banana/post.inc.php

   1 <?php
   2 /********************************************************************************
   3 * include/posts.inc.php : class for posts
   4 * -----------------------
   5 *
   6 * This file is part of the banana distribution
   7 * Copyright: See COPYING files that comes with this distribution
   8 ********************************************************************************/
   9
  10 /** class for posts
  11  */
  12
  13 class BananaPost
  14 {
  15     var $id;
  16     /** headers */
  17     var $headers;
  18     /** body */
  19     var $body;
  20     /** formating */
  21     var $messages;
  22     /** attachment */
  23     var $pj;
  24     /** poster name */
  25     var $name;
  26     /** test validity */
  27     var $valid = true;
  28
  29     /** constructor
  30      * @param $_id STRING MSGNUM or MSGID (a group should be selected in this case)
  31      */
  32     function BananaPost($_id)
  33     {
  34         global $banana;
  35         $this->id       = $_id;
  36         $this->pj       = array();
  37         $this->messages = array();
  38         if (!$this->_header()) {
  39             $this->valid = false;
  40             return null;
  41         }
  42
  43
  44         if ($body = $banana->nntp->body($_id)) {
  45             $this->body = join("\n", $body);
  46         } else {
  47             $this->valid = false;
  48             return null;
  49         }
  50
  51         if (isset($this->headers['content-transfer-encoding'])) {
  52             if (preg_match("/base64/", $this->headers['content-transfer-encoding'])) {
  53                 $this->body = base64_decode($this->body);
  54             } elseif (preg_match("/quoted-printable/", $this->headers['content-transfer-encoding'])) {
  55                 $this->body = quoted_printable_decode($this->body);
  56             }
  57         }
  58
  59         if ($this->_split_multipart($this->headers, $this->body)) {
  60             $this->set_body_to_part(0);
  61         } else {
  62             if(isset($mpart_type)) {
  63                 $this->_split_multipart($mpart_type[1], $mpart_boundary[1]);
  64             }
  65             $this->_find_uuencode();
  66             $this->_fix_charset();
  67         }
  68     }
  69
  70     /** find and add uuencoded attachments
  71      */
  72     function _find_uuencode()
  73     {
  74         if (preg_match_all('@\n(begin \d+ ([^\r\n]+)\r?(?:\n(?!end)[^\n]*)*\nend)@', $this->body, $matches, PREG_SET_ORDER)) {
  75             foreach ($matches as $match) {
  76                 $mime = trim(exec('echo '.escapeshellarg($match[1]).' | uudecode -o /dev/stdout | file -bi -'));
  77                 if ($mime != 'application/x-empty') {
  78                     $this->body = trim(str_replace($match[0], '', $this->body));
  79                     $body = $match[1];
  80                     $header['content-type'] = $mime.'; name="'.$match[2].'"';
  81                     $header['content-transfer-encoding'] = 'x-uuencode';
  82                     $header['content-disposition'] = 'attachment; filename="'.$match[2].'"';
  83                     $this->_add_attachment(Array('headers' => $header, 'body' => $body));
  84                 }
  85             }
  86         }
  87     }
  88
  89     /** split multipart messages
  90      * @param $type STRING multipart type description
  91      * @param $boundary STRING multipart boundary identification string
  92      */
  93     function _split_multipart($headers, $body)
  94     {
  95         if (!isset($headers['content-type'])
  96                 || !preg_match("@multipart/([^;]+);@", $headers['content-type'], $type)) {
  97             return false;
  98         }
  99
 100         preg_match("/boundary=\"?([^ \"]+)\"?/", $headers['content-type'], $boundary);
 101         $boundary = $boundary[1];
 102         $type     = $type[1];
 103         $parts    = preg_split("@\n--$boundary(--|\n)@", $body);
 104         foreach ($parts as $part) {
 105             $part         = $this->_get_part($part);
 106             $local_header = $part['headers'];
 107             $local_body   = $part['body'];
 108             if (!$this->_split_multipart($local_header, $local_body)) {
 109                 $is_text = isset($local_header['content-type'])
 110                          && preg_match("@text/([^;]+);@", $local_header['content-type'])
 111                          && (!isset($local_header['content-disposition'])
 112                              || !preg_match('@attachment@', $local_header['content-disposition']));
 113
 114                 // alternative ==> multiple formats for messages
 115                 if ($type == 'alternative' && $is_text) {
 116                     array_push($this->messages, $part);
 117
 118                 // !alternative ==> une body, others are attachments
 119                 } else if ($is_text) {
 120                     if (count($this->messages) == 0) {
 121                         $this->body = $local_body;
 122                         foreach (array_keys($local_header) as $key) {
 123                             $this->header[$key] = $local_header[$key];
 124                         }
 125                         array_push($this->messages, $part);
 126                     } else {
 127                         $this->_add_attachment($part);
 128                     }
 129                 } else {
 130                     $this->_add_attachment($part);
 131                 }
 132             }
 133         }
 134         return true;
 135     }
 136
 137     /** extract new headers from the part
 138      * @param $part STRING part of a multipart message
 139      */
 140     function _get_part($part)
 141     {
 142         global $banana;
 143
 144         $local_headers = Array();
 145         $lines = split("\n", $part);
 146         while (count($lines)) {
 147             $line = array_shift($lines);
 148             if ($line != "") {
 149                 if (preg_match('@^[\t\r ]+@', $line) && isset($hdr)) {
 150                     $local_headers[$hdr] .= ' '.trim($line);
 151                 } else {
 152                     list($hdr, $val) = split(":[ \t\r]*", $line, 2);
 153                     $hdr = strtolower($hdr);
 154                     if (in_array($hdr, $banana->parse_hdr)) {
 155                         $local_headers[$hdr] = $val;
 156                     }
 157                 }
 158             } else {
 159                 break;
 160             }
 161         }
 162         $local_body = join("\n", $lines);
 163         if (isset($local_headers['content-transfer-encoding'])
 164                 && preg_match("/quoted-printable/", $local_headers['content-transfer-encoding'])) {
 165             $local_body = quoted_printable_decode($local_body);
 166         }
 167         return Array('headers' => $local_headers, 'body' => $local_body);
 168     }
 169
 170     /** add an attachment
 171      */
 172     function _add_attachment($part)
 173     {
 174         $local_header = $part['headers'];
 175         $local_body = $part['body'];
 176
 177         if ((isset($local_header['content-disposition']) && preg_match('/filename="?([^"]+)"?/', $local_header['content-disposition'], $filename))
 178             || (isset($local_header['content-type']) && preg_match('/name="?([^"]+)"?/', $local_header['content-type'], $filename))) {
 179             $filename = $filename[1];
 180         }
 181         if (!isset($filename)) {
 182             $filename = "attachment" . count($this->pj);
 183         }
 184
 185         if (isset($local_header['content-type'])
 186                 && preg_match('/^\s*([^ ;]+);/', $local_header['content-type'], $mimetype)) {
 187             $mimetype = $mimetype[1];
 188         } else {
 189             return false;
 190         }
 191
 192         if (isset($local_header['content-id'])
 193                 && preg_match('/^\s*<([^> ]+)>/', $local_header['content-id'], $cid)) {
 194             $cid = $cid[1];
 195         } else {
 196             $cid = null;
 197         }
 198
 199         array_push($this->pj, Array('MIME' => $mimetype,
 200                                     'filename' => $filename,
 201                                     'encoding' => strtolower($local_header['content-transfer-encoding']),
 202                                     'data' => $local_body,
 203                                     'cid' => $cid));
 204         return true;
 205     }
 206
 207     /** Fix body charset (convert body to utf8)
 208      * @return false if failed
 209      */
 210     function _fix_charset()
 211     {
 212         if (preg_match('!charset="?([^;"]*)"?\s*(;|$)?!', $this->headers['content-type'], $matches)) {
 213             $body = iconv($matches[1], 'utf-8', $this->body);
 214             if (strlen($body) == 0) {
 215                 return false;
 216             }
 217             $this->body = $body;
 218         } else {
 219             $this->body = utf8_encode($this->body);
 220         }
 221         return true;
 222     }
 223
 224     /** return body in plain text (useful for messages without a text/plain part)
 225      */
 226     function get_body()
 227     {
 228         preg_match("@text/([^;]+);@", $this->headers['content-type'], $format);
 229         if ($format[1] == 'plain') {
 230             return $this->body;
 231         }
 232         if ($format[1] == 'richtext') {
 233             return htmlToPlainText(richtextToHtml($this->body));
 234         } else {
 235             return htmlToPlainText($this->body);
 236         }
 237     }
 238
 239     /** return local url for the given cid
 240      * @param cid STRING
 241      */
 242     function find_attachment($cid)
 243     {
 244         global $banana;
 245         $i = 0;
 246         foreach ($this->pj as $pj) {
 247             if ($pj['cid'] == $cid) {
 248                 return htmlentities(makeLink(Array('group'  => $banana->state['group'],
 249                                                    'artid'  => $this->id,
 250                                                    'pj'     => $i,
 251                                                    'action' => 'view')));
 252             }
 253             $i++;
 254         }
 255         return 'cid:' . $cid;;
 256     }
 257
 258     /** decode an attachment
 259      * @param pjid INT id of the attachment to decode
 260      * @param action BOOL action to execute : true=view, false=download
 261      */
 262     function get_attachment($pjid, $action = false)
 263     {
 264         if ($pjid >= count($this->pj)) {
 265             return false;
 266         } else {
 267             $file = $this->pj[$pjid];
 268             header('Content-Type: '.$file['MIME'].'; name="'.$file['filename'].'"');
 269             if (!$action) {
 270                 header('Content-Disposition: attachment; filename="'.$file['filename'].'"');
 271             } else {
 272                 header('Content-Disposition: inline; filename="'.$file['filename'].'"');
 273             }
 274             if ($file['encoding'] == 'base64') {
 275                 echo base64_decode($file['data']);
 276             } else if ($file['encoding'] == 'x-uuencode') {
 277                 passthru('echo '.escapeshellarg($file['data']).' | uudecode -o /dev/stdout');
 278             } else {
 279                 header('Content-Transfer-Encoding: '.$file['encoding']);
 280                 echo $file['data'];
 281             }
 282             return true;
 283         }
 284     }
 285
 286     /** set body to represent the given part
 287      * @param partid INT index of the part in messages
 288      */
 289     function set_body_to_part($partid)
 290     {
 291         global $banana;
 292
 293         if (count($this->messages) == 0) {
 294             return false;
 295         }
 296
 297         $local_header = $this->messages[$partid]['headers'];
 298         $this->body   = $this->messages[$partid]['body'];
 299         foreach ($banana->parse_hdr as $hdr) {
 300             if (isset($local_header[$hdr])) {
 301                 $this->headers[$hdr] = $local_header[$hdr];
 302             }
 303         }
 304
 305         $this->_fix_charset();
 306         return true;
 307     }
 308
 309     function _header()
 310     {
 311         global $banana;
 312         $hdrs = $banana->nntp->head($this->id);
 313         if (!$hdrs) {
 314             return false;
 315         }
 316
 317         // parse headers
 318         foreach ($hdrs as $line) {
 319             if (preg_match("/^[\t\r ]+/", $line)) {
 320                 $line = ($hdr=="X-Face"?"":" ").ltrim($line);
 321                 if (in_array($hdr, $banana->parse_hdr))  {
 322                     $this->headers[$hdr] .= $line;
 323                 }
 324             } else {
 325                 list($hdr, $val) = split(":[ \t\r]*", $line, 2);
 326                 $hdr = strtolower($hdr);
 327                 if (in_array($hdr, $banana->parse_hdr)) {
 328                     $this->headers[$hdr] = $val;
 329                 }
 330             }
 331         }
 332         // decode headers
 333         foreach ($banana->hdecode as $hdr) {
 334             if (isset($this->headers[$hdr])) {
 335                 $this->headers[$hdr] = headerDecode($this->headers[$hdr]);
 336             }
 337         }
 338
 339         $this->name = $this->headers['from'];
 340         $this->name = preg_replace('/<[^ ]*>/', '', $this->name);
 341         $this->name = trim($this->name);
 342         return true;
 343     }
 344
 345     function checkcancel()
 346     {
 347         if (function_exists('hook_checkcancel')) {
 348             return hook_checkcancel($this->headers);
 349         }
 350         if (!isset($_SESSION)) {
 351             return false;
 352         }
 353         return ($this->headers['from'] == $_SESSION['name'] . ' <' . $_SESSION['mail']. '>');
 354     }
 355
 356     /** Make some links to browse the current newsgroup
 357      */
 358     function _browser()
 359     {
 360         global $banana;
 361         $ret = '<div class="banana_menu">';
 362         $actions = Array('prevThread' => Array('prev_thread', _b_('Discussion précédente')),
 363                          'prevPost'   => Array('prev',        _b_('Article précédent')),
 364                          'nextPost'   => Array('next',        _b_('Article suivant')),
 365                          'nextThread' => Array('next_thread', _b_('Discussion suivante')));
 366         foreach ($actions as $method=>$params) {
 367             $id = $banana->spool->$method($this->id);
 368             if (!is_null($id)) {
 369                 $ret .= makeImgLink(Array('group' => $banana->state['group'],
 370                                           'artid' => $id),
 371                                     $params[0] . '.gif',
 372                                     $params[1]);
 373             }
 374         }
 375         return $ret . '</div>';
 376     }
 377
 378     /** convert message to html
 379      * @param partid INT id of the multipart message that must be displaid
 380      */
 381     function to_html($partid = -1)
 382     {
 383         global $banana;
 384
 385         if (count($this->messages) > 1) {
 386             if ($partid != -1) {
 387                 $this->set_body_to_part($partid);
 388             } else {
 389                 // Select prefered text-format
 390                 foreach ($banana->body_mime as $mime) {
 391                     for ($id = 0 ; $id < count($this->messages) ; $id++) {
 392                         if (preg_match("@$mime@", $this->messages[$id]['headers']['content-type'])) {
 393                             $partid = $id;
 394                             $this->set_body_to_part($partid);
 395                             break;
 396                         }
 397                     }
 398                     if ($partid != -1) {
 399                         break;
 400                     }
 401                 }
 402                 if ($partid == -1) {
 403                     $partid = 0;
 404                 }
 405             }
 406         } else {
 407             $partid = 0;
 408         }
 409
 410         $res  = '<table class="bicol banana_msg" cellpadding="0" cellspacing="0">';
 411         $res .= '<tr><th colspan="2" class="subject">'
 412              . $this->_browser()
 413              . '<div class="banana_action">'
 414              . makeImgLink(Array('group'  => $banana->state['group'],
 415                                  'action' => 'new'),
 416                            'post.gif',
 417                            _b_('Nouveau message'))
 418              . makeImgLink(Array('group'  => $banana->state['group'],
 419                                  'artid'  => $this->id,
 420                                  'action' => 'new'),
 421                            'reply.gif',
 422                            _b_('Répondre'));
 423         if ($this->checkCancel()) {
 424             $res .= makeImgLink(Array('group'  => $banana->state['group'],
 425                                       'artid'  => $this->id,
 426                                       'action' => 'cancel'),
 427                                 'cancel.gif',
 428                                 _b_('Annuler'));
 429         }
 430         $res .= '</div>'
 431              . formatDisplayHeader('subject', $this->headers['subject'])
 432              . '</th></tr>'
 433              . '<tr class="pair"><td class="headers"><table cellpadding="0" cellspacing="0">';
 434
 435         $xface = null;
 436         foreach ($banana->show_hdr as $hdr) {
 437             if (isset($this->headers[$hdr])) {
 438                 $res2 = formatdisplayheader($hdr, $this->headers[$hdr]);
 439                 if ($res2 && ($hdr != 'x-face' || !$banana->formatxface)) {
 440                     $res .= '<tr><td class="hdr">'.header_translate($hdr)."</td><td class='val'>$res2</td></tr>\n";
 441                 } else if ($res2) {
 442                     $xface = $res2;
 443                 }
 444             }
 445         }
 446         $res .= '</table></td><td class="xface">';
 447
 448         if ($xface) {
 449             $res .= $xface;
 450         }
 451         $res .= '</td></tr>';
 452
 453         if (count($this->messages) > 1) {
 454             $res .= '<tr><th colspan="2">';
 455             for ($i = 0 ; $i < count($this->messages) ; $i++) {
 456                 if ($i != 0) {
 457                     $res .= ' . ';
 458                 }
 459                 preg_match("@text/([^;]+);@", $this->messages[$i]['headers']['content-type'], $format);
 460                 $format = textFormat_translate($format[1]);
 461                 if ($i != $partid) {
 462                     $res .= makeHREF(Array('group' => $banana->state['group'],
 463                                            'artid' => $this->id,
 464                                            'part'  => $i),
 465                                      $format);
 466                 } else {
 467                     $res .= $format;
 468                 }
 469             }
 470             $res .= '</th></tr>';
 471         }
 472
 473         preg_match("@text/([^;]+);@", $this->headers['content-type'], $format);
 474         $format = $format[1];
 475         $res .= '<tr class="impair"><td colspan="2" class="body"';
 476         if ($format == 'html') {
 477             if (preg_match('@<body[^>]*bgcolor="?([#0-9a-f]+)"?[^>]*>@i', $this->body, $bgcolor)) {
 478                 $res .= ' bgcolor="'.$bgcolor[1].'"';
 479             }
 480             $this->body = preg_replace('/cid:([^\'" ]+)/e', "find_attachment('\\1')", $this->body);
 481             $res .= '>'.formatbody($this->body, $format);
 482         } else {
 483             $res .= '><pre>'.formatbody($this->body).'</pre>';
 484         }
 485         $res .= '</td></tr>';
 486
 487         if (count($this->pj) > 0) {
 488             $res .= '<tr><th colspan="2">'._b_('Pièces jointes').'</th></tr>';
 489             $res .= '<tr><td colspan="2">';
 490             $i = 0;
 491             foreach ($this->pj as $file) {
 492                 $res .= makeImgLink(Array('group' => $banana->state['group'],
 493                                           'artid' => $this->id,
 494                                           'pj'    => $i),
 495                                     'save.gif',
 496                                     _b_('Télécharger')) . ' ';
 497                 $res .= makeImgLink(Array('group' => $banana->state['group'],
 498                                           'artid' => $this->id,
 499                                           'pj'    => $i,
 500                                           'action'=> 'view'),
 501                                     'preview.gif',
 502                                     _b_('Aperçu'));
 503                 $res .= ' ' . $file['filename'].' ('.$file['MIME'].')';
 504                 $res .=  '<br/>';
 505                 $i++;
 506             }
 507             $res .= '</td></tr>';
 508         }
 509
 510         $ndx  = $banana->spool->getndx($this->id);
 511         $res .= '<tr><td class="thrd" colspan="2">'
 512              . $banana->spool->to_html($ndx-$banana->tbefore, $ndx+$banana->tafter, $ndx)
 513              . '</td></tr>';
 514         return $res.'</table>';
 515     }
 516 }
 517
 518 /** Wrapper for Post::find_attachment
 519  */
 520 function find_attachment($cid)
 521 {
 522     global $banana;
 523     return $banana->post->find_attachment($cid);
 524 }
 525
 526 // vim:set et sw=4 sts=4 ts=4
 527 ?>