wikimedia / mediawiki

	 */

	public function batchFetchFromURLs( array $urls ) {

		$batched = $inverseUrlMap = [];

		foreach ( $urls as $url ) {

			list( $cluster, $id, $itemID ) = $this->parseURL( $url );

			$batched[$cluster][$id][] = $itemID;

			// false $itemID gets cast to int, but should be ok

			// since we do === from the $itemID in $batched

			$inverseUrlMap[$cluster][$id][$itemID] = $url;

		}

		$ret = [];

		foreach ( $batched as $cluster => $batchByCluster ) {

			$res = $this->batchFetchBlobs( $cluster, $batchByCluster );

			$res = $this->batchFetchBlobs( $cluster, $batchByCluster );

			/** @var HistoryBlob $blob */

			foreach ( $res as $id => $blob ) {

				foreach ( $batchByCluster[$id] as $itemID ) {

					$url = $inverseUrlMap[$cluster][$id][$itemID];

					if ( $itemID === false ) {

						$ret[$url] = $blob;

					} else {

						$ret[$url] = $blob->getItem( $itemID );

					}

				}

			}

		}