| commit | author | age | ||
| 40c45e | 1 | <?php |
| A | 2 | |
| 3 | /* | |
| 4 | +-----------------------------------------------------------------------+ | |
| 5 | | This file is part of the Roundcube Webmail client | | |
| 6 | | Copyright (C) 2005-2011, The Roundcube Dev Team | | |
| 7 | | Copyright (C) 2011, Kolab Systems AG | | |
| 7fe381 | 8 | | | |
| T | 9 | | Licensed under the GNU General Public License version 3 or | |
| 10 | | any later version with exceptions for skins & plugins. | | |
| 11 | | See the README file for a full license statement. | | |
| 40c45e | 12 | | | |
| A | 13 | | PURPOSE: | |
| 14 | | THREAD response handler | | |
| 15 | +-----------------------------------------------------------------------+ | |
| 16 | | Author: Thomas Bruederli <roundcube@gmail.com> | | |
| 17 | | Author: Aleksander Machniak <alec@alec.pl> | | |
| 18 | +-----------------------------------------------------------------------+ | |
| 19 | */ | |
| 20 | ||
| 21 | /** | |
| 22 | * Class for accessing IMAP's THREAD result | |
| 9ab346 | 23 | * |
| AM | 24 | * @package Framework |
| 25 | * @subpackage Storage | |
| 40c45e | 26 | */ |
| A | 27 | class rcube_result_thread |
| 28 | { | |
| 31aa08 | 29 | public $incomplete = false; |
| TB | 30 | |
| c321a9 | 31 | protected $raw_data; |
| T | 32 | protected $mailbox; |
| 33 | protected $meta = array(); | |
| 34 | protected $order = 'ASC'; | |
| 40c45e | 35 | |
| A | 36 | const SEPARATOR_ELEMENT = ' '; |
| 37 | const SEPARATOR_ITEM = '~'; | |
| 38 | const SEPARATOR_LEVEL = ':'; | |
| 39 | ||
| 40 | ||
| 41 | /** | |
| 42 | * Object constructor. | |
| 43 | */ | |
| 44 | public function __construct($mailbox = null, $data = null) | |
| 45 | { | |
| 46 | $this->mailbox = $mailbox; | |
| 47 | $this->init($data); | |
| 48 | } | |
| 49 | ||
| 50 | ||
| 51 | /** | |
| 52 | * Initializes object with IMAP command response | |
| 53 | * | |
| 54 | * @param string $data IMAP response string | |
| 55 | */ | |
| 56 | public function init($data = null) | |
| 57 | { | |
| 58 | $this->meta = array(); | |
| 59 | ||
| 60 | $data = explode('*', (string)$data); | |
| 61 | ||
| 62 | // ...skip unilateral untagged server responses | |
| 63 | for ($i=0, $len=count($data); $i<$len; $i++) { | |
| 64 | if (preg_match('/^ THREAD/i', $data[$i])) { | |
| c093dc | 65 | // valid response, initialize raw_data for is_error() |
| AM | 66 | $this->raw_data = ''; |
| 40c45e | 67 | $data[$i] = substr($data[$i], 7); |
| A | 68 | break; |
| 69 | } | |
| 70 | ||
| 71 | unset($data[$i]); | |
| 72 | } | |
| 73 | ||
| 74 | if (empty($data)) { | |
| 75 | return; | |
| 76 | } | |
| 77 | ||
| 78 | $data = array_shift($data); | |
| 79 | $data = trim($data); | |
| 80 | $data = preg_replace('/[\r\n]/', '', $data); | |
| 81 | $data = preg_replace('/\s+/', ' ', $data); | |
| 82 | ||
| c321a9 | 83 | $this->raw_data = $this->parse_thread($data); |
| 40c45e | 84 | } |
| A | 85 | |
| 86 | ||
| 87 | /** | |
| 88 | * Checks the result from IMAP command | |
| 89 | * | |
| 90 | * @return bool True if the result is an error, False otherwise | |
| 91 | */ | |
| c321a9 | 92 | public function is_error() |
| 40c45e | 93 | { |
| A | 94 | return $this->raw_data === null ? true : false; |
| 95 | } | |
| 96 | ||
| 97 | ||
| 98 | /** | |
| 99 | * Checks if the result is empty | |
| 100 | * | |
| 101 | * @return bool True if the result is empty, False otherwise | |
| 102 | */ | |
| c321a9 | 103 | public function is_empty() |
| 40c45e | 104 | { |
| A | 105 | return empty($this->raw_data) ? true : false; |
| 106 | } | |
| 107 | ||
| 108 | ||
| 109 | /** | |
| 110 | * Returns number of elements (threads) in the result | |
| 111 | * | |
| 112 | * @return int Number of elements | |
| 113 | */ | |
| 114 | public function count() | |
| 115 | { | |
| 116 | if ($this->meta['count'] !== null) | |
| 117 | return $this->meta['count']; | |
| 118 | ||
| 119 | if (empty($this->raw_data)) { | |
| 120 | $this->meta['count'] = 0; | |
| 121 | } | |
| 889665 | 122 | else { |
| 40c45e | 123 | $this->meta['count'] = 1 + substr_count($this->raw_data, self::SEPARATOR_ELEMENT); |
| 889665 | 124 | } |
| 40c45e | 125 | |
| A | 126 | if (!$this->meta['count']) |
| 127 | $this->meta['messages'] = 0; | |
| 128 | ||
| 129 | return $this->meta['count']; | |
| 130 | } | |
| 131 | ||
| 132 | ||
| 133 | /** | |
| 134 | * Returns number of all messages in the result | |
| 135 | * | |
| 136 | * @return int Number of elements | |
| 137 | */ | |
| c321a9 | 138 | public function count_messages() |
| 40c45e | 139 | { |
| A | 140 | if ($this->meta['messages'] !== null) |
| 141 | return $this->meta['messages']; | |
| 142 | ||
| 143 | if (empty($this->raw_data)) { | |
| 144 | $this->meta['messages'] = 0; | |
| 145 | } | |
| 146 | else { | |
| 889665 | 147 | $this->meta['messages'] = 1 |
| A | 148 | + substr_count($this->raw_data, self::SEPARATOR_ELEMENT) |
| 149 | + substr_count($this->raw_data, self::SEPARATOR_ITEM); | |
| 40c45e | 150 | } |
| A | 151 | |
| 152 | if ($this->meta['messages'] == 0 || $this->meta['messages'] == 1) | |
| 153 | $this->meta['count'] = $this->meta['messages']; | |
| 154 | ||
| 155 | return $this->meta['messages']; | |
| 156 | } | |
| 157 | ||
| 158 | ||
| 159 | /** | |
| 160 | * Returns maximum message identifier in the result | |
| 161 | * | |
| 162 | * @return int Maximum message identifier | |
| 163 | */ | |
| 164 | public function max() | |
| 165 | { | |
| 166 | if (!isset($this->meta['max'])) { | |
| 167 | $this->meta['max'] = (int) @max($this->get()); | |
| 168 | } | |
| 169 | return $this->meta['max']; | |
| 170 | } | |
| 171 | ||
| 172 | ||
| 173 | /** | |
| 174 | * Returns minimum message identifier in the result | |
| 175 | * | |
| 176 | * @return int Minimum message identifier | |
| 177 | */ | |
| 178 | public function min() | |
| 179 | { | |
| 180 | if (!isset($this->meta['min'])) { | |
| 181 | $this->meta['min'] = (int) @min($this->get()); | |
| 182 | } | |
| 183 | return $this->meta['min']; | |
| 184 | } | |
| 185 | ||
| 186 | ||
| 187 | /** | |
| 188 | * Slices data set. | |
| 189 | * | |
| 190 | * @param $offset Offset (as for PHP's array_slice()) | |
| 191 | * @param $length Number of elements (as for PHP's array_slice()) | |
| 192 | */ | |
| 193 | public function slice($offset, $length) | |
| 194 | { | |
| 195 | $data = explode(self::SEPARATOR_ELEMENT, $this->raw_data); | |
| 196 | $data = array_slice($data, $offset, $length); | |
| 197 | ||
| 198 | $this->meta = array(); | |
| 199 | $this->meta['count'] = count($data); | |
| 200 | $this->raw_data = implode(self::SEPARATOR_ELEMENT, $data); | |
| 201 | } | |
| 202 | ||
| 203 | ||
| 204 | /** | |
| 205 | * Filters data set. Removes threads not listed in $roots list. | |
| 206 | * | |
| 207 | * @param array $roots List of IDs of thread roots. | |
| 208 | */ | |
| 209 | public function filter($roots) | |
| 210 | { | |
| 211 | $datalen = strlen($this->raw_data); | |
| 212 | $roots = array_flip($roots); | |
| 213 | $result = ''; | |
| 214 | $start = 0; | |
| 215 | ||
| 216 | $this->meta = array(); | |
| 217 | $this->meta['count'] = 0; | |
| 218 | ||
| 219 | while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) | |
| 220 | || ($start < $datalen && ($pos = $datalen)) | |
| 221 | ) { | |
| 222 | $len = $pos - $start; | |
| 223 | $elem = substr($this->raw_data, $start, $len); | |
| 224 | $start = $pos + 1; | |
| 225 | ||
| 226 | // extract root message ID | |
| 227 | if ($npos = strpos($elem, self::SEPARATOR_ITEM)) { | |
| 228 | $root = (int) substr($elem, 0, $npos); | |
| 229 | } | |
| 230 | else { | |
| 231 | $root = $elem; | |
| 232 | } | |
| 233 | ||
| 234 | if (isset($roots[$root])) { | |
| 235 | $this->meta['count']++; | |
| 236 | $result .= self::SEPARATOR_ELEMENT . $elem; | |
| 237 | } | |
| 238 | } | |
| 239 | ||
| 240 | $this->raw_data = ltrim($result, self::SEPARATOR_ELEMENT); | |
| 241 | } | |
| 242 | ||
| 243 | ||
| 244 | /** | |
| 245 | * Reverts order of elements in the result | |
| 246 | */ | |
| 247 | public function revert() | |
| 248 | { | |
| 249 | $this->order = $this->order == 'ASC' ? 'DESC' : 'ASC'; | |
| 250 | ||
| 251 | if (empty($this->raw_data)) { | |
| 252 | return; | |
| 253 | } | |
| 254 | ||
| 55d90b | 255 | $raw_data_reverse = implode(self::SEPARATOR_ELEMENT, array_reverse(explode(self::SEPARATOR_ELEMENT, $this->raw_data))); |
| BS | 256 | $this->raw_data = $raw_data_reverse; |
| 257 | ||
| 40c45e | 258 | $this->meta['pos'] = array(); |
| A | 259 | } |
| 260 | ||
| 261 | ||
| 262 | /** | |
| 263 | * Check if the given message ID exists in the object | |
| 264 | * | |
| 265 | * @param int $msgid Message ID | |
| 266 | * @param bool $get_index When enabled element's index will be returned. | |
| 267 | * Elements are indexed starting with 0 | |
| 268 | * | |
| 269 | * @return boolean True on success, False if message ID doesn't exist | |
| 270 | */ | |
| 271 | public function exists($msgid, $get_index = false) | |
| 272 | { | |
| 273 | $msgid = (int) $msgid; | |
| 274 | $begin = implode('|', array( | |
| 275 | '^', | |
| 276 | preg_quote(self::SEPARATOR_ELEMENT, '/'), | |
| 277 | preg_quote(self::SEPARATOR_LEVEL, '/'), | |
| 278 | )); | |
| 279 | $end = implode('|', array( | |
| 280 | '$', | |
| 281 | preg_quote(self::SEPARATOR_ELEMENT, '/'), | |
| 282 | preg_quote(self::SEPARATOR_ITEM, '/'), | |
| 283 | )); | |
| 284 | ||
| 285 | if (preg_match("/($begin)$msgid($end)/", $this->raw_data, $m, | |
| 286 | $get_index ? PREG_OFFSET_CAPTURE : null) | |
| 287 | ) { | |
| 288 | if ($get_index) { | |
| 289 | $idx = 0; | |
| 290 | if ($m[0][1]) { | |
| 291 | $idx = substr_count($this->raw_data, self::SEPARATOR_ELEMENT, 0, $m[0][1]+1) | |
| 292 | + substr_count($this->raw_data, self::SEPARATOR_ITEM, 0, $m[0][1]+1); | |
| 293 | } | |
| c321a9 | 294 | // cache position of this element, so we can use it in get_element() |
| 40c45e | 295 | $this->meta['pos'][$idx] = (int)$m[0][1]; |
| A | 296 | |
| 297 | return $idx; | |
| 298 | } | |
| 299 | return true; | |
| 300 | } | |
| 301 | ||
| 302 | return false; | |
| 303 | } | |
| 304 | ||
| 305 | ||
| 306 | /** | |
| 307 | * Return IDs of all messages in the result. Threaded data will be flattened. | |
| 308 | * | |
| 309 | * @return array List of message identifiers | |
| 310 | */ | |
| 311 | public function get() | |
| 312 | { | |
| 313 | if (empty($this->raw_data)) { | |
| 314 | return array(); | |
| 315 | } | |
| 316 | ||
| 317 | $regexp = '/(' . preg_quote(self::SEPARATOR_ELEMENT, '/') | |
| 318 | . '|' . preg_quote(self::SEPARATOR_ITEM, '/') . '[0-9]+' . preg_quote(self::SEPARATOR_LEVEL, '/') | |
| 319 | .')/'; | |
| 320 | ||
| 321 | return preg_split($regexp, $this->raw_data); | |
| 322 | } | |
| 323 | ||
| 324 | ||
| 325 | /** | |
| 326 | * Return all messages in the result. | |
| 327 | * | |
| 328 | * @return array List of message identifiers | |
| 329 | */ | |
| c321a9 | 330 | public function get_compressed() |
| 40c45e | 331 | { |
| A | 332 | if (empty($this->raw_data)) { |
| 333 | return ''; | |
| 334 | } | |
| 335 | ||
| 336 | return rcube_imap_generic::compressMessageSet($this->get()); | |
| 337 | } | |
| 338 | ||
| 339 | ||
| 340 | /** | |
| 341 | * Return result element at specified index (all messages, not roots) | |
| 342 | * | |
| 343 | * @param int|string $index Element's index or "FIRST" or "LAST" | |
| 344 | * | |
| 345 | * @return int Element value | |
| 346 | */ | |
| c321a9 | 347 | public function get_element($index) |
| 40c45e | 348 | { |
| A | 349 | $count = $this->count(); |
| 350 | ||
| 351 | if (!$count) { | |
| 352 | return null; | |
| 353 | } | |
| 354 | ||
| 355 | // first element | |
| 356 | if ($index === 0 || $index === '0' || $index === 'FIRST') { | |
| 357 | preg_match('/^([0-9]+)/', $this->raw_data, $m); | |
| 358 | $result = (int) $m[1]; | |
| 359 | return $result; | |
| 360 | } | |
| 361 | ||
| 362 | // last element | |
| 363 | if ($index === 'LAST' || $index == $count-1) { | |
| 364 | preg_match('/([0-9]+)$/', $this->raw_data, $m); | |
| 365 | $result = (int) $m[1]; | |
| 366 | return $result; | |
| 367 | } | |
| 368 | ||
| 369 | // do we know the position of the element or the neighbour of it? | |
| 370 | if (!empty($this->meta['pos'])) { | |
| 371 | $element = preg_quote(self::SEPARATOR_ELEMENT, '/'); | |
| 372 | $item = preg_quote(self::SEPARATOR_ITEM, '/') . '[0-9]+' . preg_quote(self::SEPARATOR_LEVEL, '/') .'?'; | |
| 373 | $regexp = '(' . $element . '|' . $item . ')'; | |
| 374 | ||
| 375 | if (isset($this->meta['pos'][$index])) { | |
| 376 | if (preg_match('/([0-9]+)/', $this->raw_data, $m, null, $this->meta['pos'][$index])) | |
| 377 | $result = $m[1]; | |
| 378 | } | |
| 379 | else if (isset($this->meta['pos'][$index-1])) { | |
| 380 | // get chunk of data after previous element | |
| 381 | $data = substr($this->raw_data, $this->meta['pos'][$index-1]+1, 50); | |
| 382 | $data = preg_replace('/^[0-9]+/', '', $data); // remove UID at $index position | |
| 383 | $data = preg_replace("/^$regexp/", '', $data); // remove separator | |
| 384 | if (preg_match('/^([0-9]+)/', $data, $m)) | |
| 385 | $result = $m[1]; | |
| 386 | } | |
| 387 | else if (isset($this->meta['pos'][$index+1])) { | |
| 388 | // get chunk of data before next element | |
| 389 | $pos = max(0, $this->meta['pos'][$index+1] - 50); | |
| 390 | $len = min(50, $this->meta['pos'][$index+1]); | |
| 391 | $data = substr($this->raw_data, $pos, $len); | |
| 392 | $data = preg_replace("/$regexp\$/", '', $data); // remove separator | |
| 393 | ||
| 394 | if (preg_match('/([0-9]+)$/', $data, $m)) | |
| 395 | $result = $m[1]; | |
| 396 | } | |
| 397 | ||
| 398 | if (isset($result)) { | |
| 399 | return (int) $result; | |
| 400 | } | |
| 401 | } | |
| 402 | ||
| 403 | // Finally use less effective method | |
| 404 | $data = $this->get(); | |
| 405 | ||
| 406 | return $data[$index]; | |
| 407 | } | |
| 408 | ||
| 409 | ||
| 410 | /** | |
| 411 | * Returns response parameters e.g. MAILBOX, ORDER | |
| 412 | * | |
| 413 | * @param string $param Parameter name | |
| 414 | * | |
| 415 | * @return array|string Response parameters or parameter value | |
| 416 | */ | |
| c321a9 | 417 | public function get_parameters($param=null) |
| 40c45e | 418 | { |
| A | 419 | $params = $this->params; |
| 420 | $params['MAILBOX'] = $this->mailbox; | |
| 421 | $params['ORDER'] = $this->order; | |
| 422 | ||
| 423 | if ($param !== null) { | |
| 424 | return $params[$param]; | |
| 425 | } | |
| 426 | ||
| 427 | return $params; | |
| 428 | } | |
| 429 | ||
| 430 | ||
| 431 | /** | |
| 432 | * THREAD=REFS sorting implementation (based on provided index) | |
| 433 | * | |
| 434 | * @param rcube_result_index $index Sorted message identifiers | |
| 435 | */ | |
| 436 | public function sort($index) | |
| 437 | { | |
| c321a9 | 438 | $this->sort_order = $index->get_parameters('ORDER'); |
| 40c45e | 439 | |
| A | 440 | if (empty($this->raw_data)) { |
| 441 | return; | |
| 442 | } | |
| 443 | ||
| 444 | // when sorting search result it's good to make the index smaller | |
| c321a9 | 445 | if ($index->count() != $this->count_messages()) { |
| 3b1d41 | 446 | $index->filter($this->get()); |
| 40c45e | 447 | } |
| A | 448 | |
| 449 | $result = array_fill_keys($index->get(), null); | |
| 450 | $datalen = strlen($this->raw_data); | |
| 451 | $start = 0; | |
| 452 | ||
| 453 | // Here we're parsing raw_data twice, we want only one big array | |
| 454 | // in memory at a time | |
| 455 | ||
| 456 | // Assign roots | |
| 457 | while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) | |
| 458 | || ($start < $datalen && ($pos = $datalen)) | |
| 459 | ) { | |
| 460 | $len = $pos - $start; | |
| 461 | $elem = substr($this->raw_data, $start, $len); | |
| 462 | $start = $pos + 1; | |
| 463 | ||
| 464 | $items = explode(self::SEPARATOR_ITEM, $elem); | |
| 465 | $root = (int) array_shift($items); | |
| 466 | ||
| 485f23 | 467 | if ($root) { |
| AM | 468 | $result[$root] = $root; |
| 469 | foreach ($items as $item) { | |
| 470 | list($lv, $id) = explode(self::SEPARATOR_LEVEL, $item); | |
| 40c45e | 471 | $result[$id] = $root; |
| 485f23 | 472 | } |
| 40c45e | 473 | } |
| A | 474 | } |
| 475 | ||
| 476 | // get only unique roots | |
| 477 | $result = array_filter($result); // make sure there are no nulls | |
| 485f23 | 478 | $result = array_unique($result); |
| 40c45e | 479 | |
| A | 480 | // Re-sort raw data |
| 481 | $result = array_fill_keys($result, null); | |
| 482 | $start = 0; | |
| 483 | ||
| 484 | while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) | |
| 485 | || ($start < $datalen && ($pos = $datalen)) | |
| 486 | ) { | |
| 487 | $len = $pos - $start; | |
| 488 | $elem = substr($this->raw_data, $start, $len); | |
| 489 | $start = $pos + 1; | |
| 490 | ||
| 491 | $npos = strpos($elem, self::SEPARATOR_ITEM); | |
| 492 | $root = (int) ($npos ? substr($elem, 0, $npos) : $elem); | |
| 493 | ||
| 494 | $result[$root] = $elem; | |
| 495 | } | |
| 496 | ||
| 497 | $this->raw_data = implode(self::SEPARATOR_ELEMENT, $result); | |
| 498 | } | |
| 499 | ||
| 500 | ||
| 501 | /** | |
| 502 | * Returns data as tree | |
| 503 | * | |
| 504 | * @return array Data tree | |
| 505 | */ | |
| c321a9 | 506 | public function get_tree() |
| 40c45e | 507 | { |
| A | 508 | $datalen = strlen($this->raw_data); |
| 509 | $result = array(); | |
| 510 | $start = 0; | |
| 511 | ||
| 512 | while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) | |
| 513 | || ($start < $datalen && ($pos = $datalen)) | |
| 514 | ) { | |
| 515 | $len = $pos - $start; | |
| 516 | $elem = substr($this->raw_data, $start, $len); | |
| 517 | $items = explode(self::SEPARATOR_ITEM, $elem); | |
| c321a9 | 518 | $result[array_shift($items)] = $this->build_thread($items); |
| 40c45e | 519 | $start = $pos + 1; |
| A | 520 | } |
| 521 | ||
| 522 | return $result; | |
| 523 | } | |
| 524 | ||
| 525 | ||
| 526 | /** | |
| 527 | * Returns thread depth and children data | |
| 528 | * | |
| 529 | * @return array Thread data | |
| 530 | */ | |
| c321a9 | 531 | public function get_thread_data() |
| 40c45e | 532 | { |
| c321a9 | 533 | $data = $this->get_tree(); |
| 40c45e | 534 | $depth = array(); |
| A | 535 | $children = array(); |
| 536 | ||
| c321a9 | 537 | $this->build_thread_data($data, $depth, $children); |
| 40c45e | 538 | |
| A | 539 | return array($depth, $children); |
| 540 | } | |
| 541 | ||
| 542 | ||
| 543 | /** | |
| 544 | * Creates 'depth' and 'children' arrays from stored thread 'tree' data. | |
| 545 | */ | |
| c321a9 | 546 | protected function build_thread_data($data, &$depth, &$children, $level = 0) |
| 40c45e | 547 | { |
| A | 548 | foreach ((array)$data as $key => $val) { |
| fd43a9 | 549 | $empty = empty($val) || !is_array($val); |
| A | 550 | $children[$key] = !$empty; |
| 551 | $depth[$key] = $level; | |
| 552 | if (!$empty) { | |
| c321a9 | 553 | $this->build_thread_data($val, $depth, $children, $level + 1); |
| fd43a9 | 554 | } |
| 40c45e | 555 | } |
| A | 556 | } |
| 557 | ||
| 558 | ||
| 559 | /** | |
| 560 | * Converts part of the raw thread into an array | |
| 561 | */ | |
| c321a9 | 562 | protected function build_thread($items, $level = 1, &$pos = 0) |
| 40c45e | 563 | { |
| A | 564 | $result = array(); |
| 565 | ||
| 566 | for ($len=count($items); $pos < $len; $pos++) { | |
| 567 | list($lv, $id) = explode(self::SEPARATOR_LEVEL, $items[$pos]); | |
| 568 | if ($level == $lv) { | |
| 569 | $pos++; | |
| c321a9 | 570 | $result[$id] = $this->build_thread($items, $level+1, $pos); |
| 40c45e | 571 | } |
| A | 572 | else { |
| 573 | $pos--; | |
| 574 | break; | |
| 575 | } | |
| 576 | } | |
| 577 | ||
| 578 | return $result; | |
| 579 | } | |
| 580 | ||
| 581 | ||
| 582 | /** | |
| 583 | * IMAP THREAD response parser | |
| 584 | */ | |
| c321a9 | 585 | protected function parse_thread($str, $begin = 0, $end = 0, $depth = 0) |
| 40c45e | 586 | { |
| A | 587 | // Don't be tempted to change $str to pass by reference to speed this up - it will slow it down by about |
| 588 | // 7 times instead :-) See comments on http://uk2.php.net/references and this article: | |
| 589 | // http://derickrethans.nl/files/phparch-php-variables-article.pdf | |
| 590 | $node = ''; | |
| 591 | if (!$end) { | |
| 592 | $end = strlen($str); | |
| 593 | } | |
| 594 | ||
| 595 | // Let's try to store data in max. compacted stracture as a string, | |
| 596 | // arrays handling is much more expensive | |
| 597 | // For the following structure: THREAD (2)(3 6 (4 23)(44 7 96)) | |
| 598 | // -- 2 | |
| 599 | // -- 3 | |
| 600 | // \-- 6 | |
| 601 | // |-- 4 | |
| 602 | // | \-- 23 | |
| 603 | // | | |
| 604 | // \-- 44 | |
| 1fd6c4 | 605 | // \-- 7 |
| AM | 606 | // \-- 96 |
| 40c45e | 607 | // |
| A | 608 | // The output will be: 2,3^1:6^2:4^3:23^2:44^3:7^4:96 |
| 609 | ||
| 610 | if ($str[$begin] != '(') { | |
| 1fd6c4 | 611 | // find next bracket |
| AM | 612 | $stop = $begin + strcspn($str, '()', $begin, $end - $begin); |
| 613 | $messages = explode(' ', trim(substr($str, $begin, $stop - $begin))); | |
| 614 | ||
| 615 | if (empty($messages)) { | |
| 40c45e | 616 | return $node; |
| A | 617 | } |
| 618 | ||
| 1fd6c4 | 619 | foreach ($messages as $msg) { |
| AM | 620 | if ($msg) { |
| 621 | $node .= ($depth ? self::SEPARATOR_ITEM.$depth.self::SEPARATOR_LEVEL : '').$msg; | |
| 622 | $this->meta['messages']++; | |
| 623 | $depth++; | |
| 624 | } | |
| 40c45e | 625 | } |
| 1fd6c4 | 626 | |
| AM | 627 | if ($stop < $end) { |
| 628 | $node .= $this->parse_thread($str, $stop, $end, $depth); | |
| 629 | } | |
| 630 | } | |
| 631 | else { | |
| 40c45e | 632 | $off = $begin; |
| A | 633 | while ($off < $end) { |
| 634 | $start = $off; | |
| 635 | $off++; | |
| 636 | $n = 1; | |
| 637 | while ($n > 0) { | |
| 638 | $p = strpos($str, ')', $off); | |
| 639 | if ($p === false) { | |
| 640 | // error, wrong structure, mismatched brackets in IMAP THREAD response | |
| 641 | // @TODO: write error to the log or maybe set $this->raw_data = null; | |
| 642 | return $node; | |
| 643 | } | |
| 644 | $p1 = strpos($str, '(', $off); | |
| 645 | if ($p1 !== false && $p1 < $p) { | |
| 646 | $off = $p1 + 1; | |
| 647 | $n++; | |
| 1fd6c4 | 648 | } |
| AM | 649 | else { |
| 40c45e | 650 | $off = $p + 1; |
| A | 651 | $n--; |
| 652 | } | |
| 653 | } | |
| 654 | ||
| c321a9 | 655 | $thread = $this->parse_thread($str, $start + 1, $off - 1, $depth); |
| 40c45e | 656 | if ($thread) { |
| A | 657 | if (!$depth) { |
| 658 | if ($node) { | |
| 659 | $node .= self::SEPARATOR_ELEMENT; | |
| 660 | } | |
| 661 | } | |
| 662 | $node .= $thread; | |
| 663 | } | |
| 664 | } | |
| 665 | } | |
| 666 | ||
| 667 | return $node; | |
| 668 | } | |
| 669 | } | |
