CRM/Utils/Check.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.7                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2015                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
   9  |                                                                    |
  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
  18  |                                                                    |
  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
  21  | with this program; if not, contact CiviCRM LLC                     |
  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  23  | GNU Affero General Public License or the licensing of CiviCRM,     |
  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26  */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2015
  32  * $Id: $
  33  *
  34  */
  35 class CRM_Utils_Check {
  36   const
  37     // How often to run checks and notify admins about issues.
  38     CHECK_TIMER = 86400;
  39
  40   /**
  41    * We only need one instance of this object, so we use the
  42    * singleton pattern and cache the instance in this variable
  43    *
  44    * @var object
  45    */
  46   static private $_singleton = NULL;
  47
  48   /**
  49    * Provide static instance of CRM_Utils_Check.
  50    *
  51    * @return CRM_Utils_Check
  52    */
  53   public static function &singleton() {
  54     if (!isset(self::$_singleton)) {
  55       self::$_singleton = new CRM_Utils_Check();
  56     }
  57     return self::$_singleton;
  58   }
  59
  60   /**
  61    * Execute "checkAll".
  62    *
  63    * @param array|NULL $messages
  64    *   List of CRM_Utils_Check_Message; or NULL if the default list should be fetched.
  65    * @param array|string|callable $filter
  66    *   Restrict messages using a callback filter.
  67    *   By default, only show warnings and errors.
  68    *   Set TRUE to show all messages.
  69    */
  70   public function showPeriodicAlerts($messages = NULL, $filter = array(__CLASS__, 'severityMap')) {
  71     if (CRM_Core_Permission::check('administer CiviCRM')
  72       && CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'securityAlert', NULL, TRUE)
  73     ) {
  74       $session = CRM_Core_Session::singleton();
  75       if ($session->timer('check_' . __CLASS__, self::CHECK_TIMER)) {
  76
  77         // Best attempt at re-securing folders
  78         $config = CRM_Core_Config::singleton();
  79         $config->cleanup(0, FALSE);
  80
  81         if ($messages === NULL) {
  82           $messages = $this->checkAll();
  83         }
  84         $statusMessages = array();
  85         $statusType = 'alert';
  86         foreach ($messages as $message) {
  87           if ($filter === TRUE || $message->getSeverity() >= 3) {
  88             $statusType = $message->getSeverity() >= 4 ? 'error' : $statusType;
  89             $statusMessage = $message->getMessage();
  90             $statusMessages[] = $statusTitle = $message->getTitle();
  91           }
  92         }
  93
  94         if (count($statusMessages)) {
  95           if (count($statusMessages) > 1) {
  96             $statusTitle = ts('Multiple Alerts');
  97             $statusMessage = '<ul><li>' . implode('</li><li>', $statusMessages) . '</li></ul>';
  98           }
  99
 100           // TODO: add link to status page
 101           CRM_Core_Session::setStatus($statusMessage, $statusTitle, $statusType);
 102         }
 103       }
 104     }
 105   }
 106
 107   /**
 108    * Sort messages based upon severity
 109    *
 110    * @param CRM_Utils_Check_Message $a
 111    * @param CRM_Utils_Check_Message $b
 112    * @return int
 113    */
 114   public function severitySort($a, $b) {
 115     $aSeverity = $a->getSeverity();
 116     $bSeverity = $b->getSeverity();
 117     if ($aSeverity == $bSeverity) {
 118       return strcmp($a->getName(), $b->getName());
 119     }
 120     // The Message constructor guarantees that these will always be integers.
 121     return ($aSeverity < $bSeverity);
 122   }
 123
 124   /**
 125    * Get the integer value (useful for thresholds) of the severity.
 126    *
 127    * @param int|const $severity
 128    *   the value to look up
 129    * @param bool $reverse
 130    *   whether to find the constant from the integer
 131    * @return bool
 132    */
 133   public static function severityMap($severity, $reverse = FALSE) {
 134     // Lowercase string-based severities
 135     if (!$reverse) {
 136       $severity = strtolower($severity);
 137     }
 138
 139     // See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
 140     $levels = array(
 141       \Psr\Log\LogLevel::EMERGENCY => 7,
 142       \Psr\Log\LogLevel::ALERT => 6,
 143       \Psr\Log\LogLevel::CRITICAL => 5,
 144       \Psr\Log\LogLevel::ERROR => 4,
 145       \Psr\Log\LogLevel::WARNING => 3,
 146       \Psr\Log\LogLevel::NOTICE => 2,
 147       \Psr\Log\LogLevel::INFO => 1,
 148       \Psr\Log\LogLevel::DEBUG => 0,
 149     );
 150     return ($reverse) ? array_search($severity, $levels) : $levels[$severity];
 151   }
 152
 153   /**
 154    * Throw an exception if any of the checks fail.
 155    *
 156    * @param array|NULL $messages list of CRM_Utils_Check_Message; or NULL if the default list should be fetched
 157    *
 158    * @throws Exception
 159    */
 160   public function assertValid($messages = NULL) {
 161     if ($messages === NULL) {
 162       $messages = $this->checkAll();
 163     }
 164     if (!empty($messages)) {
 165       $messagesAsArray = array();
 166       foreach ($messages as $message) {
 167         $messagesAsArray[] = $message->toArray();
 168       }
 169       throw new Exception('There are configuration problems with this installation: ' . print_r($messagesAsArray, TRUE));
 170     }
 171   }
 172
 173   /**
 174    * Run some sanity checks.
 175    *
 176    * This could become a hook so that CiviCRM can run both built-in
 177    * configuration & sanity checks, and modules/extensions can add
 178    * their own checks.
 179    *
 180    * We might even expose the results of these checks on the Wordpress
 181    * plugin status page or the Drupal admin/reports/status path.
 182    *
 183    * @return array
 184    *   Array of messages
 185    * @link https://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_requirements
 186    */
 187   public function checkAll($showHushed = FALSE) {
 188     $checks = array();
 189     $checks[] = new CRM_Utils_Check_Security();
 190     $checks[] = new CRM_Utils_Check_Env();
 191
 192     $compInfo = CRM_Core_Component::getEnabledComponents();
 193     foreach ($compInfo as $compObj) {
 194       switch ($compObj->info['name']) {
 195         case 'CiviCase':
 196           $checks[] = new CRM_Utils_Check_Case(CRM_Case_XMLRepository::singleton(), CRM_Case_PseudoConstant::caseType('name'));
 197           break;
 198
 199         default:
 200       }
 201     }
 202
 203     $messages = array();
 204     foreach ($checks as $check) {
 205       $messages = array_merge($messages, $check->checkAll());
 206     }
 207
 208     CRM_Utils_Hook::check($messages);
 209
 210     if (!$showHushed) {
 211       foreach ($messages as $key => $message) {
 212         $hush = self::checkHushSnooze($message);
 213         if ($hush) {
 214           unset($messages[$key]);
 215         }
 216       }
 217     }
 218     uasort($messages, array(__CLASS__, 'severitySort'));
 219
 220     return $messages;
 221   }
 222
 223   /**
 224    * Evaluate if a system check should be hushed/snoozed.
 225    *
 226    * @return bool
 227    *   TRUE means hush/snooze, FALSE means display.
 228    */
 229   public function checkHushSnooze($message) {
 230     $statusPreferenceParams = array(
 231       'name' => $message->getName(),
 232       'domain_id' => CRM_Core_Config::domainID(),
 233     );
 234     // Check if there's a StatusPreference matching this name/domain.
 235     $statusPreference = civicrm_api3('StatusPreference', 'get', $statusPreferenceParams);
 236     $spid = FALSE;
 237     if (isset($statusPreference['id'])) {
 238       $spid = $statusPreference['id'];
 239     }
 240     if ($spid) {
 241       // If so, compare severity to StatusPreference->severity.
 242       $severity = $message->getSeverity();
 243       if ($severity <= $statusPreference['values'][$spid]['ignore_severity']) {
 244         // A hush or a snooze has been set.  Find out which.
 245         if (isset($statusPreference['values'][$spid]['hush_until'])) {
 246           // Snooze is set.
 247           $today = new DateTime();
 248           $snoozeDate = new DateTime($statusPreference['values'][$spid]['hush_until']);
 249           if ($today > $snoozeDate) {
 250             // Snooze is expired.
 251             return FALSE;
 252           }
 253           else {
 254             // Snooze is active.
 255             return TRUE;
 256           }
 257         }
 258         else {
 259           // Hush.
 260           return TRUE;
 261         }
 262       }
 263     }
 264     return FALSE;
 265   }
 266
 267 }