Class: Hydrangea::GraphTransform

Inherits:
Object
  • Object
show all
Defined in:
lib/hydrangea/graph_transform.rb

Direct Known Subclasses

PartialGraphTransform

Instance Method Summary collapse

Constructor Details

#initialize(graph) ⇒ GraphTransform

Returns a new instance of GraphTransform.



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# File 'lib/hydrangea/graph_transform.rb', line 7

def initialize(graph)
  @before = graph.to_set
  @after = Set.new
end

Instance Method Details

#finish ⇒ Object 



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# File 'lib/hydrangea/graph_transform.rb', line 28

def finish
  if @before.empty?
    Graph.new(@after)
  else
    size = @before.size
    raise ActionError, "REPLACE ME - NOT COMPLETE (#{size})"
  end
end

#pass(node:) ⇒ Object 



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# File 'lib/hydrangea/graph_transform.rb', line 18

def pass(node:)
  mark_completed(node)
  @after << node
  self
end

#transform(node:, new_state:, new_value:) ⇒ Object 



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# File 'lib/hydrangea/graph_transform.rb', line 12

def transform(node:, new_state:, new_value:)
  mark_completed(node)
  @after << Node.new(state: new_state, value: new_value, previous: node)
  self
end

#untransformed ⇒ Object 



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# File 'lib/hydrangea/graph_transform.rb', line 24

def untransformed
  @before.to_a
end