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/*
 * Copyright (c) 2010-2017, KolibriFX AS. Licensed under the Apache License, version 2.0.
 */

package com.kolibrifx.plovercrest.server.internal.protocol;

import com.kolibrifx.plovercrest.client.internal.RemoteCommand;
import com.kolibrifx.plovercrest.server.security.AccessKind;

public final class AccessControlUtils {
    private AccessControlUtils() {
    }

    /**
     * Returns an access kind for the given command, or null if all clients should be
     * allowed.
     */
    public static AccessKind getAccessKindForCommand(final RemoteCommand command) {
        switch (command) {
            case CREATE:
            case CREATE_TABLE_IF_MISSING:
                return AccessKind.CREATE;
            case DELETE:
                return AccessKind.DELETE;
            case RENAME:
                return AccessKind.RENAME;
            case FLUSH:
            case FREEZE:
            case MULTI_WRITE:
            case MULTI_WRITE_ACK:
            case MULTI_WRITE_INIT:
            case UNFREEZE:
            case WRITE:
                return AccessKind.WRITE;
            case OPEN:
            case READ_CONTINUE_NON_OVERLAPPING:
            case READ_CONTINUE_OVERLAPPING:
            case READ_ELEMENT_INDEX:
            case READ_START_NON_OVERLAPPING:
            case READ_START_OVERLAPPING:
            case SUBSCRIBE:
            case TABLE_INFO:
                return AccessKind.READ;
            case HANDSHAKE: // always allowed, needed to initialize ClientInfo
            case UNSUBSCRIBE:
                return null;
            case LIST:
            case SUBSCRIBE_GLOBAL: // table names subscription
                return AccessKind.LIST;
            default:
                throw new IllegalStateException("Unhandled command " + command);
        }
    }
}