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Drupal example source code file (DEVELOPER.txt)
The DEVELOPER.txt Drupal example source code--------------------------------------------------- Some notes for developers working on the rules code --------------------------------------------------- Terminology & Overview ----------------------- * Rules plugins extend the "rules language". Thus conditions and actions are implemented with a plugin, but also loops or ORs are plugins. Each plugin is declared to be used in the condition or the action part - specified by the interface. * The action and condition plugin are a so called "AbstractPlugin" which means they have to be implemented by modules to be actually usable. In fact the callbacks provided by the action or condition implementation are incorporated in the plugin object using faces. That way an action or condition element behaves exactly like any other plugin instance. * Any rule element is an instance of a RulesPlugin. * A rules configuration consists of multiple rule elements while one is the root element, which may be a 'rule' but also any other plugin. * Each rules configuration may be persistently saved to the db using the entity CRUD API. Using the API on contained rule elements is working too and results in the whole configuration being updated. * Rules provides per plugin UI components, what makes the UI parts re-usable outside of the rule admin module too. In fact the rules admin module is pretty small, as it just relies on the provided UI of the components. * The UI is incorporated using the faces object extension mechanism, see rules_rules_plugin_info() for an overview of the used UI extenders. Other Drupal examples (source code examples)Here is a short list of links related to this Drupal DEVELOPER.txt source code file: |
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