Merge pull request #6069 from eileenmcnaughton/CRM-16627

[civicrm-core.git] / CRM / Utils / System / Base.php

<?php

/**
 * Base class for UF system integrations
 */
abstract class CRM_Utils_System_Base {
  /**
   * Deprecated property to check if this is a drupal install. The correct method is to have functions on the UF classes for all UF specific
   * functions and leave the codebase oblivious to the type of CMS
   *
   * @deprecated
   * @var bool
   *   TRUE, if the CMS is Drupal.
   */
  var $is_drupal = FALSE;

  /**
   * Deprecated property to check if this is a joomla install. The correct method is to have functions on the UF classes for all UF specific
   * functions and leave the codebase oblivious to the type of CMS
   *
   * @deprecated
   * @var bool
   *   TRUE, if the CMS is Joomla!.
   */
  var $is_joomla = FALSE;

  /**
   * deprecated property to check if this is a wordpress install. The correct method is to have functions on the UF classes for all UF specific
   * functions and leave the codebase oblivious to the type of CMS
   *
   * @deprecated
   * @var bool
   *   TRUE, if the CMS is WordPress.
   */
  var $is_wordpress = FALSE;

  /**
   * Does this CMS / UF support a CMS specific logging mechanism?
   * @todo - we should think about offering up logging mechanisms in a way that is also extensible by extensions
   * @var bool
   */
  var $supports_UF_Logging = FALSE;

  /**
   * @var bool
   *   TRUE, if the CMS allows CMS forms to be extended by hooks.
   */
  var $supports_form_extensions = FALSE;

  /**
   * Append an additional breadcrumb tag to the existing breadcrumb.
   *
   * @param array $breadCrumbs
   */
  public function appendBreadCrumb($breadCrumbs) {
  }

  /**
   * Reset an additional breadcrumb tag to the existing breadcrumb.
   */
  public function resetBreadCrumb() {
  }

  /**
   * Append a string to the head of the html file.
   *
   * @param string $head
   *   The new string to be appended.
   */
  public function addHTMLHead($head) {
  }

  /**
   * Rewrite various system urls to https.
   */
  public function mapConfigToSSL() {
    // dont need to do anything, let CMS handle their own switch to SSL
  }

  /**
   * Figure out the post url for QuickForm.
   *
   * @param string $action
   *   The default url if one is pre-specified.
   *
   * @return string
   *   The url to post the form.
   */
  public function postURL($action) {
    $config = CRM_Core_Config::singleton();
    if (!empty($action)) {
      return $action;
    }

    return $this->url(CRM_Utils_Array::value($config->userFrameworkURLVar, $_GET),
      NULL, TRUE, NULL, FALSE
    );
  }

  /**
   * Generate the url string to a CiviCRM path.
   *
   * @param string $path
   *   The path being linked to, such as "civicrm/add".
   * @param string $query
   *   A query string to append to the link.
   * @param bool $absolute
   *   Whether to force the output to be an absolute link (beginning with http).
   *   Useful for links that will be displayed outside the site, such as in an RSS feed.
   * @param string $fragment
   *   A fragment identifier (named anchor) to append to the link.
   * @param bool $htmlize
   *   Whether to encode special html characters such as &.
   * @param bool $frontend
   *   This link should be to the CMS front end (applies to WP & Joomla).
   * @param bool $forceBackend
   *   This link should be to the CMS back end (applies to WP & Joomla).
   *
   * @return string
   */
  public function url(
    $path = NULL,
    $query = NULL,
    $absolute = FALSE,
    $fragment = NULL,
    $htmlize = TRUE,
    $frontend = FALSE,
    $forceBackend = FALSE
  ) {
    return NULL;
  }

  /**
   * Authenticate the user against the CMS db.
   *
   * @param string $name
   *   The user name.
   * @param string $password
   *   The password for the above user.
   * @param bool $loadCMSBootstrap
   *   Load cms bootstrap?.
   * @param string $realPath
   *   Filename of script
   *
   * @return array|bool
   *   [contactID, ufID, unique string] else false if no auth
   */
  public function authenticate($name, $password, $loadCMSBootstrap = FALSE, $realPath = NULL) {
    return FALSE;
  }

  /**
   * Set a message in the CMS to display to a user.
   *
   * @param string $message
   *   The message to set.
   */
  public function setMessage($message) {
  }

  /**
   * Load user into session.
   *
   * @param $user
   *
   * @return bool
   */
  public function loadUser($user) {
    return TRUE;
  }

  /**
   * Immediately stop script execution and display a 401 "Access Denied" page
   */
  public function permissionDenied() {
    CRM_Core_Error::fatal(ts('You do not have permission to access this page.'));
  }

  /**
   * Immediately stop script execution, log out the user and redirect to the home page
   *
   * @deprecated
   *   This function should be removed in favor of linking to the CMS's logout page
   */
  public function logout() {
  }

  /**
   * Clear CMS caches related to the user registration/profile forms.
   * Used when updating/embedding profiles on CMS user forms.
   * @see CRM-3600
   */
  public function updateCategories() {
  }

  /**
   * Get the locale set in the CMS.
   *
   * @return string|null
   *   Locale or null for none
   */
  public function getUFLocale() {
    return NULL;
  }

  /**
   * If we are using a theming system, invoke theme, else just print the
   * content
   *
   * @param string $content
   *   The content that will be themed.
   * @param bool $print
   *   Are we displaying to the screen or bypassing theming?.
   * @param bool $maintenance
   *   For maintenance mode.
   *
   * @throws Exception
   * @return string|null
   *   NULL, If $print is FALSE, and some other criteria match up.
   *   The themed string, otherwise.
   *
   * @todo The return value is inconsistent.
   * @todo Better to always return, and never print.
   */
  public function theme(&$content, $print = FALSE, $maintenance = FALSE) {
    $ret = FALSE;

    // TODO: Split up; this was copied verbatim from CiviCRM 4.0's multi-UF theming function
    // but the parts should be copied into cleaner subclass implementations
    $config = CRM_Core_Config::singleton();
    if (
      $config->userSystem->is_drupal &&
      function_exists('theme') &&
      !$print
    ) {
      if ($maintenance) {
        drupal_set_breadcrumb('');
        drupal_maintenance_theme();
        if ($region = CRM_Core_Region::instance('html-header', FALSE)) {
          CRM_Utils_System::addHTMLHead($region->render(''));
        }
        print theme('maintenance_page', array('content' => $content));
        exit();
      }
      $ret = TRUE; // TODO: Figure out why D7 returns but everyone else prints
    }
    $out = $content;

    $config = &CRM_Core_Config::singleton();
    if (
      !$print &&
      $config->userFramework == 'WordPress'
    ) {
      if (!function_exists('is_admin')) {
        throw new \Exception('Function "is_admin()" is missing, even though WordPress is the user framework.');
      }
      if (!defined('ABSPATH')) {
        throw new \Exception('Constant "ABSPATH" is not defined, even though WordPress is the user framework.');
      }
      if (is_admin()) {
        require_once ABSPATH . 'wp-admin/admin-header.php';
      }
      else {
        // FIXME: we need to figure out to replace civicrm content on the frontend pages
      }
    }

    if ($ret) {
      return $out;
    }
    else {
      print $out;
      return NULL;
    }
  }

  /**
   * @return string
   */
  public function getDefaultBlockLocation() {
    return 'left';
  }

  /**
   * Get CMS Version.
   *
   * @return string
   */
  public function getVersion() {
    return 'Unknown';
  }

  /**
   * Format the url as per language Negotiation.
   *
   * @param string $url
   * @param bool $addLanguagePart
   * @param bool $removeLanguagePart
   *
   * @return string
   *   Formatted url.
   */
  public function languageNegotiationURL(
    $url,
    $addLanguagePart = TRUE,
    $removeLanguagePart = FALSE
  ) {
    return $url;
  }

  /**
   * Determine the location of the CMS root.
   *
   * @return string|null
   *   Local file system path to CMS root, or NULL if it cannot be determined
   */
  public function cmsRootPath() {
    return NULL;
  }

  /**
   * Create a user in the CMS.
   *
   * @param array $params
   * @param string $mail
   *   Email id for cms user.
   *
   * @return int|bool
   *   uid if user exists, false otherwise
   */
  public function createUser(&$params, $mail) {
    return FALSE;
  }

  /**
   * Update a user's email address in the CMS.
   *
   * @param int $ufID
   *   User ID in CMS.
   * @param string $email
   *   Primary contact email address.
   */
  public function updateCMSName($ufID, $email) {
  }

  /**
   * Check if user is logged in to the CMS.
   *
   * @return bool
   */
  public function isUserLoggedIn() {
    return FALSE;
  }

  /**
   * Get user login URL for hosting CMS (method declared in each CMS system class)
   *
   * @param string $destination
   *   If present, add destination to querystring (works for Drupal only).
   *
   * @return string
   *   loginURL for the current CMS
   */
  public abstract function getLoginURL($destination = '');

  /**
   * Get the login destination string. When this is passed in the
   * URL the user will be directed to it after filling in the CMS form
   *
   * @param CRM_Core_Form $form
   *   Form object representing the 'current' form - to which the user will be returned.
   * @return string|NULL
   *   destination value for URL
   */
  public function getLoginDestination(&$form) {
    return NULL;
  }

  /**
   * Determine the native ID of the CMS user.
   *
   * @param string $username
   *
   * @throws CRM_Core_Exception
   */
  public function getUfId($username) {
    $className = get_class($this);
    throw new CRM_Core_Exception("Not implemented: {$className}->getUfId");
  }

  /**
   * Set a init session with user object.
   *
   * @param array $data
   *   Array with user specific data
   */
  public function setUserSession($data) {
    list($userID, $ufID) = $data;
    $session = CRM_Core_Session::singleton();
    $session->set('ufID', $ufID);
    $session->set('userID', $userID);
  }

  /**
   * Reset any system caches that may be required for proper CiviCRM
   * integration.
   */
  public function flush() {
    // nullop by default
  }

  /**
   * Flush css/js caches
   */
  public function clearResourceCache() {
    // nullop by default
  }

  /**
   * Add a script file.
   *
   * Note: This function is not to be called directly
   * @see CRM_Core_Region::render()
   *
   * @param $url : string, absolute path to file
   * @param string $region
   *   location within the document: 'html-header', 'page-header', 'page-footer'.
   *
   * @return bool
   *   TRUE if we support this operation in this CMS, FALSE otherwise
   */
  public function addScriptUrl($url, $region) {
    return FALSE;
  }

  /**
   * Add an inline script.
   *
   * Note: This function is not to be called directly
   * @see CRM_Core_Region::render()
   *
   * @param $code : string, javascript code
   * @param string $region
   *   location within the document: 'html-header', 'page-header', 'page-footer'.
   *
   * @return bool
   *   TRUE if we support this operation in this CMS, FALSE otherwise
   */
  public function addScript($code, $region) {
    return FALSE;
  }

  /**
   * Add a css file.
   *
   * Note: This function is not to be called directly
   * @see CRM_Core_Region::render()
   *
   * @param $url : string, absolute path to file
   * @param string $region
   *   location within the document: 'html-header', 'page-header', 'page-footer'.
   *
   * @return bool
   *   TRUE if we support this operation in this CMS, FALSE otherwise
   */
  public function addStyleUrl($url, $region) {
    return FALSE;
  }

  /**
   * Add an inline style.
   *
   * Note: This function is not to be called directly
   * @see CRM_Core_Region::render()
   *
   * @param $code : string, css code
   * @param string $region
   *   location within the document: 'html-header', 'page-header', 'page-footer'.
   *
   * @return bool
   *   TRUE if we support this operation in this CMS, FALSE otherwise
   */
  public function addStyle($code, $region) {
    return FALSE;
  }

  /**
   * Sets the title of the page.
   *
   * @param string $title
   *   Title to set in html header
   * @param string|null $pageTitle
   *   Title to set in html body (if different)
   */
  public function setTitle($title, $pageTitle = NULL) {
  }

  /**
   * Return default Site Settings.
   *
   * @param string $dir
   *
   * @return array
   *   - $url, (Joomla - non admin url)
   *   - $siteName,
   *   - $siteRoot
   */
  public function getDefaultSiteSettings($dir) {
    $config = CRM_Core_Config::singleton();
    $url = $config->userFrameworkBaseURL;
    return array($url, NULL, NULL);
  }

  /**
   * Perform any post login activities required by the CMS -
   * e.g. for drupal: records a watchdog message about the new session, saves the login timestamp,
   * calls hook_user op 'login' and generates a new session.
   *
   * @param array $params
   *
   * FIXME: Document values accepted/required by $params
   */
  public function userLoginFinalize($params = array()) {
  }

  /**
   * Set timezone in mysql so that timestamp fields show the correct time.
   */
  public function setMySQLTimeZone() {
    $timeZoneOffset = $this->getTimeZoneOffset();
    if ($timeZoneOffset) {
      $sql = "SET time_zone = '$timeZoneOffset'";
      CRM_Core_DAO::executequery($sql);
    }
  }


  /**
   * Get timezone from CMS.
   *
   * @return string|false|null
   */
  public function getTimeZoneOffset() {
    $timezone = $this->getTimeZoneString();
    if ($timezone) {
      $tzObj = new DateTimeZone($timezone);
      $dateTime = new DateTime("now", $tzObj);
      $tz = $tzObj->getOffset($dateTime);

      if (empty($tz)) {
        return FALSE;
      }

      $timeZoneOffset = sprintf("%02d:%02d", $tz / 3600, abs(($tz / 60) % 60));

      if ($timeZoneOffset > 0) {
        $timeZoneOffset = '+' . $timeZoneOffset;
      }
      return $timeZoneOffset;
    }
    return NULL;
  }

  /**
   * Get timezone as a string.
   * @return string
   *   Timezone string e.g. 'America/Los_Angeles'
   */
  public function getTimeZoneString() {
    return date_default_timezone_get();
  }

  /**
   * Get Unique Identifier from UserFramework system (CMS)
   * @param object $user
   *   Object as described by the User Framework.
   * @return mixed
   *   $uniqueIdentifer Unique identifier from the user Framework system
   */
  public function getUniqueIdentifierFromUserObject($user) {
    return NULL;
  }

  /**
   * Get User ID from UserFramework system (CMS)
   * @param object $user
   *   Object as described by the User Framework.
   * @return null|int
   */
  public function getUserIDFromUserObject($user) {
    return NULL;
  }

  /**
   * Get currently logged in user uf id.
   *
   * @return int|null
   *   logged in user uf id.
   */
  public function getLoggedInUfID() {
    return NULL;
  }

  /**
   * Get currently logged in user unique identifier - this tends to be the email address or user name.
   *
   * @return string|null
   *   logged in user unique identifier
   */
  public function getLoggedInUniqueIdentifier() {
    return NULL;
  }

  /**
   * Return a UFID (user account ID from the UserFramework / CMS system being based on the user object
   * passed, defaulting to the logged in user if not passed. Note that ambiguous situation occurs
   * in CRM_Core_BAO_UFMatch::synchronize - a cleaner approach would seem to be resolving the user id before calling
   * the function
   *
   * Note there is already a function getUFId which takes $username as a param - we could add $user
   * as a second param to it but it seems messy - just overloading it because the name is taken
   * @param object $user
   * @return int
   *   $ufid - user ID of UF System
   */
  public function getBestUFID($user = NULL) {
    if ($user) {
      return $this->getUserIDFromUserObject($user);
    }
    return $this->getLoggedInUfID();
  }

  /**
   * Return a unique identifier (usually an email address or username) from the UserFramework / CMS system being based on the user object
   * passed, defaulting to the logged in user if not passed. Note that ambiguous situation occurs
   * in CRM_Core_BAO_UFMatch::synchronize - a cleaner approach would seem to be resolving the unique identifier before calling
   * the function
   *
   * @param object $user
   * @return string
   *   unique identifier from the UF System
   */
  public function getBestUFUniqueIdentifier($user = NULL) {
    if ($user) {
      return $this->getUniqueIdentifierFromUserObject($user);
    }
    return $this->getLoggedInUniqueIdentifier();
  }

  /**
   * List modules installed in the CMS, including enabled and disabled ones.
   *
   * @return array
   *   [CRM_Core_Module]
   */
  public function getModules() {
    return array();
  }

  /**
   * Get Url to view user record.
   * @param int $contactID
   *   Contact ID.
   *
   * @return string|null
   */
  public function getUserRecordUrl($contactID) {
    return NULL;
  }

  /**
   * Is the current user permitted to add a user.
   * @return bool
   */
  public function checkPermissionAddUser() {
    return FALSE;
  }

  /**
   * Output code from error function.
   * @param string $content
   */
  public function outputError($content) {
    echo CRM_Utils_System::theme($content);
  }

  /**
   * Log error to CMS.
   *
   * $param string $message
   */
  public function logger($message) {
  }

  /**
   * Append to coreResourcesList.
   *
   * @param array $list
   */
  public function appendCoreResources(&$list) {
  }

}