<?php
// $Id$

/**
 * Implementation of hook_schema().
 */
function wysiwyg_schema() {
  $schema = array();
  $schema['wysiwyg'] = array(
    'description' => t('Stores Wysiwyg profiles.'),
    'fields' => array(
      'format' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
      'editor' => array('type' => 'varchar', 'length' => 128, 'not null' => TRUE, 'default' => ''),
      'settings' => array('type' => 'text', 'size' => 'normal'),
    ),
    'primary key' => array('format'),
  );
  return $schema;
}

/**
 * Implementation of hook_install().
 */
function wysiwyg_install() {
  drupal_install_schema('wysiwyg');
  // Import settings from old editor modules.
  wysiwyg_migrate_tinymce();
}

/**
 * Implementation of hook_uninstall()
 */
function wysiwyg_uninstall() {
  drupal_uninstall_schema('wysiwyg');
}

/**
 * Migrate from TinyMCE.
 */
function wysiwyg_migrate_tinymce() {
  if (db_table_exists('tinymce_settings')) {
    $schema = db_result(db_query("SELECT schema_version FROM {system} WHERE name = 'tinymce'"));
    if ($schema >= 1) {
      // Migrate profile configurations.
      $profiles = db_query("SELECT settings FROM {tinymce_settings}");
      while ($profile = db_fetch_array($profiles)) {
        $settings = unserialize($profile['settings']);
        // Convert buttons/plugins into an associative array.
        $old_buttons = (isset($settings['buttons']) ? $settings['buttons'] : array());
        $settings['buttons'] = array();
        foreach ($old_buttons as $old_button => $enabled) {
          list($plugin, $button) = explode('-', $old_button, 2);
          $settings['buttons'][$plugin][$button] = 1;
        }
        foreach (_wysiwyg_install_get_formats() as $format => $name) {
          // We can't use update_sql() here because of curly braces in serialized
          // array.
          db_query("INSERT INTO {wysiwyg} (format, editor, settings) VALUES (%d, 'tinymce', '%s')", $format, serialize($settings));
        }
        // We can only migrate one profile.
        break;
      }
      // Disable TinyMCE module.
      module_disable(array('tinymce'));
      drupal_set_message('TinyMCE module can be safely uninstalled now.');
    }
    else {
      drupal_set_message('To migrate your existing TinyMCE settings to Wysiwyg Editor, please update TinyMCE module to the latest official release, and re-install Wysiwyg Editor module.');
    }
  }
}

/**
 * Retrieve a list of input formats to associate profiles to.
 */
function _wysiwyg_install_get_formats() {
  $formats = array();
  $result = db_query("SELECT format, name FROM {filter_formats}");
  while ($format = db_fetch_object($result)) {
    // Build a list of all formats.
    $formats[$format->format] = $format->name;
    // Fetch filters.
    $result2 = db_query("SELECT module, delta FROM {filters} WHERE format = %d", $format->format);
    while ($filter = db_fetch_object($result2)) {
      // If PHP filter is enabled, remove this format.
      if ($filter->module == 'php') {
        unset($formats[$format->format]);
        break;
      }
    }
  }
  return $formats;
}

/**
 * Associate Wysiwyg profiles with input formats.
 *
 * Since there was no association yet, we can only assume that there is one
 * profile only, and that profile must be duplicated and assigned to all input
 * formats (except PHP code format).  Also, input formats already have
 * titles/names, so Wysiwyg profiles do not need an own.
 *
 * Because input formats are already granted to certain user roles only, we can
 * remove our custom Wysiwyg profile permissions.  A 1:1 relationship between
 * input formats and permissions makes plugin_count obsolete, too.
 *
 * Since the resulting table is completely different, a new schema is installed.
 */
function wysiwyg_update_6001() {
  $ret = array();
  if (db_table_exists('wysiwyg')) {
    return $ret;
  }
  // Install new schema.
  db_create_table($ret, 'wysiwyg', array(
    'fields' => array(
      'format' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
      'editor' => array('type' => 'varchar', 'length' => 128, 'not null' => TRUE, 'default' => ''),
      'settings' => array('type' => 'text', 'size' => 'normal'),
    ),
    'primary key' => array('format'),
  ));

  // Fetch all input formats.
  $formats = _wysiwyg_install_get_formats();

  // Fetch all profiles.
  $result = db_query("SELECT name, settings FROM {wysiwyg_profile}");
  while ($profile = db_fetch_object($result)) {
    $profile->settings = unserialize($profile->settings);
    // Extract editor name from profile settings.
    $profile->editor = $profile->settings['editor'];
    // Clean-up.
    unset($profile->settings['editor']);
    unset($profile->settings['old_name']);
    unset($profile->settings['name']);
    unset($profile->settings['rids']);
    // Sorry.  There Can Be Only One. ;)
    break;
  }

  if ($profile) {
    // Rebuild profiles and associate with input formats.
    foreach ($formats as $format => $name) {
      // Insert profiles.
      // We can't use update_sql() here because of curly braces in serialized
      // array.
      db_query("INSERT INTO {wysiwyg} (format, editor, settings) VALUES (%d, '%s', '%s')", $format, $profile->editor, serialize($profile->settings));
      $ret[] = array(
        'success' => TRUE,
        'query' => strtr('Wysiwyg profile %profile converted and associated with input format %format.', array('%profile' => check_plain($profile->name), '%format' => check_plain($name))),
      );
    }
  }

  // Drop obsolete tables {wysiwyg_profile} and {wysiwyg_role}.
  db_drop_table($ret, 'wysiwyg_profile');
  db_drop_table($ret, 'wysiwyg_role');

  return $ret;
}