RFXComCurtain1Message.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.rfxcom.internal.messages;

import java.util.Arrays;
import java.util.List;

import javax.xml.bind.DatatypeConverter;

import org.openhab.binding.rfxcom.RFXComValueSelector;
import org.openhab.binding.rfxcom.internal.RFXComException;
import org.openhab.core.library.items.NumberItem;
import org.openhab.core.library.items.RollershutterItem;
import org.openhab.core.library.items.StringItem;
import org.openhab.core.library.types.DecimalType;
import org.openhab.core.library.types.OpenClosedType;
import org.openhab.core.library.types.StopMoveType;
import org.openhab.core.library.types.StringType;
import org.openhab.core.library.types.UpDownType;
import org.openhab.core.types.State;
import org.openhab.core.types.Type;
import org.openhab.core.types.UnDefType;

/**
 * RFXCOM data class for curtain1 message. See Harrison.
 *
 * @author Evert van Es
 * @since 1.2.0
 *
 */
public class RFXComCurtain1Message extends RFXComBaseMessage {

    public enum SubType {
        HARRISON(0),

        UNKNOWN(255);

        private final int subType;

        SubType(int subType) {
            this.subType = subType;
        }

        SubType(byte subType) {
            this.subType = subType;
        }

        public byte toByte() {
            return (byte) subType;
        }

        public static SubType fromByte(int input) {
            for (SubType c : SubType.values()) {
                if (c.subType == input) {
                    return c;
                }
            }

            return SubType.UNKNOWN;
        }
    }

    public enum Commands {
        OPEN(0),
        CLOSE(1),
        STOP(2),
        PROGRAM(3),

        UNKNOWN(255);

        private final int command;

        Commands(int command) {
            this.command = command;
        }

        Commands(byte command) {
            this.command = command;
        }

        public byte toByte() {
            return (byte) command;
        }

        public static Commands fromByte(int input) {
            for (Commands c : Commands.values()) {
                if (c.command == input) {
                    return c;
                }
            }

            return Commands.UNKNOWN;
        }
    }

    private final static List<RFXComValueSelector> supportedValueSelectors = Arrays.asList(RFXComValueSelector.RAW_DATA,
            RFXComValueSelector.SIGNAL_LEVEL, RFXComValueSelector.BATTERY_LEVEL, RFXComValueSelector.COMMAND);

    public SubType subType = SubType.UNKNOWN;
    public char sensorId = 'A';
    public byte unitcode = 0;
    public Commands command = Commands.UNKNOWN;
    public byte signalLevel = 0;
    public byte batteryLevel = 0;

    public RFXComCurtain1Message() {
        packetType = PacketType.CURTAIN1;
    }

    public RFXComCurtain1Message(byte[] data) {
        encodeMessage(data);
    }

    @Override
    public String toString() {
        String str = "";

        str += super.toString();
        str += "\n - Sub type = " + subType;
        str += "\n - Id = " + sensorId;
        str += "\n - Unit code = " + unitcode;
        str += "\n - Command = " + command;
        str += "\n - Signal level = " + signalLevel;
        str += "\n - Battery level = " + batteryLevel;

        return str;
    }

    @Override
    public void encodeMessage(byte[] data) {

        super.encodeMessage(data);

        subType = SubType.fromByte(super.subType);
        sensorId = (char) data[4];
        unitcode = data[5];
        command = Commands.fromByte(data[6]);
        signalLevel = (byte) ((data[7] & 0xF0) >> 4);
        batteryLevel = (byte) ((data[7] & 0x0F));
    }

    @Override
    public byte[] decodeMessage() {
        // Example data 07 18 00 00 65 01 00 00
        // 07 18 00 00 65 02 00 00

        byte[] data = new byte[8];

        data[0] = 0x07;
        data[1] = 0x18;
        data[2] = subType.toByte();
        data[3] = seqNbr;
        data[4] = (byte) sensorId;
        data[5] = unitcode;
        data[6] = command.toByte();
        data[7] = (byte) (((signalLevel & 0x0F) << 4) + batteryLevel);

        return data;
    }

    @Override
    public String generateDeviceId() {
        return sensorId + "." + unitcode;
    }

    @Override
    public State convertToState(RFXComValueSelector valueSelector) throws RFXComException {

        org.openhab.core.types.State state = UnDefType.UNDEF;

        if (valueSelector.getItemClass() == NumberItem.class) {

            if (valueSelector == RFXComValueSelector.SIGNAL_LEVEL) {

                state = new DecimalType(signalLevel);

            } else if (valueSelector == RFXComValueSelector.BATTERY_LEVEL) {

                state = new DecimalType(batteryLevel);

            } else {
                throw new RFXComException("Can't convert " + valueSelector + " to NumberItem");
            }

        } else if (valueSelector.getItemClass() == RollershutterItem.class) {

            if (valueSelector == RFXComValueSelector.COMMAND) {

                switch (command) {
                    case CLOSE:
                        state = OpenClosedType.CLOSED;
                        break;

                    case OPEN:
                        state = OpenClosedType.OPEN;
                        break;

                    default:
                        break;
                }

            } else {
                throw new RFXComException("Can't convert " + valueSelector + " to SwitchItem");
            }

        } else if (valueSelector.getItemClass() == StringItem.class) {

            if (valueSelector == RFXComValueSelector.RAW_DATA) {

                state = new StringType(DatatypeConverter.printHexBinary(rawMessage));

            } else {
                throw new RFXComException("Can't convert " + valueSelector + " to StringItem");
            }

        } else {

            throw new RFXComException("Can't convert " + valueSelector + " to " + valueSelector.getItemClass());

        }

        return state;
    }

    @Override
    public void convertFromState(RFXComValueSelector valueSelector, String id, Object subType, Type type,
            byte seqNumber) throws RFXComException {

        this.subType = ((SubType) subType);
        seqNbr = seqNumber;
        String[] ids = id.split("\\.");
        sensorId = ids[0].charAt(0);
        unitcode = Byte.parseByte(ids[1]);

        switch (valueSelector) {
            case SHUTTER:
                if (type instanceof OpenClosedType) {
                    command = (type == OpenClosedType.CLOSED ? Commands.CLOSE : Commands.OPEN);
                } else if (type instanceof UpDownType) {
                    command = (type == UpDownType.UP ? Commands.CLOSE : Commands.OPEN);
                } else if (type instanceof StopMoveType) {
                    command = Commands.STOP;

                } else {
                    throw new RFXComException("Can't convert " + type + " to Command");
                }
                break;

            default:
                throw new RFXComException("Can't convert " + type + " to " + valueSelector);
        }

    }

    @Override
    public Object convertSubType(String subType) throws RFXComException {

        for (SubType s : SubType.values()) {
            if (s.toString().equals(subType)) {
                return s;
            }
        }

        throw new RFXComException("Unknown sub type " + subType);
    }

    @Override
    public List<RFXComValueSelector> getSupportedValueSelectors() throws RFXComException {
        return supportedValueSelectors;
    }

}