functions/imap_asearch.php

   1 <?php
   2
   3 /**
   4  * imap_search.php
   5  *
   6  * Copyright (c) 1999-2004 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * IMAP asearch routines
  10  *
  11  * $Id$
  12  * @package squirrelmail
  13  * @see search.php
  14  * @link ftp://ftp.rfc-editor.org/in-notes/rfc3501.txt
  15  * @author Alex Lemaresquier - Brainstorm - alex at brainstorm.fr
  16  *
  17  * Subfolder search idea from Patch #806075 by Thomas Pohl xraven at users.sourceforge.net. Thanks Thomas!
  18  */
  19
  20 /** This functionality requires the IMAP and date functions */
  21 require_once(SM_PATH . 'functions/imap_general.php');
  22 require_once(SM_PATH . 'functions/date.php');
  23
  24 /** Set to TRUE to dump the imap dialogue
  25  * @global bool $imap_asearch_debug_dump
  26  */
  27 $imap_asearch_debug_dump = FALSE;
  28
  29 /** Imap SEARCH keys
  30  * @global array $imap_asearch_opcodes
  31  */
  32 $imap_asearch_opcodes = array(
  33 /* <message set> => 'asequence', */
  34 /*'ALL' is binary operator */
  35         'ANSWERED' => '',
  36         'BCC' => 'astring',
  37         'BEFORE' => 'adate',
  38         'BODY' => 'astring',
  39         'CC' => 'astring',
  40         'DELETED' => '',
  41         'DRAFT' => '',
  42         'FLAGGED' => '',
  43         'FROM' => 'astring',
  44         'HEADER' => 'afield',   /* Special syntax for this one, see below */
  45         'KEYWORD' => 'akeyword',
  46         'LARGER' => 'anum',
  47         'NEW' => '',
  48 /*'NOT' is unary operator */
  49         'OLD' => '',
  50         'ON' => 'adate',
  51 /*'OR' is binary operator */
  52         'RECENT' => '',
  53         'SEEN' => '',
  54         'SENTBEFORE' => 'adate',
  55         'SENTON' => 'adate',
  56         'SENTSINCE' => 'adate',
  57         'SINCE' => 'adate',
  58         'SMALLER' => 'anum',
  59         'SUBJECT' => 'astring',
  60         'TEXT' => 'astring',
  61         'TO' => 'astring',
  62         'UID' => 'asequence',
  63         'UNANSWERED' => '',
  64         'UNDELETED' => '',
  65         'UNDRAFT' => '',
  66         'UNFLAGGED' => '',
  67         'UNKEYWORD' => 'akeyword',
  68         'UNSEEN' => ''
  69 );
  70
  71 /** Imap SEARCH month names encoding
  72  * @global array $imap_asearch_months
  73  */
  74 $imap_asearch_months = array(
  75         '01' => 'jan',
  76         '02' => 'feb',
  77         '03' => 'mar',
  78         '04' => 'apr',
  79         '05' => 'may',
  80         '06' => 'jun',
  81         '07' => 'jul',
  82         '08' => 'aug',
  83         '09' => 'sep',
  84         '10' => 'oct',
  85         '11' => 'nov',
  86         '12' => 'dec'
  87 );
  88
  89 /** Error message titles according to imap server returned code
  90  * @global array $imap_error_titles
  91  */
  92 $imap_error_titles = array(
  93         'OK' => '',
  94         'NO' => _("ERROR : Could not complete request."),
  95         'BAD' => _("ERROR : Bad or malformed request."),
  96         'BYE' => _("ERROR : Imap server closed the connection."),
  97         '' => _("ERROR : Connection dropped by imap-server.")
  98 );
  99
 100 /**
 101  * Function to display an error related to an IMAP-query.
 102  * We need to do our own error management since we may receive NO responses on purpose (even BAD with SORT or THREAD)
 103  * so we call sqimap_error_box() if the function exists (sm >= 1.5) or use our own embedded code
 104  * @global array imap_error_titles
 105  * @param string $response the imap server response code
 106  * @param string $query the failed query
 107  * @param string $message an optional error message
 108  * @param string $link an optional link to try again
 109  */
 110 //@global array color sm colors array
 111 function sqimap_asearch_error_box($response, $query, $message, $link = '')
 112 {
 113         global $imap_error_titles;
 114
 115         //if (!array_key_exists($response, $imap_error_titles)) //php 4.0.6 compatibility
 116         if (!in_array($response, array_keys($imap_error_titles)))
 117                 $title = _("ERROR : Unknown imap response.");
 118         else
 119                 $title = $imap_error_titles[$response];
 120         if ($link == '')
 121                 $message_title = _("Reason Given: ");
 122         else
 123                 $message_title = _("Possible reason : ");
 124         if (function_exists('sqimap_error_box'))
 125                 sqimap_error_box($title, $query, $message_title, $message, $link);
 126         else {  //Straight copy of 1.5 imap_general.php:sqimap_error_box(). Can be removed at a later time
 127                 global $color;
 128     require_once(SM_PATH . 'functions/display_messages.php');
 129     $string = "<font color=$color[2]><b>\n" . $title . "</b><br>\n";
 130     if ($query != '')
 131         $string .= _("Query:") . ' ' . htmlspecialchars($query) . '<br>';
 132     if ($message_title != '')
 133         $string .= $message_title;
 134     if ($message != '')
 135         $string .= htmlspecialchars($message);
 136     if ($link != '')
 137         $string .= $link;
 138     $string .= "</font><br>\n";
 139     error_box($string,$color);
 140         }
 141 }
 142
 143 /**
 144  * This is to avoid the E_NOTICE warnings signaled by marc AT squirrelmail.org. Thanks Marc!
 145  * @param mixed $var any variable (reference)
 146  * @return mixed zls ('') if $var is not defined, otherwise $var
 147  */
 148 function asearch_nz(&$var)
 149 {
 150         if (isset($var))
 151                 return $var;
 152         return '';
 153 }
 154
 155 /**
 156  * This should give the same results as PHP 4 >= 4.3.0's html_entity_decode(),
 157  * except it doesn't handle hex constructs
 158  * @param string $string string to unhtmlentity()
 159  * @return string decoded string
 160  */
 161 function asearch_unhtmlentities($string) {
 162         $trans_tbl = array_flip(get_html_translation_table(HTML_ENTITIES));
 163         for ($i=127; $i<255; $i++)      /* Add &#<dec>; entities */
 164                 $trans_tbl['&#' . $i . ';'] = chr($i);
 165         return strtr($string, $trans_tbl);
 166 /* I think the one above is quicker, though it should be benchmarked
 167         $string = strtr($string, array_flip(get_html_translation_table(HTML_ENTITIES)));
 168         return preg_replace("/&#([0-9]+);/E", "chr('\\1')", $string);
 169 */
 170 }
 171
 172 /**
 173  * Provide an easy way to dump the imap dialogue if $imap_asearch_debug_dump is TRUE
 174  * @global imap_asearch_debug_dump
 175  * @param string $var_name
 176  * @param string $var_var
 177  */
 178 function s_debug_dump($var_name, $var_var)
 179 {
 180         global $imap_asearch_debug_dump;
 181         if ($imap_asearch_debug_dump) {
 182                 if (function_exists('sm_print_r'))      //Only exists since 1.4.2
 183                         sm_print_r($var_name, $var_var);        //Better be the 'varargs' version ;)
 184                 else {
 185                         echo '<pre>';
 186                         echo htmlentities($var_name);
 187                         print_r($var_var);
 188                         echo '</pre>';
 189                 }
 190         }
 191 }
 192
 193 /** Encode a string to quoted or literal as defined in rfc 3501
 194  *
 195  * - § 4.3 String:
 196  *      A quoted string is a sequence of zero or more 7-bit characters,
 197  *       excluding CR and LF, with double quote (<">) characters at each end.
 198  * - § 9. Formal Syntax:
 199  *      quoted-specials = DQUOTE / "\"
 200  * @param string $what string to encode
 201  * @param string $charset search charset used
 202  * @return string encoded string
 203  */
 204 function sqimap_asearch_encode_string($what, $charset)
 205 {
 206         if (strtoupper($charset) == 'ISO-2022-JP')      // This should be now handled in imap_utf7_local?
 207                 $what = mb_convert_encoding($what, 'JIS', 'auto');
 208 //if (ereg("[\"\\\r\n\x80-\xff]", $what))
 209         if (preg_match('/["\\\\\r\n\x80-\xff]/', $what))
 210                 return '{' . strlen($what) . "}\r\n" . $what;   // 4.3 literal form
 211         return '"' . $what . '"';       // 4.3 quoted string form
 212 }
 213
 214 /**
 215  * Parses a user date string into an rfc 3501 date string
 216  * Handles space, slash, backslash, dot and comma as separators (and dash of course ;=)
 217  * @global imap_asearch_months
 218  * @param string user date
 219  * @return array a preg_match-style array:
 220  *  - [0] = fully formatted rfc 3501 date string (<day number>-<US month TLA>-<4 digit year>)
 221  *  - [1] = day
 222  *  - [2] = month
 223  *  - [3] = year
 224  */
 225 function sqimap_asearch_parse_date($what)
 226 {
 227         global $imap_asearch_months;
 228
 229         $what = trim($what);
 230         $what = ereg_replace('[ /\\.,]+', '-', $what);
 231         if ($what) {
 232                 preg_match('/^([0-9]+)-+([^\-]+)-+([0-9]+)$/', $what, $what_parts);
 233                 if (count($what_parts) == 4) {
 234                         $what_month = strtolower(asearch_unhtmlentities($what_parts[2]));
 235 /*              if (!in_array($what_month, $imap_asearch_months)) {*/
 236                                 foreach ($imap_asearch_months as $month_number => $month_code) {
 237                                         if (($what_month == $month_number)
 238                                          || ($what_month == $month_code)
 239                                          || ($what_month == strtolower(asearch_unhtmlentities(getMonthName($month_number))))
 240                                          || ($what_month == strtolower(asearch_unhtmlentities(getMonthAbrv($month_number))))
 241                                          ) {
 242                                                 $what_parts[2] = $month_number;
 243                                                 $what_parts[0] = $what_parts[1] . '-' . $month_code . '-' . $what_parts[3];
 244                                                 break;
 245                                         }
 246                                 }
 247 /*              }*/
 248                 }
 249         }
 250         else
 251                 $what_parts = array();
 252         return $what_parts;
 253 }
 254
 255 /**
 256  * Build one criteria sequence
 257  * @global array imap_asearch_opcodes
 258  * @param string $opcode search opcode
 259  * @param string $what opcode argument
 260  * @param string $charset search charset
 261  * @return string one full criteria sequence
 262  */
 263 function sqimap_asearch_build_criteria($opcode, $what, $charset)
 264 {
 265         global $imap_asearch_opcodes;
 266
 267         $criteria = '';
 268         switch ($imap_asearch_opcodes[$opcode]) {
 269                 default:
 270                 case 'anum':
 271 //                      $what = str_replace(' ', '', $what);
 272                         $what = ereg_replace('[^0-9]+', '', $what);
 273                         if ($what != '')
 274                                 $criteria = $opcode . ' ' . $what . ' ';
 275                 break;
 276                 case '':        //aflag
 277                         $criteria = $opcode . ' ';
 278                 break;
 279                 case 'afield':  /* HEADER field-name: field-body */
 280                         preg_match('/^([^:]+):(.*)$/', $what, $what_parts);
 281                         if (count($what_parts) == 3)
 282                                 $criteria = $opcode . ' ' .
 283                                         sqimap_asearch_encode_string($what_parts[1], $charset) . ' ' .
 284                                         sqimap_asearch_encode_string($what_parts[2], $charset) . ' ';
 285                 break;
 286                 case 'adate':
 287                         $what_parts = sqimap_asearch_parse_date($what);
 288                         if (isset($what_parts[0]))
 289                                 $criteria = $opcode . ' ' . $what_parts[0] . ' ';
 290                 break;
 291                 case 'akeyword':
 292                 case 'astring':
 293                         $criteria = $opcode . ' ' . sqimap_asearch_encode_string($what, $charset) . ' ';
 294                 break;
 295                 case 'asequence':
 296                         $what = ereg_replace('[^0-9:\(\)]+', '', $what);
 297                         if ($what != '')
 298                                 $criteria = $opcode . ' ' . $what . ' ';
 299                 break;
 300         }
 301         return $criteria;
 302 }
 303
 304 /**
 305  * Another way to do array_values(array_unique(array_merge($to, $from)));
 306  * @param array $to to array (reference)
 307  * @param array $from from array
 308  * @return array uniquely merged array
 309  */
 310 function sqimap_array_merge_unique(&$to, $from)
 311 {
 312         if (empty($to))
 313                 return $from;
 314         $count = count($from);
 315         for ($i = 0; $i < $count; $i++) {
 316                 if (!in_array($from[$i], $to))
 317                         $to[] = $from[$i];
 318         }
 319         return $to;
 320 }
 321
 322 /**
 323  * Run the imap SEARCH command as defined in rfc 3501
 324  * @link ftp://ftp.rfc-editor.org/in-notes/rfc3501.txt
 325  * @param resource $imapConnection the current imap stream
 326  * @param string $search_string the full search expression eg "ALL RECENT"
 327  * @param string $search_charset charset to use or zls ('')
 328  * @return array an IDs or UIDs array of matching messages or an empty array
 329  */
 330 function sqimap_run_search($imapConnection, $search_string, $search_charset)
 331 {
 332         global $uid_support;
 333
 334         /* 6.4.4 try OPTIONAL [CHARSET] specification first */
 335         if ($search_charset != '')
 336                 $query = 'SEARCH CHARSET "' . strtoupper($search_charset) . '" ALL ' . $search_string;
 337         else
 338                 $query = 'SEARCH ALL ' . $search_string;
 339         s_debug_dump('C:', $query);
 340         $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 341
 342         /* 6.4.4 try US-ASCII charset if we tried an OPTIONAL [CHARSET] and received a tagged NO response (SHOULD be [BADCHARSET]) */
 343         if (($search_charset != '')  && (strtoupper($response) == 'NO')) {
 344                 $query = 'SEARCH CHARSET US-ASCII ALL ' . $search_string;
 345                 s_debug_dump('C:', $query);
 346                 $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 347         }
 348         if (strtoupper($response) != 'OK') {
 349                 sqimap_asearch_error_box($response, $query, $message);
 350                 return array();
 351         }
 352
 353         // Keep going till we find the * SEARCH response
 354         foreach ($readin as $readin_part) {
 355                 s_debug_dump('S:', $readin_part);
 356                 if (substr($readin_part, 0, 9) == '* SEARCH ') {
 357                         //EIMS returns multiple SEARCH responses, and this allowed according to Mark Crispin
 358                         $messagelist = sqimap_array_merge_unique($messagelist, preg_split("/ /", substr($readin_part, 9)));
 359                 }
 360         }
 361
 362         if (empty($messagelist))        //Empty search response, ie '* SEARCH'
 363                 return array();
 364
 365         $cnt = count($messagelist);
 366         for ($q = 0; $q < $cnt; $q++)
 367                 $id[$q] = trim($messagelist[$q]);
 368         return $id;
 369 }
 370
 371 /**
 372  * Run the imap SORT command as defined in
 373  * @link http://www.ietf.org/internet-drafts/draft-ietf-imapext-sort-13.txt
 374  * @param resource $imapConnection the current imap stream
 375  * @param string $search_string the full search expression as defined in rfc 3501
 376  * @param string $search_charset mandatory charset
 377  * @param string $sort_criteria the full sort criteria expression eg "SUBJECT REVERSE DATE"
 378  * @return array an IDs or UIDs array of matching messages or an empty array
 379  */
 380 function sqimap_run_sort($imapConnection, $search_string, $search_charset, $sort_criteria)
 381 {
 382         global $uid_support;
 383
 384         if ($search_charset == '')
 385                 $search_charset = 'US-ASCII';
 386         $query = 'SORT (' . $sort_criteria . ') "' . strtoupper($search_charset) . '" ALL ' . $search_string;
 387         s_debug_dump('C:', $query);
 388         $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 389         s_debug_dump('S:', $response);
 390
 391         /* 6.4 try US-ASCII charset if we received a tagged NO response (SHOULD be [BADCHARSET]) */
 392         if (($search_charset != 'US-ASCII')  && (strtoupper($response) == 'NO')) {
 393                 s_debug_dump('S:', $readin);
 394                 $query = 'SORT (' . $sort_criteria . ') US-ASCII ALL ' . $search_string;
 395                 s_debug_dump('C:', $query);
 396                 $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 397                 s_debug_dump('S:', $response);
 398         }
 399
 400         if (strtoupper($response) != 'OK') {
 401                 s_debug_dump('S:', $readin);
 402 //      sqimap_asearch_error_box($response, $query, $message);
 403 //      return array();
 404                 return sqimap_run_search($imapConnection, $search_string, $search_charset);     // Fell back to standard search
 405         }
 406
 407         /* Keep going till we find the * SORT response */
 408         foreach ($readin as $readin_part) {
 409                 s_debug_dump('S:', $readin_part);
 410                 if (substr($readin_part, 0, 7) == '* SORT ') {
 411                         //SORT returns untagged responses
 412                         $messagelist = sqimap_array_merge_unique($messagelist, preg_split("/ /", substr($readin_part, 7)));
 413                 }
 414         }
 415
 416         if (empty($messagelist))        //Empty search response, ie '* SORT'
 417                 return array();
 418
 419         $cnt = count($messagelist);
 420         for ($q = 0; $q < $cnt; $q++)
 421                 $id[$q] = trim($messagelist[$q]);
 422         return $id;
 423 }
 424
 425 /**
 426  * Run the imap THREAD command as defined in
 427  * @link http://www.ietf.org/internet-drafts/draft-ietf-imapext-sort-13.txt
 428  * @param resource $imapConnection the current imap stream
 429  * @param string $search_string the full search expression as defined in rfc 3501
 430  * @param string $search_charset mandatory charset
 431  * @param string $thread_algorithm the threading algorithm "ORDEREDSUBJECT" or "REFERENCES"
 432  * @return array an IDs or UIDs array of matching messages or an empty array
 433  * @global array thread_new will be used by thread view in mailbox_display
 434  * @global array server_sort_array will be used by thread view in mailbox_display
 435  */
 436 function sqimap_run_thread($imapConnection, $search_string, $search_charset, $thread_algorithm)
 437 {
 438         global $thread_new, $server_sort_array;
 439
 440         if (sqsession_is_registered('thread_new'))
 441                 sqsession_unregister('thread_new');
 442         if (sqsession_is_registered('server_sort_array'))
 443                 sqsession_unregister('server_sort_array');
 444
 445         $thread_new = array();
 446         $thread_new[0] = "";
 447
 448         $server_sort_array = array();
 449
 450         global $uid_support;
 451
 452         if ($search_charset == '')
 453                 $search_charset = 'US-ASCII';
 454         $query = 'THREAD ' . $thread_algorithm . ' "' . strtoupper($search_charset) . '" ALL ' . $search_string;
 455         s_debug_dump('C:', $query);
 456         $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 457         s_debug_dump('S:', $response);
 458
 459         /* 6.4 try US-ASCII charset if we received a tagged NO response (SHOULD be [BADCHARSET]) */
 460         if (($search_charset != 'US-ASCII')  && (strtoupper($response) == 'NO')) {
 461                 s_debug_dump('S:', $readin);
 462                 $query = 'THREAD ' . $thread_algorithm . ' US-ASCII ALL ' . $search_string;
 463                 s_debug_dump('C:', $query);
 464                 $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 465                 s_debug_dump('S:', $response);
 466         }
 467
 468         if (strtoupper($response) != 'OK') {
 469                 s_debug_dump('S:', $readin);
 470                 if (empty($response)) { //imap server closed connection. We can't go further.
 471 /* we should at this point:
 472         - warn the user that the THREAD call has failed
 473         - (offer him a way to) disconnect it permanently in the prefs
 474         - perform the regular search instead or provide a way to do it in one click
 475 */
 476                         global $sort, $mailbox, $php_self;
 477                         $message = _("The imap server failed to handle threading.");
 478                         $unthread = _("Click here to unset thread view for this mailbox and start again.");
 479                         if (preg_match('/^(.+)\?.+$/', $php_self, $regs))
 480                                 $source_url = $regs[1];
 481         else
 482                                 $source_url = $php_self;
 483                         $link = '<a href=' . $source_url . '?sort=' . $sort . '&start_messages=1&set_thread=0&mailbox=' . urlencode($mailbox) . '>' . $unthread . '</a>';
 484                         sqimap_asearch_error_box($response, $query, $message, $link);
 485                         return array();
 486                 }
 487                 return sqimap_run_search($imapConnection, $search_string, $search_charset);     // Fell back to standard search
 488         }
 489
 490         /* Keep going till we find the * THREAD response */
 491         foreach ($readin as $readin_part) {
 492                 s_debug_dump('S:', $readin_part);
 493                 if (substr($readin_part, 0, 9) == '* THREAD ') {
 494                         $thread_temp = preg_split("//", substr($readin_part, 9), -1, PREG_SPLIT_NO_EMPTY);
 495                         break;  // Should be the last anyway
 496                 }
 497         }
 498
 499         if (empty($thread_temp))        //Empty search response, ie '* THREAD'
 500                 return array();
 501
 502         $char_count = count($thread_temp);
 503         $counter = 0;
 504         $k = 0;
 505         for ($i=0;$i<$char_count;$i++) {
 506         if ($thread_temp[$i] != ')' && $thread_temp[$i] != '(') {
 507                 $thread_new[$k] = $thread_new[$k] . $thread_temp[$i];
 508         }
 509         elseif ($thread_temp[$i] == '(') {
 510                 $thread_new[$k] .= $thread_temp[$i];
 511                 $counter++;
 512         }
 513         elseif ($thread_temp[$i] == ')') {
 514                 if ($counter > 1) {
 515                         $thread_new[$k] .= $thread_temp[$i];
 516                         $counter = $counter - 1;
 517                 }
 518                 else {
 519                         $thread_new[$k] .= $thread_temp[$i];
 520                         $k++;
 521                         $thread_new[$k] = "";
 522                         $counter = $counter - 1;
 523                 }
 524         }
 525         }
 526         sqsession_register($thread_new, 'thread_new');
 527         $thread_new = array_reverse($thread_new);
 528         $thread_list = implode(" ", $thread_new);
 529         $thread_list = str_replace("(", " ", $thread_list);
 530         $thread_list = str_replace(")", " ", $thread_list);
 531         $thread_list = preg_split("/\s/", $thread_list, -1, PREG_SPLIT_NO_EMPTY);
 532         $server_sort_array = $thread_list;
 533         sqsession_register($server_sort_array, 'server_sort_array');
 534         return $thread_list;
 535 }
 536
 537 /**
 538  * @global bool allow_charset_search user setting
 539  * @global array languages sm languages array
 540  * @global string squirrelmail_language user language setting
 541  * @return string the user defined charset if $allow_charset_search is TRUE else zls ('')
 542  */
 543 function sqimap_asearch_get_charset()
 544 {
 545         global $allow_charset_search, $languages, $squirrelmail_language;
 546
 547         if ($allow_charset_search)
 548                 return $languages[$squirrelmail_language]['CHARSET'];
 549         return '';
 550 }
 551
 552 /**
 553  * Convert sm internal sort to imap sort taking care of:
 554  * - user defined date sorting (ARRIVAL vs DATE)
 555  * - if the searched mailbox is the sent folder then TO is being used instead of FROM
 556  * - reverse order by using REVERSE
 557  * @param string $mailbox mailbox name to sort
 558  * @param integer $sort_by sm sort criteria index
 559  * @global bool internal_date_sort sort by arrival date instead of message date
 560  * @global string sent_folder sent folder name
 561  * @return string imap sort criteria
 562  */
 563 function sqimap_asearch_get_sort_criteria($mailbox, $sort_by)
 564 {
 565         global $internal_date_sort, $sent_folder;
 566
 567         $sort_opcodes = array ('DATE', 'FROM', 'SUBJECT', 'SIZE');
 568         if ($internal_date_sort == true)
 569                 $sort_opcodes[0] = 'ARRIVAL';
 570 //      if (handleAsSent($mailbox))
 571 //      if (isSentFolder($mailbox))
 572         if ($mailbox == $sent_folder)
 573                 $sort_opcodes[1] = 'TO';
 574         return (($sort_by % 2) ? '' : 'REVERSE ') . $sort_opcodes[($sort_by >> 1) & 3];
 575 }
 576
 577 /**
 578  * @param string $cur_mailbox unformatted mailbox name
 579  * @param array $boxes_unformatted selectable mailbox unformatted names array (reference)
 580  * @return array sub mailboxes unformatted names
 581  */
 582 function sqimap_asearch_get_sub_mailboxes($cur_mailbox, $mboxes_array)
 583 {
 584         $sub_mboxes_array = array();
 585         $boxcount = count($mboxes_array);
 586         for ($boxnum=0; $boxnum < $boxcount; $boxnum++) {
 587                 if (isBoxBelow($mboxes_array[$boxnum], $cur_mailbox))
 588                         $sub_mboxes_array[] = $mboxes_array[$boxnum];
 589         }
 590         return $sub_mboxes_array;
 591 }
 592
 593 /**
 594  * Performs the search, given all the criteria, merging results for every mailbox
 595  * @param resource $imapConnection
 596  * @param array $mailbox_array
 597  * @param array $biop_array
 598  * @param array $unop_array
 599  * @param array $where_array
 600  * @param array $what_array
 601  * @param array $exclude_array
 602  * @param array $sub_array
 603  * @param array $mboxes_array selectable unformatted mailboxes names
 604  * @global bool allow_server_sort comes from config.php
 605  * @global integer sort sm internal sort order
 606  * @global bool allow_thread_sort comes from config.php
 607  * @global bool thread_sort_messages does it really need to global?
 608  * @global integer sort_by_ref thread by references
 609  * @global string data_dir
 610  * @global string username
 611  * @return array $mbox_msgs array(mailbox => array(UIDs))
 612  */
 613 function sqimap_asearch($imapConnection, $mailbox_array, $biop_array, $unop_array, $where_array, $what_array, $exclude_array, $sub_array, $mboxes_array)
 614 {
 615         global $allow_server_sort, $sort, $allow_thread_sort, $thread_sort_messages, $sort_by_ref;
 616         global $data_dir, $username;
 617
 618         $search_charset = sqimap_asearch_get_charset();
 619         $mbox_msgs = array();
 620         $search_string = '';
 621         $cur_mailbox = $mailbox_array[0];
 622         $cur_biop = ''; /* Start with ALL */
 623         /* We loop one more time than the real array count, so the last search gets fired */
 624         for ($cur_crit = 0; $cur_crit <= count($where_array); $cur_crit++) {
 625                 if (empty($exclude_array[$cur_crit])) {
 626                         $next_mailbox = $mailbox_array[$cur_crit];
 627                         if ($next_mailbox != $cur_mailbox) {
 628                                 $search_string = trim($search_string);  /* Trim out last space */
 629                                 if ($cur_mailbox == 'All Folders')
 630                                                 $search_mboxes = $mboxes_array;
 631                                 else if ((!empty($sub_array[$cur_crit - 1])) || (!in_array($cur_mailbox, $mboxes_array)))
 632                                         $search_mboxes = sqimap_asearch_get_sub_mailboxes($cur_mailbox, $mboxes_array);
 633                                 else
 634                                         $search_mboxes = array($cur_mailbox);
 635                                 foreach ($search_mboxes as $cur_mailbox) {
 636                                         s_debug_dump('C:SELECT:', $cur_mailbox);
 637                                         sqimap_mailbox_select($imapConnection, $cur_mailbox);
 638                                         $thread_sort_messages = $allow_thread_sort && getPref($data_dir, $username, 'thread_' . $cur_mailbox);
 639                                         if ($thread_sort_messages) {
 640                                                 if ($sort_by_ref == 1)
 641                                                         $thread_algorithm = 'REFERENCES';
 642                                                 else
 643                                                         $thread_algorithm = 'ORDEREDSUBJECT';
 644                                                 $found_msgs = sqimap_run_thread($imapConnection, $search_string, $search_charset, $thread_algorithm);
 645                                         }
 646                                         else
 647                                         if (($allow_server_sort) && ($sort < 6)) {
 648                                                 $sort_criteria = sqimap_asearch_get_sort_criteria($cur_mailbox, $sort);
 649                                                 $found_msgs = sqimap_run_sort($imapConnection, $search_string, $search_charset, $sort_criteria);
 650                                         }
 651                                         else
 652                                                 $found_msgs = sqimap_run_search($imapConnection, $search_string, $search_charset);
 653                                         if (isset($mbox_msgs[$cur_mailbox])) {
 654                                                 if ($cur_biop == 'OR')  /* Merge with previous results */
 655                                                         $mbox_msgs[$cur_mailbox] = sqimap_array_merge_unique($mbox_msgs[$cur_mailbox], $found_msgs);
 656                                                 else    /* Intersect previous results */
 657                                                         $mbox_msgs[$cur_mailbox] = array_values(array_intersect($found_msgs, $mbox_msgs[$cur_mailbox]));
 658                                         }
 659                                         else /* No previous results */
 660                                                 $mbox_msgs[$cur_mailbox] = $found_msgs;
 661                                         if (empty($mbox_msgs[$cur_mailbox]))    /* Can happen with intersect, and we need at the end a contiguous array */
 662                                                 unset($mbox_msgs[$cur_mailbox]);
 663                                 }
 664                                 $cur_mailbox = $next_mailbox;
 665                                 $search_string = '';
 666                         }
 667                         if (isset($where_array[$cur_crit])) {
 668                                 $criteria = sqimap_asearch_build_criteria($where_array[$cur_crit], $what_array[$cur_crit], $search_charset);
 669                                 if (!empty($criteria)) {
 670                                         $unop = $unop_array[$cur_crit];
 671                                         if (!empty($unop))
 672                                                 $criteria = $unop . ' ' . $criteria;
 673                                         /* We need to infix the next non-excluded criteria's biop if it's the same mailbox */
 674                                         $next_biop = '';
 675                                         for ($next_crit = $cur_crit+1; $next_crit <= count($where_array); $next_crit++) {
 676                                                 if (empty($exclude_array[$next_crit])) {
 677                                                         if (asearch_nz($mailbox_array[$next_crit]) == $cur_mailbox)
 678                                                                 $next_biop = asearch_nz($biop_array[$next_crit]);
 679                                                         break;
 680                                                 }
 681                                         }
 682                                         if ($next_biop == 'OR')
 683                                                 $criteria = $next_biop . ' ' . $criteria;
 684                                         $search_string .= $criteria;
 685                                         $cur_biop = asearch_nz($biop_array[$cur_crit]);
 686                                 }
 687                         }
 688                 }
 689         }
 690         return $mbox_msgs;
 691 }
 692
 693 ?>