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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * The query helpers for the FAQ 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 | * @copyright 2024-2026 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 2024-03-17 |
| 16 | */ |
| 17 | |
| 18 | declare(strict_types=1); |
| 19 | |
| 20 | namespace phpMyFAQ\Faq; |
| 21 | |
| 22 | use phpMyFAQ\Category; |
| 23 | use phpMyFAQ\Configuration; |
| 24 | use phpMyFAQ\Database; |
| 25 | use phpMyFAQ\Utils; |
| 26 | |
| 27 | readonly class QueryHelper |
| 28 | { |
| 29 | public const string FAQ_SQL_ACTIVE_YES = 'yes'; |
| 30 | |
| 31 | public const string FAQ_SQL_ACTIVE_NO = 'no'; |
| 32 | |
| 33 | public const string FAQ_QUERY_TYPE_APPROVAL = 'faq_approval'; |
| 34 | |
| 35 | public const string FAQ_QUERY_TYPE_EXPORT_PDF = 'faq_export_pdf'; |
| 36 | |
| 37 | public const string FAQ_QUERY_TYPE_EXPORT_JSON = 'faq_export_json'; |
| 38 | |
| 39 | private Configuration $configuration; |
| 40 | |
| 41 | /** |
| 42 | * @param int[] $groups |
| 43 | */ |
| 44 | public function __construct( |
| 45 | private int $user, |
| 46 | private array $groups, |
| 47 | ) { |
| 48 | $this->configuration = Configuration::getConfigurationInstance(); |
| 49 | } |
| 50 | |
| 51 | public function queryPermission(bool $hasGroupSupport = false): string |
| 52 | { |
| 53 | $groupList = $this->normalizeIdList($this->groups); |
| 54 | if ($hasGroupSupport) { |
| 55 | if (-1 === $this->user) { |
| 56 | return sprintf('AND fdg.group_id IN (%s)', $groupList); |
| 57 | } |
| 58 | |
| 59 | return sprintf('AND ( fdu.user_id = %d OR fdg.group_id IN (%s) )', $this->user, $groupList); |
| 60 | } |
| 61 | |
| 62 | if (-1 !== $this->user) { |
| 63 | return sprintf('AND ( fdu.user_id = %d OR fdu.user_id = -1 )', $this->user); |
| 64 | } |
| 65 | |
| 66 | return 'AND fdu.user_id = -1'; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Permission filter as EXISTS subqueries requiring BOTH a user grant and a group |
| 71 | * grant (the effective statistics semantics). Unlike queryPermission(), this does |
| 72 | * not depend on LEFT JOINs against faqdata_user/faqdata_group in the outer query, |
| 73 | * so it never fans one FAQ out into multiple result rows — a prerequisite for SQL LIMIT. |
| 74 | */ |
| 75 | public function queryPermissionExistsAll(bool $hasGroupSupport = false): string |
| 76 | { |
| 77 | $clause = 'AND ' . $this->userGrantExists(); |
| 78 | |
| 79 | if ($hasGroupSupport) { |
| 80 | $clause .= ' AND ' . $this->groupGrantExists(); |
| 81 | } |
| 82 | |
| 83 | return $clause; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Permission filter as EXISTS subqueries with the same semantics as queryPermission() |
| 88 | * (a user grant OR a group grant suffices), but without the LEFT JOIN fanout, so |
| 89 | * result rows stay one-per-FAQ and SQL LIMIT/COUNT are reliable. |
| 90 | */ |
| 91 | public function queryPermissionExistsAny(bool $hasGroupSupport = false): string |
| 92 | { |
| 93 | if (!$hasGroupSupport) { |
| 94 | return 'AND ' . $this->userGrantExists(); |
| 95 | } |
| 96 | |
| 97 | if (-1 === $this->user) { |
| 98 | return 'AND ' . $this->groupGrantExists(); |
| 99 | } |
| 100 | |
| 101 | return sprintf( |
| 102 | 'AND (EXISTS (SELECT 1 FROM %sfaqdata_user pfdu ' |
| 103 | . 'WHERE pfdu.record_id = fd.id AND pfdu.user_id = %d) OR %s)', |
| 104 | Database::getTablePrefix(), |
| 105 | $this->user, |
| 106 | $this->groupGrantExists(), |
| 107 | ); |
| 108 | } |
| 109 | |
| 110 | private function userGrantExists(): string |
| 111 | { |
| 112 | $userIds = -1 === $this->user ? '-1' : sprintf('-1, %d', $this->user); |
| 113 | |
| 114 | return sprintf( |
| 115 | 'EXISTS (SELECT 1 FROM %sfaqdata_user pfdu WHERE pfdu.record_id = fd.id AND pfdu.user_id IN (%s))', |
| 116 | Database::getTablePrefix(), |
| 117 | $userIds, |
| 118 | ); |
| 119 | } |
| 120 | |
| 121 | private function groupGrantExists(): string |
| 122 | { |
| 123 | return sprintf( |
| 124 | 'EXISTS (SELECT 1 FROM %sfaqdata_group pfdg WHERE pfdg.record_id = fd.id AND pfdg.group_id IN (%s))', |
| 125 | Database::getTablePrefix(), |
| 126 | $this->normalizeIdList($this->groups), |
| 127 | ); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Build the SQL query for retrieving FAQ records according to the constraints provided. |
| 132 | */ |
| 133 | public function getQuery( |
| 134 | string $queryType, |
| 135 | int $categoryId, |
| 136 | bool $bDownwards, |
| 137 | string $lang, |
| 138 | string $date, |
| 139 | int $faqId = 0, |
| 140 | ): string { |
| 141 | $query = sprintf( |
| 142 | ' |
| 143 | SELECT |
| 144 | fd.id AS id, |
| 145 | fd.solution_id AS solution_id, |
| 146 | fd.revision_id AS revision_id, |
| 147 | fd.lang AS lang, |
| 148 | fcr.category_id AS category_id, |
| 149 | fd.active AS active, |
| 150 | fd.sticky AS sticky, |
| 151 | fd.keywords AS keywords, |
| 152 | fd.thema AS thema, |
| 153 | fd.content AS content, |
| 154 | fd.author AS author, |
| 155 | fd.email AS email, |
| 156 | fd.comment AS comment, |
| 157 | fd.updated AS updated, |
| 158 | fd.notes AS notes, |
| 159 | fv.visits AS visits, |
| 160 | fv.last_visit AS last_visit |
| 161 | FROM |
| 162 | %sfaqdata fd, |
| 163 | %sfaqvisits fv, |
| 164 | %sfaqcategoryrelations fcr |
| 165 | WHERE |
| 166 | fd.id = fcr.record_id |
| 167 | AND |
| 168 | fd.lang = fcr.record_lang |
| 169 | AND ', |
| 170 | Database::getTablePrefix(), |
| 171 | Database::getTablePrefix(), |
| 172 | Database::getTablePrefix(), |
| 173 | ); |
| 174 | // faqvisits data selection |
| 175 | if ($faqId !== 0) { |
| 176 | // Select ONLY the faq with the provided $faqid |
| 177 | $query .= "fd.id = '" . $faqId . "' AND "; |
| 178 | } |
| 179 | |
| 180 | $query .= 'fd.id = fv.id |
| 181 | AND |
| 182 | fd.lang = fv.lang'; |
| 183 | |
| 184 | if ($categoryId > 0) { |
| 185 | $query .= ' AND'; |
| 186 | $query .= ' (fcr.category_id = ' . $categoryId; |
| 187 | if ($bDownwards) { |
| 188 | $query .= $this->getCategoryIdWhereSequence($categoryId); |
| 189 | } |
| 190 | |
| 191 | $query .= ')'; |
| 192 | } |
| 193 | |
| 194 | if ($date !== '' && $date !== '0' && Utils::isLikeOnPMFDate($date)) { |
| 195 | $query .= ' AND'; |
| 196 | $query .= " fd.updated LIKE '" . $date . "'"; |
| 197 | } |
| 198 | |
| 199 | if ($lang !== '' && $lang !== '0' && Utils::isLanguage($lang)) { |
| 200 | $query .= ' AND'; |
| 201 | $query .= " fd.lang = '" . $this->configuration->getDb()->escape($lang) . "'"; |
| 202 | } |
| 203 | |
| 204 | switch ($queryType) { |
| 205 | case self::FAQ_QUERY_TYPE_APPROVAL: |
| 206 | $query .= ' AND'; |
| 207 | $query .= " fd.active = '" . self::FAQ_SQL_ACTIVE_NO . "'"; |
| 208 | break; |
| 209 | case self::FAQ_QUERY_TYPE_EXPORT_PDF: |
| 210 | case self::FAQ_QUERY_TYPE_EXPORT_JSON: |
| 211 | default: |
| 212 | $query .= ' AND'; |
| 213 | $query .= " fd.active = '" . self::FAQ_SQL_ACTIVE_YES . "'"; |
| 214 | break; |
| 215 | } |
| 216 | |
| 217 | match ($queryType) { |
| 218 | self::FAQ_QUERY_TYPE_EXPORT_PDF, |
| 219 | self::FAQ_QUERY_TYPE_EXPORT_JSON, |
| 220 | => $query .= "\nORDER BY fcr.category_id, fd.id", |
| 221 | default => $query .= "\nORDER BY fcr.category_id, fd.id", |
| 222 | }; |
| 223 | |
| 224 | return $query; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Build a logic sequence, for a WHERE statement, of those category IDs |
| 229 | * children of the provided category ID, if any. |
| 230 | */ |
| 231 | private function getCategoryIdWhereSequence(int $categoryId, ?Category $category = null): string |
| 232 | { |
| 233 | $sqlWhereFilter = ''; |
| 234 | |
| 235 | if ($category === null) { |
| 236 | $category = new Category($this->configuration); |
| 237 | } |
| 238 | |
| 239 | $aChildren = array_values($category->getChildren($categoryId)); |
| 240 | |
| 241 | foreach ($aChildren as $aChild) { |
| 242 | $childCategoryId = (int) $aChild; |
| 243 | $sqlWhereFilter .= ' OR fcr.category_id = ' . $childCategoryId; |
| 244 | $sqlWhereFilter .= $this->getCategoryIdWhereSequence($childCategoryId, $category); |
| 245 | } |
| 246 | |
| 247 | return $sqlWhereFilter; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * @param array<int|string> $ids |
| 252 | */ |
| 253 | private function normalizeIdList(array $ids): string |
| 254 | { |
| 255 | $normalizedIds = array_map(static fn($id): int => (int) $id, $ids); |
| 256 | |
| 257 | return $normalizedIds === [] ? '-1' : implode(', ', $normalizedIds); |
| 258 | } |
| 259 | } |