functions/imap_asearch.php

   1 <?php
   2
   3 /**
   4  * imap_search.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * IMAP asearch routines
  10  * Alex Lemaresquier - Brainstorm - alex at brainstorm.fr
  11  * See README file for infos.
  12  *
  13  */
  14
  15 require_once(SM_PATH . 'functions/imap_general.php');
  16 require_once(SM_PATH . 'functions/date.php');
  17
  18 /* Set to TRUE to dump the imap dialogue */
  19 $imap_asearch_debug_dump = FALSE;
  20
  21 $imap_asearch_opcodes = array(
  22 /* <message set> => 'asequence', */
  23 /*'ALL' is binary operator */
  24         'ANSWERED' => '',
  25         'BCC' => 'astring',
  26         'BEFORE' => 'adate',
  27         'BODY' => 'astring',
  28         'CC' => 'astring',
  29         'DELETED' => '',
  30         'DRAFT' => '',
  31         'FLAGGED' => '',
  32         'FROM' => 'astring',
  33         'HEADER' => 'afield',   /* Special syntax for this one, see below */
  34         'KEYWORD' => 'akeyword',
  35         'LARGER' => 'anum',
  36         'NEW' => '',
  37 /*'NOT' is unary operator */
  38         'OLD' => '',
  39         'ON' => 'adate',
  40 /*'OR' is binary operator */
  41         'RECENT' => '',
  42         'SEEN' => '',
  43         'SENTBEFORE' => 'adate',
  44         'SENTON' => 'adate',
  45         'SENTSINCE' => 'adate',
  46         'SINCE' => 'adate',
  47         'SMALLER' => 'anum',
  48         'SUBJECT' => 'astring',
  49         'TEXT' => 'astring',
  50         'TO' => 'astring',
  51         'UID' => 'asequence',
  52         'UNANSWERED' => '',
  53         'UNDELETED' => '',
  54         'UNDRAFT' => '',
  55         'UNFLAGGED' => '',
  56         'UNKEYWORD' => 'akeyword',
  57         'UNSEEN' => ''
  58 );
  59
  60 $imap_asearch_months = array(
  61         '01' => 'jan',
  62         '02' => 'feb',
  63         '03' => 'mar',
  64         '04' => 'apr',
  65         '05' => 'may',
  66         '06' => 'jun',
  67         '07' => 'jul',
  68         '08' => 'aug',
  69         '09' => 'sep',
  70         '10' => 'oct',
  71         '11' => 'nov',
  72         '12' => 'dec'
  73 );
  74
  75 $imap_error_titles = array(
  76         'OK' => '',
  77         'NO' => _("ERROR : Could not complete request."),
  78         'BAD' => _("ERROR : Bad or malformed request."),
  79         'BYE' => _("ERROR : Imap server closed the connection.")
  80 );
  81
  82 function sqimap_asearch_error_box($response, $query, $message)
  83 {
  84         global $imap_error_titles;
  85
  86         //if (!array_key_exists($response, $imap_error_titles)) //php 4.0.6 compatibility
  87         if (!in_array($response, array_keys($imap_error_titles)))
  88                 $title = _("ERROR : Unknown imap response.");
  89         else
  90                 $title = $imap_error_titles[$response];
  91         $message_title = _("Reason Given: ");
  92         if (function_exists('sqimap_error_box'))
  93                 sqimap_error_box($title, $query, $message_title, $message);
  94         else {  //Straight copy of 1.5 imap_general.php:sqimap_error_box(). Can be removed at a later time
  95                 global $color;
  96     require_once(SM_PATH . 'functions/display_messages.php');
  97     $string = "<font color=$color[2]><b>\n" . $title . "</b><br>\n";
  98     if ($query != '')
  99         $string .= _("Query:") . ' ' . htmlspecialchars($query) . '<br>';
 100     if ($message_title != '')
 101         $string .= $message_title;
 102     if ($message != '')
 103         $string .= htmlspecialchars($message);
 104     $string .= "</font><br>\n";
 105     error_box($string,$color);
 106         }
 107 }
 108
 109 /* This is to avoid the E_NOTICE warnings signaled by marc AT squirrelmail.org. Thanks Marc! */
 110 function asearch_nz(&$var)
 111 {
 112         if (isset($var))
 113                 return $var;
 114         return '';
 115 }
 116
 117 /* This should give the same results as PHP 4 >= 4.3.0's html_entity_decode(), except it doesn't handle hex constructs */
 118 function asearch_unhtmlentities($string) {
 119         $trans_tbl = array_flip(get_html_translation_table(HTML_ENTITIES));
 120         for ($i=127; $i<255; $i++)      /* Add &#<dec>; entities */
 121                 $trans_tbl['&#' . $i . ';'] = chr($i);
 122         return strtr($string, $trans_tbl);
 123 /* I think the one above is quicker, though it should be benchmarked
 124         $string = strtr($string, array_flip(get_html_translation_table(HTML_ENTITIES)));
 125         return preg_replace("/&#([0-9]+);/E", "chr('\\1')", $string);
 126 */
 127 }
 128
 129 function s_debug_dump($var_name, $var_var)
 130 {
 131         global $imap_asearch_debug_dump;
 132         if ($imap_asearch_debug_dump) {
 133                 if (function_exists('sm_print_r'))      //Only exists since 1.4.2
 134                         sm_print_r($var_name, $var_var);        //Better be the 'varargs' version ;)
 135                 else {
 136                         echo '<pre>';
 137                         echo htmlentities($var_name);
 138                         print_r($var_var);
 139                         echo '</pre>';
 140                 }
 141         }
 142 }
 143
 144 /*
 145 4.3 String:
 146         A quoted string is a sequence of zero or more 7-bit characters,
 147          excluding CR and LF, with double quote (<">) characters at each end.
 148 9. Formal Syntax:
 149         quoted-specials = DQUOTE / "\"
 150 */
 151 function sqimap_asearch_encode_string($what, $charset)
 152 {
 153         if (strtoupper($charset) == 'ISO-2022-JP')      // This should be now handled in imap_utf7_local?
 154                 $what = mb_convert_encoding($what, 'JIS', 'auto');
 155 //if (ereg("[\"\\\r\n\x80-\xff]", $what))
 156         if (preg_match('/["\\\\\r\n\x80-\xff]/', $what))
 157                 return '{' . strlen($what) . "}\r\n" . $what;   // 4.3 literal form
 158         return '"' . $what . '"';       // 4.3 quoted string form
 159 }
 160
 161 /*
 162  Parses a user date string into an rfc2060 date string (<day number>-<US month TLA>-<4 digit year>)
 163  Returns a preg_match-style array: [0]: fully formatted date, [1]: day, [2]: month, [3]: year
 164  Handles space, slash, backslash, dot and comma as separators (and dash of course ;=)
 165 */
 166 function sqimap_asearch_parse_date($what)
 167 {
 168         global $imap_asearch_months;
 169
 170         $what = trim($what);
 171         $what = ereg_replace('[ /\\.,]+', '-', $what);
 172         if ($what) {
 173                 preg_match('/^([0-9]+)-+([^\-]+)-+([0-9]+)$/', $what, $what_parts);
 174                 if (count($what_parts) == 4) {
 175                         $what_month = strtolower(asearch_unhtmlentities($what_parts[2]));
 176 /*              if (!in_array($what_month, $imap_asearch_months)) {*/
 177                                 foreach ($imap_asearch_months as $month_number => $month_code) {
 178                                         if (($what_month == $month_number)
 179                                          || ($what_month == $month_code)
 180                                          || ($what_month == strtolower(asearch_unhtmlentities(getMonthName($month_number))))
 181                                          || ($what_month == strtolower(asearch_unhtmlentities(getMonthAbrv($month_number))))
 182                                          ) {
 183                                                 $what_parts[2] = $month_number;
 184                                                 $what_parts[0] = $what_parts[1] . '-' . $month_code . '-' . $what_parts[3];
 185                                                 break;
 186                                         }
 187                                 }
 188 /*              }*/
 189                 }
 190         }
 191         else
 192                 $what_parts = array();
 193         return $what_parts;
 194 }
 195
 196 function sqimap_asearch_build_criteria($opcode, $what, $charset)
 197 {
 198         global $imap_asearch_opcodes;
 199
 200         $criteria = '';
 201         switch ($imap_asearch_opcodes[$opcode]) {
 202                 default:
 203                 case 'anum':
 204 /*                      $what = str_replace(' ', '', $what);*/
 205                         $what = ereg_replace('[^0-9]+', '', $what);
 206                         if ($what != '')
 207                                 $criteria = $opcode . ' ' . $what . ' ';
 208                 break;
 209                 case '':        /* aflag */
 210                         $criteria = $opcode . ' ';
 211                 break;
 212                 case 'afield':  /* HEADER field-name: field-body */
 213                         preg_match('/^([^:]+):(.*)$/', $what, $what_parts);
 214                         if (count($what_parts) == 3)
 215                                 $criteria = $opcode . ' ' .
 216                                         sqimap_asearch_encode_string($what_parts[1], $charset) . ' ' .
 217                                         sqimap_asearch_encode_string($what_parts[2], $charset) . ' ';
 218                 break;
 219                 case 'adate':
 220                         $what_parts = sqimap_asearch_parse_date($what);
 221                         if (isset($what_parts[0]))
 222                                 $criteria = $opcode . ' ' . $what_parts[0] . ' ';
 223                 break;
 224                 case 'akeyword':
 225                 case 'astring':
 226                         $criteria = $opcode . ' ' . sqimap_asearch_encode_string($what, $charset) . ' ';
 227                 break;
 228                 case 'asequence':
 229                         $what = ereg_replace('[^0-9:\(\)]+', '', $what);
 230                         if ($what != '')
 231                                 $criteria = $opcode . ' ' . $what . ' ';
 232                 break;
 233         }
 234         return $criteria;
 235 }
 236
 237 function sqimap_run_search($imapConnection, $search_string, $search_charset)
 238 {
 239         global $uid_support;
 240
 241         /* 6.4.4 try OPTIONAL [CHARSET] specification first */
 242         if ($search_charset != '')
 243                 $query = 'SEARCH CHARSET "' . strtoupper($search_charset) . '" ALL ' . $search_string;
 244         else
 245                 $query = 'SEARCH ALL ' . $search_string;
 246         s_debug_dump('C:', $query);
 247         $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 248
 249         /* 6.4.4 try US-ASCII charset if we tried an OPTIONAL [CHARSET] and received a tagged NO response (SHOULD be [BADCHARSET]) */
 250         if (($search_charset != '')  && (strtoupper($response) == 'NO')) {
 251                 $query = 'SEARCH CHARSET US-ASCII ALL ' . $search_string;
 252                 s_debug_dump('C:', $query);
 253                 $readin = sqimap_run_command($imapConnection, $query, false, $response, $message, $uid_support);
 254         }
 255         if (strtoupper($response) != 'OK') {
 256                 sqimap_asearch_error_box($response, $query, $message);
 257                 return array();
 258         }
 259
 260         unset($messagelist);
 261
 262         /* Keep going till we find the SEARCH response */
 263         foreach ($readin as $readin_part) {
 264                 s_debug_dump('S:', $readin_part);
 265                 /* Check to see if a SEARCH response was received */
 266                 if (substr($readin_part, 0, 9) == '* SEARCH ') {
 267                         $messagelist = preg_split("/ /", substr($readin_part, 9));
 268                         break;  // Should be the last anyway
 269                 }
 270 /*      else {
 271                         if (isset($errors))
 272                                 $errors = $errors . $readin_part;
 273                         else
 274                                 $errors = $readin_part;
 275                 }*/
 276         }
 277
 278         /* If nothing is found * SEARCH should be the first error else echo errors */
 279 /*if (isset($errors)) {
 280                 if (strstr($errors,'* SEARCH'))
 281                         return array();
 282                 echo '<!-- ' . htmlspecialchars($errors) . ' -->';
 283         }*/
 284
 285         if (empty($messagelist))        //Empty search response, ie '* SEARCH'
 286                 return array();
 287
 288         $cnt = count($messagelist);
 289         for ($q = 0; $q < $cnt; $q++)
 290                 $id[$q] = trim($messagelist[$q]);
 291         return $id;
 292 }
 293
 294 function sqimap_asearch_get_charset()
 295 {
 296         global $allow_charset_search, $languages, $squirrelmail_language;
 297
 298         if ($allow_charset_search)
 299                 return $languages[$squirrelmail_language]['CHARSET'];
 300         return '';
 301 }
 302
 303 /* replaces $mbox_msgs[$search_mailbox] = array_values(array_unique(array_merge($mbox_msgs[$search_mailbox], sqimap_run_search($imapConnection, $search_string, $search_charset))));*/
 304 function sqimap_array_merge_unique($to, $from)
 305 {
 306         if (empty($to))
 307                 return $from;
 308         for ($i=0; $i<count($from); $i++) {
 309                 if (!in_array($from[$i], $to))
 310                         $to[] = $from[$i];
 311         }
 312         return $to;
 313 }
 314
 315 function sqimap_asearch($imapConnection, $mailbox_array, $biop_array, $unop_array, $where_array, $what_array, $exclude_array, $mboxes_array)
 316 {
 317         $search_charset = sqimap_asearch_get_charset();
 318         $mbox_msgs = array();
 319         $search_string = '';
 320         $cur_mailbox = $mailbox_array[0];
 321         $cur_biop = ''; /* Start with ALL */
 322         /* We loop one more time than the real array count, so the last search gets fired */
 323         for ($cur_crit = 0; $cur_crit <= count($where_array); $cur_crit++) {
 324                 if (empty($exclude_array[$cur_crit])) {
 325                         $next_mailbox = $mailbox_array[$cur_crit];
 326                         if ($next_mailbox != $cur_mailbox) {
 327                                 $search_string = trim($search_string);  /* Trim out last space */
 328                                 if (($cur_mailbox == 'All Folders') && (!empty($mboxes_array)))
 329                                         $search_mboxes = $mboxes_array;
 330                                 else
 331                                         $search_mboxes = array($cur_mailbox);
 332                                 foreach ($search_mboxes as $cur_mailbox) {
 333                                         s_debug_dump('C:SELECT:', $cur_mailbox);
 334                                         sqimap_mailbox_select($imapConnection, $cur_mailbox);
 335                                         if (isset($mbox_msgs[$cur_mailbox])) {
 336                                                 if ($cur_biop == 'OR')  /* Merge with previous results */
 337                                                         $mbox_msgs[$cur_mailbox] = sqimap_array_merge_unique($mbox_msgs[$cur_mailbox], sqimap_run_search($imapConnection, $search_string, $search_charset));
 338                                                 else    /* Intersect previous results */
 339                                                         $mbox_msgs[$cur_mailbox] = array_values(array_intersect(sqimap_run_search($imapConnection, $search_string, $search_charset), $mbox_msgs[$cur_mailbox]));
 340                                         }
 341                                         else /* No previous results */
 342                                                 $mbox_msgs[$cur_mailbox] = sqimap_run_search($imapConnection, $search_string, $search_charset);
 343                                         if (empty($mbox_msgs[$cur_mailbox]))    /* Can happen with intersect, and we need at the end a contiguous array */
 344                                                 unset($mbox_msgs[$cur_mailbox]);
 345                                 }
 346                                 $cur_mailbox = $next_mailbox;
 347                                 $search_string = '';
 348                         }
 349                         if (isset($where_array[$cur_crit])) {
 350                                 $criteria = sqimap_asearch_build_criteria($where_array[$cur_crit], $what_array[$cur_crit], $search_charset);
 351                                 if (!empty($criteria)) {
 352                                         $unop = $unop_array[$cur_crit];
 353                                         if (!empty($unop))
 354                                                 $criteria = $unop . ' ' . $criteria;
 355                                         /* We need to infix the next non-excluded criteria's biop if it's the same mailbox */
 356                                         $next_biop = '';
 357                                         for ($next_crit = $cur_crit+1; $next_crit <= count($where_array); $next_crit++) {
 358                                                 if (empty($exclude_array[$next_crit])) {
 359                                                         if (asearch_nz($mailbox_array[$next_crit]) == $cur_mailbox)
 360                                                                 $next_biop = asearch_nz($biop_array[$next_crit]);
 361                                                         break;
 362                                                 }
 363                                         }
 364                                         if ($next_biop == 'OR')
 365                                                 $criteria = $next_biop . ' ' . $criteria;
 366                                         $search_string .= $criteria;
 367                                         $cur_biop = asearch_nz($biop_array[$cur_crit]);
 368                                 }
 369                         }
 370                 }
 371         }
 372         return $mbox_msgs;
 373 }
 374
 375 ?>