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| 1 | <?php |
| 2 | |
| 3 | use MediaWiki\MediaWikiServices; |
| 4 | use MediaWiki\Title\Title; |
| 5 | |
| 6 | /** |
| 7 | * Page stability configuration functions |
| 8 | */ |
| 9 | class FRPageConfig { |
| 10 | /** |
| 11 | * Get visibility settings/restrictions for a page |
| 12 | * @param Title $title page title |
| 13 | * @param int $flags One of the IDBAccessObject::READ_… constants |
| 14 | * @return array [ 'override' => int, 'autoreview' => string, 'expiry' => string ] |
| 15 | */ |
| 16 | public static function getStabilitySettings( Title $title, $flags = 0 ) { |
| 17 | if ( $flags & IDBAccessObject::READ_LATEST ) { |
| 18 | $db = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase(); |
| 19 | } else { |
| 20 | $db = MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase(); |
| 21 | } |
| 22 | $row = $db->newSelectQueryBuilder() |
| 23 | ->select( [ 'fpc_override', 'fpc_level', 'fpc_expiry' ] ) |
| 24 | ->from( 'flaggedpage_config' ) |
| 25 | ->where( [ 'fpc_page_id' => $title->getArticleID() ] ) |
| 26 | ->caller( __METHOD__ ) |
| 27 | ->fetchRow(); |
| 28 | return self::getVisibilitySettingsFromRow( $row ); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Get page configuration settings from a DB row |
| 33 | * @param stdClass|false $row |
| 34 | * @return array [ 'override' => int, 'autoreview' => string, 'expiry' => string ] |
| 35 | */ |
| 36 | public static function getVisibilitySettingsFromRow( $row ) { |
| 37 | $expiry = false; |
| 38 | if ( $row ) { |
| 39 | $expiry = MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase() |
| 40 | ->decodeExpiry( $row->fpc_expiry ); |
| 41 | # Only apply the settings if they haven't expired |
| 42 | if ( !$expiry || $expiry < wfTimestampNow() ) { |
| 43 | $row = null; // expired |
| 44 | } |
| 45 | } |
| 46 | // Is there a non-expired row? |
| 47 | if ( !$row ) { |
| 48 | # Return the default config if this page doesn't have its own |
| 49 | return self::getDefaultVisibilitySettings(); |
| 50 | } |
| 51 | |
| 52 | $level = self::isValidRestriction( $row->fpc_level ) ? $row->fpc_level : ''; |
| 53 | $config = [ |
| 54 | 'override' => $row->fpc_override ? 1 : 0, |
| 55 | 'autoreview' => $level, |
| 56 | 'expiry' => $expiry // TS_MW |
| 57 | ]; |
| 58 | # If there are protection levels defined check if this is valid... |
| 59 | if ( FlaggedRevs::useProtectionLevels() ) { |
| 60 | $level = self::getProtectionLevel( $config ); |
| 61 | if ( $level == 'invalid' || $level == 'none' ) { |
| 62 | // If 'none', make sure expiry is 'infinity' |
| 63 | return self::getDefaultVisibilitySettings(); // revert to default (none) |
| 64 | } |
| 65 | } |
| 66 | return $config; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Get default stability configuration settings |
| 71 | * @return array |
| 72 | */ |
| 73 | public static function getDefaultVisibilitySettings() { |
| 74 | return [ |
| 75 | # Keep this consistent: 1 => override, 0 => don't |
| 76 | 'override' => FlaggedRevs::isStableShownByDefault() ? 1 : 0, |
| 77 | 'autoreview' => '', |
| 78 | 'expiry' => 'infinity' |
| 79 | ]; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Set the stability configuration settings for a page |
| 84 | * @param Title $title |
| 85 | * @param array $config |
| 86 | * @return bool Row changed |
| 87 | */ |
| 88 | public static function setStabilitySettings( Title $title, array $config ) { |
| 89 | $dbw = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase(); |
| 90 | |
| 91 | # Purge expired entries on one in every 10 queries |
| 92 | if ( !mt_rand( 0, 10 ) ) { |
| 93 | self::purgeExpiredConfigurations(); |
| 94 | } |
| 95 | # If setting to site default values and there is a row then erase it |
| 96 | if ( self::configIsReset( $config ) ) { |
| 97 | $dbw->newDeleteQueryBuilder() |
| 98 | ->deleteFrom( 'flaggedpage_config' ) |
| 99 | ->where( [ 'fpc_page_id' => $title->getArticleID() ] ) |
| 100 | ->caller( __METHOD__ ) |
| 101 | ->execute(); |
| 102 | $changed = ( $dbw->affectedRows() > 0 ); // did this do anything? |
| 103 | # Otherwise, add/replace row if we are not just setting it to the site default |
| 104 | } else { |
| 105 | $dbExpiry = $dbw->encodeExpiry( $config['expiry'] ); |
| 106 | # Get current config... |
| 107 | $oldRow = $dbw->newSelectQueryBuilder() |
| 108 | ->select( [ 'fpc_override', 'fpc_level', 'fpc_expiry' ] ) |
| 109 | ->from( 'flaggedpage_config' ) |
| 110 | ->where( [ 'fpc_page_id' => $title->getArticleID() ] ) |
| 111 | ->forUpdate() // lock |
| 112 | ->caller( __METHOD__ ) |
| 113 | ->fetchRow(); |
| 114 | # Check if this is not the same config as the existing (if any) row |
| 115 | $changed = ( !$oldRow // no previous config |
| 116 | || $oldRow->fpc_override != $config['override'] // ...override changed, or... |
| 117 | || $oldRow->fpc_level != $config['autoreview'] // ...autoreview level changed, or... |
| 118 | || $oldRow->fpc_expiry != $dbExpiry // ...expiry changed |
| 119 | ); |
| 120 | # If the new config is different, replace the old row... |
| 121 | if ( $changed ) { |
| 122 | $dbw->newReplaceQueryBuilder() |
| 123 | ->replaceInto( 'flaggedpage_config' ) |
| 124 | ->uniqueIndexFields( 'fpc_page_id' ) |
| 125 | ->row( [ |
| 126 | 'fpc_page_id' => $title->getArticleID(), |
| 127 | 'fpc_override' => (int)$config['override'], |
| 128 | 'fpc_level' => $config['autoreview'], |
| 129 | 'fpc_expiry' => $dbExpiry |
| 130 | ] ) |
| 131 | ->caller( __METHOD__ ) |
| 132 | ->execute(); |
| 133 | } |
| 134 | } |
| 135 | return $changed; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Does this config equal the default settings? |
| 140 | * @param array $config |
| 141 | * @return bool |
| 142 | */ |
| 143 | public static function configIsReset( array $config ) { |
| 144 | if ( FlaggedRevs::useOnlyIfProtected() ) { |
| 145 | return ( $config['autoreview'] == '' ); |
| 146 | } else { |
| 147 | return ( $config['override'] == FlaggedRevs::isStableShownByDefault() |
| 148 | && $config['autoreview'] == '' ); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Find what protection level a config is in |
| 154 | * @param array $config |
| 155 | * @return string |
| 156 | */ |
| 157 | public static function getProtectionLevel( array $config ) { |
| 158 | if ( !FlaggedRevs::useProtectionLevels() ) { |
| 159 | throw new LogicException( '$wgFlaggedRevsProtection is disabled' ); |
| 160 | } |
| 161 | $defaultConfig = self::getDefaultVisibilitySettings(); |
| 162 | # Check if the page is not protected at all... |
| 163 | if ( $config['override'] == $defaultConfig['override'] |
| 164 | && $config['autoreview'] == '' |
| 165 | ) { |
| 166 | return "none"; // not protected |
| 167 | } |
| 168 | # All protection levels have 'override' on |
| 169 | if ( $config['override'] ) { |
| 170 | # The levels are defined by the 'autoreview' settings |
| 171 | if ( in_array( $config['autoreview'], FlaggedRevs::getRestrictionLevels() ) ) { |
| 172 | return $config['autoreview']; |
| 173 | } |
| 174 | } |
| 175 | return "invalid"; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Check if an fpc_level value is valid |
| 180 | * @param string $right |
| 181 | * @return bool |
| 182 | */ |
| 183 | private static function isValidRestriction( $right ) { |
| 184 | if ( $right == '' ) { |
| 185 | return true; // no restrictions (none) |
| 186 | } |
| 187 | return in_array( $right, FlaggedRevs::getRestrictionLevels(), true ); |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Purge expired restrictions from the flaggedpage_config table. |
| 192 | * The stable version of pages may change and invalidation may be required. |
| 193 | */ |
| 194 | private static function purgeExpiredConfigurations() { |
| 195 | if ( MediaWikiServices::getInstance()->getReadOnlyMode()->isReadOnly() ) { |
| 196 | return; |
| 197 | } |
| 198 | $dbw = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase(); |
| 199 | |
| 200 | # Find pages with expired configs... |
| 201 | $config = self::getDefaultVisibilitySettings(); // config is to be reset |
| 202 | $cutoff = $dbw->timestamp(); |
| 203 | $ret = $dbw->newSelectQueryBuilder() |
| 204 | ->select( [ 'fpc_page_id', 'page_namespace', 'page_title' ] ) |
| 205 | ->from( 'flaggedpage_config' ) |
| 206 | ->join( 'page', null, 'page_id = fpc_page_id' ) |
| 207 | ->where( $dbw->expr( 'fpc_expiry', '<', $cutoff ) ) |
| 208 | ->caller( __METHOD__ ) |
| 209 | ->fetchResultSet(); |
| 210 | # Figured out to do with each page... |
| 211 | $pagesClearConfig = []; |
| 212 | $pagesClearTracking = []; |
| 213 | $titlesClearTracking = []; |
| 214 | foreach ( $ret as $row ) { |
| 215 | # If FlaggedRevs got "turned off" (in protection config) |
| 216 | # for this page, then clear it from the tracking tables... |
| 217 | if ( FlaggedRevs::useOnlyIfProtected() && !$config['override'] ) { |
| 218 | $pagesClearTracking[] = $row->fpc_page_id; // no stable version |
| 219 | $titlesClearTracking[] = Title::newFromRow( $row ); // no stable version |
| 220 | } |
| 221 | $pagesClearConfig[] = $row->fpc_page_id; // page with expired config |
| 222 | } |
| 223 | # Clear the expired config for these pages... |
| 224 | if ( count( $pagesClearConfig ) ) { |
| 225 | $dbw->newDeleteQueryBuilder() |
| 226 | ->deleteFrom( 'flaggedpage_config' ) |
| 227 | ->where( [ 'fpc_page_id' => $pagesClearConfig, $dbw->expr( 'fpc_expiry', '<', $cutoff ) ] ) |
| 228 | ->caller( __METHOD__ ) |
| 229 | ->execute(); |
| 230 | } |
| 231 | # Clear the tracking rows and update page_touched for the |
| 232 | # pages in $pagesClearConfig that do now have a stable version... |
| 233 | if ( count( $pagesClearTracking ) ) { |
| 234 | FlaggedRevs::clearTrackingRows( $pagesClearTracking ); |
| 235 | $dbw->newUpdateQueryBuilder() |
| 236 | ->update( 'page' ) |
| 237 | ->set( [ 'page_touched' => $dbw->timestamp() ] ) |
| 238 | ->where( [ 'page_id' => $pagesClearTracking ] ) |
| 239 | ->caller( __METHOD__ ) |
| 240 | ->execute(); |
| 241 | } |
| 242 | # Also, clear their squid caches and purge other pages that use this page. |
| 243 | # NOTE: all of these updates are deferred via DeferredUpdates |
| 244 | foreach ( $titlesClearTracking as $title ) { |
| 245 | FlaggedRevs::purgeMediaWikiHtmlCdn( $title ); |
| 246 | if ( FlaggedRevs::inclusionSetting() == FR_INCLUDES_STABLE ) { |
| 247 | FlaggedRevs::updateHtmlCaches( $title ); // purge pages that use this page |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | } |