Class: Volt::ControllerHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/volt/page/bindings/view_binding/controller_handler.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(controller, action) ⇒ ControllerHandler

Returns a new instance of ControllerHandler.



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 17

def initialize(controller, action)
  @controller = controller
  @action = action.to_sym if action

  @called_methods = {}
end

Instance Attribute Details

#action ⇒ Object (readonly)

Returns the value of attribute action.



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 3

def action
  @action
end

#controller ⇒ Object (readonly)

Returns the value of attribute controller.



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 3

def controller
  @controller
end

Class Method Details

.fetch(controller, action) ⇒ Object

Checks to see if a controller has a handler, and if not creates one.



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 6

def self.fetch(controller, action)
  inst = controller.instance_variable_get('@__handler')

  unless inst
    inst = new(controller, action)
    controller.instance_variable_set('@__handler', inst)
  end

  inst
end

.get_controller_and_action(controller_path) ⇒ Object

Fetch the controller class



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 63

def self.get_controller_and_action(controller_path)
  fail "Invalid controller path: #{controller_path.inspect}" unless controller_path && controller_path.size > 0

  action = controller_path[-1]

  # Get the constant parts
  parts  = controller_path[0..-2].map { |v| v.tr('-', '_').camelize }

  # Do const lookups starting at object and working our way down.
  # So Volt::ProgressBar would lookup Volt, then ProgressBar on Volt.
  obj = Object
  parts.each do |part|
    if obj.const_defined?(part)
      obj = obj.const_get(part)
    else
      # return a blank ModelController
      return [ModelController, nil]
    end
  end

  [obj, action]
end

Instance Method Details

#call_action(stage_prefix = nil, stage_suffix = nil) ⇒ Object 



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# File 'lib/volt/page/bindings/view_binding/controller_handler.rb', line 24

def call_action(stage_prefix = nil, stage_suffix = nil)
  return unless @action

  has_stage = stage_prefix || stage_suffix

  if has_stage
    method_name = @action
    method_name = "#{stage_prefix}_#{method_name}" if stage_prefix
    method_name = "#{method_name}_#{stage_suffix}" if stage_suffix

    method_name = method_name.to_sym
  else
    method_name = @action
  end

  # Don't call if its already been called
  return if @called_methods[method_name]

  # Track that this method got called
  @called_methods[method_name] = true

  # If no stage, then we are calling the main action method,
  # so we should call the before/after actions
  unless has_stage
    if @controller.run_callbacks(:before_action, @action)
      # stop_chain was called
      return true
    end
  end

  @controller.send(method_name) if @controller.respond_to?(method_name)

  @controller.run_callbacks(:after_action, @action) unless has_stage

  # before_action chain was not stopped
  false
end