Support webhook redelivery #755 (#765)

* Support webhook redelivery #755

* follow checkstyle rules

Author: tokuhirom

line-bot-model/src/main/java/com/linecorp/bot/model/event/AccountLinkEvent.java

@@ -74,4 +74,14 @@ public static class AccountLinkEventBuilder {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/BeaconEvent.java

@@ -73,4 +73,14 @@ public static class BeaconEventBuilder {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/DeliveryContext.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2022 LINE Corporation
+ *
+ * LINE Corporation licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package com.linecorp.bot.model.event;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
+
+import lombok.Builder;
+import lombok.Value;
+
+@Value
+@Builder(toBuilder = true)
+@JsonDeserialize(builder = DeliveryContext.DeliveryContextBuilder.class)
+public class DeliveryContext {
+    @JsonPOJOBuilder(withPrefix = "")
+    public static class DeliveryContextBuilder {
+        // Providing builder instead of public constructor. Class body is filled by lombok.
+    }
+
+    /**
+     * Whether the webhook event is a redelivered one or not. The values of other properties such as
+     * webhookEventId and timestamp remain the same for redelivered webhook events.
+     */
+    Boolean isRedelivery;
+}

line-bot-model/src/main/java/com/linecorp/bot/model/event/Event.java

@@ -67,4 +67,14 @@ public interface Event {
      * </dl>
      */
     EventMode getMode();
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String getWebhookEventId();
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext getDeliveryContext();
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/FollowEvent.java

@@ -67,4 +67,14 @@ public static class FollowEventBuilder {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/JoinEvent.java

@@ -67,4 +67,14 @@ public static class JoinEventBuilder {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/LeaveEvent.java

@@ -62,4 +62,14 @@ public static class LeaveEventBuilder {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }

line-bot-model/src/main/java/com/linecorp/bot/model/event/MemberJoinedEvent.java

@@ -74,6 +74,16 @@ public static class MemberJoinedEventBuilder {
      */
     EventMode mode;
 
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
+
     @Value
     @Builder(toBuilder = true)
     @JsonDeserialize(builder = JoinedMembers.JoinedMembersBuilder.class)

line-bot-model/src/main/java/com/linecorp/bot/model/event/MemberLeftEvent.java

@@ -66,6 +66,16 @@ public static class MemberLeftEventBuilder {
      */
     EventMode mode;
 
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
+
     @Value
     @Builder(toBuilder = true)
     @JsonDeserialize(builder = LeftMembers.LeftMembersBuilder.class)

line-bot-model/src/main/java/com/linecorp/bot/model/event/MessageEvent.java

@@ -75,4 +75,14 @@ public static class MessageEventBuilder<T extends MessageContent> {
      * </dl>
      */
     EventMode mode;
+
+    /**
+     * Webhook Event ID. An ID that uniquely identifies a webhook event. This is a string in ULID format.
+     */
+    String webhookEventId;
+
+    /**
+     * Get delivery context.
+     */
+    DeliveryContext deliveryContext;
 }