[mqtt][homie] Implement non-retained and non-settable properties

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/values/OnOffValue.java

@@ -21,6 +21,8 @@
 import org.eclipse.smarthome.core.library.types.OnOffType;
 import org.eclipse.smarthome.core.library.types.StringType;
 import org.eclipse.smarthome.core.types.Command;
+import org.eclipse.smarthome.core.types.CommandDescriptionBuilder;
+import org.eclipse.smarthome.core.types.CommandOption;
 
 /**
  * Implements an on/off boolean value.
@@ -95,4 +97,12 @@ public String getMQTTpublishValue(@Nullable String pattern) {
 
         return String.format(formatPattern, state == OnOffType.ON ? onCommand : offCommand);
     }
+
+    @Override
+    public CommandDescriptionBuilder createCommandDescription() {
+        CommandDescriptionBuilder builder = super.createCommandDescription();
+        builder = builder.withCommandOption(new CommandOption(onCommand, onCommand));
+        builder = builder.withCommandOption(new CommandOption(offCommand, offCommand));
+        return builder;
+    }
 }

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/values/TextValue.java

@@ -23,6 +23,8 @@
 import org.eclipse.smarthome.core.library.CoreItemFactory;
 import org.eclipse.smarthome.core.library.types.StringType;
 import org.eclipse.smarthome.core.types.Command;
+import org.eclipse.smarthome.core.types.CommandDescriptionBuilder;
+import org.eclipse.smarthome.core.types.CommandOption;
 import org.eclipse.smarthome.core.types.StateDescriptionFragmentBuilder;
 import org.eclipse.smarthome.core.types.StateOption;
 
@@ -84,4 +86,16 @@ public StateDescriptionFragmentBuilder createStateDescription(boolean readOnly)
         }
         return builder;
     }
+
+    @Override
+    public CommandDescriptionBuilder createCommandDescription() {
+        CommandDescriptionBuilder builder = super.createCommandDescription();
+        final Set<String> commands = this.states;
+        if (states != null) {
+            for (String command : commands) {
+                builder = builder.withCommandOption(new CommandOption(command, command));
+            }
+        }
+        return builder;
+    }
 }

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/values/Value.java

@@ -24,6 +24,7 @@
 import org.eclipse.smarthome.core.library.types.PercentType;
 import org.eclipse.smarthome.core.library.types.RawType;
 import org.eclipse.smarthome.core.types.Command;
+import org.eclipse.smarthome.core.types.CommandDescriptionBuilder;
 import org.eclipse.smarthome.core.types.State;
 import org.eclipse.smarthome.core.types.StateDescriptionFragmentBuilder;
 import org.eclipse.smarthome.core.types.UnDefType;
@@ -169,4 +170,13 @@ public void update(byte data[]) throws IllegalArgumentException {
     public StateDescriptionFragmentBuilder createStateDescription(boolean readOnly) {
         return StateDescriptionFragmentBuilder.create().withReadOnly(readOnly).withPattern("%s");
     }
+
+    /**
+     * Return the command description builder for this value state.
+     *
+     * @return A command description builder
+     */
+    public CommandDescriptionBuilder createCommandDescription() {
+        return CommandDescriptionBuilder.create();
+    }
 }

bundles/org.openhab.binding.mqtt.homie/src/main/java/org/openhab/binding/mqtt/homie/internal/homie300/Property.java

@@ -29,6 +29,7 @@
 import org.eclipse.smarthome.core.thing.ChannelUID;
 import org.eclipse.smarthome.core.thing.DefaultSystemChannelTypeProvider;
 import org.eclipse.smarthome.core.thing.binding.builder.ChannelBuilder;
+import org.eclipse.smarthome.core.thing.type.AutoUpdatePolicy;
 import org.eclipse.smarthome.core.thing.type.ChannelType;
 import org.eclipse.smarthome.core.thing.type.ChannelTypeBuilder;
 import org.eclipse.smarthome.core.thing.type.ChannelTypeUID;
@@ -137,13 +138,22 @@ public void attributesReceived() {
      * @return Returns the ChannelType to be used to build the Channel.
      */
     private ChannelType createChannelType(PropertyAttributes attributes, ChannelState channelState) {
+        // Retained property -> State channel
         if (attributes.retained) {
             return ChannelTypeBuilder.state(channelTypeUID, attributes.name, channelState.getItemType())
                     .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HOMIE_CHANNEL))
                     .withStateDescription(channelState.getCache().createStateDescription(!attributes.settable).build()
                             .toStateDescription())
                     .build();
         } else {
+            // Non-retained and settable property -> State channel
+            if (attributes.settable) {
+                return ChannelTypeBuilder.state(channelTypeUID, attributes.name, channelState.getItemType())
+                        .withConfigDescriptionURI(URI.create(MqttBindingConstants.CONFIG_HOMIE_CHANNEL))
+                        .withCommandDescription(channelState.getCache().createCommandDescription().build())
+                        .withAutoUpdatePolicy(AutoUpdatePolicy.VETO).build();
+            }
+            // Non-retained and non settable property -> Trigger channel
             if (attributes.datatype.equals(DataTypeEnum.enum_)) {
                 if (attributes.format.contains("PRESSED") && attributes.format.contains("RELEASED")) {
                     return DefaultSystemChannelTypeProvider.SYSTEM_RAWBUTTON;