SamsungTvGenericBindingProvider.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.samsungtv.internal;

import java.util.HashMap;

import org.apache.commons.lang.StringUtils;
import org.openhab.binding.samsungtv.SamsungTvBindingProvider;
import org.openhab.core.binding.BindingConfig;
import org.openhab.core.items.Item;
import org.openhab.core.library.items.DimmerItem;
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.items.SwitchItem;
import org.openhab.model.item.binding.AbstractGenericBindingProvider;
import org.openhab.model.item.binding.BindingConfigParseException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import de.quist.samy.remocon.Key;

/**
 * <p>
 * This class can parse information from the generic binding format and provides
 * Samsung device binding information from it.
 *
 * <p>
 * The syntax of the binding configuration strings accepted is the following:
 * <p>
 * <code>
 * 	samsungtv="<openHAB-command>:<device-id>:<device-command>[,<openHAB-command>:<device-id>:<device-command>][,...]"
 * </code>
 * <p>
 * where parts in brackets [] signify an optional information.
 * </p>
 *
 * <p>
 * Examples for valid binding configuration strings:
 *
 * <ul>
 * <li><code>samsungtv="1:Livingroom:KEY_1, 2:Livingroom:KEY_2, 3:Livingroom:KEY_3"</code></li>
 * <li><code>samsungtv="INCREASE:Livingroom:KEY_CHUP, DECREASE:Livingroom:KEY_CHDOWN"</code></li>
 * <li><code>samsungtv="UP:Kitchen:KEY_VOLUP, DOWN:Kitchen:KEY_VOLDOWN"</code></li>
 * </ul>
 *
 * @author Pauli Anttila
 * @since 1.2.0
 */
public class SamsungTvGenericBindingProvider extends AbstractGenericBindingProvider
        implements SamsungTvBindingProvider {

    static final Logger logger = LoggerFactory.getLogger(SamsungTvGenericBindingProvider.class);

    /**
     * {@inheritDoc}
     */
    @Override
    public String getBindingType() {
        return "samsungtv";
    }

    /**
     * @{inheritDoc
     */
    @Override
    public void validateItemType(Item item, String bindingConfig) throws BindingConfigParseException {
        if (!(item instanceof SwitchItem || item instanceof NumberItem || item instanceof DimmerItem
                || item instanceof RollershutterItem || item instanceof StringItem)) {
            throw new BindingConfigParseException("item '" + item.getName() + "' is of type '"
                    + item.getClass().getSimpleName()
                    + "', only SwitchItem, NumberItem, DimmerItem, RollershutterItem and StringItem are allowed - please check your *.items configuration");
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void processBindingConfiguration(String context, Item item, String bindingConfig)
            throws BindingConfigParseException {
        super.processBindingConfiguration(context, item, bindingConfig);

        SamsungTvBindingConfig config = new SamsungTvBindingConfig();
        parseBindingConfig(bindingConfig, config);
        addBindingConfig(item, config);
    }

    protected void parseBindingConfig(String bindingConfigs, SamsungTvBindingConfig config)
            throws BindingConfigParseException {

        String bindingConfig = StringUtils.substringBefore(bindingConfigs, ",");
        String bindingConfigTail = StringUtils.substringAfter(bindingConfigs, ",");

        String[] configParts = bindingConfig.trim().split(":");

        if (configParts.length != 3) {
            throw new BindingConfigParseException("Samsung TV binding must contain three parts separated by ':'");
        }

        String command = StringUtils.trim(configParts[0]);
        String tvId = StringUtils.trim(configParts[1]);
        String tvCommand = StringUtils.trim(configParts[2]);

        Key key = Key.valueOf(tvCommand);

        if (key == null) {
            throw new BindingConfigParseException("Unregonized value '" + tvCommand + "'");
        }

        // if there are more commands to parse do that recursively ...
        if (StringUtils.isNotBlank(bindingConfigTail)) {
            parseBindingConfig(bindingConfigTail, config);
        }

        config.put(command, tvId + ":" + tvCommand);
    }

    @Override
    public String getTVCommand(String itemName, String command) {
        SamsungTvBindingConfig config = (SamsungTvBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.get(command) : null;
    }

    /**
     * This is an internal data structure to store information from the binding
     * config strings and use it to answer the requests to the Samsung TV
     * binding provider.
     */
    static class SamsungTvBindingConfig extends HashMap<String, String>implements BindingConfig {

        /** generated serialVersion UID */
        private static final long serialVersionUID = 861870438027351568L;
    }

}