Codes are generated by openapi generator (#1296)

In the Messaging API, we've added a new endpoint that allows you to
[display a loading
animation](https://developers.line.biz/en/reference/messaging-api/#display-a-loading-indicator).
After your LINE Official Account receives a message from a user, the
response may takes some time due to message preparation or reservation
processing. In such cases, you can visually tell the user that you want
them to wait by displaying a loading animation.

news: https://developers.line.biz/en/news/2024/04/17/loading-indicator/

![loading-animation
7aad3d6c](https://github.com/line/line-openapi/assets/24933664/4435a2c1-db0c-409a-92f1-7c5fb64903c3)


line/line-openapi#54

Co-authored-by: github-actions <[email protected]>

Author: github-actions[bot]

clients/line-bot-messaging-api-client/.openapi-generator/FILES

@@ -131,6 +131,7 @@ src/main/java/com/linecorp/bot/messaging/model/RoomUserProfileResponse.java
 src/main/java/com/linecorp/bot/messaging/model/Sender.java
 src/main/java/com/linecorp/bot/messaging/model/SentMessage.java
 src/main/java/com/linecorp/bot/messaging/model/SetWebhookEndpointRequest.java
+src/main/java/com/linecorp/bot/messaging/model/ShowLoadingAnimationRequest.java
 src/main/java/com/linecorp/bot/messaging/model/StickerMessage.java
 src/main/java/com/linecorp/bot/messaging/model/SubscribedMembershipPlan.java
 src/main/java/com/linecorp/bot/messaging/model/SubscribedMembershipUser.java

clients/line-bot-messaging-api-client/src/main/java/com/linecorp/bot/messaging/client/MessagingApiClient.java

@@ -63,6 +63,7 @@
 import com.linecorp.bot.messaging.model.RoomMemberCountResponse;
 import com.linecorp.bot.messaging.model.RoomUserProfileResponse;
 import com.linecorp.bot.messaging.model.SetWebhookEndpointRequest;
+import com.linecorp.bot.messaging.model.ShowLoadingAnimationRequest;
 import com.linecorp.bot.messaging.model.TestWebhookEndpointRequest;
 import com.linecorp.bot.messaging.model.TestWebhookEndpointResponse;
 import com.linecorp.bot.messaging.model.UpdateRichMenuAliasRequest;
@@ -689,6 +690,18 @@ CompletableFuture<Result<ReplyMessageResponse>> replyMessage(
   CompletableFuture<Result<Void>> setWebhookEndpoint(
       @Body SetWebhookEndpointRequest setWebhookEndpointRequest);
 
+  /**
+   * Display a loading animation in one-on-one chats between users and LINE Official Accounts.
+   *
+   * @param showLoadingAnimationRequest (required)
+   * @see <a
+   *     href="https://developers.line.biz/en/reference/messaging-api/#display-a-loading-indicator">
+   *     Documentation</a>
+   */
+  @POST("/v2/bot/chat/loading/start")
+  CompletableFuture<Result<Object>> showLoadingAnimation(
+      @Body ShowLoadingAnimationRequest showLoadingAnimationRequest);
+
   /**
    * Test webhook endpoint
    *

clients/line-bot-messaging-api-client/src/main/java/com/linecorp/bot/messaging/model/ShowLoadingAnimationRequest.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2023 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.
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech Do not edit the class manually.
+ */
+package com.linecorp.bot.messaging.model;
+
+
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * ShowLoadingAnimationRequest
+ *
+ * @see <a
+ *     href="https://developers.line.biz/en/reference/messaging-api/#display-a-loading-indicator-request-body">
+ *     Documentation</a>
+ */
+@JsonInclude(Include.NON_NULL)
+@javax.annotation.Generated(value = "com.linecorp.bot.codegen.LineJavaCodegenGenerator")
+public record ShowLoadingAnimationRequest(
+    /** User ID of the target user for whom the loading animation is to be displayed. */
+    @JsonProperty("chatId") String chatId,
+    /**
+     * The number of seconds to display the loading indicator. It must be a multiple of 5. The
+     * maximum value is 60 seconds. minimum: 5 maximum: 60
+     */
+    @JsonProperty("loadingSeconds") Integer loadingSeconds) {
+
+  public static class Builder {
+    private String chatId;
+    private Integer loadingSeconds;
+
+    public Builder(String chatId) {
+
+      this.chatId = chatId;
+    }
+
+    public Builder loadingSeconds(Integer loadingSeconds) {
+      this.loadingSeconds = loadingSeconds;
+      return this;
+    }
+
+    public ShowLoadingAnimationRequest build() {
+      return new ShowLoadingAnimationRequest(chatId, loadingSeconds);
+    }
+  }
+}

clients/line-bot-messaging-api-client/src/test/java/com/linecorp/bot/messaging/client/MessagingApiClientTest.java

@@ -72,6 +72,7 @@
 import com.linecorp.bot.messaging.model.RoomMemberCountResponse;
 import com.linecorp.bot.messaging.model.RoomUserProfileResponse;
 import com.linecorp.bot.messaging.model.SetWebhookEndpointRequest;
+import com.linecorp.bot.messaging.model.ShowLoadingAnimationRequest;
 import com.linecorp.bot.messaging.model.TestWebhookEndpointRequest;
 import com.linecorp.bot.messaging.model.TestWebhookEndpointResponse;
 import com.linecorp.bot.messaging.model.TextMessage;
@@ -1568,6 +1569,34 @@ public void setWebhookEndpointTest() {
     // TODO: test validations
   }
 
+  @Test
+  public void showLoadingAnimationTest() {
+    stubFor(
+        post(urlPathTemplate("/v2/bot/chat/loading/start"))
+            .willReturn(
+                aResponse()
+                    .withStatus(200)
+                    .withHeader("content-type", "application/json")
+                    .withBody("{}")));
+
+    ShowLoadingAnimationRequest showLoadingAnimationRequest =
+        Arranger.some(
+            ShowLoadingAnimationRequest.class,
+            Map.of(
+                "message",
+                () -> new TextMessage("hello"),
+                "recipient",
+                () -> null,
+                "filter",
+                () -> null));
+
+    Object response = api.showLoadingAnimation(showLoadingAnimationRequest).join().body();
+
+    assertThat(response).isNotNull();
+
+    // TODO: test validations
+  }
+
   @Test
   public void testWebhookEndpointTest() {
     stubFor(