Contents

module Rooler
  class LiquidInspector
    
    def initialize(klass)
      @klass = klass
      @klass_name = klass.to_s.downcase
    end
    
    def tree
      add_liquid_methods_as_nodes(::Tree::TreeNode.new(@klass.to_s.downcase), @klass_name)
    end

    private
      
    # Recursive method. Infers a class name using the name of the provided TreeNode. Creates nodes any liquid methods belonging to that class. If any of those nodes
    # are also associations, it calls itself on that node.
    def add_liquid_methods_as_nodes(tree, klass_name)
      klass = klass_name.to_s.classify.constantize
      add_nodes_to_tree(tree, liquid_methods(klass))
      associations(klass).each do |association|
        add_liquid_methods_as_nodes(tree[association.name.to_sym], association.class_name)
      end
      return tree
    end
    
    #iterate over nodes and add them to the tree. the << operator does not accept an array :(
    def add_nodes_to_tree(tree, nodes)
      nodes.each {|node| tree << ::Tree::TreeNode.new(node)}
    end
    
    #get associations haveing the same name as any liquid methods
    def associations(klass)
      liquid_methods = liquid_methods(klass)
      return klass.reflect_on_all_associations.select {|k| liquid_methods.include?(k.name.to_sym)}
    end
    
    
    def liquid_methods(klass)
      if klass.const_defined?('LiquidDropClass')
        return klass::LiquidDropClass.public_instance_methods.map(&:to_sym) - ::Liquid::Drop.public_instance_methods.map(&:to_sym)
      else
        return []
      end
    end
    
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
rooler-0.0.9	app/models/rooler/liquid_inspector.rb
rooler-0.0.8	app/models/rooler/liquid_inspector.rb