src/Protocol/Email.php

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