functions/imap_mailbox.php

   1 <?php
   2
   3 /**
   4  * imap_mailbox.php
   5  *
   6  * This implements all functions that manipulate mailboxes
   7  *
   8  * @copyright &copy; 1999-2006 The SquirrelMail Project Team
   9  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  10  * @version $Id$
  11  * @package squirrelmail
  12  * @subpackage imap
  13  */
  14
  15 /** UTF7 support */
  16 require_once(SM_PATH . 'functions/imap_utf7_local.php');
  17
  18
  19 /**
  20  * Mailboxes class
  21  *
  22  * FIXME. This class should be extracted and placed in a separate file that
  23  * can be included before we start the session. That makes caching of the tree
  24  * possible. On a refresh mailboxes from left_main.php the only function that
  25  * should be called is the sqimap_get_status_mbx_tree. In case of subscribe
  26  * / rename / delete / new we have to create methods for adding/changing the
  27  * mailbox in the mbx_tree without the need for a refresh.
  28  *
  29  * Some code fragments are present in 1.3.0 - 1.4.4.
  30  * @package squirrelmail
  31  * @subpackage imap
  32  * @since 1.5.0
  33  */
  34 class mailboxes {
  35     var $mailboxname_full = '', $mailboxname_sub= '', $is_noselect = false, $is_noinferiors = false,
  36         $is_special = false, $is_root = false, $is_inbox = false, $is_sent = false,
  37         $is_trash = false, $is_draft = false,  $mbxs = array(),
  38         $unseen = false, $total = false, $recent = false;
  39
  40     function addMbx($mbx, $delimiter, $start, $specialfirst) {
  41         $ary = explode($delimiter, $mbx->mailboxname_full);
  42         $mbx_parent =& $this;
  43         for ($i = $start, $c = count($ary)-1; $i < $c; $i++) {
  44             $mbx_childs =& $mbx_parent->mbxs;
  45             $found = false;
  46             if ($mbx_childs) {
  47                 foreach ($mbx_childs as $key => $parent) {
  48                     if ($parent->mailboxname_sub == $ary[$i]) {
  49                         $mbx_parent =& $mbx_parent->mbxs[$key];
  50                         $found = true;
  51                         break;
  52                     }
  53                 }
  54             }
  55             if (!$found) {
  56                 $no_select_mbx = new mailboxes();
  57                 if (isset($mbx_parent->mailboxname_full) && $mbx_parent->mailboxname_full != '') {
  58                     $no_select_mbx->mailboxname_full = $mbx_parent->mailboxname_full.$delimiter.$ary[$i];
  59                 } else {
  60                     $no_select_mbx->mailboxname_full = $ary[$i];
  61                 }
  62                 $no_select_mbx->mailboxname_sub = $ary[$i];
  63                 $no_select_mbx->is_noselect = true;
  64                 $mbx_parent->mbxs[] = $no_select_mbx;
  65                 $i--;
  66             }
  67         }
  68         $mbx_parent->mbxs[] = $mbx;
  69         if ($mbx->is_special && $specialfirst) {
  70             usort($mbx_parent->mbxs, 'sortSpecialMbx');
  71         }
  72     }
  73 }
  74
  75 /**
  76  * array callback used for sorting in mailboxes class
  77  * @param object $a
  78  * @param object $b
  79  * @return integer see php strnatcasecmp()
  80  * @since 1.3.0
  81  */
  82 function sortSpecialMbx($a, $b) {
  83     if ($a->is_inbox) {
  84         $acmp = '0'. $a->mailboxname_full;
  85     } else if ($a->is_special) {
  86         $acmp = '1'. $a->mailboxname_full;
  87     } else {
  88         $acmp = '2' . $a->mailboxname_full;
  89     }
  90     if ($b->is_inbox) {
  91         $bcmp = '0'. $b->mailboxname_full;
  92     }else if ($b->is_special) {
  93         $bcmp = '1' . $b->mailboxname_full;
  94     } else {
  95         $bcmp = '2' . $b->mailboxname_full;
  96     }
  97     return strnatcasecmp($acmp, $bcmp);
  98 }
  99
 100 /**
 101  * @param array $ary
 102  * @return array
 103  * @since 1.5.0
 104  */
 105 function compact_mailboxes_response($ary) {
 106     /*
 107      * Workaround for mailboxes returned as literal
 108      * FIXME : Doesn't work if the mailbox name is multiple lines
 109      * (larger then fgets buffer)
 110      */
 111     for ($i = 0, $iCnt=count($ary); $i < $iCnt; $i++) {
 112         if (isset($ary[$i + 1]) && substr($ary[$i], -3) == "}\r\n") {
 113             if (ereg("^(\\* [A-Z]+.*)\\{[0-9]+\\}([ \n\r\t]*)$",
 114                  $ary[$i], $regs)) {
 115                 $ary[$i] = $regs[1] . '"' . addslashes(trim($ary[$i+1])) . '"' . $regs[2];
 116                 array_splice($ary, $i+1, 2);
 117             }
 118         }
 119     }
 120     /* remove duplicates and ensure array is contiguous */
 121     return array_values(array_unique($ary));
 122 }
 123
 124 /**
 125  * Extract the mailbox name from an untagged LIST (7.2.2) or LSUB (7.2.3) answer
 126  * (LIST|LSUB) (<Flags list>) (NIL|"<separator atom>") <mailbox name string>\r\n
 127  * mailbox name in quoted string MUST be unquoted and stripslashed (sm API)
 128  *
 129  * Originally stored in functions/strings.php. Since 1.2.6 stored in
 130  * functions/imap_mailbox.php
 131  * @param string $line imap LIST/LSUB response line
 132  * @return string mailbox name
 133  */
 134 function find_mailbox_name($line) {
 135     if (preg_match('/^\* (?:LIST|LSUB) \([^\)]*\) (?:NIL|\"[^\"]*\") ([^\r\n]*)[\r\n]*$/i', $line, $regs)) {
 136         if (substr($regs[1], 0, 1) == '"')
 137             return stripslashes(substr($regs[1], 1, -1));
 138         return $regs[1];
 139     }
 140     return '';
 141 }
 142
 143 /**
 144  * Detects if mailbox has noselect flag (can't store messages)
 145  * In versions older than 1.4.5 function checks only LSUB responses
 146  * and can produce pcre warnings.
 147  * @param string $lsub_line mailbox line from untagged LIST or LSUB response
 148  * @return bool whether this is a Noselect mailbox.
 149  * @since 1.3.2
 150  */
 151 function check_is_noselect ($lsub_line) {
 152     return preg_match("/^\* (LSUB|LIST) \([^\)]*\\\\Noselect[^\)]*\)/i", $lsub_line);
 153 }
 154
 155 /**
 156  * Detects if mailbox has noinferiors flag (can't store subfolders)
 157  * @param string $lsub_line mailbox line from untagged LIST or LSUB response
 158  * @return bool whether this is a Noinferiors mailbox.
 159  * @since 1.5.0
 160  */
 161 function check_is_noinferiors ($lsub_line) {
 162     return preg_match("/^\* (LSUB|LIST) \([^\)]*\\\\Noinferiors[^\)]*\)/i", $lsub_line);
 163 }
 164
 165 /**
 166  * Detects mailbox's parent folder
 167  *
 168  * If $haystack is a full mailbox name, and $needle is the mailbox
 169  * separator character, returns the second last part of the full
 170  * mailbox name (i.e. the mailbox's parent mailbox)
 171  *
 172  * Originally stored in functions/strings.php. Since 1.2.6 stored in
 173  * functions/imap_mailbox.php
 174  * @param string $haystack full mailbox name
 175  * @param string $needle delimiter
 176  * @return string parent mailbox
 177  */
 178 function readMailboxParent($haystack, $needle) {
 179     if ($needle == '') {
 180         $ret = '';
 181     } else {
 182         $parts = explode($needle, $haystack);
 183         $elem = array_pop($parts);
 184         while ($elem == '' && count($parts)) {
 185             $elem = array_pop($parts);
 186         }
 187         $ret = join($needle, $parts);
 188     }
 189     return( $ret );
 190 }
 191
 192 /**
 193  * Check if $subbox is below the specified $parentbox
 194  * @param string $subbox potential sub folder
 195  * @param string $parentbox potential parent
 196  * @return boolean
 197  * @since 1.2.3
 198  */
 199 function isBoxBelow( $subbox, $parentbox ) {
 200     global $delimiter;
 201     /*
 202      * Eliminate the obvious mismatch, where the
 203      * subfolder path is shorter than that of the potential parent
 204      */
 205     if ( strlen($subbox) < strlen($parentbox) ) {
 206       return false;
 207     }
 208     /* check for delimiter */
 209     if (substr($parentbox,-1) != $delimiter) {
 210         $parentbox .= $delimiter;
 211     }
 212
 213     return (substr($subbox,0,strlen($parentbox)) == $parentbox);
 214 }
 215
 216 /**
 217  * Defines special mailboxes: given a mailbox name, it checks if this is a
 218  * "special" one: INBOX, Trash, Sent or Draft.
 219  *
 220  * Since 1.2.5 function includes special_mailbox hook.<br>
 221  * Since 1.4.3 hook supports more than one plugin.
 222  * @param string $box mailbox name
 223  * @param boolean $include_subs (since 1.5.2) if true, subfolders of system
 224  *  folders are special. if false, subfolders are not special mailboxes
 225  *  unless they are tagged as special in 'special_mailbox' hook.
 226  * @return boolean
 227  * @since 1.2.3
 228  */
 229 function isSpecialMailbox($box,$include_subs=true) {
 230     $ret = ( (strtolower($box) == 'inbox') ||
 231              isTrashMailbox($box,$include_subs) ||
 232              isSentMailbox($box,$include_subs) ||
 233              isDraftMailbox($box,$include_subs) );
 234
 235     if ( !$ret ) {
 236         $ret = boolean_hook_function('special_mailbox', $box, 1);
 237     }
 238     return $ret;
 239 }
 240
 241 /**
 242  * Detects if mailbox is a Trash folder or subfolder of Trash
 243  * @param string $box mailbox name
 244  * @param boolean $include_subs (since 1.5.2) if true, subfolders of system
 245  *  folders are special. if false, subfolders are not special mailboxes.
 246  * @return bool whether this is a Trash folder
 247  * @since 1.4.0
 248  */
 249 function isTrashMailbox ($box,$include_subs=true) {
 250     global $trash_folder, $move_to_trash;
 251     return $move_to_trash && $trash_folder &&
 252            ( $box == $trash_folder ||
 253              ($include_subs && isBoxBelow($box, $trash_folder)) );
 254 }
 255
 256 /**
 257  * Detects if mailbox is a Sent folder or subfolder of Sent
 258  * @param string $box mailbox name
 259  * @param boolean $include_subs (since 1.5.2) if true, subfolders of system
 260  *  folders are special. if false, subfolders are not special mailboxes.
 261  * @return bool whether this is a Sent folder
 262  * @since 1.4.0
 263  */
 264 function isSentMailbox($box,$include_subs=true) {
 265    global $sent_folder, $move_to_sent;
 266    return $move_to_sent && $sent_folder &&
 267           ( $box == $sent_folder ||
 268             ($include_subs && isBoxBelow($box, $sent_folder)) );
 269 }
 270
 271 /**
 272  * Detects if mailbox is a Drafts folder or subfolder of Drafts
 273  * @param string $box mailbox name
 274  * @param boolean $include_subs (since 1.5.2) if true, subfolders of system
 275  *  folders are special. if false, subfolders are not special mailboxes.
 276  * @return bool whether this is a Draft folder
 277  * @since 1.4.0
 278  */
 279 function isDraftMailbox($box,$include_subs=true) {
 280    global $draft_folder, $save_as_draft;
 281    return $save_as_draft &&
 282           ( $box == $draft_folder ||
 283             ($include_subs && isBoxBelow($box, $draft_folder)) );
 284 }
 285
 286 /**
 287  * Expunges a mailbox
 288  *
 289  * WARNING: Select mailbox before calling this function.
 290  *
 291  * permanently removes all messages that have the \Deleted flag
 292  * set from the selected mailbox. See EXPUNGE command chapter in
 293  * IMAP RFC.
 294  * @param stream $imap_stream imap connection resource
 295  * @param string $mailbox mailbox name (unused since 1.1.3).
 296  * @param boolean $handle_errors error handling control (displays error_box on error).
 297  * @param mixed $id (since 1.3.0) integer message id or array with integer ids
 298  * @return integer number of expunged messages
 299  * @since 1.0 or older
 300  */
 301 function sqimap_mailbox_expunge ($imap_stream, $mailbox, $handle_errors = true, $id='') {
 302     if ($id) {
 303         if (is_array($id)) {
 304             $id = sqimap_message_list_squisher($id);
 305         }
 306         $id = ' '.$id;
 307         $uid = TRUE;
 308     } else {
 309         $uid = false;
 310     }
 311     $read = sqimap_run_command($imap_stream, 'EXPUNGE'.$id, $handle_errors,
 312                                $response, $message, $uid);
 313     $cnt = 0;
 314
 315     if (is_array($read)) {
 316         foreach ($read as $r) {
 317             if (preg_match('/^\*\s[0-9]+\sEXPUNGE/AUi',$r,$regs)) {
 318                 $cnt++;
 319             }
 320         }
 321     }
 322     return $cnt;
 323 }
 324
 325 /**
 326  * Checks whether or not the specified mailbox exists
 327  *
 328  * @param stream $imap_stream imap connection resource
 329  * @param string $mailbox mailbox name
 330  * @param array $mailboxlist (since 1.5.1) optional array of mailboxes from
 331  *  sqimap_get_mailboxes() (to avoid having to talk to imap server)
 332  * @return boolean
 333  * @since 1.0 or older
 334  */
 335 function sqimap_mailbox_exists ($imap_stream, $mailbox, $mailboxlist=null) {
 336     if (!isset($mailbox) || empty($mailbox)) {
 337         return false;
 338     }
 339
 340     if (is_array($mailboxlist)) {
 341         // use previously retrieved mailbox list
 342         foreach ($mailboxlist as $mbox) {
 343             if ($mbox['unformatted-dm'] == $mailbox) { return true; }
 344         }
 345         return false;
 346     } else {
 347         // go to imap server
 348         $mbx = sqimap_run_command($imap_stream, 'LIST "" ' . sqimap_encode_mailbox_name($mailbox),
 349                                   true, $response, $message);
 350         return isset($mbx[0]);
 351     }
 352 }
 353
 354 /**
 355  * Selects a mailbox
 356  * Before 1.3.0 used more arguments and returned data depended on those arguments.
 357  * @param stream $imap_stream imap connection resource
 358  * @param string $mailbox mailbox name
 359  * @return array results of select command (on success - permanentflags, flags and rights)
 360  * @since 1.0 or older
 361  */
 362 function sqimap_mailbox_select ($imap_stream, $mailbox) {
 363     // FIX ME: WHAAAA DO NOT USE "None" for something that does not exist. Use false or NULL instead
 364     if ($mailbox == 'None') {
 365         return;
 366     }
 367
 368     // cleanup $mailbox in order to prevent IMAP injection attacks
 369     $mailbox = str_replace(array("\r","\n"), array("",""),$mailbox);
 370
 371     /**
 372      * Default UW IMAP server configuration allows to access other files
 373      * on server. $imap_server_type is not checked because interface can
 374      * be used with 'other' or any other server type setting. $mailbox
 375      * variable can be modified in any script that uses variable from GET
 376      * or POST. This code blocks all standard SquirrelMail IMAP API requests
 377      * that use mailbox with full path (/etc/passwd) or with ../ characters
 378      * in path (../../etc/passwd)
 379      */
 380     if (strstr($mailbox, '../') || substr($mailbox, 0, 1) == '/') {
 381         global $oTemplate;
 382         error_box(sprintf(_("Invalid mailbox name: %s"),htmlspecialchars($mailbox)));
 383         sqimap_logout($imap_stream);
 384         $oTemplate->display('footer.tpl');
 385         die();
 386     }
 387
 388     $read = sqimap_run_command($imap_stream, 'SELECT ' . sqimap_encode_mailbox_name($mailbox),
 389                                true, $response, $message);
 390     $result = array();
 391     for ($i = 0, $cnt = count($read); $i < $cnt; $i++) {
 392         if (preg_match('/^\*\s+OK\s\[(\w+)\s(\w+)\]/',$read[$i], $regs)) {
 393             $result[strtoupper($regs[1])] = $regs[2];
 394         } else if (preg_match('/^\*\s([0-9]+)\s(\w+)/',$read[$i], $regs)) {
 395             $result[strtoupper($regs[2])] = $regs[1];
 396         } else {
 397             if (preg_match("/PERMANENTFLAGS(.*)/i",$read[$i], $regs)) {
 398                 $regs[1]=trim(preg_replace (  array ("/\(/","/\)/","/\]/") ,'', $regs[1])) ;
 399                 $result['PERMANENTFLAGS'] = explode(' ',strtolower($regs[1]));
 400             } else if (preg_match("/FLAGS(.*)/i",$read[$i], $regs)) {
 401                 $regs[1]=trim(preg_replace (  array ("/\(/","/\)/") ,'', $regs[1])) ;
 402                 $result['FLAGS'] = explode(' ',strtolower($regs[1]));
 403             }
 404         }
 405     }
 406     if (!isset($result['PERMANENTFLAGS'])) {
 407         $result['PERMANENTFLAGS'] = $result['FLAGS'];
 408     }
 409     if (preg_match('/^\[(.+)\]/',$message, $regs)) {
 410         $result['RIGHTS']=strtoupper($regs[1]);
 411     }
 412
 413     return $result;
 414 }
 415
 416 /**
 417  * Creates a folder.
 418  *
 419  * Mailbox is automatically subscribed.
 420  *
 421  * Set $type to string that does not match 'noselect' (case insensitive),
 422  * if you don't want to prepend delimiter to mailbox name. Please note
 423  * that 'noinferiors' might be used someday as keyword for folders
 424  * that store only messages.
 425  * @param stream $imap_steam imap connection resource
 426  * @param string $mailbox mailbox name
 427  * @param string $type folder type.
 428  * @since 1.0 or older
 429  */
 430 function sqimap_mailbox_create ($imap_stream, $mailbox, $type) {
 431     global $delimiter;
 432     if (strtolower($type) == 'noselect') {
 433         $create_mailbox = $mailbox . $delimiter;
 434     } else {
 435         $create_mailbox = $mailbox;
 436     }
 437
 438     $read_ary = sqimap_run_command($imap_stream, 'CREATE ' .
 439                                    sqimap_encode_mailbox_name($create_mailbox),
 440                                    true, $response, $message);
 441     sqimap_subscribe ($imap_stream, $mailbox);
 442 }
 443
 444 /**
 445  * Subscribes to an existing folder.
 446  * @param stream $imap_stream imap connection resource
 447  * @param string $mailbox mailbox name
 448  * @param boolean $debug (since 1.5.1)
 449  * @since 1.0 or older
 450  */
 451 function sqimap_subscribe ($imap_stream, $mailbox,$debug=true) {
 452     $read_ary = sqimap_run_command($imap_stream, 'SUBSCRIBE ' .
 453                                    sqimap_encode_mailbox_name($mailbox),
 454                                    $debug, $response, $message);
 455 }
 456
 457 /**
 458  * Unsubscribes from an existing folder
 459  * @param stream $imap_stream imap connection resource
 460  * @param string $mailbox mailbox name
 461  * @since 1.0 or older
 462  */
 463 function sqimap_unsubscribe ($imap_stream, $mailbox) {
 464     $read_ary = sqimap_run_command($imap_stream, 'UNSUBSCRIBE ' .
 465                                    sqimap_encode_mailbox_name($mailbox),
 466                                    false, $response, $message);
 467 }
 468
 469 /**
 470  * Deletes the given folder
 471  * Since 1.2.6 and 1.3.0 contains rename_or_delete_folder hook
 472  * @param stream $imap_stream imap connection resource
 473  * @param string $mailbox mailbox name
 474  * @since 1.0 or older
 475  */
 476 function sqimap_mailbox_delete ($imap_stream, $mailbox) {
 477     global $data_dir, $username;
 478     sqimap_unsubscribe ($imap_stream, $mailbox);
 479
 480     if (sqimap_mailbox_exists($imap_stream, $mailbox)) {
 481
 482         $read_ary = sqimap_run_command($imap_stream, 'DELETE ' .
 483                                        sqimap_encode_mailbox_name($mailbox),
 484                                        true, $response, $message);
 485         if ($response !== 'OK') {
 486             // subscribe again
 487             sqimap_subscribe ($imap_stream, $mailbox);
 488         } else {
 489             do_hook('rename_or_delete_folder', $temp=array(&$mailbox, 'delete', ''));
 490             removePref($data_dir, $username, "thread_$mailbox");
 491             removePref($data_dir, $username, "collapse_folder_$mailbox");
 492         }
 493     }
 494 }
 495
 496 /**
 497  * Determines if the user is subscribed to the folder or not
 498  * @param stream $imap_stream imap connection resource
 499  * @param string $mailbox mailbox name
 500  * @return boolean
 501  * @since 1.2.0
 502  */
 503 function sqimap_mailbox_is_subscribed($imap_stream, $folder) {
 504     $boxesall = sqimap_mailbox_list ($imap_stream);
 505     foreach ($boxesall as $ref) {
 506         if ($ref['unformatted'] == $folder) {
 507             return true;
 508         }
 509     }
 510     return false;
 511 }
 512
 513 /**
 514  * Renames a mailbox.
 515  * Since 1.2.6 and 1.3.0 contains rename_or_delete_folder hook
 516  * @param stream $imap_stream imap connection resource
 517  * @param string $old_name mailbox name
 518  * @param string $new_name new mailbox name
 519  * @since 1.2.3
 520  */
 521 function sqimap_mailbox_rename( $imap_stream, $old_name, $new_name ) {
 522     if ( $old_name != $new_name ) {
 523         global $delimiter, $imap_server_type, $data_dir, $username;
 524         if ( substr( $old_name, -1 ) == $delimiter  ) {
 525             $old_name = substr( $old_name, 0, strlen( $old_name ) - 1 );
 526             $new_name = substr( $new_name, 0, strlen( $new_name ) - 1 );
 527             $postfix = $delimiter;
 528         } else {
 529             $postfix = '';
 530         }
 531
 532         $boxesall = sqimap_mailbox_list_all($imap_stream);
 533         $cmd = 'RENAME ' . sqimap_encode_mailbox_name($old_name) .
 534                      ' ' . sqimap_encode_mailbox_name($new_name);
 535         $data = sqimap_run_command($imap_stream, $cmd, true, $response, $message);
 536         sqimap_unsubscribe($imap_stream, $old_name.$postfix);
 537         $oldpref_thread = getPref($data_dir, $username, 'thread_'.$old_name.$postfix);
 538         $oldpref_collapse = getPref($data_dir, $username, 'collapse_folder_'.$old_name.$postfix);
 539         removePref($data_dir, $username, 'thread_'.$old_name.$postfix);
 540         removePref($data_dir, $username, 'collapse_folder_'.$old_name.$postfix);
 541         sqimap_subscribe($imap_stream, $new_name.$postfix);
 542         setPref($data_dir, $username, 'thread_'.$new_name.$postfix, $oldpref_thread);
 543         setPref($data_dir, $username, 'collapse_folder_'.$new_name.$postfix, $oldpref_collapse);
 544         do_hook('rename_or_delete_folder', $temp=array(&$old_name, 'rename', &$new_name));
 545         $l = strlen( $old_name ) + 1;
 546         $p = 'unformatted';
 547
 548         foreach ($boxesall as $box) {
 549             if (substr($box[$p], 0, $l) == $old_name . $delimiter) {
 550                 $new_sub = $new_name . $delimiter . substr($box[$p], $l);
 551                 /* With Cyrus IMAPd >= 2.0 rename is recursive, so don't check for errors here */
 552                 if ($imap_server_type == 'cyrus') {
 553                     $cmd = 'RENAME "' . $box[$p] . '" "' . $new_sub . '"';
 554                     $data = sqimap_run_command($imap_stream, $cmd, false,
 555                                                $response, $message);
 556                 }
 557                 $was_subscribed = sqimap_mailbox_is_subscribed($imap_stream, $box[$p]);
 558                 if ( $was_subscribed ) {
 559                     sqimap_unsubscribe($imap_stream, $box[$p]);
 560                 }
 561                 $oldpref_thread = getPref($data_dir, $username, 'thread_'.$box[$p]);
 562                 $oldpref_collapse = getPref($data_dir, $username, 'collapse_folder_'.$box[$p]);
 563                 removePref($data_dir, $username, 'thread_'.$box[$p]);
 564                 removePref($data_dir, $username, 'collapse_folder_'.$box[$p]);
 565                 if ( $was_subscribed ) {
 566                     sqimap_subscribe($imap_stream, $new_sub);
 567                 }
 568                 setPref($data_dir, $username, 'thread_'.$new_sub, $oldpref_thread);
 569                 setPref($data_dir, $username, 'collapse_folder_'.$new_sub, $oldpref_collapse);
 570                 do_hook('rename_or_delete_folder', $temp=array(&$box[$p], 'rename', &$new_sub));
 571             }
 572         }
 573     }
 574 }
 575
 576 /**
 577  * Formats a mailbox into parts for the $boxesall array
 578  *
 579  * The parts are:
 580  * <ul>
 581  *   <li>raw            - Raw LIST/LSUB response from the IMAP server
 582  *   <li>formatted      - nicely formatted folder name
 583  *   <li>unformatted    - unformatted, but with delimiter at end removed
 584  *   <li>unformatted-dm - folder name as it appears in raw response
 585  *   <li>unformatted-disp - unformatted without $folder_prefix
 586  *   <li>id             - TODO: document me
 587  *   <li>flags          - TODO: document me
 588  * </ul>
 589  * Before 1.2.0 used third argument for delimiter.
 590  *
 591  * Before 1.5.1 used second argument for lsub line. Argument was removed in order to use
 592  * find_mailbox_name() on the raw input. Since 1.5.1 includes RFC3501 names in flags
 593  * array (for example, "\NoSelect" in addition to "noselect")
 594  * @param array $line
 595  * @return array
 596  * @since 1.0 or older
 597  * @todo document id and flags keys in boxes array and function arguments.
 598  */
 599 function sqimap_mailbox_parse ($line) {
 600     global $folder_prefix, $delimiter;
 601
 602     /* Process each folder line */
 603     for ($g = 0, $cnt = count($line); $g < $cnt; ++$g) {
 604         /* Store the raw IMAP reply */
 605         if (isset($line[$g])) {
 606             $boxesall[$g]['raw'] = $line[$g];
 607         } else {
 608             $boxesall[$g]['raw'] = '';
 609         }
 610
 611         /* Count number of delimiters ($delimiter) in folder name */
 612         $mailbox = find_mailbox_name($line[$g]);
 613         $dm_count = substr_count($mailbox, $delimiter);
 614         if (substr($mailbox, -1) == $delimiter) {
 615             /* If name ends in delimiter, decrement count by one */
 616             $dm_count--;
 617         }
 618
 619         /* Format folder name, but only if it's a INBOX.* or has a parent. */
 620         $boxesallbyname[$mailbox] = $g;
 621         $parentfolder = readMailboxParent($mailbox, $delimiter);
 622         if ( (strtolower(substr($mailbox, 0, 5)) == "inbox") ||
 623              (substr($mailbox, 0, strlen($folder_prefix)) == $folder_prefix) ||
 624              (isset($boxesallbyname[$parentfolder]) &&
 625               (strlen($parentfolder) > 0) ) ) {
 626             $indent = $dm_count - (substr_count($folder_prefix, $delimiter));
 627             if ($indent > 0) {
 628                 $boxesall[$g]['formatted'] = str_repeat('&nbsp;&nbsp;', $indent);
 629             } else {
 630                 $boxesall[$g]['formatted'] = '';
 631             }
 632             $boxesall[$g]['formatted'] .= imap_utf7_decode_local(readShortMailboxName($mailbox, $delimiter));
 633         } else {
 634             $boxesall[$g]['formatted']  = imap_utf7_decode_local($mailbox);
 635         }
 636
 637         $boxesall[$g]['unformatted-dm'] = $mailbox;
 638         if (substr($mailbox, -1) == $delimiter) {
 639             $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 640         }
 641         $boxesall[$g]['unformatted'] = $mailbox;
 642         if (substr($mailbox,0,strlen($folder_prefix))==$folder_prefix) {
 643             $mailbox = substr($mailbox, strlen($folder_prefix));
 644         }
 645         $boxesall[$g]['unformatted-disp'] = $mailbox;
 646         $boxesall[$g]['id'] = $g;
 647
 648         $boxesall[$g]['flags'] = array();
 649         if (isset($line[$g])) {
 650             ereg("\(([^)]*)\)",$line[$g],$regs);
 651             /**
 652              * Since 1.5.1 flags are stored with RFC3501 naming
 653              * and also the old way for backwards compatibility
 654              * so for example "\NoSelect" and "noselect"
 655              */
 656             $flags = trim($regs[1]);
 657             if ($flags) {
 658                 $flagsarr = explode(' ',$flags);
 659                 $flagsarrnew=$flagsarr;
 660                 // add old type
 661                 foreach ($flagsarr as $flag) {
 662                     $flagsarrnew[]=strtolower(str_replace('\\', '',$flag));
 663                 }
 664                 $boxesall[$g]['flags']=$flagsarrnew;
 665             }
 666         }
 667     }
 668     return $boxesall;
 669 }
 670
 671 /**
 672  * Returns an array of mailboxes available.  Separated from sqimap_mailbox_option_list()
 673  * below for template development.
 674  *
 675  * @author Steve Brown
 676  * @since 1.5.2
 677  */
 678 function sqimap_mailbox_option_array($imap_stream, $folder_skip = 0, $boxes = 0,
 679                                     $flag = 'noselect', $use_long_format = false ) {
 680     global $username, $data_dir, $translate_special_folders, $sent_folder,
 681         $trash_folder, $draft_folder;
 682
 683     $delimiter = sqimap_get_delimiter($imap_stream);
 684
 685     $mbox_options = '';
 686     if ( $use_long_format ) {
 687         $shorten_box_names = 0;
 688     } else {
 689         $shorten_box_names = getPref($data_dir, $username, 'mailbox_select_style', SMPREF_OFF);
 690     }
 691
 692     if ($boxes == 0) {
 693         $boxes = sqimap_mailbox_list($imap_stream);
 694     }
 695
 696     $a = array();
 697     foreach ($boxes as $boxes_part) {
 698         if ($flag == NULL || (is_array($boxes_part['flags'])
 699                       && !in_array($flag, $boxes_part['flags']))) {
 700             $box = $boxes_part['unformatted'];
 701
 702             if ($folder_skip != 0 && in_array($box, $folder_skip) ) {
 703                 continue;
 704             }
 705             $lowerbox = strtolower($box);
 706             // mailboxes are casesensitive => inbox.sent != inbox.Sent
 707             // nevermind, to many dependencies this should be fixed!
 708
 709             if (strtolower($box) == 'inbox') { // inbox is special and not casesensitive
 710                 $box2 = _("INBOX");
 711             } else {
 712                 switch ($shorten_box_names)
 713                 {
 714                   case 2:   /* delimited, style = 2 */
 715                       if ($translate_special_folders && $boxes_part['unformatted-dm']==$sent_folder) {
 716                           /*
 717                            * calculate pad level from number of delimiters. do it inside if control in order
 718                            * to reduce number of calculations. Other folders don't need it.
 719                            */
 720                           $pad = str_pad('',7 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'.&nbsp;');
 721                           // i18n: Name of Sent folder
 722                           $box2 = $pad . _("Sent");
 723                       } elseif ($translate_special_folders && $boxes_part['unformatted-dm']==$trash_folder) {
 724                           $pad = str_pad('',7 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'.&nbsp;');
 725                           // i18n: Name of Trash folder
 726                           $box2 = $pad . _("Trash");
 727                       } elseif ($translate_special_folders && $boxes_part['unformatted-dm']==$draft_folder) {
 728                           $pad = str_pad('',7 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'.&nbsp;');
 729                           // i18n: Name of Drafts folder
 730                           $box2 = $pad . _("Drafts");
 731                       } else {
 732                           $box2 = str_replace('&amp;nbsp;&amp;nbsp;', '.&nbsp;', htmlspecialchars($boxes_part['formatted']));
 733                       }
 734                     break;
 735                   case 1:   /* indent, style = 1 */
 736                       if ($translate_special_folders && $boxes_part['unformatted-dm']==$sent_folder) {
 737                           $pad = str_pad('',12 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'&nbsp;&nbsp;');
 738                           $box2 = $pad . _("Sent");
 739                       } elseif ($translate_special_folders && $boxes_part['unformatted-dm']==$trash_folder) {
 740                           $pad = str_pad('',12 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'&nbsp;&nbsp;');
 741                           $box2 = $pad . _("Trash");
 742                       } elseif ($translate_special_folders && $boxes_part['unformatted-dm']==$draft_folder) {
 743                           $pad = str_pad('',12 * (count(explode($delimiter,$boxes_part['unformatted-dm']))-1),'&nbsp;&nbsp;');
 744                           $box2 = $pad . _("Drafts");
 745                       } else {
 746                           $box2 = str_replace('&amp;nbsp;&amp;nbsp;', '&nbsp;&nbsp;', htmlspecialchars($boxes_part['formatted']));
 747                       }
 748                     break;
 749                   default:  /* default, long names, style = 0 */
 750                     $box2 = str_replace(' ', '&nbsp;', htmlspecialchars(imap_utf7_decode_local($boxes_part['unformatted-disp'])));
 751                     break;
 752                 }
 753             }
 754
 755             $a[htmlspecialchars($box)] = $box2;
 756         }
 757     }
 758
 759     return $a;
 760 }
 761
 762 /**
 763  * Returns list of options (to be echoed into select statement
 764  * based on available mailboxes and separators
 765  * Caller should surround options with <select ...> </select> and
 766  * any formatting.
 767  * @param stream $imap_stream imap connection resource to query for mailboxes
 768  * @param array $show_selected array containing list of mailboxes to pre-select (0 if none)
 769  * @param array $folder_skip array of folders to keep out of option list (compared in lower)
 770  * @param $boxes list of already fetched boxes (for places like folder panel, where
 771  *            you know these options will be shown 3 times in a row.. (most often unset).
 772  * @param string $flag (since 1.4.1) flag to check for in mailbox flags, used to filter out mailboxes.
 773  *           'noselect' by default to remove unselectable mailboxes.
 774  *           'noinferiors' used to filter out folders that can not contain subfolders.
 775  *           NULL to avoid flag check entirely.
 776  *           NOTE: noselect and noiferiors are used internally. The IMAP representation is
 777  *                 \NoSelect and \NoInferiors
 778  * @param boolean $use_long_format (since 1.4.1) override folder display preference and always show full folder name.
 779  * @return string html formated mailbox selection options
 780  * @since 1.3.2
 781  */
 782 function sqimap_mailbox_option_list($imap_stream, $show_selected = 0, $folder_skip = 0, $boxes = 0,
 783                                     $flag = 'noselect', $use_long_format = false ) {
 784     global $username, $data_dir, $translate_special_folders, $sent_folder,
 785         $trash_folder, $draft_folder;
 786
 787     $boxes = sqimap_mailbox_option_array($imap_stream, $folder_skip, $boxes, $flag, $use_long_format);
 788
 789     $str = '';
 790     foreach ($boxes as $value=>$option) {
 791         $lowerbox = strtolower(htmlspecialchars($value));
 792         $sel = false;
 793         if ($show_selected != 0) {
 794             reset($show_selected);
 795             while (!$sel && (list($x, $val) = each($show_selected))) {
 796                 if (strtolower($value) == strtolower(htmlspecialchars($val))) {
 797                     $sel = true;
 798                 }
 799             }
 800         }
 801
 802         $str .= '<option value="'. $value .'"'. ($sel ? ' selected="selected"' : '').'>'. $option ."</option>\n";
 803     }
 804
 805     return $str;
 806 }
 807
 808 /**
 809  * Returns sorted mailbox lists in several different ways.
 810  *
 811  * Since 1.5.1 most of the functionality has been moved to new function sqimap_get_mailboxes
 812  *
 813  * See comment on sqimap_mailbox_parse() for info about the returned array.
 814  * @param resource $imap_stream imap connection resource
 815  * @param boolean $force force update of mailbox listing. available since 1.4.2 and 1.5.0
 816  * @return array list of mailboxes
 817  * @since 1.0 or older
 818  */
 819 function sqimap_mailbox_list($imap_stream, $force=false) {
 820     global $boxesnew,$show_only_subscribed_folders;
 821     if (!sqgetGlobalVar('boxesnew',$boxesnew,SQ_SESSION) || $force) {
 822         $boxesnew=sqimap_get_mailboxes($imap_stream,$force,$show_only_subscribed_folders);
 823     }
 824     return $boxesnew;
 825 }
 826
 827 /**
 828  * Returns a list of all folders, subscribed or not
 829  *
 830  * Since 1.5.1 code moved to sqimap_get_mailboxes()
 831  *
 832  * @param stream $imap_stream imap connection resource
 833  * @return array see sqimap_mailbox_parse()
 834  * @since 1.0 or older
 835  */
 836 function sqimap_mailbox_list_all($imap_stream) {
 837     global $show_only_subscribed_folders;
 838     // fourth argument prevents registration of retrieved list of mailboxes in session
 839     $boxes=sqimap_get_mailboxes($imap_stream,true,false,false);
 840     return $boxes;
 841 }
 842
 843
 844 /**
 845  * Gets the list of mailboxes for sqimap_maolbox_tree and sqimap_mailbox_list
 846  *
 847  * This is because both of those functions had duplicated logic, but with slightly different
 848  * implementations. This will make both use the same implementation, which should make it
 849  * easier to maintain and easier to modify in the future
 850  * @param stream $imap_stream imap connection resource
 851  * @param bool $force force a reload and ignore cache
 852  * @param bool $show_only_subscribed controls listing of visible or all folders
 853  * @param bool $session_register controls registration of retrieved data in session.
 854  * @return object boxesnew - array of mailboxes and their attributes
 855  * @since 1.5.1
 856  */
 857 function sqimap_get_mailboxes($imap_stream,$force=false,$show_only_subscribed=true,$session_register=true) {
 858     global    $show_only_subscribed_folders,$noselect_fix_enable,$folder_prefix,
 859             $list_special_folders_first,$imap_server_type;
 860     $inbox_subscribed = false;
 861     $listsubscribed = sqimap_capability($imap_stream,'LIST-SUBSCRIBED');
 862
 863     if ($show_only_subscribed) { $show_only_subscribed=$show_only_subscribed_folders; }
 864
 865     //require_once(SM_PATH . 'include/load_prefs.php');
 866
 867     /**
 868      * There are three main listing commands we can use in IMAP:
 869      * LSUB        shows just the list of subscribed folders
 870      *            may include flags, but these are not necessarily accurate or authoratative
 871      *            \NoSelect has special meaning: the folder does not exist -OR- it means this
 872      *            folder is not subscribed but children may be
 873      *            [RFC-2060]
 874      * LIST        this shows every mailbox on the system
 875      *            flags are always included and are accurate and authoratative
 876      *            \NoSelect means folder should not be selected
 877      *            [RFC-2060]
 878      * LIST (SUBSCRIBED)    implemented with LIST-SUBSCRIBED extension
 879      *            this is like list but returns only subscribed folders
 880      *            flag meanings are like LIST, not LSUB
 881      *            \NonExistent means mailbox doesn't exist
 882      *            \PlaceHolder means parent is not valid (selectable), but one or more children are
 883      *            \NoSelect indeed means that the folder should not be selected
 884      *            IMAPEXT-LIST-EXTENSIONS-04 August 2003 B. Leiba
 885      */
 886     if (!$show_only_subscribed) {
 887         $lsub = 'LIST';
 888         $sub_cache_name='list_cache';
 889     }  elseif ($listsubscribed) {
 890         $lsub = 'LIST (SUBSCRIBED)';
 891         $sub_cache_name='listsub_cache';
 892     } else {
 893         $lsub = 'LSUB';
 894         $sub_cache_name='lsub_cache';
 895     }
 896
 897     // Some IMAP servers allow subfolders to exist even if the parent folders do not
 898     // This fixes some problems with the folder list when this is the case, causing the
 899     // NoSelect folders to be displayed
 900     if ($noselect_fix_enable) {
 901         $lsub_args = "$lsub \"$folder_prefix\" \"*%\"";
 902         $list_args = "LIST \"$folder_prefix\" \"*%\"";
 903     } else {
 904         $lsub_args = "$lsub \"$folder_prefix\" \"*\"";
 905         $list_args = "LIST \"$folder_prefix\" \"*\"";
 906     }
 907
 908     // get subscribed mailbox list from cache (session)
 909     // if not there, then get it from the imap server and store in cache
 910
 911     if (!$force) {
 912         sqgetGlobalVar($sub_cache_name,$lsub_cache,SQ_SESSION);
 913     }
 914
 915     $lsub_assoc_ary=array();
 916     if (!empty($lsub_cache)) {
 917         $lsub_assoc_ary=$lsub_cache;
 918     } else {
 919         $lsub_ary = sqimap_run_command ($imap_stream, $lsub_args, true, $response, $message);
 920         $lsub_ary = compact_mailboxes_response($lsub_ary);
 921         if (!empty($lsub_ary)) {
 922             foreach ($lsub_ary as $rawline) {
 923                 $temp_mailbox_name=find_mailbox_name($rawline);
 924                 $lsub_assoc_ary[$temp_mailbox_name]=$rawline;
 925             }
 926             unset($lsub_ary);
 927             sqsession_register($lsub_assoc_ary,$sub_cache_name);
 928         }
 929     }
 930
 931     // Now to get the mailbox flags
 932     // The LSUB response may return \NoSelect flags, etc. but it is optional
 933     // according to RFC3501, and even when returned it may not be accurate
 934     // or authoratative. LIST will always return accurate results.
 935     if (($lsub == 'LIST') || ($lsub == 'LIST (SUBSCRIBED)')) {
 936         // we've already done a LIST or LIST (SUBSCRIBED)
 937         // and NOT a LSUB, so no need to do it again
 938         $list_assoc_ary  = $lsub_assoc_ary;
 939     } else {
 940         // we did a LSUB so now we need to do a LIST
 941         // first see if it is in cache
 942         $list_cache_name='list_cache';
 943         if (!$force) {
 944             sqgetGlobalVar($list_cache_name,$list_cache,SQ_SESSION);
 945         }
 946
 947         if (!empty($list_cache)) {
 948             $list_assoc_ary=$list_cache;
 949             // we could store this in list_cache_name but not necessary
 950         } else {
 951             // not in cache so we need to go get it from the imap server
 952             $list_assoc_ary = array();
 953             $list_ary = sqimap_run_command($imap_stream, $list_args,
 954                                            true, $response, $message);
 955             $list_ary = compact_mailboxes_response($list_ary);
 956             if (!empty($list_ary)) {
 957                 foreach ($list_ary as $rawline) {
 958                     $temp_mailbox_name=find_mailbox_name($rawline);
 959                     $list_assoc_ary[$temp_mailbox_name]=$rawline;
 960                 }
 961                 unset($list_ary);
 962                 sqsession_register($list_assoc_ary,$list_cache_name);
 963             }
 964         }
 965     }
 966
 967     // If they aren't subscribed to the inbox, then add it anyway (if its in LIST)
 968     $inbox_subscribed=false;
 969     if (!empty($lsub_assoc_ary)) {
 970         foreach ($lsub_assoc_ary as $temp_mailbox_name=>$rawline) {
 971             if (strtoupper($temp_mailbox_name) == 'INBOX') {
 972                 $inbox_subscribed=true;
 973             }
 974         }
 975     }
 976     if (!$inbox_subscribed)  {
 977         if (!empty($list_assoc_ary)) {
 978             foreach ($list_assoc_ary as $temp_mailbox_name=>$rawline) {
 979                 if (strtoupper($temp_mailbox_name) == 'INBOX') {
 980                     $lsub_assoc_ary[$temp_mailbox_name]=$rawline;
 981                 }
 982             }
 983         }
 984     }
 985
 986     // Now we have the raw output, we need to create an array of mailbox names we will return
 987     if (!$show_only_subscribed) {
 988         $final_folders_assoc_ary=$list_assoc_ary;
 989     } else {
 990         /**
 991          * only show subscribed folders
 992          * we need to merge the folders here... we can't trust the flags, etc. from the lsub_assoc_array
 993          * so we use the lsub_assoc_array as the list of folders and the values come from list_assoc_array
 994          */
 995         if (!empty($lsub_assoc_ary)) {
 996             foreach ($lsub_assoc_ary as $temp_mailbox_name=>$rawline) {
 997                 if (!empty($list_assoc_ary[$temp_mailbox_name])) {
 998                     $final_folders_assoc_ary[$temp_mailbox_name]=$list_assoc_ary[$temp_mailbox_name];
 999                 }
1000             }
1001         }
1002     }
1003
1004
1005     // Now produce a flat, sorted list
1006     if (!empty($final_folders_assoc_ary)) {
1007         uksort($final_folders_assoc_ary,'strnatcasecmp');
1008         foreach ($final_folders_assoc_ary as $temp_mailbox_name=>$rawline) {
1009             $final_folders_ary[]=$rawline;
1010         }
1011     }
1012
1013     // this will put it into an array we can use later
1014     // containing:
1015     // raw    - Raw LIST/LSUB response from the IMAP server
1016     // formatted - formatted folder name
1017     // unformatted - unformatted, but with the delimiter at the end removed
1018     // unformated-dm - folder name as it appears in raw response
1019     // unformatted-disp - unformatted without $folder_prefix
1020     // id - the array element number (0, 1, 2, etc.)
1021     // flags - mailbox flags
1022     if (!empty($final_folders_ary)) {
1023         $boxesall = sqimap_mailbox_parse($final_folders_ary);
1024     } else {
1025         // they have no mailboxes
1026         $boxesall=array();
1027     }
1028
1029     /* Now, lets sort for special folders */
1030     $boxesnew = $used = array();
1031
1032     /* Find INBOX */
1033     $cnt = count($boxesall);
1034     $used = array_pad($used,$cnt,false);
1035     $has_inbox = false;
1036     for($k = 0; $k < $cnt; ++$k) {
1037         if (strtoupper($boxesall[$k]['unformatted']) == 'INBOX') {
1038             $boxesnew[] = $boxesall[$k];
1039             $used[$k] = true;
1040             $has_inbox = true;
1041             break;
1042         }
1043     }
1044
1045     if ($has_inbox == false) {
1046         // do a list request for inbox because we should always show
1047         // inbox even if the user isn't subscribed to it.
1048         $inbox_ary = sqimap_run_command($imap_stream, 'LIST "" "INBOX"',
1049                                         true, $response, $message);
1050         $inbox_ary = compact_mailboxes_response($inbox_ary);
1051         if (count($inbox_ary)) {
1052             $inbox_entry = sqimap_mailbox_parse($inbox_ary);
1053             // add it on top of the list
1054             if (!empty($boxesnew)) {
1055                 array_unshift($boxesnew,$inbox_entry[0]);
1056             } else {
1057                 $boxesnew[]=$inbox_entry[0];
1058             }
1059             /* array_unshift($used,true); */
1060         }
1061     }
1062
1063     /* List special folders and their subfolders, if requested. */
1064     if ($list_special_folders_first) {
1065         for($k = 0; $k < $cnt; ++$k) {
1066             if (!$used[$k] && isSpecialMailbox($boxesall[$k]['unformatted'])) {
1067                 $boxesnew[] = $boxesall[$k];
1068                 $used[$k]   = true;
1069             }
1070         }
1071     }
1072
1073     /* Find INBOX's children */
1074     for($k = 0; $k < $cnt; ++$k) {
1075         $isboxbelow=isBoxBelow(strtoupper($boxesall[$k]['unformatted']),'INBOX');
1076         if (strtoupper($boxesall[$k]['unformatted']) == 'INBOX') {
1077             $is_inbox=1;
1078         } else {
1079             $is_inbox=0;
1080         }
1081
1082         if (!$used[$k] && $isboxbelow && $is_inbox) {
1083             $boxesnew[] = $boxesall[$k];
1084             $used[$k] = true;
1085         }
1086     }
1087
1088     /* Rest of the folders */
1089     for($k = 0; $k < $cnt; $k++) {
1090         if (!$used[$k]) {
1091             $boxesnew[] = $boxesall[$k];
1092         }
1093     }
1094     /**
1095      * Don't register boxes in session, if $session_register is set to false
1096      * Prevents registration of sqimap_mailbox_list_all() results.
1097      */
1098     if ($session_register) sqsession_register($boxesnew,'boxesnew');
1099     return $boxesnew;
1100 }
1101
1102 /**
1103  * Fills mailbox object
1104  *
1105  * this is passed the mailbox array by left_main.php
1106  * who has previously obtained it from sqimap_get_mailboxes
1107  * that way, the raw mailbox list is available in left_main to other
1108  * things besides just sqimap_mailbox_tree
1109  * imap_stream is just used now to get status info
1110  *
1111  * most of the functionality is moved to sqimap_get_mailboxes
1112  * also takes care of TODO items:
1113  * caching mailbox tree
1114  * config setting for UW imap section (not needed now)
1115  *
1116  * Some code fragments are present in 1.3.0 - 1.4.4.
1117  * @param stream $imap_stream imap connection resource
1118  * @param array $lsub_ary output array from sqimap_get_mailboxes (contains mailboxes and flags)
1119  * @return object see mailboxes class.
1120  * @since 1.5.0
1121  */
1122 function sqimap_mailbox_tree($imap_stream,$lsub_ary) {
1123
1124     $sorted_lsub_ary = array();
1125     $cnt = count($lsub_ary);
1126     for ($i = 0; $i < $cnt; $i++) {
1127         $mbx=$lsub_ary[$i]['unformatted'];
1128         $flags=$lsub_ary[$i]['flags'];
1129
1130         $noinferiors=0;
1131         if (in_array('\Noinferiors',$flags)) { $noinferiors=1; }
1132         if (in_array('\NoInferiors',$flags)) { $noinferiors=1; }
1133         if (in_array('\HasNoChildren',$flags)) { $noinferiors=1; }
1134
1135         $noselect=0;
1136         if (in_array('\NoSelect',$flags)) { $noselect=1; }
1137         /**
1138          * LIST (SUBSCRIBED) has two new flags, \NonExistent which means the mailbox is subscribed to
1139          * but doesn't exist, and \PlaceHolder which is similar (but not the same) as \NoSelect
1140          * For right now, we'll treat these the same as \NoSelect and this behavior can be changed
1141          * later if needed
1142          */
1143         if (in_array('\NonExistent',$flags)) { $noselect=1; }
1144         if (in_array('\PlaceHolder',$flags)) { $noselect=1; }
1145         $sorted_lsub_ary[] = array ('mbx' => $mbx, 'noselect' => $noselect, 'noinferiors' => $noinferiors);
1146     }
1147
1148     $sorted_lsub_ary = array_values($sorted_lsub_ary);
1149     usort($sorted_lsub_ary, 'mbxSort');
1150     $boxestree = sqimap_fill_mailbox_tree($sorted_lsub_ary,false,$imap_stream);
1151     return $boxestree;
1152 }
1153
1154 /**
1155  * Callback function used for sorting mailboxes in sqimap_mailbox_tree
1156  * @param string $a
1157  * @param string $b
1158  * @return integer see php strnatcasecmp()
1159  * @since 1.5.1
1160  */
1161 function mbxSort($a, $b) {
1162     return strnatcasecmp($a['mbx'], $b['mbx']);
1163 }
1164
1165 /**
1166  * Fills mailbox object
1167  *
1168  * Some code fragments are present in 1.3.0 - 1.4.4.
1169  * @param array $mbx_ary
1170  * @param $mbxs
1171  * @param stream $imap_stream imap connection resource
1172  * @return object see mailboxes class
1173  * @since 1.5.0
1174  */
1175 function sqimap_fill_mailbox_tree($mbx_ary, $mbxs=false,$imap_stream) {
1176     global $data_dir, $username, $list_special_folders_first,
1177            $folder_prefix, $trash_folder, $sent_folder, $draft_folder,
1178            $move_to_trash, $move_to_sent, $save_as_draft,
1179            $delimiter, $imap_server_type;
1180
1181     // $special_folders = array ('INBOX', $sent_folder, $draft_folder, $trash_folder);
1182
1183     /* create virtual root node */
1184     $mailboxes= new mailboxes();
1185     $mailboxes->is_root = true;
1186     $trail_del = false;
1187     $start = 0;
1188
1189     if (isset($folder_prefix) && ($folder_prefix != '')) {
1190         $start = substr_count($folder_prefix,$delimiter);
1191         if (strrpos($folder_prefix, $delimiter) == (strlen($folder_prefix)-1)) {
1192             $mailboxes->mailboxname_full = substr($folder_prefix,0, (strlen($folder_prefix)-1));
1193         } else {
1194             $mailboxes->mailboxname_full = $folder_prefix;
1195             $start++;
1196         }
1197         $mailboxes->mailboxname_sub = $mailboxes->mailboxname_full;
1198     } else {
1199         $start = 0;
1200     }
1201
1202     $cnt = count($mbx_ary);
1203     for ($i=0; $i < $cnt; $i++) {
1204         if ($mbx_ary[$i]['mbx'] !='' ) {
1205             $mbx = new mailboxes();
1206             $mailbox = $mbx_ary[$i]['mbx'];
1207
1208             /*
1209              * Set the is_special flag if it concerned a special mailbox.
1210              * Used for displaying the special folders on top in the mailbox
1211              * tree displaying code.
1212              */
1213             $mbx->is_special |= ($mbx->is_inbox = (strtoupper($mailbox) == 'INBOX'));
1214             $mbx->is_special |= ($mbx->is_trash = isTrashMailbox($mailbox));
1215             $mbx->is_special |= ($mbx->is_sent = isSentMailbox($mailbox));
1216             $mbx->is_special |= ($mbx->is_draft = isDraftMailbox($mailbox));
1217
1218             if (!$mbx->is_special)
1219                 $mbx->is_special = boolean_hook_function('special_mailbox', $mailbox, 1);
1220
1221             if (isset($mbx_ary[$i]['unseen'])) {
1222                 $mbx->unseen = $mbx_ary[$i]['unseen'];
1223             }
1224             if (isset($mbx_ary[$i]['nummessages'])) {
1225                 $mbx->total = $mbx_ary[$i]['nummessages'];
1226             }
1227
1228             $mbx->is_noselect = $mbx_ary[$i]['noselect'];
1229             $mbx->is_noinferiors = $mbx_ary[$i]['noinferiors'];
1230
1231             $r_del_pos = strrpos($mbx_ary[$i]['mbx'], $delimiter);
1232             if ($r_del_pos) {
1233                 $mbx->mailboxname_sub = substr($mbx_ary[$i]['mbx'],$r_del_pos+1);
1234             } else {   /* mailbox is root folder */
1235                 $mbx->mailboxname_sub = $mbx_ary[$i]['mbx'];
1236             }
1237             $mbx->mailboxname_full = $mbx_ary[$i]['mbx'];
1238
1239             $mailboxes->addMbx($mbx, $delimiter, $start, $list_special_folders_first);
1240         }
1241     }
1242     sqimap_utf7_decode_mbx_tree($mailboxes);
1243     sqimap_get_status_mbx_tree($imap_stream,$mailboxes);
1244     return $mailboxes;
1245 }
1246
1247 /**
1248  * @param object $mbx_tree
1249  * @since 1.5.0
1250  */
1251 function sqimap_utf7_decode_mbx_tree(&$mbx_tree) {
1252     global $draft_folder, $sent_folder, $trash_folder, $translate_special_folders;
1253
1254     /* decode folder name and set mailboxname_sub */
1255     if ($translate_special_folders && strtoupper($mbx_tree->mailboxname_full) == 'INBOX') {
1256         $mbx_tree->mailboxname_sub = _("INBOX");
1257     } elseif ($translate_special_folders && $mbx_tree->mailboxname_full == $draft_folder) {
1258         $mbx_tree->mailboxname_sub = _("Drafts");
1259     } elseif ($translate_special_folders && $mbx_tree->mailboxname_full == $sent_folder) {
1260         $mbx_tree->mailboxname_sub = _("Sent");
1261     } elseif ($translate_special_folders && $mbx_tree->mailboxname_full == $trash_folder) {
1262         $mbx_tree->mailboxname_sub = _("Trash");
1263     } else {
1264         $mbx_tree->mailboxname_sub = imap_utf7_decode_local($mbx_tree->mailboxname_sub);
1265     }
1266
1267     if ($mbx_tree->mbxs) {
1268         $iCnt = count($mbx_tree->mbxs);
1269         for ($i=0;$i<$iCnt;++$i) {
1270             sqimap_utf7_decode_mbx_tree($mbx_tree->mbxs[$i]);
1271         }
1272     }
1273 }
1274
1275 /**
1276  * @param object $mbx_tree
1277  * @param array $aMbxs
1278  * @since 1.5.0
1279  */
1280 function sqimap_tree_to_ref_array(&$mbx_tree,&$aMbxs) {
1281    if ($mbx_tree)
1282    $aMbxs[] =& $mbx_tree;
1283    if ($mbx_tree->mbxs) {
1284       $iCnt = count($mbx_tree->mbxs);
1285       for ($i=0;$i<$iCnt;++$i) {
1286          sqimap_tree_to_ref_array($mbx_tree->mbxs[$i],$aMbxs);
1287       }
1288    }
1289 }
1290
1291 /**
1292  * @param stream $imap_stream imap connection resource
1293  * @param object $mbx_tree
1294  * @since since 1.5.0
1295  */
1296 function sqimap_get_status_mbx_tree($imap_stream,&$mbx_tree) {
1297     global $unseen_notify, $unseen_type, $trash_folder,$move_to_trash;
1298     $aMbxs = $aQuery = array();
1299     sqimap_tree_to_ref_array($mbx_tree,$aMbxs);
1300     // remove the root node
1301     array_shift($aMbxs);
1302
1303     if($unseen_notify == 3) {
1304         $cnt = count($aMbxs);
1305         for($i=0;$i<$cnt;++$i) {
1306             $oMbx =& $aMbxs[$i];
1307             if (!$oMbx->is_noselect) {
1308                 $mbx = $oMbx->mailboxname_full;
1309                 if ($unseen_type == 2 ||
1310                    ($move_to_trash && $oMbx->mailboxname_full == $trash_folder)) {
1311                    $query = 'STATUS ' . sqimap_encode_mailbox_name($mbx) . ' (MESSAGES UNSEEN RECENT)';
1312                 } else {
1313                    $query = 'STATUS ' . sqimap_encode_mailbox_name($mbx) . ' (UNSEEN RECENT)';
1314                 }
1315                 sqimap_prepare_pipelined_query($query,$tag,$aQuery,false);
1316             } else {
1317                 $oMbx->unseen = $oMbx->total = $oMbx->recent = false;
1318                 $tag = false;
1319             }
1320             $oMbx->tag = $tag;
1321             $aMbxs[$i] =& $oMbx;
1322         }
1323         // execute all the queries at once
1324         $aResponse = sqimap_run_pipelined_command ($imap_stream, $aQuery, false, $aServerResponse, $aServerMessage);
1325         $cnt = count($aMbxs);
1326         for($i=0;$i<$cnt;++$i) {
1327             $oMbx =& $aMbxs[$i];
1328             $tag = $oMbx->tag;
1329             if ($tag && $aServerResponse[$tag] == 'OK') {
1330                 $sResponse = implode('', $aResponse[$tag]);
1331                 if (preg_match('/UNSEEN\s+([0-9]+)/i', $sResponse, $regs)) {
1332                     $oMbx->unseen = $regs[1];
1333                 }
1334                 if (preg_match('/MESSAGES\s+([0-9]+)/i', $sResponse, $regs)) {
1335                     $oMbx->total = $regs[1];
1336                 }
1337                 if (preg_match('/RECENT\s+([0-9]+)/i', $sResponse, $regs)) {
1338                     $oMbx->recent = $regs[1];
1339                 }
1340
1341            }
1342            unset($oMbx->tag);
1343         }
1344     } else if ($unseen_notify == 2) { // INBOX only
1345         $cnt = count($aMbxs);
1346         for($i=0;$i<$cnt;++$i) {
1347             $oMbx =& $aMbxs[$i];
1348             if (strtoupper($oMbx->mailboxname_full) == 'INBOX' ||
1349                ($move_to_trash && $oMbx->mailboxname_full == $trash_folder)) {
1350                  if ($unseen_type == 2 ||
1351                    ($oMbx->mailboxname_full == $trash_folder && $move_to_trash)) {
1352                     $aStatus = sqimap_status_messages($imap_stream,$oMbx->mailboxname_full);
1353                     $oMbx->unseen = $aStatus['UNSEEN'];
1354                     $oMbx->total  = $aStatus['MESSAGES'];
1355                     $oMbx->recent = $aStatus['RECENT'];
1356                 } else {
1357                     $oMbx->unseen = sqimap_unseen_messages($imap_stream,$oMbx->mailboxname_full);
1358                 }
1359                 $aMbxs[$i] =& $oMbx;
1360                 if (!$move_to_trash && $trash_folder) {
1361                     break;
1362                 } else {
1363                    // trash comes after INBOX
1364                    if ($oMbx->mailboxname_full == $trash_folder) {
1365                       break;
1366                    }
1367                 }
1368             }
1369         }
1370     }
1371
1372     $cnt = count($aMbxs);
1373     for($i=0;$i<$cnt;++$i) {
1374          $oMbx =& $aMbxs[$i];
1375          unset($hook_status);
1376          if (!empty($oMbx->unseen)) { $hook_status['UNSEEN']=$oMbx->unseen; }
1377          if (!empty($oMbx->total)) { $hook_status['MESSAGES']=$oMbx->total; }
1378          if (!empty($oMbx->recent)) { $hook_status['RECENT']=$oMbx->recent; }
1379          if (!empty($hook_status))
1380          {
1381               $hook_status['MAILBOX']=$oMbx->mailboxname_full;
1382               $hook_status['CALLER']='sqimap_get_status_mbx_tree'; // helps w/ debugging
1383               do_hook('folder_status', $hook_status);
1384          }
1385     }
1386 }
1387
1388 /**
1389  * Checks if folder is noselect (can't store messages)
1390  *
1391  * Function does not check if folder subscribed.
1392  * @param stream $oImapStream imap connection resource
1393  * @param string $sImapFolder imap folder name
1394  * @param object $oBoxes mailboxes class object.
1395  * @return boolean true, when folder has noselect flag. false in any other case.
1396  * @since 1.5.1
1397  */
1398 function sqimap_mailbox_is_noselect($oImapStream,$sImapFolder,&$oBoxes) {
1399     // build mailbox object if it is not available
1400     if (! is_object($oBoxes)) $oBoxes=sqimap_mailbox_list($oImapStream);
1401     foreach($oBoxes as $box) {
1402         if ($box['unformatted']==$sImapFolder) {
1403             return (bool) check_is_noselect($box['raw']);
1404         }
1405     }
1406     return false;
1407 }
1408
1409 /**
1410  * Checks if folder is noinferiors (can't store other folders)
1411  *
1412  * Function does not check if folder subscribed.
1413  * @param stream $oImapStream imap connection resource
1414  * @param string $sImapFolder imap folder name
1415  * @param object $oBoxes mailboxes class object.
1416  * @return boolean true, when folder has noinferiors flag. false in any other case.
1417  * @since 1.5.1
1418  */
1419 function sqimap_mailbox_is_noinferiors($oImapStream,$sImapFolder,&$oBoxes) {
1420     // build mailbox object if it is not available
1421     if (! is_object($oBoxes)) $oBoxes=sqimap_mailbox_list($oImapStream);
1422     foreach($oBoxes as $box) {
1423         if ($box['unformatted']==$sImapFolder) {
1424             return (bool) check_is_noinferiors($box['raw']);
1425         }
1426     }
1427     return false;
1428 }