JezK
Edit File: delete_edge.rb
# frozen_string_literal: true require_relative 'action' module Gem::Resolver::Molinillo class DependencyGraph # @!visibility private # (see DependencyGraph#delete_edge) class DeleteEdge < Action # @!group Action # (see Action.action_name) def self.action_name :delete_edge end # (see Action#up) def up(graph) edge = make_edge(graph) edge.origin.outgoing_edges.delete(edge) edge.destination.incoming_edges.delete(edge) end # (see Action#down) def down(graph) edge = make_edge(graph) edge.origin.outgoing_edges << edge edge.destination.incoming_edges << edge edge end # @!group DeleteEdge # @return [String] the name of the origin of the edge attr_reader :origin_name # @return [String] the name of the destination of the edge attr_reader :destination_name # @return [Object] the requirement that the edge represents attr_reader :requirement # @param [DependencyGraph] graph the graph to find vertices from # @return [Edge] The edge this action adds def make_edge(graph) Edge.new( graph.vertex_named(origin_name), graph.vertex_named(destination_name), requirement ) end # Initialize an action to add an edge to a dependency graph # @param [String] origin_name the name of the origin of the edge # @param [String] destination_name the name of the destination of the edge # @param [Object] requirement the requirement that the edge represents def initialize(origin_name, destination_name, requirement) @origin_name = origin_name @destination_name = destination_name @requirement = requirement end end end end