<?php

/**
 * @file
 * Installation code for iTweakUpload.
 */

/**
 * Helper function to add a permission to a role.
 */
function _itweak_upload_add_permission($rid, $permission) {
  if ($permission) {
    $current_perm = db_result(db_query("SELECT perm FROM {permission} WHERE rid = %d", $rid));
    if ($current_perm != '') {
      $current_perm .= ', ';
    }
    $current_perm .= $permission;
//    db_query("UPDATE {permission} SET perm = '%s' WHERE rid = %d", $current_perm, $rid);
    return update_sql("UPDATE {permission} SET perm = '$current_perm' WHERE rid = $rid");
  }
}

/*
 * Install ImageCache presets
 */
function _itweak_upload_install_imagecache_presets() {
  $ret = array();
  if (!module_exists('imagecache')) {
    $msg = t('Tried installing ImageCache preset for iTweak Upload module, but ImageCache module is not present. ImageCache presets for iTweak Upload module were not installed.');
//    drupal_set_message($msg);
    $ret[] = array('success' => FALSE, 'query' => $msg);
  }
  else {
    $imagecache_presets = array(
      array(
        'presetname' => 'AttachmentThumbnail',
      ),
    );

    $perms = array();
    foreach ($imagecache_presets as $preset) {
      $perms[] = 'view imagecache ' . $preset['presetname'];
    }

    // Add default permissions to new presets
    if (count($perms)) {
      // Which roles ids should be allowed to view the preset by default:
      $allow_roles = array(1, 2);

      // Get role names
      $result = db_query('SELECT r.rid, r.name FROM {role} r WHERE r.rid IN (%s)', implode(', ', $allow_roles));
      $roles = array();
      while ($role = db_fetch_object($result)) {
        $roles[$role->rid] = $role->name;
      }
      $perms = implode(', ', $perms);
      foreach ($roles as $rid => $role) {
        $res = _itweak_upload_add_permission($rid, $perms);
        if ($res['success']) {
          $res['query'] = t('Added permissions "%perms" to role %role.', array('%perms' => $perms, '%role' => $role) );
        }
        $ret[] = $res;
      }
    }
  }
  return $ret;
}

/**
 * Implementation of hook_install()
 */
function itweak_upload_install() {
  db_query("UPDATE {system} SET weight = -10 WHERE name = 'itweak_upload'");
  $ret = _itweak_upload_install_imagecache_presets();
  if (!$ret[0]['success']) drupal_set_message($ret[0]['query']);

//??  cache_clear_all('theme_registry', 'cache', TRUE);
}

/**
 * Implementation of hook_update_N()
 */
function itweak_upload_update_6000() {
  $ret = array();
  $ret += _itweak_upload_install_imagecache_presets();
  return $ret;
}

/**
 * Implementation of hook_update_N()
 */
function itweak_upload_update_6001() {
  $ret = array();
  $ret[] = update_sql("UPDATE {system} SET weight = 10 WHERE name = 'itweak_upload'");
  return $ret;
}

/**
 * Implementation of hook_update_N()
 * iTweak Upload now needs to be earliest within all modules, so it can act upon file deletion and clear imagecache.
 */
function itweak_upload_update_6002() {
  $ret = array();
  $ret[] = update_sql("UPDATE {system} SET weight = -10 WHERE name = 'itweak_upload'");
  return $ret;
}

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

  switch ($phase) {
    case 'install':
      $error = FALSE;
//      if (!module_exists('content_copy')) {
//        $error = TRUE;
//        $value = $t('Content Copy module to be pre-installed.');
//        $severity = REQUIREMENT_ERROR;
//      }

      if (!module_exists('imagecache')) {
        if ($error) {
          $value .= ' ';
        } else {
          $error = TRUE;
          $value = '';
        }
        $value .= $t('ImageCache module to be pre-installed.');
        $severity = REQUIREMENT_ERROR;
      }

//      if ($error) {
//        $requirements['cck_gallery'] = array(
//          'title' => $t('CCK Gallery requirements'),
//          'value' => $value . $t(' If the required modules are now installed, please enable CCK Gallery again.'),
//          'severity' => $severity,
//        );
//      }
      break;

    // Check progress bar capability
    case 'runtime':
      if (!module_exists('filefield')) {
      // This code copied verbatim from filefield.install
      // We don't want to repeat axact same message twice
        $implementation = itweak_upload_progress_implementation();
        $apache = strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== FALSE;
        $fastcgi = strpos($_SERVER['SERVER_SOFTWARE'], 'mod_fastcgi') !== FALSE || strpos($_SERVER["SERVER_SOFTWARE"], 'mod_fcgi') !== FALSE;
        $php_52 = version_compare(phpversion(), '5.2.0', '>');
        $description = NULL;
        if (!$apache || !$php_52) {
          $value = $t('Not enabled');
          $description = $t('Your server is not capable of displaying file upload progress. File upload progress requires PHP 5.2 and an Apache server.');
          $severity = REQUIREMENT_INFO;
        }
        elseif ($fastcgi) {
          $value = $t('Not enabled');
          $description = $t('Your server is not capable of displaying file upload progress. File upload progress requires PHP be run with mod_php and not as FastCGI.');
          $severity = REQUIREMENT_INFO;
        }
        elseif (!$implementation && extension_loaded('apc')) {
          $value = $t('Not enabled');
          $description = $t('Your server is capable of displaying file upload progress through APC, but it is not enabled. Add <code>apc.rfc1867 = 1</code> to your php.ini configuration. Alternatively, it is recommended to use <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress</a>, which supports more than one simultaneous upload.');
          $severity = REQUIREMENT_WARNING;
        }
        elseif (!$implementation) {
          $value = $t('Not enabled');
          $description = t('Your server is capable of displaying file upload progress, but does not have the required libraries. It is recommended to install the <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress library</a> (preferred) or to install <a href="http://us2.php.net/apc">APC</a>.');
          $severity = REQUIREMENT_WARNING;
        }
        elseif ($implementation == 'apc') {
          $value = $t('Enabled (<a href="http://php.net/manual/en/apc.configuration.php#ini.apc.rfc1867">APC RFC1867</a>)');
          $description = t('Your server is capable of displaying file upload progress using APC RFC1867. Note that only one upload at a time is supported. It is recommended to use the <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress library</a> if possible.');
          $severity = REQUIREMENT_OK;
        }
        elseif ($implementation == 'uploadprogress') {
          $value = $t('Enabled (<a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress</a>)');
          $severity = REQUIREMENT_OK;
        }
        $requirements['itweak_upload_progress'] = array(
          'title' => $t('Upload progress'),
          'value' => $value,
          'severity' => $severity,
          'description' => $description,
        );
      }
    break;

  }

  return $requirements;
}

/**
 * Implementation of hook_uninstall()
 */
function itweak_upload_uninstall() {
  //remove system variables
  db_query("DELETE FROM {variable} WHERE name LIKE 'itweak_upload_%'");
  cache_clear_all('variables', 'cache');
}