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
  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 $password The password
  20          * @return object
  21          */
  22         public static function connect($mailbox, $username, $password)
  23         {
  24                 if (!function_exists('imap_open')) {
  25                         return false;
  26                 }
  27
  28                 $mbox = @imap_open($mailbox, $username, $password);
  29
  30                 $errors = imap_errors();
  31                 if (!empty($errors)) {
  32                         Logger::log('IMAP Errors occured: ' . json_encode($errors));
  33                 }
  34
  35                 $alerts = imap_alerts();
  36                 if (!empty($alerts)) {
  37                         Logger::log('IMAP Alerts occured: ' . json_encode($alerts));
  38                 }
  39
  40                 return $mbox;
  41         }
  42
  43         /**
  44          * @param object $mbox       mailbox
  45          * @param string $email_addr email
  46          * @return array
  47          */
  48         public static function poll($mbox, $email_addr)
  49         {
  50                 if (!$mbox || !$email_addr) {
  51                         return [];
  52                 }
  53
  54                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  55                 if (!$search1) {
  56                         $search1 = [];
  57                 } else {
  58                         Logger::log("Found mails from ".$email_addr, Logger::DEBUG);
  59                 }
  60
  61                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  62                 if (!$search2) {
  63                         $search2 = [];
  64                 } else {
  65                         Logger::log("Found mails to ".$email_addr, Logger::DEBUG);
  66                 }
  67
  68                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  69                 if (!$search3) {
  70                         $search3 = [];
  71                 } else {
  72                         Logger::log("Found mails cc ".$email_addr, Logger::DEBUG);
  73                 }
  74
  75                 $res = array_unique(array_merge($search1, $search2, $search3));
  76
  77                 return $res;
  78         }
  79
  80         /**
  81          * @param array   $mailacct mail account
  82          * @return string
  83          */
  84         public static function constructMailboxName($mailacct)
  85         {
  86                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  87                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  88                 $ret .= '}' . $mailacct['mailbox'];
  89                 return $ret;
  90         }
  91
  92         /**
  93          * @param object  $mbox mailbox
  94          * @param integer $uid  user id
  95          * @return mixed
  96          */
  97         public static function messageMeta($mbox, $uid)
  98         {
  99                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : [[]]); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
 100                 return (count($ret)) ? $ret : [];
 101         }
 102
 103         /**
 104          * @param object  $mbox  mailbox
 105          * @param integer $uid   user id
 106          * @param string  $reply reply
 107          * @return array
 108          */
 109         public static function getMessage($mbox, $uid, $reply)
 110         {
 111                 $ret = [];
 112
 113                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 114
 115                 if (!$struc) {
 116                         return $ret;
 117                 }
 118
 119                 if (!$struc->parts) {
 120                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 121                         $html = $ret['body'];
 122
 123                         if (trim($ret['body']) == '') {
 124                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 125                         } else {
 126                                 $ret['body'] = HTML::toBBCode($ret['body']);
 127                         }
 128                 } else {
 129                         $text = '';
 130                         $html = '';
 131                         foreach ($struc->parts as $ptop => $p) {
 132                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 133                                 if ($x) {
 134                                         $text .= $x;
 135                                 }
 136
 137                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 138                                 if ($x) {
 139                                         $html .= $x;
 140                                 }
 141                         }
 142                         if (trim($html) != '') {
 143                                 $ret['body'] = HTML::toBBCode($html);
 144                         } else {
 145                                 $ret['body'] = $text;
 146                         }
 147                 }
 148
 149                 $ret['body'] = self::removeGPG($ret['body']);
 150                 $msg = self::removeSig($ret['body']);
 151                 $ret['body'] = $msg['body'];
 152                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 153
 154                 if (trim($html) != '') {
 155                         $ret['body'] = self::removeLinebreak($ret['body']);
 156                 }
 157
 158                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 159
 160                 return $ret;
 161         }
 162
 163         // At the moment - only return plain/text.
 164         // Later we'll repackage inline images as data url's and make the HTML safe
 165         /**
 166          * @param object  $mbox    mailbox
 167          * @param integer $uid     user id
 168          * @param object  $p       parts
 169          * @param integer $partno  part number
 170          * @param string  $subtype sub type
 171          * @return string
 172          */
 173         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 174         {
 175                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 176                 global $htmlmsg,$plainmsg,$charset,$attachments;
 177
 178                 //echo $partno."\n";
 179
 180                 // DECODE DATA
 181                 $data = ($partno)
 182                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 183                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 184
 185                 // Any part may be encoded, even plain text messages, so check everything.
 186                 if ($p->encoding == 4) {
 187                         $data = quoted_printable_decode($data);
 188                 } elseif ($p->encoding == 3) {
 189                         $data = base64_decode($data);
 190                 }
 191
 192                 // PARAMETERS
 193                 // get all parameters, like charset, filenames of attachments, etc.
 194                 $params = [];
 195                 if ($p->parameters) {
 196                         foreach ($p->parameters as $x) {
 197                                 $params[strtolower($x->attribute)] = $x->value;
 198                         }
 199                 }
 200
 201                 if (isset($p->dparameters) && $p->dparameters) {
 202                         foreach ($p->dparameters as $x) {
 203                                 $params[strtolower($x->attribute)] = $x->value;
 204                         }
 205                 }
 206
 207                 // ATTACHMENT
 208                 // Any part with a filename is an attachment,
 209                 // so an attached text file (type 0) is not mistaken as the message.
 210
 211                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 212                         // filename may be given as 'Filename' or 'Name' or both
 213                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 214                         // filename may be encoded, so see imap_mime_header_decode()
 215                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 216                 }
 217
 218                 // TEXT
 219                 if ($p->type == 0 && $data) {
 220                         // Messages may be split in different parts because of inline attachments,
 221                         // so append parts together with blank row.
 222                         if (strtolower($p->subtype)==$subtype) {
 223                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 224                                 return (trim($data) ."\n\n");
 225                         } else {
 226                                 $data = '';
 227                         }
 228
 229                         // $htmlmsg .= $data ."<br><br>";
 230                         $charset = $params['charset'];  // assume all parts are same charset
 231                 }
 232
 233                 // EMBEDDED MESSAGE
 234                 // Many bounce notifications embed the original message as type 2,
 235                 // but AOL uses type 1 (multipart), which is not handled here.
 236                 // There are no PHP functions to parse embedded messages,
 237                 // so this just appends the raw source to the main message.
 238                 //      elseif ($p->type==2 && $data) {
 239                 //              $plainmsg .= $data."\n\n";
 240                 //      }
 241
 242                 // SUBPART RECURSION
 243                 if (isset($p->parts) && $p->parts) {
 244                         $x = "";
 245                         foreach ($p->parts as $partno0 => $p2) {
 246                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 247                                 //if ($x) {
 248                                 //      return $x;
 249                                 //}
 250                         }
 251                         return $x;
 252                 }
 253         }
 254
 255         /**
 256          * @param string $in_str  in string
 257          * @param string $charset character set
 258          * @return string
 259          */
 260         public static function encodeHeader($in_str, $charset)
 261         {
 262                 $out_str = $in_str;
 263                 $need_to_convert = false;
 264
 265                 for ($x = 0; $x < strlen($in_str); $x ++) {
 266                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 267                                 $need_to_convert = true;
 268                         }
 269                 }
 270
 271                 if (!$need_to_convert) {
 272                         return $in_str;
 273                 }
 274
 275                 if ($out_str && $charset) {
 276                         // define start delimimter, end delimiter and spacer
 277                         $end = "?=";
 278                         $start = "=?" . $charset . "?B?";
 279                         $spacer = $end . "\r\n " . $start;
 280
 281                         // determine length of encoded text within chunks
 282                         // and ensure length is even
 283                         $length = 75 - strlen($start) - strlen($end);
 284
 285                         /*
 286                                 [EDIT BY danbrown AT php DOT net: The following
 287                                 is a bugfix provided by (gardan AT gmx DOT de)
 288                                 on 31-MAR-2005 with the following note:
 289                                 "This means: $length should not be even,
 290                                 but divisible by 4. The reason is that in
 291                                 base64-encoding 3 8-bit-chars are represented
 292                                 by 4 6-bit-chars. These 4 chars must not be
 293                                 split between two encoded words, according
 294                                 to RFC-2047.
 295                         */
 296                         $length = $length - ($length % 4);
 297
 298                         // encode the string and split it into chunks
 299                         // with spacers after each chunk
 300                         $out_str = base64_encode($out_str);
 301                         $out_str = chunk_split($out_str, $length, $spacer);
 302
 303                         // remove trailing spacer and
 304                         // add start and end delimiters
 305                         $spacer = preg_quote($spacer, '/');
 306                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 307                         $out_str = $start . $out_str . $end;
 308                 }
 309                 return $out_str;
 310         }
 311
 312         /**
 313          * Function send is used by Protocol::EMAIL and Protocol::EMAIL2 code
 314          * (not to notify the user, but to send items to email contacts)
 315          *
 316          * @param string $addr    address
 317          * @param string $subject subject
 318          * @param string $headers headers
 319          * @param array  $item    item
 320          *
 321          * @return void
 322          *
 323          * @todo This could be changed to use the Emailer class
 324          */
 325         public static function send($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                 $html    = prepare_body($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                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 481                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 482                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 483
 484                 preg_match($pattern, $message, $result);
 485
 486                 $cleaned = trim($result[1].$result[2].$result[3]);
 487
 488                 $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 489
 490                 if ($cleaned == '') {
 491                         $cleaned = $message;
 492                 }
 493
 494                 return $cleaned;
 495         }
 496
 497         private static function removeSig($message)
 498         {
 499                 $sigpos = strrpos($message, "\n-- \n");
 500                 $quotepos = strrpos($message, "[/quote]");
 501
 502                 if ($sigpos == 0) {
 503                         // Especially for web.de who are using that as a separator
 504                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 505                         $sigpos = strrpos($message, "\n-- \n");
 506                         $quotepos = strrpos($message, "[/quote]");
 507                 }
 508
 509                 // When the signature separator is inside a quote, we don't separate
 510                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 511                         return ['body' => $message, 'sig' => ''];
 512                 }
 513
 514                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 515
 516                 preg_match($pattern, $message, $result);
 517
 518                 if (($result[1] != '') && ($result[2] != '')) {
 519                         $cleaned = trim($result[1])."\n";
 520                         $sig = trim($result[2]);
 521                 } else {
 522                         $cleaned = $message;
 523                         $sig = '';
 524                 }
 525
 526                 return ['body' => $cleaned, 'sig' => $sig];
 527         }
 528
 529         private static function removeLinebreak($message)
 530         {
 531                 $arrbody = explode("\n", trim($message));
 532
 533                 $lines = [];
 534                 $lineno = 0;
 535
 536                 foreach ($arrbody as $i => $line) {
 537                         $currquotelevel = 0;
 538                         $currline = $line;
 539                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 540                                 || (substr($currline, 0, 1) == ' '))) {
 541                                 if (substr($currline, 0, 1) == '>') {
 542                                         $currquotelevel++;
 543                                 }
 544
 545                                 $currline = ltrim(substr($currline, 1));
 546                         }
 547
 548                         $quotelevel = 0;
 549                         $nextline = trim($arrbody[$i+1]);
 550                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 551                                 || (substr($nextline, 0, 1) == ' '))) {
 552                                 if (substr($nextline, 0, 1) == '>') {
 553                                         $quotelevel++;
 554                                 }
 555
 556                                 $nextline = ltrim(substr($nextline, 1));
 557                         }
 558
 559                         $firstword = strpos($nextline.' ', ' ');
 560
 561                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 562                                         (substr(trim($nextline), 0, 1) == '=') ||
 563                                         (substr(trim($nextline), 0, 1) == '*') ||
 564                                         (substr(trim($nextline), 0, 1) == '·') ||
 565                                         (substr(trim($nextline), 0, 4) == '[url') ||
 566                                         (substr(trim($nextline), 0, 5) == '[size') ||
 567                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 568                                         (substr(trim($nextline), 0, 8) == 'https://'));
 569
 570                         if (!$specialchars) {
 571                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 572                                                 (substr(rtrim($line), -1) == '=') ||
 573                                                 (substr(rtrim($line), -1) == '*') ||
 574                                                 (substr(rtrim($line), -1) == '·') ||
 575                                                 (substr(rtrim($line), -6) == '[/url]') ||
 576                                                 (substr(rtrim($line), -7) == '[/size]'));
 577                         }
 578
 579                         if ($lines[$lineno] != '') {
 580                                 if (substr($lines[$lineno], -1) != ' ') {
 581                                         $lines[$lineno] .= ' ';
 582                                 }
 583
 584                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 585                                         || (substr($line, 0, 1) == ' '))) {
 586
 587                                         $line = ltrim(substr($line, 1));
 588                                 }
 589                         }
 590
 591                         $lines[$lineno] .= $line;
 592                         if (((substr($line, -1, 1) != ' '))
 593                                 || ($quotelevel != $currquotelevel)) {
 594                                 $lineno++;
 595                                 }
 596                 }
 597                 return implode("\n", $lines);
 598         }
 599
 600         private static function convertQuote($body, $reply)
 601         {
 602                 // Convert Quotes
 603                 $arrbody = explode("\n", trim($body));
 604                 $arrlevel = [];
 605
 606                 for ($i = 0; $i < count($arrbody); $i++) {
 607                         $quotelevel = 0;
 608                         $quoteline = $arrbody[$i];
 609
 610                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 611                                 || (substr($quoteline, 0, 1) == ' '))) {
 612                                 if (substr($quoteline, 0, 1) == '>')
 613                                         $quotelevel++;
 614
 615                                 $quoteline = ltrim(substr($quoteline, 1));
 616                         }
 617
 618                         $arrlevel[$i] = $quotelevel;
 619                         $arrbody[$i] = $quoteline;
 620                 }
 621
 622                 $quotelevel = 0;
 623                 $previousquote = 0;
 624                 $arrbodyquoted = [];
 625
 626                 for ($i = 0; $i < count($arrbody); $i++) {
 627                         $previousquote = $quotelevel;
 628                         $quotelevel = $arrlevel[$i];
 629                         $currline = $arrbody[$i];
 630
 631                         while ($previousquote < $quotelevel) {
 632                                 $quote = "[quote]";
 633                                 $arrbody[$i] = $quote.$arrbody[$i];
 634                                 $previousquote++;
 635                         }
 636
 637                         while ($previousquote > $quotelevel) {
 638                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 639                                 $previousquote--;
 640                         }
 641
 642                         $arrbodyquoted[] = $arrbody[$i];
 643                 }
 644                 while ($quotelevel > 0) {
 645                         $arrbodyquoted[] = '[/quote]';
 646                         $quotelevel--;
 647                 }
 648
 649                 $body = implode("\n", $arrbodyquoted);
 650
 651                 if (strlen($body) > 0) {
 652                         $body = $body."\n\n";
 653                 }
 654
 655                 if ($reply) {
 656                         $body = self::removeToFu($body);
 657                 }
 658
 659                 return $body;
 660         }
 661
 662         private static function removeToFu($message)
 663         {
 664                 $message = trim($message);
 665
 666                 do {
 667                         $oldmessage = $message;
 668                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 669                         $message = str_replace("[/quote][quote]", "", $message);
 670                 } while ($message != $oldmessage);
 671
 672                 $quotes = [];
 673
 674                 $startquotes = 0;
 675
 676                 $start = 0;
 677
 678                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 679                         $quotes[$pos] = -1;
 680                         $start = $pos + 7;
 681                         $startquotes++;
 682                 }
 683
 684                 $endquotes = 0;
 685                 $start = 0;
 686
 687                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 688                         $start = $pos + 7;
 689                         $endquotes++;
 690                 }
 691
 692                 while ($endquotes < $startquotes) {
 693                         $message .= '[/quote]';
 694                         ++$endquotes;
 695                 }
 696
 697                 $start = 0;
 698
 699                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 700                         $quotes[$pos] = 1;
 701                         $start = $pos + 7;
 702                 }
 703
 704                 if (strtolower(substr($message, -8)) != '[/quote]')
 705                         return($message);
 706
 707                 krsort($quotes);
 708
 709                 $quotelevel = 0;
 710                 $quotestart = 0;
 711                 foreach ($quotes as $index => $quote) {
 712                         $quotelevel += $quote;
 713
 714                         if (($quotelevel == 0) and ($quotestart == 0))
 715                                 $quotestart = $index;
 716                 }
 717
 718                 if ($quotestart != 0) {
 719                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 720                 }
 721
 722                 return $message;
 723         }
 724 }