src/Protocol/Email.php

   1 <?php
   2 /**
   3  * @file src/Protocol/Email.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 require_once 'include/html2plain.php';
   8 require_once 'include/quoteconvert.php';
   9
  10 /**
  11  * @brief Email class
  12  */
  13 class Email
  14 {
  15         /**
  16          * @param string $mailbox  The mailbox name
  17          * @param string $username The username
  18          * @param string $password The password
  19          * @return object
  20          */
  21         public static function connect($mailbox, $username, $password)
  22         {
  23                 if (!function_exists('imap_open')) {
  24                         return false;
  25                 }
  26
  27                 $mbox = @imap_open($mailbox, $username, $password);
  28
  29                 return $mbox;
  30         }
  31
  32         /**
  33          * @param object $mbox       mailbox
  34          * @param string $email_addr email
  35          * @return array
  36          */
  37         public static function poll($mbox, $email_addr)
  38         {
  39                 if (!$mbox || !$email_addr) {
  40                         return array();
  41                 }
  42
  43                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  44                 if (!$search1) {
  45                         $search1 = array();
  46                 } else {
  47                         logger("Found mails from ".$email_addr, LOGGER_DEBUG);
  48                 }
  49
  50                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  51                 if (!$search2) {
  52                         $search2 = array();
  53                 } else {
  54                         logger("Found mails to ".$email_addr, LOGGER_DEBUG);
  55                 }
  56
  57                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  58                 if (!$search3) {
  59                         $search3 = array();
  60                 } else {
  61                         logger("Found mails cc ".$email_addr, LOGGER_DEBUG);
  62                 }
  63
  64                 $res = array_unique(array_merge($search1, $search2, $search3));
  65
  66                 return $res;
  67         }
  68
  69         /**
  70          * @param array $mailacct mail account
  71          * @return object
  72          */
  73         public static function constructMailboxName($mailacct)
  74         {
  75                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  76                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  77                 $ret .= '}' . $mailacct['mailbox'];
  78                 return $ret;
  79         }
  80
  81         /**
  82          * @param object  $mbox mailbox
  83          * @param integer $uid  user id
  84          * @return mixed
  85          */
  86         public static function messageMeta($mbox, $uid)
  87         {
  88                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : array(array())); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
  89                 return (count($ret)) ? $ret : array();
  90         }
  91
  92         /**
  93          * @param object  $mbox  mailbox
  94          * @param integer $uid   user id
  95          * @param string  $reply reply
  96          * @return array
  97          */
  98         public static function getMessage($mbox, $uid, $reply)
  99         {
 100                 $ret = array();
 101
 102                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 103
 104                 if (!$struc) {
 105                         return $ret;
 106                 }
 107
 108                 if (!$struc->parts) {
 109                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 110                         $html = $ret['body'];
 111
 112                         if (trim($ret['body']) == '') {
 113                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 114                         } else {
 115                                 $ret['body'] = html2bbcode($ret['body']);
 116                         }
 117                 } else {
 118                         $text = '';
 119                         $html = '';
 120                         foreach ($struc->parts as $ptop => $p) {
 121                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 122                                 if ($x) {
 123                                         $text .= $x;
 124                                 }
 125
 126                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 127                                 if ($x) {
 128                                         $html .= $x;
 129                                 }
 130                         }
 131                         if (trim($html) != '') {
 132                                 $ret['body'] = html2bbcode($html);
 133                         } else {
 134                                 $ret['body'] = $text;
 135                         }
 136                 }
 137
 138                 $ret['body'] = self::removeGPG($ret['body']);
 139                 $msg = self::removeSig($ret['body']);
 140                 $ret['body'] = $msg['body'];
 141                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 142
 143                 if (trim($html) != '') {
 144                         $ret['body'] = self::removeLinebreak($ret['body']);
 145                 }
 146
 147                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 148
 149                 return $ret;
 150         }
 151
 152         // At the moment - only return plain/text.
 153         // Later we'll repackage inline images as data url's and make the HTML safe
 154         /**
 155          * @param object  $mbox    mailbox
 156          * @param integer $uid     user id
 157          * @param object  $p       parts
 158          * @param integer $partno  part number
 159          * @param string  $subtype sub type
 160          * @return string
 161          */
 162         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 163         {
 164                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 165                 global $htmlmsg,$plainmsg,$charset,$attachments;
 166
 167                 //echo $partno."\n";
 168
 169                 // DECODE DATA
 170                 $data = ($partno)
 171                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 172                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 173
 174                 // Any part may be encoded, even plain text messages, so check everything.
 175                 if ($p->encoding == 4) {
 176                         $data = quoted_printable_decode($data);
 177                 } elseif ($p->encoding == 3) {
 178                         $data = base64_decode($data);
 179                 }
 180
 181                 // PARAMETERS
 182                 // get all parameters, like charset, filenames of attachments, etc.
 183                 $params = array();
 184                 if ($p->parameters) {
 185                         foreach ($p->parameters as $x) {
 186                                 $params[strtolower($x->attribute)] = $x->value;
 187                         }
 188                 }
 189
 190                 if (isset($p->dparameters) && $p->dparameters) {
 191                         foreach ($p->dparameters as $x) {
 192                                 $params[strtolower($x->attribute)] = $x->value;
 193                         }
 194                 }
 195
 196                 // ATTACHMENT
 197                 // Any part with a filename is an attachment,
 198                 // so an attached text file (type 0) is not mistaken as the message.
 199
 200                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 201                         // filename may be given as 'Filename' or 'Name' or both
 202                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 203                         // filename may be encoded, so see imap_mime_header_decode()
 204                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 205                 }
 206
 207                 // TEXT
 208                 if ($p->type == 0 && $data) {
 209                         // Messages may be split in different parts because of inline attachments,
 210                         // so append parts together with blank row.
 211                         if (strtolower($p->subtype)==$subtype) {
 212                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 213                                 return (trim($data) ."\n\n");
 214                         } else {
 215                                 $data = '';
 216                         }
 217
 218                         // $htmlmsg .= $data ."<br><br>";
 219                         $charset = $params['charset'];  // assume all parts are same charset
 220                 }
 221
 222                 // EMBEDDED MESSAGE
 223                 // Many bounce notifications embed the original message as type 2,
 224                 // but AOL uses type 1 (multipart), which is not handled here.
 225                 // There are no PHP functions to parse embedded messages,
 226                 // so this just appends the raw source to the main message.
 227                 //      elseif ($p->type==2 && $data) {
 228                 //              $plainmsg .= $data."\n\n";
 229                 //      }
 230
 231                 // SUBPART RECURSION
 232                 if (isset($p->parts) && $p->parts) {
 233                         $x = "";
 234                         foreach ($p->parts as $partno0 => $p2) {
 235                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 236                                 //if ($x) {
 237                                 //      return $x;
 238                                 //}
 239                         }
 240                         return $x;
 241                 }
 242         }
 243
 244         /**
 245          * @param string $in_str  in string
 246          * @param string $charset character set
 247          * @return string
 248          */
 249         public static function encodeHeader($in_str, $charset)
 250         {
 251                 $out_str = $in_str;
 252                 $need_to_convert = false;
 253
 254                 for ($x = 0; $x < strlen($in_str); $x ++) {
 255                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 256                                 $need_to_convert = true;
 257                         }
 258                 }
 259
 260                 if (!$need_to_convert) {
 261                         return $in_str;
 262                 }
 263
 264                 if ($out_str && $charset) {
 265                         // define start delimimter, end delimiter and spacer
 266                         $end = "?=";
 267                         $start = "=?" . $charset . "?B?";
 268                         $spacer = $end . "\r\n " . $start;
 269
 270                         // determine length of encoded text within chunks
 271                         // and ensure length is even
 272                         $length = 75 - strlen($start) - strlen($end);
 273
 274                         /*
 275                                 [EDIT BY danbrown AT php DOT net: The following
 276                                 is a bugfix provided by (gardan AT gmx DOT de)
 277                                 on 31-MAR-2005 with the following note:
 278                                 "This means: $length should not be even,
 279                                 but divisible by 4. The reason is that in
 280                                 base64-encoding 3 8-bit-chars are represented
 281                                 by 4 6-bit-chars. These 4 chars must not be
 282                                 split between two encoded words, according
 283                                 to RFC-2047.
 284                         */
 285                         $length = $length - ($length % 4);
 286
 287                         // encode the string and split it into chunks
 288                         // with spacers after each chunk
 289                         $out_str = base64_encode($out_str);
 290                         $out_str = chunk_split($out_str, $length, $spacer);
 291
 292                         // remove trailing spacer and
 293                         // add start and end delimiters
 294                         $spacer = preg_quote($spacer, '/');
 295                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 296                         $out_str = $start . $out_str . $end;
 297                 }
 298                 return $out_str;
 299         }
 300
 301         /**
 302          * Function send is used by NETWORK_EMAIL and NETWORK_EMAIL2 code
 303          * (not to notify the user, but to send items to email contacts)
 304          *
 305          * @param string $addr    address
 306          * @param string $subject subject
 307          * @param string $headers headers
 308          * @param array  $item    item
 309          *
 310          * @return void
 311          *
 312          * @todo This could be changed to use the Emailer class
 313          */
 314         public static function send($addr, $subject, $headers, $item)
 315         {
 316                 //$headers .= 'MIME-Version: 1.0' . "\n";
 317                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 318                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 319                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 320
 321                 $part = uniqid("", true);
 322
 323                 $html    = prepare_body($item);
 324
 325                 $headers .= "Mime-Version: 1.0\n";
 326                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 327
 328                 $body = "\n--=_".$part."\n";
 329                 $body .= "Content-Transfer-Encoding: 8bit\n";
 330                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 331
 332                 $body .= html2plain($html)."\n";
 333
 334                 $body .= "--=_".$part."\n";
 335                 $body .= "Content-Transfer-Encoding: 8bit\n";
 336                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 337
 338                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 339
 340                 $body .= "--=_".$part."--";
 341
 342                 //$message = '<html><body>' . $html . '</body></html>';
 343                 //$message = html2plain($html);
 344                 logger('notifier: email delivery to ' . $addr);
 345                 mail($addr, $subject, $body, $headers);
 346         }
 347
 348         /**
 349          * @param string $iri string
 350          * @return string
 351          */
 352         public static function iri2msgid($iri)
 353         {
 354                 if (!strpos($iri, "@")) {
 355                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 356                 } else {
 357                         $msgid = $iri;
 358                 }
 359
 360                 return $msgid;
 361         }
 362
 363         /**
 364          * @param string $msgid msgid
 365          * @return string
 366          */
 367         public static function msgid2iri($msgid)
 368         {
 369                 if (strpos($msgid, "@")) {
 370                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 371                 } else {
 372                         $iri = $msgid;
 373                 }
 374
 375                 return $iri;
 376         }
 377
 378         private static function saveReplace($pattern, $replace, $text)
 379         {
 380                 $save = $text;
 381
 382                 $text = preg_replace($pattern, $replace, $text);
 383
 384                 if ($text == '') {
 385                         $text = $save;
 386                 }
 387                 return $text;
 388         }
 389
 390         private static function unifyAttributionLine($message)
 391         {
 392                 $quotestr = array('quote', 'spoiler');
 393                 foreach ($quotestr as $quote) {
 394                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 395                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 396
 397                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 398                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 399                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 400
 401                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 402                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 403
 404                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 405
 406                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 407
 408                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 409                         $message = self::saveReplace('/Am (.*?) schrieb <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 410                         $message = self::saveReplace('/Am (.*?) schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 411                         $message = self::saveReplace('/Am (.*?) schrieb (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 412
 413                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 414
 415                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 416
 417                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 418                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 419                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 420                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 421                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 422
 423                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 424                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 425
 426                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 427
 428                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 429
 430                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 431                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 432
 433                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 434
 435                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 436                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 437
 438                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 439
 440                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 441                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 442                         $message = self::saveReplace('/(.*?) schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 443                         $message = self::saveReplace('/(.*?) \((.*?)\) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 444                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 445
 446                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 447                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 448                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 449
 450                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 451                         $message = self::saveReplace('/(.*?) wrote \(.*?\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 452                         $message = self::saveReplace('/(.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 453
 454                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 455
 456                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 457                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) (.*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 458                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 459                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 460
 461                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 462                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 463                 }
 464                 return $message;
 465         }
 466
 467         private static function removeGPG($message)
 468         {
 469                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 470                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 471                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 472
 473                 preg_match($pattern, $message, $result);
 474
 475                 $cleaned = trim($result[1].$result[2].$result[3]);
 476
 477                 $cleaned = str_replace(array("\n- --\n", "\n- -"), array("\n-- \n", "\n-"), $cleaned);
 478
 479                 if ($cleaned == '') {
 480                         $cleaned = $message;
 481                 }
 482
 483                 return $cleaned;
 484         }
 485
 486         private static function removeSig($message)
 487         {
 488                 $sigpos = strrpos($message, "\n-- \n");
 489                 $quotepos = strrpos($message, "[/quote]");
 490
 491                 if ($sigpos == 0) {
 492                         // Especially for web.de who are using that as a separator
 493                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 494                         $sigpos = strrpos($message, "\n-- \n");
 495                         $quotepos = strrpos($message, "[/quote]");
 496                 }
 497
 498                 // When the signature separator is inside a quote, we don't separate
 499                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 500                         return array('body' => $message, 'sig' => '');
 501                 }
 502
 503                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 504
 505                 preg_match($pattern, $message, $result);
 506
 507                 if (($result[1] != '') && ($result[2] != '')) {
 508                         $cleaned = trim($result[1])."\n";
 509                         $sig = trim($result[2]);
 510                 } else {
 511                         $cleaned = $message;
 512                         $sig = '';
 513                 }
 514
 515                 return array('body' => $cleaned, 'sig' => $sig);
 516         }
 517
 518         private static function removeLinebreak($message)
 519         {
 520                 $arrbody = explode("\n", trim($message));
 521
 522                 $lines = array();
 523                 $lineno = 0;
 524
 525                 foreach ($arrbody as $i => $line) {
 526                         $currquotelevel = 0;
 527                         $currline = $line;
 528                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 529                                 || (substr($currline, 0, 1) == ' '))) {
 530                                 if (substr($currline, 0, 1) == '>') {
 531                                         $currquotelevel++;
 532                                 }
 533
 534                                 $currline = ltrim(substr($currline, 1));
 535                         }
 536
 537                         $quotelevel = 0;
 538                         $nextline = trim($arrbody[$i+1]);
 539                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 540                                 || (substr($nextline, 0, 1) == ' '))) {
 541                                 if (substr($nextline, 0, 1) == '>') {
 542                                         $quotelevel++;
 543                                 }
 544
 545                                 $nextline = ltrim(substr($nextline, 1));
 546                         }
 547
 548                         $firstword = strpos($nextline.' ', ' ');
 549
 550                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 551                                         (substr(trim($nextline), 0, 1) == '=') ||
 552                                         (substr(trim($nextline), 0, 1) == '*') ||
 553                                         (substr(trim($nextline), 0, 1) == '·') ||
 554                                         (substr(trim($nextline), 0, 4) == '[url') ||
 555                                         (substr(trim($nextline), 0, 5) == '[size') ||
 556                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 557                                         (substr(trim($nextline), 0, 8) == 'https://'));
 558
 559                         if (!$specialchars) {
 560                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 561                                                 (substr(rtrim($line), -1) == '=') ||
 562                                                 (substr(rtrim($line), -1) == '*') ||
 563                                                 (substr(rtrim($line), -1) == '·') ||
 564                                                 (substr(rtrim($line), -6) == '[/url]') ||
 565                                                 (substr(rtrim($line), -7) == '[/size]'));
 566                         }
 567
 568                         if ($lines[$lineno] != '') {
 569                                 if (substr($lines[$lineno], -1) != ' ') {
 570                                         $lines[$lineno] .= ' ';
 571                                 }
 572
 573                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 574                                         || (substr($line, 0, 1) == ' '))) {
 575
 576                                         $line = ltrim(substr($line, 1));
 577                                 }
 578                         }
 579
 580                         $lines[$lineno] .= $line;
 581                         if (((substr($line, -1, 1) != ' '))
 582                                 || ($quotelevel != $currquotelevel)) {
 583                                 $lineno++;
 584                                 }
 585                 }
 586                 return implode("\n", $lines);
 587         }
 588
 589         private static function convertQuote($body, $reply)
 590         {
 591                 // Convert Quotes
 592                 $arrbody = explode("\n", trim($body));
 593                 $arrlevel = array();
 594
 595                 for ($i = 0; $i < count($arrbody); $i++) {
 596                         $quotelevel = 0;
 597                         $quoteline = $arrbody[$i];
 598
 599                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 600                                 || (substr($quoteline, 0, 1) == ' '))) {
 601                                 if (substr($quoteline, 0, 1) == '>')
 602                                         $quotelevel++;
 603
 604                                 $quoteline = ltrim(substr($quoteline, 1));
 605                         }
 606
 607                         $arrlevel[$i] = $quotelevel;
 608                         $arrbody[$i] = $quoteline;
 609                 }
 610
 611                 $quotelevel = 0;
 612                 $previousquote = 0;
 613                 $arrbodyquoted = array();
 614
 615                 for ($i = 0; $i < count($arrbody); $i++) {
 616                         $previousquote = $quotelevel;
 617                         $quotelevel = $arrlevel[$i];
 618                         $currline = $arrbody[$i];
 619
 620                         while ($previousquote < $quotelevel) {
 621                                 if ($sender != '') {
 622                                         $quote = "[quote title=$sender]";
 623                                         $sender = '';
 624                                 } else
 625                                         $quote = "[quote]";
 626
 627                                 $arrbody[$i] = $quote.$arrbody[$i];
 628                                 $previousquote++;
 629                         }
 630
 631                         while ($previousquote > $quotelevel) {
 632                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 633                                 $previousquote--;
 634                         }
 635
 636                         $arrbodyquoted[] = $arrbody[$i];
 637                 }
 638                 while ($quotelevel > 0) {
 639                         $arrbodyquoted[] = '[/quote]';
 640                         $quotelevel--;
 641                 }
 642
 643                 $body = implode("\n", $arrbodyquoted);
 644
 645                 if (strlen($body) > 0) {
 646                         $body = $body."\n\n";
 647                 }
 648
 649                 if ($reply) {
 650                         $body = self::removeToFu($body);
 651                 }
 652
 653                 return $body;
 654         }
 655
 656         private static function removeToFu($message)
 657         {
 658                 $message = trim($message);
 659
 660                 do {
 661                         $oldmessage = $message;
 662                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 663                         $message = str_replace("[/quote][quote]", "", $message);
 664                 } while ($message != $oldmessage);
 665
 666                 $quotes = array();
 667
 668                 $startquotes = 0;
 669
 670                 $start = 0;
 671
 672                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 673                         $quotes[$pos] = -1;
 674                         $start = $pos + 7;
 675                         $startquotes++;
 676                 }
 677
 678                 $endquotes = 0;
 679                 $start = 0;
 680
 681                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 682                         $start = $pos + 7;
 683                         $endquotes++;
 684                 }
 685
 686                 while ($endquotes < $startquotes) {
 687                         $message .= '[/quote]';
 688                         ++$endquotes;
 689                 }
 690
 691                 $start = 0;
 692
 693                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 694                         $quotes[$pos] = 1;
 695                         $start = $pos + 7;
 696                 }
 697
 698                 if (strtolower(substr($message, -8)) != '[/quote]')
 699                         return($message);
 700
 701                 krsort($quotes);
 702
 703                 $quotelevel = 0;
 704                 $quotestart = 0;
 705                 foreach ($quotes as $index => $quote) {
 706                         $quotelevel += $quote;
 707
 708                         if (($quotelevel == 0) and ($quotestart == 0))
 709                                 $quotestart = $index;
 710                 }
 711
 712                 if ($quotestart != 0) {
 713                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 714                 }
 715
 716                 return $message;
 717         }
 718 }