src/Protocol/Email.php

   1 <?php
   2 /**
   3  * @file src/Protocol/Email.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use Friendica\Content\Text\HTML;
   8 use Friendica\Core\Protocol;
   9
  10 /**
  11  * @brief Email class
  12  */
  13 class Email
  14 {
  15         /**
  16          * @param string $mailbox  The mailbox name
  17          * @param string $username The username
  18          * @param string $password The password
  19          * @return object
  20          */
  21         public static function connect($mailbox, $username, $password)
  22         {
  23                 if (!function_exists('imap_open')) {
  24                         return false;
  25                 }
  26
  27                 $mbox = @imap_open($mailbox, $username, $password);
  28
  29                 $errors = imap_errors();
  30                 if (!empty($errors)) {
  31                         logger('IMAP Errors occured: ' . json_encode($errors));
  32                 }
  33
  34                 $alerts = imap_alerts();
  35                 if (!empty($alerts)) {
  36                         logger('IMAP Alerts occured: ' . json_encode($alerts));
  37                 }
  38
  39                 return $mbox;
  40         }
  41
  42         /**
  43          * @param object $mbox       mailbox
  44          * @param string $email_addr email
  45          * @return array
  46          */
  47         public static function poll($mbox, $email_addr)
  48         {
  49                 if (!$mbox || !$email_addr) {
  50                         return [];
  51                 }
  52
  53                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  54                 if (!$search1) {
  55                         $search1 = [];
  56                 } else {
  57                         logger("Found mails from ".$email_addr, LOGGER_DEBUG);
  58                 }
  59
  60                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  61                 if (!$search2) {
  62                         $search2 = [];
  63                 } else {
  64                         logger("Found mails to ".$email_addr, LOGGER_DEBUG);
  65                 }
  66
  67                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  68                 if (!$search3) {
  69                         $search3 = [];
  70                 } else {
  71                         logger("Found mails cc ".$email_addr, LOGGER_DEBUG);
  72                 }
  73
  74                 $res = array_unique(array_merge($search1, $search2, $search3));
  75
  76                 return $res;
  77         }
  78
  79         /**
  80          * @param array   $mailacct mail account
  81          * @return string
  82          */
  83         public static function constructMailboxName($mailacct)
  84         {
  85                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  86                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  87                 $ret .= '}' . $mailacct['mailbox'];
  88                 return $ret;
  89         }
  90
  91         /**
  92          * @param object  $mbox mailbox
  93          * @param integer $uid  user id
  94          * @return mixed
  95          */
  96         public static function messageMeta($mbox, $uid)
  97         {
  98                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : [[]]); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
  99                 return (count($ret)) ? $ret : [];
 100         }
 101
 102         /**
 103          * @param object  $mbox  mailbox
 104          * @param integer $uid   user id
 105          * @param string  $reply reply
 106          * @return array
 107          */
 108         public static function getMessage($mbox, $uid, $reply)
 109         {
 110                 $ret = [];
 111
 112                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 113
 114                 if (!$struc) {
 115                         return $ret;
 116                 }
 117
 118                 if (!$struc->parts) {
 119                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 120                         $html = $ret['body'];
 121
 122                         if (trim($ret['body']) == '') {
 123                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 124                         } else {
 125                                 $ret['body'] = HTML::toBBCode($ret['body']);
 126                         }
 127                 } else {
 128                         $text = '';
 129                         $html = '';
 130                         foreach ($struc->parts as $ptop => $p) {
 131                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 132                                 if ($x) {
 133                                         $text .= $x;
 134                                 }
 135
 136                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 137                                 if ($x) {
 138                                         $html .= $x;
 139                                 }
 140                         }
 141                         if (trim($html) != '') {
 142                                 $ret['body'] = HTML::toBBCode($html);
 143                         } else {
 144                                 $ret['body'] = $text;
 145                         }
 146                 }
 147
 148                 $ret['body'] = self::removeGPG($ret['body']);
 149                 $msg = self::removeSig($ret['body']);
 150                 $ret['body'] = $msg['body'];
 151                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 152
 153                 if (trim($html) != '') {
 154                         $ret['body'] = self::removeLinebreak($ret['body']);
 155                 }
 156
 157                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 158
 159                 return $ret;
 160         }
 161
 162         // At the moment - only return plain/text.
 163         // Later we'll repackage inline images as data url's and make the HTML safe
 164         /**
 165          * @param object  $mbox    mailbox
 166          * @param integer $uid     user id
 167          * @param object  $p       parts
 168          * @param integer $partno  part number
 169          * @param string  $subtype sub type
 170          * @return string
 171          */
 172         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 173         {
 174                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 175                 global $htmlmsg,$plainmsg,$charset,$attachments;
 176
 177                 //echo $partno."\n";
 178
 179                 // DECODE DATA
 180                 $data = ($partno)
 181                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 182                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 183
 184                 // Any part may be encoded, even plain text messages, so check everything.
 185                 if ($p->encoding == 4) {
 186                         $data = quoted_printable_decode($data);
 187                 } elseif ($p->encoding == 3) {
 188                         $data = base64_decode($data);
 189                 }
 190
 191                 // PARAMETERS
 192                 // get all parameters, like charset, filenames of attachments, etc.
 193                 $params = [];
 194                 if ($p->parameters) {
 195                         foreach ($p->parameters as $x) {
 196                                 $params[strtolower($x->attribute)] = $x->value;
 197                         }
 198                 }
 199
 200                 if (isset($p->dparameters) && $p->dparameters) {
 201                         foreach ($p->dparameters as $x) {
 202                                 $params[strtolower($x->attribute)] = $x->value;
 203                         }
 204                 }
 205
 206                 // ATTACHMENT
 207                 // Any part with a filename is an attachment,
 208                 // so an attached text file (type 0) is not mistaken as the message.
 209
 210                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 211                         // filename may be given as 'Filename' or 'Name' or both
 212                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 213                         // filename may be encoded, so see imap_mime_header_decode()
 214                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 215                 }
 216
 217                 // TEXT
 218                 if ($p->type == 0 && $data) {
 219                         // Messages may be split in different parts because of inline attachments,
 220                         // so append parts together with blank row.
 221                         if (strtolower($p->subtype)==$subtype) {
 222                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 223                                 return (trim($data) ."\n\n");
 224                         } else {
 225                                 $data = '';
 226                         }
 227
 228                         // $htmlmsg .= $data ."<br><br>";
 229                         $charset = $params['charset'];  // assume all parts are same charset
 230                 }
 231
 232                 // EMBEDDED MESSAGE
 233                 // Many bounce notifications embed the original message as type 2,
 234                 // but AOL uses type 1 (multipart), which is not handled here.
 235                 // There are no PHP functions to parse embedded messages,
 236                 // so this just appends the raw source to the main message.
 237                 //      elseif ($p->type==2 && $data) {
 238                 //              $plainmsg .= $data."\n\n";
 239                 //      }
 240
 241                 // SUBPART RECURSION
 242                 if (isset($p->parts) && $p->parts) {
 243                         $x = "";
 244                         foreach ($p->parts as $partno0 => $p2) {
 245                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 246                                 //if ($x) {
 247                                 //      return $x;
 248                                 //}
 249                         }
 250                         return $x;
 251                 }
 252         }
 253
 254         /**
 255          * @param string $in_str  in string
 256          * @param string $charset character set
 257          * @return string
 258          */
 259         public static function encodeHeader($in_str, $charset)
 260         {
 261                 $out_str = $in_str;
 262                 $need_to_convert = false;
 263
 264                 for ($x = 0; $x < strlen($in_str); $x ++) {
 265                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 266                                 $need_to_convert = true;
 267                         }
 268                 }
 269
 270                 if (!$need_to_convert) {
 271                         return $in_str;
 272                 }
 273
 274                 if ($out_str && $charset) {
 275                         // define start delimimter, end delimiter and spacer
 276                         $end = "?=";
 277                         $start = "=?" . $charset . "?B?";
 278                         $spacer = $end . "\r\n " . $start;
 279
 280                         // determine length of encoded text within chunks
 281                         // and ensure length is even
 282                         $length = 75 - strlen($start) - strlen($end);
 283
 284                         /*
 285                                 [EDIT BY danbrown AT php DOT net: The following
 286                                 is a bugfix provided by (gardan AT gmx DOT de)
 287                                 on 31-MAR-2005 with the following note:
 288                                 "This means: $length should not be even,
 289                                 but divisible by 4. The reason is that in
 290                                 base64-encoding 3 8-bit-chars are represented
 291                                 by 4 6-bit-chars. These 4 chars must not be
 292                                 split between two encoded words, according
 293                                 to RFC-2047.
 294                         */
 295                         $length = $length - ($length % 4);
 296
 297                         // encode the string and split it into chunks
 298                         // with spacers after each chunk
 299                         $out_str = base64_encode($out_str);
 300                         $out_str = chunk_split($out_str, $length, $spacer);
 301
 302                         // remove trailing spacer and
 303                         // add start and end delimiters
 304                         $spacer = preg_quote($spacer, '/');
 305                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 306                         $out_str = $start . $out_str . $end;
 307                 }
 308                 return $out_str;
 309         }
 310
 311         /**
 312          * Function send is used by Protocol::EMAIL and Protocol::EMAIL2 code
 313          * (not to notify the user, but to send items to email contacts)
 314          *
 315          * @param string $addr    address
 316          * @param string $subject subject
 317          * @param string $headers headers
 318          * @param array  $item    item
 319          *
 320          * @return void
 321          *
 322          * @todo This could be changed to use the Emailer class
 323          */
 324         public static function send($addr, $subject, $headers, $item)
 325         {
 326                 //$headers .= 'MIME-Version: 1.0' . "\n";
 327                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 328                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 329                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 330
 331                 $part = uniqid("", true);
 332
 333                 $html    = prepare_body($item);
 334
 335                 $headers .= "Mime-Version: 1.0\n";
 336                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 337
 338                 $body = "\n--=_".$part."\n";
 339                 $body .= "Content-Transfer-Encoding: 8bit\n";
 340                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 341
 342                 $body .= HTML::toPlaintext($html)."\n";
 343
 344                 $body .= "--=_".$part."\n";
 345                 $body .= "Content-Transfer-Encoding: 8bit\n";
 346                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 347
 348                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 349
 350                 $body .= "--=_".$part."--";
 351
 352                 //$message = '<html><body>' . $html . '</body></html>';
 353                 //$message = html2plain($html);
 354                 logger('notifier: email delivery to ' . $addr);
 355                 mail($addr, $subject, $body, $headers);
 356         }
 357
 358         /**
 359          * @param string $iri string
 360          * @return string
 361          */
 362         public static function iri2msgid($iri)
 363         {
 364                 if (!strpos($iri, "@")) {
 365                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 366                 } else {
 367                         $msgid = $iri;
 368                 }
 369
 370                 return $msgid;
 371         }
 372
 373         /**
 374          * @param string $msgid msgid
 375          * @return string
 376          */
 377         public static function msgid2iri($msgid)
 378         {
 379                 if (strpos($msgid, "@")) {
 380                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 381                 } else {
 382                         $iri = $msgid;
 383                 }
 384
 385                 return $iri;
 386         }
 387
 388         private static function saveReplace($pattern, $replace, $text)
 389         {
 390                 $save = $text;
 391
 392                 $text = preg_replace($pattern, $replace, $text);
 393
 394                 if ($text == '') {
 395                         $text = $save;
 396                 }
 397                 return $text;
 398         }
 399
 400         private static function unifyAttributionLine($message)
 401         {
 402                 $quotestr = ['quote', 'spoiler'];
 403                 foreach ($quotestr as $quote) {
 404                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 405                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 406
 407                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 408                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 409                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 410
 411                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 412                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 413
 414                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 415
 416                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 417
 418                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 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 (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 422
 423                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 424
 425                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 426
 427                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 428                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 429                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 430                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 431                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 432
 433                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 434                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 435
 436                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 437
 438                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 439
 440                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 441                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 442
 443                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 444
 445                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 446                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 447
 448                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 449
 450                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 451                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\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:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 454                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 455
 456                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 457                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 458                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 459
 460                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 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
 464                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 465
 466                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 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
 471                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 472                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 473                 }
 474                 return $message;
 475         }
 476
 477         private static function removeGPG($message)
 478         {
 479                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 480                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 481                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 482
 483                 preg_match($pattern, $message, $result);
 484
 485                 $cleaned = trim($result[1].$result[2].$result[3]);
 486
 487                 $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 488
 489                 if ($cleaned == '') {
 490                         $cleaned = $message;
 491                 }
 492
 493                 return $cleaned;
 494         }
 495
 496         private static function removeSig($message)
 497         {
 498                 $sigpos = strrpos($message, "\n-- \n");
 499                 $quotepos = strrpos($message, "[/quote]");
 500
 501                 if ($sigpos == 0) {
 502                         // Especially for web.de who are using that as a separator
 503                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 504                         $sigpos = strrpos($message, "\n-- \n");
 505                         $quotepos = strrpos($message, "[/quote]");
 506                 }
 507
 508                 // When the signature separator is inside a quote, we don't separate
 509                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 510                         return ['body' => $message, 'sig' => ''];
 511                 }
 512
 513                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 514
 515                 preg_match($pattern, $message, $result);
 516
 517                 if (($result[1] != '') && ($result[2] != '')) {
 518                         $cleaned = trim($result[1])."\n";
 519                         $sig = trim($result[2]);
 520                 } else {
 521                         $cleaned = $message;
 522                         $sig = '';
 523                 }
 524
 525                 return ['body' => $cleaned, 'sig' => $sig];
 526         }
 527
 528         private static function removeLinebreak($message)
 529         {
 530                 $arrbody = explode("\n", trim($message));
 531
 532                 $lines = [];
 533                 $lineno = 0;
 534
 535                 foreach ($arrbody as $i => $line) {
 536                         $currquotelevel = 0;
 537                         $currline = $line;
 538                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 539                                 || (substr($currline, 0, 1) == ' '))) {
 540                                 if (substr($currline, 0, 1) == '>') {
 541                                         $currquotelevel++;
 542                                 }
 543
 544                                 $currline = ltrim(substr($currline, 1));
 545                         }
 546
 547                         $quotelevel = 0;
 548                         $nextline = trim($arrbody[$i+1]);
 549                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 550                                 || (substr($nextline, 0, 1) == ' '))) {
 551                                 if (substr($nextline, 0, 1) == '>') {
 552                                         $quotelevel++;
 553                                 }
 554
 555                                 $nextline = ltrim(substr($nextline, 1));
 556                         }
 557
 558                         $firstword = strpos($nextline.' ', ' ');
 559
 560                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 561                                         (substr(trim($nextline), 0, 1) == '=') ||
 562                                         (substr(trim($nextline), 0, 1) == '*') ||
 563                                         (substr(trim($nextline), 0, 1) == '·') ||
 564                                         (substr(trim($nextline), 0, 4) == '[url') ||
 565                                         (substr(trim($nextline), 0, 5) == '[size') ||
 566                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 567                                         (substr(trim($nextline), 0, 8) == 'https://'));
 568
 569                         if (!$specialchars) {
 570                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 571                                                 (substr(rtrim($line), -1) == '=') ||
 572                                                 (substr(rtrim($line), -1) == '*') ||
 573                                                 (substr(rtrim($line), -1) == '·') ||
 574                                                 (substr(rtrim($line), -6) == '[/url]') ||
 575                                                 (substr(rtrim($line), -7) == '[/size]'));
 576                         }
 577
 578                         if ($lines[$lineno] != '') {
 579                                 if (substr($lines[$lineno], -1) != ' ') {
 580                                         $lines[$lineno] .= ' ';
 581                                 }
 582
 583                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 584                                         || (substr($line, 0, 1) == ' '))) {
 585
 586                                         $line = ltrim(substr($line, 1));
 587                                 }
 588                         }
 589
 590                         $lines[$lineno] .= $line;
 591                         if (((substr($line, -1, 1) != ' '))
 592                                 || ($quotelevel != $currquotelevel)) {
 593                                 $lineno++;
 594                                 }
 595                 }
 596                 return implode("\n", $lines);
 597         }
 598
 599         private static function convertQuote($body, $reply)
 600         {
 601                 // Convert Quotes
 602                 $arrbody = explode("\n", trim($body));
 603                 $arrlevel = [];
 604
 605                 for ($i = 0; $i < count($arrbody); $i++) {
 606                         $quotelevel = 0;
 607                         $quoteline = $arrbody[$i];
 608
 609                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 610                                 || (substr($quoteline, 0, 1) == ' '))) {
 611                                 if (substr($quoteline, 0, 1) == '>')
 612                                         $quotelevel++;
 613
 614                                 $quoteline = ltrim(substr($quoteline, 1));
 615                         }
 616
 617                         $arrlevel[$i] = $quotelevel;
 618                         $arrbody[$i] = $quoteline;
 619                 }
 620
 621                 $quotelevel = 0;
 622                 $previousquote = 0;
 623                 $arrbodyquoted = [];
 624
 625                 for ($i = 0; $i < count($arrbody); $i++) {
 626                         $previousquote = $quotelevel;
 627                         $quotelevel = $arrlevel[$i];
 628                         $currline = $arrbody[$i];
 629
 630                         while ($previousquote < $quotelevel) {
 631                                 $quote = "[quote]";
 632                                 $arrbody[$i] = $quote.$arrbody[$i];
 633                                 $previousquote++;
 634                         }
 635
 636                         while ($previousquote > $quotelevel) {
 637                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 638                                 $previousquote--;
 639                         }
 640
 641                         $arrbodyquoted[] = $arrbody[$i];
 642                 }
 643                 while ($quotelevel > 0) {
 644                         $arrbodyquoted[] = '[/quote]';
 645                         $quotelevel--;
 646                 }
 647
 648                 $body = implode("\n", $arrbodyquoted);
 649
 650                 if (strlen($body) > 0) {
 651                         $body = $body."\n\n";
 652                 }
 653
 654                 if ($reply) {
 655                         $body = self::removeToFu($body);
 656                 }
 657
 658                 return $body;
 659         }
 660
 661         private static function removeToFu($message)
 662         {
 663                 $message = trim($message);
 664
 665                 do {
 666                         $oldmessage = $message;
 667                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 668                         $message = str_replace("[/quote][quote]", "", $message);
 669                 } while ($message != $oldmessage);
 670
 671                 $quotes = [];
 672
 673                 $startquotes = 0;
 674
 675                 $start = 0;
 676
 677                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 678                         $quotes[$pos] = -1;
 679                         $start = $pos + 7;
 680                         $startquotes++;
 681                 }
 682
 683                 $endquotes = 0;
 684                 $start = 0;
 685
 686                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 687                         $start = $pos + 7;
 688                         $endquotes++;
 689                 }
 690
 691                 while ($endquotes < $startquotes) {
 692                         $message .= '[/quote]';
 693                         ++$endquotes;
 694                 }
 695
 696                 $start = 0;
 697
 698                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 699                         $quotes[$pos] = 1;
 700                         $start = $pos + 7;
 701                 }
 702
 703                 if (strtolower(substr($message, -8)) != '[/quote]')
 704                         return($message);
 705
 706                 krsort($quotes);
 707
 708                 $quotelevel = 0;
 709                 $quotestart = 0;
 710                 foreach ($quotes as $index => $quote) {
 711                         $quotelevel += $quote;
 712
 713                         if (($quotelevel == 0) and ($quotestart == 0))
 714                                 $quotestart = $index;
 715                 }
 716
 717                 if ($quotestart != 0) {
 718                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 719                 }
 720
 721                 return $message;
 722         }
 723 }