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\Core\Protocol;
  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 $password The password
  21          * @return object
  22          * @throws \Exception
  23          */
  24         public static function connect($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 object $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 object  $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 object  $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                                 $ret['body'] = HTML::toBBCode($ret['body']);
 131                         }
 132                 } else {
 133                         $text = '';
 134                         $html = '';
 135                         foreach ($struc->parts as $ptop => $p) {
 136                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 137                                 if ($x) {
 138                                         $text .= $x;
 139                                 }
 140
 141                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 142                                 if ($x) {
 143                                         $html .= $x;
 144                                 }
 145                         }
 146                         if (trim($html) != '') {
 147                                 $ret['body'] = HTML::toBBCode($html);
 148                         } else {
 149                                 $ret['body'] = $text;
 150                         }
 151                 }
 152
 153                 $ret['body'] = self::removeGPG($ret['body']);
 154                 $msg = self::removeSig($ret['body']);
 155                 $ret['body'] = $msg['body'];
 156                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 157
 158                 if (trim($html) != '') {
 159                         $ret['body'] = self::removeLinebreak($ret['body']);
 160                 }
 161
 162                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 163
 164                 return $ret;
 165         }
 166
 167         // At the moment - only return plain/text.
 168         // Later we'll repackage inline images as data url's and make the HTML safe
 169         /**
 170          * @param object  $mbox    mailbox
 171          * @param integer $uid     user id
 172          * @param object  $p       parts
 173          * @param integer $partno  part number
 174          * @param string  $subtype sub type
 175          * @return string
 176          */
 177         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 178         {
 179                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 180                 global $htmlmsg,$plainmsg,$charset,$attachments;
 181
 182                 //echo $partno."\n";
 183
 184                 // DECODE DATA
 185                 $data = ($partno)
 186                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 187                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 188
 189                 // Any part may be encoded, even plain text messages, so check everything.
 190                 if ($p->encoding == 4) {
 191                         $data = quoted_printable_decode($data);
 192                 } elseif ($p->encoding == 3) {
 193                         $data = base64_decode($data);
 194                 }
 195
 196                 // PARAMETERS
 197                 // get all parameters, like charset, filenames of attachments, etc.
 198                 $params = [];
 199                 if ($p->parameters) {
 200                         foreach ($p->parameters as $x) {
 201                                 $params[strtolower($x->attribute)] = $x->value;
 202                         }
 203                 }
 204
 205                 if (isset($p->dparameters) && $p->dparameters) {
 206                         foreach ($p->dparameters as $x) {
 207                                 $params[strtolower($x->attribute)] = $x->value;
 208                         }
 209                 }
 210
 211                 // ATTACHMENT
 212                 // Any part with a filename is an attachment,
 213                 // so an attached text file (type 0) is not mistaken as the message.
 214
 215                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 216                         // filename may be given as 'Filename' or 'Name' or both
 217                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 218                         // filename may be encoded, so see imap_mime_header_decode()
 219                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 220                 }
 221
 222                 // TEXT
 223                 if ($p->type == 0 && $data) {
 224                         // Messages may be split in different parts because of inline attachments,
 225                         // so append parts together with blank row.
 226                         if (strtolower($p->subtype)==$subtype) {
 227                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 228                                 return (trim($data) ."\n\n");
 229                         } else {
 230                                 $data = '';
 231                         }
 232
 233                         // $htmlmsg .= $data ."<br><br>";
 234                         $charset = $params['charset'];  // assume all parts are same charset
 235                 }
 236
 237                 // EMBEDDED MESSAGE
 238                 // Many bounce notifications embed the original message as type 2,
 239                 // but AOL uses type 1 (multipart), which is not handled here.
 240                 // There are no PHP functions to parse embedded messages,
 241                 // so this just appends the raw source to the main message.
 242                 //      elseif ($p->type==2 && $data) {
 243                 //              $plainmsg .= $data."\n\n";
 244                 //      }
 245
 246                 // SUBPART RECURSION
 247                 if (isset($p->parts) && $p->parts) {
 248                         $x = "";
 249                         foreach ($p->parts as $partno0 => $p2) {
 250                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 251                                 //if ($x) {
 252                                 //      return $x;
 253                                 //}
 254                         }
 255                         return $x;
 256                 }
 257         }
 258
 259         /**
 260          * @param string $in_str  in string
 261          * @param string $charset character set
 262          * @return string
 263          */
 264         public static function encodeHeader($in_str, $charset)
 265         {
 266                 $out_str = $in_str;
 267                 $need_to_convert = false;
 268
 269                 for ($x = 0; $x < strlen($in_str); $x ++) {
 270                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 271                                 $need_to_convert = true;
 272                         }
 273                 }
 274
 275                 if (!$need_to_convert) {
 276                         return $in_str;
 277                 }
 278
 279                 if ($out_str && $charset) {
 280                         // define start delimimter, end delimiter and spacer
 281                         $end = "?=";
 282                         $start = "=?" . $charset . "?B?";
 283                         $spacer = $end . "\r\n " . $start;
 284
 285                         // determine length of encoded text within chunks
 286                         // and ensure length is even
 287                         $length = 75 - strlen($start) - strlen($end);
 288
 289                         /*
 290                                 [EDIT BY danbrown AT php DOT net: The following
 291                                 is a bugfix provided by (gardan AT gmx DOT de)
 292                                 on 31-MAR-2005 with the following note:
 293                                 "This means: $length should not be even,
 294                                 but divisible by 4. The reason is that in
 295                                 base64-encoding 3 8-bit-chars are represented
 296                                 by 4 6-bit-chars. These 4 chars must not be
 297                                 split between two encoded words, according
 298                                 to RFC-2047.
 299                         */
 300                         $length = $length - ($length % 4);
 301
 302                         // encode the string and split it into chunks
 303                         // with spacers after each chunk
 304                         $out_str = base64_encode($out_str);
 305                         $out_str = chunk_split($out_str, $length, $spacer);
 306
 307                         // remove trailing spacer and
 308                         // add start and end delimiters
 309                         $spacer = preg_quote($spacer, '/');
 310                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 311                         $out_str = $start . $out_str . $end;
 312                 }
 313                 return $out_str;
 314         }
 315
 316         /**
 317          * Function send is used by Protocol::EMAIL and Protocol::EMAIL2 code
 318          * (not to notify the user, but to send items to email contacts)
 319          *
 320          * @param string $addr    address
 321          * @param string $subject subject
 322          * @param string $headers headers
 323          * @param array  $item    item
 324          *
 325          * @return void
 326          *
 327          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 328          * @throws \ImagickException
 329          * @todo This could be changed to use the Emailer class
 330          */
 331         public static function send($addr, $subject, $headers, $item)
 332         {
 333                 //$headers .= 'MIME-Version: 1.0' . "\n";
 334                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 335                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 336                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 337
 338                 $part = uniqid("", true);
 339
 340                 $html    = Item::prepareBody($item);
 341
 342                 $headers .= "Mime-Version: 1.0\n";
 343                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 344
 345                 $body = "\n--=_".$part."\n";
 346                 $body .= "Content-Transfer-Encoding: 8bit\n";
 347                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 348
 349                 $body .= HTML::toPlaintext($html)."\n";
 350
 351                 $body .= "--=_".$part."\n";
 352                 $body .= "Content-Transfer-Encoding: 8bit\n";
 353                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 354
 355                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 356
 357                 $body .= "--=_".$part."--";
 358
 359                 //$message = '<html><body>' . $html . '</body></html>';
 360                 //$message = html2plain($html);
 361                 Logger::log('notifier: email delivery to ' . $addr);
 362                 mail($addr, $subject, $body, $headers);
 363         }
 364
 365         /**
 366          * @param string $iri string
 367          * @return string
 368          */
 369         public static function iri2msgid($iri)
 370         {
 371                 if (!strpos($iri, "@")) {
 372                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 373                 } else {
 374                         $msgid = $iri;
 375                 }
 376
 377                 return $msgid;
 378         }
 379
 380         /**
 381          * @param string $msgid msgid
 382          * @return string
 383          */
 384         public static function msgid2iri($msgid)
 385         {
 386                 if (strpos($msgid, "@")) {
 387                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 388                 } else {
 389                         $iri = $msgid;
 390                 }
 391
 392                 return $iri;
 393         }
 394
 395         private static function saveReplace($pattern, $replace, $text)
 396         {
 397                 $save = $text;
 398
 399                 $text = preg_replace($pattern, $replace, $text);
 400
 401                 if ($text == '') {
 402                         $text = $save;
 403                 }
 404                 return $text;
 405         }
 406
 407         private static function unifyAttributionLine($message)
 408         {
 409                 $quotestr = ['quote', 'spoiler'];
 410                 foreach ($quotestr as $quote) {
 411                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 412                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 413
 414                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 415                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 416                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 417
 418                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 419                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 420
 421                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 422
 423                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 424
 425                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 426                         $message = self::saveReplace('/Am (.*?) schrieb <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 427                         $message = self::saveReplace('/Am (.*?) schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 428                         $message = self::saveReplace('/Am (.*?) schrieb (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 429
 430                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 431
 432                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 433
 434                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 435                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 436                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 437                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 438                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 439
 440                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 441                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 442
 443                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 444
 445                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 446
 447                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 448                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 449
 450                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 451
 452                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 453                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 454
 455                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 456
 457                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 458                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 459                         $message = self::saveReplace('/(.*?) schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 460                         $message = self::saveReplace('/(.*?) \((.*?)\) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 461                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 462
 463                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 464                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 465                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 466
 467                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 468                         $message = self::saveReplace('/(.*?) wrote \(.*?\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 469                         $message = self::saveReplace('/(.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 470
 471                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 472
 473                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 474                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) (.*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 475                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 476                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 477
 478                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 479                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 480                 }
 481                 return $message;
 482         }
 483
 484         private static function removeGPG($message)
 485         {
 486                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 487                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 488                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 489
 490                 if (preg_match($pattern, $message, $result)) {
 491                         $cleaned = trim($result[1].$result[2].$result[3]);
 492
 493                         $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 494                 } else {
 495                         $cleaned = $message;
 496                 }
 497
 498                 return $cleaned;
 499         }
 500
 501         private static function removeSig($message)
 502         {
 503                 $sigpos = strrpos($message, "\n-- \n");
 504                 $quotepos = strrpos($message, "[/quote]");
 505
 506                 if ($sigpos == 0) {
 507                         // Especially for web.de who are using that as a separator
 508                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 509                         $sigpos = strrpos($message, "\n-- \n");
 510                         $quotepos = strrpos($message, "[/quote]");
 511                 }
 512
 513                 // When the signature separator is inside a quote, we don't separate
 514                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 515                         return ['body' => $message, 'sig' => ''];
 516                 }
 517
 518                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 519
 520                 preg_match($pattern, $message, $result);
 521
 522                 if (!empty($result[1]) && !empty($result[2])) {
 523                         $cleaned = trim($result[1])."\n";
 524                         $sig = trim($result[2]);
 525                 } else {
 526                         $cleaned = $message;
 527                         $sig = '';
 528                 }
 529
 530                 return ['body' => $cleaned, 'sig' => $sig];
 531         }
 532
 533         private static function removeLinebreak($message)
 534         {
 535                 $arrbody = explode("\n", trim($message));
 536
 537                 $lines = [];
 538                 $lineno = 0;
 539
 540                 foreach ($arrbody as $i => $line) {
 541                         $currquotelevel = 0;
 542                         $currline = $line;
 543                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 544                                 || (substr($currline, 0, 1) == ' '))) {
 545                                 if (substr($currline, 0, 1) == '>') {
 546                                         $currquotelevel++;
 547                                 }
 548
 549                                 $currline = ltrim(substr($currline, 1));
 550                         }
 551
 552                         $quotelevel = 0;
 553                         $nextline = trim(defaults($arrbody, $i + 1, ''));
 554                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 555                                 || (substr($nextline, 0, 1) == ' '))) {
 556                                 if (substr($nextline, 0, 1) == '>') {
 557                                         $quotelevel++;
 558                                 }
 559
 560                                 $nextline = ltrim(substr($nextline, 1));
 561                         }
 562
 563                         $firstword = strpos($nextline.' ', ' ');
 564
 565                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 566                                         (substr(trim($nextline), 0, 1) == '=') ||
 567                                         (substr(trim($nextline), 0, 1) == '*') ||
 568                                         (substr(trim($nextline), 0, 1) == '·') ||
 569                                         (substr(trim($nextline), 0, 4) == '[url') ||
 570                                         (substr(trim($nextline), 0, 5) == '[size') ||
 571                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 572                                         (substr(trim($nextline), 0, 8) == 'https://'));
 573
 574                         if (!$specialchars) {
 575                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 576                                                 (substr(rtrim($line), -1) == '=') ||
 577                                                 (substr(rtrim($line), -1) == '*') ||
 578                                                 (substr(rtrim($line), -1) == '·') ||
 579                                                 (substr(rtrim($line), -6) == '[/url]') ||
 580                                                 (substr(rtrim($line), -7) == '[/size]'));
 581                         }
 582
 583                         if (!empty($lines[$lineno])) {
 584                                 if (substr($lines[$lineno], -1) != ' ') {
 585                                         $lines[$lineno] .= ' ';
 586                                 }
 587
 588                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 589                                         || (substr($line, 0, 1) == ' '))) {
 590
 591                                         $line = ltrim(substr($line, 1));
 592                                 }
 593                         } else {
 594                                 $lines[$lineno] = '';
 595                         }
 596
 597                         $lines[$lineno] .= $line;
 598                         if (((substr($line, -1, 1) != ' '))
 599                                 || ($quotelevel != $currquotelevel)) {
 600                                 $lineno++;
 601                         }
 602                 }
 603                 return implode("\n", $lines);
 604         }
 605
 606         private static function convertQuote($body, $reply)
 607         {
 608                 // Convert Quotes
 609                 $arrbody = explode("\n", trim($body));
 610                 $arrlevel = [];
 611
 612                 for ($i = 0; $i < count($arrbody); $i++) {
 613                         $quotelevel = 0;
 614                         $quoteline = $arrbody[$i];
 615
 616                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 617                                 || (substr($quoteline, 0, 1) == ' '))) {
 618                                 if (substr($quoteline, 0, 1) == '>')
 619                                         $quotelevel++;
 620
 621                                 $quoteline = ltrim(substr($quoteline, 1));
 622                         }
 623
 624                         $arrlevel[$i] = $quotelevel;
 625                         $arrbody[$i] = $quoteline;
 626                 }
 627
 628                 $quotelevel = 0;
 629                 $previousquote = 0;
 630                 $arrbodyquoted = [];
 631
 632                 for ($i = 0; $i < count($arrbody); $i++) {
 633                         $previousquote = $quotelevel;
 634                         $quotelevel = $arrlevel[$i];
 635                         $currline = $arrbody[$i];
 636
 637                         while ($previousquote < $quotelevel) {
 638                                 $quote = "[quote]";
 639                                 $arrbody[$i] = $quote.$arrbody[$i];
 640                                 $previousquote++;
 641                         }
 642
 643                         while ($previousquote > $quotelevel) {
 644                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 645                                 $previousquote--;
 646                         }
 647
 648                         $arrbodyquoted[] = $arrbody[$i];
 649                 }
 650                 while ($quotelevel > 0) {
 651                         $arrbodyquoted[] = '[/quote]';
 652                         $quotelevel--;
 653                 }
 654
 655                 $body = implode("\n", $arrbodyquoted);
 656
 657                 if (strlen($body) > 0) {
 658                         $body = $body."\n\n";
 659                 }
 660
 661                 if ($reply) {
 662                         $body = self::removeToFu($body);
 663                 }
 664
 665                 return $body;
 666         }
 667
 668         private static function removeToFu($message)
 669         {
 670                 $message = trim($message);
 671
 672                 do {
 673                         $oldmessage = $message;
 674                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 675                         $message = str_replace("[/quote][quote]", "", $message);
 676                 } while ($message != $oldmessage);
 677
 678                 $quotes = [];
 679
 680                 $startquotes = 0;
 681
 682                 $start = 0;
 683
 684                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 685                         $quotes[$pos] = -1;
 686                         $start = $pos + 7;
 687                         $startquotes++;
 688                 }
 689
 690                 $endquotes = 0;
 691                 $start = 0;
 692
 693                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 694                         $start = $pos + 7;
 695                         $endquotes++;
 696                 }
 697
 698                 while ($endquotes < $startquotes) {
 699                         $message .= '[/quote]';
 700                         ++$endquotes;
 701                 }
 702
 703                 $start = 0;
 704
 705                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 706                         $quotes[$pos] = 1;
 707                         $start = $pos + 7;
 708                 }
 709
 710                 if (strtolower(substr($message, -8)) != '[/quote]')
 711                         return($message);
 712
 713                 krsort($quotes);
 714
 715                 $quotelevel = 0;
 716                 $quotestart = 0;
 717                 foreach ($quotes as $index => $quote) {
 718                         $quotelevel += $quote;
 719
 720                         if (($quotelevel == 0) and ($quotestart == 0))
 721                                 $quotestart = $index;
 722                 }
 723
 724                 if ($quotestart != 0) {
 725                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 726                 }
 727
 728                 return $message;
 729         }
 730 }