| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* +-----------------------------------------------------------------------+ |
| 5 |
* | This file is part of the Roundcube Webmail client | |
| 6 |
* | | |
| 7 |
* | Copyright (C) The Roundcube Dev Team | |
| 8 |
* | Copyright (C) Kolab Systems AG | |
| 9 |
* | | |
| 10 |
* | Licensed under the GNU General Public License version 3 or | |
| 11 |
* | any later version with exceptions for skins & plugins. | |
| 12 |
* | See the README file for a full license statement. | |
| 13 |
* | | |
| 14 |
* | PURPOSE: | |
| 15 |
* | THREAD response handler | |
| 16 |
* +-----------------------------------------------------------------------+ |
| 17 |
* | Author: Thomas Bruederli <[email protected]> | |
| 18 |
* | Author: Aleksander Machniak <[email protected]> | |
| 19 |
* +-----------------------------------------------------------------------+ |
| 20 |
*/ |
| 21 |
|
| 22 |
namespace AcyMailing\Libraries\Imap2\Roundcube; |
| 23 |
|
| 24 |
use AcyMailing\Libraries\Imap2\Offset; |
| 25 |
use AcyMailing\Libraries\Imap2\rcube_imap_generic; |
| 26 |
use AcyMailing\Libraries\Imap2\rcube_result_index; |
| 27 |
|
| 28 |
/** |
| 29 |
* Class for accessing IMAP's THREAD result |
| 30 |
* |
| 31 |
* @package Framework |
| 32 |
* @subpackage Storage |
| 33 |
*/ |
| 34 |
class ResultThread |
| 35 |
{ |
| 36 |
public $incomplete = false; |
| 37 |
|
| 38 |
protected $raw_data; |
| 39 |
protected $mailbox; |
| 40 |
protected $meta = []; |
| 41 |
protected $order = 'ASC'; |
| 42 |
|
| 43 |
const SEPARATOR_ELEMENT = ' '; |
| 44 |
const SEPARATOR_ITEM = '~'; |
| 45 |
const SEPARATOR_LEVEL = ':'; |
| 46 |
|
| 47 |
|
| 48 |
/** |
| 49 |
* Object constructor. |
| 50 |
*/ |
| 51 |
public function __construct($mailbox = null, $data = null) |
| 52 |
{ |
| 53 |
$this->mailbox = $mailbox; |
| 54 |
$this->init($data); |
| 55 |
} |
| 56 |
|
| 57 |
/** |
| 58 |
* Initializes object with IMAP command response |
| 59 |
* |
| 60 |
* @param string $data IMAP response string |
| 61 |
*/ |
| 62 |
public function init($data = null) |
| 63 |
{ |
| 64 |
$this->meta = []; |
| 65 |
|
| 66 |
$data = explode('*', (string)$data); |
| 67 |
|
| 68 |
// ...skip unilateral untagged server responses |
| 69 |
for ($i = 0, $len = count($data) ; $i < $len ; $i++) { |
| 70 |
if (preg_match('/^ THREAD/i', $data[$i])) { |
| 71 |
// valid response, initialize raw_data for is_error() |
| 72 |
$this->raw_data = ''; |
| 73 |
$data[$i] = substr($data[$i], 7); |
| 74 |
break; |
| 75 |
} |
| 76 |
|
| 77 |
unset($data[$i]); |
| 78 |
} |
| 79 |
|
| 80 |
if (empty($data)) { |
| 81 |
return; |
| 82 |
} |
| 83 |
|
| 84 |
$data = array_shift($data); |
| 85 |
$data = trim($data); |
| 86 |
$data = preg_replace('/[\r\n]/', '', $data); |
| 87 |
$data = preg_replace('/\s+/', ' ', $data); |
| 88 |
|
| 89 |
$this->raw_data = $this->parse_thread($data); |
| 90 |
} |
| 91 |
|
| 92 |
/** |
| 93 |
* Checks the result from IMAP command |
| 94 |
* |
| 95 |
* @return bool True if the result is an error, False otherwise |
| 96 |
*/ |
| 97 |
public function is_error() |
| 98 |
{ |
| 99 |
return $this->raw_data === null; |
| 100 |
} |
| 101 |
|
| 102 |
/** |
| 103 |
* Checks if the result is empty |
| 104 |
* |
| 105 |
* @return bool True if the result is empty, False otherwise |
| 106 |
*/ |
| 107 |
public function is_empty() |
| 108 |
{ |
| 109 |
return empty($this->raw_data); |
| 110 |
} |
| 111 |
|
| 112 |
/** |
| 113 |
* Returns number of elements (threads) in the result |
| 114 |
* |
| 115 |
* @return int Number of elements |
| 116 |
*/ |
| 117 |
public function count() |
| 118 |
{ |
| 119 |
if (isset($this->meta['count']) && $this->meta['count'] !== null) { |
| 120 |
return $this->meta['count']; |
| 121 |
} |
| 122 |
|
| 123 |
if (empty($this->raw_data)) { |
| 124 |
$this->meta['count'] = 0; |
| 125 |
} else { |
| 126 |
$this->meta['count'] = 1 + substr_count($this->raw_data, self::SEPARATOR_ELEMENT); |
| 127 |
} |
| 128 |
|
| 129 |
if (!$this->meta['count']) { |
| 130 |
$this->meta['messages'] = 0; |
| 131 |
} |
| 132 |
|
| 133 |
return $this->meta['count']; |
| 134 |
} |
| 135 |
|
| 136 |
/** |
| 137 |
* Returns number of all messages in the result |
| 138 |
* |
| 139 |
* @return int Number of elements |
| 140 |
*/ |
| 141 |
public function count_messages() |
| 142 |
{ |
| 143 |
if ($this->meta['messages'] !== null) { |
| 144 |
return $this->meta['messages']; |
| 145 |
} |
| 146 |
|
| 147 |
if (empty($this->raw_data)) { |
| 148 |
$this->meta['messages'] = 0; |
| 149 |
} else { |
| 150 |
$this->meta['messages'] = 1 |
| 151 |
+ substr_count($this->raw_data, self::SEPARATOR_ELEMENT) |
| 152 |
+ substr_count($this->raw_data, self::SEPARATOR_ITEM); |
| 153 |
} |
| 154 |
|
| 155 |
if ($this->meta['messages'] == 0 || $this->meta['messages'] == 1) { |
| 156 |
$this->meta['count'] = $this->meta['messages']; |
| 157 |
} |
| 158 |
|
| 159 |
return $this->meta['messages']; |
| 160 |
} |
| 161 |
|
| 162 |
/** |
| 163 |
* Returns maximum message identifier in the result |
| 164 |
* |
| 165 |
* @return int Maximum message identifier |
| 166 |
*/ |
| 167 |
public function max() |
| 168 |
{ |
| 169 |
if (!isset($this->meta['max'])) { |
| 170 |
$this->meta['max'] = (int)@max($this->get()); |
| 171 |
} |
| 172 |
|
| 173 |
return $this->meta['max']; |
| 174 |
} |
| 175 |
|
| 176 |
/** |
| 177 |
* Returns minimum message identifier in the result |
| 178 |
* |
| 179 |
* @return int Minimum message identifier |
| 180 |
*/ |
| 181 |
public function min() |
| 182 |
{ |
| 183 |
if (!isset($this->meta['min'])) { |
| 184 |
$this->meta['min'] = (int)@min($this->get()); |
| 185 |
} |
| 186 |
|
| 187 |
return $this->meta['min']; |
| 188 |
} |
| 189 |
|
| 190 |
/** |
| 191 |
* Slices data set. |
| 192 |
* |
| 193 |
* @param $offset Offset (as for PHP's array_slice()) |
| 194 |
* @param $length Number of elements (as for PHP's array_slice()) |
| 195 |
*/ |
| 196 |
public function slice($offset, $length) |
| 197 |
{ |
| 198 |
$data = explode(self::SEPARATOR_ELEMENT, $this->raw_data); |
| 199 |
$data = array_slice($data, $offset, $length); |
| 200 |
|
| 201 |
$this->meta = []; |
| 202 |
$this->meta['count'] = count($data); |
| 203 |
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $data); |
| 204 |
} |
| 205 |
|
| 206 |
/** |
| 207 |
* Filters data set. Removes threads not listed in $roots list. |
| 208 |
* |
| 209 |
* @param array $roots List of IDs of thread roots. |
| 210 |
*/ |
| 211 |
public function filter($roots) |
| 212 |
{ |
| 213 |
$datalen = strlen($this->raw_data); |
| 214 |
$roots = array_flip($roots); |
| 215 |
$result = ''; |
| 216 |
$start = 0; |
| 217 |
|
| 218 |
$this->meta = []; |
| 219 |
$this->meta['count'] = 0; |
| 220 |
|
| 221 |
while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) |
| 222 |
|| ($start < $datalen && ($pos = $datalen)) |
| 223 |
) { |
| 224 |
$len = $pos - $start; |
| 225 |
$elem = substr($this->raw_data, $start, $len); |
| 226 |
$start = $pos + 1; |
| 227 |
|
| 228 |
// extract root message ID |
| 229 |
if ($npos = strpos($elem, self::SEPARATOR_ITEM)) { |
| 230 |
$root = (int)substr($elem, 0, $npos); |
| 231 |
} else { |
| 232 |
$root = $elem; |
| 233 |
} |
| 234 |
|
| 235 |
if (isset($roots[$root])) { |
| 236 |
$this->meta['count']++; |
| 237 |
$result .= self::SEPARATOR_ELEMENT.$elem; |
| 238 |
} |
| 239 |
} |
| 240 |
|
| 241 |
$this->raw_data = ltrim($result, self::SEPARATOR_ELEMENT); |
| 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 |
|
| 255 |
$data = explode(self::SEPARATOR_ELEMENT, $this->raw_data); |
| 256 |
$data = array_reverse($data); |
| 257 |
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $data); |
| 258 |
|
| 259 |
$this->meta['pos'] = []; |
| 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('|', [ |
| 275 |
'^', |
| 276 |
preg_quote(self::SEPARATOR_ELEMENT, '/'), |
| 277 |
preg_quote(self::SEPARATOR_LEVEL, '/'), |
| 278 |
]); |
| 279 |
$end = implode('|', [ |
| 280 |
'$', |
| 281 |
preg_quote(self::SEPARATOR_ELEMENT, '/'), |
| 282 |
preg_quote(self::SEPARATOR_ITEM, '/'), |
| 283 |
]); |
| 284 |
|
| 285 |
if (preg_match( |
| 286 |
"/($begin)$msgid($end)/", |
| 287 |
$this->raw_data, |
| 288 |
$m, |
| 289 |
$get_index ? PREG_OFFSET_CAPTURE : null |
| 290 |
) |
| 291 |
) { |
| 292 |
if ($get_index) { |
| 293 |
$idx = 0; |
| 294 |
if ($m[0][1]) { |
| 295 |
$idx = substr_count($this->raw_data, self::SEPARATOR_ELEMENT, 0, $m[0][1] + 1) |
| 296 |
+ substr_count($this->raw_data, self::SEPARATOR_ITEM, 0, $m[0][1] + 1); |
| 297 |
} |
| 298 |
// cache position of this element, so we can use it in get_element() |
| 299 |
$this->meta['pos'][$idx] = (int)$m[0][1]; |
| 300 |
|
| 301 |
return $idx; |
| 302 |
} |
| 303 |
|
| 304 |
return true; |
| 305 |
} |
| 306 |
|
| 307 |
return false; |
| 308 |
} |
| 309 |
|
| 310 |
/** |
| 311 |
* Return IDs of all messages in the result. Threaded data will be flattened. |
| 312 |
* |
| 313 |
* @return array List of message identifiers |
| 314 |
*/ |
| 315 |
public function get() |
| 316 |
{ |
| 317 |
if (empty($this->raw_data)) { |
| 318 |
return []; |
| 319 |
} |
| 320 |
|
| 321 |
$regexp = '/('.preg_quote(self::SEPARATOR_ELEMENT, '/') |
| 322 |
.'|'.preg_quote(self::SEPARATOR_ITEM, '/').'[0-9]+'.preg_quote(self::SEPARATOR_LEVEL, '/') |
| 323 |
.')/'; |
| 324 |
|
| 325 |
return preg_split($regexp, $this->raw_data); |
| 326 |
} |
| 327 |
|
| 328 |
/** |
| 329 |
* Return all messages in the result. |
| 330 |
* |
| 331 |
* @return array List of message identifiers |
| 332 |
*/ |
| 333 |
public function get_compressed() |
| 334 |
{ |
| 335 |
if (empty($this->raw_data)) { |
| 336 |
return ''; |
| 337 |
} |
| 338 |
|
| 339 |
return rcube_imap_generic::compressMessageSet($this->get()); |
| 340 |
} |
| 341 |
|
| 342 |
/** |
| 343 |
* Return result element at specified index (all messages, not roots) |
| 344 |
* |
| 345 |
* @param int|string $index Element's index or "FIRST" or "LAST" |
| 346 |
* |
| 347 |
* @return int Element value |
| 348 |
*/ |
| 349 |
public function get_element($index) |
| 350 |
{ |
| 351 |
$count = $this->count(); |
| 352 |
|
| 353 |
if (!$count) { |
| 354 |
return null; |
| 355 |
} |
| 356 |
|
| 357 |
// first element |
| 358 |
if ($index === 0 || $index === '0' || $index === 'FIRST') { |
| 359 |
preg_match('/^([0-9]+)/', $this->raw_data, $m); |
| 360 |
$result = (int)$m[1]; |
| 361 |
|
| 362 |
return $result; |
| 363 |
} |
| 364 |
|
| 365 |
// last element |
| 366 |
if ($index === 'LAST' || $index == $count - 1) { |
| 367 |
preg_match('/([0-9]+)$/', $this->raw_data, $m); |
| 368 |
$result = (int)$m[1]; |
| 369 |
|
| 370 |
return $result; |
| 371 |
} |
| 372 |
|
| 373 |
// do we know the position of the element or the neighbour of it? |
| 374 |
if (!empty($this->meta['pos'])) { |
| 375 |
$element = preg_quote(self::SEPARATOR_ELEMENT, '/'); |
| 376 |
$item = preg_quote(self::SEPARATOR_ITEM, '/').'[0-9]+'.preg_quote(self::SEPARATOR_LEVEL, '/').'?'; |
| 377 |
$regexp = '('.$element.'|'.$item.')'; |
| 378 |
|
| 379 |
if (isset($this->meta['pos'][$index])) { |
| 380 |
if (preg_match('/([0-9]+)/', $this->raw_data, $m, null, $this->meta['pos'][$index])) { |
| 381 |
$result = $m[1]; |
| 382 |
} |
| 383 |
} elseif (isset($this->meta['pos'][$index - 1])) { |
| 384 |
// get chunk of data after previous element |
| 385 |
$data = substr($this->raw_data, $this->meta['pos'][$index - 1] + 1, 50); |
| 386 |
$data = preg_replace('/^[0-9]+/', '', $data); // remove UID at $index position |
| 387 |
$data = preg_replace("/^$regexp/", '', $data); // remove separator |
| 388 |
if (preg_match('/^([0-9]+)/', $data, $m)) { |
| 389 |
$result = $m[1]; |
| 390 |
} |
| 391 |
} elseif (isset($this->meta['pos'][$index + 1])) { |
| 392 |
// get chunk of data before next element |
| 393 |
$pos = max(0, $this->meta['pos'][$index + 1] - 50); |
| 394 |
$len = min(50, $this->meta['pos'][$index + 1]); |
| 395 |
$data = substr($this->raw_data, $pos, $len); |
| 396 |
$data = preg_replace("/$regexp\$/", '', $data); // remove separator |
| 397 |
|
| 398 |
if (preg_match('/([0-9]+)$/', $data, $m)) { |
| 399 |
$result = $m[1]; |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
if (isset($result)) { |
| 404 |
return (int)$result; |
| 405 |
} |
| 406 |
} |
| 407 |
|
| 408 |
// Finally use less effective method |
| 409 |
$data = $this->get(); |
| 410 |
|
| 411 |
return $data[$index]; |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* Returns response parameters e.g. MAILBOX, ORDER |
| 416 |
* |
| 417 |
* @param string $param Parameter name |
| 418 |
* |
| 419 |
* @return array|string Response parameters or parameter value |
| 420 |
*/ |
| 421 |
public function get_parameters($param = null) |
| 422 |
{ |
| 423 |
$params = []; |
| 424 |
$params['MAILBOX'] = $this->mailbox; |
| 425 |
$params['ORDER'] = $this->order; |
| 426 |
|
| 427 |
if ($param !== null) { |
| 428 |
return $params[$param]; |
| 429 |
} |
| 430 |
|
| 431 |
return $params; |
| 432 |
} |
| 433 |
|
| 434 |
/** |
| 435 |
* THREAD=REFS sorting implementation (based on provided index) |
| 436 |
* |
| 437 |
* @param rcube_result_index $index Sorted message identifiers |
| 438 |
*/ |
| 439 |
public function sort($index) |
| 440 |
{ |
| 441 |
$this->sort_order = $index->get_parameters('ORDER'); |
| 442 |
|
| 443 |
if (empty($this->raw_data)) { |
| 444 |
return; |
| 445 |
} |
| 446 |
|
| 447 |
// when sorting search result it's good to make the index smaller |
| 448 |
if ($index->count() != $this->count_messages()) { |
| 449 |
$index->filter($this->get()); |
| 450 |
} |
| 451 |
|
| 452 |
$result = array_fill_keys($index->get(), null); |
| 453 |
$datalen = strlen($this->raw_data); |
| 454 |
$start = 0; |
| 455 |
|
| 456 |
// Here we're parsing raw_data twice, we want only one big array |
| 457 |
// in memory at a time |
| 458 |
|
| 459 |
// Assign roots |
| 460 |
while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) |
| 461 |
|| ($start < $datalen && ($pos = $datalen)) |
| 462 |
) { |
| 463 |
$len = $pos - $start; |
| 464 |
$elem = substr($this->raw_data, $start, $len); |
| 465 |
$start = $pos + 1; |
| 466 |
|
| 467 |
$items = explode(self::SEPARATOR_ITEM, $elem); |
| 468 |
$root = (int)array_shift($items); |
| 469 |
|
| 470 |
if ($root) { |
| 471 |
$result[$root] = $root; |
| 472 |
foreach ($items as $item) { |
| 473 |
[$lv, $id] = explode(self::SEPARATOR_LEVEL, $item); |
| 474 |
$result[$id] = $root; |
| 475 |
} |
| 476 |
} |
| 477 |
} |
| 478 |
|
| 479 |
// get only unique roots |
| 480 |
$result = array_filter($result); // make sure there are no nulls |
| 481 |
$result = array_unique($result); |
| 482 |
|
| 483 |
// Re-sort raw data |
| 484 |
$result = array_fill_keys($result, null); |
| 485 |
$start = 0; |
| 486 |
|
| 487 |
while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) |
| 488 |
|| ($start < $datalen && ($pos = $datalen)) |
| 489 |
) { |
| 490 |
$len = $pos - $start; |
| 491 |
$elem = substr($this->raw_data, $start, $len); |
| 492 |
$start = $pos + 1; |
| 493 |
|
| 494 |
$npos = strpos($elem, self::SEPARATOR_ITEM); |
| 495 |
$root = (int)($npos ? substr($elem, 0, $npos) : $elem); |
| 496 |
|
| 497 |
$result[$root] = $elem; |
| 498 |
} |
| 499 |
|
| 500 |
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $result); |
| 501 |
} |
| 502 |
|
| 503 |
/** |
| 504 |
* Returns data as tree |
| 505 |
* |
| 506 |
* @return array Data tree |
| 507 |
*/ |
| 508 |
public function get_tree() |
| 509 |
{ |
| 510 |
$datalen = strlen($this->raw_data); |
| 511 |
$result = []; |
| 512 |
$start = 0; |
| 513 |
|
| 514 |
while (($pos = @strpos($this->raw_data, self::SEPARATOR_ELEMENT, $start)) |
| 515 |
|| ($start < $datalen && ($pos = $datalen)) |
| 516 |
) { |
| 517 |
$len = $pos - $start; |
| 518 |
$elem = substr($this->raw_data, $start, $len); |
| 519 |
$items = explode(self::SEPARATOR_ITEM, $elem); |
| 520 |
$result[array_shift($items)] = $this->build_thread($items); |
| 521 |
$start = $pos + 1; |
| 522 |
} |
| 523 |
|
| 524 |
return $result; |
| 525 |
} |
| 526 |
|
| 527 |
/** |
| 528 |
* Returns thread depth and children data |
| 529 |
* |
| 530 |
* @return array Thread data |
| 531 |
*/ |
| 532 |
public function get_thread_data() |
| 533 |
{ |
| 534 |
$data = $this->get_tree(); |
| 535 |
$depth = []; |
| 536 |
$children = []; |
| 537 |
|
| 538 |
$this->build_thread_data($data, $depth, $children); |
| 539 |
|
| 540 |
return [$depth, $children]; |
| 541 |
} |
| 542 |
|
| 543 |
/** |
| 544 |
* Creates 'depth' and 'children' arrays from stored thread 'tree' data. |
| 545 |
*/ |
| 546 |
protected function build_thread_data($data, &$depth, &$children, $level = 0) |
| 547 |
{ |
| 548 |
foreach ((array)$data as $key => $val) { |
| 549 |
$empty = empty($val) || !is_array($val); |
| 550 |
$children[$key] = !$empty; |
| 551 |
$depth[$key] = $level; |
| 552 |
if (!$empty) { |
| 553 |
$this->build_thread_data($val, $depth, $children, $level + 1); |
| 554 |
} |
| 555 |
} |
| 556 |
} |
| 557 |
|
| 558 |
/** |
| 559 |
* Converts part of the raw thread into an array |
| 560 |
*/ |
| 561 |
protected function build_thread($items, $level = 1, &$pos = 0) |
| 562 |
{ |
| 563 |
$result = []; |
| 564 |
|
| 565 |
for ($len = count($items) ; $pos < $len ; $pos++) { |
| 566 |
[$lv, $id] = explode(self::SEPARATOR_LEVEL, $items[$pos]); |
| 567 |
if ($level == $lv) { |
| 568 |
$pos++; |
| 569 |
$result[$id] = $this->build_thread($items, $level + 1, $pos); |
| 570 |
} else { |
| 571 |
$pos--; |
| 572 |
break; |
| 573 |
} |
| 574 |
} |
| 575 |
|
| 576 |
return $result; |
| 577 |
} |
| 578 |
|
| 579 |
/** |
| 580 |
* IMAP THREAD response parser |
| 581 |
*/ |
| 582 |
protected function parse_thread($str, $begin = 0, $end = 0, $depth = 0) |
| 583 |
{ |
| 584 |
// Don't be tempted to change $str to pass by reference to speed this up - it will slow it down by about |
| 585 |
// 7 times instead :-) See comments on http://uk2.php.net/references and this article: |
| 586 |
// http://derickrethans.nl/files/phparch-php-variables-article.pdf |
| 587 |
$node = ''; |
| 588 |
if (!$end) { |
| 589 |
$end = strlen($str); |
| 590 |
} |
| 591 |
|
| 592 |
// Let's try to store data in max. compacted stracture as a string, |
| 593 |
// arrays handling is much more expensive |
| 594 |
// For the following structure: THREAD (2)(3 6 (4 23)(44 7 96)) |
| 595 |
// -- 2 |
| 596 |
// -- 3 |
| 597 |
// \-- 6 |
| 598 |
// |-- 4 |
| 599 |
// | \-- 23 |
| 600 |
// | |
| 601 |
// \-- 44 |
| 602 |
// \-- 7 |
| 603 |
// \-- 96 |
| 604 |
// |
| 605 |
// The output will be: 2,3^1:6^2:4^3:23^2:44^3:7^4:96 |
| 606 |
|
| 607 |
if ($str[$begin] != '(') { |
| 608 |
// find next bracket |
| 609 |
$stop = $begin + strcspn($str, '()', $begin, $end - $begin); |
| 610 |
$messages = explode(' ', trim(substr($str, $begin, $stop - $begin))); |
| 611 |
|
| 612 |
if (empty($messages)) { |
| 613 |
return $node; |
| 614 |
} |
| 615 |
|
| 616 |
foreach ($messages as $msg) { |
| 617 |
if ($msg) { |
| 618 |
$node .= ($depth ? self::SEPARATOR_ITEM.$depth.self::SEPARATOR_LEVEL : '').$msg; |
| 619 |
$this->meta['messages']++; |
| 620 |
$depth++; |
| 621 |
} |
| 622 |
} |
| 623 |
|
| 624 |
if ($stop < $end) { |
| 625 |
$node .= $this->parse_thread($str, $stop, $end, $depth); |
| 626 |
} |
| 627 |
} else { |
| 628 |
$off = $begin; |
| 629 |
while ($off < $end) { |
| 630 |
$start = $off; |
| 631 |
$off++; |
| 632 |
$n = 1; |
| 633 |
while ($n > 0) { |
| 634 |
$p = strpos($str, ')', $off); |
| 635 |
if ($p === false) { |
| 636 |
// error, wrong structure, mismatched brackets in IMAP THREAD response |
| 637 |
// @TODO: write error to the log or maybe set $this->raw_data = null; |
| 638 |
return $node; |
| 639 |
} |
| 640 |
$p1 = strpos($str, '(', $off); |
| 641 |
if ($p1 !== false && $p1 < $p) { |
| 642 |
$off = $p1 + 1; |
| 643 |
$n++; |
| 644 |
} else { |
| 645 |
$off = $p + 1; |
| 646 |
$n--; |
| 647 |
} |
| 648 |
} |
| 649 |
|
| 650 |
$thread = $this->parse_thread($str, $start + 1, $off - 1, $depth); |
| 651 |
if ($thread) { |
| 652 |
if (!$depth) { |
| 653 |
if ($node) { |
| 654 |
$node .= self::SEPARATOR_ELEMENT; |
| 655 |
} |
| 656 |
} |
| 657 |
$node .= $thread; |
| 658 |
} |
| 659 |
} |
| 660 |
} |
| 661 |
|
| 662 |
return $node; |
| 663 |
} |
| 664 |
} |
| 665 |
|
