Class: Verifly::DependentCallbacks::CallbackGroup::TSortService

Inherits:
Object
  • Object
show all
Includes:
TSort
Defined in:
lib/verifly/dependent_callbacks/callback_group.rb

Overview

Implements topoplogy sorting of callbacks. As far as CallbackGroup is designed to store Callbacks, it is unable to link them into graph immediately . Service can do it, because if some callbacks are missing on compilation stage, there should be an error

See Also:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(callback_group) ⇒ TSortService

Returns a new instance of TSortService.

Parameters:



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 30

def initialize(callback_group)
  self.dependencies = Hash.new { |h, k| h[k] = Set[] }

  callback_group.list.each do |callback|
    dependencies[callback] ||= []

    callback.before.each do |key|
      dependencies[callback_group.index.fetch(key)] << callback
    end

    callback.after.each do |key|
      dependencies[callback] << callback_group.index.fetch(key)
    end
  end
end

Instance Attribute Details

#dependencies ⇒ { Callback => Callback }

dependency graph

Returns:



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 18

def dependencies
  @dependencies
end

Class Method Details

.call(callback_group) ⇒ [Callback]

Returns tsorted callbacks array (aka sequence).

Parameters:

Returns:

  • ([Callback]) —

    tsorted callbacks array (aka sequence)



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 25

def self.call(callback_group)
  new(callback_group).tsort
end