src/Protocol/Email.php

   1 <?php
   2 /**
   3  * @file src/Protocol/Email.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use Friendica\Core\Logger;
   8 use Friendica\Content\Text\HTML;
   9 use Friendica\Model\Item;
  10
  11 /**
  12  * @brief Email class
  13  */
  14 class Email
  15 {
  16         /**
  17          * @param string $mailbox  The mailbox name
  18          * @param string $username The username
  19          * @param string $password The password
  20          * @return object
  21          * @throws \Exception
  22          */
  23         public static function connect($mailbox, $username, $password)
  24         {
  25                 if (!function_exists('imap_open')) {
  26                         return false;
  27                 }
  28
  29                 $mbox = @imap_open($mailbox, $username, $password);
  30
  31                 $errors = imap_errors();
  32                 if (!empty($errors)) {
  33                         Logger::log('IMAP Errors occured: ' . json_encode($errors));
  34                 }
  35
  36                 $alerts = imap_alerts();
  37                 if (!empty($alerts)) {
  38                         Logger::log('IMAP Alerts occured: ' . json_encode($alerts));
  39                 }
  40
  41                 return $mbox;
  42         }
  43
  44         /**
  45          * @param object $mbox       mailbox
  46          * @param string $email_addr email
  47          * @return array
  48          * @throws \Exception
  49          */
  50         public static function poll($mbox, $email_addr)
  51         {
  52                 if (!$mbox || !$email_addr) {
  53                         return [];
  54                 }
  55
  56                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  57                 if (!$search1) {
  58                         $search1 = [];
  59                 } else {
  60                         Logger::log("Found mails from ".$email_addr, Logger::DEBUG);
  61                 }
  62
  63                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  64                 if (!$search2) {
  65                         $search2 = [];
  66                 } else {
  67                         Logger::log("Found mails to ".$email_addr, Logger::DEBUG);
  68                 }
  69
  70                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  71                 if (!$search3) {
  72                         $search3 = [];
  73                 } else {
  74                         Logger::log("Found mails cc ".$email_addr, Logger::DEBUG);
  75                 }
  76
  77                 $res = array_unique(array_merge($search1, $search2, $search3));
  78
  79                 return $res;
  80         }
  81
  82         /**
  83          * @param array   $mailacct mail account
  84          * @return string
  85          */
  86         public static function constructMailboxName($mailacct)
  87         {
  88                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  89                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  90                 $ret .= '}' . $mailacct['mailbox'];
  91                 return $ret;
  92         }
  93
  94         /**
  95          * @param object  $mbox mailbox
  96          * @param integer $uid  user id
  97          * @return mixed
  98          */
  99         public static function messageMeta($mbox, $uid)
 100         {
 101                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : [[]]); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
 102                 return (count($ret)) ? $ret : [];
 103         }
 104
 105         /**
 106          * @param object  $mbox  mailbox
 107          * @param integer $uid   user id
 108          * @param string  $reply reply
 109          * @return array
 110          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 111          */
 112         public static function getMessage($mbox, $uid, $reply)
 113         {
 114                 $ret = [];
 115
 116                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 117
 118                 if (!$struc) {
 119                         return $ret;
 120                 }
 121
 122                 if (empty($struc->parts)) {
 123                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 124                         $html = $ret['body'];
 125
 126                         if (trim($ret['body']) == '') {
 127                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 128                         } else {
 129                                 $ret['body'] = HTML::toBBCode($ret['body']);
 130                         }
 131                 } else {
 132                         $text = '';
 133                         $html = '';
 134                         foreach ($struc->parts as $ptop => $p) {
 135                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 136                                 if ($x) {
 137                                         $text .= $x;
 138                                 }
 139
 140                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 141                                 if ($x) {
 142                                         $html .= $x;
 143                                 }
 144                         }
 145                         if (trim($html) != '') {
 146                                 $ret['body'] = HTML::toBBCode($html);
 147                         } else {
 148                                 $ret['body'] = $text;
 149                         }
 150                 }
 151
 152                 $ret['body'] = self::removeGPG($ret['body']);
 153                 $msg = self::removeSig($ret['body']);
 154                 $ret['body'] = $msg['body'];
 155                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 156
 157                 if (trim($html) != '') {
 158                         $ret['body'] = self::removeLinebreak($ret['body']);
 159                 }
 160
 161                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 162
 163                 return $ret;
 164         }
 165
 166         // At the moment - only return plain/text.
 167         // Later we'll repackage inline images as data url's and make the HTML safe
 168         /**
 169          * @param object  $mbox    mailbox
 170          * @param integer $uid     user id
 171          * @param object  $p       parts
 172          * @param integer $partno  part number
 173          * @param string  $subtype sub type
 174          * @return string
 175          */
 176         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 177         {
 178                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 179                 global $htmlmsg,$plainmsg,$charset,$attachments;
 180
 181                 //echo $partno."\n";
 182
 183                 // DECODE DATA
 184                 $data = ($partno)
 185                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 186                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 187
 188                 // Any part may be encoded, even plain text messages, so check everything.
 189                 if ($p->encoding == 4) {
 190                         $data = quoted_printable_decode($data);
 191                 } elseif ($p->encoding == 3) {
 192                         $data = base64_decode($data);
 193                 }
 194
 195                 // PARAMETERS
 196                 // get all parameters, like charset, filenames of attachments, etc.
 197                 $params = [];
 198                 if ($p->parameters) {
 199                         foreach ($p->parameters as $x) {
 200                                 $params[strtolower($x->attribute)] = $x->value;
 201                         }
 202                 }
 203
 204                 if (isset($p->dparameters) && $p->dparameters) {
 205                         foreach ($p->dparameters as $x) {
 206                                 $params[strtolower($x->attribute)] = $x->value;
 207                         }
 208                 }
 209
 210                 // ATTACHMENT
 211                 // Any part with a filename is an attachment,
 212                 // so an attached text file (type 0) is not mistaken as the message.
 213
 214                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 215                         // filename may be given as 'Filename' or 'Name' or both
 216                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 217                         // filename may be encoded, so see imap_mime_header_decode()
 218                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 219                 }
 220
 221                 // TEXT
 222                 if ($p->type == 0 && $data) {
 223                         // Messages may be split in different parts because of inline attachments,
 224                         // so append parts together with blank row.
 225                         if (strtolower($p->subtype)==$subtype) {
 226                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 227                                 return (trim($data) ."\n\n");
 228                         } else {
 229                                 $data = '';
 230                         }
 231
 232                         // $htmlmsg .= $data ."<br><br>";
 233                         $charset = $params['charset'];  // assume all parts are same charset
 234                 }
 235
 236                 // EMBEDDED MESSAGE
 237                 // Many bounce notifications embed the original message as type 2,
 238                 // but AOL uses type 1 (multipart), which is not handled here.
 239                 // There are no PHP functions to parse embedded messages,
 240                 // so this just appends the raw source to the main message.
 241                 //      elseif ($p->type==2 && $data) {
 242                 //              $plainmsg .= $data."\n\n";
 243                 //      }
 244
 245                 // SUBPART RECURSION
 246                 if (isset($p->parts) && $p->parts) {
 247                         $x = "";
 248                         foreach ($p->parts as $partno0 => $p2) {
 249                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 250                                 //if ($x) {
 251                                 //      return $x;
 252                                 //}
 253                         }
 254                         return $x;
 255                 }
 256         }
 257
 258         /**
 259          * @param string $in_str  in string
 260          * @param string $charset character set
 261          * @return string
 262          */
 263         public static function encodeHeader($in_str, $charset)
 264         {
 265                 $out_str = $in_str;
 266                 $need_to_convert = false;
 267
 268                 for ($x = 0; $x < strlen($in_str); $x ++) {
 269                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 270                                 $need_to_convert = true;
 271                         }
 272                 }
 273
 274                 if (!$need_to_convert) {
 275                         return $in_str;
 276                 }
 277
 278                 if ($out_str && $charset) {
 279                         // define start delimimter, end delimiter and spacer
 280                         $end = "?=";
 281                         $start = "=?" . $charset . "?B?";
 282                         $spacer = $end . "\r\n " . $start;
 283
 284                         // determine length of encoded text within chunks
 285                         // and ensure length is even
 286                         $length = 75 - strlen($start) - strlen($end);
 287
 288                         /*
 289                                 [EDIT BY danbrown AT php DOT net: The following
 290                                 is a bugfix provided by (gardan AT gmx DOT de)
 291                                 on 31-MAR-2005 with the following note:
 292                                 "This means: $length should not be even,
 293                                 but divisible by 4. The reason is that in
 294                                 base64-encoding 3 8-bit-chars are represented
 295                                 by 4 6-bit-chars. These 4 chars must not be
 296                                 split between two encoded words, according
 297                                 to RFC-2047.
 298                         */
 299                         $length = $length - ($length % 4);
 300
 301                         // encode the string and split it into chunks
 302                         // with spacers after each chunk
 303                         $out_str = base64_encode($out_str);
 304                         $out_str = chunk_split($out_str, $length, $spacer);
 305
 306                         // remove trailing spacer and
 307                         // add start and end delimiters
 308                         $spacer = preg_quote($spacer, '/');
 309                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 310                         $out_str = $start . $out_str . $end;
 311                 }
 312                 return $out_str;
 313         }
 314
 315         /**
 316          * Function send is used by Protocol::EMAIL and Protocol::EMAIL2 code
 317          * (not to notify the user, but to send items to email contacts)
 318          *
 319          * @param string $addr    address
 320          * @param string $subject subject
 321          * @param string $headers headers
 322          * @param array  $item    item
 323          *
 324          * @return void
 325          *
 326          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 327          * @throws \ImagickException
 328          * @todo This could be changed to use the Emailer class
 329          */
 330         public static function send($addr, $subject, $headers, $item)
 331         {
 332                 //$headers .= 'MIME-Version: 1.0' . "\n";
 333                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 334                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 335                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 336
 337                 $part = uniqid("", true);
 338
 339                 $html    = Item::prepareBody($item);
 340
 341                 $headers .= "Mime-Version: 1.0\n";
 342                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 343
 344                 $body = "\n--=_".$part."\n";
 345                 $body .= "Content-Transfer-Encoding: 8bit\n";
 346                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 347
 348                 $body .= HTML::toPlaintext($html)."\n";
 349
 350                 $body .= "--=_".$part."\n";
 351                 $body .= "Content-Transfer-Encoding: 8bit\n";
 352                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 353
 354                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 355
 356                 $body .= "--=_".$part."--";
 357
 358                 //$message = '<html><body>' . $html . '</body></html>';
 359                 //$message = html2plain($html);
 360                 Logger::log('notifier: email delivery to ' . $addr);
 361                 mail($addr, $subject, $body, $headers);
 362         }
 363
 364         /**
 365          * @param string $iri string
 366          * @return string
 367          */
 368         public static function iri2msgid($iri)
 369         {
 370                 if (!strpos($iri, "@")) {
 371                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 372                 } else {
 373                         $msgid = $iri;
 374                 }
 375
 376                 return $msgid;
 377         }
 378
 379         /**
 380          * @param string $msgid msgid
 381          * @return string
 382          */
 383         public static function msgid2iri($msgid)
 384         {
 385                 if (strpos($msgid, "@")) {
 386                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 387                 } else {
 388                         $iri = $msgid;
 389                 }
 390
 391                 return $iri;
 392         }
 393
 394         private static function saveReplace($pattern, $replace, $text)
 395         {
 396                 $save = $text;
 397
 398                 $text = preg_replace($pattern, $replace, $text);
 399
 400                 if ($text == '') {
 401                         $text = $save;
 402                 }
 403                 return $text;
 404         }
 405
 406         private static function unifyAttributionLine($message)
 407         {
 408                 $quotestr = ['quote', 'spoiler'];
 409                 foreach ($quotestr as $quote) {
 410                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 411                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 412
 413                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 414                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 415                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 416
 417                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 418                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 419
 420                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 421
 422                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 423
 424                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 425                         $message = self::saveReplace('/Am (.*?) schrieb <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 426                         $message = self::saveReplace('/Am (.*?) schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 427                         $message = self::saveReplace('/Am (.*?) schrieb (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 428
 429                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 430
 431                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 432
 433                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 434                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 435                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 436                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 437                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 438
 439                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 440                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 441
 442                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 443
 444                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 445
 446                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 447                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 448
 449                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 450
 451                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 452                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 453
 454                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 455
 456                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 457                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 458                         $message = self::saveReplace('/(.*?) schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 459                         $message = self::saveReplace('/(.*?) \((.*?)\) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 460                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 461
 462                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 463                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 464                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 465
 466                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 467                         $message = self::saveReplace('/(.*?) wrote \(.*?\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 468                         $message = self::saveReplace('/(.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 469
 470                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 471
 472                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 473                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) (.*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 474                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 475                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 476
 477                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 478                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 479                 }
 480                 return $message;
 481         }
 482
 483         private static function removeGPG($message)
 484         {
 485                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 486                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 487                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 488
 489                 if (preg_match($pattern, $message, $result)) {
 490                         $cleaned = trim($result[1].$result[2].$result[3]);
 491
 492                         $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 493                 } else {
 494                         $cleaned = $message;
 495                 }
 496
 497                 return $cleaned;
 498         }
 499
 500         private static function removeSig($message)
 501         {
 502                 $sigpos = strrpos($message, "\n-- \n");
 503                 $quotepos = strrpos($message, "[/quote]");
 504
 505                 if ($sigpos == 0) {
 506                         // Especially for web.de who are using that as a separator
 507                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 508                         $sigpos = strrpos($message, "\n-- \n");
 509                         $quotepos = strrpos($message, "[/quote]");
 510                 }
 511
 512                 // When the signature separator is inside a quote, we don't separate
 513                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 514                         return ['body' => $message, 'sig' => ''];
 515                 }
 516
 517                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 518
 519                 preg_match($pattern, $message, $result);
 520
 521                 if (!empty($result[1]) && !empty($result[2])) {
 522                         $cleaned = trim($result[1])."\n";
 523                         $sig = trim($result[2]);
 524                 } else {
 525                         $cleaned = $message;
 526                         $sig = '';
 527                 }
 528
 529                 return ['body' => $cleaned, 'sig' => $sig];
 530         }
 531
 532         private static function removeLinebreak($message)
 533         {
 534                 $arrbody = explode("\n", trim($message));
 535
 536                 $lines = [];
 537                 $lineno = 0;
 538
 539                 foreach ($arrbody as $i => $line) {
 540                         $currquotelevel = 0;
 541                         $currline = $line;
 542                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 543                                 || (substr($currline, 0, 1) == ' '))) {
 544                                 if (substr($currline, 0, 1) == '>') {
 545                                         $currquotelevel++;
 546                                 }
 547
 548                                 $currline = ltrim(substr($currline, 1));
 549                         }
 550
 551                         $quotelevel = 0;
 552                         $nextline = trim(defaults($arrbody, $i + 1, ''));
 553                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 554                                 || (substr($nextline, 0, 1) == ' '))) {
 555                                 if (substr($nextline, 0, 1) == '>') {
 556                                         $quotelevel++;
 557                                 }
 558
 559                                 $nextline = ltrim(substr($nextline, 1));
 560                         }
 561
 562                         $firstword = strpos($nextline.' ', ' ');
 563
 564                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 565                                         (substr(trim($nextline), 0, 1) == '=') ||
 566                                         (substr(trim($nextline), 0, 1) == '*') ||
 567                                         (substr(trim($nextline), 0, 1) == '·') ||
 568                                         (substr(trim($nextline), 0, 4) == '[url') ||
 569                                         (substr(trim($nextline), 0, 5) == '[size') ||
 570                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 571                                         (substr(trim($nextline), 0, 8) == 'https://'));
 572
 573                         if (!$specialchars) {
 574                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 575                                                 (substr(rtrim($line), -1) == '=') ||
 576                                                 (substr(rtrim($line), -1) == '*') ||
 577                                                 (substr(rtrim($line), -1) == '·') ||
 578                                                 (substr(rtrim($line), -6) == '[/url]') ||
 579                                                 (substr(rtrim($line), -7) == '[/size]'));
 580                         }
 581
 582                         if (!empty($lines[$lineno])) {
 583                                 if (substr($lines[$lineno], -1) != ' ') {
 584                                         $lines[$lineno] .= ' ';
 585                                 }
 586
 587                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 588                                         || (substr($line, 0, 1) == ' '))) {
 589
 590                                         $line = ltrim(substr($line, 1));
 591                                 }
 592                         } else {
 593                                 $lines[$lineno] = '';
 594                         }
 595
 596                         $lines[$lineno] .= $line;
 597                         if (((substr($line, -1, 1) != ' '))
 598                                 || ($quotelevel != $currquotelevel)) {
 599                                 $lineno++;
 600                         }
 601                 }
 602                 return implode("\n", $lines);
 603         }
 604
 605         private static function convertQuote($body, $reply)
 606         {
 607                 // Convert Quotes
 608                 $arrbody = explode("\n", trim($body));
 609                 $arrlevel = [];
 610
 611                 for ($i = 0; $i < count($arrbody); $i++) {
 612                         $quotelevel = 0;
 613                         $quoteline = $arrbody[$i];
 614
 615                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 616                                 || (substr($quoteline, 0, 1) == ' '))) {
 617                                 if (substr($quoteline, 0, 1) == '>')
 618                                         $quotelevel++;
 619
 620                                 $quoteline = ltrim(substr($quoteline, 1));
 621                         }
 622
 623                         $arrlevel[$i] = $quotelevel;
 624                         $arrbody[$i] = $quoteline;
 625                 }
 626
 627                 $quotelevel = 0;
 628                 $previousquote = 0;
 629                 $arrbodyquoted = [];
 630
 631                 for ($i = 0; $i < count($arrbody); $i++) {
 632                         $previousquote = $quotelevel;
 633                         $quotelevel = $arrlevel[$i];
 634                         $currline = $arrbody[$i];
 635
 636                         while ($previousquote < $quotelevel) {
 637                                 $quote = "[quote]";
 638                                 $arrbody[$i] = $quote.$arrbody[$i];
 639                                 $previousquote++;
 640                         }
 641
 642                         while ($previousquote > $quotelevel) {
 643                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 644                                 $previousquote--;
 645                         }
 646
 647                         $arrbodyquoted[] = $arrbody[$i];
 648                 }
 649                 while ($quotelevel > 0) {
 650                         $arrbodyquoted[] = '[/quote]';
 651                         $quotelevel--;
 652                 }
 653
 654                 $body = implode("\n", $arrbodyquoted);
 655
 656                 if (strlen($body) > 0) {
 657                         $body = $body."\n\n";
 658                 }
 659
 660                 if ($reply) {
 661                         $body = self::removeToFu($body);
 662                 }
 663
 664                 return $body;
 665         }
 666
 667         private static function removeToFu($message)
 668         {
 669                 $message = trim($message);
 670
 671                 do {
 672                         $oldmessage = $message;
 673                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 674                         $message = str_replace("[/quote][quote]", "", $message);
 675                 } while ($message != $oldmessage);
 676
 677                 $quotes = [];
 678
 679                 $startquotes = 0;
 680
 681                 $start = 0;
 682
 683                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 684                         $quotes[$pos] = -1;
 685                         $start = $pos + 7;
 686                         $startquotes++;
 687                 }
 688
 689                 $endquotes = 0;
 690                 $start = 0;
 691
 692                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 693                         $start = $pos + 7;
 694                         $endquotes++;
 695                 }
 696
 697                 while ($endquotes < $startquotes) {
 698                         $message .= '[/quote]';
 699                         ++$endquotes;
 700                 }
 701
 702                 $start = 0;
 703
 704                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 705                         $quotes[$pos] = 1;
 706                         $start = $pos + 7;
 707                 }
 708
 709                 if (strtolower(substr($message, -8)) != '[/quote]')
 710                         return($message);
 711
 712                 krsort($quotes);
 713
 714                 $quotelevel = 0;
 715                 $quotestart = 0;
 716                 foreach ($quotes as $index => $quote) {
 717                         $quotelevel += $quote;
 718
 719                         if (($quotelevel == 0) and ($quotestart == 0))
 720                                 $quotestart = $index;
 721                 }
 722
 723                 if ($quotestart != 0) {
 724                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 725                 }
 726
 727                 return $message;
 728         }
 729 }