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