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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.mqtt.homeassistant.internal;
  14
  15 import java.net.URI;
  16 import java.util.concurrent.CompletableFuture;
  17 import java.util.concurrent.ScheduledExecutorService;
  18
  19 import org.apache.commons.lang.StringUtils;
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.mqtt.generic.ChannelConfigBuilder;
  23 import org.openhab.binding.mqtt.generic.ChannelState;
  24 import org.openhab.binding.mqtt.generic.ChannelStateTransformation;
  25 import org.openhab.binding.mqtt.generic.ChannelStateUpdateListener;
  26 import org.openhab.binding.mqtt.generic.MqttChannelTypeProvider;
  27 import org.openhab.binding.mqtt.generic.TransformationServiceProvider;
  28 import org.openhab.binding.mqtt.generic.values.Value;
  29 import org.openhab.binding.mqtt.homeassistant.generic.internal.MqttBindingConstants;
  30 import org.openhab.binding.mqtt.homeassistant.internal.CFactory.ComponentConfiguration;
  31 import org.openhab.core.config.core.Configuration;
  32 import org.openhab.core.io.transport.mqtt.MqttBrokerConnection;
  33 import org.openhab.core.thing.Channel;
  34 import org.openhab.core.thing.ChannelUID;
  35 import org.openhab.core.thing.binding.builder.ChannelBuilder;
  36 import org.openhab.core.thing.type.ChannelDefinition;
  37 import org.openhab.core.thing.type.ChannelDefinitionBuilder;
  38 import org.openhab.core.thing.type.ChannelType;
  39 import org.openhab.core.thing.type.ChannelTypeBuilder;
  40 import org.openhab.core.thing.type.ChannelTypeUID;
  41 import org.openhab.core.types.StateDescription;
  42
  43 /**
  44  * An {@link AbstractComponent}s derived class consists of one or multiple channels.
  45  * Each component channel consists of the determined channel type, channel type UID and the
  46  * channel description itself as well as the the channels state.
  47  *
  48  * After the discovery process has completed and the tree of components and component channels
  49  * have been built up, the channel types are registered to a custom channel type provider
  50  * before adding the channel descriptions to the Thing themselves.
  51  * <br>
  52  * <br>
  53  * An object of this class creates the required {@link ChannelType} and {@link ChannelTypeUID} as well
  54  * as keeps the {@link ChannelState} and {@link Channel} in one place.
  55  *
  56  * @author David Graeff - Initial contribution
  57  */
  58 @NonNullByDefault
  59 public class CChannel {
  60     private static final String JINJA = "JINJA";
  61
  62     private final ChannelUID channelUID;
  63     private final ChannelState channelState;
  64     private final Channel channel;
  65     private final ChannelType type;
  66     private final ChannelTypeUID channelTypeUID;
  67     private final ChannelStateUpdateListener channelStateUpdateListener;
  68
  69     private CChannel(ChannelUID channelUID, ChannelState channelState, Channel channel, ChannelType type,
  70             ChannelTypeUID channelTypeUID, ChannelStateUpdateListener channelStateUpdateListener) {
  71         super();
  72         this.channelUID = channelUID;
  73         this.channelState = channelState;
  74         this.channel = channel;
  75         this.type = type;
  76         this.channelTypeUID = channelTypeUID;
  77         this.channelStateUpdateListener = channelStateUpdateListener;
  78     }
  79
  80     public ChannelUID getChannelUID() {
  81         return channelUID;
  82     }
  83
  84     public Channel getChannel() {
  85         return channel;
  86     }
  87
  88     public ChannelState getState() {
  89         return channelState;
  90     }
  91
  92     public CompletableFuture<@Nullable Void> stop() {
  93         return channelState.stop();
  94     }
  95
  96     public CompletableFuture<@Nullable Void> start(MqttBrokerConnection connection, ScheduledExecutorService scheduler,
  97             int timeout) {
  98         // Make sure we set the callback again which might have been nulled during an stop
  99         channelState.setChannelStateUpdateListener(this.channelStateUpdateListener);
 100
 101         return channelState.start(connection, scheduler, timeout);
 102     }
 103
 104     public void addChannelTypes(MqttChannelTypeProvider channelTypeProvider) {
 105         channelTypeProvider.setChannelType(channelTypeUID, type);
 106     }
 107
 108     public void removeChannelTypes(MqttChannelTypeProvider channelTypeProvider) {
 109         channelTypeProvider.removeChannelType(channelTypeUID);
 110     }
 111
 112     public ChannelDefinition type() {
 113         return new ChannelDefinitionBuilder(channelUID.getId(), channelTypeUID).build();
 114     }
 115
 116     public void resetState() {
 117         channelState.getCache().resetState();
 118     }
 119
 120     public static class Builder {
 121         private AbstractComponent<?> component;
 122         private ComponentConfiguration componentConfiguration;
 123         private String channelID;
 124         private Value valueState;
 125         private String label;
 126         private @Nullable String state_topic;
 127         private @Nullable String command_topic;
 128         private boolean retain;
 129         private boolean trigger;
 130         private @Nullable Integer qos;
 131         private ChannelStateUpdateListener channelStateUpdateListener;
 132
 133         private @Nullable String templateIn;
 134
 135         public Builder(AbstractComponent<?> component, ComponentConfiguration componentConfiguration, String channelID,
 136                 Value valueState, String label, ChannelStateUpdateListener channelStateUpdateListener) {
 137             this.component = component;
 138             this.componentConfiguration = componentConfiguration;
 139             this.channelID = channelID;
 140             this.valueState = valueState;
 141             this.label = label;
 142             this.channelStateUpdateListener = channelStateUpdateListener;
 143         }
 144
 145         public Builder stateTopic(@Nullable String state_topic) {
 146             this.state_topic = state_topic;
 147             return this;
 148         }
 149
 150         public Builder stateTopic(@Nullable String state_topic, @Nullable String... templates) {
 151             this.state_topic = state_topic;
 152             if (StringUtils.isNotBlank(state_topic)) {
 153                 for (String template : templates) {
 154                     if (StringUtils.isNotBlank(template)) {
 155                         this.templateIn = template;
 156                         break;
 157                     }
 158                 }
 159             }
 160             return this;
 161         }
 162
 163         /**
 164          * @deprecated use commandTopic(String, boolean, int)
 165          * @param command_topic
 166          * @param retain
 167          * @return
 168          */
 169         @Deprecated
 170         public Builder commandTopic(@Nullable String command_topic, boolean retain) {
 171             this.command_topic = command_topic;
 172             this.retain = retain;
 173             return this;
 174         }
 175
 176         public Builder commandTopic(@Nullable String command_topic, boolean retain, int qos) {
 177             this.command_topic = command_topic;
 178             this.retain = retain;
 179             this.qos = qos;
 180             return this;
 181         }
 182
 183         public Builder trigger(boolean trigger) {
 184             this.trigger = trigger;
 185             return this;
 186         }
 187
 188         public CChannel build() {
 189             return build(true);
 190         }
 191
 192         public CChannel build(boolean addToComponent) {
 193             ChannelUID channelUID;
 194             ChannelState channelState;
 195             Channel channel;
 196             ChannelType type;
 197             ChannelTypeUID channelTypeUID;
 198
 199             channelUID = new ChannelUID(component.channelGroupUID, channelID);
 200             channelTypeUID = new ChannelTypeUID(MqttBindingConstants.BINDING_ID,
 201                     channelUID.getGroupId() + "_" + channelID);
 202             channelState = new ChannelState(
 203                     ChannelConfigBuilder.create().withRetain(retain).withQos(qos).withStateTopic(state_topic)
 204                             .withCommandTopic(command_topic).makeTrigger(trigger).build(),
 205                     channelUID, valueState, channelStateUpdateListener);
 206
 207             if (StringUtils.isBlank(state_topic) || this.trigger) {
 208                 type = ChannelTypeBuilder.trigger(channelTypeUID, label)
 209                         .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HA_CHANNEL)).build();
 210             } else {
 211                 StateDescription description = valueState.createStateDescription(command_topic == null).build()
 212                         .toStateDescription();
 213                 type = ChannelTypeBuilder.state(channelTypeUID, label, channelState.getItemType())
 214                         .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HA_CHANNEL))
 215                         .withStateDescription(description).build();
 216             }
 217
 218             Configuration configuration = new Configuration();
 219             configuration.put("config", component.channelConfigurationJson);
 220             component.haID.toConfig(configuration);
 221
 222             channel = ChannelBuilder.create(channelUID, channelState.getItemType()).withType(channelTypeUID)
 223                     .withKind(type.getKind()).withLabel(label).withConfiguration(configuration).build();
 224
 225             CChannel result = new CChannel(channelUID, channelState, channel, type, channelTypeUID,
 226                     channelStateUpdateListener);
 227
 228             @Nullable
 229             TransformationServiceProvider transformationProvider = componentConfiguration
 230                     .getTransformationServiceProvider();
 231
 232             final String templateIn = this.templateIn;
 233             if (templateIn != null && transformationProvider != null) {
 234                 channelState
 235                         .addTransformation(new ChannelStateTransformation(JINJA, templateIn, transformationProvider));
 236             }
 237             if (addToComponent) {
 238                 component.channels.put(channelID, result);
 239             }
 240             return result;
 241         }
 242     }
 243 }