<?php

/**
 * This page is simply a container; any Angular modules defined by CiviCRM (or by CiviCRM extensions)
 * will be activated on this page.
 *
 * @link https://issues.civicrm.org/jira/browse/CRM-14479
 */
class CRM_Core_Page_Angular extends CRM_Core_Page {
  /**
   * The weight to assign to any Angular JS module files
   */
  const DEFAULT_MODULE_WEIGHT = 200;

  /**
   * @var CRM_Core_Resources
   */
  protected $res;

  /**
   * @param string $title
   *   Title of the page.
   * @param int $mode
   *   Mode of the page.
   * @param CRM_Core_Resources|null $res
   *   Resource manager.
   */
  public function __construct($title = NULL, $mode = NULL, $res = NULL) {
    parent::__construct($title, $mode);
    $this->res = CRM_Core_Resources::singleton();
  }

  /**
   * This function takes care of all the things common to all
   * pages. This typically involves assigning the appropriate
   * smarty variable :)
   *
   * @return string
   *   The content generated by running this page
   */
  public function run() {
    $this->registerResources();
    return parent::run();
  }

  /**
   * Register resources required by Angular.
   */
  public function registerResources() {
    $modules = $this->getAngularModules();

    $this->res->addSettingsFactory(function () use (&$modules) {
      // TODO optimization; client-side caching
      return array(
        'resourceUrls' => CRM_Extension_System::singleton()->getMapper()->getActiveModuleUrls(),
        'angular' => array(
          'modules' => array_merge(array('ngRoute'), array_keys($modules)),
        ),
        'crmAttachment' => array(
          'token' => CRM_Core_Page_AJAX_Attachment::createToken(),
        ),
      );
    });

    $this->res->addScriptFile('civicrm', 'bower_components/angular/angular.min.js', 100, 'html-header', FALSE);
    $this->res->addScriptFile('civicrm', 'bower_components/angular-route/angular-route.min.js', 110, 'html-header', FALSE);
    $headOffset = 0;
    foreach ($modules as $module) {
      if (!empty($module['css'])) {
        foreach ($module['css'] as $file) {
          $this->res->addStyleFile($module['ext'], $file, self::DEFAULT_MODULE_WEIGHT + (++$headOffset), 'html-header', TRUE);
        }
      }
      if (!empty($module['js'])) {
        foreach ($module['js'] as $file) {
          $this->res->addScriptFile($module['ext'], $file, self::DEFAULT_MODULE_WEIGHT + (++$headOffset), 'html-header', TRUE);
        }
      }
    }
  }

  /**
   * Get a list of AngularJS modules which should be autoloaded
   *
   * @return array
   *   (string $name => array('ext' => string $key, 'js' => array $paths, 'css' => array $paths))
   */
  public function getAngularModules() {
    $angularModules = array();
    $angularModules['angularFileUpload'] = array(
      'ext' => 'civicrm',
      'js' => array('bower_components/angular-file-upload/angular-file-upload.min.js'),
    );
    $angularModules['crmApp'] = array('ext' => 'civicrm', 'js' => array('js/angular-crmApp.js'));
    $angularModules['crmAttachment'] = array(
      'ext' => 'civicrm',
      'js' => array('js/angular-crmAttachment.js'),
      'css' => array('css/angular-crmAttachment.css'),
      'partials' => array('partials/crmAttachment/*.html'),
    );
    $angularModules['crmUi'] = array(
      'ext' => 'civicrm',
      'js' => array('js/angular-crm-ui.js', 'packages/ckeditor/ckeditor.js'),
      'partials' => array('partials/crmUi/*.html'),
    );
    $angularModules['crmUtil'] = array('ext' => 'civicrm', 'js' => array('js/angular-crm-util.js'));
    // https://github.com/jwstadler/angular-jquery-dialog-service
    $angularModules['dialogService'] = array(
      'ext' => 'civicrm',
      'js' => array('bower_components/angular-jquery-dialog-service/dialog-service.js'),
    );
    $angularModules['ngSanitize'] = array('ext' => 'civicrm', 'js' => array('js/angular-sanitize.js'));
    $angularModules['ui.utils'] = array(
      'ext' => 'civicrm',
      'js' => array('bower_components/angular-ui-utils/ui-utils.min.js'),
    );
    $angularModules['ui.sortable'] = array(
      'ext' => 'civicrm',
      'js' => array('bower_components/angular-ui-sortable/sortable.min.js'),
    );
    $angularModules['unsavedChanges'] = array(
      'ext' => 'civicrm',
      'js' => array('bower_components/angular-unsavedChanges/dist/unsavedChanges.min.js'),
    );

    foreach (CRM_Core_Component::getEnabledComponents() as $component) {
      $angularModules = array_merge($angularModules, $component->getAngularModules());
    }
    CRM_Utils_Hook::angularModules($angularModules);
    $angularModules = $this->resolvePatterns($angularModules);
    return $angularModules;
  }

  /**
   * @param array $modules
   *   List of Angular modules.
   * @return array
   *   Updated list of Angular modules
   */
  public function resolvePatterns($modules) {
    $newModules = array();

    foreach ($modules as $moduleKey => $module) {
      foreach (array('js', 'css', 'partials') as $fileset) {
        if (!isset($module[$fileset])) {
          continue;
        }
        $module[$fileset] = $this->res->glob($module['ext'], $module[$fileset]);
      }
      $newModules[$moduleKey] = $module;
    }

    return $newModules;
  }

}