<?php
// $Id: luceneapi_node.install,v 1.11.2.14 2009/10/03 19:25:38 cpliakas Exp $

/**
 * @file
 * Installation functions for the Search Lucene Content module.
 *
 * @ingroup luceneapi
 */

/**
 * Implementation of hook_uninstall().
 */
function luceneapi_node_uninstall() {

  // clears all cached luceneapi_node search results
  if (db_table_exists('cache_luceneapi')) {
    cache_clear_all('luceneapi_node', 'cache_luceneapi', TRUE);
  }

  // deletes index directory
  $index_path = variable_get(
    'luceneapi_node:index_path',
    file_directory_path() . DIRECTORY_SEPARATOR .'luceneapi_node'
  );
  if (is_dir($index_path)) {
    $nomask = array('RCS', 'SCCS', 'CVS', 'CVS.adm', 'RCSLOG', 'tags', 'TAGS', '.git', '.bzr');
    $files = file_scan_directory($index_path, '.*', $nomask);
    foreach ($files as $file) {
      @unlink($file->filename);
    }
    @unlink(sprintf('%s/.htaccess', $index_path));
    @rmdir($index_path);
  }

  // removes all variables that start with "luceneapi_node:"
  $result = db_query("SELECT name FROM {variable} WHERE name LIKE 'luceneapi_node:%%'");
  while ($row = db_fetch_object($result)) {
    variable_del($row->name);
  }
}

/**
 * Implementation of hook_requirements().
 */
function luceneapi_node_requirements($phase) {
  // Ensure translations don't break at install time
  $t = get_t();

  // if requirements fail for Search Lucene API, this module will still get
  // installed breaking the site.  This code double checks the requirements to
  // get around this bug.  Requirements are only returned on failure.
  // @see http://drupal.org/node/592182
  // @see http://drupal.org/node/592800
  if ('install' == $phase) {

    // bails if Drupal is in the process of being installed
    if (!function_exists('db_query') || (function_exists('install_verify_drupal') && !install_verify_drupal())) {
      return array();
    }

    // makes sure path to luceneapi exists, formats path to "lib" dir
    if ($luceneapi_path = drupal_get_path('module', 'luceneapi')) {
      $lib_dir = sprintf('%s/lib', $luceneapi_path);
    }
    else {
      return array(
        'luceneapi_node' => array(
          'title' => t('Search Lucene Content'),
          'severity' => REQUIREMENT_ERROR,
          'description' => t('Search Lucene Content depends on Search Lucene API.'),
        ),
      );
    }

    // re-tests Search Lucene API requirements
    if (!is_dir("$lib_dir/Zend") || !is_dir("$lib_dir/LuceneAPI") || !extension_loaded('iconv')) {
      return array(
        'luceneapi_node' => array(
          'title' => t('Search Lucene Content'),
          'severity' => REQUIREMENT_ERROR,
          'description' => t('Search Lucene Content depends on Search Lucene API.'),
        ),
      );
    }
  }
}