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 /**
  10  * @brief Email class
  11  */
  12 class Email
  13 {
  14         /**
  15          * @param string $mailbox  The mailbox name
  16          * @param string $username The username
  17          * @param string $password The password
  18          * @return object
  19          */
  20         public static function connect($mailbox, $username, $password)
  21         {
  22                 if (!function_exists('imap_open')) {
  23                         return false;
  24                 }
  25
  26                 $mbox = @imap_open($mailbox, $username, $password);
  27
  28                 $errors = imap_errors();
  29                 if (!empty($errors)) {
  30                         logger('IMAP Errors occured: ' . json_encode($errors));
  31                 }
  32
  33                 $alerts = imap_alerts();
  34                 if (!empty($alerts)) {
  35                         logger('IMAP Alerts occured: ' . json_encode($alerts));
  36                 }
  37
  38                 return $mbox;
  39         }
  40
  41         /**
  42          * @param object $mbox       mailbox
  43          * @param string $email_addr email
  44          * @return array
  45          */
  46         public static function poll($mbox, $email_addr)
  47         {
  48                 if (!$mbox || !$email_addr) {
  49                         return [];
  50                 }
  51
  52                 $search1 = @imap_search($mbox, 'FROM "' . $email_addr . '"', SE_UID);
  53                 if (!$search1) {
  54                         $search1 = [];
  55                 } else {
  56                         logger("Found mails from ".$email_addr, LOGGER_DEBUG);
  57                 }
  58
  59                 $search2 = @imap_search($mbox, 'TO "' . $email_addr . '"', SE_UID);
  60                 if (!$search2) {
  61                         $search2 = [];
  62                 } else {
  63                         logger("Found mails to ".$email_addr, LOGGER_DEBUG);
  64                 }
  65
  66                 $search3 = @imap_search($mbox, 'CC "' . $email_addr . '"', SE_UID);
  67                 if (!$search3) {
  68                         $search3 = [];
  69                 } else {
  70                         logger("Found mails cc ".$email_addr, LOGGER_DEBUG);
  71                 }
  72
  73                 $res = array_unique(array_merge($search1, $search2, $search3));
  74
  75                 return $res;
  76         }
  77
  78         /**
  79          * @param array   $mailacct mail account
  80          * @return string
  81          */
  82         public static function constructMailboxName($mailacct)
  83         {
  84                 $ret = '{' . $mailacct['server'] . ((intval($mailacct['port'])) ? ':' . $mailacct['port'] : '');
  85                 $ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
  86                 $ret .= '}' . $mailacct['mailbox'];
  87                 return $ret;
  88         }
  89
  90         /**
  91          * @param object  $mbox mailbox
  92          * @param integer $uid  user id
  93          * @return mixed
  94          */
  95         public static function messageMeta($mbox, $uid)
  96         {
  97                 $ret = (($mbox && $uid) ? @imap_fetch_overview($mbox, $uid, FT_UID) : [[]]); // POSSIBLE CLEANUP --> array(array()) is probably redundant now
  98                 return (count($ret)) ? $ret : [];
  99         }
 100
 101         /**
 102          * @param object  $mbox  mailbox
 103          * @param integer $uid   user id
 104          * @param string  $reply reply
 105          * @return array
 106          */
 107         public static function getMessage($mbox, $uid, $reply)
 108         {
 109                 $ret = [];
 110
 111                 $struc = (($mbox && $uid) ? @imap_fetchstructure($mbox, $uid, FT_UID) : null);
 112
 113                 if (!$struc) {
 114                         return $ret;
 115                 }
 116
 117                 if (!$struc->parts) {
 118                         $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'html');
 119                         $html = $ret['body'];
 120
 121                         if (trim($ret['body']) == '') {
 122                                 $ret['body'] = self::messageGetPart($mbox, $uid, $struc, 0, 'plain');
 123                         } else {
 124                                 $ret['body'] = HTML::toBBCode($ret['body']);
 125                         }
 126                 } else {
 127                         $text = '';
 128                         $html = '';
 129                         foreach ($struc->parts as $ptop => $p) {
 130                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'plain');
 131                                 if ($x) {
 132                                         $text .= $x;
 133                                 }
 134
 135                                 $x = self::messageGetPart($mbox, $uid, $p, $ptop + 1, 'html');
 136                                 if ($x) {
 137                                         $html .= $x;
 138                                 }
 139                         }
 140                         if (trim($html) != '') {
 141                                 $ret['body'] = HTML::toBBCode($html);
 142                         } else {
 143                                 $ret['body'] = $text;
 144                         }
 145                 }
 146
 147                 $ret['body'] = self::removeGPG($ret['body']);
 148                 $msg = self::removeSig($ret['body']);
 149                 $ret['body'] = $msg['body'];
 150                 $ret['body'] = self::convertQuote($ret['body'], $reply);
 151
 152                 if (trim($html) != '') {
 153                         $ret['body'] = self::removeLinebreak($ret['body']);
 154                 }
 155
 156                 $ret['body'] = self::unifyAttributionLine($ret['body']);
 157
 158                 return $ret;
 159         }
 160
 161         // At the moment - only return plain/text.
 162         // Later we'll repackage inline images as data url's and make the HTML safe
 163         /**
 164          * @param object  $mbox    mailbox
 165          * @param integer $uid     user id
 166          * @param object  $p       parts
 167          * @param integer $partno  part number
 168          * @param string  $subtype sub type
 169          * @return string
 170          */
 171         private static function messageGetPart($mbox, $uid, $p, $partno, $subtype)
 172         {
 173                 // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
 174                 global $htmlmsg,$plainmsg,$charset,$attachments;
 175
 176                 //echo $partno."\n";
 177
 178                 // DECODE DATA
 179                 $data = ($partno)
 180                         ? @imap_fetchbody($mbox, $uid, $partno, FT_UID|FT_PEEK)
 181                 : @imap_body($mbox, $uid, FT_UID|FT_PEEK);
 182
 183                 // Any part may be encoded, even plain text messages, so check everything.
 184                 if ($p->encoding == 4) {
 185                         $data = quoted_printable_decode($data);
 186                 } elseif ($p->encoding == 3) {
 187                         $data = base64_decode($data);
 188                 }
 189
 190                 // PARAMETERS
 191                 // get all parameters, like charset, filenames of attachments, etc.
 192                 $params = [];
 193                 if ($p->parameters) {
 194                         foreach ($p->parameters as $x) {
 195                                 $params[strtolower($x->attribute)] = $x->value;
 196                         }
 197                 }
 198
 199                 if (isset($p->dparameters) && $p->dparameters) {
 200                         foreach ($p->dparameters as $x) {
 201                                 $params[strtolower($x->attribute)] = $x->value;
 202                         }
 203                 }
 204
 205                 // ATTACHMENT
 206                 // Any part with a filename is an attachment,
 207                 // so an attached text file (type 0) is not mistaken as the message.
 208
 209                 if ((isset($params['filename']) && $params['filename']) || (isset($params['name']) && $params['name'])) {
 210                         // filename may be given as 'Filename' or 'Name' or both
 211                         $filename = ($params['filename'])? $params['filename'] : $params['name'];
 212                         // filename may be encoded, so see imap_mime_header_decode()
 213                         $attachments[$filename] = $data;  // this is a problem if two files have same name
 214                 }
 215
 216                 // TEXT
 217                 if ($p->type == 0 && $data) {
 218                         // Messages may be split in different parts because of inline attachments,
 219                         // so append parts together with blank row.
 220                         if (strtolower($p->subtype)==$subtype) {
 221                                 $data = iconv($params['charset'], 'UTF-8//IGNORE', $data);
 222                                 return (trim($data) ."\n\n");
 223                         } else {
 224                                 $data = '';
 225                         }
 226
 227                         // $htmlmsg .= $data ."<br><br>";
 228                         $charset = $params['charset'];  // assume all parts are same charset
 229                 }
 230
 231                 // EMBEDDED MESSAGE
 232                 // Many bounce notifications embed the original message as type 2,
 233                 // but AOL uses type 1 (multipart), which is not handled here.
 234                 // There are no PHP functions to parse embedded messages,
 235                 // so this just appends the raw source to the main message.
 236                 //      elseif ($p->type==2 && $data) {
 237                 //              $plainmsg .= $data."\n\n";
 238                 //      }
 239
 240                 // SUBPART RECURSION
 241                 if (isset($p->parts) && $p->parts) {
 242                         $x = "";
 243                         foreach ($p->parts as $partno0 => $p2) {
 244                                 $x .=  self::messageGetPart($mbox, $uid, $p2, $partno . '.' . ($partno0+1), $subtype);  // 1.2, 1.2.1, etc.
 245                                 //if ($x) {
 246                                 //      return $x;
 247                                 //}
 248                         }
 249                         return $x;
 250                 }
 251         }
 252
 253         /**
 254          * @param string $in_str  in string
 255          * @param string $charset character set
 256          * @return string
 257          */
 258         public static function encodeHeader($in_str, $charset)
 259         {
 260                 $out_str = $in_str;
 261                 $need_to_convert = false;
 262
 263                 for ($x = 0; $x < strlen($in_str); $x ++) {
 264                         if ((ord($in_str[$x]) == 0) || ((ord($in_str[$x]) > 128))) {
 265                                 $need_to_convert = true;
 266                         }
 267                 }
 268
 269                 if (!$need_to_convert) {
 270                         return $in_str;
 271                 }
 272
 273                 if ($out_str && $charset) {
 274                         // define start delimimter, end delimiter and spacer
 275                         $end = "?=";
 276                         $start = "=?" . $charset . "?B?";
 277                         $spacer = $end . "\r\n " . $start;
 278
 279                         // determine length of encoded text within chunks
 280                         // and ensure length is even
 281                         $length = 75 - strlen($start) - strlen($end);
 282
 283                         /*
 284                                 [EDIT BY danbrown AT php DOT net: The following
 285                                 is a bugfix provided by (gardan AT gmx DOT de)
 286                                 on 31-MAR-2005 with the following note:
 287                                 "This means: $length should not be even,
 288                                 but divisible by 4. The reason is that in
 289                                 base64-encoding 3 8-bit-chars are represented
 290                                 by 4 6-bit-chars. These 4 chars must not be
 291                                 split between two encoded words, according
 292                                 to RFC-2047.
 293                         */
 294                         $length = $length - ($length % 4);
 295
 296                         // encode the string and split it into chunks
 297                         // with spacers after each chunk
 298                         $out_str = base64_encode($out_str);
 299                         $out_str = chunk_split($out_str, $length, $spacer);
 300
 301                         // remove trailing spacer and
 302                         // add start and end delimiters
 303                         $spacer = preg_quote($spacer, '/');
 304                         $out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
 305                         $out_str = $start . $out_str . $end;
 306                 }
 307                 return $out_str;
 308         }
 309
 310         /**
 311          * Function send is used by NETWORK_EMAIL and NETWORK_EMAIL2 code
 312          * (not to notify the user, but to send items to email contacts)
 313          *
 314          * @param string $addr    address
 315          * @param string $subject subject
 316          * @param string $headers headers
 317          * @param array  $item    item
 318          *
 319          * @return void
 320          *
 321          * @todo This could be changed to use the Emailer class
 322          */
 323         public static function send($addr, $subject, $headers, $item)
 324         {
 325                 //$headers .= 'MIME-Version: 1.0' . "\n";
 326                 //$headers .= 'Content-Type: text/html; charset=UTF-8' . "\n";
 327                 //$headers .= 'Content-Type: text/plain; charset=UTF-8' . "\n";
 328                 //$headers .= 'Content-Transfer-Encoding: 8bit' . "\n\n";
 329
 330                 $part = uniqid("", true);
 331
 332                 $html    = prepare_body($item);
 333
 334                 $headers .= "Mime-Version: 1.0\n";
 335                 $headers .= 'Content-Type: multipart/alternative; boundary="=_'.$part.'"'."\n\n";
 336
 337                 $body = "\n--=_".$part."\n";
 338                 $body .= "Content-Transfer-Encoding: 8bit\n";
 339                 $body .= "Content-Type: text/plain; charset=utf-8; format=flowed\n\n";
 340
 341                 $body .= HTML::toPlaintext($html)."\n";
 342
 343                 $body .= "--=_".$part."\n";
 344                 $body .= "Content-Transfer-Encoding: 8bit\n";
 345                 $body .= "Content-Type: text/html; charset=utf-8\n\n";
 346
 347                 $body .= '<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'.$html."</body></html>\n";
 348
 349                 $body .= "--=_".$part."--";
 350
 351                 //$message = '<html><body>' . $html . '</body></html>';
 352                 //$message = html2plain($html);
 353                 logger('notifier: email delivery to ' . $addr);
 354                 mail($addr, $subject, $body, $headers);
 355         }
 356
 357         /**
 358          * @param string $iri string
 359          * @return string
 360          */
 361         public static function iri2msgid($iri)
 362         {
 363                 if (!strpos($iri, "@")) {
 364                         $msgid = preg_replace("/urn:(\S+):(\S+)\.(\S+):(\d+):(\S+)/i", "urn!$1!$4!$5@$2.$3", $iri);
 365                 } else {
 366                         $msgid = $iri;
 367                 }
 368
 369                 return $msgid;
 370         }
 371
 372         /**
 373          * @param string $msgid msgid
 374          * @return string
 375          */
 376         public static function msgid2iri($msgid)
 377         {
 378                 if (strpos($msgid, "@")) {
 379                         $iri = preg_replace("/urn!(\S+)!(\d+)!(\S+)@(\S+)\.(\S+)/i", "urn:$1:$4.$5:$2:$3", $msgid);
 380                 } else {
 381                         $iri = $msgid;
 382                 }
 383
 384                 return $iri;
 385         }
 386
 387         private static function saveReplace($pattern, $replace, $text)
 388         {
 389                 $save = $text;
 390
 391                 $text = preg_replace($pattern, $replace, $text);
 392
 393                 if ($text == '') {
 394                         $text = $save;
 395                 }
 396                 return $text;
 397         }
 398
 399         private static function unifyAttributionLine($message)
 400         {
 401                 $quotestr = ['quote', 'spoiler'];
 402                 foreach ($quotestr as $quote) {
 403                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Cc: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 404                         $message = self::saveReplace('/----- Original Message -----\s.*?From: "([^<"].*?)" <(.*?)>\s.*?To: (.*?)\s*?Sent: (.*?)\s.*?Subject: ([^\n].*)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 405
 406                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?) <(.*?)>\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 407                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\sDatum: (.*?)\s.*Von: "([^<"].*?)" <(.*?)>\s.*An: (.*?)\n.*/i', "[".$quote."='$2']\n", $message);
 408                         $message = self::saveReplace('/-------- Original-Nachricht --------\s*\['.$quote.'\]\nDatum: (.*?)\nVon: (.*?)\nAn: (.*?)\nBetreff: (.*?)\n/i', "[".$quote."='$2']\n", $message);
 409
 410                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?).*:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 411                         $message = self::saveReplace('/-----Urspr.*?ngliche Nachricht-----\sVon: "([^<"].*?)" <(.*?)>\s.*Gesendet: (.*?)\s.*An: (.*?)\s.*Betreff: ([^\n].*?)\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 412
 413                         $message = self::saveReplace('/Am (.*?), schrieb (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 414
 415                         $message = self::saveReplace('/Am .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\sschrieb\s(.*?)\s<(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 416
 417                         $message = self::saveReplace('/Am (.*?) schrieb (.*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 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 (.*?)\n(.*?):\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 421
 422                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 423
 424                         $message = self::saveReplace('/On .*?, \d+ .*? \d+ \d+:\d+:\d+ \+\d+\s(.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 425
 426                         $message = self::saveReplace('/On (.*?) at (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 427                         $message = self::saveReplace('/On (.*?)\n([^<].*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 428                         $message = self::saveReplace('/On (.*?), (.*?), (.*?)\s<(.*?)>\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$3']\n", $message);
 429                         $message = self::saveReplace('/On ([^,].*?), (.*?)\swrote:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 430                         $message = self::saveReplace('/On (.*?), (.*?)\swrote\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 431
 432                         // Der loescht manchmal den Body - was eigentlich unmoeglich ist
 433                         $message = self::saveReplace('/On (.*?),(.*?),(.*?),(.*?), (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$5']\n", $message);
 434
 435                         $message = self::saveReplace('/Zitat von ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 436
 437                         $message = self::saveReplace('/Quoting ([^<].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 438
 439                         $message = self::saveReplace('/From: "([^<"].*?)" <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 440                         $message = self::saveReplace('/From: <(.*?)>\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 441
 442                         $message = self::saveReplace('/Du \(([^)].*?)\) schreibst:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 443
 444                         $message = self::saveReplace('/--- (.*?) <.*?> schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 445                         $message = self::saveReplace('/--- (.*?) schrieb am (.*?):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 446
 447                         $message = self::saveReplace('/\* (.*?) <(.*?)> hat geschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 448
 449                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb (.*?)\):\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 450                         $message = self::saveReplace('/(.*?) <(.*?)> schrieb am (.*?) um (.*):\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:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 453                         $message = self::saveReplace('/(.*?) schrieb:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 454
 455                         $message = self::saveReplace('/(.*?) <(.*?)> writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 456                         $message = self::saveReplace('/(.*?) \((.*?)\) writes:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 457                         $message = self::saveReplace('/(.*?) writes:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 458
 459                         $message = self::saveReplace('/\* (.*?) wrote:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 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
 463                         $message = self::saveReplace('/([^<].*?) <.*?> hat am (.*?)\sum\s(.*)\sgeschrieben:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 464
 465                         $message = self::saveReplace('/(\d+)\/(\d+)\/(\d+) ([^<"].*?) <(.*?)>:\s*\['.$quote.'\]/i', "[".$quote."='$4']\n", $message);
 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
 470                         $message = self::saveReplace('/(.*?) <(.*?)> schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$1']\n", $message);
 471                         $message = self::saveReplace('/(.*?) \((.*?)\) schrubselte:\s*\['.$quote.'\]/i', "[".$quote."='$2']\n", $message);
 472                 }
 473                 return $message;
 474         }
 475
 476         private static function removeGPG($message)
 477         {
 478                 $pattern = '/(.*)\s*-----BEGIN PGP SIGNED MESSAGE-----\s*[\r\n].*Hash:.*?[\r\n](.*)'.
 479                         '[\r\n]\s*-----BEGIN PGP SIGNATURE-----\s*[\r\n].*'.
 480                         '[\r\n]\s*-----END PGP SIGNATURE-----(.*)/is';
 481
 482                 preg_match($pattern, $message, $result);
 483
 484                 $cleaned = trim($result[1].$result[2].$result[3]);
 485
 486                 $cleaned = str_replace(["\n- --\n", "\n- -"], ["\n-- \n", "\n-"], $cleaned);
 487
 488                 if ($cleaned == '') {
 489                         $cleaned = $message;
 490                 }
 491
 492                 return $cleaned;
 493         }
 494
 495         private static function removeSig($message)
 496         {
 497                 $sigpos = strrpos($message, "\n-- \n");
 498                 $quotepos = strrpos($message, "[/quote]");
 499
 500                 if ($sigpos == 0) {
 501                         // Especially for web.de who are using that as a separator
 502                         $message = str_replace("\n___________________________________________________________\n", "\n-- \n", $message);
 503                         $sigpos = strrpos($message, "\n-- \n");
 504                         $quotepos = strrpos($message, "[/quote]");
 505                 }
 506
 507                 // When the signature separator is inside a quote, we don't separate
 508                 if (($sigpos < $quotepos) && ($sigpos != 0)) {
 509                         return ['body' => $message, 'sig' => ''];
 510                 }
 511
 512                 $pattern = '/(.*)[\r\n]-- [\r\n](.*)/is';
 513
 514                 preg_match($pattern, $message, $result);
 515
 516                 if (($result[1] != '') && ($result[2] != '')) {
 517                         $cleaned = trim($result[1])."\n";
 518                         $sig = trim($result[2]);
 519                 } else {
 520                         $cleaned = $message;
 521                         $sig = '';
 522                 }
 523
 524                 return ['body' => $cleaned, 'sig' => $sig];
 525         }
 526
 527         private static function removeLinebreak($message)
 528         {
 529                 $arrbody = explode("\n", trim($message));
 530
 531                 $lines = [];
 532                 $lineno = 0;
 533
 534                 foreach ($arrbody as $i => $line) {
 535                         $currquotelevel = 0;
 536                         $currline = $line;
 537                         while ((strlen($currline)>0) && ((substr($currline, 0, 1) == '>')
 538                                 || (substr($currline, 0, 1) == ' '))) {
 539                                 if (substr($currline, 0, 1) == '>') {
 540                                         $currquotelevel++;
 541                                 }
 542
 543                                 $currline = ltrim(substr($currline, 1));
 544                         }
 545
 546                         $quotelevel = 0;
 547                         $nextline = trim($arrbody[$i+1]);
 548                         while ((strlen($nextline)>0) && ((substr($nextline, 0, 1) == '>')
 549                                 || (substr($nextline, 0, 1) == ' '))) {
 550                                 if (substr($nextline, 0, 1) == '>') {
 551                                         $quotelevel++;
 552                                 }
 553
 554                                 $nextline = ltrim(substr($nextline, 1));
 555                         }
 556
 557                         $firstword = strpos($nextline.' ', ' ');
 558
 559                         $specialchars = ((substr(trim($nextline), 0, 1) == '-') ||
 560                                         (substr(trim($nextline), 0, 1) == '=') ||
 561                                         (substr(trim($nextline), 0, 1) == '*') ||
 562                                         (substr(trim($nextline), 0, 1) == '·') ||
 563                                         (substr(trim($nextline), 0, 4) == '[url') ||
 564                                         (substr(trim($nextline), 0, 5) == '[size') ||
 565                                         (substr(trim($nextline), 0, 7) == 'http://') ||
 566                                         (substr(trim($nextline), 0, 8) == 'https://'));
 567
 568                         if (!$specialchars) {
 569                                 $specialchars = ((substr(rtrim($line), -1) == '-') ||
 570                                                 (substr(rtrim($line), -1) == '=') ||
 571                                                 (substr(rtrim($line), -1) == '*') ||
 572                                                 (substr(rtrim($line), -1) == '·') ||
 573                                                 (substr(rtrim($line), -6) == '[/url]') ||
 574                                                 (substr(rtrim($line), -7) == '[/size]'));
 575                         }
 576
 577                         if ($lines[$lineno] != '') {
 578                                 if (substr($lines[$lineno], -1) != ' ') {
 579                                         $lines[$lineno] .= ' ';
 580                                 }
 581
 582                                 while ((strlen($line)>0) && ((substr($line, 0, 1) == '>')
 583                                         || (substr($line, 0, 1) == ' '))) {
 584
 585                                         $line = ltrim(substr($line, 1));
 586                                 }
 587                         }
 588
 589                         $lines[$lineno] .= $line;
 590                         if (((substr($line, -1, 1) != ' '))
 591                                 || ($quotelevel != $currquotelevel)) {
 592                                 $lineno++;
 593                                 }
 594                 }
 595                 return implode("\n", $lines);
 596         }
 597
 598         private static function convertQuote($body, $reply)
 599         {
 600                 // Convert Quotes
 601                 $arrbody = explode("\n", trim($body));
 602                 $arrlevel = [];
 603
 604                 for ($i = 0; $i < count($arrbody); $i++) {
 605                         $quotelevel = 0;
 606                         $quoteline = $arrbody[$i];
 607
 608                         while ((strlen($quoteline)>0) and ((substr($quoteline, 0, 1) == '>')
 609                                 || (substr($quoteline, 0, 1) == ' '))) {
 610                                 if (substr($quoteline, 0, 1) == '>')
 611                                         $quotelevel++;
 612
 613                                 $quoteline = ltrim(substr($quoteline, 1));
 614                         }
 615
 616                         $arrlevel[$i] = $quotelevel;
 617                         $arrbody[$i] = $quoteline;
 618                 }
 619
 620                 $quotelevel = 0;
 621                 $previousquote = 0;
 622                 $arrbodyquoted = [];
 623
 624                 for ($i = 0; $i < count($arrbody); $i++) {
 625                         $previousquote = $quotelevel;
 626                         $quotelevel = $arrlevel[$i];
 627                         $currline = $arrbody[$i];
 628
 629                         while ($previousquote < $quotelevel) {
 630                                 $quote = "[quote]";
 631                                 $arrbody[$i] = $quote.$arrbody[$i];
 632                                 $previousquote++;
 633                         }
 634
 635                         while ($previousquote > $quotelevel) {
 636                                 $arrbody[$i] = '[/quote]'.$arrbody[$i];
 637                                 $previousquote--;
 638                         }
 639
 640                         $arrbodyquoted[] = $arrbody[$i];
 641                 }
 642                 while ($quotelevel > 0) {
 643                         $arrbodyquoted[] = '[/quote]';
 644                         $quotelevel--;
 645                 }
 646
 647                 $body = implode("\n", $arrbodyquoted);
 648
 649                 if (strlen($body) > 0) {
 650                         $body = $body."\n\n";
 651                 }
 652
 653                 if ($reply) {
 654                         $body = self::removeToFu($body);
 655                 }
 656
 657                 return $body;
 658         }
 659
 660         private static function removeToFu($message)
 661         {
 662                 $message = trim($message);
 663
 664                 do {
 665                         $oldmessage = $message;
 666                         $message = preg_replace('=\[/quote\][\s](.*?)\[quote\]=i', '$1', $message);
 667                         $message = str_replace("[/quote][quote]", "", $message);
 668                 } while ($message != $oldmessage);
 669
 670                 $quotes = [];
 671
 672                 $startquotes = 0;
 673
 674                 $start = 0;
 675
 676                 while (($pos = strpos($message, '[quote', $start)) > 0) {
 677                         $quotes[$pos] = -1;
 678                         $start = $pos + 7;
 679                         $startquotes++;
 680                 }
 681
 682                 $endquotes = 0;
 683                 $start = 0;
 684
 685                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 686                         $start = $pos + 7;
 687                         $endquotes++;
 688                 }
 689
 690                 while ($endquotes < $startquotes) {
 691                         $message .= '[/quote]';
 692                         ++$endquotes;
 693                 }
 694
 695                 $start = 0;
 696
 697                 while (($pos = strpos($message, '[/quote]', $start)) > 0) {
 698                         $quotes[$pos] = 1;
 699                         $start = $pos + 7;
 700                 }
 701
 702                 if (strtolower(substr($message, -8)) != '[/quote]')
 703                         return($message);
 704
 705                 krsort($quotes);
 706
 707                 $quotelevel = 0;
 708                 $quotestart = 0;
 709                 foreach ($quotes as $index => $quote) {
 710                         $quotelevel += $quote;
 711
 712                         if (($quotelevel == 0) and ($quotestart == 0))
 713                                 $quotestart = $index;
 714                 }
 715
 716                 if ($quotestart != 0) {
 717                         $message = trim(substr($message, 0, $quotestart))."\n[spoiler]".substr($message, $quotestart+7, -8).'[/spoiler]';
 718                 }
 719
 720                 return $message;
 721         }
 722 }