<?php
/* $Id: webfm_file.inc,v 1.7 2007-10-22 21:43:53 robmilne Exp $ */

/**
 * webfm_mkdir -called from the ajax action - switch case 'mkdir':
 *
 * @param string $source - the source directory path
 * @param string $dest - the destination directory name
 *
 * @ret   bool   -true if the directory is created with 775 permissions
 */
function webfm_mkdir($source, $dest, $rename = FALSE, &$error){
  $mkdir_path = ($source.'/'.$dest);
  if (!is_dir($mkdir_path)) {
    if(@mkdir($mkdir_path)) {
      chmod($mkdir_path, 0775);
      if (!is_writable($mkdir_path))
        $error = 'The directory '.$mkdir_path.' is not writable';
      else
        return TRUE;
    }
  } else if($rename == TRUE) {
    $count = 0;
    while(is_dir($munge_path = ($mkdir_path.'_'.$count))){
      $count++;
    }
    if(@mkdir($munge_path)) {
      chmod($munge_path, 0775);
      if (!is_writable($munge_path))
        $error = 'The directory '.$munge_path.' is not writable';
      else
        return TRUE;
    } else {
      $error = 'mkdir for '.$munge_path.' failed';
    }
  } else {
    $error = 'The directory '.$mkdir_path.' already exists';
  }
  return FALSE;
}

/**
 * webfm_rename -called from the ajax action - switch case 'rename':
 *
 * @param string  $source - the source directory path
 * @param string  $dest - the destination directory name
 * @param bool    $uid - user id
 * @param string &$err_arr - ref to error array for client feedback
 *
 * @ret   bool   -true if the directory/file is renamed and file record(s)
 *                updated if dir/file under db control
 */
function webfm_rename($source, $dest, $uid, &$err_arr) {
  $dest_temp = $dest.'~'; //handle possible case problem
  //File
  //if target is a file and new name isn't already used...
  if(is_file($source) && !is_file($dest)) {
    $file_o = webfm_get_file_record('', $source);
    //if we are admin or owner of target file...
    if(($uid == 1) || ($file_o && ($uid == $file_o->uid))) {
      //check validity of new file name
      $file = new stdClass();
      $file->filename = basename($dest);
      $file->filepath = $source;
      $file->filesize = 0; //avoid fail for size - we're interested in extensions
      if(webfm_enum_validate($file, $err_arr) === FALSE) {
        //illegal file extension
        $err_arr[] = "Invalid name";
        return FALSE;
      }
      //if file is not read-only...rename
      if(rename($source, $dest_temp)) {
        if(!(rename($dest_temp, $dest))) {
          rename($dest_temp, $source);
          $err_arr[] = 'rename '.$source.' fail';
          return FALSE;
        }
      } else {
        $err_arr[] = $source.' read-only';
        return FALSE;
      }
    } else {
      $err_arr[] = "permission denied";
      return FALSE;
    }
    return(webfm_rename_db_file($source, $dest, $err_arr));
  }

  //Directory
  //if target is a directory, new name is a unique path and we are an admin...
  else if(is_dir($source) && !is_dir($dest) && ($uid == 1)) {
    //if the target isn't read-only
    if(rename($source, $dest_temp)) {
      //directory rename is OK, back out, rename db files and rename dir again
      rename($dest_temp, $source);
      if(webfm_rename_db_dir_recur($source, $dest, TRUE, $err_arr)) {
        rename($source, $dest_temp);
        rename($dest_temp, $dest);
      } else {
        $err_arr[] = 'webfm_rename_db_dir_recur error - db may be corrupted';
        drupal_set_message(t('webfm_rename_db_dir_recur error - db may be corrupted'), error);
        return FALSE;
      }
      return TRUE;
    } else {
      $err_arr[] = $source.' read-only';
      return FALSE;
    }
  }
  $err_arr[] = 'rename '.$source.' to '.$dest.' fail';
  return FALSE;
}

function webfm_rename_db_file($source, $dest, &$err_arr) {
  if($fid = webfm_get_fid($source)) {
    if(!webfm_dbupdate_file($fid, $dest)) {
      $err_arr[] = 'webfm_dbupdate_file error - fid: '.$fid;
      return FALSE;
    }
  }
  return TRUE;
}

function webfm_rename_db_dir_recur($source, $dest, $ret, &$err_arr) {
  if($handle = opendir($source)) {
    while(($file = readdir($handle)) !== FALSE) {
      if($file != '.' && $file != '..') {
        $source_item  = $source.'/'.$file;
        $dest_item = $dest.'/'.$file;
        if(is_file($source_item)) {
          if(!(webfm_rename_db_file($source_item, $dest_item, $err_arr)))
            $ret = FALSE;
        } elseif(is_dir($source_item)) {
          $ret = webfm_rename_db_dir_recur($source_item, $dest_item, $ret, $err_arr);
        }
      }
    }
    closedir($handle);
  }
  return $ret;
}

/**
 * webfm_delete - called from the ajax action - switch case 'delete':
 *
 * @param string $source - the source directory path
 * @param bool   $uid - user id
 *
 * @ret   bool   -true if the directory or file is deleted and all file records updated
 */
function webfm_delete($source, $uid, &$err_arr){
  if(is_dir($source)) {
    return webfm_delete_dir_recur($source, $uid, TRUE, $err_arr);
  } else if(is_file($source)) {
    if(!webfm_delete_file($source, $uid, $error)) {
      $err_arr[] = $error;
      return FALSE;
    } else {
      return TRUE;
    }
  }
  return FALSE;
}

function webfm_delete_file($source, $uid, &$error) {
  $file = webfm_get_file_record('', $source);
  if(($uid == 1) || ($file && ($uid == $file->uid))) {
    if(@unlink($source)) {
      if($file && (!webfm_dbdelete_file($file->fid))) {
        $error = 'webfm_dbdelete_file() fail for '.$source;
        return FALSE;
      }
    } else if(file_exists($source)) {
      $error = $source.' could not be deleted';
      return FALSE;
    }
    return TRUE;
  } else {
    $error = "permission denied";
    return FALSE;
  }
}

function webfm_delete_dir_recur($source, $uid, $ret, &$err_arr) {
  if($handle = opendir($source)) {
    while(($file = readdir($handle)) !== FALSE) {
      if($file != '.' && $file != '..') {
        $source_item  = $source.'/'.$file;
        if(is_file($source_item)) {
          if(!(webfm_delete_file($source_item, $uid, $error))) {
            $err_arr[] = $error;
            $ret = FALSE;
          }
        } elseif (is_dir($source_item)) {
          webfm_delete_dir_recur($source_item, $uid, $ret, $err_arr);
        }
      }
    }
    closedir($handle);
  } else {
    $err_arr[] = 'Unable to opendir '.$source;
    return FALSE;
  }
  if(($retn = rmdir($source)) == FALSE)
    $err_arr[] = 'Unable to rmdir '.$source;
  return ($retn == TRUE && $ret == TRUE);
}

/**
 * Move a directory or file and update database
 *
 * @param string  $source - the source directory path
 * @param string  $dest - the destination directory name
 * @param bool    $uid - uid of user making move request
 * @param string &$err_arr - ref to error array for client feedback
 *
 * @ret   bool   -true if any directory change (used to switch client cache)
 *
 */
function webfm_move($source, $dest, $uid, &$err_arr) {
  if(is_dir($source) && $uid == 1) {
    return webfm_move_dir_recur($source, $dest, $uid, FALSE, $err_arr);
  } elseif(is_file($source)) {
    $dest .= '/' . strrev(substr(strrev($source), 0, strpos(strrev($source), '/')));
    return webfm_move_file($source, $dest, $uid, $err_arr);
  }
  return FALSE;
}

function webfm_move_file($source, $dest, $uid, &$err_arr) {
  $file = webfm_get_file_record('', $source);
  //Only admins or owners of file in db can move a file
  if($uid == 1 || ($file && $uid == $file->uid)) {
    if(file_move($source, $dest, FILE_EXISTS_ERROR)) {
      if($file->fid) {
        if(!webfm_dbupdate_file($file->fid, $dest)) {
          $err_arr[] = "db update for fid=".$file->fid." failed";
          return FALSE;
        }
      }
    } else {
      $err_arr[] = "file_move for fid=".$file->fid." failed";
      return FALSE;
    }
    return TRUE;
  } else {
    $err_arr[] = "permission denied";
    return FALSE;
  }
}

function webfm_move_dir_recur($source, $dest, $uid, $ret, &$err_arr) {
  $dest .= '/' . strrev(substr(strrev($source), 0, strpos(strrev($source), '/')));
  if(!is_dir($dest)) {
    if(!(@mkdir($dest))) {
      return FALSE;
    }
    chmod($dest, 0775);
    if (!is_writable($dest)) {
      $err_arr[] = $dest." is not writable";
      @rmdir($dest);
      return FALSE;
    }
  } else {
    //directory already exists (can only occur at topmost directory)
    $err_arr[] = $dest." directory already exists";
    return FALSE;
  }
  //directory built - return true to indicate refresh required
  $ret = TRUE;
  if($handle = opendir($source)) {
    while(false !== ($file = readdir($handle))) {
      if($file != '.' && $file != '..') {
        $source_item = $source.'/'.$file;
        if(is_file($source_item)) {
           // file
           webfm_move_file($source_item, $dest.'/'.$file, $uid, $err_arr);
        } elseif(is_dir($source_item)) {
          // directory
          webfm_move_dir_recur($source_item, $dest, $uid, $ret, $err_arr);
        }
      }
    }
    closedir($handle);
  }
  //clean-up source directory
  @rmdir($source);
  return $ret;
}

/**
 * webfm_insert_file - inserts a file into the webfm_file table
 *
 * @param string  $path - path relative to drupal root
 * @param string &$err_arr - ref to error array for client feedback
 *
 * @return bool - TRUE if query executed successfully, otherwise FALSE
 */
function webfm_insert_file($path, &$err_arr){
  $file = new stdClass();
  $file->filepath = $path;
  if(webfm_enum_validate($file, $err_arr)) {
    if(($ret = webfm_dbinsert_file($file, $err)) === FALSE) {
      $err_arr[] = $err;
    }
    return $ret;
  }
  return FALSE;
}

/**
 * webfm_insert_dir - inserts files into the webfm_file table
 *
 * @param string  $path - path relative to drupal root
 * @param bool    $recur - flag to indicate if recursive operation into sub-dirs
 * @param string &$err_arr - ref to error array for client feedback
 *
 * @return obj - contains error flag and count of successful and failed inserts
 */
function webfm_insert_dir($path, $recur, &$err_arr){
  $result = new stdClass();
  $result->cnt = 0;
  $result->errcnt = 0;
  if($handle = opendir($path)) {
    $bl = array('.', '..', '.svn', '.htaccess');
    while(false !== ($file = readdir($handle))) {
      if(!in_array(strtolower($file), $bl)){
        $file_path = $path.'/'.$file;
        if(is_file($file_path)) {
          // file
          if(!webfm_get_fid($file_path)) {
            // not in db
            if(webfm_insert_file($file_path, $err_arr)) {
              $result->cnt++;
            } else {
            $result->errcnt++;
            }
          }
        } else if($recur && is_dir($file_path)) {
          $nest_result = webfm_insert_dir($file_path, $recur, $err_arr);
          $result->cnt += $nest_result->cnt;
          $result->errcnt += $nest_result->errcnt;
        }
      }
    }
    closedir($handle);
  } else {
    $err_arr[] = 'Cannot open dir '.$path;
  }
  return $result;
}
?>