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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * The main Tags class. |
| 5 | * |
| 6 | * This Source Code Form is subject to the terms of the Mozilla Public License, |
| 7 | * v. 2.0. If a copy of the MPL was not distributed with this file, You can |
| 8 | * obtain one at https://mozilla.org/MPL/2.0/. |
| 9 | * |
| 10 | * @package phpMyFAQ |
| 11 | * @author Thorsten Rinne <thorsten@phpmyfaq.de> |
| 12 | * @author Matteo Scaramuccia <matteo@scaramuccia.com> |
| 13 | * @author Georgi Korchev <korchev@yahoo.com> |
| 14 | * @copyright 2006-2026 phpMyFAQ Team |
| 15 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 16 | * @link https://www.phpmyfaq.de |
| 17 | * @since 2006-08-10 |
| 18 | */ |
| 19 | |
| 20 | declare(strict_types=1); |
| 21 | |
| 22 | namespace phpMyFAQ; |
| 23 | |
| 24 | use phpMyFAQ\Entity\Tag; |
| 25 | |
| 26 | /** |
| 27 | * Class Tags |
| 28 | * |
| 29 | * Manages FAQ tags with support for permission-based filtering. |
| 30 | * Tags are filtered based on user and group permissions to ensure |
| 31 | * that only tags from FAQs the current user can access are displayed. |
| 32 | * |
| 33 | * @package phpMyFAQ |
| 34 | */ |
| 35 | class Tags |
| 36 | { |
| 37 | private int $user = -1; |
| 38 | |
| 39 | /** @var array<int> */ |
| 40 | private array $groups = [-1]; |
| 41 | |
| 42 | private bool $bypassPermissionCheck = false; |
| 43 | |
| 44 | /** |
| 45 | * Constructor. |
| 46 | */ |
| 47 | public function __construct( |
| 48 | private readonly Configuration $configuration, |
| 49 | ) { |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Sets the user. |
| 54 | */ |
| 55 | public function setUser(int $userId = -1): Tags |
| 56 | { |
| 57 | $this->user = $userId; |
| 58 | return $this; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Sets the groups. |
| 63 | * |
| 64 | * @param array<int> $groups Array of group IDs |
| 65 | */ |
| 66 | public function setGroups(array $groups): Tags |
| 67 | { |
| 68 | // Ensure all values are integers for security |
| 69 | $this->groups = array_map(intval(...), $groups); |
| 70 | return $this; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Disables permission filtering. Use in admin contexts where the |
| 75 | * caller has already enforced authorization and must see all tags. |
| 76 | */ |
| 77 | public function setBypassPermissionCheck(bool $bypass = true): Tags |
| 78 | { |
| 79 | $this->bypassPermissionCheck = $bypass; |
| 80 | return $this; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Returns all tags for a FAQ record. |
| 85 | * |
| 86 | * @param int $recordId Record ID |
| 87 | */ |
| 88 | public function getAllLinkTagsById(int $recordId): string |
| 89 | { |
| 90 | $tagListing = ''; |
| 91 | |
| 92 | foreach ($this->getAllTagsById($recordId) as $taggingId => $taggingName) { |
| 93 | $title = Strings::htmlentities($taggingName); |
| 94 | $url = sprintf('%ssearch.html?tagging_id=%d', $this->configuration->getDefaultUrl(), $taggingId); |
| 95 | $oLink = new Link($url, $this->configuration); |
| 96 | $oLink->setTitle($title); |
| 97 | $oLink->text = $title; |
| 98 | $oLink->tooltip = $title; |
| 99 | $oLink->class = 'btn btn-outline-primary'; |
| 100 | $tagListing .= $oLink->toHtmlAnchor() . ' '; |
| 101 | } |
| 102 | |
| 103 | return '' === $tagListing ? '-' : Strings::substr($tagListing, 0, -1); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Returns all tags for a FAQ record. |
| 108 | * |
| 109 | * @param int $recordId Record ID |
| 110 | * @return array<int, string> |
| 111 | */ |
| 112 | public function getAllTagsById(int $recordId): array |
| 113 | { |
| 114 | $tags = []; |
| 115 | |
| 116 | $query = sprintf( |
| 117 | ' |
| 118 | SELECT |
| 119 | dt.tagging_id AS tagging_id, |
| 120 | t.tagging_name AS tagging_name |
| 121 | FROM |
| 122 | %sfaqdata_tags dt, %sfaqtags t |
| 123 | WHERE |
| 124 | dt.record_id = %d |
| 125 | AND |
| 126 | dt.tagging_id = t.tagging_id |
| 127 | ORDER BY |
| 128 | t.tagging_name', |
| 129 | Database::getTablePrefix(), |
| 130 | Database::getTablePrefix(), |
| 131 | $recordId, |
| 132 | ); |
| 133 | |
| 134 | $result = $this->configuration->getDb()->query($query); |
| 135 | if ($result) { |
| 136 | while (true) { |
| 137 | $row = $this->configuration->getDb()->fetchObject($result); |
| 138 | if (!$row instanceof \stdClass) { |
| 139 | break; |
| 140 | } |
| 141 | |
| 142 | $tags[(int) $row->tagging_id] = (string) $row->tagging_name; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | return $tags; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Saves all tags from a FAQ record. |
| 151 | * |
| 152 | * @param int $recordId Record ID |
| 153 | * @param array<int, string> $tags Array of tags |
| 154 | */ |
| 155 | public function create(int $recordId, array $tags): bool |
| 156 | { |
| 157 | $currentTags = $this->getAllTags(); |
| 158 | $registeredTags = []; |
| 159 | |
| 160 | // Delete all tag references for the faq record |
| 161 | if ($tags !== []) { |
| 162 | $this->deleteByRecordId($recordId); |
| 163 | } |
| 164 | |
| 165 | // Store tags and references for the faq record |
| 166 | foreach ($tags as $tag) { |
| 167 | $tag = trim($tag); |
| 168 | if (Strings::strlen($tag) > 0 && !in_array($tag, $registeredTags, strict: true)) { |
| 169 | $query = ''; |
| 170 | $existingTagId = array_search( |
| 171 | Strings::strtolower($tag), |
| 172 | array_map(['phpMyFAQ\Strings', 'strtolower'], $currentTags), |
| 173 | strict: true, |
| 174 | ); |
| 175 | |
| 176 | if ($existingTagId === false) { |
| 177 | // Create the new tag |
| 178 | $newTagId = $this->configuration->getDb()->nextId( |
| 179 | Database::getTablePrefix() . 'faqtags', |
| 180 | 'tagging_id', |
| 181 | ); |
| 182 | $query = sprintf( |
| 183 | "INSERT INTO %sfaqtags (tagging_id, tagging_name) VALUES (%d, '%s')", |
| 184 | Database::getTablePrefix(), |
| 185 | $newTagId, |
| 186 | $this->configuration->getDb()->escape($tag), |
| 187 | ); |
| 188 | $this->configuration->getDb()->query($query); |
| 189 | |
| 190 | // Add the tag reference for the faq record |
| 191 | $query = sprintf( |
| 192 | 'INSERT INTO %sfaqdata_tags (record_id, tagging_id) VALUES (%d, %d)', |
| 193 | Database::getTablePrefix(), |
| 194 | $recordId, |
| 195 | $newTagId, |
| 196 | ); |
| 197 | } |
| 198 | |
| 199 | if ($existingTagId !== false) { |
| 200 | // Add the tag reference for the faq record |
| 201 | $query = sprintf( |
| 202 | 'INSERT INTO %sfaqdata_tags (record_id, tagging_id) VALUES (%d, %d)', |
| 203 | Database::getTablePrefix(), |
| 204 | $recordId, |
| 205 | $existingTagId, |
| 206 | ); |
| 207 | } |
| 208 | |
| 209 | if ($query !== '') { |
| 210 | $this->configuration->getDb()->query($query); |
| 211 | } |
| 212 | |
| 213 | $registeredTags[] = $tag; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | return true; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Returns all tags. |
| 222 | * |
| 223 | * @param string|null $search Move the returned result set to be the result of a start-with search |
| 224 | * @param int $limit Limit the returned result set |
| 225 | * @param bool $showInactive Show inactive tags |
| 226 | * @return array<int, string> |
| 227 | */ |
| 228 | public function getAllTags( |
| 229 | ?string $search = null, |
| 230 | int $limit = PMF_TAGS_CLOUD_RESULT_SET_SIZE, |
| 231 | bool $showInactive = false, |
| 232 | ): array { |
| 233 | $allTags = []; |
| 234 | |
| 235 | $like = match (Database::getType()) { |
| 236 | 'pgsql' => 'ILIKE', |
| 237 | default => 'LIKE', |
| 238 | }; |
| 239 | |
| 240 | // Build permission check for user and groups |
| 241 | $permissionCheck = $this->buildPermissionCheck(); |
| 242 | |
| 243 | $query = sprintf( |
| 244 | ' |
| 245 | SELECT |
| 246 | MIN(t.tagging_id) AS tagging_id, t.tagging_name AS tagging_name |
| 247 | FROM |
| 248 | %sfaqtags t |
| 249 | LEFT JOIN |
| 250 | %sfaqdata_tags dt |
| 251 | ON |
| 252 | dt.tagging_id = t.tagging_id |
| 253 | LEFT JOIN |
| 254 | %sfaqdata d |
| 255 | ON |
| 256 | d.id = dt.record_id |
| 257 | LEFT JOIN |
| 258 | %sfaqdata_user fdu |
| 259 | ON |
| 260 | d.id = fdu.record_id |
| 261 | LEFT JOIN |
| 262 | %sfaqdata_group fdg |
| 263 | ON |
| 264 | d.id = fdg.record_id |
| 265 | WHERE |
| 266 | 1=1 |
| 267 | %s |
| 268 | %s |
| 269 | %s |
| 270 | GROUP BY |
| 271 | tagging_name |
| 272 | ORDER BY |
| 273 | tagging_name ASC', |
| 274 | Database::getTablePrefix(), |
| 275 | Database::getTablePrefix(), |
| 276 | Database::getTablePrefix(), |
| 277 | Database::getTablePrefix(), |
| 278 | Database::getTablePrefix(), |
| 279 | $showInactive ? '' : "AND d.active = 'yes'", |
| 280 | $search !== null && $search !== '' |
| 281 | ? 'AND tagging_name ' . $like . " '" . $this->configuration->getDb()->escape($search) . "%'" |
| 282 | : '', |
| 283 | $permissionCheck, |
| 284 | ); |
| 285 | |
| 286 | $result = $this->configuration->getDb()->query($query); |
| 287 | |
| 288 | if ($result) { |
| 289 | $i = 0; |
| 290 | while (true) { |
| 291 | $row = $this->configuration->getDb()->fetchObject($result); |
| 292 | if (!$row instanceof \stdClass) { |
| 293 | break; |
| 294 | } |
| 295 | |
| 296 | if ($i >= $limit) { |
| 297 | break; |
| 298 | } |
| 299 | |
| 300 | $allTags[(int) $row->tagging_id] = (string) $row->tagging_name; |
| 301 | ++$i; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | return array_unique($allTags); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Deletes all tags from a given record id. |
| 310 | * |
| 311 | * @param int $recordId Record ID |
| 312 | */ |
| 313 | public function deleteByRecordId(int $recordId): bool |
| 314 | { |
| 315 | $query = sprintf('DELETE FROM %sfaqdata_tags WHERE record_id = %d', Database::getTablePrefix(), $recordId); |
| 316 | |
| 317 | return (bool) $this->configuration->getDb()->query($query); |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Updates a tag. |
| 322 | */ |
| 323 | public function update(Tag $tag): bool |
| 324 | { |
| 325 | $query = sprintf( |
| 326 | "UPDATE %sfaqtags SET tagging_name = '%s' WHERE tagging_id = %d", |
| 327 | Database::getTablePrefix(), |
| 328 | $this->configuration->getDb()->escape($tag->getName()), |
| 329 | $tag->getId(), |
| 330 | ); |
| 331 | |
| 332 | return (bool) $this->configuration->getDb()->query($query); |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Deletes a given tag. |
| 337 | */ |
| 338 | public function delete(int $tagId): bool |
| 339 | { |
| 340 | $query = sprintf('DELETE FROM %sfaqtags WHERE tagging_id = %d', Database::getTablePrefix(), $tagId); |
| 341 | |
| 342 | $this->configuration->getDb()->query($query); |
| 343 | |
| 344 | $query = sprintf('DELETE FROM %sfaqdata_tags WHERE tagging_id = %d', Database::getTablePrefix(), $tagId); |
| 345 | |
| 346 | return (bool) $this->configuration->getDb()->query($query); |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * Returns the FAQ record IDs where all tags are included. |
| 351 | * |
| 352 | * @param array<int, string> $arrayOfTags Array of tag names |
| 353 | * @return array<int, int> |
| 354 | */ |
| 355 | public function getFaqsByIntersectionTags(array $arrayOfTags): array |
| 356 | { |
| 357 | $db = $this->configuration->getDb(); |
| 358 | $escapedTags = array_map(static fn($tag): string => $db->escape((string) $tag), $arrayOfTags); |
| 359 | |
| 360 | $query = sprintf( |
| 361 | " |
| 362 | SELECT |
| 363 | td.record_id AS record_id |
| 364 | FROM |
| 365 | %sfaqdata_tags td |
| 366 | JOIN |
| 367 | %sfaqtags t ON (td.tagging_id = t.tagging_id) |
| 368 | JOIN |
| 369 | %sfaqdata d ON (td.record_id = d.id) |
| 370 | WHERE |
| 371 | (t.tagging_name IN ('%s')) |
| 372 | AND |
| 373 | (d.lang = '%s') |
| 374 | GROUP BY |
| 375 | td.record_id |
| 376 | HAVING |
| 377 | COUNT(td.record_id) = %d", |
| 378 | Database::getTablePrefix(), |
| 379 | Database::getTablePrefix(), |
| 380 | Database::getTablePrefix(), |
| 381 | implode("', '", $escapedTags), |
| 382 | $db->escape($this->configuration->getLanguage()->getLanguage()), |
| 383 | count($arrayOfTags), |
| 384 | ); |
| 385 | |
| 386 | $records = []; |
| 387 | $result = $this->configuration->getDb()->query($query); |
| 388 | if ($result) { |
| 389 | while (true) { |
| 390 | $row = $this->configuration->getDb()->fetchObject($result); |
| 391 | if (!$row instanceof \stdClass) { |
| 392 | break; |
| 393 | } |
| 394 | |
| 395 | $records[] = (int) $row->record_id; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | return $records; |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * Returns all FAQ record IDs where all tags are included. |
| 404 | * |
| 405 | * @param int $tagId Tagging ID |
| 406 | * @return array<int> |
| 407 | */ |
| 408 | public function getFaqsByTagId(int $tagId): array |
| 409 | { |
| 410 | $query = sprintf(' |
| 411 | SELECT |
| 412 | d.record_id AS record_id |
| 413 | FROM |
| 414 | %sfaqdata_tags d, %sfaqtags t |
| 415 | WHERE |
| 416 | t.tagging_id = d.tagging_id |
| 417 | AND |
| 418 | t.tagging_id = %d |
| 419 | GROUP BY |
| 420 | record_id', Database::getTablePrefix(), Database::getTablePrefix(), $tagId); |
| 421 | |
| 422 | $records = []; |
| 423 | $result = $this->configuration->getDb()->query($query); |
| 424 | if ($result) { |
| 425 | while (true) { |
| 426 | $row = $this->configuration->getDb()->fetchObject($result); |
| 427 | if (!$row instanceof \stdClass) { |
| 428 | break; |
| 429 | } |
| 430 | |
| 431 | $records[] = (int) $row->record_id; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | return $records; |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * @param int $limit Specify the maximum number of records to return |
| 440 | * @return array<int, int> |
| 441 | */ |
| 442 | public function getPopularTags(int $limit = 0): array |
| 443 | { |
| 444 | $tags = []; |
| 445 | |
| 446 | // Build permission check for user and groups |
| 447 | $permissionCheck = $this->buildPermissionCheck(); |
| 448 | |
| 449 | $query = sprintf( |
| 450 | " |
| 451 | SELECT |
| 452 | COUNT(dt.record_id) as freq, dt.tagging_id |
| 453 | FROM |
| 454 | %sfaqdata_tags dt |
| 455 | JOIN |
| 456 | %sfaqdata d ON d.id = dt.record_id |
| 457 | LEFT JOIN |
| 458 | %sfaqdata_user fdu ON d.id = fdu.record_id |
| 459 | LEFT JOIN |
| 460 | %sfaqdata_group fdg ON d.id = fdg.record_id |
| 461 | WHERE |
| 462 | d.lang = '%s' |
| 463 | AND d.active = 'yes' |
| 464 | %s |
| 465 | GROUP BY dt.tagging_id |
| 466 | ORDER BY freq DESC", |
| 467 | Database::getTablePrefix(), |
| 468 | Database::getTablePrefix(), |
| 469 | Database::getTablePrefix(), |
| 470 | Database::getTablePrefix(), |
| 471 | $this->configuration->getLanguage()->getLanguage(), |
| 472 | $permissionCheck, |
| 473 | ); |
| 474 | |
| 475 | $result = $this->configuration->getDb()->query($query); |
| 476 | |
| 477 | if ($result) { |
| 478 | while (true) { |
| 479 | $row = $this->configuration->getDb()->fetchObject($result); |
| 480 | if (!$row instanceof \stdClass) { |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | $tags[(int) $row->tagging_id] = (int) $row->freq; |
| 485 | if (--$limit === 0) { |
| 486 | break; |
| 487 | } |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | return $tags; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Returns the tagged item. |
| 496 | * |
| 497 | * @param int $tagId Tagging ID |
| 498 | */ |
| 499 | public function getTagNameById(int $tagId): string |
| 500 | { |
| 501 | $query = sprintf( |
| 502 | 'SELECT tagging_name FROM %sfaqtags WHERE tagging_id = %d', |
| 503 | Database::getTablePrefix(), |
| 504 | $tagId, |
| 505 | ); |
| 506 | |
| 507 | $result = $this->configuration->getDb()->query($query); |
| 508 | $row = $result ? $this->configuration->getDb()->fetchObject($result) : false; |
| 509 | if ($row instanceof \stdClass) { |
| 510 | return (string) $row->tagging_name; |
| 511 | } |
| 512 | |
| 513 | return ''; |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * Returns the popular Tags as an array |
| 518 | * |
| 519 | * @return array<int, array<string, int|string>> |
| 520 | */ |
| 521 | public function getPopularTagsAsArray(int $limit = 0): array |
| 522 | { |
| 523 | $data = []; |
| 524 | foreach ($this->getPopularTags($limit) as $tagId => $tagFreq) { |
| 525 | $tagName = $this->getTagNameById($tagId); |
| 526 | $data[] = [ |
| 527 | 'tagId' => $tagId, |
| 528 | 'tagName' => $tagName, |
| 529 | 'tagFrequency' => $tagFreq, |
| 530 | ]; |
| 531 | } |
| 532 | |
| 533 | return $data; |
| 534 | } |
| 535 | |
| 536 | /** |
| 537 | * Builds the permission check SQL clause based on user and groups. |
| 538 | * This ensures that only tags from FAQs that the current user has permission to view are included. |
| 539 | * |
| 540 | * @return string SQL WHERE clause for permission filtering |
| 541 | */ |
| 542 | private function buildPermissionCheck(): string |
| 543 | { |
| 544 | if ($this->bypassPermissionCheck) { |
| 545 | return ''; |
| 546 | } |
| 547 | |
| 548 | $groupSupport = $this->configuration->get(item: 'security.permLevel') !== 'basic'; |
| 549 | $groupList = $this->normalizePermissionGroups(); |
| 550 | |
| 551 | if ($groupSupport) { |
| 552 | if (-1 === $this->user) { |
| 553 | // Only group permissions apply (anonymous user) |
| 554 | return sprintf('AND fdg.group_id IN (%s)', $groupList); |
| 555 | } |
| 556 | |
| 557 | // Check both user and group permissions |
| 558 | return sprintf('AND ( fdu.user_id = %d OR fdg.group_id IN (%s) )', (int) $this->user, $groupList); |
| 559 | } |
| 560 | |
| 561 | // Basic permission level - only user permissions |
| 562 | if (-1 !== $this->user) { |
| 563 | return sprintf('AND ( fdu.user_id = %d OR fdu.user_id = -1 )', (int) $this->user); |
| 564 | } |
| 565 | |
| 566 | // Anonymous user with basic permission level |
| 567 | return 'AND fdu.user_id = -1'; |
| 568 | } |
| 569 | |
| 570 | private function normalizePermissionGroups(): string |
| 571 | { |
| 572 | $normalizedGroups = array_map(static fn($group): int => (int) $group, $this->groups); |
| 573 | |
| 574 | return $normalizedGroups === [] ? '-1' : implode(', ', $normalizedGroups); |
| 575 | } |
| 576 | } |