Add support for MQTT Event

src/ToMqttNet/DeviceTypes/MqttButtonDiscoveryConfig.cs

@@ -2,10 +2,10 @@
 
 namespace ToMqttNet
 {
-	/// <summary>
-	/// The mqtt button platform lets you send an MQTT message when the button is pressed in the frontend or the button press service is called. This can be used to expose some service of a remote device, for example reboot.
-	/// </summary>
-	public class MqttButtonDiscoveryConfig : MqttDiscoveryConfig
+    /// <summary>
+    /// The mqtt button platform lets you send an MQTT message when the button is pressed in the frontend or the button press service is called. This can be used to expose some service of a remote device, for example reboot.
+    /// </summary>
+    public class MqttButtonDiscoveryConfig : MqttDiscoveryConfig
 	{
 		public override string Component => "button";
 

src/ToMqttNet/DeviceTypes/MqttEventDiscoveryConfig.cs

@@ -0,0 +1,96 @@
+using Newtonsoft.Json;
+
+namespace ToMqttNet
+{
+    public class MqttEventDiscoveryConfig : MqttDiscoveryConfig
+    {
+        public override string Component => "event";
+
+        ///<summary>
+        /// The type/class of the event to set the icon in the frontend. The device_class can be null.
+        /// , default: None
+        ///</summary> 
+        [JsonProperty("device_class")]
+        public HomeAssistantDeviceClass? DeviceClass { get; set; }
+
+        ///<summary>
+        /// Flag which defines if the entity should be enabled when first added.
+        /// , default: true
+        ///</summary> 
+        [JsonProperty("enabled_by_default")]
+        public bool? EnabledByDefault { get; set; }
+
+        ///<summary>
+        /// The encoding of the published messages.
+        /// , default: utf-8
+        ///</summary> 
+        [JsonProperty("encoding")]
+        public string? Encoding { get; set; }
+
+        ///<summary>
+        /// The category of the entity.
+        /// , default: None
+        ///</summary> 
+        [JsonProperty("entity_category")]
+        public string? EntityCategory { get; set; }
+
+        ///<summary>
+        /// A list of valid event_type strings.
+        ///</summary> 
+        [JsonProperty("event_types")]
+        public List<string> EventTypes { get; set; }
+
+
+        ///<summary>
+        /// Defines a template to extract the JSON dictionary from messages received on the json_attributes_topic. Usage example can be found in MQTT sensor documentation.
+        ///</summary> 
+        [JsonProperty("json_attributes_template")]
+        public string? JsonAttributesTemplate { get; set; }
+
+        ///<summary>
+        /// The MQTT topic subscribed to receive a JSON dictionary payload and then set as sensor attributes. Usage example can be found in MQTT sensor documentation.
+        ///</summary> 
+        [JsonProperty("json_attributes_topic")]
+        public string? JsonAttributesTopic { get; set; }
+
+        ///<summary>
+        /// Used instead of name for automatic generation of entity_id
+        ///</summary> 
+        [JsonProperty("object_id")]
+        public string? ObjectId { get; set; }
+
+        ///<summary>
+        /// The payload that represents the available state.
+        /// , default: online
+        ///</summary> 
+        [JsonProperty("payload_available")]
+        public string? PayloadAvailable { get; set; }
+
+        ///<summary>
+        /// The payload that represents the unavailable state.
+        /// , default: offline
+        ///</summary> 
+        [JsonProperty("payload_not_available")]
+        public string? PayloadNotAvailable { get; set; }
+
+        ///<summary>
+        /// The maximum QoS level to be used when receiving and publishing messages.
+        /// , default: 0
+        ///</summary> 
+        [JsonProperty("qos")]
+        public long? Qos { get; set; }
+
+        ///<summary>
+        /// The MQTT topic subscribed to receive JSON event payloads. The JSON payload should contain the event_type element. The event type should be one of the configured event_types.
+        /// , default: None
+        ///</summary> 
+        [JsonProperty("state_topic")]
+        public string StateTopic { get; set; }
+
+        ///<summary>
+        /// Defines a template to extract the value and render it to a valid JSON event payload. If the template throws an error, the current state will be used instead.
+        ///</summary> 
+        [JsonProperty("value_template")]
+        public string? ValueTemplate { get; set; }
+    }
+}