Class: Casting::Delegation

Inherits:
Object
  • Object
show all
Defined in:
lib/casting/delegation.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(**settings, &block) ⇒ Delegation 



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# File 'lib/casting/delegation.rb', line 20

def initialize(**settings, &block)
  @delegated_method_name = settings[:delegated_method_name]
  @client = settings[:client]
  @attendant = settings[:attendant]
  @arguments = settings[:arguments]
  @keyword_arguments = settings[:keyword_arguments]
  @block = block
end

Instance Attribute Details

#arguments ⇒ Object

Returns the value of attribute arguments.



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# File 'lib/casting/delegation.rb', line 17

def arguments
  @arguments
end

#attendant ⇒ Object

Returns the value of attribute attendant.



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# File 'lib/casting/delegation.rb', line 17

def attendant
  @attendant
end

#block=(value) ⇒ Object

Sets the attribute block



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# File 'lib/casting/delegation.rb', line 17

def block=(value)
  @block = value
end

#client ⇒ Object

Returns the value of attribute client.



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# File 'lib/casting/delegation.rb', line 17

def client
  @client
end

#delegated_method_name ⇒ Object

Returns the value of attribute delegated_method_name.



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# File 'lib/casting/delegation.rb', line 17

def delegated_method_name
  @delegated_method_name
end

Class Method Details

.prepare(delegated_method_name, client, &block) ⇒ Object 



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# File 'lib/casting/delegation.rb', line 13

def self.prepare(delegated_method_name, client, &block)
  new(delegated_method_name: delegated_method_name, client: client, &block)
end

Instance Method Details

#call(*args, **kwargs, &block) ⇒ Object

Raises:



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# File 'lib/casting/delegation.rb', line 46

def call(*args, **kwargs, &block)
  raise MissingAttendant.new unless attendant

  call_args = if args && !args.empty?
    args
  elsif @arguments && !@arguments.empty?
    @arguments
  end
  call_kwargs = if kwargs && !kwargs.empty?
    kwargs
  elsif @keyword_arguments && !@keyword_arguments.empty?
    @keyword_arguments
  end

  call_block = block || @block
  if call_args
    if call_kwargs
      bound_method.call(*call_args, **call_kwargs, &call_block)
    else
      bound_method.call(*call_args, &call_block)
    end
  else
    if call_kwargs
      bound_method.call(**call_kwargs, &call_block)
    else
      bound_method.call(&call_block)
    end
  end
end

#to(object_or_module) ⇒ Object 



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# File 'lib/casting/delegation.rb', line 29

def to(object_or_module)
  @attendant = object_or_module
  begin
    bound_method
  rescue TypeError
    @attendant = method_module || raise
  end
  self
end

#with(*args, **kwargs, &block) ⇒ Object 



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# File 'lib/casting/delegation.rb', line 39

def with(*args, **kwargs, &block)
  @arguments = args
  @keyword_arguments = kwargs
  @block = block
  self
end