<?php

/**
 * @file
 * The joomla module used for migrate Joomla to Drupal.
 */
define('JOOMLA_IMPORT_CONTENT', TRUE);
define('JOOMLA_IMPORT_CATEGORIES', TRUE);
define('JOOMLA_IMPORT_USERS', TRUE);
define('JOOMLA_IMPORT_COMMENTS', FALSE);
define('JOOMLA_DATABASE_HOST', 'localhost');
define('JOOMLA_DATABASE_NAME', 'joomla');
define('JOOMLA_DATABASE_USER', 'joomla');
define('JOOMLA_DATABASE_PASS', FALSE);
define('JOOMLA_DATABASE_PORT', 3306);
define('JOOMLA_PREFIX', 'jos_');
define('JOOMLA_PATH', FALSE);
define('JOOMLA_INPUT_FORMAT', 'filtered_html');
define('JOOMLA_UPDATE_DUPLICATE', FALSE);
define('JOOMLA_IMG_FOLDER', 'images');
define('JOOMLA_ENTITY_TYPE', 'node');
define('JOOMLA_DEFAULT_STATIC_NODETYPE', 'page');
define('JOOMLA_DEFAULT_BLOG_NODETYPE', 'article');
define('JOOMLA_SEPERATE_BY_SECTION', 0);
define('JOOMLA_REAL_NAME_FIELD', FALSE);

/**
 * Implements hook_help().
 */
function joomla_help($section) {
  switch ($section) {
    case 'admin/help#joomla':
      $output = "The joomla module used for migrate Joomla to Drupal.";
      return $output;
    case 'admin/modules#description':
      return 'The joomla module used for migrate Joomla to Drupal.';
  }
}

/**
 * Implements hook_permission().
 */
function joomla_permission() {
  return array('administer joomla' => array(
      'description' => t('Access Joomla Import Settings'),
      'title' => t('Administer Joomla'),
      'restrict access' => TRUE,
    ),
  );
}

/**
 * Implements hook_node_delete().
 */
function joomla_node_delete($node) {
  db_delete('joomla_content')
    ->condition('nid', $node->nid)
    ->execute();
}

/**
 * Implements hook_menu().
 */
function joomla_menu() {
  $items = array();
  $items['admin/content/joomla_import'] = array(
    'title' => 'Import from Joomla',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('joomla_import_form'),
    'access arguments' => array('administer joomla'),
    'description' => 'Import content, categories and users from a Joomla website',
    'type' => MENU_LOCAL_TASK | MENU_NORMAL_ITEM,
  );
  $items['admin/config/content/joomla'] = array(
    'title' => 'Joomla to Drupal',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('joomla_admin_settings'),
    'access arguments' => array('administer joomla'),
    'description' => 'Migrate Joomla to Drupal.',
  );
  $items['admin/config/content/joomla/settings'] = array(
    'title' => 'Settings',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -10,
  );
  return $items;
}

/**
 * Joomla admin settings.
 */
function joomla_admin_settings($form, &$form_state) {
  // only administrators can access this function
  $weight = -20;
  $bundle = variable_get('joomla_default_static_nodetype', JOOMLA_DEFAULT_STATIC_NODETYPE);
  // Generate the form - settings applying to all patterns first
  $form['joomla_import_settings'] = array(
    '#type' => 'fieldset',
    '#weight' => $weight,
    '#title' => t('Import defaults'),
    '#collapsible' => FALSE,
    '#collapsed' => FALSE,
    '#description' => 'Set the default values for the ' . l('Import from Joomla', 'admin/content/joomla_import') . ' form',
  );
  $form['joomla_import_settings'][] = joomla_import_form_checkboxes();
  $weight++;
  $form['joomla_settings_database'] = array(
    '#type' => 'fieldset',
    '#weight' => $weight,
    '#title' => t('Joomla settings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE
  );
  $form['joomla_settings_database']['joomla_database_host'] = array(
    '#type' => 'textfield',
    '#title' => 'Joomla database host name',
    '#default_value' => variable_get('joomla_database_host', JOOMLA_DATABASE_HOST),
    '#description' => 'Host name of Joomla database server.'
  );
  $form['joomla_settings_database']['joomla_database_name'] = array(
    '#type' => 'textfield',
    '#title' => 'Joomla database name',
    '#default_value' => variable_get('joomla_database_name', JOOMLA_DATABASE_NAME),
    '#description' => 'Joomla database name.'
  );
  $form['joomla_settings_database']['joomla_database_user'] = array(
    '#type' => 'textfield',
    '#title' => 'Joomla database user name',
    '#default_value' => variable_get('joomla_database_user', JOOMLA_DATABASE_USER),
    '#description' => 'User name for Joomla database server.'
  );
  $form['joomla_settings_database']['joomla_database_pass'] = array(
    '#type' => 'textfield',
    '#title' => 'Joomla database password',
    '#default_value' => variable_get('joomla_database_pass', JOOMLA_DATABASE_PASS),
    '#description' => 'Password for Joomla database server.'
  );
  $form['joomla_settings_database']['advanced'] = array(
    '#type' => 'fieldset',
    '#title' => t('Advanced database settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE
  );
  $form['joomla_settings_database']['advanced']['joomla_database_port'] = array(
    '#type' => 'textfield',
    '#title' => 'Joomla database port number',
    '#default_value' => variable_get('joomla_database_port', JOOMLA_DATABASE_PORT),
    '#description' => 'Port number for Joomla database server.  The default (3306) is usually fine.'
  );
  $form['joomla_settings_database']['advanced']['joomla_prefix'] = array(
    '#type' => 'textfield',
    '#title' => 'Table Prefix of Joomla',
    '#default_value' => variable_get('joomla_prefix', JOOMLA_PREFIX),
    '#description' => 'Table Prefix for Joomla tables.'
  );
  $form['joomla_settings_database']['joomla_path'] = array(
    '#type' => 'textfield',
    '#title' => 'Path of your Joomla installation',
    '#default_value' => variable_get('joomla_path', JOOMLA_PATH),
    '#description' => 'The path name where you install Joomla. Example:<br />'
      . '<ul><li>Apache: <b>/home/YOUR_USERNAME/public_html/joomla</b></li>'
      . '<li>Windows using WAMP: <b>c:/wamp/www/joomla</b></li>'
      . '<li>Windows using IIS: <b>C:/Inetpub/wwwroot/joomla</b></li></ul>'
  );
  $weight++;
  $form['joomla_settings_content'] = array(
    '#type' => 'fieldset',
    '#weight' => $weight,
    '#title' => t('Content settings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE
  );
  $filter_node_options = array();
  foreach (node_type_get_types() as $key => $val) {
    if (node_access('create', $key)) {
      $filter_node_options[$key] = $val->name;
    }
  }
  $form['joomla_settings_content']['joomla_default_static_nodetype'] = array(
    '#type' => 'select',
    '#title' => t('Default node type for static items'),
    '#required' => TRUE,
    '#options' => $filter_node_options,
    '#default_value' => $bundle,
  );
  $form['joomla_settings_content']['joomla_default_blog_nodetype'] = array(
    '#type' => 'select',
    '#title' => t('Default node type for content items'),
    '#required' => TRUE,
    '#options' => $filter_node_options,
    '#default_value' => variable_get('joomla_default_blog_nodetype', JOOMLA_DEFAULT_BLOG_NODETYPE),
  );
  $lang_options = language_list();
  $langs['und'] = 'None (undefined)';
  foreach ($lang_options as $code => $lang) {
    $langs[$code] = $lang->name;
  }
  $form['joomla_settings_content']['joomla_default_language'] = array(
    '#type' => 'select',
    '#title' => t('Language to import your content to'),
    '#required' => TRUE,
    '#options' => $langs,
    '#default_value' => variable_get('joomla_default_language', LANGUAGE_NONE),
  );
  $formats = array();
  foreach (filter_formats() as $key => $format) {
    $formats[$key] = $format->name;
  }
  $form['joomla_settings_content']['joomla_input_format'] = array(
    '#type' => 'select',
    '#title' => t('Input Format'),
    '#default_value' => variable_get('joomla_input_format', JOOMLA_INPUT_FORMAT),
    '#options' => $formats,
    '#description' => t('The filter format selected below will be applied to all imported content and comments.'),
  );
  $form['joomla_settings_content']['joomla_img_folder'] = array(
    '#type' => 'textfield',
    '#title' => 'Image/Picture folder',
    '#default_value' => variable_get('joomla_img_folder', JOOMLA_IMG_FOLDER),
    '#description' => "A folder to save any images from Joomla contents. This folder related to Drupal 'files' folder, i.e: if you enter '<b>images</b>' then all imported images will be save to Drupal '<b>files/images</b>'."
  );
  if ((bool) db_query_range('SELECT 1 FROM {joomla_categories}', 0, 1)->fetchField()) {
    db_set_active('joomla');
    foreach (field_info_instances('node', $bundle) as $field_name => $field) {
      $node_fields[$field_name] = $field['label'];
    }
    $vocabularies = taxonomy_vocabulary_load_multiple(FALSE);
    foreach ($vocabularies as $vocabulary) {
      $form['joomla_settings_content']['joomla_field_' . $vocabulary->machine_name] = array(
        '#type' => 'select',
        '#title' => t('Field to store @name associations', array('@name' => $vocabulary->name)),
        '#options' => $node_fields,
        '#empty_value' => FALSE,
        '#default_value' => variable_get('joomla_field_' . $vocabulary->machine_name, JOOMLA_REAL_NAME_FIELD),
      );
    }
  }
  $weight++;
  $form['joomla_settings_user'] = array(
    '#type' => 'fieldset',
    '#weight' => $weight,
    '#title' => t('User settings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );
  $user_fields = array();
  foreach (field_info_instances('user', 'user') as $field_name => $field) {
    $user_fields[$field_name] = $field['label'];
  }
  $form['joomla_settings_user']['joomla_real_name_field'] = array(
    '#type' => 'select',
    '#title' => t('Field to use to import user Real Name to'),
    '#options' => $user_fields,
    '#empty_value' => FALSE,
    '#default_value' => variable_get('joomla_real_name_field', JOOMLA_REAL_NAME_FIELD),
  );
  return system_settings_form($form);
}

/**
 * Import form.
 */
function joomla_import_form($form, &$form_state) {
  if (!joomla_database_test()) {
    $form['error'] = array(
      '#markup' => '<p>' . t('The joomla database settings are not currently valid. Please set the correct database settings at <a href="@url">Joomla to Drupal settings</a> page', array('@url' => url('admin/config/content/joomla'))) . '</p>',
    );
    return $form;
  }
  $form = joomla_import_form_checkboxes($form_state);
  $form['joomla_update_submit'] = array(
    '#type' => 'submit',
    '#value' => t('Import'),
  );
  return $form;
}

/**
 * These checkboxes are used on both the admin and import forms.
 */
function joomla_import_form_checkboxes(&$form_state = NULL) {
  $form['joomla_import'] = array(
    '#type' => 'fieldset',
    '#title' => t('Items to import'),
    '#collapsible' => FALSE,
    '#collapsed' => FALSE,
  );
  $form['joomla_import']['joomla_import_content'] = array(
    '#type' => 'checkbox',
    '#title' => t('Import content'),
    '#default_value' => variable_get('joomla_import_content', JOOMLA_IMPORT_CONTENT),
  );
  $form['joomla_import']['joomla_import_categories'] = array(
    '#type' => 'checkbox',
    '#title' => t('Import categories'),
    '#default_value' => variable_get('joomla_import_categories', JOOMLA_IMPORT_CATEGORIES),
  );
  $form['joomla_import']['joomla_import_users'] = array(
    '#type' => 'checkbox',
    '#title' => t('Import users'),
    '#default_value' => variable_get('joomla_import_users', JOOMLA_IMPORT_USERS),
  );
  $form['joomla_import']['joomla_import_comments'] = array(
    '#type' => 'checkbox',
    '#title' => t('Import comments'),
    '#default_value' => variable_get('joomla_import_comments', JOOMLA_IMPORT_COMMENTS),
    '#description' => t('Check this only if you use JComments in your joomla installation'),
  );
  $form['joomla_update_duplicate'] = array(
    '#type' => 'checkbox',
    '#title' => t('Update previously imported items?'),
    '#description' => t('If selected, any items which have already been imported, and which have been updated on the Joomla website, will be updated.'),
    '#default_value' => variable_get('joomla_update_duplicate', JOOMLA_UPDATE_DUPLICATE),
  );
  return $form;
}

/**
 * Submit import form.
 */
function joomla_import_form_submit($form, &$form_state) {
  $joomla_update_duplicate = (bool) $form_state['values']['joomla_update_duplicate'];
  $jos = array();
  $jos['users'] = (bool) $form_state['values']['joomla_import_users'];
  $jos['comments'] = (bool) $form_state['values']['joomla_import_comments'];
  $jos['categories'] = (bool) $form_state['values']['joomla_import_categories'];
  $jos['content'] = (bool) $form_state['values']['joomla_import_content'];
  $op = !empty($jos) ? array('joomla_batch_save', array($jos, $joomla_update_duplicate)) : NULL;
  db_set_active();
  $batch = array(
    'title' => t('Importing'),
    'operations' => array($op),
    'progress_message' => t('Importing joomla content, please be patient...'),
    'finished' => 'joomla_batch_finished',
    'file' => drupal_get_path('module', 'joomla') . '/joomla.batch.inc',
  );
  batch_set($batch);
}

/**
 *
 */
function joomla_replace_mos_image($images_source, $text_source) {
  $joomla_img_folder       = variable_get('joomla_img_folder', JOOMLA_IMG_FOLDER);
  $joomla_path             = variable_get('joomla_path', JOOMLA_PATH);
  $images = array();
  $images = explode("\n", $images_source);
  $image_string = '{mosimage}';
  $n=0;
  $images_items =array();
  while (!(strpos($text_source, $image_string) === FALSE))  {
    $images_items = explode("|", $images[$n]);
    if (!file_exists('public://' . $joomla_img_folder)) {
      mkdir('public://' . $joomla_img_folder);
    }
    if (dirname($images_items[0])) {
      if (!file_exists('public://' . $joomla_img_folder . '/' . dirname($images_items[0]))) {
        mkdir('public://' . $joomla_img_folder . '/' . dirname($images_items[0]));
      }
    }
    copy($joomla_path . '/images/stories/' . $images_items[0], "public://$joomla_img_folder/" . $images_items[0]);
    $images_replace = '<img src="' . base_path() . variable_get('file_public_path', conf_path() . '/files') . "/$joomla_img_folder/{$images_items[0]}" . '"'
                 . ' align="' . $images_items[1] . '" title="' . $images_items[2] . '" alt="' . $images_items[2] . '"/>';
    $text_source = substr_replace($text_source, $images_replace, strpos($text_source, $image_string), 10) ;
    $n++;
  }
  return $text_source;
}

/**
 *
 */
function joomla_replace_image_link($text_source) {
  //Fixs image string: src="images/
  $image_string = 'src="images/';
  $images_replace = 'src="' . base_path() . variable_get('file_public_path', conf_path() . '/files/') . variable_get('joomla_img_folder', JOOMLA_IMG_FOLDER) . '/';
  $text_result = str_replace('src="images/', "$images_replace", $text_source);
  return $text_result;
}

/**
 * Implements hook_form_alter().
 */
function joomla_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'user_login' || $form_id == 'user_login_block') {
    if (isset($form_state['input']['name'])) {
      $last_validator = array_pop($form['#validate']);
      $form['#validate'][] = 'joomla_login_validate';
      $form['#validate'][] = $last_validator;
    }
  }
}

/**
 *
 */
function joomla_login_validate($form, &$form_state) {
  joomla_authenticate($form_state['values'], $form_state['uid']);
}

/**
 *
 */
function joomla_authenticate($form_values = array(), &$form_uid) {
  global $user;
  if (!empty($user->uid) || $form_uid) {
    // User has already sucessfully authenticated
    return;
  }
  if (form_get_errors() || empty($form_values['name']) || empty($form_values['pass'])) {
    return;
  }
  $account = user_load_by_name($form_values['name']);
  // The user doesn't exist
  if (!$account) {
    return;
  }
  // See if the user has a password record from Joomla import
  $joomla_user = db_query('SELECT * FROM {joomla_users} WHERE uid = :uid', array(':uid' => $account->uid))->fetch();
  if (!$joomla_user) {
    return;
  }
  /**
   * If the password doesn't contain a colon, it is an unsalted password.
   * It will have been inserted into the drupal users table during the
   * import, and to get here the Drupal login must have already failed
   * against it, so nothing left to do.
   */
  if (strpos($joomla_user->password, ':')) {
    list($password, $salt) = explode(':', $joomla_user->password, 2);
  }
  else {
    $password = $joomla_user->password;
    $salt='';
  }
  // Check the supplied password against the md5sum
  if (md5($form_values['pass'] . $salt) == $password || (!$salt && md5($form_values['pass']) == $password)) {
    $user = $account;
    watchdog('joomla', 'Converting password for user @name (Joomla id @juid)', array('@name' => $user->name, '@juid' => $joomla_user->juid));
    // Update the users Drupal password
    user_save($user, array('pass' => $form_values['pass']));
    $joomla_user->converted = 1;
    drupal_write_record('joomla_users', $joomla_user, array('uid'));
    $form_uid=$user->uid;
    user_login_finalize($form_values);
    return $user;
  }
}

/**
 * Initialise settings for communicating with the Joomla database. This
 * makes it possible to switch between the Drupal and Joomla databases with
 * db_set_active().
 */
function joomla_database_init() {
  $joomla_db = Database::getConnectionInfo('joomla');
  if (empty($joomla_db)) {
    /**
     * It's not possible to use a combination of database engines, e.g.
     * mysql and mysqli, at the same time.  So, determine which one is
     * in use on the Drupal site and use it for the Joomla connection
     */
    $dbs = Database::getConnectionInfo('default');
    // same engine for two db: Drupal's limit
    $engine = $dbs['default']['driver'];
    $joomla_url = array(
      'database' => variable_get('joomla_database_name', JOOMLA_DATABASE_NAME),
      'username' => variable_get('joomla_database_user', JOOMLA_DATABASE_USER),
      'password' => variable_get('joomla_database_pass', JOOMLA_DATABASE_PASS),
      'host' => variable_get('joomla_database_host', JOOMLA_DATABASE_HOST),
      'port' => variable_get('joomla_database_port', JOOMLA_DATABASE_PORT),
      'prefix' => variable_get('joomla_prefix', JOOMLA_PREFIX),
      'driver' => $engine,
    );
    Database::addConnectionInfo('joomla', 'default', $joomla_url);
  }
}

/**
 * Test whether a valid joomla database has been configured.
 */
function joomla_database_test() {
  $connection = @mysql_connect(variable_get('joomla_database_host', JOOMLA_DATABASE_HOST) . ':' . variable_get('joomla_database_port', JOOMLA_DATABASE_PORT), variable_get('joomla_database_user', JOOMLA_DATABASE_USER), variable_get('joomla_database_pass', JOOMLA_DATABASE_PASS), TRUE, 2);
  if (!$connection) {
    return FALSE;
  }
  if (!mysql_select_db(variable_get('joomla_database_name', JOOMLA_DATABASE_NAME))) {
    return FALSE;
  }
  return TRUE;
}