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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Data\Utils; |
| 4 | |
| 5 | use BatchRowIterator; |
| 6 | use Flow\Data\ManagerGroup; |
| 7 | use Flow\DbFactory; |
| 8 | use Flow\Model\AbstractRevision; |
| 9 | use Flow\Model\PostRevision; |
| 10 | use Flow\Model\UUID; |
| 11 | use Iterator; |
| 12 | |
| 13 | class UserMerger { |
| 14 | /** |
| 15 | * @var DbFactory |
| 16 | */ |
| 17 | protected $dbFactory; |
| 18 | |
| 19 | /** |
| 20 | * @var ManagerGroup |
| 21 | */ |
| 22 | protected $storage; |
| 23 | |
| 24 | /** |
| 25 | * @var array[][] |
| 26 | */ |
| 27 | protected $config; |
| 28 | |
| 29 | /** |
| 30 | * @param DbFactory $dbFactory |
| 31 | * @param ManagerGroup $storage |
| 32 | */ |
| 33 | public function __construct( DbFactory $dbFactory, ManagerGroup $storage ) { |
| 34 | $this->dbFactory = $dbFactory; |
| 35 | $this->storage = $storage; |
| 36 | $this->config = [ |
| 37 | 'flow_tree_revision' => [ |
| 38 | 'pk' => [ 'tree_rev_id' ], |
| 39 | 'userColumns' => [ |
| 40 | 'tree_orig_user_id' => 'getCreatorTuple', |
| 41 | ], |
| 42 | 'load' => [ $this, 'loadFromTreeRevision' ], |
| 43 | ], |
| 44 | |
| 45 | 'flow_revision' => [ |
| 46 | 'pk' => [ 'rev_id' ], |
| 47 | 'userColumns' => [ |
| 48 | 'rev_user_id' => 'getUserTuple', |
| 49 | 'rev_mod_user_id' => 'getModeratedByTuple', |
| 50 | 'rev_edit_user_id' => 'getLastContentEditUserTuple', |
| 51 | ], |
| 52 | 'load' => [ $this, 'loadFromRevision' ], |
| 53 | 'loadColumns' => [ 'rev_type' ], |
| 54 | ], |
| 55 | ]; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * @return array |
| 60 | */ |
| 61 | public function getAccountFields() { |
| 62 | $fields = []; |
| 63 | $dbw = $this->dbFactory->getDB( DB_PRIMARY ); |
| 64 | foreach ( $this->config as $table => $config ) { |
| 65 | $row = [ |
| 66 | 'db' => $dbw, |
| 67 | $table, |
| 68 | ]; |
| 69 | foreach ( array_keys( $config['userColumns'] ) as $column ) { |
| 70 | $row[] = $column; |
| 71 | } |
| 72 | $fields[] = $row; |
| 73 | } |
| 74 | return $fields; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Called after all databases have been updated. Needs to purge any |
| 79 | * cache that contained data about $oldUser |
| 80 | * |
| 81 | * @param int $oldUserId |
| 82 | * @param int $newUserId |
| 83 | */ |
| 84 | public function finalizeMerge( $oldUserId, $newUserId ) { |
| 85 | $dbw = $this->dbFactory->getDB( DB_PRIMARY ); |
| 86 | foreach ( $this->config as $table => $config ) { |
| 87 | foreach ( $config['userColumns'] as $column => $userTupleGetter ) { |
| 88 | $it = new BatchRowIterator( $dbw, $table, $config['pk'], 500 ); |
| 89 | // The database is migrated, so look for the new user id |
| 90 | $it->addConditions( [ $column => $newUserId ] ); |
| 91 | $it->setCaller( __METHOD__ ); |
| 92 | if ( isset( $config['loadColumns'] ) ) { |
| 93 | $it->setFetchColumns( $config['loadColumns'] ); |
| 94 | } |
| 95 | $this->purgeTable( $it, $oldUserId, $config['load'], $userTupleGetter ); |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * @param Iterator $it |
| 102 | * @param int $oldUserId |
| 103 | * @param callable $callback Receives a single row, returns domain object or null |
| 104 | * @param string $userTupleGetter Method to call on domain object that will return |
| 105 | * a UserTuple instance. |
| 106 | */ |
| 107 | protected function purgeTable( Iterator $it, $oldUserId, $callback, $userTupleGetter ) { |
| 108 | foreach ( $it as $batch ) { |
| 109 | foreach ( $batch as $pkRow ) { |
| 110 | $obj = $callback( $pkRow ); |
| 111 | if ( !$obj ) { |
| 112 | continue; |
| 113 | } |
| 114 | // This is funny looking because the loaded objects may have come from |
| 115 | // the db with new user ids, or the cache with old user ids. |
| 116 | // We need to tweak this object to look like the old user ids and then |
| 117 | // purge caches so they get the old user id cache keys. |
| 118 | $tuple = $obj->$userTupleGetter(); |
| 119 | if ( !$tuple ) { |
| 120 | continue; |
| 121 | } |
| 122 | $tuple->id = $oldUserId; |
| 123 | $om = $this->storage->getStorage( get_class( $obj ) ); |
| 124 | $om->clear(); |
| 125 | $om->merge( $obj ); |
| 126 | $om->cachePurge( $obj ); |
| 127 | } |
| 128 | $this->storage->clear(); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * @param object $row Single row from database |
| 134 | * @return PostRevision|null |
| 135 | */ |
| 136 | protected function loadFromTreeRevision( $row ) { |
| 137 | return $this->storage->get( PostRevision::class, $row->tree_rev_id ); |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * @param object $row Single row from database |
| 142 | * @return AbstractRevision|null |
| 143 | */ |
| 144 | protected function loadFromRevision( $row ) { |
| 145 | $revTypes = [ |
| 146 | 'header' => \Flow\Model\Header::class, |
| 147 | 'post-summary' => \Flow\Model\PostSummary::class, |
| 148 | 'post' => PostRevision::class, |
| 149 | ]; |
| 150 | if ( !isset( $revTypes[$row->rev_type] ) ) { |
| 151 | wfDebugLog( 'Flow', __METHOD__ . ': Unknown revision type ' . $row->rev_type . ' did not merge ' . |
| 152 | UUID::create( $row->rev_id )->getAlphadecimal() ); |
| 153 | return null; |
| 154 | } |
| 155 | |
| 156 | return $this->storage->get( $revTypes[$row->rev_type], $row->rev_id ); |
| 157 | } |
| 158 | } |