<?php

/**
 * imap_messages.php
 *
 * Copyright (c) 1999-2002 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * This implements functions that manipulate messages
 *
 * $Id$
 */

/****************************************************************************
 **  Copies specified messages to specified folder
 ****************************************************************************/
function sqimap_messages_copy ($imap_stream, $start, $end, $mailbox) {
    $read = sqimap_run_command ($imap_stream, "COPY $start:$end \"$mailbox\"", true, $response, $message);
}

/****************************************************************************
 **  Deletes specified messages and moves them to trash if possible
 ****************************************************************************/
function sqimap_messages_delete ($imap_stream, $start, $end, $mailbox) {
    global $move_to_trash, $trash_folder, $auto_expunge;

    if (($move_to_trash == true) && (sqimap_mailbox_exists($imap_stream, $trash_folder) && ($mailbox != $trash_folder))) {
        sqimap_messages_copy ($imap_stream, $start, $end, $trash_folder);
        sqimap_messages_flag ($imap_stream, $start, $end, "Deleted");
    } else {
        sqimap_messages_flag ($imap_stream, $start, $end, "Deleted");
    }
}

/****************************************************************************
 **  Sets the specified messages with specified flag
 ****************************************************************************/
function sqimap_messages_flag ($imap_stream, $start, $end, $flag) {
    $read = sqimap_run_command ($imap_stream, "STORE $start:$end +FLAGS (\\$flag)", true, $response, $message);
}


/****************************************************************************
 **  Remove specified flag from specified messages
 ****************************************************************************/
function sqimap_messages_remove_flag ($imap_stream, $start, $end, $flag) {
    $read = sqimap_run_command ($imap_stream, "STORE $start:$end -FLAGS (\\$flag)", true, $response, $message);
}


/****************************************************************************
 **  Returns some general header information -- FROM, DATE, and SUBJECT
 ****************************************************************************/
class small_header {
    var $from = '', $subject = '', $date = '', $to = '', 
        $priority = 0, $message_id = 0, $cc = '';
}

function sqimap_get_small_header ($imap_stream, $id, $sent) {
    $res = sqimap_get_small_header_list($imap_stream, array($id), $sent);
    return $res[0];
}
   
/* Sort the message list and crunch to be as small as possible
 * (overflow could happen, so make it small if possible)
 */
function sqimap_message_list_squisher($messages_array) {
    if( !is_array( $messages_array ) ) {
        return;
    }
    sort($messages_array, SORT_NUMERIC);
    $msgs_str = '';
    while ($messages_array) {
        $start = array_shift($messages_array);
        $end = $start;
        while (isset($messages_array[0]) && $messages_array[0] == $end + 1) {
            $end = array_shift($messages_array);
        }
        if ($msgs_str != '') {
            $msgs_str .= ',';
        }
        $msgs_str .= $start;
        if ($start != $end) {
            $msgs_str .= ':' . $end;
        }
    }
      
    return $msgs_str;
}   

function sqimap_get_small_header_list ($imap_stream, $msg_list, $issent) {
    global $squirrelmail_language, $color, $data_dir, $username;

    /* Get the small headers for each message in $msg_list */
    $sid = sqimap_session_id();
    $maxmsg = sizeof($msg_list);
    $msgs_str = sqimap_message_list_squisher($msg_list);
    $results = array();
    $read_list = array();
    $sizes_list = array();

    /**
     * We need to return the data in the same order as the caller supplied
     * in $msg_list, but IMAP servers are free to return responses in
     * whatever order they wish... So we need to re-sort manually
     */
    for ($i = 0; $i < sizeof($msg_list); $i++) {
        $id2index[$msg_list[$i]] = $i;
    }

    $query = "$sid FETCH $msgs_str BODY.PEEK[HEADER.FIELDS (Date To From Cc Subject Message-Id X-Priority Content-Type)]\r\n";
    fputs ($imap_stream, $query);
    $readin_list = sqimap_read_data_list($imap_stream, $sid, true, $response, $message);

    foreach ($readin_list as $r) {
        if (!eregi("^\\* ([0-9]+) FETCH", $r[0], $regs)) {
            set_up_language($squirrelmail_language);
            echo '<br><b><font color=$color[2]>' .
                  _("ERROR : Could not complete request.") .
                  '</b><br>' .
                  _("Unknown response from IMAP server: ") . ' 1.' .
                  $r[0] . "</font><br>\n";
             /* exit; */
        } else if (! isset($id2index[$regs[1]]) || !count($id2index[$regs[1]])) {
             set_up_language($squirrelmail_language);
             echo '<br><b><font color=$color[2]>' .
                  _("ERROR : Could not complete request.") .
                  '</b><br>' .
                  _("Unknown message number in reply from server: ") .
                  $regs[1] . "</font><br>\n";
             /* exit */
        } else {
             $read_list[$id2index[$regs[1]]] = $r;
        }
    }
    arsort($read_list);
      
    $query = "$sid FETCH $msgs_str RFC822.SIZE\r\n";
    fputs ($imap_stream, $query);
    $sizesin_list = sqimap_read_data_list($imap_stream, $sid, true, $response, $message);
      
    foreach ($sizesin_list as $r) {
        if (!eregi("^\\* ([0-9]+) FETCH", $r[0], $regs)) {
            set_up_language($squirrelmail_language);
            echo "<br><b><font color=$color[2]>\n";
            echo _("ERROR : Could not complete request.");
            echo "</b><br>\n";
            echo _("Unknown response from IMAP server: ") . ' 2.';
            echo $r[0] . "</font><br>\n";
            exit;
        }
        if (!count($id2index[$regs[1]])) {
            set_up_language($squirrelmail_language);
            echo "<br><b><font color=$color[2]>\n";
            echo _("ERROR : Could not complete request.");
            echo "</b><br>\n";
            echo _("Unknown messagenumber in reply from server: ");
            echo $regs[1] . "</font><br>\n";
            exit;
        }
        $sizes_list[$id2index[$regs[1]]] = $r;
    }
    arsort($sizes_list);
      
    for ($msgi = 0; $msgi < $maxmsg; $msgi++) {
        $subject = _("(no subject)");
        $from = _("Unknown Sender");
        $priority = 0;
        $messageid = "<>";
        $cc = "";
        $to = "";
        $date = "";
        $type[0] = "";
        $type[1] = "";
        $read = $read_list[$msgi];

        for ($i = 0; $i < count($read); $i++) {
            if (eregi ("^to:(.*)$", $read[$i], $regs)) {
                /*$to = sqimap_find_displayable_name(substr($read[$i], 3));*/
                $to = $regs[1];
            } else if (eregi ("^from:(.*)$", $read[$i], $regs)) {
                /*$from = sqimap_find_displayable_name(substr($read[$i], 5));*/
                $from = $regs[1];
            } else if (eregi ("^x-priority:(.*)$", $read[$i], $regs)) {
                $priority = trim($regs[1]);
            } else if (eregi ("^message-id:(.*)$", $read[$i], $regs)) {
                $messageid = trim($regs[1]);
            } else if (eregi ("^cc:(.*)$", $read[$i], $regs)) {
                $cc = $regs[1];
            } else if (eregi ("^date:(.*)$", $read[$i], $regs)) {
                $date = $regs[1];
            } else if (eregi ("^subject:(.*)$", $read[$i], $regs)) {
                $subject = htmlspecialchars(trim($regs[1]));
                if ($subject == "") {
                    $subject = _("(no subject)");
                }
            } else if (eregi ("^content-type:(.*)$", $read[$i], $regs)) {
                $type = strtolower(trim($regs[1]));
                if ($pos = strpos($type, ";")) {
                    $type = substr($type, 0, $pos);
                }
                $type = explode("/", $type);
                if (! isset($type[1])) {
                    $type[1] = '';
                }
            }
        }
	$internaldate = getPref($data_dir, $username, 'internal_date_sort');
        if (trim($date) == "" || $internaldate) {
            fputs($imap_stream, "$sid FETCH $msg_list[$msgi] INTERNALDATE\r\n");
            $readdate = sqimap_read_data($imap_stream, $sid, true, $response, $message);
            if (eregi(".*INTERNALDATE \"(.*)\".*", $readdate[0], $regs)) {
                $date_list = explode(" ", trim($regs[1]));
                $date_list[0] = str_replace("-", " ", $date_list[0]);
                $date = implode(" ", $date_list);
            }
        }
        eregi("([0-9]+)[^0-9]*$", $sizes_list[$msgi][0], $regs);
        $size = $regs[1];
         
        $header = new small_header;
        if ($issent == true) {
            $header->from = (trim($to) != '' ? $to : '(' ._("No To Address") . ')');
        } else {
            $header->from = $from;
        }

        $header->date = $date;
        $header->subject = $subject;
        $header->to = $to;
        $header->priority = $priority;
        $header->message_id = $messageid;
        $header->cc = $cc;
        $header->size = $size;
        $header->type0 = $type[0];
        $header->type1 = $type[1];

        $result[] = $header;
    }
    return $result;
}

/****************************************************************************
 **  Returns the flags for the specified messages 
 ****************************************************************************/
function sqimap_get_flags ($imap_stream, $i) {
    $read = sqimap_run_command ($imap_stream, "FETCH $i:$i FLAGS", true, $response, $message);
    if (ereg("FLAGS(.*)", $read[0], $regs)) {
        return explode(' ', trim(ereg_replace('[\\(\\)\\\\]', '', $regs[1])));
    }
    return Array('None');
}

function sqimap_get_flags_list ($imap_stream, $msg_list) {
    $msgs_str = sqimap_message_list_squisher($msg_list);
    for ($i = 0; $i < sizeof($msg_list); $i++) {
        $id2index[$msg_list[$i]] = $i;
    }
    $result_list = sqimap_run_command_list ($imap_stream, "FETCH $msgs_str FLAGS", true, $response, $message);
    $result_flags = array();

    for ($i = 0; $i < sizeof($result_list); $i++) {
        if (eregi("^\\* ([0-9]+).*FETCH.*FLAGS(.*)", $result_list[$i][0], $regs)
          && isset($id2index[$regs[1]]) && count($id2index[$regs[1]])) {
            $result_flags[$id2index[$regs[1]]] = explode(" ", trim(ereg_replace('[\\(\\)\\\\]', '', $regs[2])));
        } else {
            set_up_language($squirrelmail_language);
            echo "<br><b><font color=$color[2]>\n" .
                 _("ERROR : Could not complete request.") .
                 "</b><br>\n" .
                 _("Unknown response from IMAP server: ") .
                 $result_list[$i][0] . "</font><br>\n";
            exit;
        }
    }
    arsort($result_flags);
    return $result_flags;
}

/****************************************************************************
 **  Returns a message array with all the information about a message.  See
 **  the documentation folder for more information about this array.
 ****************************************************************************/
function sqimap_get_message ($imap_stream, $id, $mailbox) {
    $header = sqimap_get_message_header($imap_stream, $id, $mailbox);
    return sqimap_get_message_body($imap_stream, $header);
}

/****************************************************************************
 **  Wrapper function that reformats the header information.
 ****************************************************************************/
function sqimap_get_message_header ($imap_stream, $id, $mailbox) {
    $read = sqimap_run_command ($imap_stream, "FETCH $id:$id BODY[HEADER]", true, $response, $message);
     
    $header = sqimap_get_header($imap_stream, $read); 
    $header->id = $id;
    $header->mailbox = $mailbox;

    return $header;
}

/****************************************************************************
 **  Wrapper function that reformats the entity header information.
 ****************************************************************************/
function sqimap_get_ent_header ($imap_stream, $id, $mailbox, $ent) {
    $read = sqimap_run_command ($imap_stream, "FETCH $id:$id BODY[$ent.HEADER]", true, $response, $message);
    $header = sqimap_get_header($imap_stream, $read); 
    $header->id = $id;
    $header->mailbox = $mailbox;
    return $header;
}


/****************************************************************************
 **  Wrapper function that returns entity headers for use by decodeMime
 ****************************************************************************/
/*
function sqimap_get_entity_header ($imap_stream, &$read, &$type0, &$type1, &$bound, &$encoding, &$charset, &$filename) {
    $header = sqimap_get_header($imap_stream, $read);
    $type0 = $header["TYPE0"]; 
    $type1 = $header["TYPE1"];
    $bound = $header["BOUNDARY"];
    $encoding = $header["ENCODING"];
    $charset = $header["CHARSET"];
    $filename = $header["FILENAME"];
}
*/

/****************************************************************************
 **  Queries the IMAP server and gets all header information.
 ****************************************************************************/
function sqimap_get_header ($imap_stream, $read) {
    global $where, $what;

    $hdr = new msg_header();
    $i = 0;
    /* Set up some defaults */
    $hdr->type0 = "text";
    $hdr->type1 = "plain";
    $hdr->charset = "us-ascii";

    while ($i < count($read)) {
        if (substr($read[$i], 0, 17) == "MIME-Version: 1.0") {
            $hdr->mime = true;
            $i++;
        }

        /** ENCODING TYPE **/
        else if (substr(strtolower($read[$i]), 0, 26) == "content-transfer-encoding:") {
            $hdr->encoding = strtolower(trim(substr($read[$i], 26)));
            $i++;
        }

         /** CONTENT-TYPE **/
         else if (strtolower(substr($read[$i], 0, 13)) == "content-type:") {
            $cont = strtolower(trim(substr($read[$i], 13)));
            if (strpos($cont, ";")) {
                $cont = substr($cont, 0, strpos($cont, ";"));
            }


            if (strpos($cont, "/")) {
                $hdr->type0 = substr($cont, 0, strpos($cont, "/"));
                $hdr->type1 = substr($cont, strpos($cont, "/")+1);
            } else {
                $hdr->type0 = $cont;
            }


            $line = $read[$i];
            $i++;
            while ( (substr(substr($read[$i], 0, strpos($read[$i], " ")), -1) != ":") && (trim($read[$i]) != "") && (trim($read[$i]) != ")")) {
                str_replace("\n", "", $line);
                str_replace("\n", "", $read[$i]);
                $line = "$line $read[$i]";
                $i++;
            }

            /** Detect the boundary of a multipart message **/
            if (eregi('boundary="([^"]+)"', $line, $regs)) {
                $hdr->boundary = $regs[1];
            }

            /** Detect the charset **/
            if (strpos(strtolower(trim($line)), "charset=")) {
                $pos = strpos($line, "charset=") + 8;
                $charset = trim($line);
                if (strpos($line, ";", $pos) > 0) {
                    $charset = substr($charset, $pos, strpos($line, ";", $pos)-$pos);
                } else {
                    $charset = substr($charset, $pos);
                }
                $charset = str_replace("\"", "", $charset);
                $hdr->charset = $charset;
            } else {
                $hdr->charset = "us-ascii";
            }
        }

        else if (strtolower(substr($read[$i], 0, 20)) == "content-disposition:") {
            /** Add better dontent-disposition support **/
            
            $line = $read[$i];
            $i++;
            while ( (substr(substr($read[$i], 0, strpos($read[$i], " ")), -1) != ":") && (trim($read[$i]) != "") && (trim($read[$i]) != ")")) {
                str_replace("\n", "", $line);
                str_replace("\n", "", $read[$i]);
                $line = "$line $read[$i]";
                $i++;
            }

            /** Detects filename if any **/
            if (strpos(strtolower(trim($line)), "filename=")) {
                $pos = strpos($line, "filename=") + 9;
                $name = trim($line);
                if (strpos($line, " ", $pos) > 0) {
                   $name = substr($name, $pos, strpos($line, " ", $pos));
                } else {
                   $name = substr($name, $pos);
                }
                $name = str_replace("\"", "", $name);
                $hdr->filename = $name;
            }
        }

        /** REPLY-TO **/
        else if (strtolower(substr($read[$i], 0, 9)) == "reply-to:") {
            $hdr->replyto = trim(substr($read[$i], 9, strlen($read[$i])));
            $i++;
        }

        /** FROM **/
        else if (strtolower(substr($read[$i], 0, 5)) == "from:") {
            $hdr->from = trim(substr($read[$i], 5, strlen($read[$i]) - 6));
            if (! isset($hdr->replyto) || $hdr->replyto == "") {
                $hdr->replyto = $hdr->from;
            }
            $i++;
        }
        /** DATE **/
        else if (strtolower(substr($read[$i], 0, 5)) == "date:") {
            $d = substr($read[$i], 5);
            $d = trim($d);
            $d = strtr($d, array('  ' => ' '));
            $d = explode(' ', $d);
            $hdr->date = getTimeStamp($d);
            $i++;
        }
        /** SUBJECT **/
        else if (strtolower(substr($read[$i], 0, 8)) == "subject:") {
            $hdr->subject = trim(substr($read[$i], 8, strlen($read[$i]) - 9));
            if (strlen(Chop($hdr->subject)) == 0) {
               $hdr->subject = _("(no subject)");
            }
            
            /*  
            if ($where == 'SUBJECT') {
                 $hdr->subject = $what;
                 // $hdr->subject = eregi_replace($what, "<b>\\0</b>", $hdr->subject);
            }
            */
            
            $i++;
        }
        /** CC **/
        else if (strtolower(substr($read[$i], 0, 3)) == "cc:") {
            $pos = 0;
            $hdr->cc[$pos] = trim(substr($read[$i], 4));
            $i++;
            while (((substr($read[$i], 0, 1) == " ") || (substr($read[$i], 0, 1) == "\t"))  && (trim($read[$i]) != "")){
                $pos++;
                $hdr->cc[$pos] = trim($read[$i]);
                $i++;
            }
        }
        /** BCC **/
        else if (strtolower(substr($read[$i], 0, 4)) == "bcc:") {
            $pos = 0;
            $hdr->bcc[$pos] = trim(substr($read[$i], 5));
            $i++;
            while (((substr($read[$i], 0, 1) == " ") || (substr($read[$i], 0, 1) == "\t"))  && (trim($read[$i]) != "")){
                $pos++;
                $hdr->bcc[$pos] = trim($read[$i]);
                $i++;
            }
        }
        /** TO **/
        else if (strtolower(substr($read[$i], 0, 3)) == "to:") {
            $pos = 0;
            $hdr->to[$pos] = trim(substr($read[$i], 4));
            $i++;
            while (((substr($read[$i], 0, 1) == " ") || (substr($read[$i], 0, 1) == "\t"))  && (trim($read[$i]) != "")){
                $pos++;
                $hdr->to[$pos] = trim($read[$i]);
                $i++;
            }
        }
        /** MESSAGE ID **/
        else if (strtolower(substr($read[$i], 0, 11)) == "message-id:") {
            $hdr->message_id = trim(substr($read[$i], 11));
            $i++;
        }


        /** ERROR CORRECTION **/
        else if (substr($read[$i], 0, 1) == ")") {
            if (strlen(trim($hdr->subject)) == 0) {
                $hdr->subject = _("(no subject)");
            }
            if (strlen(trim($hdr->from)) == 0) {
                $hdr->from = _("(unknown sender)");
            }
            if (strlen(trim($hdr->date)) == 0) {
                $hdr->date = time();
            }
            $i++;
        }
        /** X-PRIORITY **/
        else if (strtolower(substr($read[$i], 0, 11)) == "x-priority:") {
            $hdr->priority = trim(substr($read[$i], 11));
            $i++;
        }
        else {
            $i++;
        }
     }
     return $hdr;
}


/****************************************************************************
 **  Returns the body of a message.
 ****************************************************************************/
function sqimap_get_message_body ($imap_stream, &$header) {
    $id = $header->id;
    return decodeMime($imap_stream, $header);
}


/****************************************************************************
 **  Returns an array with the body structure 
 ****************************************************************************/
?>