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   1 /**
   2  * Copyright (c) 2010-2023 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.prowl.internal;
  14
  15 import static org.openhab.binding.prowl.internal.ProwlBindingConstants.*;
  16
  17 import java.util.Collection;
  18 import java.util.List;
  19 import java.util.concurrent.ExecutionException;
  20 import java.util.concurrent.ScheduledFuture;
  21 import java.util.concurrent.TimeUnit;
  22 import java.util.concurrent.TimeoutException;
  23
  24 import org.eclipse.jdt.annotation.NonNullByDefault;
  25 import org.eclipse.jdt.annotation.Nullable;
  26 import org.eclipse.jetty.client.HttpClient;
  27 import org.eclipse.jetty.client.api.ContentResponse;
  28 import org.eclipse.jetty.client.util.StringContentProvider;
  29 import org.openhab.binding.prowl.internal.action.ProwlActions;
  30 import org.openhab.core.library.types.DecimalType;
  31 import org.openhab.core.thing.ChannelUID;
  32 import org.openhab.core.thing.Thing;
  33 import org.openhab.core.thing.ThingStatus;
  34 import org.openhab.core.thing.binding.BaseThingHandler;
  35 import org.openhab.core.thing.binding.ThingHandlerService;
  36 import org.openhab.core.types.Command;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 /**
  41  * The {@link ProwlHandler} is responsible for handling commands, which are
  42  * sent to one of the channels.
  43  *
  44  * @author Ondrej Pecta - Initial contribution
  45  */
  46 @NonNullByDefault
  47 public class ProwlHandler extends BaseThingHandler {
  48
  49     private final Logger logger = LoggerFactory.getLogger(ProwlHandler.class);
  50
  51     private ProwlConfiguration config = new ProwlConfiguration();
  52     private final HttpClient httpClient;
  53
  54     /**
  55      * Future to poll for status
  56      */
  57     private @Nullable ScheduledFuture<?> statusFuture;
  58
  59     public ProwlHandler(Thing thing, HttpClient client) {
  60         super(thing);
  61         this.httpClient = client;
  62     }
  63
  64     @Override
  65     public void handleCommand(ChannelUID channelUID, Command command) {
  66     }
  67
  68     @Override
  69     public void initialize() {
  70         config = getConfigAs(ProwlConfiguration.class);
  71         updateStatus(ThingStatus.UNKNOWN);
  72
  73         statusFuture = scheduler.scheduleWithFixedDelay(() -> updateStatus(), 0, config.refresh, TimeUnit.MINUTES);
  74     }
  75
  76     private void updateStatus() {
  77         if (keyVerificationSucceeded(config.apiKey)) {
  78             updateStatus(ThingStatus.ONLINE);
  79         } else {
  80             updateStatus(ThingStatus.OFFLINE);
  81         }
  82     }
  83
  84     @Override
  85     public void dispose() {
  86         ScheduledFuture<?> localPollFuture = statusFuture;
  87         if (localPollFuture != null && !localPollFuture.isCancelled()) {
  88             localPollFuture.cancel(true);
  89         }
  90         super.dispose();
  91     }
  92
  93     private boolean keyVerificationSucceeded(String apiKey) {
  94         try {
  95             ContentResponse response = httpClient.GET(PROWL_VERIFY_URI + "?apikey=" + apiKey);
  96             String resp = response.getContentAsString();
  97             logger.trace("verify response: {}", resp);
  98             if (resp.contains("<success code=\"200\"")) {
  99                 updateFreeMessages(resp);
 100                 return true;
 101             } else {
 102                 return false;
 103             }
 104         } catch (InterruptedException e) {
 105             Thread.currentThread().interrupt();
 106         } catch (ExecutionException e) {
 107             logger.debug("error during calling uri: {}", PROWL_ADD_URI, e);
 108         } catch (TimeoutException e) {
 109             logger.debug("timeout during calling uri: {}", PROWL_ADD_URI, e);
 110         }
 111         return false;
 112     }
 113
 114     @Override
 115     public Collection<Class<? extends ThingHandlerService>> getServices() {
 116         return List.of(ProwlActions.class);
 117     }
 118
 119     public void pushNotification(@Nullable String event, @Nullable String description) {
 120         pushNotification(event, description, 0);
 121     }
 122
 123     public void pushNotification(@Nullable String event, @Nullable String description, int priority) {
 124         if (event == null || description == null) {
 125             logger.debug("Cannot push message with null event or null description");
 126             return;
 127         }
 128
 129         if (priority < -2) {
 130             priority = -2;
 131         } else if (priority > 2) {
 132             priority = 2;
 133         }
 134
 135         logger.debug("Pushing an event: {} with desc: {}", event, description);
 136         try {
 137             ContentResponse response = httpClient.POST(PROWL_ADD_URI).timeout(5, TimeUnit.SECONDS)
 138                     .content(
 139                             new StringContentProvider("apikey=" + config.apiKey + "&application=" + config.application
 140                                     + "&event=" + event + "&description=" + description + "&priority=" + priority),
 141                             "application/x-www-form-urlencoded; charset=UTF-8")
 142                     .send();
 143             String resp = response.getContentAsString();
 144             updateFreeMessages(resp);
 145             logger.trace("add response: {}", resp);
 146         } catch (InterruptedException e) {
 147             Thread.currentThread().interrupt();
 148         } catch (ExecutionException e) {
 149             logger.debug("error during calling uri: {}", PROWL_ADD_URI, e);
 150         } catch (TimeoutException e) {
 151             logger.debug("timeout during calling uri: {}", PROWL_ADD_URI, e);
 152         }
 153     }
 154
 155     private void updateFreeMessages(String resp) {
 156         final String str = "remaining=\"";
 157
 158         // trying to simply parse the simple xml rather than using XPATH
 159         int start = resp.indexOf(str) + str.length();
 160         int end = resp.indexOf("\"", start + 1);
 161
 162         try {
 163             String messages = resp.substring(start, end);
 164             logger.debug("remaining messages parsed: {}", messages);
 165             int freeMessages = Integer.parseInt(messages);
 166             updateState(CHANNEL_REMAINING, new DecimalType(freeMessages));
 167         } catch (StringIndexOutOfBoundsException | NumberFormatException ex) {
 168             logger.debug("Error parsing remaining messages", ex);
 169         }
 170     }
 171 }