src/Protocol/Email.php

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