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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Provides {@link tool_policy\output\renderer} class.
  19   *
  20   * @package     tool_policy
  21   * @category    output
  22   * @copyright   2018 David Mudrák <david@moodle.com>
  23   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  namespace tool_policy\output;
  27  
  28  defined('MOODLE_INTERNAL') || die();
  29  
  30  use core\output\mustache_template_finder;
  31  use plugin_renderer_base;
  32  use renderable;
  33  use Exception;
  34  
  35  /**
  36   * Renderer for the policies plugin.
  37   *
  38   * @copyright 2018 David Mudrak <david@moodle.com>
  39   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  40   */
  41  class renderer extends plugin_renderer_base {
  42  
  43      /**
  44       * Overrides the parent so that templatable widgets are handled even without their explicit render method.
  45       *
  46       * @param renderable $widget
  47       * @return string
  48       */
  49      public function render(renderable $widget) {
  50  
  51          $namespacedclassname = get_class($widget);
  52          $plainclassname = preg_replace('/^.*\\\/', '', $namespacedclassname);
  53          $rendermethod = 'render_'.$plainclassname;
  54  
  55          if (method_exists($this, $rendermethod)) {
  56              // Explicit rendering method exists, fall back to the default behaviour.
  57              return parent::render($widget);
  58          }
  59  
  60          $interfaces = class_implements($namespacedclassname);
  61  
  62          if (isset($interfaces['templatable'])) {
  63              // Default implementation of template-based rendering.
  64              $data = $widget->export_for_template($this);
  65              return parent::render_from_template('tool_policy/'.$plainclassname, $data);
  66  
  67          } else {
  68              return parent::render($widget);
  69          }
  70      }
  71  }