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| 1 | <?php |
| 2 | |
| 3 | declare( strict_types=1 ); |
| 4 | |
| 5 | namespace ContentTranslation\Store; |
| 6 | |
| 7 | use ContentTranslation\Entity\RecentSignificantEdit; |
| 8 | use ContentTranslation\LoadBalancer; |
| 9 | use Wikimedia\Rdbms\IDatabase; |
| 10 | use Wikimedia\Rdbms\SelectQueryBuilder; |
| 11 | |
| 12 | class RecentSignificantEditStore { |
| 13 | // Array of supported wiki families for the 'recent significant edit' entrypoint |
| 14 | // The order of the entries should never change in production, as the indexes of this array |
| 15 | // are used to populate the "cxse_wiki_family" field inside "cx_significant_edits" table. |
| 16 | private const SUPPORTED_WIKI_FAMILIES = [ |
| 17 | 'wikipedia', |
| 18 | ]; |
| 19 | private const TABLE_NAME = 'cx_significant_edits'; |
| 20 | private const DEFAULT_WIKI_FAMILY = 'wikipedia'; |
| 21 | |
| 22 | /** |
| 23 | * The index of the wiki family of the current wiki inside SUPPORTED_WIKI_FAMILIES array. |
| 24 | * Used to populate "cxse_wiki_family" field inside "cx_significant_edits" table. |
| 25 | * |
| 26 | * @var int|false |
| 27 | */ |
| 28 | private $currentWikiFamilyKey; |
| 29 | |
| 30 | /** @var LoadBalancer */ |
| 31 | private $lb; |
| 32 | |
| 33 | public function __construct( LoadBalancer $lb, ?string $currentWikiFamily ) { |
| 34 | $this->lb = $lb; |
| 35 | $currentWikiFamily ??= self::DEFAULT_WIKI_FAMILY; |
| 36 | $this->currentWikiFamilyKey = array_search( $currentWikiFamily, self::SUPPORTED_WIKI_FAMILIES ); |
| 37 | } |
| 38 | |
| 39 | public function isCurrentWikiFamilySupported(): bool { |
| 40 | return $this->currentWikiFamilyKey !== false; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Given a RecentSignificantEdit instance, this method |
| 45 | * stores its fields, as a row inside the table. |
| 46 | * To make sure that at most 10 edits per user will exist, |
| 47 | * this method keeps only the 10 newest edits and deletes the rest. |
| 48 | * |
| 49 | * @param RecentSignificantEdit $edit |
| 50 | * @return int |
| 51 | */ |
| 52 | public function insert( RecentSignificantEdit $edit ): int { |
| 53 | $values = $this->normalizeEdit( $edit ); |
| 54 | $primaryDb = $this->lb->getConnection( DB_PRIMARY ); |
| 55 | $values['cxse_timestamp'] = $primaryDb->timestamp(); |
| 56 | |
| 57 | $primaryDb->newInsertQueryBuilder() |
| 58 | ->insertInto( self::TABLE_NAME ) |
| 59 | ->row( $values ) |
| 60 | ->caller( __METHOD__ ) |
| 61 | ->execute(); |
| 62 | $newId = $primaryDb->insertId(); |
| 63 | $edit->setId( $newId ); |
| 64 | // Keep only the 10 newest edits and delete the rest |
| 65 | $this->deleteOldEditsByUser( $edit->getUserId() ); |
| 66 | return $newId; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Given a RecentSignificantEdit instance with a valid id, |
| 71 | * this method updates the corresponding row inside the database, |
| 72 | * with the current values of the model and an updated edit |
| 73 | * timestamp. |
| 74 | * |
| 75 | * @param RecentSignificantEdit $edit |
| 76 | */ |
| 77 | public function update( RecentSignificantEdit $edit ): void { |
| 78 | if ( $edit->getId() === null ) { |
| 79 | return; |
| 80 | } |
| 81 | $primaryDb = $this->lb->getConnection( DB_PRIMARY ); |
| 82 | |
| 83 | $values = $this->normalizeEdit( $edit ); |
| 84 | $values['cxse_timestamp'] = $primaryDb->timestamp(); |
| 85 | |
| 86 | $primaryDb->newUpdateQueryBuilder() |
| 87 | ->update( self::TABLE_NAME ) |
| 88 | ->set( $values ) |
| 89 | ->where( [ 'cxse_id' => $edit->getId() ] ) |
| 90 | ->caller( __METHOD__ ) |
| 91 | ->execute(); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Given a user id, this method deletes all the edits done by |
| 96 | * this user, that are older than the 10 first edits. This way |
| 97 | * we ensure that the "cx_significant_edits" table will not |
| 98 | * store more than 10 edits per user. If less than 10 edits exist, |
| 99 | * it returns without doing anything. |
| 100 | * |
| 101 | * @param int $userId |
| 102 | */ |
| 103 | private function deleteOldEditsByUser( int $userId ) { |
| 104 | $edits = $this->findEditsByUser( $userId ); |
| 105 | if ( count( $edits ) <= 10 ) { |
| 106 | return; |
| 107 | } |
| 108 | |
| 109 | $editIdsToDelete = array_map( static function ( RecentSignificantEdit $edit ) { |
| 110 | return $edit->getId(); |
| 111 | }, array_slice( $edits, 10 ) ); |
| 112 | |
| 113 | $primaryDb = $this->lb->getConnection( DB_PRIMARY ); |
| 114 | $primaryDb->newDeleteQueryBuilder() |
| 115 | ->deleteFrom( self::TABLE_NAME ) |
| 116 | ->where( [ 'cxse_id' => $editIdsToDelete ] ) |
| 117 | ->caller( __METHOD__ ) |
| 118 | ->execute(); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Returns an array of RecentSignificantEdit instances, containing all |
| 123 | * the recent significant edits done by the given user and the current |
| 124 | * wiki family, ordered by their edit timestamp, in ascending order (i.e. oldest first). |
| 125 | * |
| 126 | * @param int $userId |
| 127 | * @return RecentSignificantEdit[] |
| 128 | */ |
| 129 | public function findEditsByUser( int $userId ): array { |
| 130 | $replicaDb = $this->lb->getConnection( DB_REPLICA ); |
| 131 | $result = $replicaDb->newSelectQueryBuilder() |
| 132 | ->select( IDatabase::ALL_ROWS ) |
| 133 | ->from( self::TABLE_NAME ) |
| 134 | ->where( [ |
| 135 | 'cxse_global_user_id' => $userId, |
| 136 | 'cxse_wiki_family' => $this->currentWikiFamilyKey |
| 137 | ] ) |
| 138 | ->orderBy( 'cxse_timestamp' ) |
| 139 | ->caller( __METHOD__ ) |
| 140 | ->fetchResultSet(); |
| 141 | |
| 142 | $edits = []; |
| 143 | foreach ( $result as $row ) { |
| 144 | $edits[] = $this->createEditFromRow( $row ); |
| 145 | } |
| 146 | return $edits; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Given a user id, a page wikidata id and a language, this method |
| 151 | * searches for a recent significant edit, matching these arguments, |
| 152 | * an instance of RecentSignificantEdit class if exists. |
| 153 | * |
| 154 | * @param int $userId |
| 155 | * @param int $pageWikidataId |
| 156 | * @param string $language |
| 157 | * @return RecentSignificantEdit|null |
| 158 | */ |
| 159 | public function findExistingEdit( int $userId, int $pageWikidataId, string $language ): ?RecentSignificantEdit { |
| 160 | $replicaDb = $this->lb->getConnection( DB_REPLICA ); |
| 161 | $row = $replicaDb->newSelectQueryBuilder() |
| 162 | ->select( IDatabase::ALL_ROWS ) |
| 163 | ->from( self::TABLE_NAME ) |
| 164 | ->where( [ |
| 165 | 'cxse_global_user_id' => $userId, |
| 166 | 'cxse_page_wikidata_id' => $pageWikidataId, |
| 167 | 'cxse_language' => $language, |
| 168 | 'cxse_wiki_family' => $this->currentWikiFamilyKey |
| 169 | ] ) |
| 170 | ->caller( __METHOD__ ) |
| 171 | ->fetchRow(); |
| 172 | |
| 173 | if ( !$row ) { |
| 174 | return null; |
| 175 | } |
| 176 | |
| 177 | return $this->createEditFromRow( $row ); |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Given a user id, a page wikidata id and a language code, |
| 182 | * this static method returns an array containing at most |
| 183 | * 10 instances of this class. These objects represent |
| 184 | * edits stored inside the table that: |
| 185 | * 1. were done by the given user, |
| 186 | * 2. were done to an article with the given wikidata page id |
| 187 | * 3. were done in a language different that the given one |
| 188 | * |
| 189 | * @param int $userId |
| 190 | * @param int $wikidataId |
| 191 | * @param string $language |
| 192 | * @return RecentSignificantEdit[] |
| 193 | */ |
| 194 | public function findEditsForPotentialSuggestions( int $userId, int $wikidataId, string $language ): array { |
| 195 | $conditions = [ |
| 196 | 'cxse_global_user_id' => $userId, |
| 197 | 'cxse_page_wikidata_id' => $wikidataId, |
| 198 | "cxse_language != '$language'", |
| 199 | "cxse_wiki_family" => $this->currentWikiFamilyKey |
| 200 | ]; |
| 201 | |
| 202 | $replicaDb = $this->lb->getConnection( DB_REPLICA ); |
| 203 | $result = $replicaDb->newSelectQueryBuilder() |
| 204 | ->select( [ |
| 205 | 'cxse_id', |
| 206 | 'cxse_global_user_id', |
| 207 | 'cxse_page_wikidata_id', |
| 208 | 'cxse_language', |
| 209 | 'cxse_wiki_family', |
| 210 | 'cxse_page_title', |
| 211 | 'cxse_section_titles', |
| 212 | 'cxse_timestamp' |
| 213 | ] ) |
| 214 | ->from( self::TABLE_NAME ) |
| 215 | ->where( $conditions ) |
| 216 | ->orderBy( 'cxse_timestamp', SelectQueryBuilder::SORT_DESC ) |
| 217 | ->limit( 10 ) |
| 218 | ->caller( __METHOD__ ) |
| 219 | ->fetchResultSet(); |
| 220 | |
| 221 | $edits = []; |
| 222 | foreach ( $result as $row ) { |
| 223 | $edits[] = $this->createEditFromRow( $row ); |
| 224 | } |
| 225 | return $edits; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Given an stdClass instance, that represents |
| 230 | * a row from "cx_significant_edits" table, this |
| 231 | * method creates a RecentSignificantEdit object |
| 232 | * and returns it. |
| 233 | * |
| 234 | * @param \stdClass $row |
| 235 | * @return RecentSignificantEdit |
| 236 | */ |
| 237 | private function createEditFromRow( \stdClass $row ): RecentSignificantEdit { |
| 238 | // json_decode should always return an array and not an \stdClass instance. Although we do not |
| 239 | // store associative arrays, we somehow get errors for this field. These errors can also occur |
| 240 | // because of empty arrays being encoded as "{}", instead of [] by "json_encode" function. However, |
| 241 | // we do not store any significant edit in the database when section titles are an empty array. |
| 242 | // In any case, here we are making sure that section titles are always an indexed array, to avoid |
| 243 | // such errors being thrown. |
| 244 | // TODO: Investigate what value causes the error (https://phabricator.wikimedia.org/T319799) and |
| 245 | // how end up with this unexpected value |
| 246 | $sectionTitles = array_values( json_decode( $row->cxse_section_titles, true ) ); |
| 247 | |
| 248 | return new RecentSignificantEdit( |
| 249 | (int)$row->cxse_id, |
| 250 | (int)$row->cxse_global_user_id, |
| 251 | (int)$row->cxse_page_wikidata_id, |
| 252 | $row->cxse_language, |
| 253 | $row->cxse_page_title, |
| 254 | $sectionTitles, |
| 255 | $row->cxse_timestamp |
| 256 | ); |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Given a RecentSignificantEdit model, this method |
| 261 | * returns an array containing the corresponding |
| 262 | * fields and values, to be stored in the database. |
| 263 | * |
| 264 | * @param RecentSignificantEdit $edit |
| 265 | * @return array |
| 266 | */ |
| 267 | private function normalizeEdit( RecentSignificantEdit $edit ): array { |
| 268 | return [ |
| 269 | 'cxse_global_user_id' => $edit->getUserId(), |
| 270 | 'cxse_page_wikidata_id' => $edit->getPageWikidataId(), |
| 271 | 'cxse_language' => $edit->getLanguage(), |
| 272 | 'cxse_wiki_family' => $this->currentWikiFamilyKey, |
| 273 | 'cxse_page_title' => $edit->getPageTitle(), |
| 274 | 'cxse_section_titles' => json_encode( $edit->getSectionTitles() ), |
| 275 | 'cxse_timestamp' => $edit->getTimestamp(), |
| 276 | ]; |
| 277 | } |
| 278 | |
| 279 | } |