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+##

+# Flattens the icons object to a one-dimensional array of possible search terms.

+

+require 'set'

+

+module Jekyll

+  module FlattenArray

+    def flattenIconFilters(icons)

+      flattened = Set.new

+      icons.each do |icon|

+        toAdd = []

+

+        toAdd.push(icon["class"].downcase) # Add class as a filter value

+

+        # Add any existing aliases as a filter value

+        if not icon["aliases"].nil?

+          icon["aliases"].each do |iconAlias|

+            toAdd.push(iconAlias.downcase)

+          end

+        end

+

+        # Add any existing filters as a filter value

+        if not icon["filter"].nil?

+          icon["filter"].each do |iconFilter|

+            toAdd.push(iconFilter.downcase)

+          end

+        end

+        flattened.merge(toAdd)

+

+        print toAdd if toAdd.include? true

+        print toAdd if toAdd.include? false

+      end

+      return flattened.to_a # .to_a because we can't jsonify a <Set>

+    end

+  end

+end

+

+Liquid::Template.register_filter(Jekyll::FlattenArray)