Add system status check for missing dedupe rules

CRM/Utils/Check/Component/DedupeRules.php

@@ -0,0 +1,81 @@
+<?php
+/*
+ +--------------------------------------------------------------------+
+ | Copyright CiviCRM LLC. All rights reserved.                        |
+ |                                                                    |
+ | This work is published under the GNU AGPLv3 license with some      |
+ | permitted exceptions and without any warranty. For full license    |
+ | and copyright information, see https://civicrm.org/licensing       |
+ +--------------------------------------------------------------------+
+ */
+
+/**
+ * @package CRM
+ * @copyright CiviCRM LLC https://civicrm.org/licensing
+ */
+class CRM_Utils_Check_Component_DedupeRules extends CRM_Utils_Check_Component {
+
+  /**
+   * Get dedupe rules, grouped by contact type, for a specific usage
+   *
+   * @param string $used (Supervised, Unsupervised, General)
+   * @return string[]
+   */
+  private static function getContactTypesForRule($used) {
+    $dedupeRules = \Civi\Api4\DedupeRuleGroup::get()
+      ->addSelect('contact_type')
+      ->addGroupBy('contact_type')
+      ->addWhere('used', '=', $used)
+      ->execute();
+
+    $types = [];
+    foreach ($dedupeRules as $rule) {
+      if (!in_array($rule, $types)) {
+        $types[] = $rule['contact_type'];
+      }
+    }
+    return $types;
+  }
+
+  /**
+   * Returns an array of missing expected contact types
+   *
+   * @param string[] $rules
+   * @return array
+   */
+  private static function getMissingRules($rules) {
+    $types = array_column(CRM_Contact_BAO_ContactType::basicTypeInfo(), 'label', 'name');
+    return array_diff_key($types, array_flip($rules));
+  }
+
+  /**
+   * @return CRM_Utils_Check_Message[]
+   */
+  public static function checkDedupeRulesExist() {
+    $messages = [];
+
+    $ruleTypes = ['Supervised' => ts('Supervised'), 'Unsupervised' => ts('Unsupervised')];
+    foreach ($ruleTypes as $ruleType => $ruleLabel) {
+      $rules = self::getContactTypesForRule($ruleType);
+      $missingRules = self::getMissingRules($rules);
+      if ($missingRules) {
+        $message = new CRM_Utils_Check_Message(
+          __FUNCTION__ . $ruleType,
+          ts('For CiviCRM to function correctly you must have at least 2 dedupe rules configured for each contact type. You are missing a rule of type %1 for: %2', [1 => $ruleLabel, 2 => implode(', ', $missingRules)]),
+          ts('%1 dedupe rules missing', [1 => $ruleLabel]),
+          \Psr\Log\LogLevel::WARNING,
+          'fa-server'
+        );
+        $message->addAction(
+          ts('Configure dedupe rules'),
+          FALSE,
+          'href',
+          ['path' => 'civicrm/contact/deduperules', 'query' => ['reset' => 1]]
+        );
+        $messages[] = $message;
+      }
+    }
+    return $messages;
+  }
+
+}