src/Protocol/Email.php

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