Class: Graphlyte::Editor::Context

Inherits:
Struct
  • Object
show all
Defined in:
lib/graphlyte/editor.rb

Overview

The class responsible for orchestration of the hooks. This class defines the recursion through the document.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#direction ⇒ Object

Returns the value of attribute direction

Returns:

  • (Object) —

    the current value of direction



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# File 'lib/graphlyte/editor.rb', line 90

def direction
  @direction
end

#document ⇒ Object

Returns the value of attribute document

Returns:

  • (Object) —

    the current value of document



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# File 'lib/graphlyte/editor.rb', line 90

def document
  @document
end

#hooks ⇒ Object

Returns the value of attribute hooks

Returns:

  • (Object) —

    the current value of hooks



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# File 'lib/graphlyte/editor.rb', line 90

def hooks
  @hooks
end

#path ⇒ Object

Returns the value of attribute path

Returns:

  • (Object) —

    the current value of path



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# File 'lib/graphlyte/editor.rb', line 90

def path
  @path
end

Instance Method Details

#edit(object, &block) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 91

def edit(object, &block)
  parent = path.last
  path.push(object)

  processor = hooks[object.class]
  action = Action.new(object, path, parent, document)

  case direction
  when :bottom_up
    edit_bottom_up(object, processor, action, &block)
  when :top_down
    edit_top_down(object, processor, action, &block)
  else
    raise ArgumentError, "Unknown direction: #{direction}"
  end

  action.new_nodes
ensure
  path.pop
end

#edit_arguments(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 148

def edit_arguments(object)
  return unless object.respond_to?(:arguments)

  object.arguments = object.arguments&.flat_map do |arg|
    edit(arg) do |_a|
      arg.value = edit_value(arg.value).first
      raise Deleted if arg.value.nil?
    end
  end
end

#edit_bottom_up(object, processor, action) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 122

def edit_bottom_up(object, processor, action)
  yield object if block_given?
  processor&.call(object, action)
rescue Deleted
  action.new_nodes = []
end

#edit_definition(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 188

def edit_definition(object)
  edit(object) do |o|
    edit_variables(o)
    edit_directives(o)
    edit_selection(o)
  end
end

#edit_directives(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 140

def edit_directives(object)
  return unless object.respond_to?(:directives)

  object.directives = object.directives&.flat_map do |dir|
    edit(dir) { |d| edit_arguments(d) }
  end
end

#edit_selection(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 176

def edit_selection(object)
  return unless object.respond_to?(:selection)

  object.selection = object.selection&.flat_map do |selected|
    edit(selected) do |s|
      edit_arguments(s)
      edit_directives(s)
      edit_selection(s)
    end
  end
end

#edit_top_down(object, processor, action) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 112

def edit_top_down(object, processor, action)
  processor&.call(object, action)
  action.new_nodes = action.new_nodes.filter_map do |node|
    yield node if block_given?
    node
  rescue Deleted
    nil
  end
end

#edit_value(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 159

def edit_value(object)
  case object
  when Array
    [object.flat_map { edit_value(_1) }]
  when Hash
    [
      object.to_a.flat_map do |(k, old_value)|
        edit_value(old_value).take(1).map do |new_value|
          [k, new_value]
        end
      end.to_h
    ]
  else
    edit(object)
  end
end

#edit_variables(object) ⇒ Object 



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# File 'lib/graphlyte/editor.rb', line 129

def edit_variables(object)
  return unless object.respond_to?(:variables)

  object.variables = object.variables&.flat_map do |var|
    edit(var) do |v|
      edit_directives(v)
      v.default_value = edit_value(v.default_value).first
    end
  end
end