feat: Add notification pathway for aborted flows

classes/dataflow.php

@@ -63,6 +63,7 @@ protected static function define_properties(): array {
             'timemodified' => ['type' => PARAM_INT, 'default' => 0],
             'usermodified' => ['type' => PARAM_INT, 'default' => 0],
             'confighash' => ['type' => PARAM_TEXT, 'default' => ''],
+            'notifyonabort' => ['type' => PARAM_TEXT, 'default' => '']
         ];
     }
 

classes/form/dataflow_form.php

@@ -116,6 +116,9 @@ public function definition() {
         $select->setMultiple(true);
         $mform->addElement('static', 'log_handlers_desc', '', get_string('log_handlers_desc', 'tool_dataflows'));
 
+        $mform->addElement('text', 'notifyonabort', get_string('notifyonabort', 'tool_dataflows'));
+        $mform->addElement('static', 'notifyonabort_desc', '', get_string('notifyonabort_desc', 'tool_dataflows'));
+
         $this->add_action_buttons();
     }
 

classes/local/execution/engine.php

@@ -369,6 +369,10 @@ public function initialise() {
                 $error = error_get_last();
                 $this->logger->log(Logger::ERROR, 'Engine: shutdown happened abruptly', ['lasterror' => $error]);
                 $this->set_status(self::STATUS_ABORTED);
+
+                $notifyreason = new \Exception('Shutdown handler triggered abort. Last error: ' . $error);
+                $this->notify_on_abort($notifyreason);
+
                 $this->run->finalise($this->status, $this->export());
             }
         });
@@ -585,6 +589,9 @@ public function abort(?\Throwable $reason = null) {
         $this->set_status(self::STATUS_ABORTED);
         $this->release_lock();
 
+        // If configured to send email, attempt to notify of the abort reason.
+        $this->notify_on_abort($reason);
+
         // TODO: We may want to make this the responsibility of the caller.
         if (isset($reason)) {
             throw $reason;
@@ -845,4 +852,42 @@ private function setup_logging() {
 
         $this->logger = $log;
     }
+
+    /**
+     * Send a notification email for abort if required.
+     *
+     * @param \Throwable $reason A throwable representing the reason for abort.
+     */
+    public function notify_on_abort(?\Throwable $reason) {
+        // If configured to send email, attempt to notify of the abort reason.
+        $notifyemail = $this->dataflow->get('notifyonabort');
+        if (empty($notifyemail)) {
+            return;
+        }
+
+        $this->log('Sending abort notification email.', [], Logger::NOTICE);
+        $context = [
+            'flowname' => $this->dataflow->get('name'),
+            'run' => $this->run->get('id'),
+            'reason' => isset($reason) ? $reason->getMessage() : ''
+        ];
+        $message = get_string('notifyonabort_message', 'tool_dataflows', $context);
+
+        // First try to match the email with a Moodle user.
+        $to = \core_user::get_user_by_email($notifyemail);
+
+        // Otherwise send it with a dummy account.
+        if (!$to) {
+            $to = \core_user::get_noreply_user();
+            $to->email = $notifyemail;
+            $to->firstname = $this->dataflow->get('name');
+            $to->emailstop = 0;
+            $to->maildisplay = true;
+            $to->mailformat = 1;
+        }
+        $from = \core_user::get_noreply_user();
+        $subject = get_string('notifyonabort_subject', 'tool_dataflows', $this->dataflow->get('name'));
+
+        email_to_user($to, $from, $subject, $message);
+    }
 }

db/install.xml

@@ -18,6 +18,7 @@
         <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false" COMMENT="The time this record was modified."/>
         <FIELD NAME="usermodified" TYPE="int" LENGTH="10" NOTNULL="false" SEQUENCE="false" COMMENT="Who last modified this record?"/>
         <FIELD NAME="confighash" TYPE="char" LENGTH="40" NOTNULL="false" SEQUENCE="false" COMMENT="The config hash of the most recent run"/>
+        <FIELD NAME="notifyonabort" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" COMMENT="Email address to notify aborted runs to."/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>

db/upgrade.php

@@ -304,6 +304,21 @@ function xmldb_tool_dataflows_upgrade($oldversion) {
         upgrade_plugin_savepoint(true, 2023122201, 'tool', 'dataflows');
     }
 
+    if ($oldversion < 2024030200) {
+
+        // Define field loghandlers to be added to tool_dataflows.
+        $table = new xmldb_table('tool_dataflows');
+        $field = new xmldb_field('notifyonabort', XMLDB_TYPE_CHAR, '255', null, null, null, '', 'confighash');
+
+        // Conditionally launch add field loghandlers.
+        if (!$dbman->field_exists($table, $field)) {
+            $dbman->add_field($table, $field);
+        }
+
+        // Dataflows savepoint reached.
+        upgrade_plugin_savepoint(true, 2024030200, 'tool', 'dataflows');
+    }
+
     return true;
 }
 

lang/en/tool_dataflows.php

@@ -101,6 +101,14 @@
   Example:{$a->example} Note: If you use \'[dataroot]\', make sure to quote the value or it will be interpreted as an array.';
 $string['error:vars_not_object'] = 'Vars must form a YAML object (Define each var as <var>: <value>)';
 $string['error:invalid_yaml'] = 'Invalid YAML (Try quoting your value(s)): {$a}';
+$string['notifyonabort'] = 'Notify on abort';
+$string['notifyonabort_desc'] = 'Enter an email address to be notified on for dataflow aborts.';
+$string['notifyonabort_message'] = 'The dataflow {$a->flowname} was aborted on run {$a->run}.
+
+Reason: {$a->reason}
+
+See the run logs for further details.';
+$string['notifyonabort_subject'] = 'Dataflow run aborted: {$a}';
 
 // Dataflow import form.
 $string['dataflow_file'] = 'Dataflow file';

version.php

@@ -25,8 +25,8 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version = 2023122201;
-$plugin->release = 2023122201;
+$plugin->version = 2024030200;
+$plugin->release = 2024030200;
 $plugin->requires = 2022112800;    // Our lowest supported Moodle (3.3.0).
 $plugin->supported = [400, 402];
 // TODO $plugin->incompatible = ;  // Available as of Moodle 3.9.0 or later.