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# frozen_string_literal: true
require 'molinillo/dependency_graph/action'
module 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
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