SallegraNode.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.sallegra.internal;

import org.openhab.binding.sallegra.internal.xml.XmlUtils;
import org.openhab.core.library.types.DecimalType;
import org.openhab.core.library.types.OnOffType;
import org.openhab.core.types.Command;
import org.openhab.io.net.http.HttpUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Node structure to kindly represent a Sallegra Module
 *
 * @author Benjamin Marty (Developed on behalf of Satelco.ch)
 * @since 1.8.0
 *
 */
public class SallegraNode {

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

    private static final String GET = "GET";

    /*
     * Suffix for specific recurring Parts in Sallegra Modules
     */
    private static final String SUFFIX_PASSWORD = "pw=";
    private static final String XML_PATH = "current_state.xml";

    /*
     * Suffix for specific recurring Parts in URL gen
     */
    private static final String SUFFIX_DIMMER = "Dimmer";
    private static final String SUFFIX_RELAY = "Relay";

    private String hostName;
    private String password;
    private int timeOut = 10000;

    /*
     * Getter
     */
    public String getHostName() {
        return hostName;
    }

    public String getPassword() {
        return password;
    }

    protected void setHostName(String hostName) {
        this.hostName = hostName;
    }

    protected void setPassword(String password) {
        this.password = password;
    }

    /**
     * Properly configured if hostname & password is set
     */
    public boolean properlyConfigured() {
        return (hostName != null && password != null) || timeOut != 0;
    }

    /**
     * Sets the State of the Relay on the Relay Module
     */
    public void setRelay(Command command, String number) {
        // Check if Instance is Digital OnOff Value
        if (command instanceof OnOffType) {
            if (((OnOffType) command) == OnOffType.ON) {
                String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword() + "&" + SUFFIX_RELAY
                        + number + "=" + "1";
                HttpUtil.executeUrl(GET, URL, this.timeOut);
            } else {
                String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword() + "&" + SUFFIX_RELAY
                        + number + "=" + "0";
                HttpUtil.executeUrl(GET, URL, this.timeOut);
            }
        } else {
            logger.error("Unsupported command type");
        }
    }

    /**
     * Get the State of the Relay on the Relay Module
     */
    public String getRelay(String number) {
        String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword();
        String content = HttpUtil.executeUrl(GET, URL, this.timeOut);

        content = XmlUtils.getContentOfElement(content, SUFFIX_RELAY + number);

        // Get Java happy
        int status = Integer.parseInt(XmlUtils.getContentOfElement(content, "State"));

        if (status == 1) {
            return "ON";
        } else {
            return "OFF";
        }
    }

    /**
     * Sets the State of the Dimmer on the Dimmer Module
     */
    public void setDimmer(Command command, String number) {
        // Check if Instance is a Decimal Value
        if (command instanceof DecimalType) {
            int value = (int) (((DecimalType) command).intValue() * 2.54);
            String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword() + "&" + SUFFIX_DIMMER
                    + number + "=" + value;
            HttpUtil.executeUrl(GET, URL, this.timeOut);

        } else {
            logger.error("Unsupported command type");
        }
    }

    /**
     * 
     * Gets the State of the Dimmer on the Dimmer Module
     */
    public String getDimmer(String number) {
        String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword();
        String content = HttpUtil.executeUrl(GET, URL, this.timeOut);

        content = XmlUtils.getContentOfElement(content, SUFFIX_DIMMER + number);

        double dimmer_value = Double.parseDouble(XmlUtils.getContentOfElement(content, "Value"));
        double calc = Math.round(dimmer_value / 2.54);

        String string_value = String.valueOf((int) calc);

        return string_value;
    }

    /**
     * Gets the State of the Input on the Input Module
     */
    public String getInput(String input) {
        String URL = createURL() + "/" + XML_PATH + "?" + SUFFIX_PASSWORD + getPassword();
        String content = HttpUtil.executeUrl(GET, URL, this.timeOut);

        content = XmlUtils.getContentOfElement(content, input);

        // Get Java happy
        int status = Integer.parseInt(XmlUtils.getContentOfElement(content, "Value"));

        if (status == 1) {
            return "OPEN";
        } else {
            return "CLOSED";
        }
    }

    /**
     * Put "http://" before the hostname/ip
     */
    private String createURL() {
        return "http://" + getHostName();
    }
}