<?php

/**
 * abook_local_file.php
 *
 * Copyright (c) 1999-2002 The Squirrelmail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * Backend for addressbook as a pipe separated file
 *
 * An array with the following elements must be passed to
 * the class constructor (elements marked ? are optional):
 *
 * NOTE. This class should not be used directly. Use the
 *       "AddressBook" class instead.
 *
 * Make sure you configure this before using it!
 *
 * $Id$
 */

class abook_global_file extends addressbook_backend {
    var $btype = 'local';
    var $bname = 'global_file';

    var $filehandle = 0;

    /* ========================== Private ======================= */

    /* Constructor */
    function abook_global_file() {
        global $address_book_global_filename;
        $this->global_filename = $address_book_global_filename;
      
        $this->sname = _("Global address book");
 
        $this->open(true);
    }

    /* Open the addressbook file and store the file pointer.
     * Use $file as the file to open, or the class' own 
     * filename property. If $param is empty and file is  
     * open, do nothing. */
    function open($new = false) {
        $this->error = '';

        /* Return true is file is open and $new is unset */
        if($this->filehandle && !$new) {
            return true;
        }
 
        /* Check that new file exists */
        if (! file_exists($this->global_filename) || 
            ! is_readable($this->global_filename)) {
            return $this->set_error($this->global_filename . ': ' .
                _("No such file or directory"));
        }
 
        /* Close old file, if any */
        if ($this->filehandle) {
            $this->close();
        }
        
        /* Open file, read only. */
        $fh = @fopen($this->global_filename, 'r');
        $this->writeable  = false;
        if(! $fh) {
            return $this->set_error($this->global_filename . ': ' . 
                _("Open failed"));
        }
 
        $this->filehandle = &$fh;
        return true;
    }

    /* Close the file and forget the filehandle */
    function close() {
        @fclose($this->filehandle);
        $this->filehandle = 0;
        $this->global_filename   = '';
        $this->writable   = false;
    }

    /* ========================== Public ======================== */
    
    /* Search the file */
    function search($expr) {

        /* To be replaced by advanded search expression parsing */
        if(is_array($expr)) {
            return;
        }
 
        /* Make regexp from glob'ed expression
         * May want to quote other special characters like (, ), -, [, ], etc. */
        $expr = str_replace('?', '.', $expr);
        $expr = str_replace('*', '.*', $expr);
 
        $res = array();
        if(!$this->open()) {
            return false;
        }
 
        @rewind($this->filehandle);
        
        while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
            $line = join(' ', $row);
            if (eregi($expr, $line)) {
                $res[] = array('nickname'  => $row[0],
                               'name'      => $row[1] . ' ' . $row[2],
                               'firstname' => $row[1],
                               'lastname'  => $row[2],
                               'email'     => $row[3],
                               'label'     => $row[4],
                               'backend'   => $this->bnum,
                               'source'    => &$this->sname);
            }
        }
        
        return $res;
    }
    
    /* Lookup alias */
    function lookup($alias) {
        if (empty($alias)) {
            return array();
        }
 
        $alias = strtolower($alias);
        
        $this->open();
        @rewind($this->filehandle);
        
        while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
            if (strtolower($row[0]) == $alias) {
                return array('nickname'  => $row[0],
                             'name'      => $row[1] . ' ' . $row[2],
                             'firstname' => $row[1],
                             'lastname'  => $row[2],
                             'email'     => $row[3],
                             'label'     => $row[4],
                             'backend'   => $this->bnum,
                             'source'    => &$this->sname);
            }
        }
      
        return array();
    }

    /* List all addresses */
    function list_addr() {
        $res = array();
        $this->open();
        @rewind($this->filehandle);
        
        while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
            $res[] = array('nickname'  => $row[0],
                           'name'      => $row[1] . ' ' . $row[2],
                           'firstname' => $row[1],
                           'lastname'  => $row[2],
                           'email'     => $row[3],
                           'label'     => $row[4],
                           'backend'   => $this->bnum,
                           'source'    => &$this->sname);
        }
        return $res;
    }

    /* Add address */
    function add($userdata) {
        $this->set_error(_("Can not modify global address book"));
        return false;
    }

    /* Delete address */
    function remove($alias) {
        $this->set_error(_("Can not modify global address book"));
        return false;
    }

    /* Modify address */
    function modify($alias, $userdata) {
        $this->set_error(_("Can not modify global address book"));
        return false;
    }
     
} /* End of class abook_local_file */
?>