CourseObjectAccess.inc in Course 7.2

File

includes/CourseObjectAccess.inc

<?php

/**
 * Access handler for CourseObjects.
 *
 * Subtypes must define take(), see(), and view().
 */
abstract class CourseObjectAccess {
  private $courseObject;
  private $type;
  public function setType($type) {
    $this->type = $type;
  }

  /**
   * Helper method to get possible objects.
   */
  public function getObjectOptions() {
    $options = array(
      '',
    );
    foreach ($this
      ->getCourseObject()
      ->getCourse()
      ->getObjects() as $courseObject) {
      if ($courseObject
        ->getId() != $this
        ->getCourseObject()
        ->getId()) {
        $options[$courseObject
          ->getId()] = $courseObject
          ->getTitle();
      }
    }
    return $options;
  }
  public function setCourseObject($courseObject) {
    $this->courseObject = $courseObject;
  }

  /**
   * Get the course object associated with this access rule.
   *
   * @return CourseObject
   */
  public function getCourseObject() {
    return $this->courseObject;
  }

  /**
   * Can the user take the object?
   *
   * @param type $account
   * @return boolean
   */
  public function take($account) {

    // Block access if conditions evaluate.
    $alter = $this
      ->getOption('alter');
    if ($this
      ->evaluate($account) xor !empty($alter['negate'])) {
      if ($alter['access']) {
        return FALSE;
      }
    }
    return TRUE;
  }

  /**
   * Can the user see the object in the outline?
   *
   * @param type $account
   * @return boolean
   */
  public function see($account) {
    return TRUE;
  }

  /**
   * Can the user view the object but not interact?
   *
   * @param type $account
   * @return boolean
   */
  public function view($account) {
    return TRUE;
  }
  public function getOptions() {
    $plugins = $this
      ->getCourseObject()
      ->getOption('plugins');
    if (isset($plugins['access'][$this->type])) {
      return $plugins['access'][$this->type];
    }
    else {
      return $this
        ->optionsDefinition();
    }
  }
  public function getOption($option) {
    $options = $this
      ->getOptions();
    if (isset($options[$option])) {
      return $options[$option];
    }
    else {
      return NULL;
    }
  }

  /**
   * Define the form to be used in the object access settings area.
   */
  public function optionsForm($form, &$form_state) {
    $config = $this
      ->getOptions();
    $form['alter']['#weight'] = 100;
    $form['alter']['#type'] = 'fieldset';
    $form['alter']['#collapsed'] = FALSE;
    $form['alter']['#collapsible'] = FALSE;
    $form['alter']['#title'] = t('Modifications');
    $form['alter']['#attributes']['class'][] = 'course-object-access-alter';
    $form['alter']['negate'] = [
      '#title' => t('If the above condition(s) are:'),
      '#type' => 'select',
      '#options' => [
        0 => t('TRUE'),
        1 => t('FALSE'),
      ],
      '#default_value' => isset($config['alter']['negate']) ? $config['alter']['negate'] : 0,
    ];
    $form['alter']['access'] = [
      '#title' => t('Block access'),
      '#description' => t('This will prevent the user from accessing the course object.'),
      '#type' => 'checkbox',
      '#default_value' => isset($config['alter']['access']) ? $config['alter']['access'] : -1,
    ];
    $form['alter']['required'] = [
      '#title' => t('Required'),
      '#description' => t('Change the "Required" property.'),
      '#type' => 'radios',
      '#options' => [
        '-1' => t('No change'),
        1 => t('Make required'),
        0 => t('Make optional'),
      ],
      '#default_value' => isset($config['alter']['required']) ? $config['alter']['required'] : -1,
    ];
    $form['alter']['visible'] = [
      '#title' => t('Visibility'),
      '#description' => t('Change the "Visible" property.'),
      '#type' => 'radios',
      '#options' => [
        '-1' => t('No change'),
        1 => t('Visible'),
        0 => t('Hidden'),
      ],
      '#default_value' => isset($config['alter']['visible']) ? $config['alter']['visible'] : -1,
    ];
    return $form;
  }

  /**
   * Validate the access form.
   */
  public function optionsValidate($form, &$form_state) {
  }

  /**
   * Define access settings.
   */
  public function optionsDefinition() {
    return array();
  }

  /**
   * Alter a property during display/tracking. Does not affect the stored
   * options. This is called in CourseObject::getReadOnlyOptions().
   *
   * @param array $property
   *   Array of object options.
   *
   * @param object $account
   *   User account to evaluate.
   */
  public function alterOptions(&$options, $account) {
    $alter = $this
      ->getOption('alter');
    if ($this
      ->evaluate($account) xor !empty($alter['negate'])) {

      // Conditions passed. Apply modifications.
      if (isset($alter['required']) && $alter['required'] != -1) {
        $options['required'] = $alter['required'];
      }
      if (isset($alter['visible']) && $alter['visible'] != -1) {
        $options['hidden'] = !$alter['visible'];
      }
    }
  }
  public function evaluate($account) {
  }

}

Classes

Name	Description
CourseObjectAccess	Access handler for CourseObjects.