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# frozen_string_literal: true
require 'molinillo/dependency_graph/action'
module Molinillo
class DependencyGraph
# @!visibility private
# (see DependencyGraph#add_vertex)
class AddVertex < Action # :nodoc:
# @!group Action
# (see Action.action_name)
def self.action_name
:add_vertex
end
# (see Action#up)
def up(graph)
if existing = graph.vertices[name]
@existing_payload = existing.payload
@existing_root = existing.root
end
vertex = existing || Vertex.new(name, payload)
graph.vertices[vertex.name] = vertex
vertex.payload ||= payload
vertex.root ||= root
vertex
end
# (see Action#down)
def down(graph)
if defined?(@existing_payload)
vertex = graph.vertices[name]
vertex.payload = @existing_payload
vertex.root = @existing_root
else
graph.vertices.delete(name)
end
end
# @!group AddVertex
# @return [String] the name of the vertex
attr_reader :name
# @return [Object] the payload for the vertex
attr_reader :payload
# @return [Boolean] whether the vertex is root or not
attr_reader :root
# Initialize an action to add a vertex to a dependency graph
# @param [String] name the name of the vertex
# @param [Object] payload the payload for the vertex
# @param [Boolean] root whether the vertex is root or not
def initialize(name, payload, root)
@name = name
@payload = payload
@root = root
end
end
end
end
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