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   1 /**
   2  * Copyright (c) 2010-2020 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.siemensrds.internal;
  14
  15 import static org.openhab.binding.siemensrds.internal.RdsBindingConstants.*;
  16
  17 import java.io.IOException;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.core.thing.Bridge;
  22 import org.openhab.core.thing.ChannelUID;
  23 import org.openhab.core.thing.ThingStatus;
  24 import org.openhab.core.thing.ThingStatusDetail;
  25 import org.openhab.core.thing.binding.BaseBridgeHandler;
  26 import org.openhab.core.types.Command;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 import com.google.gson.JsonParseException;
  31
  32 /**
  33  * The {@link RdsCloudHandler} is the handler for Siemens RDS cloud account (
  34  * also known as the Climatix IC server account )
  35  *
  36  * @author Andrew Fiddian-Green - Initial contribution
  37  *
  38  */
  39 @NonNullByDefault
  40 public class RdsCloudHandler extends BaseBridgeHandler {
  41
  42     private final Logger logger = LoggerFactory.getLogger(RdsCloudHandler.class);
  43
  44     private @Nullable RdsCloudConfiguration config = null;
  45
  46     private @Nullable RdsAccessToken accessToken = null;
  47
  48     public RdsCloudHandler(Bridge bridge) {
  49         super(bridge);
  50     }
  51
  52     @Override
  53     public void handleCommand(ChannelUID channelUID, Command command) {
  54         // there is nothing to do
  55     }
  56
  57     @Override
  58     public void initialize() {
  59         RdsCloudConfiguration config = this.config = getConfigAs(RdsCloudConfiguration.class);
  60
  61         if (config.userEmail.isEmpty()) {
  62             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "missing email address");
  63             return;
  64         }
  65
  66         if (config.userPassword.isEmpty()) {
  67             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "missing password");
  68             return;
  69         }
  70
  71         if (logger.isDebugEnabled())
  72             logger.debug("polling interval={}", config.pollingInterval);
  73
  74         if (config.pollingInterval < FAST_POLL_INTERVAL || config.pollingInterval > LAZY_POLL_INTERVAL) {
  75             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
  76                     String.format("polling interval out of range [%d..%d]", FAST_POLL_INTERVAL, LAZY_POLL_INTERVAL));
  77             return;
  78         }
  79     }
  80
  81     @Override
  82     public void dispose() {
  83         // there is nothing to do
  84     }
  85
  86     /*
  87      * public method: used by RDS smart thermostat handlers return the polling
  88      * interval (seconds)
  89      */
  90     public int getPollInterval() throws RdsCloudException {
  91         RdsCloudConfiguration config = this.config;
  92         if (config != null) {
  93             return config.pollingInterval;
  94         }
  95         throw new RdsCloudException("missing polling interval");
  96     }
  97
  98     /*
  99      * private method: check if the current token is valid, and renew it if
 100      * necessary
 101      */
 102     private synchronized void refreshToken() {
 103         RdsCloudConfiguration config = this.config;
 104         RdsAccessToken accessToken = this.accessToken;
 105
 106         if (accessToken == null || accessToken.isExpired()) {
 107             try {
 108                 if (config == null) {
 109                     throw new RdsCloudException("missing configuration");
 110                 }
 111
 112                 String url = URL_TOKEN;
 113                 String payload = String.format(TOKEN_REQUEST, config.userEmail, config.userPassword);
 114
 115                 logger.debug(LOG_HTTP_COMMAND, HTTP_POST, url.length());
 116                 logger.debug(LOG_PAYLOAD_FMT, LOG_SENDING_MARK, url);
 117                 logger.debug(LOG_PAYLOAD_FMT, LOG_SENDING_MARK, payload);
 118
 119                 String json = RdsAccessToken.httpGetTokenJson(config.apiKey, payload);
 120
 121                 if (logger.isTraceEnabled()) {
 122                     logger.trace(LOG_CONTENT_LENGTH, LOG_RECEIVED_MSG, json.length());
 123                     logger.trace(LOG_PAYLOAD_FMT, LOG_RECEIVED_MARK, json);
 124                 } else if (logger.isDebugEnabled()) {
 125                     logger.debug(LOG_CONTENT_LENGTH_ABR, LOG_RECEIVED_MSG, json.length());
 126                     logger.debug(LOG_PAYLOAD_FMT_ABR, LOG_RECEIVED_MARK,
 127                             json.substring(0, Math.min(json.length(), 30)));
 128                 }
 129
 130                 accessToken = this.accessToken = RdsAccessToken.createFromJson(json);
 131             } catch (RdsCloudException e) {
 132                 logger.warn(LOG_SYSTEM_EXCEPTION, "refreshToken()", e.getClass().getName(), e.getMessage());
 133             } catch (JsonParseException | IOException e) {
 134                 logger.warn(LOG_RUNTIME_EXCEPTION, "refreshToken()", e.getClass().getName(), e.getMessage());
 135             }
 136         }
 137
 138         if (accessToken != null) {
 139             if (getThing().getStatus() != ThingStatus.ONLINE) {
 140                 updateStatus(ThingStatus.ONLINE, ThingStatusDetail.NONE, "cloud server responded");
 141             }
 142         } else {
 143             if (getThing().getStatus() == ThingStatus.ONLINE) {
 144                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 145                         "cloud server authentication error");
 146             }
 147         }
 148     }
 149
 150     /*
 151      * public method: used by RDS smart thermostat handlers to fetch the current
 152      * token
 153      */
 154     public synchronized String getToken() throws RdsCloudException {
 155         refreshToken();
 156         RdsAccessToken accessToken = this.accessToken;
 157         if (accessToken != null) {
 158             return accessToken.getToken();
 159         }
 160         throw new RdsCloudException("no access token");
 161     }
 162
 163     public String getApiKey() throws RdsCloudException {
 164         RdsCloudConfiguration config = this.config;
 165         if (config != null) {
 166             return config.apiKey;
 167         }
 168         throw new RdsCloudException("no api key");
 169     }
 170 }