Class: Decidim::SettingsChange

Inherits:
Object
  • Object
show all
Defined in:
decidim-core/app/services/decidim/settings_change.rb

Overview

This is a helper class in order to publish component and settings changes so that components can react to these changes and send notifications to users.

Class Method Summary collapse

Class Method Details

.publish(component, previous_settings, current_settings) ⇒ Object

Publishes a change to ActiveSupport::Notifications.

component - The Decidim::Component where the changes have been applied. previous_settings - A Hash or a Decidim::SettingsManifest schema with the settings before changing them. current_settings - A Hash or a Decidim::SettingsManifest schema with the current settings.


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# File 'decidim-core/app/services/decidim/settings_change.rb', line 12

def self.publish(component, previous_settings, current_settings)
  ActiveSupport::Notifications.publish(
    "decidim.settings_change.#{component.manifest_name}",
    component_id: component.id,
    previous_settings: previous_settings.to_h.deep_symbolize_keys,
    current_settings: current_settings.to_h.deep_symbolize_keys
  )
end

.subscribe(scope, &block) ⇒ Object

Creates a subscription to setting changes.

scope - The String manifest name of the component so it only receives relevant changes. block - The block to be executed when an event is received.


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# File 'decidim-core/app/services/decidim/settings_change.rb', line 25

def self.subscribe(scope, &block)
  ActiveSupport::Notifications.subscribe(/^decidim\.settings_change\.#{scope}/) do |_event_name, data|
    block.call(data)
  end
end