data.rb

def construct_concept(concept)
	h = {}
	c = Hash[*concept.to_a.first]
	c['paths'] = [[Hash[*concept.to_a.first]]]
	h[concept['id']] = c
	h
end

def parent_child_concepts(concepts)
	pc = {}
	pc[:parent] = Hash[*concepts.first]
	pc[:children] = concepts.values_at('children').flatten.map {|child| parent_child_concepts(child)} || []
	pc
end

def add_parent_child_paths(parent_hash,children_array)
	h = {}
	parent_hash.each do |parent_key,parent_value|
		h[parent_key] = parent_value
		children_array.each do |child|
			child.each do |k,v|
				h[k] = v
				h[k]['paths'].map {|path| path.unshift({'id' => parent_key})}
			end
		end
	end
	h
end

def build_concept_data(concepts)
	#{"id"=>"apple", "children"=>[{"id"=>"ipad"}]}
	parsed_concepts = parent_child_concepts(concepts)
	parent = construct_concept(parsed_concepts[:parent])
	children = parsed_concepts[:children].each_with_object([]) {|child,accu| accu << construct_concept(child)}
	concept_paths_data = add_parent_child_paths(parent,children)
end