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Filename : msgexport.sh
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#!/usr/bin/env php
<?php
/*
 +-----------------------------------------------------------------------+
 | This file is part of the Roundcube Webmail client                     |
 |                                                                       |
 | Copyright (C) The Roundcube Dev Team                                  |
 |                                                                       |
 | Licensed under the GNU General Public License version 3 or            |
 | any later version with exceptions for skins & plugins.                |
 | See the README file for a full license statement.                     |
 +-----------------------------------------------------------------------+
 | Author: Thomas Bruederli <thomas@roundcube.net>                       |
 +-----------------------------------------------------------------------+
*/

define('INSTALL_PATH', realpath(__DIR__ . '/..') . '/' );
ini_set('memory_limit', -1);

require_once INSTALL_PATH.'program/include/clisetup.php';

function print_usage()
{
    print "Usage: msgexport.sh -h imap-host -u user-name -m mailbox name\n";
    print "--host   IMAP host\n";
    print "--user   IMAP user name\n";
    print "--mbox   Folder name, set to '*' for all\n";
    print "--file   Output file\n";
}

function vputs($str)
{
    $out = !empty($GLOBALS['args']['file']) ? STDOUT : STDERR;
    fwrite($out, $str);
}

function progress_update($pos, $max)
{
    $percent = round(100 * $pos / $max);
    vputs(sprintf("%3d%% [%-51s] %d/%d\033[K\r", $percent, @str_repeat('=', $percent / 2) . '>', $pos, $max));
}

function export_mailbox($mbox, $filename)
{
    global $IMAP;

    $IMAP->set_folder($mbox);

    vputs("Getting message list of {$mbox}...");

    $index = $IMAP->index($mbox, null, 'ASC');
    $count = $index->count();
    $index = $index->get();

    vputs("$count messages\n");

    if ($filename) {
        if (!($out = fopen($filename, 'w'))) {
            vputs("Cannot write to output file\n");
            return;
        }
        vputs("Writing to $filename\n");
    }
    else {
        $out = STDOUT;
    }

    for ($i = 0; $i < $count; $i++) {
        $headers = $IMAP->get_message_headers($index[$i]);
        $from = current(rcube_mime::decode_address_list($headers->from, 1, false));

        fwrite($out, sprintf("From %s %s UID %d\n", $from['mailto'], $headers->date, $headers->uid));
        $IMAP->get_raw_body($headers->uid, $out);
        fwrite($out, "\n\n\n");

        progress_update($i+1, $count);
    }
    vputs("\ncomplete.\n");

    if ($filename) {
        fclose($out);
    }
}

// get arguments
$opts = ['h' => 'host', 'u' => 'user', 'p' => 'pass', 'm' => 'mbox', 'f' => 'file'];
$args = rcube_utils::get_opt($opts) + ['host' => 'localhost', 'mbox' => 'INBOX'];

if (!isset($_SERVER['argv'][1]) || $_SERVER['argv'][1] == 'help') {
    print_usage();
    exit;
}
else if (!$args['host']) {
    vputs("Missing required parameters.\n");
    print_usage();
    exit;
}

// prompt for username if not set
if (empty($args['user'])) {
    vputs("IMAP user: ");
    $args['user'] = trim(fgets(STDIN));
}

// prompt for password
$args['pass'] = rcube_utils::prompt_silent("Password: ");


// parse $host URL
$a_host = parse_url($args['host']);
if (!empty($a_host['host'])) {
    $host      = $a_host['host'];
    $imap_ssl  = (isset($a_host['scheme']) && in_array($a_host['scheme'], ['ssl','imaps','tls'])) ? TRUE : FALSE;
    $imap_port = isset($a_host['port']) ? $a_host['port'] : ($imap_ssl ? 993 : 143);
}
else {
    $host      = $args['host'];
    $imap_port = 143;
    $imap_ssl  = false;
}

// instantiate IMAP class
$IMAP = new rcube_imap(null);

// try to connect to IMAP server
if ($IMAP->connect($host, $args['user'], $args['pass'], $imap_port, $imap_ssl)) {
    vputs("IMAP login successful.\n");

    $filename  = null;
    $mailboxes = $args['mbox'] == '*' ? $IMAP->list_folders(null) : [$args['mbox']];

    foreach ($mailboxes as $mbox) {
        if (!empty($args['file'])) {
            $filename = preg_replace('/\.[a-z0-9]{3,4}$/i', '', $args['file']) . asciiwords($mbox) . '.mbox';
        }
        else if ($args['mbox'] == '*') {
            $filename = asciiwords($mbox) . '.mbox';
        }

        if ($args['mbox'] == '*' && in_array(strtolower($mbox), ['junk','spam','trash'])) {
            continue;
        }

        export_mailbox($mbox, $filename);
    }
}
else {
    vputs("IMAP login failed.\n");
}