<?php

/**
 * left_main.php
 *
 * Copyright (c) 1999-2002 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * This is the code for the left bar. The left bar shows the folders
 * available, and has cookie information.
 *
 * $Id: left_main.php,v 1.128 2002/04/19 03:58:17 graf25 Exp $
 */

require_once('../src/validate.php');
require_once('../functions/array.php');
require_once('../functions/imap.php');
require_once('../functions/plugin.php');
require_once('../functions/page_header.php');

/* These constants are used for folder stuff. */
define('SM_BOX_UNCOLLAPSED', 0);
define('SM_BOX_COLLAPSED',   1);

/* --------------------- FUNCTIONS ------------------------- */

function formatMailboxName($imapConnection, $box_array) {

    global $folder_prefix, $trash_folder, $sent_folder,
           $color, $move_to_sent, $move_to_trash,
           $unseen_notify, $unseen_type, $collapse_folders,
           $draft_folder, $save_as_draft,
           $use_special_folder_color;

    $real_box = $box_array['unformatted'];
    $mailbox = str_replace('&nbsp;','',$box_array['formatted']);
    $mailboxURL = urlencode($real_box);

    /* Strip down the mailbox name. */
    if (ereg("^( *)([^ ]*)$", $mailbox, $regs)) {
        $mailbox = $regs[2];
    }

    $unseen = 0;

    if (($unseen_notify == 2 && $real_box == 'INBOX') ||
        $unseen_notify == 3) {
        $unseen = sqimap_unseen_messages($imapConnection, $real_box);
        if ($unseen_type == 1 && $unseen > 0) {
            $unseen_string = "($unseen)";
            $unseen_found = TRUE;
        } else if ($unseen_type == 2) {
            $numMessages = sqimap_get_num_messages($imapConnection, $real_box);
            $unseen_string = "<font color=\"$color[11]\">($unseen/$numMessages)</font>";
            $unseen_found = TRUE;
        }
    }

    $special_color = ($use_special_folder_color && isSpecialMailbox( $real_box ) );

    /* Start off with a blank line. */
    $line = '';

    /* If there are unseen message, bold the line. */
    if ($unseen > 0) { $line .= '<B>'; }

    /* Crate the link for this folder. */
    $line .= "<A HREF=\"right_main.php?PG_SHOWALL=0&amp;sort=0&amp;startMessage=1&amp;mailbox=$mailboxURL\" TARGET=\"right\" STYLE=\"text-decoration:none\">";
    if ($special_color) {
        $line .= "<FONT COLOR=\"$color[11]\">";
    }
    if ( $mailbox == 'INBOX' ) {
        $line .= _("INBOX");
    } else {
        $line .= str_replace(' ','&nbsp;',$mailbox);
    }
    if ($special_color == TRUE)
        $line .= "</FONT>";
    $line .= '</A>';

    /* If there are unseen message, close bolding. */
    if ($unseen > 0) { $line .= "</B>"; }

    /* Print unseen information. */
    if (isset($unseen_found) && $unseen_found) {
        $line .= "&nbsp;<SMALL>$unseen_string</SMALL>";
    }

    if (($move_to_trash) && ($real_box == $trash_folder)) {
        if (! isset($numMessages)) {
            $numMessages = sqimap_get_num_messages($imapConnection, $real_box);
        }

        if ($numMessages > 0) {
            $urlMailbox = urlencode($real_box);
            $line .= "\n<small>\n" .
                    "&nbsp;&nbsp;(<A HREF=\"empty_trash.php\" style=\"text-decoration:none\">"._("purge")."</A>)" .
                    "</small>";
        }
    }

    /* Return the final product. */
    return ($line);
}

/**
 * Recursive function that computes the collapsed status and parent
 * (or not parent) status of this box, and the visiblity and collapsed
 * status and parent (or not parent) status for all children boxes.
 */
function compute_folder_children(&$parbox, $boxcount) {
    global $boxes, $data_dir, $username, $collapse_folders;
    $nextbox = $parbox + 1;

    /* Retreive the name for the parent box. */
    $parbox_name = $boxes[$parbox]['unformatted'];

    /* 'Initialize' this parent box to childless. */
    $boxes[$parbox]['parent'] = FALSE;

    /* Compute the collapse status for this box. */
    if( isset($collapse_folders) && $collapse_folders ) {
        $collapse = getPref($data_dir, $username, 'collapse_folder_' . $parbox_name);
        $collapse = ($collapse == '' ? SM_BOX_UNCOLLAPSED : $collapse);
    } else {
        $collapse = SM_BOX_UNCOLLAPSED;
    }
    $boxes[$parbox]['collapse'] = $collapse;

    /* Otherwise, get the name of the next box. */
    if (isset($boxes[$nextbox]['unformatted'])) {
        $nextbox_name = $boxes[$nextbox]['unformatted'];
    } else {
        $nextbox_name = '';
    }

    /* Compute any children boxes for this box. */
    while (($nextbox < $boxcount) &&
           (is_parent_box($boxes[$nextbox]['unformatted'], $parbox_name))) {

        /* Note that this 'parent' box has at least one child. */
        $boxes[$parbox]['parent'] = TRUE;

        /* Compute the visiblity of this box. */
        $boxes[$nextbox]['visible'] = ($boxes[$parbox]['visible'] &&
                                       ($boxes[$parbox]['collapse'] != SM_BOX_COLLAPSED));

        /* Compute the visibility of any child boxes. */
        compute_folder_children($nextbox, $boxcount);
    }

    /* Set the parent box to the current next box. */
    $parbox = $nextbox;
}

/**
 * Create the link for a parent folder that will allow that
 * parent folder to either be collapsed or expaned, as is
 * currently appropriate.
 */
function create_collapse_link($boxnum) {
    global $boxes;
    $mailbox = urlencode($boxes[$boxnum]['unformatted']);

    /* Create the link for this collapse link. */
    $link = '<a target="left" style="text-decoration:none" ' .
            'href="left_main.php?';
    if ($boxes[$boxnum]['collapse'] == SM_BOX_COLLAPSED) {
        $link .= "unfold=$mailbox\">+";
    } else {
        $link .= "fold=$mailbox\">-";
    }
    $link .= '</a>';

    /* Return the finished product. */
    return ($link);
}

/**
 * This simple function checks if a box is another box's parent.
 */
function is_parent_box($curbox_name, $parbox_name) {
    global $delimiter;

    /* Extract the name of the parent of the current box. */
    $curparts = explode($delimiter, $curbox_name);
    $curname = array_pop($curparts);
    $actual_parname = implode($delimiter, $curparts);
    $actual_parname = substr($actual_parname,0,strlen($parbox_name));

    /* Compare the actual with the given parent name. */
    return ($parbox_name == $actual_parname);
}


/* -------------------- MAIN ------------------------ */

global $delimiter, $default_folder_prefix;

// open a connection on the imap port (143)
$imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 10); // the 10 is to hide the output

/**
 * Using stristr since older preferences may contain "None" and "none".
 */
if (isset($left_refresh) && ($left_refresh != '') &&
    !stristr($left_refresh, "none")){
    $xtra =  "\n<META HTTP-EQUIV=\"Expires\" CONTENT=\"Thu, 01 Dec 1994 16:00:00 GMT\">\n" .
             "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n".
             "<META HTTP-EQUIV=\"REFRESH\" CONTENT=\"$left_refresh;URL=left_main.php\">\n";
} else {
    $xtra = '';
}

displayHtmlHeader( 'SquirrelMail', $xtra );

/* If requested and not yet complete, attempt to autocreate folders. */
if ($auto_create_special && !isset($auto_create_done)) {
    $autocreate = array($sent_folder, $trash_folder, $draft_folder);
    foreach( $autocreate as $folder ) {
        if (($folder != '') && ($folder != 'none')) {
            if ( !sqimap_mailbox_exists($imapConnection, $folder)) {
                sqimap_mailbox_create($imapConnection, $folder, '');
            } else if (!sqimap_mailbox_is_subscribed($imapConnection, $folder)) {
                sqimap_subscribe($imapConnection, $folder);
            }
        }
    }

    /* Let the world know that autocreation is complete! Hurrah! */
    $auto_create_done = TRUE;
    session_register('auto_create_done');
}

echo "\n<BODY BGCOLOR=\"$color[3]\" TEXT=\"$color[6]\" LINK=\"$color[6]\" VLINK=\"$color[6]\" ALINK=\"$color[6]\">\n";

do_hook('left_main_before');

$boxes = sqimap_mailbox_list($imapConnection);

echo '<CENTER><FONT SIZE=4><B>'. _("Folders") . "</B><BR></FONT>\n\n";

if ($date_format != 6) {
    /* First, display the clock. */
    if ($hour_format == 1) {
        $hr = 'G:i';
        if ($date_format == 4) {
            $hr .= ':s';
        }
    } else {
        if ($date_format == 4) {
            $hr = 'g:i:s a';
        } else {
            $hr = 'g:i a';
        }
    }

    switch( $date_format ) {
    case 1:
        $clk = date('m/d/y '.$hr, time());
        break;
    case 2:
        $clk = date('d/m/y '.$hr, time());
        break;
    case 4:
    case 5:
        $clk = date($hr, time());
        break;
    default:
        $clk = substr( getDayName( date( 'w', time() ) ), 0, 3 ) . date( ', ' . $hr, time() );
    }
    $clk = str_replace(' ','&nbsp;',$clk);

    echo '<CENTER><SMALL>' . str_replace(' ','&nbsp;',_("Last Refresh")) .
         ": $clk</SMALL></CENTER>";
}

/* Next, display the refresh button. */
echo '<SMALL>(<A HREF="../src/left_main.php" TARGET="left">'.
     _("refresh folder list") . '</A>)</SMALL></CENTER><BR>';

/* Lastly, display the folder list. */
if ( $collapse_folders ) {
    /* If directed, collapse or uncollapse a folder. */
    if (isset($fold)) {
        setPref($data_dir, $username, 'collapse_folder_' . $fold, SM_BOX_COLLAPSED);
    } else if (isset($unfold)) {
        setPref($data_dir, $username, 'collapse_folder_' . $unfold, SM_BOX_UNCOLLAPSED);
    }
}

/* Prepare do do out collapsedness and visibility computation. */
$curbox = 0;
$boxcount = count($boxes);

/* Compute the collapsedness and visibility of each box. */

while ($curbox < $boxcount) {
    $boxes[$curbox]['visible'] = TRUE;
    compute_folder_children($curbox, $boxcount);
}


for ($i = 0; $i < count($boxes); $i++) {
    if ( $boxes[$i]['visible'] ) {
        $mailbox = $boxes[$i]['formatted'];
        $mblevel = substr_count($boxes[$i]['unformatted'], $delimiter) + 1;

        /* Create the prefix for the folder name and link. */
        $prefix = str_repeat('  ',$mblevel);
        if (isset($collapse_folders) && $collapse_folders && $boxes[$i]['parent']) {
            $prefix = str_replace(' ','&nbsp;',substr($prefix,0,strlen($prefix)-2)).
                      create_collapse_link($i) . '&nbsp;';
        } else {
            $prefix = str_replace(' ','&nbsp;',$prefix);
        }
        $line = "<NOBR><TT>$prefix</TT>";

        /* Add the folder name and link. */
        if (! isset($color[15])) {
            $color[15] = $color[6];
        }

        if (in_array('noselect', $boxes[$i]['flags'])) {
            if( isSpecialMailbox( $boxes[$i]['unformatted']) ) {
                $line .= "<FONT COLOR=\"$color[11]\">";
            } else {
                $line .= "<FONT COLOR=\"$color[15]\">";
            }
            if (ereg("^( *)([^ ]*)", $mailbox, $regs)) {
                $mailbox = str_replace('&nbsp;','',$mailbox);
                $line .= str_replace(' ', '&nbsp;', $mailbox);
            }
            $line .= '</FONT>';
        } else {
            $line .= formatMailboxName($imapConnection, $boxes[$i]);
        }

        /* Put the final touches on our folder line. */
        $line .= "</NOBR><BR>\n";

        /* Output the line for this folder. */
        echo $line;
    }
}

do_hook('left_main_after');
sqimap_logout($imapConnection);

echo "</BODY></HTML>\n";

?>
