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
   9 require_once 'include/html2plain.php';
  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                 return $mbox;
  31         }
  32
  33         /**
  34          * @param object $mbox       mailbox
  35          * @param string $email_addr email
  36          * @return array
  37          */
  38         public static function poll($mbox, $email_addr)
  39         {
  40                 if (!$mbox || !$email_addr) {
  41                         return [];
  42                 }
  43
  44                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  45                 if (!$search1) {
  46                         $search1 = [];
  47                 } else {
  48                         logger("Found mails from ".$email_addr, LOGGER_DEBUG);
  49                 }
  50
  51                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  52                 if (!$search2) {
  53                         $search2 = [];
  54                 } else {
  55                         logger("Found mails to ".$email_addr, LOGGER_DEBUG);
  56                 }
  57
  58                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  59                 if (!$search3) {
  60                         $search3 = [];
  61                 } else {
  62                         logger("Found mails cc ".$email_addr, LOGGER_DEBUG);
  63                 }
  64
  65                 $res = array_unique(array_merge($search1, $search2, $search3));
  66
  67                 return $res;
  68         }
  69
  70         /**
  71          * @param array   $mailacct mail account
  72          * @return string
  73          */
  74         public static function constructMailboxName($mailacct)
  75         {
  76                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  77                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  78                 $ret .= '}' . $mailacct['mailbox'];
  79                 return $ret;
  80         }
  81
  82         /**
  83          * @param object  $mbox mailbox
  84          * @param integer $uid  user id
  85          * @return mixed
  86          */
  87         public static function messageMeta($mbox, $uid)
  88         {
  89                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : [[]]); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
  90                 return (count($ret)) ? $ret : [];
  91         }
  92
  93         /**
  94          * @param object  $mbox  mailbox
  95          * @param integer $uid   user id
  96          * @param string  $reply reply
  97          * @return array
  98          */
  99         public static function getMessage($mbox, $uid, $reply)
 100         {
 101                 $ret = [];
 102
 103                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 104
 105                 if (!$struc) {
 106                         return $ret;
 107                 }
 108
 109                 if (!$struc->parts) {
 110                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 111                         $html = $ret['body'];
 112
 113                         if (trim($ret['body']) == '') {
 114                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 115                         } else {
 116                                 $ret['body'] = HTML::toBBCode($ret['body']);
 117                         }
 118                 } else {
 119                         $text = '';
 120                         $html = '';
 121                         foreach ($struc->parts as $ptop => $p) {
 122                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 123                                 if ($x) {
 124                                         $text .= $x;
 125                                 }
 126
 127                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 128                                 if ($x) {
 129                                         $html .= $x;
 130                                 }
 131                         }
 132                         if (trim($html) != '') {
 133                                 $ret['body'] = HTML::toBBCode($html);
 134                         } else {
 135                                 $ret['body'] = $text;
 136                         }
 137                 }
 138
 139                 $ret['body'] = self::removeGPG($ret['body']);
 140                 $msg = self::removeSig($ret['body']);
 141                 $ret['body'] = $msg['body'];
 142                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 143
 144                 if (trim($html) != '') {
 145                         $ret['body'] = self::removeLinebreak($ret['body']);
 146                 }
 147
 148                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 149
 150                 return $ret;
 151         }
 152
 153         // At the moment - only return plain/text.
 154         // Later we'll repackage inline images as data url's and make the HTML safe
 155         /**
 156          * @param object  $mbox    mailbox
 157          * @param integer $uid     user id
 158          * @param object  $p       parts
 159          * @param integer $partno  part number
 160          * @param string  $subtype sub type
 161          * @return string
 162          */
 163         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 164         {
 165                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 166                 global $htmlmsg,$plainmsg,$charset,$attachments;
 167
 168                 //echo $partno."\n";
 169
 170                 // DECODE DATA
 171                 $data = ($partno)
 172                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 173                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 174
 175                 // Any part may be encoded, even plain text messages, so check everything.
 176                 if ($p->encoding == 4) {
 177                         $data = quoted_printable_decode($data);
 178                 } elseif ($p->encoding == 3) {
 179                         $data = base64_decode($data);
 180                 }
 181
 182                 // PARAMETERS
 183                 // get all parameters, like charset, filenames of attachments, etc.
 184                 $params = [];
 185                 if ($p->parameters) {
 186                         foreach ($p->parameters as $x) {
 187                                 $params[strtolower($x->attribute)] = $x->value;
 188                         }
 189                 }
 190
 191                 if (isset($p->dparameters) && $p->dparameters) {
 192                         foreach ($p->dparameters as $x) {
 193                                 $params[strtolower($x->attribute)] = $x->value;
 194                         }
 195                 }
 196
 197                 // ATTACHMENT
 198                 // Any part with a filename is an attachment,
 199                 // so an attached text file (type 0) is not mistaken as the message.
 200
 201                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 202                         // filename may be given as 'Filename' or 'Name' or both
 203                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 204                         // filename may be encoded, so see imap_mime_header_decode()
 205                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 206                 }
 207
 208                 // TEXT
 209                 if ($p->type == 0 && $data) {
 210                         // Messages may be split in different parts because of inline attachments,
 211                         // so append parts together with blank row.
 212                         if (strtolower($p->subtype)==$subtype) {
 213                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 214                                 return (trim($data) ."\n\n");
 215                         } else {
 216                                 $data = '';
 217                         }
 218
 219                         // $htmlmsg .= $data ."<br><br>";
 220                         $charset = $params['charset'];  // assume all parts are same charset
 221                 }
 222
 223                 // EMBEDDED MESSAGE
 224                 // Many bounce notifications embed the original message as type 2,
 225                 // but AOL uses type 1 (multipart), which is not handled here.
 226                 // There are no PHP functions to parse embedded messages,
 227                 // so this just appends the raw source to the main message.
 228                 //      elseif ($p->type==2 && $data) {
 229                 //              $plainmsg .= $data."\n\n";
 230                 //      }
 231
 232                 // SUBPART RECURSION
 233                 if (isset($p->parts) && $p->parts) {
 234                         $x = "";
 235                         foreach ($p->parts as $partno0 => $p2) {
 236                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 237                                 //if ($x) {
 238                                 //      return $x;
 239                                 //}
 240                         }
 241                         return $x;
 242                 }
 243         }
 244
 245         /**
 246          * @param string $in_str  in string
 247          * @param string $charset character set
 248          * @return string
 249          */
 250         public static function encodeHeader($in_str, $charset)
 251         {
 252                 $out_str = $in_str;
 253                 $need_to_convert = false;
 254
 255                 for ($x = 0; $x < strlen($in_str); $x ++) {
 256                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 257                                 $need_to_convert = true;
 258                         }
 259                 }
 260
 261                 if (!$need_to_convert) {
 262                         return $in_str;
 263                 }
 264
 265                 if ($out_str && $charset) {
 266                         // define start delimimter, end delimiter and spacer
 267                         $end = "?=";
 268                         $start = "=?" . $charset . "?B?";
 269                         $spacer = $end . "\r\n " . $start;
 270
 271                         // determine length of encoded text within chunks
 272                         // and ensure length is even
 273                         $length = 75 - strlen($start) - strlen($end);
 274
 275                         /*
 276                                 [EDIT BY danbrown AT php DOT net: The following
 277                                 is a bugfix provided by (gardan AT gmx DOT de)
 278                                 on 31-MAR-2005 with the following note:
 279                                 "This means: $length should not be even,
 280                                 but divisible by 4. The reason is that in
 281                                 base64-encoding 3 8-bit-chars are represented
 282                                 by 4 6-bit-chars. These 4 chars must not be
 283                                 split between two encoded words, according
 284                                 to RFC-2047.
 285                         */
 286                         $length = $length - ($length % 4);
 287
 288                         // encode the string and split it into chunks
 289                         // with spacers after each chunk
 290                         $out_str = base64_encode($out_str);
 291                         $out_str = chunk_split($out_str, $length, $spacer);
 292
 293                         // remove trailing spacer and
 294                         // add start and end delimiters
 295                         $spacer = preg_quote($spacer, '/');
 296                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 297                         $out_str = $start . $out_str . $end;
 298                 }
 299                 return $out_str;
 300         }
 301
 302         /**
 303          * Function send is used by NETWORK_EMAIL and NETWORK_EMAIL2 code
 304          * (not to notify the user, but to send items to email contacts)
 305          *
 306          * @param string $addr    address
 307          * @param string $subject subject
 308          * @param string $headers headers
 309          * @param array  $item    item
 310          *
 311          * @return void
 312          *
 313          * @todo This could be changed to use the Emailer class
 314          */
 315         public static function send($addr, $subject, $headers, $item)
 316         {
 317                 //$headers .= 'MIME-Version: 1.0' . "\n";
 318                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 319                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 320                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 321
 322                 $part = uniqid("", true);
 323
 324                 $html    = prepare_body($item);
 325
 326                 $headers .= "Mime-Version: 1.0\n";
 327                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 328
 329                 $body = "\n--=_".$part."\n";
 330                 $body .= "Content-Transfer-Encoding: 8bit\n";
 331                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 332
 333                 $body .= Friendica\Content\Text\HTML::toPlaintext($html)."\n";
 334
 335                 $body .= "--=_".$part."\n";
 336                 $body .= "Content-Transfer-Encoding: 8bit\n";
 337                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 338
 339                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 340
 341                 $body .= "--=_".$part."--";
 342
 343                 //$message = '<html><body>' . $html . '</body></html>';
 344                 //$message = html2plain($html);
 345                 logger('notifier: email delivery to ' . $addr);
 346                 mail($addr, $subject, $body, $headers);
 347         }
 348
 349         /**
 350          * @param string $iri string
 351          * @return string
 352          */
 353         public static function iri2msgid($iri)
 354         {
 355                 if (!strpos($iri, "@")) {
 356                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 357                 } else {
 358                         $msgid = $iri;
 359                 }
 360
 361                 return $msgid;
 362         }
 363
 364         /**
 365          * @param string $msgid msgid
 366          * @return string
 367          */
 368         public static function msgid2iri($msgid)
 369         {
 370                 if (strpos($msgid, "@")) {
 371                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 372                 } else {
 373                         $iri = $msgid;
 374                 }
 375
 376                 return $iri;
 377         }
 378
 379         private static function saveReplace($pattern, $replace, $text)
 380         {
 381                 $save = $text;
 382
 383                 $text = preg_replace($pattern, $replace, $text);
 384
 385                 if ($text == '') {
 386                         $text = $save;
 387                 }
 388                 return $text;
 389         }
 390
 391         private static function unifyAttributionLine($message)
 392         {
 393                 $quotestr = ['quote', 'spoiler'];
 394                 foreach ($quotestr as $quote) {
 395                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 396                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 397
 398                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 399                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 400                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 401
 402                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 403                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 404
 405                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 406
 407                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 408
 409                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 410                         $message = self::saveReplace('/Am (.*?) schrieb <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 411                         $message = self::saveReplace('/Am (.*?) schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 412                         $message = self::saveReplace('/Am (.*?) schrieb (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 413
 414                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 415
 416                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 417
 418                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 419                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 420                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 421                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 422                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 423
 424                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 425                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 426
 427                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 428
 429                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 430
 431                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 432                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 433
 434                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 435
 436                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 437                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 438
 439                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 440
 441                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 442                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 443                         $message = self::saveReplace('/(.*?) schrieb am (.*?) um (.*):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 444                         $message = self::saveReplace('/(.*?) \((.*?)\) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 445                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 446
 447                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 448                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 449                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 450
 451                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 452                         $message = self::saveReplace('/(.*?) wrote \(.*?\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 453                         $message = self::saveReplace('/(.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 454
 455                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 456
 457                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 458                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) (.*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 459                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 460                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 461
 462                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 463                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 464                 }
 465                 return $message;
 466         }
 467
 468         private static function removeGPG($message)
 469         {
 470                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 471                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 472                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 473
 474                 preg_match($pattern, $message, $result);
 475
 476                 $cleaned = trim($result[1].$result[2].$result[3]);
 477
 478                 $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 479
 480                 if ($cleaned == '') {
 481                         $cleaned = $message;
 482                 }
 483
 484                 return $cleaned;
 485         }
 486
 487         private static function removeSig($message)
 488         {
 489                 $sigpos = strrpos($message, "\n-- \n");
 490                 $quotepos = strrpos($message, "[/quote]");
 491
 492                 if ($sigpos == 0) {
 493                         // Especially for web.de who are using that as a separator
 494                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 495                         $sigpos = strrpos($message, "\n-- \n");
 496                         $quotepos = strrpos($message, "[/quote]");
 497                 }
 498
 499                 // When the signature separator is inside a quote, we don't separate
 500                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 501                         return ['body' => $message, 'sig' => ''];
 502                 }
 503
 504                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 505
 506                 preg_match($pattern, $message, $result);
 507
 508                 if (($result[1] != '') && ($result[2] != '')) {
 509                         $cleaned = trim($result[1])."\n";
 510                         $sig = trim($result[2]);
 511                 } else {
 512                         $cleaned = $message;
 513                         $sig = '';
 514                 }
 515
 516                 return ['body' => $cleaned, 'sig' => $sig];
 517         }
 518
 519         private static function removeLinebreak($message)
 520         {
 521                 $arrbody = explode("\n", trim($message));
 522
 523                 $lines = [];
 524                 $lineno = 0;
 525
 526                 foreach ($arrbody as $i => $line) {
 527                         $currquotelevel = 0;
 528                         $currline = $line;
 529                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 530                                 || (substr($currline, 0, 1) == ' '))) {
 531                                 if (substr($currline, 0, 1) == '>') {
 532                                         $currquotelevel++;
 533                                 }
 534
 535                                 $currline = ltrim(substr($currline, 1));
 536                         }
 537
 538                         $quotelevel = 0;
 539                         $nextline = trim($arrbody[$i+1]);
 540                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 541                                 || (substr($nextline, 0, 1) == ' '))) {
 542                                 if (substr($nextline, 0, 1) == '>') {
 543                                         $quotelevel++;
 544                                 }
 545
 546                                 $nextline = ltrim(substr($nextline, 1));
 547                         }
 548
 549                         $firstword = strpos($nextline.' ', ' ');
 550
 551                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 552                                         (substr(trim($nextline), 0, 1) == '=') ||
 553                                         (substr(trim($nextline), 0, 1) == '*') ||
 554                                         (substr(trim($nextline), 0, 1) == '·') ||
 555                                         (substr(trim($nextline), 0, 4) == '[url') ||
 556                                         (substr(trim($nextline), 0, 5) == '[size') ||
 557                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 558                                         (substr(trim($nextline), 0, 8) == 'https://'));
 559
 560                         if (!$specialchars) {
 561                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 562                                                 (substr(rtrim($line), -1) == '=') ||
 563                                                 (substr(rtrim($line), -1) == '*') ||
 564                                                 (substr(rtrim($line), -1) == '·') ||
 565                                                 (substr(rtrim($line), -6) == '[/url]') ||
 566                                                 (substr(rtrim($line), -7) == '[/size]'));
 567                         }
 568
 569                         if ($lines[$lineno] != '') {
 570                                 if (substr($lines[$lineno], -1) != ' ') {
 571                                         $lines[$lineno] .= ' ';
 572                                 }
 573
 574                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 575                                         || (substr($line, 0, 1) == ' '))) {
 576
 577                                         $line = ltrim(substr($line, 1));
 578                                 }
 579                         }
 580
 581                         $lines[$lineno] .= $line;
 582                         if (((substr($line, -1, 1) != ' '))
 583                                 || ($quotelevel != $currquotelevel)) {
 584                                 $lineno++;
 585                                 }
 586                 }
 587                 return implode("\n", $lines);
 588         }
 589
 590         private static function convertQuote($body, $reply)
 591         {
 592                 // Convert Quotes
 593                 $arrbody = explode("\n", trim($body));
 594                 $arrlevel = [];
 595
 596                 for ($i = 0; $i < count($arrbody); $i++) {
 597                         $quotelevel = 0;
 598                         $quoteline = $arrbody[$i];
 599
 600                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 601                                 || (substr($quoteline, 0, 1) == ' '))) {
 602                                 if (substr($quoteline, 0, 1) == '>')
 603                                         $quotelevel++;
 604
 605                                 $quoteline = ltrim(substr($quoteline, 1));
 606                         }
 607
 608                         $arrlevel[$i] = $quotelevel;
 609                         $arrbody[$i] = $quoteline;
 610                 }
 611
 612                 $quotelevel = 0;
 613                 $previousquote = 0;
 614                 $arrbodyquoted = [];
 615
 616                 for ($i = 0; $i < count($arrbody); $i++) {
 617                         $previousquote = $quotelevel;
 618                         $quotelevel = $arrlevel[$i];
 619                         $currline = $arrbody[$i];
 620
 621                         while ($previousquote < $quotelevel) {
 622                                 $quote = "[quote]";
 623                                 $arrbody[$i] = $quote.$arrbody[$i];
 624                                 $previousquote++;
 625                         }
 626
 627                         while ($previousquote > $quotelevel) {
 628                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 629                                 $previousquote--;
 630                         }
 631
 632                         $arrbodyquoted[] = $arrbody[$i];
 633                 }
 634                 while ($quotelevel > 0) {
 635                         $arrbodyquoted[] = '[/quote]';
 636                         $quotelevel--;
 637                 }
 638
 639                 $body = implode("\n", $arrbodyquoted);
 640
 641                 if (strlen($body) > 0) {
 642                         $body = $body."\n\n";
 643                 }
 644
 645                 if ($reply) {
 646                         $body = self::removeToFu($body);
 647                 }
 648
 649                 return $body;
 650         }
 651
 652         private static function removeToFu($message)
 653         {
 654                 $message = trim($message);
 655
 656                 do {
 657                         $oldmessage = $message;
 658                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 659                         $message = str_replace("[/quote][quote]", "", $message);
 660                 } while ($message != $oldmessage);
 661
 662                 $quotes = [];
 663
 664                 $startquotes = 0;
 665
 666                 $start = 0;
 667
 668                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 669                         $quotes[$pos] = -1;
 670                         $start = $pos + 7;
 671                         $startquotes++;
 672                 }
 673
 674                 $endquotes = 0;
 675                 $start = 0;
 676
 677                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 678                         $start = $pos + 7;
 679                         $endquotes++;
 680                 }
 681
 682                 while ($endquotes < $startquotes) {
 683                         $message .= '[/quote]';
 684                         ++$endquotes;
 685                 }
 686
 687                 $start = 0;
 688
 689                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 690                         $quotes[$pos] = 1;
 691                         $start = $pos + 7;
 692                 }
 693
 694                 if (strtolower(substr($message, -8)) != '[/quote]')
 695                         return($message);
 696
 697                 krsort($quotes);
 698
 699                 $quotelevel = 0;
 700                 $quotestart = 0;
 701                 foreach ($quotes as $index => $quote) {
 702                         $quotelevel += $quote;
 703
 704                         if (($quotelevel == 0) and ($quotestart == 0))
 705                                 $quotestart = $index;
 706                 }
 707
 708                 if ($quotestart != 0) {
 709                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 710                 }
 711
 712                 return $message;
 713         }
 714 }