program/lib/imap.inc

   1 <?php
   2 /////////////////////////////////////////////////////////
   3 //
   4 //      Iloha IMAP Library (IIL)
   5 //
   6 //      (C)Copyright 2002 Ryo Chijiiwa <Ryo@IlohaMail.org>
   7 //
   8 //      This file is part of IlohaMail. IlohaMail is free software released
   9 //      under the GPL license.  See enclosed file COPYING for details, or
  10 //      see http://www.fsf.org/copyleft/gpl.html
  11 //
  12 /////////////////////////////////////////////////////////
  13
  14 /********************************************************
  15
  16         FILE: include/imap.inc
  17         PURPOSE:
  18                 Provide alternative IMAP library that doesn't rely on the standard
  19                 C-Client based version.  This allows IlohaMail to function regardless
  20                 of whether or not the PHP build it's running on has IMAP functionality
  21                 built-in.
  22         USEAGE:
  23                 Function containing "_C_" in name require connection handler to be
  24                 passed as one of the parameters.  To obtain connection handler, use
  25                 iil_Connect()
  26         VERSION:
  27                 IlohaMail-0.9-20050415
  28         CHANGES:
  29                 File altered by Thomas Bruederli <roundcube@gmail.com>
  30                 to fit enhanced equirements by the RoundCube Webmail:
  31                 - Added list of server capabilites and check these before invoking commands
  32                 - Added junk flag to iilBasicHeader
  33                 - Enhanced error reporting on fsockopen()
  34                 - Additional parameter for SORT command
  35                 - Removed Call-time pass-by-reference because deprecated
  36                 - Parse charset from content-type in iil_C_FetchHeaders()
  37                 - Enhanced heaer sorting
  38                 - Pass message as reference in iil_C_Append (to save memory)
  39                 - Added BCC and REFERENCE to the list of headers to fetch in iil_C_FetchHeaders()
  40                 - Leave messageID unchanged in iil_C_FetchHeaders()
  41                 - Avoid stripslahes in iil_Connect()
  42                 - Escape quotes and backslashes in iil_C_Login()
  43                 - Added patch to iil_SortHeaders() by Richard Green
  44                 - Removed <br> from error messages (better for logging)
  45                 - Added patch to iil_C_Sort() enabling UID SORT commands
  46                 - Added function iil_C_ID2UID()
  47                 - Casting date parts in iil_StrToTime() to avoid mktime() warnings
  48                 - Also acceppt LIST responses in iil_C_ListSubscribed()
  49                 - Sanity check of $message_set in iil_C_FetchHeaders(), iil_C_FetchHeaderIndex(), iil_C_FetchThreadHeaders()
  50                 - Implemented UID FETCH in iil_C_FetchHeaders()
  51                 - Removed some debuggers (echo ...)
  52
  53 ********************************************************/
  54
  55
  56 // changed path to work within roundcube webmail
  57 include_once("lib/icl_commons.inc");
  58
  59
  60 if (!$IMAP_USE_HEADER_DATE) $IMAP_USE_INTERNAL_DATE = true;
  61 $IMAP_MONTHS=array("Jan"=>1,"Feb"=>2,"Mar"=>3,"Apr"=>4,"May"=>5,"Jun"=>6,"Jul"=>7,"Aug"=>8,"Sep"=>9,"Oct"=>10,"Nov"=>11,"Dec"=>12);
  62 $IMAP_SERVER_TZ = date('Z');
  63
  64 $iil_error;
  65 $iil_errornum;
  66 $iil_selected;
  67
  68 class iilConnection{
  69         var $fp;
  70         var $error;
  71         var $errorNum;
  72         var $selected;
  73         var $message;
  74         var $host;
  75         var $cache;
  76         var $uid_cache;
  77         var $do_cache;
  78         var $exists;
  79         var $recent;
  80         var $rootdir;
  81         var $delimiter;
  82         var $capability = array();
  83 }
  84
  85 class iilBasicHeader{
  86         var $id;
  87         var $uid;
  88         var $subject;
  89         var $from;
  90         var $to;
  91         var $cc;
  92         var $replyto;
  93         var $in_reply_to;
  94         var $date;
  95         var $messageID;
  96         var $size;
  97         var $encoding;
  98         var $ctype;
  99         var $flags;
 100         var $timestamp;
 101         var $f;
 102         var $seen;
 103         var $deleted;
 104         var $recent;
 105         var $answered;
 106         var $junk;
 107         var $internaldate;
 108         var $is_reply;
 109 }
 110
 111
 112 class iilThreadHeader{
 113         var $id;
 114         var $sbj;
 115         var $irt;
 116         var $mid;
 117 }
 118
 119
 120 function iil_xor($string, $string2){
 121     $result = "";
 122     $size = strlen($string);
 123     for ($i=0; $i<$size; $i++) $result .= chr(ord($string[$i]) ^ ord($string2[$i]));
 124
 125     return $result;
 126 }
 127
 128 function iil_ReadLine($fp, $size){
 129         $line="";
 130         if ($fp){
 131                 do{
 132                         $buffer = fgets($fp, 2048);
 133                         $line.=$buffer;
 134                 }while($buffer[strlen($buffer)-1]!="\n");
 135         }
 136         return $line;
 137 }
 138
 139 function iil_MultLine($fp, $line){
 140         $line = chop($line);
 141         if (ereg('\{[0-9]+\}$', $line)){
 142                 $out = "";
 143                 preg_match_all('/(.*)\{([0-9]+)\}$/', $line, $a);
 144                 $bytes = $a[2][0];
 145                 while(strlen($out)<$bytes){
 146                         $out.=chop(iil_ReadLine($fp, 1024));
 147                 }
 148                 $line = $a[1][0]."\"$out\"";
 149         }
 150         return $line;
 151 }
 152
 153 function iil_ReadBytes($fp, $bytes){
 154         $data = "";
 155         $len = 0;
 156         do{
 157                 $data.=fread($fp, $bytes-$len);
 158                 $len = strlen($data);
 159         }while($len<$bytes);
 160         return $data;
 161 }
 162
 163 function iil_ReadReply($fp){
 164         do{
 165                 $line = chop(trim(iil_ReadLine($fp, 1024)));
 166         }while($line[0]=="*");
 167
 168         return $line;
 169 }
 170
 171 function iil_ParseResult($string){
 172         $a=explode(" ", $string);
 173         if (count($a) > 2){
 174                 if (strcasecmp($a[1], "OK")==0) return 0;
 175                 else if (strcasecmp($a[1], "NO")==0) return -1;
 176                 else if (strcasecmp($a[1], "BAD")==0) return -2;
 177         }else return -3;
 178 }
 179
 180 // check if $string starts with $match
 181 function iil_StartsWith($string, $match){
 182         $len = strlen($match);
 183         if ($len==0) return false;
 184         if (strncmp($string, $match, $len)==0) return true;
 185         else return false;
 186 }
 187
 188 function iil_StartsWithI($string, $match){
 189         $len = strlen($match);
 190         if ($len==0) return false;
 191         if (strncasecmp($string, $match, $len)==0) return true;
 192         else return false;
 193 }
 194
 195
 196 function iil_C_Authenticate(&$conn, $user, $pass, $encChallenge){
 197
 198     // initialize ipad, opad
 199     for ($i=0;$i<64;$i++){
 200         $ipad.=chr(0x36);
 201         $opad.=chr(0x5C);
 202     }
 203     // pad $pass so it's 64 bytes
 204     $padLen = 64 - strlen($pass);
 205     for ($i=0;$i<$padLen;$i++) $pass .= chr(0);
 206     // generate hash
 207     $hash = md5(iil_xor($pass,$opad).pack("H*",md5(iil_xor($pass, $ipad).base64_decode($encChallenge))));
 208     // generate reply
 209     $reply = base64_encode($user." ".$hash);
 210
 211     // send result, get reply
 212     fputs($conn->fp, $reply."\r\n");
 213     $line = iil_ReadLine($conn->fp, 1024);
 214
 215     // process result
 216     if (iil_ParseResult($line)==0){
 217         $conn->error .= "";
 218         $conn->errorNum = 0;
 219         return $conn->fp;
 220     }else{
 221         $conn->error .= 'Authentication for '.$user.' failed (AUTH): "'.htmlspecialchars($line)."\"";
 222         $conn->errorNum = -2;
 223         return false;
 224     }
 225 }
 226
 227 function iil_C_Login(&$conn, $user, $password){
 228
 229     $password = strtr($password, array('"'=>'\\"', '\\' => '\\\\'));
 230     fputs($conn->fp, "a001 LOGIN $user \"$password\"\r\n");
 231
 232         do{
 233             $line = iil_ReadReply($conn->fp);
 234         }while(!iil_StartsWith($line, "a001 "));
 235     $a=explode(" ", $line);
 236     if (strcmp($a[1],"OK")==0){
 237         $result=$conn->fp;
 238         $conn->error.="";
 239         $conn->errorNum = 0;
 240     }else{
 241         $result=false;
 242         fclose($conn->fp);
 243         $conn->error .= 'Authentication for '.$user.' failed (LOGIN): "'.htmlspecialchars($line)."\"";
 244         $conn->errorNum = -2;
 245     }
 246     return $result;
 247 }
 248
 249 function iil_ParseNamespace2($str, &$i, $len=0, $l){
 250         if (!$l) $str = str_replace("NIL", "()", $str);
 251         if (!$len) $len = strlen($str);
 252         $data = array();
 253         $in_quotes = false;
 254         $elem = 0;
 255         for($i;$i<$len;$i++){
 256                 $c = (string)$str[$i];
 257                 if ($c=='(' && !$in_quotes){
 258                         $i++;
 259                         $data[$elem] = iil_ParseNamespace2($str, $i, $len, $l++);
 260                         $elem++;
 261                 }else if ($c==')' && !$in_quotes) return $data;
 262                 else if ($c=="\\"){
 263                         $i++;
 264                         if ($in_quotes) $data[$elem].=$c.$str[$i];
 265                 }else if ($c=='"'){
 266                         $in_quotes = !$in_quotes;
 267                         if (!$in_quotes) $elem++;
 268                 }else if ($in_quotes){
 269                         $data[$elem].=$c;
 270                 }
 271         }
 272         return $data;
 273 }
 274
 275 function iil_C_NameSpace(&$conn){
 276         global $my_prefs;
 277
 278         if (!in_array('NAMESPACE', $conn->capability))
 279           return false;
 280
 281         if ($my_prefs["rootdir"]) return true;
 282
 283         fputs($conn->fp, "ns1 NAMESPACE\r\n");
 284         do{
 285                 $line = iil_ReadLine($conn->fp, 1024);
 286                 if (iil_StartsWith($line, "* NAMESPACE")){
 287                         $i = 0;
 288                         $data = iil_ParseNamespace2(substr($line,11), $i, 0, 0);
 289                 }
 290         }while(!iil_StartsWith($line, "ns1"));
 291
 292         if (!is_array($data)) return false;
 293
 294         $user_space_data = $data[0];
 295         if (!is_array($user_space_data)) return false;
 296
 297         $first_userspace = $user_space_data[0];
 298         if (count($first_userspace)!=2) return false;
 299
 300         $conn->rootdir = $first_userspace[0];
 301         $conn->delimiter = $first_userspace[1];
 302         $my_prefs["rootdir"] = substr($conn->rootdir, 0, -1);
 303
 304         return true;
 305
 306 }
 307
 308 function iil_Connect($host, $user, $password){
 309     global $iil_error, $iil_errornum;
 310         global $ICL_SSL, $ICL_PORT;
 311         global $IMAP_NO_CACHE;
 312         global $my_prefs, $IMAP_USE_INTERNAL_DATE;
 313
 314         $iil_error = "";
 315         $iil_errornum = 0;
 316
 317         //strip slashes
 318         // $user = stripslashes($user);
 319         // $password = stripslashes($password);
 320
 321         //set auth method
 322         $auth_method = "plain";
 323         if (func_num_args() >= 4){
 324                 $auth_array = func_get_arg(3);
 325                 if (is_array($auth_array)) $auth_method = $auth_array["imap"];
 326                 if (empty($auth_method)) $auth_method = "plain";
 327         }
 328         $message = "INITIAL: $auth_method\n";
 329
 330         $result = false;
 331
 332         //initialize connection
 333         $conn = new iilConnection;
 334         $conn->error="";
 335         $conn->errorNum=0;
 336         $conn->selected="";
 337         $conn->user = $user;
 338         $conn->host = $host;
 339         $conn->cache = array();
 340         $conn->do_cache = (function_exists("cache_write")&&!$IMAP_NO_CACHE);
 341         $conn->cache_dirty = array();
 342
 343         if ($my_prefs['sort_field']=='INTERNALDATE') $IMAP_USE_INTERNAL_DATE = true;
 344         else if ($my_prefs['sort_field']=='DATE') $IMAP_USE_INTERNAL_DATE = false;
 345         //echo '<!-- conn sort_field: '.$my_prefs['sort_field'].' //-->';
 346
 347         //check input
 348         if (empty($host)) $iil_error .= "Invalid host\n";
 349         if (empty($user)) $iil_error .= "Invalid user\n";
 350         if (empty($password)) $iil_error .= "Invalid password\n";
 351         if (!empty($iil_error)) return false;
 352         if (!$ICL_PORT) $ICL_PORT = 143;
 353
 354         //check for SSL
 355         if ($ICL_SSL){
 356                 $host = "ssl://".$host;
 357         }
 358
 359         //open socket connection
 360         $conn->fp = @fsockopen($host, $ICL_PORT, $errno, $errstr, 10);
 361         if (!$conn->fp){
 362         $iil_error = "Could not connect to $host at port $ICL_PORT: $errstr";
 363         $iil_errornum = -1;
 364                 return false;
 365         }
 366
 367         $iil_error.="Socket connection established\r\n";
 368         $line=iil_ReadLine($conn->fp, 300);
 369
 370         if (strcasecmp($auth_method, "check")==0){
 371                 //check for supported auth methods
 372
 373                 //default to plain text auth
 374                 $auth_method = "plain";
 375
 376                 //check for CRAM-MD5
 377                 fputs($conn->fp, "cp01 CAPABILITY\r\n");
 378                 do{
 379                 $line = trim(chop(iil_ReadLine($conn->fp, 100)));
 380                 $conn->message.="$line\n";
 381                         $a = explode(" ", $line);
 382                         if ($line[0]=="*"){
 383                                 while ( list($k, $w) = each($a) ){
 384                                     if ($w!='*' && $w!='CAPABILITY')
 385                                         $conn->capability[] = $w;
 386                                         if ((strcasecmp($w, "AUTH=CRAM_MD5")==0)||
 387                                                 (strcasecmp($w, "AUTH=CRAM-MD5")==0)){
 388                                                         $auth_method = "auth";
 389                                                 }
 390                                 }
 391                         }
 392                 }while($a[0]!="cp01");
 393         }
 394
 395         if (strcasecmp($auth_method, "auth")==0){
 396                 $conn->message.="Trying CRAM-MD5\n";
 397                 //do CRAM-MD5 authentication
 398                 fputs($conn->fp, "a000 AUTHENTICATE CRAM-MD5\r\n");
 399                 $line = trim(chop(iil_ReadLine($conn->fp, 1024)));
 400                 $conn->message.="$line\n";
 401                 if ($line[0]=="+"){
 402                         $conn->message.='Got challenge: '.htmlspecialchars($line)."\n";
 403                         //got a challenge string, try CRAM-5
 404                         $result = iil_C_Authenticate($conn, $user, $password, substr($line,2));
 405                         $conn->message.= "Tried CRAM-MD5: $result \n";
 406                 }else{
 407                         $conn->message.='No challenge ('.htmlspecialchars($line)."), try plain\n";
 408                         $auth = "plain";
 409                 }
 410         }
 411
 412         if ((!$result)||(strcasecmp($auth, "plain")==0)){
 413                 //do plain text auth
 414                 $result = iil_C_Login($conn, $user, $password);
 415                 $conn->message.="Tried PLAIN: $result \n";
 416         }
 417
 418         $conn->message .= $auth;
 419
 420         if ($result){
 421                 iil_C_Namespace($conn);
 422                 return $conn;
 423         }else{
 424                 $iil_error = $conn->error;
 425                 $iil_errornum = $conn->errorNum;
 426                 return false;
 427         }
 428 }
 429
 430 function iil_Close(&$conn){
 431         iil_C_WriteCache($conn);
 432         if (@fputs($conn->fp, "I LOGOUT\r\n")){
 433                 fgets($conn->fp, 1024);
 434                 fclose($conn->fp);
 435                 $conn->fp = false;
 436         }
 437 }
 438
 439 function iil_ClearCache($user, $host){
 440 }
 441
 442
 443 function iil_C_WriteCache(&$conn){
 444         //echo "<!-- doing iil_C_WriteCache //-->\n";
 445         if (!$conn->do_cache) return false;
 446
 447         if (is_array($conn->cache)){
 448                 while(list($folder,$data)=each($conn->cache)){
 449                         if ($folder && is_array($data) && $conn->cache_dirty[$folder]){
 450                                 $key = $folder.".imap";
 451                                 $result = cache_write($conn->user, $conn->host, $key, $data, true);
 452                                 //echo "<!-- writing $key $data: $result //-->\n";
 453                         }
 454                 }
 455         }
 456 }
 457
 458 function iil_C_EnableCache(&$conn){
 459         $conn->do_cache = true;
 460 }
 461
 462 function iil_C_DisableCache(&$conn){
 463         $conn->do_cache = false;
 464 }
 465
 466 function iil_C_LoadCache(&$conn, $folder){
 467         if (!$conn->do_cache) return false;
 468
 469         $key = $folder.".imap";
 470         if (!is_array($conn->cache[$folder])){
 471                 $conn->cache[$folder] = cache_read($conn->user, $conn->host, $key);
 472                 $conn->cache_dirty[$folder] = false;
 473         }
 474 }
 475
 476 function iil_C_ExpireCachedItems(&$conn, $folder, $message_set){
 477
 478         if (!$conn->do_cache) return;   //caching disabled
 479         if (!is_array($conn->cache[$folder])) return;   //cache not initialized|empty
 480         if (count($conn->cache[$folder])==0) return;    //cache not initialized|empty
 481
 482         $uids = iil_C_FetchHeaderIndex($conn, $folder, $message_set, "UID");
 483         $num_removed = 0;
 484         if (is_array($uids)){
 485                 //echo "<!-- unsetting: ".implode(",",$uids)." //-->\n";
 486                 while(list($n,$uid)=each($uids)){
 487                         unset($conn->cache[$folder][$uid]);
 488                         //$conn->cache[$folder][$uid] = false;
 489                         //$num_removed++;
 490                 }
 491                 $conn->cache_dirty[$folder] = true;
 492
 493                 //echo '<!--'."\n";
 494                 //print_r($conn->cache);
 495                 //echo "\n".'//-->'."\n";
 496         }else{
 497                 echo "<!-- failed to get uids: $message_set //-->\n";
 498         }
 499
 500         /*
 501         if ($num_removed>0){
 502                 $new_cache;
 503                 reset($conn->cache[$folder]);
 504                 while(list($uid,$item)=each($conn->cache[$folder])){
 505                         if ($item) $new_cache[$uid] = $conn->cache[$folder][$uid];
 506                 }
 507                 $conn->cache[$folder] = $new_cache;
 508         }
 509         */
 510 }
 511
 512 function iil_ExplodeQuotedString($delimiter, $string){
 513         $quotes=explode("\"", $string);
 514         while ( list($key, $val) = each($quotes))
 515                 if (($key % 2) == 1)
 516                         $quotes[$key] = str_replace($delimiter, "_!@!_", $quotes[$key]);
 517         $string=implode("\"", $quotes);
 518
 519         $result=explode($delimiter, $string);
 520         while ( list($key, $val) = each($result) )
 521                 $result[$key] = str_replace("_!@!_", $delimiter, $result[$key]);
 522
 523         return $result;
 524 }
 525
 526 function iil_CheckForRecent($host, $user, $password, $mailbox){
 527         if (empty($mailbox)) $mailbox="INBOX";
 528
 529         $conn=iil_Connect($host, $user, $password, "plain");
 530         $fp = $conn->fp;
 531         if ($fp){
 532                 fputs($fp, "a002 EXAMINE \"$mailbox\"\r\n");
 533                 do{
 534                         $line=chop(iil_ReadLine($fp, 300));
 535                         $a=explode(" ", $line);
 536                         if (($a[0]=="*") && (strcasecmp($a[2], "RECENT")==0))  $result=(int)$a[1];
 537                 }while (!iil_StartsWith($a[0],"a002"));
 538
 539                 fputs($fp, "a003 LOGOUT\r\n");
 540                 fclose($fp);
 541         }else $result=-2;
 542
 543         return $result;
 544 }
 545
 546 function iil_C_Select(&$conn, $mailbox){
 547         $fp = $conn->fp;
 548
 549         if (empty($mailbox)) return false;
 550         if (strcmp($conn->selected, $mailbox)==0) return true;
 551
 552         iil_C_LoadCache($conn, $mailbox);
 553
 554         if (fputs($fp, "sel1 SELECT \"$mailbox\"\r\n")){
 555                 do{
 556                         $line=chop(iil_ReadLine($fp, 300));
 557                         $a=explode(" ", $line);
 558                         if (count($a) == 3){
 559                                 if (strcasecmp($a[2], "EXISTS")==0) $conn->exists=(int)$a[1];
 560                                 if (strcasecmp($a[2], "RECENT")==0) $conn->recent=(int)$a[1];
 561                         }
 562                 }while (!iil_StartsWith($line, "sel1"));
 563
 564                 $a=explode(" ", $line);
 565
 566                 if (strcasecmp($a[1],"OK")==0){
 567                         $conn->selected = $mailbox;
 568                         return true;
 569                 }else return false;
 570         }else{
 571                 return false;
 572         }
 573 }
 574
 575 function iil_C_CheckForRecent(&$conn, $mailbox){
 576         if (empty($mailbox)) $mailbox="INBOX";
 577
 578         iil_C_Select($conn, $mailbox);
 579         if ($conn->selected==$mailbox) return $conn->recent;
 580         else return false;
 581 }
 582
 583 function iil_C_CountMessages(&$conn, $mailbox, $refresh=false){
 584         if ($refresh) $conn->selected="";
 585         iil_C_Select($conn, $mailbox);
 586         if ($conn->selected==$mailbox) return $conn->exists;
 587         else return false;
 588 }
 589
 590 function iil_SplitHeaderLine($string){
 591         $pos=strpos($string, ":");
 592         if ($pos>0){
 593                 $res[0]=substr($string, 0, $pos);
 594                 $res[1]=trim(substr($string, $pos+1));
 595                 return $res;
 596         }else{
 597                 return $string;
 598         }
 599 }
 600
 601 function iil_StrToTime($str){
 602         global $IMAP_MONTHS,$IMAP_SERVER_TZ;
 603
 604         if ($str) $time1 = strtotime($str);
 605         if ($time1 && $time1!=-1) return $time1-$IMAP_SERVER_TZ;
 606
 607         //echo '<!--'.$str.'//-->';
 608
 609         //replace double spaces with single space
 610         $str = trim($str);
 611         $str = str_replace("  ", " ", $str);
 612
 613         //strip off day of week
 614         $pos=strpos($str, " ");
 615         if (!is_numeric(substr($str, 0, $pos))) $str = substr($str, $pos+1);
 616
 617         //explode, take good parts
 618         $a=explode(" ",$str);
 619         //$month_a=array("Jan"=>1,"Feb"=>2,"Mar"=>3,"Apr"=>4,"May"=>5,"Jun"=>6,"Jul"=>7,"Aug"=>8,"Sep"=>9,"Oct"=>10,"Nov"=>11,"Dec"=>12);
 620         $month_str=$a[1];
 621         $month=$IMAP_MONTHS[$month_str];
 622         $day=(int)$a[0];
 623         $year=(int)$a[2];
 624         $time=$a[3];
 625         $tz_str = $a[4];
 626         $tz = substr($tz_str, 0, 3);
 627         $ta = explode(":",$time);
 628         $hour=(int)$ta[0]-(int)$tz;
 629         $minute=(int)$ta[1];
 630         $second=(int)$ta[2];
 631
 632         //make UNIX timestamp
 633         $time2 = mktime($hour, $minute, $second, $month, $day, $year);
 634         //echo '<!--'.$time1.' '.$time2.' //-->'."\n";
 635         return $time2;
 636 }
 637
 638 function iil_C_Sort(&$conn, $mailbox, $field, $add='', $is_uid=FALSE, $encoding='US-ASCII'){
 639         /*  Do "SELECT" command */
 640         if (!iil_C_Select($conn, $mailbox)) return false;
 641
 642         $field = strtoupper($field);
 643         if ($field=='INTERNALDATE') $field='ARRIVAL';
 644         $fields = array('ARRIVAL'=>1,'CC'=>1,'DATE'=>1,'FROM'=>1,'SIZE'=>1,'SUBJECT'=>1,'TO'=>1);
 645
 646         if (!$fields[$field])
 647           return false;
 648
 649         $is_uid = $is_uid ? 'UID ' : '';
 650
 651         if (!empty($add))
 652           $add = " $add";
 653
 654         $fp = $conn->fp;
 655         $command = 's '. $is_uid .'SORT ('.$field.') '.$encoding.' ALL'."$add\r\n";
 656         $line = $data = '';
 657
 658         if (!fputs($fp, $command)) return false;
 659         do{
 660                 $line = chop(iil_ReadLine($fp, 1024));
 661                 if (iil_StartsWith($line, '* SORT')) $data.=($data?' ':'').substr($line,7);
 662         }while($line[0]!='s');
 663
 664         if (empty($data)){
 665                 $conn->error = $line;
 666                 return false;
 667         }
 668
 669         $out = explode(' ',$data);
 670         return $out;
 671 }
 672
 673 function iil_C_FetchHeaderIndex(&$conn, $mailbox, $message_set, $index_field, $normalize=true){
 674         global $IMAP_USE_INTERNAL_DATE;
 675
 676         $c=0;
 677         $result=array();
 678         $fp = $conn->fp;
 679
 680         if (empty($index_field)) $index_field="DATE";
 681         $index_field = strtoupper($index_field);
 682
 683         list($from_idx, $to_idx) = explode(':', $message_set);
 684         if (empty($message_set) || (isset($to_idx) && (int)$from_idx > (int)$to_idx))
 685                 return false;
 686
 687         //$fields_a["DATE"] = ($IMAP_USE_INTERNAL_DATE?6:1);
 688         $fields_a['DATE'] = 1;
 689         $fields_a['INTERNALDATE'] = 6;
 690         $fields_a['FROM'] = 1;
 691         $fields_a['REPLY-TO'] = 1;
 692         $fields_a['SENDER'] = 1;
 693         $fields_a['TO'] = 1;
 694         $fields_a['SUBJECT'] = 1;
 695         $fields_a['UID'] = 2;
 696         $fields_a['SIZE'] = 2;
 697         $fields_a['SEEN'] = 3;
 698         $fields_a['RECENT'] = 4;
 699         $fields_a['DELETED'] = 5;
 700
 701         $mode=$fields_a[$index_field];
 702         if (!($mode > 0)) return false;
 703
 704         /*  Do "SELECT" command */
 705         if (!iil_C_Select($conn, $mailbox)) return false;
 706
 707         /* FETCH date,from,subject headers */
 708         if ($mode==1){
 709                 $key="fhi".($c++);
 710                 $request=$key." FETCH $message_set (BODY.PEEK[HEADER.FIELDS ($index_field)])\r\n";
 711                 if (!fputs($fp, $request)) return false;
 712                 do{
 713
 714                         $line=chop(iil_ReadLine($fp, 200));
 715                         $a=explode(" ", $line);
 716                         if (($line[0]=="*") && ($a[2]=="FETCH") && ($line[strlen($line)-1]!=")")){
 717                                 $id=$a[1];
 718
 719                                 $str=$line=chop(iil_ReadLine($fp, 300));
 720
 721                                 while($line[0]!=")"){                                   //caution, this line works only in this particular case
 722                                         $line=chop(iil_ReadLine($fp, 300));
 723                                         if ($line[0]!=")"){
 724                                                 if (ord($line[0]) <= 32){                       //continuation from previous header line
 725                                                         $str.=" ".trim($line);
 726                                                 }
 727                                                 if ((ord($line[0]) > 32) || (strlen($line[0]) == 0)){
 728                                                         list($field, $string) = iil_SplitHeaderLine($str);
 729                                                         if (strcasecmp($field, "date")==0){
 730                                                                 $result[$id]=iil_StrToTime($string);
 731                                                         }else{
 732                                                                 $result[$id] = str_replace("\"", "", $string);
 733                                                                 if ($normalize) $result[$id]=strtoupper($result[$id]);
 734                                                         }
 735                                                         $str=$line;
 736                                                 }
 737                                         }
 738                                 }
 739                         }
 740                         /*
 741                         $end_pos = strlen($line)-1;
 742                         if (($line[0]=="*") && ($a[2]=="FETCH") && ($line[$end_pos]=="}")){
 743                                 $id = $a[1];
 744                                 $pos = strrpos($line, "{")+1;
 745                                 $bytes = (int)substr($line, $pos, $end_pos-$pos);
 746                                 $received = 0;
 747                                 do{
 748                                         $line = iil_ReadLine($fp, 0);
 749                                         $received+=strlen($line);
 750                                         $line = chop($line);
 751
 752                                         if ($received>$bytes) break;
 753                                         else if (!$line) continue;
 754
 755                                         list($field,$string)=explode(": ", $line);
 756
 757                                         if (strcasecmp($field, "date")==0)
 758                                                 $result[$id] = iil_StrToTime($string);
 759                                         else if ($index_field!="DATE")
 760                                                 $result[$id]=strtoupper(str_replace("\"", "", $string));
 761                                 }while($line[0]!=")");
 762                         }else{
 763                                 //one line response, not expected so ignore
 764                         }
 765                         */
 766                 }while(!iil_StartsWith($line, $key));
 767         }else if ($mode==6){
 768                 $key="fhi".($c++);
 769                 $request = $key." FETCH $message_set (INTERNALDATE)\r\n";
 770                 if (!fputs($fp, $request)) return false;
 771                 do{
 772                         $line=chop(iil_ReadLine($fp, 200));
 773                         if ($line[0]=="*"){
 774                                 //original: "* 10 FETCH (INTERNALDATE "31-Jul-2002 09:18:02 -0500")"
 775                                 $paren_pos = strpos($line, "(");
 776                                 $foo = substr($line, 0, $paren_pos);
 777                                 $a = explode(" ", $foo);
 778                                 $id = $a[1];
 779
 780                                 $open_pos = strpos($line, "\"") + 1;
 781                                 $close_pos = strrpos($line, "\"");
 782                                 if ($open_pos && $close_pos){
 783                                         $len = $close_pos - $open_pos;
 784                                         $time_str = substr($line, $open_pos, $len);
 785                                         $result[$id] = strtotime($time_str);
 786                                 }
 787                         }else{
 788                                 $a = explode(" ", $line);
 789                         }
 790                 }while(!iil_StartsWith($a[0], $key));
 791         }else{
 792                 if ($mode >= 3) $field_name="FLAGS";
 793                 else if ($index_field=="SIZE") $field_name="RFC822.SIZE";
 794                 else $field_name=$index_field;
 795
 796                 /*                      FETCH uid, size, flags          */
 797                 $key="fhi".($c++);
 798                 $request=$key." FETCH $message_set ($field_name)\r\n";
 799
 800                 if (!fputs($fp, $request)) return false;
 801                 do{
 802                         $line=chop(iil_ReadLine($fp, 200));
 803                         $a = explode(" ", $line);
 804                         if (($line[0]=="*") && ($a[2]=="FETCH")){
 805                                 $line=str_replace("(", "", $line);
 806                                 $line=str_replace(")", "", $line);
 807                                 $a=explode(" ", $line);
 808
 809                                 $id=$a[1];
 810
 811                                 if (isset($result[$id])) continue; //if we already got the data, skip forward
 812                                 if ($a[3]!=$field_name) continue;  //make sure it's returning what we requested
 813
 814                                 /*  Caution, bad assumptions, next several lines */
 815                                 if ($mode==2) $result[$id]=$a[4];
 816                                 else{
 817                                         $haystack=strtoupper($line);
 818                                         $result[$id]=(strpos($haystack, $index_field) > 0 ? "F" : "N");
 819                                 }
 820                         }
 821                 }while(!iil_StartsWith($line, $key));
 822         }
 823
 824         //check number of elements...
 825         list($start_mid,$end_mid)=explode(':',$message_set);
 826         if (is_numeric($start_mid) && is_numeric($end_mid)){
 827                 //count how many we should have
 828                 $should_have = $end_mid - $start_mid +1;
 829
 830                 //if we have less, try and fill in the "gaps"
 831                 if (count($result)<$should_have){
 832                         for($i=$start_mid;$i<=$end_mid;$i++) if (!isset($result[$i])) $result[$i] = '';
 833                 }
 834         }
 835
 836         return $result;
 837
 838 }
 839
 840 function iil_CompressMessageSet($message_set){
 841         //given a comma delimited list of independent mid's,
 842         //compresses by grouping sequences together
 843
 844         //if less than 255 bytes long, let's not bother
 845         if (strlen($message_set)<255) return $message_set;
 846
 847         //see if it's already been compress
 848         if (strpos($message_set,':')!==false) return $message_set;
 849
 850         //separate, then sort
 851         $ids = explode(',',$message_set);
 852         sort($ids);
 853
 854         $result = array();
 855         $start = $prev = $ids[0];
 856         foreach($ids as $id){
 857                 $incr = $id - $prev;
 858                 if ($incr>1){                   //found a gap
 859                         if ($start==$prev) $result[] = $prev;   //push single id
 860                         else $result[] = $start.':'.$prev;              //push sequence as start_id:end_id
 861                         $start = $id;                                                   //start of new sequence
 862                 }
 863                 $prev = $id;
 864         }
 865         //handle the last sequence/id
 866         if ($start==$prev) $result[] = $prev;
 867         else $result[] = $start.':'.$prev;
 868
 869         //return as comma separated string
 870         return implode(',',$result);
 871 }
 872
 873 function iil_C_UIDsToMIDs(&$conn, $mailbox, $uids){
 874         if (!is_array($uids) || count($uids)==0) return array();
 875         return iil_C_Search($conn, $mailbox, "UID ".implode(",", $uids));
 876 }
 877
 878 function iil_C_UIDToMID(&$conn, $mailbox, $uid){
 879         $result = iil_C_UIDsToMIDs($conn, $mailbox, array($uid));
 880         if (count($result)==1) return $result[0];
 881         else return false;
 882 }
 883
 884 function iil_C_FetchUIDs(&$conn,$mailbox){
 885         global $clock;
 886
 887         $num = iil_C_CountMessages($conn, $mailbox);
 888         if ($num==0) return array();
 889         $message_set = '1'.($num>1?':'.$num:'');
 890
 891         //if cache not enabled, just call iil_C_FetchHeaderIndex on 'UID' field
 892         if (!$conn->do_cache)
 893                 return iil_C_FetchHeaderIndex($conn, $mailbox, $message_set, 'UID');
 894
 895         //otherwise, let's check cache first
 896         $key = $mailbox.'.uids';
 897         $cache_good = true;
 898         if ($conn->uid_cache) $data = $conn->uid_cache;
 899         else $data = cache_read($conn->user, $conn->host, $key);
 900
 901         //was anything cached at all?
 902         if ($data===false) $cache_good = -1;
 903
 904         //make sure number of messages were the same
 905         if ($cache_good>0 && $data['n']!=$num) $cache_good = -2;
 906
 907         //if everything's okay so far...
 908         if ($cache_good>0){
 909                 //check UIDs of highest mid with current and cached
 910                 $temp = iil_C_Search($conn, $mailbox, 'UID '.$data['d'][$num]);
 911                 if (!$temp || !is_array($temp) || $temp[0]!=$num) $cache_good=-3;
 912         }
 913
 914         //if cached data's good, return it
 915         if ($cache_good>0){
 916                 return $data['d'];
 917         }
 918
 919         //otherwise, we need to fetch it
 920         $data = array('n'=>$num,'d'=>array());
 921         $data['d'] = iil_C_FetchHeaderIndex($conn, $mailbox, $message_set, 'UID');
 922         cache_write($conn->user, $conn->host, $key, $data);
 923         $conn->uid_cache = $data;
 924         return $data['d'];
 925 }
 926
 927 function iil_SortThreadHeaders($headers, $index_a, $uids){
 928         asort($index_a);
 929         $result = array();
 930         foreach($index_a as $mid=>$foobar){
 931                 $uid = $uids[$mid];
 932                 $result[$uid] = $headers[$uid];
 933         }
 934         return $result;
 935 }
 936
 937 function iil_C_FetchThreadHeaders(&$conn, $mailbox, $message_set){
 938         global $clock;
 939         global $index_a;
 940
 941         list($from_idx, $to_idx) = explode(':', $message_set);
 942         if (empty($message_set) || (isset($to_idx) && (int)$from_idx > (int)$to_idx))
 943                 return false;
 944
 945         $result = array();
 946         $uids = iil_C_FetchUIDs($conn, $mailbox);
 947         $debug = false;
 948
 949         /* Get cached records where possible */
 950         if ($conn->do_cache){
 951                 $cached = cache_read($conn->user, $conn->host, $mailbox.'.thhd');
 952                 if ($cached && is_array($uids) && count($uids)>0){
 953                         $needed_set = "";
 954                         foreach($uids as $id=>$uid){
 955                                 if ($cached[$uid]){
 956                                         $result[$uid] = $cached[$uid];
 957                                         $result[$uid]->id = $id;
 958                                 }else $needed_set.=($needed_set?",":"").$id;
 959                         }
 960                         if ($needed_set) $message_set = $needed_set;
 961                         else $message_set = '';
 962                 }
 963         }
 964         $message_set = iil_CompressMessageSet($message_set);
 965         if ($debug) echo "Still need: ".$message_set;
 966
 967         /* if we're missing any, get them */
 968         if ($message_set){
 969                 /* FETCH date,from,subject headers */
 970                 $key="fh";
 971                 $fp = $conn->fp;
 972                 $request=$key." FETCH $message_set (BODY.PEEK[HEADER.FIELDS (SUBJECT MESSAGE-ID IN-REPLY-TO)])\r\n";
 973                 $mid_to_id = array();
 974                 if (!fputs($fp, $request)) return false;
 975                 do{
 976                         $line = chop(iil_ReadLine($fp, 1024));
 977                         if ($debug) echo $line."\n";
 978                         if (ereg('\{[0-9]+\}$', $line)){
 979                                 $a = explode(" ", $line);
 980                                 $new = array();
 981
 982                                 $new_thhd = new iilThreadHeader;
 983                                 $new_thhd->id = $a[1];
 984                                 do{
 985                                         $line=chop(iil_ReadLine($fp, 1024),"\r\n");
 986                                         if (iil_StartsWithI($line,'Message-ID:') || (iil_StartsWithI($line,'In-Reply-To:')) || (iil_StartsWithI($line,'SUBJECT:'))){
 987                                                 $pos = strpos($line, ":");
 988                                                 $field_name = substr($line, 0, $pos);
 989                                                 $field_val = substr($line, $pos+1);
 990                                                 $new[strtoupper($field_name)] = trim($field_val);
 991                                         }else if (ereg('^[[:space:]]', $line)){
 992                                                 $new[strtoupper($field_name)].= trim($line);
 993                                         }
 994                                 }while($line[0]!=')');
 995                                 $new_thhd->sbj = $new['SUBJECT'];
 996                                 $new_thhd->mid = substr($new['MESSAGE-ID'], 1, -1);
 997                                 $new_thhd->irt = substr($new['IN-REPLY-TO'], 1, -1);
 998
 999                                 $result[$uids[$new_thhd->id]] = $new_thhd;
1000                         }
1001                 }while(!iil_StartsWith($line, "fh"));
1002         }
1003
1004         /* sort headers */
1005         if (is_array($index_a)){
1006                 $result = iil_SortThreadHeaders($result, $index_a, $uids);
1007         }
1008
1009         /* write new set to cache */
1010         if ($conn->do_cache){
1011                 if (count($result)!=count($cached))
1012                         cache_write($conn->user, $conn->host, $mailbox.'.thhd', $result);
1013         }
1014
1015         //echo 'iil_FetchThreadHeaders:'."\n";
1016         //print_r($result);
1017
1018         return $result;
1019 }
1020
1021 function iil_C_BuildThreads2(&$conn, $mailbox, $message_set, &$clock){
1022         global $index_a;
1023
1024         list($from_idx, $to_idx) = explode(':', $message_set);
1025         if (empty($message_set) || (isset($to_idx) && (int)$from_idx > (int)$to_idx))
1026                 return false;
1027
1028         $result=array();
1029         $roots=array();
1030         $root_mids = array();
1031         $sub_mids = array();
1032         $strays = array();
1033         $messages = array();
1034         $fp = $conn->fp;
1035         $debug = false;
1036
1037         $sbj_filter_pat = '[a-zA-Z]{2,3}(\[[0-9]*\])?:([[:space:]]*)';
1038
1039         /*  Do "SELECT" command */
1040         if (!iil_C_Select($conn, $mailbox)) return false;
1041
1042         /* FETCH date,from,subject headers */
1043         $mid_to_id = array();
1044         $messages = array();
1045         $headers = iil_C_FetchThreadHeaders($conn, $mailbox, $message_set);
1046         if ($clock) $clock->register('fetched headers');
1047
1048         if ($debug) print_r($headers);
1049
1050         /* go through header records */
1051         foreach($headers as $header){
1052                 //$id = $header['i'];
1053                 //$new = array('id'=>$id, 'MESSAGE-ID'=>$header['m'],
1054                 //                      'IN-REPLY-TO'=>$header['r'], 'SUBJECT'=>$header['s']);
1055                 $id = $header->id;
1056                 $new = array('id'=>$id, 'MESSAGE-ID'=>$header->mid,
1057                                         'IN-REPLY-TO'=>$header->irt, 'SUBJECT'=>$header->sbj);
1058
1059                 /* add to message-id -> mid lookup table */
1060                 $mid_to_id[$new['MESSAGE-ID']] = $id;
1061
1062                 /* if no subject, use message-id */
1063                 if (empty($new['SUBJECT'])) $new['SUBJECT'] = $new['MESSAGE-ID'];
1064
1065                 /* if subject contains 'RE:' or has in-reply-to header, it's a reply */
1066                 $sbj_pre ='';
1067                 $has_re = false;
1068                 if (eregi($sbj_filter_pat, $new['SUBJECT'])) $has_re = true;
1069                 if ($has_re||$new['IN-REPLY-TO']) $sbj_pre = 'RE:';
1070
1071                 /* strip out 're:', 'fw:' etc */
1072                 if ($has_re) $sbj = ereg_replace($sbj_filter_pat,'', $new['SUBJECT']);
1073                 else $sbj = $new['SUBJECT'];
1074                 $new['SUBJECT'] = $sbj_pre.$sbj;
1075
1076
1077                 /* if subject not a known thread-root, add to list */
1078                 if ($debug) echo $id.' '.$new['SUBJECT']."\t".$new['MESSAGE-ID']."\n";
1079                 $root_id = $roots[$sbj];
1080
1081                 if ($root_id && ($has_re || !$root_in_root[$root_id])){
1082                         if ($debug) echo "\tfound root: $root_id\n";
1083                         $sub_mids[$new['MESSAGE-ID']] = $root_id;
1084                         $result[$root_id][] = $id;
1085                 }else if (!isset($roots[$sbj])||(!$has_re&&$root_in_root[$root_id])){
1086                         /* try to use In-Reply-To header to find root
1087                                 unless subject contains 'Re:' */
1088                         if ($has_re&&$new['IN-REPLY-TO']){
1089                                 if ($debug) echo "\tlooking: ".$new['IN-REPLY-TO']."\n";
1090
1091                                 //reply to known message?
1092                                 $temp = $sub_mids[$new['IN-REPLY-TO']];
1093
1094                                 if ($temp){
1095                                         //found it, root:=parent's root
1096                                         if ($debug) echo "\tfound parent: ".$new['SUBJECT']."\n";
1097                                         $result[$temp][] = $id;
1098                                         $sub_mids[$new['MESSAGE-ID']] = $temp;
1099                                         $sbj = '';
1100                                 }else{
1101                                         //if we can't find referenced parent, it's a "stray"
1102                                         $strays[$id] = $new['IN-REPLY-TO'];
1103                                 }
1104                         }
1105
1106                         //add subject as root
1107                         if ($sbj){
1108                                 if ($debug) echo "\t added to root\n";
1109                                 $roots[$sbj] = $id;
1110                                 $root_in_root[$id] = !$has_re;
1111                                 $sub_mids[$new['MESSAGE-ID']] = $id;
1112                                 $result[$id] = array($id);
1113                         }
1114                         if ($debug) echo $new['MESSAGE-ID']."\t".$sbj."\n";
1115                 }
1116
1117         }
1118
1119         //now that we've gone through all the messages,
1120         //go back and try and link up the stray threads
1121         if (count($strays)>0){
1122                 foreach($strays as $id=>$irt){
1123                         $root_id = $sub_mids[$irt];
1124                         if (!$root_id || $root_id==$id) continue;
1125                         $result[$root_id] = array_merge($result[$root_id],$result[$id]);
1126                         unset($result[$id]);
1127                 }
1128         }
1129
1130         if ($clock) $clock->register('data prepped');
1131
1132         if ($debug) print_r($roots);
1133         //print_r($result);
1134         return $result;
1135 }
1136
1137
1138 function iil_SortThreads(&$tree, $index, $sort_order='ASC'){
1139         if (!is_array($tree) || !is_array($index)) return false;
1140
1141         //create an id to position lookup table
1142         $i = 0;
1143         foreach($index as $id=>$val){
1144                 $i++;
1145                 $index[$id] = $i;
1146         }
1147         $max = $i+1;
1148
1149         //for each tree, set array key to position
1150         $itree = array();
1151         foreach($tree as $id=>$node){
1152                 if (count($tree[$id])<=1){
1153                         //for "threads" with only one message, key is position of that message
1154                         $n = $index[$id];
1155                         $itree[$n] = array($n=>$id);
1156                 }else{
1157                         //for "threads" with multiple messages,
1158                         $min = $max;
1159                         $new_a = array();
1160                         foreach($tree[$id] as $mid){
1161                                 $new_a[$index[$mid]] = $mid;            //create new sub-array mapping position to id
1162                                 $pos = $index[$mid];
1163                                 if ($pos&&$pos<$min) $min = $index[$mid];       //find smallest position
1164                         }
1165                         $n = $min;      //smallest position of child is thread position
1166
1167                         //assign smallest position to root level key
1168                         //set children array to one created above
1169                         ksort($new_a);
1170                         $itree[$n] = $new_a;
1171                 }
1172         }
1173
1174
1175         //sort by key, this basically sorts all threads
1176         ksort($itree);
1177         $i=0;
1178         $out=array();
1179         foreach($itree as $k=>$node){
1180                 $out[$i] = $itree[$k];
1181                 $i++;
1182         }
1183
1184         //return
1185         return $out;
1186 }
1187
1188 function iil_IndexThreads(&$tree){
1189         /* creates array mapping mid to thread id */
1190
1191         if (!is_array($tree)) return false;
1192
1193         $t_index = array();
1194         foreach($tree as $pos=>$kids){
1195                 foreach($kids as $kid) $t_index[$kid] = $pos;
1196         }
1197
1198         return $t_index;
1199 }
1200
1201 function iil_C_FetchHeaders(&$conn, $mailbox, $message_set, $uidfetch=false){
1202         global $IMAP_USE_INTERNAL_DATE;
1203
1204         $c=0;
1205         $result=array();
1206         $fp = $conn->fp;
1207
1208         list($from_idx, $to_idx) = explode(':', $message_set);
1209         if (empty($message_set) || (isset($to_idx) && (int)$from_idx > (int)$to_idx))
1210                 return false;
1211
1212         /*  Do "SELECT" command */
1213         if (!iil_C_Select($conn, $mailbox)){
1214                 $conn->error = "Couldn't select $mailbox";
1215                 return false;
1216         }
1217
1218         /* Get cached records where possible */
1219         if ($conn->do_cache){
1220                 $uids = iil_C_FetchHeaderIndex($conn, $mailbox, $message_set, "UID");
1221                 if (is_array($uids) && count($conn->cache[$mailbox]>0)){
1222                         $needed_set = "";
1223                         while(list($id,$uid)=each($uids)){
1224                                 if ($conn->cache[$mailbox][$uid]){
1225                                         $result[$id] = $conn->cache[$mailbox][$uid];
1226                                         $result[$id]->id = $id;
1227                                 }else $needed_set.=($needed_set?",":"").$id;
1228                         }
1229                         //echo "<!-- iil_C_FetchHeader\nMessage Set: $message_set\nNeeded Set:$needed_set\n//-->\n";
1230                         if ($needed_set) $message_set = iil_CompressMessageSet($needed_set);
1231                         else return $result;
1232                 }
1233         }
1234
1235         /* FETCH date,from,subject headers */
1236         $key="fh".($c++);
1237         $prefix=$uidfetch?" UID":"";
1238         $request=$key.$prefix." FETCH $message_set (BODY.PEEK[HEADER.FIELDS (DATE FROM TO SUBJECT REPLY-TO IN-REPLY-TO CC BCC CONTENT-TRANSFER-ENCODING CONTENT-TYPE MESSAGE-ID REFERENCE)])\r\n";
1239
1240         if (!fputs($fp, $request)) return false;
1241         do{
1242                 $line=chop(iil_ReadLine($fp, 200));
1243                 $a=explode(" ", $line);
1244                 if (($line[0]=="*") && ($a[2]=="FETCH")){
1245                         $id=$a[1];
1246                         $result[$id]=new iilBasicHeader;
1247                         $result[$id]->id = $id;
1248                         $result[$id]->subject = "";
1249                         /*
1250                                 Start parsing headers.  The problem is, some header "lines" take up multiple lines.
1251                                 So, we'll read ahead, and if the one we're reading now is a valid header, we'll
1252                                 process the previous line.  Otherwise, we'll keep adding the strings until we come
1253                                 to the next valid header line.
1254                         */
1255                         $i = 0;
1256                         $lines = array();
1257                         do{
1258                                 $line = chop(iil_ReadLine($fp, 300),"\r\n");
1259                                 if (ord($line[0])<=32) $lines[$i].=(empty($lines[$i])?"":"\n").trim(chop($line));
1260                                 else{
1261                                         $i++;
1262                                         $lines[$i] = trim(chop($line));
1263                                 }
1264                         }while($line[0]!=")" && strncmp($line, $key, strlen($key)));  // patch from "Maksim Rubis" <siburny@hotmail.com>
1265
1266             if(strncmp($line, $key, strlen($key)))
1267             {
1268                         //process header, fill iilBasicHeader obj.
1269                         //      initialize
1270                         if (is_array($headers)){
1271                                 reset($headers);
1272                                 while ( list($k, $bar) = each($headers) ) $headers[$k] = "";
1273                         }
1274
1275                         //      create array with header field:data
1276                         $headers = array();
1277                         while ( list($lines_key, $str) = each($lines) ){
1278                                 list($field, $string) = iil_SplitHeaderLine($str);
1279                                 $field = strtolower($field);
1280                                 $headers[$field] = $string;
1281                         }
1282                         $result[$id]->date = $headers["date"];
1283                         $result[$id]->timestamp = iil_StrToTime($headers["date"]);
1284                         $result[$id]->from = $headers["from"];
1285                         $result[$id]->to = str_replace("\n", " ", $headers["to"]);
1286                         $result[$id]->subject = str_replace("\n", "", $headers["subject"]);
1287                         $result[$id]->replyto = str_replace("\n", " ", $headers["reply-to"]);
1288                         $result[$id]->cc = str_replace("\n", " ", $headers["cc"]);
1289                         $result[$id]->bcc = str_replace("\n", " ", $headers["bcc"]);
1290                         $result[$id]->encoding = str_replace("\n", " ", $headers["content-transfer-encoding"]);
1291                         $result[$id]->ctype = str_replace("\n", " ", $headers["content-type"]);
1292                         $result[$id]->in_reply_to = ereg_replace("[\n<>]",'', $headers['in-reply-to']);
1293                         $result[$id]->reference = $headers["reference"];
1294
1295                         list($result[$id]->ctype, $ctype_add) = explode(";", $headers["content-type"]);
1296
1297                         if (preg_match('/charset="?([a-z0-9\-]+)"?/i', $ctype_add, $regs))
1298                                 $result[$id]->charset = $regs[1];
1299
1300                         $messageID = $headers["message-id"];
1301                         if (!$messageID) "mid:".$id;
1302                         $result[$id]->messageID = $messageID;
1303                         }
1304             else {
1305             $a=explode(" ", $line);
1306             }
1307
1308                 }
1309         }while(strcmp($a[0], $key)!=0);
1310
1311         /*
1312                 FETCH uid, size, flags
1313                 Sample reply line: "* 3 FETCH (UID 2417 RFC822.SIZE 2730 FLAGS (\Seen \Deleted))"
1314         */
1315         $command_key="fh".($c++);
1316         $request= $command_key.$prefix." FETCH $message_set (UID RFC822.SIZE FLAGS INTERNALDATE)\r\n";
1317         if (!fputs($fp, $request)) return false;
1318         do{
1319                 $line=chop(iil_ReadLine($fp, 200));
1320                 //$a = explode(" ", $line);
1321                 //if (($line[0]=="*") && ($a[2]=="FETCH")){
1322                 if ($line[0]=="*"){
1323                         //echo "<!-- $line //-->\n";
1324                         //get outter most parens
1325                         $open_pos = strpos($line, "(") + 1;
1326                         $close_pos = strrpos($line, ")");
1327                         if ($open_pos && $close_pos){
1328                                 //extract ID from pre-paren
1329                                 $pre_str = substr($line, 0, $open_pos);
1330                                 $pre_a = explode(" ", $line);
1331                                 $id = $pre_a[1];
1332
1333                                 //get data
1334                                 $len = $close_pos - $open_pos;
1335                                 $str = substr($line, $open_pos, $len);
1336
1337                                 //swap parents with quotes, then explode
1338                                 $str = eregi_replace("[()]", "\"", $str);
1339                                 $a = iil_ExplodeQuotedString(" ", $str);
1340
1341                                 //did we get the right number of replies?
1342                                 $parts_count = count($a);
1343                                 if ($parts_count>=8){
1344                                         for ($i=0;$i<$parts_count;$i=$i+2){
1345                                                 if (strcasecmp($a[$i],"UID")==0) $result[$id]->uid=$a[$i+1];
1346                                                 else if (strcasecmp($a[$i],"RFC822.SIZE")==0) $result[$id]->size=$a[$i+1];
1347                                                 else if (strcasecmp($a[$i],"INTERNALDATE")==0) $time_str = $a[$i+1];
1348                                                 else if (strcasecmp($a[$i],"FLAGS")==0) $flags_str = $a[$i+1];
1349                                         }
1350
1351                                         // process flags
1352                                         $flags_str = eregi_replace('[\\\"]', "", $flags_str);
1353                                         $flags_a = explode(" ", $flags_str);
1354                                         //echo "<!-- ID: $id FLAGS: ".implode(",", $flags_a)." //-->\n";
1355
1356                                         $result[$id]->seen = false;
1357                                         $result[$id]->recent = false;
1358                                         $result[$id]->deleted = false;
1359                                         $result[$id]->answered = false;
1360                                         if (is_array($flags_a)){
1361                                                 reset($flags_a);
1362                                                 while (list($key,$val)=each($flags_a)){
1363                                                         if (strcasecmp($val,"Seen")==0) $result[$id]->seen = true;
1364                                                         else if (strcasecmp($val, "Deleted")==0) $result[$id]->deleted=true;
1365                                                         else if (strcasecmp($val, "Recent")==0) $result[$id]->recent = true;
1366                                                         else if (strcasecmp($val, "Answered")==0) $result[$id]->answered = true;
1367                                                 }
1368                                                 $result[$id]->flags=$flags_str;
1369                                         }
1370
1371                                         // if time is gmt...
1372                                         $time_str = str_replace('GMT','+0000',$time_str);
1373
1374                                         //get timezone
1375                                         $time_str = substr($time_str, 0, -1);
1376                                         $time_zone_str = substr($time_str, -5); //extract timezone
1377                                         $time_str = substr($time_str, 1, -6); //remove quotes
1378                                         $time_zone = (float)substr($time_zone_str, 1, 2); //get first two digits
1379                                         if ($time_zone_str[3]!='0') $time_zone += 0.5;  //handle half hour offset
1380                                         if ($time_zone_str[0]=="-") $time_zone = $time_zone * -1.0; //minus?
1381                                         $result[$id]->internaldate = $time_str;
1382
1383                                         if ($IMAP_USE_INTERNAL_DATE){
1384                                                 //calculate timestamp
1385                                                 $timestamp = strtotime($time_str); //return's server's time
1386                                                 $na_timestamp = $timestamp;
1387                                                 $timestamp -= $time_zone * 3600; //compensate for tz, get GMT
1388                                                 $result[$id]->timestamp = $timestamp;
1389                                         }
1390
1391                                         if ($conn->do_cache){
1392                                                 $uid = $result[$id]->uid;
1393                                                 $conn->cache[$mailbox][$uid] = $result[$id];
1394                                                 $conn->cache_dirty[$mailbox] = true;
1395                                         }
1396                                         //echo "<!-- ID: $id : $time_str -- local: $na_timestamp (".date("F j, Y, g:i a", $na_timestamp).") tz: $time_zone -- GMT: ".$timestamp." (".date("F j, Y, g:i a", $timestamp).")  //-->\n";
1397                                 }else{
1398                                         //echo "<!-- ERROR: $id : $str //-->\n";
1399                                 }
1400                         }
1401                 }
1402         }while(strpos($line, $command_key)===false);
1403
1404         return $result;
1405 }
1406
1407
1408 function iil_C_FetchHeader(&$conn, $mailbox, $id, $uidfetch=false){
1409         $fp = $conn->fp;
1410         $a=iil_C_FetchHeaders($conn, $mailbox, $id, $uidfetch);
1411         if (is_array($a)) return array_shift($a);
1412         else return false;
1413 }
1414
1415
1416 function iil_SortHeaders($a, $field, $flag){
1417         if (empty($field)) $field="uid";
1418         $field=strtolower($field);
1419         if ($field=="date"||$field=='internaldate') $field="timestamp";
1420         if (empty($flag)) $flag="ASC";
1421         $flag=strtoupper($flag);
1422         $stripArr = ($field=='subject') ? array('Re: ','Fwd: ','Fw: ',"\"") : array("\"");
1423
1424         $c=count($a);
1425         if ($c>0){
1426                 /*
1427                         Strategy:
1428                         First, we'll create an "index" array.
1429                         Then, we'll use sort() on that array,
1430                         and use that to sort the main array.
1431                 */
1432
1433                 // create "index" array
1434                 $index=array();
1435                 reset($a);
1436                 while (list($key, $val)=each($a)){
1437
1438                         if ($field=="timestamp"){
1439                                 $data = @strtotime($val->date);
1440                                 if ($data == false)
1441                                         $data = $val->timestamp;
1442                                 }
1443                         else {
1444                                 $data = $val->$field;
1445                                 if (is_string($data))
1446                                         $data=strtoupper(str_replace($stripArr, "", $data));
1447                                 }
1448
1449                         $index[$key]=$data;
1450                 }
1451
1452                 // sort index
1453                 $i=0;
1454                 if ($flag=="ASC") asort($index);
1455                 else arsort($index);
1456
1457                 // form new array based on index
1458                 $result=array();
1459                 reset($index);
1460                 while (list($key, $val)=each($index)){
1461                         $result[$key]=$a[$key];
1462                         $i++;
1463                 }
1464         }
1465
1466         return $result;
1467 }
1468
1469 function iil_C_Expunge(&$conn, $mailbox){
1470         $fp = $conn->fp;
1471         if (iil_C_Select($conn, $mailbox)){
1472                 $c=0;
1473                 fputs($fp, "exp1 EXPUNGE\r\n");
1474                 do{
1475                         $line=chop(iil_ReadLine($fp, 100));
1476                         if ($line[0]=="*") $c++;
1477                 }while (!iil_StartsWith($line, "exp1"));
1478
1479                 if (iil_ParseResult($line) == 0){
1480                         $conn->selected = ""; //state has changed, need to reselect
1481                         //$conn->exists-=$c;
1482                         return $c;
1483                 }else{
1484                         $conn->error = $line;
1485                         return -1;
1486                 }
1487         }
1488
1489         return -1;
1490 }
1491
1492 function iil_C_ModFlag(&$conn, $mailbox, $messages, $flag, $mod){
1493         if ($mod!="+" && $mod!="-") return -1;
1494
1495         $fp = $conn->fp;
1496         $flags=array(
1497                     "SEEN"=>"\\Seen",
1498                     "DELETED"=>"\\Deleted",
1499                     "RECENT"=>"\\Recent",
1500                     "ANSWERED"=>"\\Answered",
1501                     "DRAFT"=>"\\Draft",
1502                                         "FLAGGED"=>"\\Flagged"
1503                    );
1504         $flag=strtoupper($flag);
1505         $flag=$flags[$flag];
1506         if (iil_C_Select($conn, $mailbox)){
1507                 $c=0;
1508                 fputs($fp, "flg STORE $messages ".$mod."FLAGS (".$flag.")\r\n");
1509                 do{
1510                         $line=chop(iil_ReadLine($fp, 100));
1511                         if ($line[0]=="*") $c++;
1512                 }while (!iil_StartsWith($line, "flg"));
1513
1514                 if (iil_ParseResult($line) == 0){
1515                         iil_C_ExpireCachedItems($conn, $mailbox, $messages);
1516                         return $c;
1517                 }else{
1518                         $conn->error = $line;
1519                         return -1;
1520                 }
1521         }else{
1522                 $conn->error = "Select failed";
1523                 return -1;
1524         }
1525 }
1526
1527 function iil_C_Flag(&$conn, $mailbox, $messages, $flag){
1528         return iil_C_ModFlag($conn, $mailbox, $messages, $flag, "+");
1529 }
1530
1531 function iil_C_Unflag(&$conn, $mailbox, $messages, $flag){
1532         return iil_C_ModFlag($conn, $mailbox, $messages, $flag, "-");
1533 }
1534
1535 function iil_C_Delete(&$conn, $mailbox, $messages){
1536         return iil_C_ModFlag($conn, $mailbox, $messages, "DELETED", "+");
1537 }
1538
1539 function iil_C_Undelete(&$conn, $mailbox, $messages){
1540         return iil_C_ModFlag($conn, $mailbox, $messages, "DELETED", "-");
1541 }
1542
1543
1544 function iil_C_Unseen(&$conn, $mailbox, $messages){
1545         return iil_C_ModFlag($conn, $mailbox, $messages, "SEEN", "-");
1546 }
1547
1548
1549 function iil_C_Copy(&$conn, $messages, $from, $to){
1550         $fp = $conn->fp;
1551
1552         if (empty($from) || empty($to)) return -1;
1553
1554         if (iil_C_Select($conn, $from)){
1555                 $c=0;
1556
1557                 fputs($fp, "cpy1 COPY $messages \"$to\"\r\n");
1558                 $line=iil_ReadReply($fp);
1559                 return iil_ParseResult($line);
1560         }else{
1561                 return -1;
1562         }
1563 }
1564
1565 function iil_FormatSearchDate($month, $day, $year){
1566         $month = (int)$month;
1567         $months=array(
1568                         1=>"Jan", 2=>"Feb", 3=>"Mar", 4=>"Apr",
1569                         5=>"May", 6=>"Jun", 7=>"Jul", 8=>"Aug",
1570                         9=>"Sep", 10=>"Oct", 11=>"Nov", 12=>"Dec"
1571                         );
1572         return $day."-".$months[$month]."-".$year;
1573 }
1574
1575 function iil_C_CountUnseen(&$conn, $folder){
1576         $index = iil_C_Search($conn, $folder, "ALL UNSEEN");
1577         if (is_array($index)){
1578                 $str = implode(",", $index);
1579                 if (empty($str)) return false;
1580                 else return count($index);
1581         }else return false;
1582 }
1583
1584 function iil_C_UID2ID(&$conn, $folder, $uid){
1585         if ($uid > 0){
1586                 $id_a = iil_C_Search($conn, $folder, "UID $uid");
1587                 if (is_array($id_a)){
1588                         $count = count($id_a);
1589                         if ($count > 1) return false;
1590                         else return $id_a[0];
1591                 }
1592         }
1593         return false;
1594 }
1595
1596 function iil_C_ID2UID(&$conn, $folder, $id){
1597         $fp = $conn->fp;
1598         $result=-1;
1599         if ($id > 0) {
1600                 if (iil_C_Select($conn, $folder)){
1601                         $key = "FUID";
1602                         if (fputs($fp, "$key FETCH $id (UID)\r\n")){
1603                                 do{
1604                                         $line=chop(iil_ReadLine($fp, 1024));
1605                                         if (eregi("^\* $id FETCH \(UID (.*)\)", $line, $r)){
1606                                                 $result = $r[1];
1607                                         }
1608                                 } while (!preg_match("/^$key/", $line));
1609                         }
1610                 }
1611         }
1612         return $result;
1613 }
1614
1615 function iil_C_Search(&$conn, $folder, $criteria){
1616         $fp = $conn->fp;
1617         if (iil_C_Select($conn, $folder)){
1618                 $c=0;
1619
1620                 $query = "srch1 SEARCH ".chop($criteria)."\r\n";
1621                 fputs($fp, $query);
1622                 do{
1623                         $line=trim(chop(iil_ReadLine($fp, 10000)));
1624                         if (eregi("^\* SEARCH", $line)){
1625                                 $str = trim(substr($line, 8));
1626                                 $messages = explode(" ", $str);
1627                         }
1628                 }while(!iil_StartsWith($line, "srch1"));
1629
1630                 $result_code=iil_ParseResult($line);
1631                 if ($result_code==0) return $messages;
1632                 else{
1633                         $conn->error = "iil_C_Search: ".$line."\n";
1634                         return false;
1635                 }
1636
1637         }else{
1638                 $conn->error = "iil_C_Search: Couldn't select \"$folder\"\n";
1639                 return false;
1640         }
1641 }
1642
1643 function iil_C_Move(&$conn, $messages, $from, $to){
1644         $fp = $conn->fp;
1645
1646         if (!$from || !$to) return -1;
1647
1648         $r=iil_C_Copy($conn, $messages, $from,$to);
1649         if ($r==0){
1650                 return iil_C_Delete($conn, $from, $messages);
1651         }else{
1652                 return $r;
1653         }
1654 }
1655
1656 function iil_C_GetHierarchyDelimiter(&$conn){
1657         if ($conn->delimiter) return $conn->delimiter;
1658
1659         $fp = $conn->fp;
1660         $delimiter = false;
1661
1662         //try (LIST "" ""), should return delimiter (RFC2060 Sec 6.3.8)
1663         if (!fputs($fp, "ghd LIST \"\" \"\"\r\n")) return false;
1664         do{
1665                 $line=iil_ReadLine($fp, 500);
1666                 if ($line[0]=="*"){
1667                         $line = rtrim($line);
1668                         $a=iil_ExplodeQuotedString(" ", $line);
1669                         if ($a[0]=="*") $delimiter = str_replace("\"", "", $a[count($a)-2]);
1670                 }
1671         }while (!iil_StartsWith($line, "ghd"));
1672
1673         if (strlen($delimiter)>0) return $delimiter;
1674
1675         //if that fails, try namespace extension
1676         //try to fetch namespace data
1677         fputs($conn->fp, "ns1 NAMESPACE\r\n");
1678         do{
1679                 $line = iil_ReadLine($conn->fp, 1024);
1680                 if (iil_StartsWith($line, "* NAMESPACE")){
1681                         $i = 0;
1682                         $data = iil_ParseNamespace2(substr($line,11), $i, 0, 0);
1683                 }
1684         }while(!iil_StartsWith($line, "ns1"));
1685
1686         if (!is_array($data)) return false;
1687
1688         //extract user space data (opposed to global/shared space)
1689         $user_space_data = $data[0];
1690         if (!is_array($user_space_data)) return false;
1691
1692         //get first element
1693         $first_userspace = $user_space_data[0];
1694         if (!is_array($first_userspace)) return false;
1695
1696         //extract delimiter
1697         $delimiter = $first_userspace[1];
1698
1699         return $delimiter;
1700 }
1701
1702 function iil_C_ListMailboxes(&$conn, $ref, $mailbox){
1703         global $IGNORE_FOLDERS;
1704
1705         $ignore = $IGNORE_FOLDERS[strtolower($conn->host)];
1706
1707         $fp = $conn->fp;
1708         if (empty($mailbox)) $mailbox="*";
1709         if (empty($ref) && $conn->rootdir) $ref = $conn->rootdir;
1710
1711     // send command
1712         if (!fputs($fp, "lmb LIST \"".$ref."\" \"$mailbox\"\r\n")) return false;
1713         $i=0;
1714     // get folder list
1715         do{
1716                 $line=iil_ReadLine($fp, 500);
1717                 $line=iil_MultLine($fp, $line);
1718
1719                 $a = explode(" ", $line);
1720                 if (($line[0]=="*") && ($a[1]=="LIST")){
1721                         $line = rtrim($line);
1722             // split one line
1723                         $a=iil_ExplodeQuotedString(" ", $line);
1724             // last string is folder name
1725                         $folder = str_replace("\"", "", $a[count($a)-1]);
1726             if (empty($ignore) || (!empty($ignore) && !eregi($ignore, $folder))) $folders[$i] = $folder;
1727             // second from last is delimiter
1728             $delim = str_replace("\"", "", $a[count($a)-2]);
1729             // is it a container?
1730             $i++;
1731                 }
1732         }while (!iil_StartsWith($line, "lmb"));
1733
1734         if (is_array($folders)){
1735         if (!empty($ref)){
1736             // if rootdir was specified, make sure it's the first element
1737             // some IMAP servers (i.e. Courier) won't return it
1738             if ($ref[strlen($ref)-1]==$delim) $ref = substr($ref, 0, strlen($ref)-1);
1739             if ($folders[0]!=$ref) array_unshift($folders, $ref);
1740         }
1741         return $folders;
1742         }else if (iil_ParseResult($line)==0){
1743                 return array('INBOX');
1744         }else{
1745                 $conn->error = $line;
1746                 return false;
1747         }
1748 }
1749
1750
1751 function iil_C_ListSubscribed(&$conn, $ref, $mailbox){
1752         global $IGNORE_FOLDERS;
1753
1754         $ignore = $IGNORE_FOLDERS[strtolower($conn->host)];
1755
1756         $fp = $conn->fp;
1757         if (empty($mailbox)) $mailbox = "*";
1758         if (empty($ref) && $conn->rootdir) $ref = $conn->rootdir;
1759         $folders = array();
1760
1761     // send command
1762         if (!fputs($fp, "lsb LSUB \"".$ref."\" \"".$mailbox."\"\r\n")){
1763                 $conn->error = "Couldn't send LSUB command\n";
1764                 return false;
1765         }
1766         $i=0;
1767     // get folder list
1768         do{
1769                 $line=iil_ReadLine($fp, 500);
1770                 $line=iil_MultLine($fp, $line);
1771                 $a = explode(" ", $line);
1772                 if (($line[0]=="*") && ($a[1]=="LSUB" || $a[1]=="LIST")){
1773                         $line = rtrim($line);
1774             // split one line
1775                         $a=iil_ExplodeQuotedString(" ", $line);
1776             // last string is folder name
1777             //$folder = UTF7DecodeString(str_replace("\"", "", $a[count($a)-1]));
1778             $folder = str_replace("\"", "", $a[count($a)-1]);
1779                         if ((!in_array($folder, $folders)) && (empty($ignore) || (!empty($ignore) && !eregi($ignore, $folder)))) $folders[$i] = $folder;
1780             // second from last is delimiter
1781             $delim = str_replace("\"", "", $a[count($a)-2]);
1782             // is it a container?
1783             $i++;
1784                 }
1785         }while (!iil_StartsWith($line, "lsb"));
1786
1787         if (is_array($folders)){
1788         if (!empty($ref)){
1789             // if rootdir was specified, make sure it's the first element
1790             // some IMAP servers (i.e. Courier) won't return it
1791             if ($ref[strlen($ref)-1]==$delim) $ref = substr($ref, 0, strlen($ref)-1);
1792             if ($folders[0]!=$ref) array_unshift($folders, $ref);
1793         }
1794         return $folders;
1795         }else{
1796                 $conn->error = $line;
1797                 return false;
1798         }
1799 }
1800
1801
1802 function iil_C_Subscribe(&$conn, $folder){
1803         $fp = $conn->fp;
1804
1805         $query = "sub1 SUBSCRIBE \"".$folder."\"\r\n";
1806         fputs($fp, $query);
1807         $line=trim(chop(iil_ReadLine($fp, 10000)));
1808         return iil_ParseResult($line);
1809 }
1810
1811
1812 function iil_C_UnSubscribe(&$conn, $folder){
1813         $fp = $conn->fp;
1814
1815         $query = "usub1 UNSUBSCRIBE \"".$folder."\"\r\n";
1816         fputs($fp, $query);
1817         $line=trim(chop(iil_ReadLine($fp, 10000)));
1818         return iil_ParseResult($line);
1819 }
1820
1821
1822 function iil_C_FetchPartHeader(&$conn, $mailbox, $id, $part){
1823         $fp = $conn->fp;
1824         $result=false;
1825         if (($part==0)||(empty($part))) $part="HEADER";
1826         else $part.=".MIME";
1827
1828         if (iil_C_Select($conn, $mailbox)){
1829                 $key="fh".($c++);
1830                 $request=$key." FETCH $id (BODY.PEEK[$part])\r\n";
1831                 if (!fputs($fp, $request)) return false;
1832                 do{
1833                         $line=chop(iil_ReadLine($fp, 200));
1834                         $a=explode(" ", $line);
1835                         if (($line[0]=="*") && ($a[2]=="FETCH") && ($line[strlen($line)-1]!=")")){
1836                                 $line=iil_ReadLine($fp, 300);
1837                                 while(chop($line)!=")"){
1838                                         $result.=$line;
1839                                         $line=iil_ReadLine($fp, 300);
1840                                 }
1841                         }
1842                 }while(strcmp($a[0], $key)!=0);
1843         }
1844
1845         return $result;
1846 }
1847
1848
1849 function iil_C_HandlePartBody(&$conn, $mailbox, $id, $part, $mode){
1850     /* modes:
1851         1: return string
1852         2: print
1853         3: base64 and print
1854     */
1855         $fp = $conn->fp;
1856         $result=false;
1857         if (($part==0)||(empty($part))) $part="TEXT";
1858
1859         if (iil_C_Select($conn, $mailbox)){
1860         $reply_key="* ".$id;
1861         // format request
1862                 $key="ftch".($c++)." ";
1863                 $request=$key."FETCH $id (BODY.PEEK[$part])\r\n";
1864         // send request
1865                 if (!fputs($fp, $request)) return false;
1866         // receive reply line
1867         do{
1868             $line = chop(iil_ReadLine($fp, 1000));
1869             $a = explode(" ", $line);
1870         }while ($a[2]!="FETCH");
1871         $len = strlen($line);
1872         if ($line[$len-1] == ")"){
1873             //one line response, get everything between first and last quotes
1874             $from = strpos($line, "\"") + 1;
1875             $to = strrpos($line, "\"");
1876             $len = $to - $from;
1877             if ($mode==1) $result = substr($line, $from, $len);
1878             else if ($mode==2) echo substr($line, $from, $len);
1879             else if ($mode==3) echo base64_decode(substr($line, $from, $len));
1880         }else if ($line[$len-1] == "}"){
1881             //multi-line request, find sizes of content and receive that many bytes
1882             $from = strpos($line, "{") + 1;
1883             $to = strrpos($line, "}");
1884             $len = $to - $from;
1885             $sizeStr = substr($line, $from, $len);
1886             $bytes = (int)$sizeStr;
1887             $received = 0;
1888             while ($received < $bytes){
1889                 $remaining = $bytes - $received;
1890                 $line = iil_ReadLine($fp, 1024);
1891                 $len = strlen($line);
1892                 if ($len > $remaining) $line = substr($line, 0, $remaining);
1893                 $received += strlen($line);
1894                 if ($mode==1) $result .= chop($line)."\n";
1895                 else if ($mode==2){ echo chop($line)."\n"; flush(); }
1896                 else if ($mode==3){ echo base64_decode($line); flush(); }
1897             }
1898         }
1899         // read in anything up until 'til last line
1900                 do{
1901             $line = iil_ReadLine($fp, 1024);
1902                 }while(!iil_StartsWith($line, $key));
1903
1904         if ($result){
1905                         $result = chop($result);
1906             return $result; // substr($result, 0, strlen($result)-1);
1907         }else return false;
1908         }else{
1909                 echo "Select failed.";
1910         }
1911
1912     if ($mode==1) return $result;
1913     else return $received;
1914 }
1915
1916 function iil_C_FetchPartBody(&$conn, $mailbox, $id, $part){
1917     return iil_C_HandlePartBody($conn, $mailbox, $id, $part, 1);
1918 }
1919
1920 function iil_C_PrintPartBody(&$conn, $mailbox, $id, $part){
1921     iil_C_HandlePartBody($conn, $mailbox, $id, $part, 2);
1922 }
1923
1924 function iil_C_PrintBase64Body(&$conn, $mailbox, $id, $part){
1925     iil_C_HandlePartBody($conn, $mailbox, $id, $part, 3);
1926 }
1927
1928 function iil_C_CreateFolder(&$conn, $folder){
1929         $fp = $conn->fp;
1930         if (fputs($fp, "c CREATE \"".$folder."\"\r\n")){
1931                 do{
1932                         $line=iil_ReadLine($fp, 300);
1933                 }while($line[0]!="c");
1934         $conn->error = $line;
1935                 return (iil_ParseResult($line)==0);
1936         }else{
1937                 return false;
1938         }
1939 }
1940
1941 function iil_C_RenameFolder(&$conn, $from, $to){
1942         $fp = $conn->fp;
1943         if (fputs($fp, "r RENAME \"".$from."\" \"".$to."\"\r\n")){
1944                 do{
1945                         $line=iil_ReadLine($fp, 300);
1946                 }while($line[0]!="r");
1947                 return (iil_ParseResult($line)==0);
1948         }else{
1949                 return false;
1950         }
1951 }
1952
1953 function iil_C_DeleteFolder(&$conn, $folder){
1954         $fp = $conn->fp;
1955         if (fputs($fp, "d DELETE \"".$folder."\"\r\n")){
1956                 do{
1957                         $line=iil_ReadLine($fp, 300);
1958                 }while($line[0]!="d");
1959                 return (iil_ParseResult($line)==0);
1960         }else{
1961                 $conn->error = "Couldn't send command\n";
1962                 return false;
1963         }
1964 }
1965
1966 function iil_C_Append(&$conn, $folder, &$message){
1967         if (!$folder) return false;
1968         $fp = $conn->fp;
1969
1970         $message = str_replace("\r", "", $message);
1971         $message = str_replace("\n", "\r\n", $message);
1972
1973         $len = strlen($message);
1974         if (!$len) return false;
1975
1976         $request="A APPEND \"".$folder."\" (\\Seen) {".$len."}\r\n";
1977         if (fputs($fp, $request)){
1978                 $line=iil_ReadLine($fp, 100);
1979                 $sent = fwrite($fp, $message."\r\n");
1980                 flush();
1981                 do{
1982                         $line=iil_ReadLine($fp, 1000);
1983                 }while($line[0]!="A");
1984
1985                 $result = (iil_ParseResult($line)==0);
1986                 if (!$result) $conn->error .= $line."\n";
1987                 return $result;
1988
1989         }else{
1990                 $conn->error .= "Couldn't send command \"$request\"\n";
1991                 return false;
1992         }
1993 }
1994
1995
1996 function iil_C_AppendFromFile(&$conn, $folder, $path){
1997         if (!$folder) return false;
1998
1999         //open message file
2000         $in_fp = false;
2001         if (file_exists(realpath($path))) $in_fp = fopen($path, "r");
2002         if (!$in_fp){
2003                 $conn->error .= "Couldn't open $path for reading\n";
2004                 return false;
2005         }
2006
2007         $fp = $conn->fp;
2008         $len = filesize($path);
2009         if (!$len) return false;
2010
2011         //send APPEND command
2012         $request="A APPEND \"".$folder."\" (\\Seen) {".$len."}\r\n";
2013         $bytes_sent = 0;
2014         if (fputs($fp, $request)){
2015                 $line=iil_ReadLine($fp, 100);
2016
2017                 //send file
2018                 while(!feof($in_fp)){
2019                         $buffer = fgets($in_fp, 4096);
2020                         $bytes_sent += strlen($buffer);
2021                         fputs($fp, $buffer);
2022                 }
2023                 fclose($in_fp);
2024
2025                 fputs($fp, "\r\n");
2026
2027                 //read response
2028                 do{
2029                         $line=iil_ReadLine($fp, 1000);
2030                 }while($line[0]!="A");
2031
2032                 $result = (iil_ParseResult($line)==0);
2033                 if (!$result) $conn->error .= $line."\n";
2034                 return $result;
2035
2036         }else{
2037                 $conn->error .= "Couldn't send command \"$request\"\n";
2038                 return false;
2039         }
2040 }
2041
2042
2043 function iil_C_FetchStructureString(&$conn, $folder, $id){
2044         $fp = $conn->fp;
2045         $result=false;
2046         if (iil_C_Select($conn, $folder)){
2047                 $key = "F1247";
2048                 if (fputs($fp, "$key FETCH $id (BODYSTRUCTURE)\r\n")){
2049                         do{
2050                                 $line=chop(iil_ReadLine($fp, 5000));
2051                                 if ($line[0]=="*"){
2052                                         if (ereg("\}$", $line)){
2053                                                 preg_match('/(.+)\{([0-9]+)\}/', $line, $match);
2054                                                 $result = $match[1];
2055                                                 do{
2056                                                         $line = chop(iil_ReadLine($fp, 100));
2057                                                         if (!preg_match("/^$key/", $line)) $result .= $line;
2058                                                         else $done = true;
2059                                                 }while(!$done);
2060                                         }else{
2061                                                 $result = $line;
2062                                         }
2063                                         list($pre, $post) = explode("BODYSTRUCTURE ", $result);
2064                                         $result = substr($post, 0, strlen($post)-1);            //truncate last ')' and return
2065                                 }
2066                         }while (!preg_match("/^$key/",$line));
2067                 }
2068         }
2069         return $result;
2070 }
2071
2072 function iil_C_PrintSource(&$conn, $folder, $id, $part){
2073         $header = iil_C_FetchPartHeader($conn, $folder, $id, $part);
2074         //echo str_replace("\r", "", $header);
2075         echo $header;
2076         echo iil_C_PrintPartBody($conn, $folder, $id, $part);
2077 }
2078
2079 function iil_C_GetQuota(&$conn){
2080 /*
2081 b GETQUOTAROOT "INBOX"
2082 * QUOTAROOT INBOX user/rchijiiwa1
2083 * QUOTA user/rchijiiwa1 (STORAGE 654 9765)
2084 b OK Completed
2085 */
2086         $fp = $conn->fp;
2087         $result=false;
2088         $quota_line = "";
2089
2090         //get line containing quota info
2091         if (fputs($fp, "QUOT1 GETQUOTAROOT \"INBOX\"\r\n")){
2092                 do{
2093                         $line=chop(iil_ReadLine($fp, 5000));
2094                         if (iil_StartsWith($line, "* QUOTA ")) $quota_line = $line;
2095                 }while(!iil_StartsWith($line, "QUOT1"));
2096         }
2097
2098         //return false if not found, parse if found
2099         if (!empty($quota_line)){
2100                 $quota_line = eregi_replace("[()]", "", $quota_line);
2101                 $parts = explode(" ", $quota_line);
2102                 $storage_part = array_search("STORAGE", $parts);
2103                 if ($storage_part>0){
2104                         $result = array();
2105                         $used = $parts[$storage_part+1];
2106                         $total = $parts[$storage_part+2];
2107                         $result["used"] = $used;
2108                         $result["total"] = (empty($total)?"??":$total);
2109                         $result["percent"] = (empty($total)?"??":round(($used/$total)*100));
2110                         $result["free"] = 100 - $result["percent"];
2111                 }
2112         }
2113
2114         return $result;
2115 }
2116
2117
2118 function iil_C_ClearFolder(&$conn, $folder){
2119         $num_in_trash = iil_C_CountMessages($conn, $folder);
2120         if ($num_in_trash > 0) iil_C_Delete($conn, $folder, "1:".$num_in_trash);
2121         return (iil_C_Expunge($conn, $folder) >= 0);
2122 }
2123
2124 ?>