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modules/trigger/trigger.api.php

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+<?php
+
+/**
+ * @file
+ * Hooks provided by the Trigger module.
+ */
+
+/**
+ * @addtogroup hooks
+ * @{
+ */
+
+/**
+ * Declare triggers (events) for users to assign actions to.
+ *
+ * This hook is used by the trigger module to create a list of triggers (events)
+ * that users can assign actions to. Your module is responsible for detecting
+ * that the events have occurred, calling trigger_get_assigned_actions() to find
+ * out which actions the user has associated with your trigger, and then calling
+ * actions_do() to fire off the actions.
+ *
+ * @return
+ *   A nested associative array.
+ *   - The outermost key is the name of the module that is defining the triggers.
+ *     This will be used to create a local task (tab) in the trigger module's
+ *     user interface. A contrib module may supply a trigger for a core module by
+ *     giving the core module's name as the key. For example, you could use the
+ *     'node' key to add a node-related trigger.
+ *     - Within each module, each individual trigger is keyed by a hook name
+ *       describing the particular trigger (this is not visible to the user, but
+ *       can be used by your module for identification).
+ *       - Each trigger is described by an associative array. Currently, the only
+ *         key-value pair is 'label', which contains a translated human-readable
+ *         description of the triggering event.
+ *   For example, the trigger set for the 'node' module has 'node' as the
+ *   outermost key and defines triggers for 'node_insert', 'node_update',
+ *   'node_delete' etc. that fire when a node is saved, updated, etc.
+ *
+ * @see hook_action_info()
+ * @see hook_trigger_info_alter()
+ */
+function hook_trigger_info() {
+  return array(
+    'node' => array(
+      'node_presave' => array(
+        'label' => t('When either saving new content or updating existing content'),
+      ),
+      'node_insert' => array(
+        'label' => t('After saving new content'),
+      ),
+      'node_update' => array(
+        'label' => t('After saving updated content'),
+      ),
+      'node_delete' => array(
+        'label' => t('After deleting content'),
+      ),
+      'node_view' => array(
+        'label' => t('When content is viewed by an authenticated user'),
+      ),
+    ),
+  );
+}
+
+/**
+ * Alter triggers declared by hook_trigger_info().
+ *
+ * @param $triggers
+ *   Array of trigger information returned by hook_trigger_info()
+ *   implementations. Modify this array in place. See hook_trigger_info()
+ *   for information on what this might contain.
+ */
+function hook_trigger_info_alter(&$triggers) {
+  $triggers['node']['node_insert']['label'] = t('When content is saved');
+}
+
+/**
+ * @} End of "addtogroup hooks".
+ */