<?php

/**
 * Message Details plugin - bottom frame with message structure and rfc822 body
 *
 * Plugin to view the RFC822 raw message output and the bodystructure of a message
 *
 * @author Marc Groot Koerkamp
 * @copyright 2002 Marc Groot Koerkamp, The Netherlands
 * @copyright 2002-2011 The SquirrelMail Project Team
 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
 * @version $Id: message_details_bottom.php 14085 2011-01-06 03:16:21Z pdontthink $
 * @package plugins
 * @subpackage message_details
 */
//FIXME: this file uses HTML extensively and eventually needs to be "templatized" (don't echo HTML directly)

/**
 * Include the SquirrelMail initialization file.
 */
require('../../include/init.php');
require(SM_PATH . 'functions/imap_general.php');
require(SM_PATH . 'functions/imap_messages.php');
require(SM_PATH . 'functions/mime.php');

sqgetGlobalVar('get_message_details', $md_action, SQ_GET);

/**
 * Controls display of 8bit symbols in message source
 * @global boolean $msgd_8bit_in_hex;
 */
global $msgd_8bit_in_hex;
$msgd_8bit_in_hex=false;

if (!empty($md_action)) {
    sqgetGlobalVar('passed_id', $passed_id, SQ_GET, NULL, SQ_TYPE_BIGINT);
    if (!sqgetGlobalVar('passed_ent_id', $passed_ent_id, SQ_GET))
        $passed_ent_id = 0;
    sqgetGlobalVar('mailbox', $mailbox, SQ_GET);
    /* 
     * change $unformatted to TRUE if you want to see 
     * message source without formating
     */
    $unformatted = FALSE;
    echo get_message_details($mailbox, $passed_id, $passed_ent_id, $unformatted);
}


// ---------- function definitions ----------

/**
 * Converts 8bit string to hex
 *
 * Replaces 8bit symbols with their hex strings,
 * encloses them in curly brackets and uses different color.
 * @param string $string text
 * @return string
 * @since 1.5.1
 */
function msgd_convert_to_hex($string) {
     global $color;
     return preg_replace("/([\200-\377])/e","'<font color=\"$color[2]\">{'.dechex(ord('\\1')).'}</font>'",$string);
}

/**
 * Calculates id of MIME entity
 * @param string $entString
 * @param integer $direction
 * @return string
 * @access private
 */
function CalcEntity($entString, $direction) {
    $result = $entString;
    if ($direction == -1) {
        $pos = strrpos($entString,'.');
        $result = substr($entString,0,$pos);
    }

    switch ($direction) {
        case 0:
            $pos = strrpos($entString,'.');
            if ($pos === false) {
                $entString++;
                $result= $entString;
            }
            else {
                $level = substr($entString,0,$pos);
                $sublevel = substr($entString,$pos+1);
                $sublevel++;
                $result = "$level".'.'."$sublevel";
            }
            break;
        case 1:
            $result = "$entString".".0";
            break;
        default:
            break;
    }
    return ($result);
}


/**
 * Returns actual message details
 * @param string $mailbox
 * @param string $passed_id
 * @param string $passed_ent_id
 * @param boolean $stripHTML If TRUE, only plain text is returned,
 *                           default is FALSE, wherein output contains
 *                           pretty-HTMLification of message body
 * @return string The formatted message details
 * @access public
 */
function get_message_details($mailbox, $passed_id, $passed_ent_id=0, $stripHTML=FALSE) {
    global $imapServerAddress, $imapPort, $color,$msgd_8bit_in_hex, $username;

    $returnValue = '';

    $imapConnection = sqimap_login($username, false, $imapServerAddress, $imapPort, 0);
    $read = sqimap_mailbox_select($imapConnection, $mailbox);
    if (!empty($passed_ent_id))
        $body = sqimap_run_command($imapConnection, "FETCH $passed_id BODY[$passed_ent_id]",true, $response, $readmessage, TRUE);
    else
        $body = sqimap_run_command($imapConnection, "FETCH $passed_id RFC822",true, $response, $readmessage, TRUE);
    $message_body = '';
    $header = false;
    $mimepart = false;
    $bnd_end = false;
    $messageheader = true;
    $messageheaderstart=false;
    $boundaries = array();
    $entities = array();
    session_unregister("entities");
    $pre = '<b>';
    $end = '</b>';
    $entStr = '';
    $bla ='';
    $content = array ();
    $content_indx = -1;
    $contentset = false;

    $count=count($body);
    $body[$count-1] = substr($body[$count-1], -1);
    for ($i=1; $i < $count; $i++) {
        $line = rtrim($body[$i]);
        if ($line == '') {
            $pre = '';
            $end = '';
            if ($bnd_end) {
                $header = true;
                $mimepart = false;
            } else if ($messageheader) {
                if ($header) {
                    $header=false;
                    $end = '</div><div class="ent_body" id="'.$entStr.'B">';
                }
                $mimepart = -$header;
                $bnd_end = false;
                if ($messageheaderstart) {
                    $messageheaderstart=false;
                }
            } else if ($messageheaderstart) {
                $messageheader= false;
            } else {
                if ($header) {
                    $pre = '';
                    $end = '</div><div class="ent_body" id="'.$entStr.'B">';
                }
                $header = false;
                $mimepart=true;
            }
            $contentset = false;
            $nameset = false;
        } else {
            if (!$header && $messageheader) {
                $messageheaderstart=true;
                if ($pre != '<b>') {
                    $pre = '<i><font color ="'.$color[1].'">';
                    $end = '</i></font>';
                }
            }
            if (!$messageheader && !$header ) {
                $mimepart=true;
            }  else {
                $mimepart=false;
            }
            $pre = '';
            $end = '';
        }
        if (  ( $header || $messageheader) && (preg_match("/^.*boundary=\"?(.+(?=\")|.+).*/i",$line,$reg)) )  {
            $bnd = $reg[1];
            $bndreg = $bnd;
            $bndreg = str_replace("\\","\\\\",$bndreg);
            $bndreg = str_replace("?","\\?",$bndreg);
            $bndreg = str_replace("+","\\+",$bndreg);
            $bndreg = str_replace(".","\\.",$bndreg);
            $bndreg = str_replace("/","\\/",$bndreg);
            $bndreg = str_replace("-","\\-",$bndreg);
            $bndreg = str_replace("(","\\(",$bndreg);
            $bndreg = str_replace(")","\\)",$bndreg);
            
            $boundaries[] = array( 'bnd' => $bnd, 'bndreg' => $bndreg);
            $messageheader = false;
            $messageheaderstart=false;
            $mimepart=false;
            if ($entStr=='') {
                $entStr='0';
            } else {
                $entStr = CalcEntity("$entStr",1);
            }
        }

        if (($line != '' && $line{0} == '-' || $header)  && isset($boundaries[0])) {
            $cnt=count($boundaries)-1;
            $bnd = $boundaries[$cnt]['bnd'];
            $bndreg = $boundaries[$cnt]['bndreg'];

            $regstr = '/^--'."($bndreg)".".*".'/';
            if (preg_match($regstr,$line,$reg) ) {
                $bndlen = strlen($reg[1]);
                $bndend = false;
                if (strlen($line) > ($bndlen + 3)) {
                    if ($line{$bndlen+2} == '-' && $line{$bndlen+3} == '-')
                        $bndend = true;
                }
                if ($bndend) {
                    $entStr = CalcEntity("$entStr",-1);
                    array_pop($boundaries);
                    $pre .= '<b><font color ="'.$color[2].'">';
                    $end .= '</font></b>';
                    $header = true;
                    $mimepart = false;
                    $bnd_end = true;
                    $encoding = '';
                } else {
                    $header = true;
                    $bnd_end = false;
                    $entStr = CalcEntity("$entStr",0);
                    $content_indx++;
                    $content[$content_indx]=array();
                    $content[$content_indx]['ent'] = '<a href="#'."$entStr \">$entStr".'</a>';
                    $pre .= '</div><div class="entheader" id="'.
                        $entStr.'H"><a name="'."$entStr".'"><b><font color="'.$color[2].'">';
                    $end .= '</font></b>';
                    $header = true;
                    $mimepart = false;
                    $encoding = '';
                }
            }  else {
                if ($header) {
                    if (!$contentset && preg_match("/^.*(content-type:)\s*(\w+)\/(\w+).*/i",$line,$reg)) {
                        if (strtolower($reg[2]) == 'message' && strtolower($reg[3]) == 'rfc822') {
                            $messageheader = true;
                        }
                        $content[$content_indx]['type'] = "$reg[2]/$reg[3]";
                        $contentset = true;
                        if ($reg[2] == 'image') {
                            $entities["$entStr"] = array();
                            $entities["$entStr"]['entity'] = $entStr;
                            $entities["$entStr"]['contenttype']=$reg[2].'/'.$reg[3];
                        }
                    } else if (!$nameset && preg_match("/^.*(name=\s*)\"(.*)\".*/i",$line,$reg)) {
                        $name = htmlspecialchars($reg[2]);
                        $content[$content_indx]['name'] = decodeHeader($name);
                        $nameset = true;
                        if (isset($entities["$entStr"])) {
                            $entities["$entStr"]['name'] = urlEncode($reg[2]);
                        }
                    } else if (preg_match("/^.*(content-transfer-encoding:)\s*(\w+-?(\w+)?).*/i",$line,$reg) ) {
                        $encoding = $reg[2];
                        if (isset($entities["$entStr"])) {
                            $entities["$entStr"]['encoding']=$reg[2];
                        }
                        $content[$content_indx]['encoding'] = $encoding;
                        $mimeentity = '';
                    }

                    $pre .= '<b><font color='.$color[7].'">';
                    $end .= '</font></b>';
                    //$mimepart=false;
                }
            }
        }

        if ($stripHTML) {
            $message_body .= $line . "\r\n";
        } else {
            $line = htmlspecialchars($line);
            if ($msgd_8bit_in_hex) $line = msgd_convert_to_hex($line);
            $message_body .= "$pre"."$line"."$end"."\r\n";
        }
    }
    
//$returnValue .= returnTime($start).'<br />';
$xtra = <<<ECHO

<style type="text/css">
<!--
.ent_body {
  display:inline;
}

.header {
  display:inline;
}

.entheader {
  display:inline;
  width:99%;
}
-->
</style>

ECHO;

    if (!$stripHTML) {
        ob_start();
        displayHtmlHeader( _("Message Details"), $xtra, FALSE );
        $returnValue .= ob_get_contents();
        ob_end_clean();
    }

    /* body */
    if (!$stripHTML) {
        $returnValue .= "<body text=\"$color[8]\" bgcolor=\"$color[4]\" link=\"$color[7]\" vlink=\"$color[7]\" alink=\"$color[7]\">\n";
        $returnValue .= '<font face="monospace">'."\n";
        $returnValue .= '<br />'."\n";
    }

    if (count($content) > 0 && !$stripHTML) {
        $returnValue .= '<h2>'._("Bodystructure")."</h2>\n\n";
        $returnValue .= '<table border="1" width="98%"><thead>'.
            '<tr bgcolor="'.$color[7].'">'.
            '<td><b><font color="'.$color[5].'">'._("Entity").'</font></b></td>'.
            '<td><b><font color="'.$color[5].'">'._("Content-Type").'</font></b></td>'.
            '<td><b><font color="'.$color[5].'">'._("Name").'</font></b></td>'.
            '<td><b><font color="'.$color[5].'">'._("Encoding").'</font></b></td>'.
            '</tr>'.
            '</thead><tbody>';
        for ($i = 0; $i < count($content);$i++) {
            $returnValue .= '<tr><td>';
            $returnValue .= $content[$i]['ent'].'</td><td>';
            if (isset($content[$i]['type'])) {
                $returnValue .= $content[$i]['type'];
            } else $returnValue .= 'TEXT/PLAIN';
            $returnValue .= '</td><td>';
            if (isset($content[$i]['name'])) {
                $returnValue .= $content[$i]['name'];
            } else $returnValue .= '&nbsp;';
            $returnValue .= '</td><td>';
            if (isset($content[$i]['encoding'])) {
                $returnValue .= $content[$i]['encoding'];
            } else $returnValue .= '&nbsp;';
            $returnValue .= '</td></tr>'."\n";
        }
        $returnValue .= '</tbody></table><br />'."\n";
    }

    if (!$stripHTML) {
        $returnValue .= '<h2>'._("RFC822 Message body")."</h2>\n\n";
        $returnValue .= '<pre><div><div class="header">';
    } else {
        $returnValue .= '<pre>';
    }

    $returnValue .= $message_body;
    
    if (!$stripHTML) {
        $returnValue .= '</div></div></pre></font></body></html>';
    } else {
        $returnValue .= '</pre>';
    }
    return $returnValue;
}
