issue #116: add WS to delete and toggle rules

Author: dmitriim

classes/external/rules.php

@@ -58,28 +58,26 @@ public static function delete_rules_parameters(): external_function_parameters {
      * @return array
      */
     public static function delete_rules(array $ruleids): array {
-        global $DB;
-
         self::validate_parameters(self::delete_rules_parameters(), ['ruleids' => $ruleids]);
 
         $context = context_system::instance();
         self::validate_context($context);
         require_capability('tool/dynamic_cohorts:manage', $context);
 
         // We would like to treat deletion for multiple rules as one operation.
-        // If one failed we would like to fail whole call and roll back.
-        $transaction = $DB->start_delegated_transaction();
-        try {
-            foreach ($ruleids as $ruleid) {
-                $rule = rule::get_record(['id' => (int) $ruleid]);
-                if (empty($rule)) {
-                    throw new invalid_parameter_exception('Rule does not exist. ID: ' . $ruleid);
-                }
-                rule_manager::delete_rule($rule);
-                //$transaction->allow_commit();
+        // So let's check that all rules exist and then delete them.
+        // Otherwise throw an exception and fail whole WS call.
+        $rulestodelete = [];
+        foreach ($ruleids as $ruleid) {
+            $rule = rule::get_record(['id' => (int) $ruleid]);
+            if (empty($rule)) {
+                throw new invalid_parameter_exception('Rule does not exist. ID: ' . $ruleid);
             }
-        } catch (throwable $ex) {
-            $transaction->rollback($ex);
+            $rulestodelete[] = $rule;
+        }
+
+        foreach ($rulestodelete as $rule) {
+            rule_manager::delete_rule($rule);
         }
 
         return [];

tests/external/rules_test.php

@@ -93,9 +93,6 @@ public function test_delete_rules_keep_rules_when_one_is_invalid() {
 
         $this->assertCount(2, rule::get_records());
 
-        $this->expectException(\required_capability_exception::class);
-        $this->expectExceptionMessage('Rule does not exist. ID: 777');
-
         try {
             rules::delete_rules([$rule1->get('id'), $rule2->get('id'), 777]);
         } catch (\invalid_parameter_exception $exception) {