synapse.node2_id
@synapsedata = Hash.new
@synapsedata['$desc'] = synapse.desc
@synapsedata['$category'] = synapse.category
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['$username'] = item.user.name
json.data @itemdata
json.id item.id
json.name item.name
end
end
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end
def all_as_json(current)
Jbuilder.encode do |json|
@items = Item.visibleToUser(current, nil)
@synapses = Synapse.visibleToUser(current, nil)
json.array!(@items) do |item|
json.adjacencies item.synapses2.delete_if{|synapse| (not @items.include?(Item.find_by_id(synapse.node1_id))) || (not @synapses.include?(synapse))} do |json, synapse|
json.nodeTo synapse.node1_id
json.nodeFrom synapse.node2_id
@synapsedata = Hash.new
@synapsedata['$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
end
end
end
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end