Delete all megacool recordings

delete.m

- (void)deleteAllRecordings {
    int count = 0;
    NSFileManager *fileManager = NSFileManager.defaultManager;
    NSURL *appSupport =
        [fileManager URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask][0];
    NSURL *megacoolAppSupport = [appSupport URLByAppendingPathComponent:@"Megacool" isDirectory:YES];
    NSError *error;
    NSArray<NSURL *> *recordingDirectories = [fileManager
                                              contentsOfDirectoryAtURL:megacoolAppSupport
                                              includingPropertiesForKeys:nil
                                              options:0
                                              error:&error];
    if (!recordingDirectories) {
        NSLog(@"Couldn't list Megacool recordings: %@", error.localizedDescription);
        return;
    }

    for (NSURL *recordingDirectory in recordingDirectories) {
        // All recording directories are a hex hash of the recordingId
        if (recordingDirectory.lastPathComponent.length != 32) {
            NSLog(@"Not deleting non-recording directory %@", recordingDirectory.absoluteString);
            continue;
        }

        NSString *recordingId = @"UNKNOWN";
        // Not necessary, but parse the details of the recording to log which recording it was
        NSURL *recordingStateFile = [recordingDirectory URLByAppendingPathComponent:@"state.json"];
        NSData *binaryState = [fileManager contentsAtPath:recordingStateFile.path];
        if (!binaryState) {
            NSLog(@"Failed to load state for recording at %@, deleting anyway", recordingStateFile);
        } else {
            NSDictionary *state = [NSJSONSerialization JSONObjectWithData:binaryState options:0 error:&error];
            if (!state) {
                NSLog(@"Could not deserialize recording state: %@", error.localizedDescription);
            } else {
                recordingId = state[@"recordingId"];
            }
        }

        NSLog(@"Deleting recording '%@' at %@", recordingId, recordingDirectory.absoluteString);
        if (![fileManager removeItemAtURL:recordingDirectory error:&error] &&
            error.code != NSFileNoSuchFileError) {
            NSLog(@"Failed to delete recording '%@': %@", recordingId, error.localizedDescription);
        } else {
            count += 1;
        }
    }
    NSLog(@"Deleted %d recordings", count);
}