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   1 /**
   2  * Copyright (c) 2010-2021 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 import java.util.function.Predicate;
  19
  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.component.AbstractComponent;
  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.Command;
  42 import org.openhab.core.types.StateDescriptionFragment;
  43
  44 /**
  45  * An {@link AbstractComponent}s derived class consists of one or multiple channels.
  46  * Each component channel consists of the determined channel type, channel type UID and the
  47  * channel description itself as well as the the channels state.
  48  *
  49  * After the discovery process has completed and the tree of components and component channels
  50  * have been built up, the channel types are registered to a custom channel type provider
  51  * before adding the channel descriptions to the Thing themselves.
  52  * <br>
  53  * <br>
  54  * An object of this class creates the required {@link ChannelType} and {@link ChannelTypeUID} as well
  55  * as keeps the {@link ChannelState} and {@link Channel} in one place.
  56  *
  57  * @author David Graeff - Initial contribution
  58  */
  59 @NonNullByDefault
  60 public class ComponentChannel {
  61     private static final String JINJA = "JINJA";
  62
  63     private final ChannelUID channelUID;
  64     private final ChannelState channelState;
  65     private final Channel channel;
  66     private final ChannelType type;
  67     private final ChannelTypeUID channelTypeUID;
  68     private final ChannelStateUpdateListener channelStateUpdateListener;
  69
  70     private ComponentChannel(ChannelUID channelUID, ChannelState channelState, Channel channel, ChannelType type,
  71             ChannelTypeUID channelTypeUID, ChannelStateUpdateListener channelStateUpdateListener) {
  72         super();
  73         this.channelUID = channelUID;
  74         this.channelState = channelState;
  75         this.channel = channel;
  76         this.type = type;
  77         this.channelTypeUID = channelTypeUID;
  78         this.channelStateUpdateListener = channelStateUpdateListener;
  79     }
  80
  81     public ChannelUID getChannelUID() {
  82         return channelUID;
  83     }
  84
  85     public Channel getChannel() {
  86         return channel;
  87     }
  88
  89     public ChannelState getState() {
  90         return channelState;
  91     }
  92
  93     public CompletableFuture<@Nullable Void> stop() {
  94         return channelState.stop();
  95     }
  96
  97     public CompletableFuture<@Nullable Void> start(MqttBrokerConnection connection, ScheduledExecutorService scheduler,
  98             int timeout) {
  99         // Make sure we set the callback again which might have been nulled during an stop
 100         channelState.setChannelStateUpdateListener(this.channelStateUpdateListener);
 101
 102         return channelState.start(connection, scheduler, timeout);
 103     }
 104
 105     public void addChannelTypes(MqttChannelTypeProvider channelTypeProvider) {
 106         channelTypeProvider.setChannelType(channelTypeUID, type);
 107     }
 108
 109     public void removeChannelTypes(MqttChannelTypeProvider channelTypeProvider) {
 110         channelTypeProvider.removeChannelType(channelTypeUID);
 111     }
 112
 113     public ChannelDefinition type() {
 114         return new ChannelDefinitionBuilder(channelUID.getId(), channelTypeUID).build();
 115     }
 116
 117     public void resetState() {
 118         channelState.getCache().resetState();
 119     }
 120
 121     public static class Builder {
 122         private final AbstractComponent<?> component;
 123         private final String channelID;
 124         private final Value valueState;
 125         private final String label;
 126         private final ChannelStateUpdateListener channelStateUpdateListener;
 127
 128         private @Nullable String state_topic;
 129         private @Nullable String command_topic;
 130         private boolean retain;
 131         private boolean trigger;
 132         private @Nullable Integer qos;
 133         private @Nullable Predicate<Command> commandFilter;
 134
 135         private @Nullable String templateIn;
 136         private @Nullable String templateOut;
 137
 138         public Builder(AbstractComponent<?> component, String channelID, Value valueState, String label,
 139                 ChannelStateUpdateListener channelStateUpdateListener) {
 140             this.component = component;
 141             this.channelID = channelID;
 142             this.valueState = valueState;
 143             this.label = label;
 144             this.channelStateUpdateListener = channelStateUpdateListener;
 145         }
 146
 147         public Builder stateTopic(@Nullable String state_topic) {
 148             this.state_topic = state_topic;
 149             return this;
 150         }
 151
 152         public Builder stateTopic(@Nullable String state_topic, @Nullable String... templates) {
 153             this.state_topic = state_topic;
 154             if (state_topic != null && !state_topic.isBlank()) {
 155                 for (String template : templates) {
 156                     if (template != null && !template.isBlank()) {
 157                         this.templateIn = template;
 158                         break;
 159                     }
 160                 }
 161             }
 162             return this;
 163         }
 164
 165         /**
 166          * @deprecated use commandTopic(String, boolean, int)
 167          * @param command_topic topic
 168          * @param retain retain
 169          * @return this
 170          */
 171         @Deprecated
 172         public Builder commandTopic(@Nullable String command_topic, boolean retain) {
 173             this.command_topic = command_topic;
 174             this.retain = retain;
 175             return this;
 176         }
 177
 178         public Builder commandTopic(@Nullable String command_topic, boolean retain, int qos) {
 179             return commandTopic(command_topic, retain, qos, null);
 180         }
 181
 182         public Builder commandTopic(@Nullable String command_topic, boolean retain, int qos,
 183                 @Nullable String template) {
 184             this.command_topic = command_topic;
 185             this.retain = retain;
 186             this.qos = qos;
 187             if (command_topic != null && !command_topic.isBlank()) {
 188                 this.templateOut = template;
 189             }
 190             return this;
 191         }
 192
 193         public Builder trigger(boolean trigger) {
 194             this.trigger = trigger;
 195             return this;
 196         }
 197
 198         public Builder commandFilter(@Nullable Predicate<Command> commandFilter) {
 199             this.commandFilter = commandFilter;
 200             return this;
 201         }
 202
 203         public ComponentChannel build() {
 204             return build(true);
 205         }
 206
 207         public ComponentChannel build(boolean addToComponent) {
 208             ChannelUID channelUID;
 209             ChannelState channelState;
 210             Channel channel;
 211             ChannelType type;
 212             ChannelTypeUID channelTypeUID;
 213
 214             channelUID = new ChannelUID(component.getGroupUID(), channelID);
 215             channelTypeUID = new ChannelTypeUID(MqttBindingConstants.BINDING_ID,
 216                     channelUID.getGroupId() + "_" + channelID);
 217             channelState = new HomeAssistantChannelState(
 218                     ChannelConfigBuilder.create().withRetain(retain).withQos(qos).withStateTopic(state_topic)
 219                             .withCommandTopic(command_topic).makeTrigger(trigger).build(),
 220                     channelUID, valueState, channelStateUpdateListener, commandFilter);
 221
 222             String localStateTopic = state_topic;
 223             if (localStateTopic == null || localStateTopic.isBlank() || this.trigger) {
 224                 type = ChannelTypeBuilder.trigger(channelTypeUID, label)
 225                         .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HA_CHANNEL)).build();
 226             } else {
 227                 StateDescriptionFragment description = valueState.createStateDescription(command_topic == null).build();
 228                 type = ChannelTypeBuilder.state(channelTypeUID, label, channelState.getItemType())
 229                         .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HA_CHANNEL))
 230                         .withStateDescriptionFragment(description).build();
 231             }
 232
 233             Configuration configuration = new Configuration();
 234             configuration.put("config", component.getChannelConfigurationJson());
 235             component.getHaID().toConfig(configuration);
 236
 237             channel = ChannelBuilder.create(channelUID, channelState.getItemType()).withType(channelTypeUID)
 238                     .withKind(type.getKind()).withLabel(label).withConfiguration(configuration).build();
 239
 240             ComponentChannel result = new ComponentChannel(channelUID, channelState, channel, type, channelTypeUID,
 241                     channelStateUpdateListener);
 242
 243             TransformationServiceProvider transformationProvider = component.getTransformationServiceProvider();
 244
 245             final String templateIn = this.templateIn;
 246             if (templateIn != null && transformationProvider != null) {
 247                 channelState
 248                         .addTransformation(new ChannelStateTransformation(JINJA, templateIn, transformationProvider));
 249             }
 250             final String templateOut = this.templateOut;
 251             if (templateOut != null && transformationProvider != null) {
 252                 channelState.addTransformationOut(
 253                         new ChannelStateTransformation(JINJA, templateOut, transformationProvider));
 254             }
 255             if (addToComponent) {
 256                 component.getChannelMap().put(channelID, result);
 257             }
 258             return result;
 259         }
 260     }
 261 }