Gazelle/sections/artist/rename.php

<?
/****************************************************************
 *--------------[  Rename artist  ]-----------------------------*
 * This page handles the backend of the 'rename artist'		*
 * feature. It is quite resource intensive, which is okay	*
 * since it's rarely used. 					*
 * 								*
 * If there is no artist with the target name, it simply 	*
 * renames the artist. However, if there is an artist with the	*
 * target name, things gut funky - the artists must be merged,	*
 * along with their torrents. 					*
 * 								*
 * In the event of a merger, the description of THE TARGET 	*
 * ARTIST will be used as the description of the final result. 	*
 * The same applies for torrents. 				*
 * 								*
 * Tags are not merged along with the torrents. 		*
 * Neither are similar artists. 				*
 *								*
 * We can add these features eventually. 			*
 ****************************************************************/

authorize();

$ArtistID = $_POST['artistid'];
$NewName = Artists::normalise_artist_name($_POST['name']);

if (!$ArtistID || !is_number($ArtistID)) {
	error(404);
}

if (!check_perms('torrents_edit')) {
	error(403);
}

$DB->query("SELECT Name FROM artists_group WHERE ArtistID='$ArtistID'");
if (!$DB->has_results()) {
	error(404);
}
list($OldName) = $DB->next_record(MYSQLI_NUM, false);
if ($OldName == $NewName) {
	error('The new name is identical to the old name.');
}

$DB->query("
	SELECT AliasID
	FROM artists_alias
	WHERE Name='".db_string($OldName)."'
		AND ArtistID='$ArtistID'");
list($OldAliasID) = $DB->next_record(MYSQLI_NUM, false);
if (!$OldAliasID) {
	error('Could not find old alias ID');
}

$DB->query("
	SELECT AliasID, ArtistID
	FROM artists_alias
	WHERE name LIKE '".db_string($NewName, true)."'");
list($TargetAliasID, $TargetArtistID) = $DB->next_record(MYSQLI_NUM, false);

if (!$TargetAliasID || $TargetAliasID==$OldAliasID) {
	// no merge, just rename
	$DB->query("
		INSERT INTO artists_alias (ArtistID, Name, Redirect, UserID)
		VALUES ($ArtistID, '".db_string($NewName)."', '0', '$LoggedUser[ID]')");
	$TargetAliasID = $DB->inserted_id();

	$DB->query("UPDATE artists_alias SET Redirect='$TargetAliasID' WHERE AliasID='$OldAliasID'");
	$DB->query("UPDATE artists_group SET Name='".db_string($NewName)."' WHERE ArtistID='$ArtistID'");

	$DB->query("SELECT GroupID FROM torrents_artists WHERE AliasID='$OldAliasID'");
	$Groups = $DB->collect('GroupID');
	$DB->query("UPDATE IGNORE torrents_artists SET AliasID='$TargetAliasID' WHERE AliasID='$OldAliasID'");
	$DB->query("DELETE FROM torrents_artists WHERE AliasID='$OldAliasID'");
	if (!empty($Groups)) {
		foreach ($Groups as $GroupID) {
			$Cache->delete_value('groups_artists_'.$GroupID); // Delete group artist cache
			Torrents::update_hash($GroupID);
		}
	}

	$DB->query("SELECT RequestID FROM requests_artists WHERE AliasID='$OldAliasID'");
	$Requests = $DB->collect('RequestID');
	$DB->query("UPDATE IGNORE requests_artists SET AliasID='$TargetAliasID' WHERE AliasID='$OldAliasID'");
	$DB->query("DELETE FROM requests_artists WHERE AliasID='$OldAliasID'");
	if (!empty($Requests)) {
		foreach ($Requests as $RequestID) {
			$Cache->delete_value('request_artists_'.$RequestID); // Delete request artist cache
			Requests::update_sphinx_requests($RequestID);
		}
	}
	$TargetArtistID = $ArtistID;

} else {	// Merge stuff
	$DB->query("
		UPDATE artists_alias
		SET Redirect='$TargetAliasID', ArtistID='$TargetArtistID'
		WHERE AliasID='$OldAliasID'");
	$DB->query("UPDATE artists_alias SET Redirect='0' WHERE AliasID='$TargetAliasID'");
	if ($ArtistID != $TargetArtistID) {
		$DB->query("UPDATE artists_alias SET ArtistID='$TargetArtistID' WHERE ArtistID='$ArtistID'");
		$DB->query("DELETE FROM artists_group WHERE ArtistID='$ArtistID'");
	} else {
		$DB->query("UPDATE artists_group SET Name='".db_string($NewName)."' WHERE ArtistID='$ArtistID'");
	}

	$DB->query("SELECT GroupID FROM torrents_artists WHERE AliasID='$OldAliasID'");
	$Groups = $DB->collect('GroupID');
	$DB->query("
		UPDATE IGNORE torrents_artists
		SET AliasID='$TargetAliasID', ArtistID='$TargetArtistID'
		WHERE AliasID='$OldAliasID'");
	$DB->query("DELETE FROM torrents_artists WHERE AliasID='$OldAliasID'");
	if (!empty($Groups)) {
		foreach ($Groups as $GroupID) {
			$Cache->delete_value('groups_artists_'.$GroupID);
			Torrents::update_hash($GroupID);
		}
	}

	$DB->query("SELECT RequestID FROM requests_artists WHERE AliasID='$OldAliasID'");
	$Requests = $DB->collect('RequestID');
	$DB->query("
		UPDATE IGNORE requests_artists
		SET AliasID='$TargetAliasID', ArtistID='$TargetArtistID'
		WHERE AliasID='$OldAliasID'");
	$DB->query("DELETE FROM requests_artists WHERE AliasID='$OldAliasID'");
	if (!empty($Requests)) {
		foreach ($Requests as $RequestID) {
			$Cache->delete_value('request_artists_'.$RequestID);
			Requests::update_sphinx_requests($RequestID);
		}
	}

	if ($ArtistID != $TargetArtistID) {
		$DB->query("SELECT GroupID FROM torrents_artists WHERE ArtistID='$ArtistID'");
		$Groups = $DB->collect('GroupID');
		$DB->query("
			UPDATE IGNORE torrents_artists
			SET ArtistID='$TargetArtistID'
			WHERE ArtistID='$ArtistID'");
		$DB->query("DELETE FROM torrents_artists WHERE ArtistID='$ArtistID'");
		if (!empty($Groups)) {
			foreach ($Groups as $GroupID) {
				$Cache->delete_value('groups_artists_'.$GroupID);
				Torrents::update_hash($GroupID);
			}
		}

		$DB->query("SELECT RequestID FROM requests_artists WHERE ArtistID='$ArtistID'");
		$Requests = $DB->collect('RequestID');
		$DB->query("
			UPDATE IGNORE requests_artists
			SET ArtistID='$TargetArtistID'
			WHERE ArtistID='$ArtistID'");
		$DB->query("DELETE FROM requests_artists WHERE ArtistID='$ArtistID'");
		if (!empty($Requests)) {
			foreach ($Requests as $RequestID) {
				$Cache->delete_value('request_artists_'.$RequestID);
				Requests::update_sphinx_requests($RequestID);
			}
		}
	}
}

// Clear torrent caches
$DB->query("SELECT GroupID FROM torrents_artists WHERE ArtistID='$ArtistID'");
while (list($GroupID) = $DB->next_record()) {
	$Cache->delete_value('torrents_details_'.$GroupID);
}

$Cache->delete_value('artist_'.$ArtistID);
$Cache->delete_value('artist_'.$TargetArtistID);
$Cache->delete_value('artists_requests_'.$TargetArtistID);
$Cache->delete_value('artists_requests_'.$ArtistID);

header('Location: artist.php?id='.$TargetArtistID);

?>