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