<?php

/**
 * @file
 * Updates Drupal to use the latest version of jQuery.
 */

/**
 * Implements hook_help().
 */
function jquery_update_help($path, $arg) {
  switch ($path) {
    // Help for another path in the block module.
    case 'admin/config/development/jquery_update':
      return '<p>' . t('Configure how <a href="@jquery">jQuery</a> behaves on the site. Select which jQuery version, the compression level and whether or not to use a CDN.', array(
        '@jquery' => 'http://jquery.com',
      )) . '</p>';
  }
}

/**
 * Implements hook_library().
 */
function jquery_update_library() {
  // Register libraries available in the external directory.
  $path = drupal_get_path('module', 'jquery_update') . '/ui/external';
  $libraries['qunit'] = array(
    'title' => 'QUnit',
    'js' => array(
      $path . '/qunit.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'css' => array(
      $path . '/qunit.css' => array(),
    ),
    'version' => '1.11.0',
  );
  $libraries['jquery_update.ajax.fix'] = array(
    'title' => 'jQuery Update Version Fix',
    'js' => array(
      drupal_get_path('module', 'jquery_update') . '/js/jquery_update.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 3,
      ),
    ),
    'version' => '0.0.1',
  );
  $libraries['jquery.metadata'] = array(
    'title' => 'QUnit',
    'js' => array(
      $path . '/jquery.metadata.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'version' => '4187',
  );
  $libraries['jquery.bgiframe'] = array(
    'title' => 'bgiframe',
    'website' => 'http://docs.jquery.com/Plugins/bgiframe',
    'js' => array(
      $path . '/jquery.bgiframe.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'version' => '2.1.2',
  );

  return $libraries;
}

/**
 * Implements hook_library_alter().
 */
function jquery_update_library_alter(&$javascript, $module) {
  $path = drupal_get_path('module', 'jquery_update');
  $min = variable_get('jquery_update_compression_type', 'min') == 'none' ? '' : '.min';
  $version = variable_get('jquery_update_jquery_version', '1.10');

  // Replace jQuery with the alternative version.
  $admin_version = variable_get('jquery_update_jquery_admin_version', '');

  if (!empty($admin_version) && path_is_admin(current_path())) {
    if (version_compare($version, $admin_version, '!=')) {
      $version = $admin_version;
    }
  }
  // If the ajax version is set then that one always win.
  if (!empty($_POST['ajax_page_state']['jquery_version'])) {
    $ajax_version = $_POST['ajax_page_state']['jquery_version'];
    if (in_array($ajax_version, array('default', '1.5', '1.6', '1.7', '1.8', '1.9', '1.10'))) {
      $version = $ajax_version;
    }
  }

  // Modified System Library.
  if ($module === 'system') {

    // Make sure we inject either the minified or uncompressed version as desired.
    $cdn = variable_get('jquery_update_jquery_cdn', 'none');

    // Replace jQuery with the alternative version.
    $theme_version = theme_get_setting('jquery_update_jquery_version');
    if ($theme_version && version_compare($version, $theme_version, '!=')) {
      $version = $theme_version;
    }
    // If the ajax version is set then that one always win.
    if (!empty($_POST['ajax_page_state']['jquery_version'])) {
      $ajax_version = $_POST['ajax_page_state']['jquery_version'];
      if ($ajax_version == 'default' || in_array($ajax_version, jquery_update_get_versions())) {
        $version = $ajax_version;
      }
    }

    // Always add a new jquery_version array to ajaxPageState.
    // This is what we used to determine which version to use
    // for any ajax callback.
    $javascript['drupal.ajax']['js'][] = array(
      'data' => array('ajaxPageState' => array('jquery_version' => $version)),
      'type' => 'setting',
    );
    $javascript['drupal.ajax']['dependencies'][] = array('jquery_update', 'jquery_update.ajax.fix');

    // Don't replace anything if Drupal provided jQuery should be used
    if ('default' == $version) {
      return;
    }

    jquery_update_jquery_replace($javascript, $cdn, $path, $min, $version);

    // Replace jQuery UI with CDN or local files. If from a CDN include all of
    // jQuery UI.
    if (version_compare($version, '1.6', '>=')) {
      jquery_update_jqueryui_replace($javascript, $cdn, $path, $min);
    }

    // Load and configure the jQuery Migrate plugin.
    if (variable_get('jquery_update_jquery_migrate_enable', FALSE) && version_compare($version, '1.9', '>=')) {
      $javascript['jquery']['dependencies'][] = array('jquery_update', 'jquery.migrate');
    }

    // Replace the jQuery Cookie plugin.
    $javascript['cookie']['js']['misc/jquery.cookie.js']['data'] = $path . '/replace/ui/external/jquery.cookie.js';
    // Noting the version based on git commit as no version number is available.
    $javascript['cookie']['version'] = '67fb34f6a866c40d0570';

    // Replace jQuery Form Plugin.
    // jQuery >= 1.5 requires jQuery Form Plugin 3.x.
    if (version_compare($version, '1.5', '>=')) {
      $javascript['jquery.form']['js']['misc/jquery.form.js']['data'] = $path . '/replace/jquery.form/3/jquery.form' . $min . '.js';
      $javascript['jquery.form']['version'] = '3.51.0';
    }
    else {
      $javascript['jquery.form']['js']['misc/jquery.form.js']['data'] = $path . '/replace/jquery.form/2/jquery.form' . $min . '.js';
      $javascript['jquery.form']['version'] = '2.69';
    }
  }

  if (version_compare($version, '1.9', '>=')) {
    if ($module === 'jquery_update') {
      jquery_update_jquery_migrate_replace($javascript, $path, $min);
    }
  }
}

/**
 * Implements hook_menu().
 */
function jquery_update_menu() {
  $items['admin/config/development/jquery_update'] = array(
    'title' => 'jQuery Update',
    'description' => 'Configure settings related to the jQuery upgrade, the library path and compression.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('jquery_update_settings_form'),
    'access arguments' => array('administer site configuration'),
    'file' => 'jquery_update.admin.inc',
  );

  return $items;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function jquery_update_form_system_theme_settings_alter(&$form, $form_state) {
  // Ignore global theme settings.
  if (empty($form_state['build_info']['args'][0])) {
    return;
  }
  $form['jquery_update'] = array(
    '#type' => 'fieldset',
    '#title' => t('jQuery Update'),
    '#description' => t('You can optionally select a different version of jQuery to use for pages that are rendered using this theme. This is useful for administrative based themes.'),
  );
  $form['jquery_update']['jquery_update_jquery_version'] = array(
    '#type' => 'select',
    '#title' => t('Theme specific jQuery version'),
    '#options' => jquery_update_get_version_options(),
    '#default_value' => theme_get_setting('jquery_update_jquery_version', $form_state['build_info']['args'][0]),
  );
}

/**
 * Retrieve the jQuery versions available by this module.
 *
 * @return array
 *   The available jQuery versions.
 */
function jquery_update_get_versions() {
  // Use the advanced drupal_static() pattern, since this has the potential
  // to be called very often.
  static $drupal_static_fast;
  if (!isset($drupal_static_fast)) {
    $drupal_static_fast['versions'] = &drupal_static(__FUNCTION__, drupal_map_assoc(array(
      '1.5', '1.7', '1.8', '1.9', '1.10', '1.11', '2.1'
    )));
  }
  return $drupal_static_fast['versions'];
}

/**
 * Retrieve the jQuery versions available by this module as select options.
 *
 * @param bool $empty
 *   Toggle on whether or not to return an empty option, which will default
 *   to the site wide default setting.
 *
 * @return array
 *   The available jQuery versions used to populate a select input.
 */
function jquery_update_get_version_options($empty = TRUE) {
  $options = array_merge(array(
    '' => t('Site default (!version)', array(
      '!version' => variable_get('jquery_update_jquery_version', '1.10'),
    )),
    'default' => t('1.4 (Drupal core)'),
  ), jquery_update_get_versions());
  if (!$empty) {
    unset($options['']);
  }
  return $options;
}

/**
 * Update jQuery to the CDN or local path.
 *
 * @param array $javascript
 *   The library definition array as seen in hook_library_alter().
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The version of jQuery to use.
 */
function jquery_update_jquery_replace(&$javascript, $cdn, $path, $min, $version) {

  // Make sure to use the latest version in given branch.
  $trueversion = NULL;
  switch ($version) {
    case '1.5':
      $trueversion = '1.5.2';
      break;

    case '1.7':
      $trueversion = '1.7.2';
      break;

    case '1.8':
      $trueversion = '1.8.3';
      break;

    case '1.9':
      $trueversion = '1.9.1';
      break;

    case '1.10':
      $trueversion = '1.10.2';
      break;

    case '1.11':
      $trueversion = '1.11.2';
      break;

    case '2.1':
      $trueversion = '2.1.4';
      break;
  }
  $javascript['jquery']['version'] = $trueversion;

  // Check for CDN support.
  switch ($cdn) {
    case 'google':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//ajax.googleapis.com/ajax/libs/jquery/' . $trueversion . '/jquery' . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

    case 'microsoft':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//ajax.aspnetcdn.com/ajax/jQuery/jquery-' . $trueversion . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

    case 'jquery':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//code.jquery.com/jquery-' . $trueversion . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

    case 'none':
    default:
      $javascript['jquery']['js']['misc/jquery.js']['data'] = $path . '/replace/jquery/' . $version . '/jquery' . $min . '.js';
      break;
  }
}

/**
 * Add the local fallback in case jQuery from the CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The verison of jQuery to use.
 */
function jquery_update_jquery_backup(&$javascript, $path, $min, $version) {
  $javascript['jquery']['js'][] = array(
    'data' => 'window.jQuery || document.write("<script src=\'' . base_path() . $path . '/replace/jquery/' . $version . '/jquery' . $min . '.js\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -19.999999999,
  );
}

/**
 * Enable and configure the jQuery Migrate Plugin
 *
 * @param array $javascript
 *   The library definition array as seen in hook_library_alter().
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jquery_migrate_replace(&$javascript, $path, $min) {
  // Use a static version
  $version = '1.2.1';

  $jquery_migrate = $path . '/replace/jquery-migrate/' . $version . '/jquery-migrate' . $min . '.js';
  $javascript['jquery.migrate'] = array(
    'title' => 'jQuery Migrate',
    'website' => 'http://plugins.jquery.com/migrate',
    'version' => $version,
    'js' => array(
      $jquery_migrate => array(
        'group' => JS_LIBRARY,
        'weight' => -19.8,
      ),
    ),
  );

  // Configure the jQuery Migrate plugin.
  // Note: This must be done after jQuery has loaded, but before the jQuery
  // migrate plugin has loaded.
  $data = 'jQuery.migrateMute=' . (variable_get('jquery_update_jquery_migrate_warnings', FALSE) ? 'false' : 'true') . ';';
  $data .= 'jQuery.migrateTrace=' . (variable_get('jquery_update_jquery_migrate_trace', FALSE) ? 'true' : 'false') . ';';
  $javascript['jquery.migrate']['js'][] = array(
    'data' => $data,
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -19.899999999,
  );

  // Check for CDN support.
  if (variable_get('jquery_update_jquery_migrate_cdn', 'none') === 'jquery') {
    $javascript['jquery.migrate']['js'][$jquery_migrate]['data'] = '//code.jquery.com/jquery-migrate-' . $version . $min . '.js';
    $javascript['jquery.migrate']['js'][$jquery_migrate]['type'] = 'external';
    jquery_update_jquery_migrate_backup($javascript, $path, $min, $version);
  }
}

/**
 * Add the local fallback in case the jQuery Migrate Plugin from the CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The version of the jQuery Migrate Plugin to use.
 */
function jquery_update_jquery_migrate_backup(&$javascript, $path, $min, $version) {
  $javascript['jquery.migrate']['js'][] = array(
    'data' => 'window.jQuery && window.jQuery.migrateWarnings || document.write("<script src=\'' . base_path() . $path . '/replace/jquery-migrate/' . $version . '/jquery-migrate' . $min . '.js\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -19.7999999999,
  );
}

/**
 * Update jQuery UI to the CDN or local path.
 *
 * @param array $javascript
 *   The library definition array as seen in hook_library_alter().
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jqueryui_replace(&$javascript, $cdn, $path, $min) {
  // Add new components
  $javascript['ui.menu'] = array(
    'title' => 'jQuery UI: Menu',
    'website' => 'http://jqueryui.com/demos/menu/',
    'version' => '1.10.2',
    'js' => array('misc/ui/jquery.ui.menu.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.menu.css' => array()),
    'dependencies' => array(array('system', 'ui.widget'), array('system', 'ui.position')),
  );
  $javascript['ui.spinner'] = array(
    'title' => 'jQuery UI: Spinner',
    'website' => 'http://jqueryui.com/demos/spinner/',
    'version' => '1.10.2',
    'js' => array('misc/ui/jquery.ui.spinner.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.spinner.css' => array()),
    'dependencies' => array(array('system', 'ui.widget'), array('system', 'ui.button')),
  );
  $javascript['ui.tooltip'] = array(
    'title' => 'jQuery UI: Spinner',
    'website' => 'http://jqueryui.com/demos/tooltip/',
    'version' => '1.10.2',
    'js' => array('misc/ui/jquery.ui.tooltip.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.tooltip.css' => array()),
    'dependencies' => array(array('system', 'ui.widget'), array('system', 'ui.position')),
  );

  // fix dependencies
  $javascript['ui.autocomplete']['dependencies'][] = array('system', 'ui.menu');
  // Replace all CSS files.
  $names = drupal_map_assoc(array(
    'ui.accordion', 'ui.autocomplete', 'ui.button', 'ui.datepicker', 'ui.dialog',
    'ui.progressbar', 'ui.resizable', 'ui.selectable', 'ui.slider', 'ui.tabs',
    'ui.menu', 'ui.spinner', 'ui.tooltip',
  ));
  $names['ui'] = 'ui.core';
  $csspath = $path . '/replace/ui/themes/base/' . (($min == '.min') ? 'minified/' : '');
  foreach ($names as $name => $file) {
    $javascript[$name]['css']["misc/ui/jquery.$file.css"]['data'] = $csspath . 'jquery.' . $file . $min . '.css';
  }
  // Make sure ui.theme is replaced as well.
  $javascript['ui']['css']['misc/ui/jquery.ui.theme.css']['data'] = $csspath . 'jquery.ui.theme' . $min . '.css';

  // Replace jQuery UI's JavaScript, beginning by defining the mapping.
  $names = drupal_map_assoc(array(
    'ui.accordion', 'ui.autocomplete', 'ui.button', 'ui.datepicker', 'ui.dialog', 'ui.draggable',
    'ui.droppable', 'ui.mouse', 'ui.position', 'ui.progressbar', 'ui.resizable', 'ui.selectable',
    'ui.slider', 'ui.sortable', 'ui.tabs', 'ui.widget', 'ui.spinner', 'ui.menu', 'ui.tooltip',
  ));
  $names['ui'] = 'ui.core';
  $names['effects'] = array('effects.core', 'ui.effect'); // map[library_hook] = array(core_fn, updated_fn)
  $names = jquery_update_make_library_hook_to_file_name_segment_map_for_effects($names);

  switch ($cdn) {
    case 'google':
      $cdn = '//ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

    case 'microsoft':
      $cdn = '//ajax.aspnetcdn.com/ajax/jquery.ui/1.10.2/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

    case 'jquery':
      $cdn = '//code.jquery.com/ui/1.10.2/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

    case 'none':
      jquery_update_jqueryui_local($javascript, $path, $min, $names);
      break;
  }
}

/**
 * Create a mapping from system.module library hooks to file name segments.
 *
 * @param array $map Optional. If given, append to it.
 * @return array The keys are library hooks  and the values are each arrays of
 * 2 file name segments as values. The first file name segment can be used to
 * reach Drupal core's jQuery UI effect files, and the second file name segment
 * can be used to construct a path to the equivalent replacement
 * jQuery UI effect file provided by jquery_update.module.
 */
function jquery_update_make_library_hook_to_file_name_segment_map_for_effects($map = array()) {
  $effect_names = array(
    'blind', 'bounce', 'clip', 'drop', 'explode', 'fade', 'fold',
    'highlight', 'pulsate', 'scale', 'shake', 'slide', 'transfer',
  );
  foreach ($effect_names as $effect_name) {
    $library_hook = 'effects.' . $effect_name;
    $file_name_segment_core = $library_hook; // Yes, for the effect files, this is indeed identical.
    $file_name_segment_updated = 'ui.effect-' . $effect_name;
    $map[$library_hook] = array($file_name_segment_core, $file_name_segment_updated);
  }
  return $map;
}

/**
 * Add the local fallback in case jQuery UI from the CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jqueryui_backup(&$javascript, $path, $min) {
  $js_path = ($min == '.min') ? '/replace/ui/ui/minified/jquery-ui.min.js' : '/replace/ui/ui/jquery-ui.js';
  $javascript['ui']['js'][] = array(
    'data' => 'window.jQuery.ui || document.write("<script src=\'' . base_path() . $path . $js_path . '\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -10.999999999,
  );
}

/**
 * Handle when jQuery UI is updated to the cdn version.
 *
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * * @param array $names
 *   An array mapping jquery ui parts to their file names.
 */
function jquery_update_jqueryui_cdn($cdn, &$javascript, $path, $min, $names) {

  // Construct the jQuery UI path and replace the JavaScript.
  $jspath = $path . '/replace/ui/ui/' . ($min == '.min' ? 'minified/' : '');
  foreach ($names as $name => $file) {
    list($file_core, $file_updated) = is_array($file) ? $file : array($file, $file);
    $corefile = 'misc/ui/jquery.' . $file_core . '.min.js';
    // Remove the core files.
    unset($javascript[$name]['js'][$corefile]);
    $javascript[$name]['version'] = '1.10.2';
  }

  // UI is used by all of UI. Add the js cdn here.
  $javascript['ui']['js'][$cdn] = array(
    'data' => $cdn,
    'type' => 'external',
    'group' => JS_LIBRARY,
    'weight' => -11,
  );

  // The cdn puts jQuery UI core and the jQuery UI Effects library in the same
  // file, but the latter can normally be used without the former. So we need
  // to add a dependency to guarantee that code which uses the Effects library
  // has the file loaded regardless of whether they are also using jQuery UI
  // core.
  $javascript['effects']['dependencies'][] = array('system', 'ui');
}

/**
 * Handle when jQuery UI is updated to the local version.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param array $names
 *   An array mapping jquery ui parts to their file names.
 */
function jquery_update_jqueryui_local(&$javascript, $path, $min, $names) {

  // Construct the jQuery UI path and replace the JavaScript.
  $jspath = $path . '/replace/ui/ui/' . ($min == '.min' ? 'minified/' : '');
  foreach ($names as $name => $file) {
    list($file_core, $file_updated) = is_array($file) ? $file : array($file, $file);
    $corefile = 'misc/ui/jquery.' . $file_core . '.min.js';
    $javascript[$name]['js'][$corefile]['data'] = $jspath . 'jquery.' . $file_updated . $min . '.js';
    $javascript[$name]['version'] = '1.10.2';
  }
}
