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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Search Service |
| 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 | * @copyright 2026 phpMyFAQ Team |
| 13 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 14 | * @link https://www.phpmyfaq.de |
| 15 | * @since 2026-01-02 |
| 16 | */ |
| 17 | |
| 18 | declare(strict_types=1); |
| 19 | |
| 20 | namespace phpMyFAQ\Search; |
| 21 | |
| 22 | use Exception; |
| 23 | use League\CommonMark\Exception\CommonMarkException; |
| 24 | use phpMyFAQ\Category; |
| 25 | use phpMyFAQ\Configuration; |
| 26 | use phpMyFAQ\Faq; |
| 27 | use phpMyFAQ\Faq\Permission; |
| 28 | use phpMyFAQ\Helper\SearchHelper; |
| 29 | use phpMyFAQ\Helper\TagsHelper; |
| 30 | use phpMyFAQ\Language\Plurals; |
| 31 | use phpMyFAQ\Pagination; |
| 32 | use phpMyFAQ\Pagination\PaginationTemplates; |
| 33 | use phpMyFAQ\Pagination\UrlConfig; |
| 34 | use phpMyFAQ\Search; |
| 35 | use phpMyFAQ\Tags; |
| 36 | use phpMyFAQ\User\CurrentUser; |
| 37 | |
| 38 | /** |
| 39 | * Service class for search-related business logic. |
| 40 | */ |
| 41 | final class SearchService |
| 42 | { |
| 43 | private Faq $faq; |
| 44 | |
| 45 | private Category $category; |
| 46 | |
| 47 | private Tags $tags; |
| 48 | |
| 49 | private Search $faqSearch; |
| 50 | |
| 51 | private SearchResultSet $searchResultSet; |
| 52 | |
| 53 | /** |
| 54 | * @param int[] $currentGroups |
| 55 | */ |
| 56 | public function __construct( |
| 57 | private readonly Configuration $configuration, |
| 58 | private readonly CurrentUser $currentUser, |
| 59 | private readonly array $currentGroups, |
| 60 | ) { |
| 61 | $this->faq = new Faq($this->configuration); |
| 62 | $this->faq->setUser($this->currentUser->getUserId()); |
| 63 | $this->faq->setGroups($this->currentGroups); |
| 64 | |
| 65 | $this->category = new Category($this->configuration, $this->currentGroups); |
| 66 | |
| 67 | $this->tags = new Tags($this->configuration); |
| 68 | $this->tags->setUser($this->currentUser->getUserId())->setGroups($this->currentGroups); |
| 69 | |
| 70 | $this->faqSearch = new Search($this->configuration); |
| 71 | |
| 72 | $faqPermission = new Permission($this->configuration); |
| 73 | $this->searchResultSet = new SearchResultSet($this->currentUser, $faqPermission, $this->configuration); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Processes search input and returns search results with metadata. |
| 78 | * |
| 79 | * @throws CommonMarkException |
| 80 | * @return array<string, mixed> |
| 81 | */ |
| 82 | public function processSearch( |
| 83 | string $inputSearchTerm, |
| 84 | string $inputTag, |
| 85 | int|string $inputCategory, |
| 86 | bool $allLanguages, |
| 87 | int $page, |
| 88 | ): array { |
| 89 | $tagSearch = false; |
| 90 | $numOfResults = 0; |
| 91 | $searchResults = []; |
| 92 | $relTags = ''; |
| 93 | $tags = []; |
| 94 | $baseUrl = sprintf( |
| 95 | '%ssearch.html?search=%s&seite=%d%s&pmf-search-category=%d', |
| 96 | $this->configuration->getDefaultUrl(), |
| 97 | urlencode($inputSearchTerm), |
| 98 | $page, |
| 99 | $allLanguages ? '&langs=all' : '', |
| 100 | $inputCategory, |
| 101 | ); |
| 102 | |
| 103 | // Handle tag search |
| 104 | if ($inputTag !== '') { |
| 105 | $tagSearchData = $this->handleTagSearch($inputTag, $page, $allLanguages); |
| 106 | $tagSearch = true; |
| 107 | $numOfResults = (int) ($tagSearchData['numOfResults'] ?? 0); |
| 108 | $searchResults = $tagSearchData['searchResults']; |
| 109 | $relTags = (string) ($tagSearchData['relTags'] ?? ''); |
| 110 | $tagsData = $tagSearchData['tags'] ?? []; |
| 111 | $tags = []; |
| 112 | foreach (is_array($tagsData) ? $tagsData : [] as $tagId => $tagName) { |
| 113 | $tags[(int) $tagId] = (string) $tagName; |
| 114 | } |
| 115 | $baseUrl = (string) ($tagSearchData['baseUrl'] ?? ''); |
| 116 | } |
| 117 | |
| 118 | // Handle fulltext search |
| 119 | if ($inputSearchTerm !== '') { |
| 120 | $fulltextData = $this->handleFulltextSearch($inputSearchTerm, (int) $inputCategory, $allLanguages, $page); |
| 121 | $searchResults = $fulltextData['searchResults']; |
| 122 | $numOfResults = (int) ($fulltextData['numOfResults'] ?? 0); |
| 123 | $baseUrl = (string) ($fulltextData['baseUrl'] ?? ''); |
| 124 | } |
| 125 | |
| 126 | // Change category value |
| 127 | $inputCategory = '%' === $inputCategory ? 0 : $inputCategory; |
| 128 | |
| 129 | // Number of results |
| 130 | if ($numOfResults === 0) { |
| 131 | $numOfResults = $this->searchResultSet->getNumberOfResults(); |
| 132 | } |
| 133 | |
| 134 | // Build category tree |
| 135 | if ($allLanguages) { |
| 136 | $this->category->transform(0); |
| 137 | } |
| 138 | |
| 139 | $this->category->buildCategoryTree(); |
| 140 | |
| 141 | // Get most popular searches |
| 142 | $mostPopularSearchData = $this->faqSearch->getMostPopularSearches((int) $this->configuration->get( |
| 143 | 'search.numberSearchTerms', |
| 144 | )); |
| 145 | |
| 146 | // Setup pagination |
| 147 | $confPerPage = (int) $this->configuration->get('records.numberOfRecordsPerPage'); |
| 148 | $totalPages = (int) ceil($numOfResults / $confPerPage); |
| 149 | |
| 150 | $faqPagination = new Pagination( |
| 151 | baseUrl: $baseUrl, |
| 152 | total: $numOfResults, |
| 153 | perPage: $confPerPage, |
| 154 | templates: new PaginationTemplates( |
| 155 | layout: '<ul class="pagination justify-content-center">{LAYOUT_CONTENT}</ul>', |
| 156 | ), |
| 157 | urlConfig: new UrlConfig(pageParamName: 'seite'), |
| 158 | ); |
| 159 | |
| 160 | // Get formatted search results |
| 161 | $formattedSearchResults = []; |
| 162 | if ($numOfResults > 0 && $inputSearchTerm !== '') { |
| 163 | $formattedSearchResults = $this->getFormattedSearchResults($inputSearchTerm, $page); |
| 164 | } |
| 165 | |
| 166 | return [ |
| 167 | 'tagSearch' => $tagSearch, |
| 168 | 'selectedCategory' => $inputCategory, |
| 169 | 'categories' => $this->category->getCategoryTree(), |
| 170 | 'numberOfSearchResults' => $numOfResults, |
| 171 | 'totalPages' => $totalPages, |
| 172 | 'currentPage' => $page, |
| 173 | 'searchTerm' => $inputSearchTerm, |
| 174 | 'searchTags' => $tagSearch ? $this->renderTagList($tags) : '', |
| 175 | 'searchResults' => $formattedSearchResults !== [] ? $formattedSearchResults : $searchResults, |
| 176 | 'allLanguages' => $allLanguages, |
| 177 | 'mostPopularSearches' => $mostPopularSearchData, |
| 178 | 'relatedTags' => $relTags, |
| 179 | 'tagList' => $this->tags->getPopularTags(), |
| 180 | 'pagination' => $faqPagination->render(), |
| 181 | ]; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Handles tag-based search. |
| 186 | * |
| 187 | * @throws CommonMarkException |
| 188 | * @return array<string, mixed> |
| 189 | */ |
| 190 | private function handleTagSearch(string $inputTag, int $page, bool $allLanguages): array |
| 191 | { |
| 192 | $tags = []; |
| 193 | $tagIds = explode(',', $inputTag); |
| 194 | $relTags = ''; |
| 195 | $searchResults = []; |
| 196 | |
| 197 | $tagsHelper = new TagsHelper(); |
| 198 | $tagsHelper->setTaggingIds($tagIds); |
| 199 | |
| 200 | foreach ($tagIds as $tagId) { |
| 201 | if (array_key_exists($tagId, $tags)) { |
| 202 | continue; |
| 203 | } |
| 204 | if (!is_numeric($tagId)) { |
| 205 | continue; |
| 206 | } |
| 207 | |
| 208 | $tags[(int) $tagId] = $this->tags->getTagNameById((int) $tagId); |
| 209 | } |
| 210 | |
| 211 | $recordIds = $this->tags->getFaqsByIntersectionTags($tags); |
| 212 | |
| 213 | $numOfResults = 0; |
| 214 | if (count($recordIds) > 0) { |
| 215 | $relatedTags = $this->calculateRelatedTags($recordIds, $tags); |
| 216 | |
| 217 | uasort($relatedTags, static fn($a, $b): int => $b - $a); |
| 218 | $numTags = 0; |
| 219 | |
| 220 | foreach ($relatedTags as $tagId => $relevance) { |
| 221 | $relTags .= $tagsHelper->renderRelatedTag($tagId, $this->tags->getTagNameById($tagId), $relevance); |
| 222 | if ($numTags++ > 20) { |
| 223 | break; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | $numOfResults = count($recordIds); |
| 228 | |
| 229 | // Apply pagination to record IDs for tag search |
| 230 | $confPerPage = (int) $this->configuration->get('records.numberOfRecordsPerPage'); |
| 231 | $first = ($page - 1) * $confPerPage; |
| 232 | $paginatedRecordIds = array_slice($recordIds, $first, $confPerPage); |
| 233 | |
| 234 | $searchResults = $this->faq->getFaqsDataByIds($paginatedRecordIds, 'fd.id', 'ASC', false); |
| 235 | } |
| 236 | |
| 237 | // Set base URL scheme for tag search |
| 238 | $baseUrl = sprintf( |
| 239 | '%ssearch.html?tagging_id=%s&seite=%d%s', |
| 240 | $this->configuration->getDefaultUrl(), |
| 241 | $inputTag, |
| 242 | $page, |
| 243 | $allLanguages ? '&langs=all' : '', |
| 244 | ); |
| 245 | |
| 246 | return [ |
| 247 | 'tags' => $tags, |
| 248 | 'relTags' => $relTags, |
| 249 | 'searchResults' => $searchResults, |
| 250 | 'numOfResults' => $numOfResults, |
| 251 | 'baseUrl' => $baseUrl, |
| 252 | ]; |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * Calculates related tags for the given record IDs. |
| 257 | * |
| 258 | * @param array<int> $recordIds |
| 259 | * @param array<int, string> $tags |
| 260 | * @return array<int, int> |
| 261 | */ |
| 262 | private function calculateRelatedTags(array $recordIds, array $tags): array |
| 263 | { |
| 264 | $relatedTags = []; |
| 265 | |
| 266 | foreach ($recordIds as $recordId) { |
| 267 | $resultTags = $this->tags->getAllTagsById((int) $recordId); |
| 268 | foreach (array_keys($resultTags) as $resultTagId) { |
| 269 | if (array_key_exists($resultTagId, $tags)) { |
| 270 | continue; |
| 271 | } |
| 272 | |
| 273 | $relatedTags[$resultTagId] = ($relatedTags[$resultTagId] ?? 0) + 1; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | return $relatedTags; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Handles fulltext search. |
| 282 | * |
| 283 | * @return array<string, mixed> |
| 284 | */ |
| 285 | private function handleFulltextSearch( |
| 286 | string $inputSearchTerm, |
| 287 | int $inputCategory, |
| 288 | bool $allLanguages, |
| 289 | int $page, |
| 290 | ): array { |
| 291 | $searchResults = []; |
| 292 | |
| 293 | $inputSearchTerm = $this->configuration->getDb()->escape(strip_tags($inputSearchTerm)); |
| 294 | |
| 295 | $this->faqSearch->setCategory($this->category); |
| 296 | $this->faqSearch->setCategoryId($inputCategory); |
| 297 | |
| 298 | try { |
| 299 | $searchResults = $this->faqSearch->search($inputSearchTerm, $allLanguages); |
| 300 | } catch (Exception $exception) { |
| 301 | $this->configuration->getLogger()->debug($exception->getMessage()); |
| 302 | } |
| 303 | |
| 304 | foreach ($searchResults as $faqKey => $faqValue) { |
| 305 | // Database drivers differ in column typing: mysqli returns strings, |
| 306 | // SQLite returns ints. Cast so the strict int type hint on |
| 307 | // getFaqResult() does not break full-text search on MySQL/MariaDB. |
| 308 | $checkedFaq = $this->faq->getFaqResult((int) $faqValue->id, (string) $faqValue->lang); |
| 309 | if (0 === $this->configuration->getDb()->numRows($checkedFaq)) { |
| 310 | unset($searchResults[$faqKey]); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | $this->searchResultSet->reviewResultSet($searchResults); |
| 315 | |
| 316 | $inputSearchTerm = stripslashes($inputSearchTerm); |
| 317 | $numOfResults = $this->searchResultSet->getNumberOfResults(); |
| 318 | |
| 319 | try { |
| 320 | $this->faqSearch->logSearchTerm($inputSearchTerm); |
| 321 | } catch (Exception $exception) { |
| 322 | $this->configuration->getLogger()->debug($exception->getMessage()); |
| 323 | } |
| 324 | |
| 325 | // Set the base URL scheme for fulltext search |
| 326 | $baseUrl = sprintf( |
| 327 | '%ssearch.html?search=%s&seite=%d%s&pmf-search-category=%d', |
| 328 | $this->configuration->getDefaultUrl(), |
| 329 | urlencode($inputSearchTerm), |
| 330 | $page, |
| 331 | $allLanguages ? '&langs=all' : '', |
| 332 | $inputCategory, |
| 333 | ); |
| 334 | |
| 335 | return [ |
| 336 | 'searchResults' => $searchResults, |
| 337 | 'numOfResults' => $numOfResults, |
| 338 | 'baseUrl' => $baseUrl, |
| 339 | ]; |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Gets formatted search results using SearchHelper. |
| 344 | * |
| 345 | * @return \stdClass[] |
| 346 | */ |
| 347 | private function getFormattedSearchResults(string $searchTerm, int $page): array |
| 348 | { |
| 349 | $searchHelper = new SearchHelper($this->configuration); |
| 350 | $searchHelper->setSearchTerm($searchTerm); |
| 351 | $searchHelper->setCategory($this->category); |
| 352 | $searchHelper->setPlurals(new Plurals()); |
| 353 | |
| 354 | try { |
| 355 | return $searchHelper->getSearchResult($this->searchResultSet, $page); |
| 356 | } catch (Exception|CommonMarkException) { |
| 357 | return []; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * Renders the tag list for display. |
| 363 | * |
| 364 | * @param array<int, string> $tags |
| 365 | */ |
| 366 | private function renderTagList(array $tags): string |
| 367 | { |
| 368 | $tagsHelper = new TagsHelper(); |
| 369 | $tagsHelper->setTaggingIds(array_keys($tags)); |
| 370 | return $tagsHelper->renderTagList($tags); |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * Checks if search should redirect to solution ID. |
| 375 | */ |
| 376 | public function shouldRedirectToSolutionId(string $inputSearchTerm, int $numOfResults): bool |
| 377 | { |
| 378 | return ( |
| 379 | is_numeric($inputSearchTerm) |
| 380 | && PMF_SOLUTION_ID_START_VALUE <= $inputSearchTerm |
| 381 | && 0 < $numOfResults |
| 382 | && (bool) $this->configuration->get('search.searchForSolutionId') |
| 383 | ); |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * Gets the solution ID redirect URL. |
| 388 | */ |
| 389 | public function getSolutionIdRedirectUrl(string $inputSearchTerm): string |
| 390 | { |
| 391 | return $this->configuration->getDefaultUrl() . 'solution_id_' . $inputSearchTerm . '.html'; |
| 392 | } |
| 393 | } |