Class: Verifly::DependentCallbacks::CallbackGroup

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

Overview

Handles callbacks with same ‘group’ option, allowing to do sequential invokation of them

Defined Under Namespace

Classes: TSortService

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) { ... } ⇒ CallbackGroup

Returns a new instance of CallbackGroup.

Parameters:

  • name (Symbol) —

    name of callback group

Yields:

  • self if block given



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 65

def initialize(name)
  self.name = name
  self.index = {}
  self.list = []

  yield(self) if block_given?
end

Instance Attribute Details

#index ⇒ {Symbol => Callback}

index for named callback lookup

Returns:

  • ({Symbol => Callback}) —

    the current value of index



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 11

def index
  @index
end

#list ⇒ [Callback]

all callbacks

Returns:

  • ([Callback]) —

    the current value of list



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 11

def list
  @list
end

#name ⇒ Symbol

name of callback group

Returns:

  • (Symbol) —

    the current value of name



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 11

def name
  @name
end

Instance Method Details

#add_callback(callback) ⇒ Object

Adds callback to list and index, reset sequence

Parameters:



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 75

def add_callback(callback)
  list << callback
  index[callback.name] = callback if callback.name

  @sequence = nil
end

#digest ⇒ Numeric

Digest change forces recompilation of callback group in service

Returns:

  • (Numeric) 


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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 101

def digest
  [name, list].hash
end

#merge(other) ⇒ Object

Merges with another group

Parameters:

Raises:

  • if group names differ



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 85

def merge(other)
  raise "Only groups with one name could be merged" unless name == other.name

  [*list, *other.list].each_with_object(CallbackGroup.new(name)) do |callback, group|
    group.add_callback(callback)
  end
end

#sequence ⇒ [Callback]

Memoizes tsorted graph

Returns:



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 95

def sequence
  @sequence ||= TSortService.call(self)
end

#to_dot(binding_) ⇒ Object

Renders graphviz dot-representation of callback group

Returns:

  • graphviz dot



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# File 'lib/verifly/dependent_callbacks/callback_group.rb', line 107

def to_dot(binding_)
  template_path = File.expand_path("callback_group.dot.erb", __dir__)
  erb = ERB.new(File.read(template_path))
  erb.filename = template_path
  erb.result(binding)
end