チャットフォームのクライアント側とサーバー側APIを連携

app/[docs_id]/chatForm.tsx

@@ -1,112 +1,160 @@
 "use client";
 
-import { hello } from "./chatServer";
+import { useState, FormEvent } from "react";
 
-export function ChatForm() {return (
+interface ChatApiResponse {
+  response: string;
+}
+
+export function ChatForm() {
+  const [inputValue, setInputValue] = useState("");
+  const [response, setResponse] = useState("");
+  const [isLoading, setIsLoading] = useState(false);
+
+  const handleSubmit = async (e: FormEvent<HTMLFormElement>) => {
+    e.preventDefault();
+    setIsLoading(true);
+    setResponse("");
+
+    try {
+      const res = await fetch("/api/chat", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ message: inputValue }),
+      });
+
+      const data = (await res.json()) as ChatApiResponse;
+      if (!res.ok) {
+        throw new Error(data.response || "エラーが発生しました。");
+      }
+      setResponse(data.response);
+    } catch (error: unknown) {
+      if (error instanceof Error) {
+        setResponse(`エラー: ${error.message}`);
+      } else {
+        setResponse(`エラー: ${String(error)}`);
+      }
+    } finally {
+      setIsLoading(false);
+    }
+  };
+  return (
     <>
-    <style jsx>{`
+      <style jsx>{`
         /* 簡単なCSSで見た目を整える（オプション） */
         .form-container {
-            background-color: white;
-            border-radius: 10px;
-            box-shadow: 0 4px 8px rgba(67, 204, 216, 0.86);
-            padding: 20px;
-            width: 90%;
-            max-width: 1000px;
-            display: flex;
-            flex-direction: column;
+          background-color: white;
+          border-radius: 10px;
+          box-shadow: 0 4px 8px rgba(67, 204, 216, 0.86);
+          padding: 20px;
+          width: 90%;
+          max-width: 1000px;
+          display: flex;
+          flex-direction: column;
         }
         .input-area {
-            border: 1px solid #ccc;
-            border-radius: 8px;
-            padding: 5px 15 px;
-            margin-bottom: 15px;
-            min-height: 150px; /* 入力欄の高さ */
-            display: flex;
+          border: 1px solid #ccc;
+          border-radius: 8px;
+          padding: 5px 15 px;
+          margin-bottom: 15px;
+          min-height: 150px; /* 入力欄の高さ */
+          display: flex;
         }
         .text-input {
-            border: none;
-            outline: none;
-            flex-grow: 1;
-            font-size: 16px;
-            resize: none; /* テキストエリアのリサイズを無効化 */
-            overflow: auto;
-            padding: 10px;
+          border: none;
+          outline: none;
+          flex-grow: 1;
+          font-size: 16px;
+          resize: none; /* テキストエリアのリサイズを無効化 */
+          overflow: auto;
+          padding: 10px;
         }
         .controls {
-            display: flex;
-            align-items: center;
-            justify-content: space-between;
+          display: flex;
+          align-items: center;
+          justify-content: space-between;
         }
         .left-icons button {
-            background: none;
-            border: none;
-            font-size: 24px;
-            cursor: pointer;
-            color: #555;
-            margin-right: 15px;
-            padding: 5px;
+          background: none;
+          border: none;
+          font-size: 24px;
+          cursor: pointer;
+          color: #555;
+          margin-right: 15px;
+          padding: 5px;
         }
         .left-icons button:hover {
-            color: #000;
+          color: #000;
         }
         .left-icons span {
-            font-size: 14px;
-            vertical-align: middle;
-            margin-left: 5px;
-            color: #555;
+          font-size: 14px;
+          vertical-align: middle;
+          margin-left: 5px;
+          color: #555;
         }
         .right-controls {
-            display: flex;
-            align-items: center;
+          display: flex;
+          align-items: center;
         }
         .voice-icon button {
-            background: none;
-            border: none;
-            font-size: 24px;
-            cursor: pointer;
-            color: #555;
-            margin-right: 15px;
-            padding: 5px;
+          background: none;
+          border: none;
+          font-size: 24px;
+          cursor: pointer;
+          color: #555;
+          margin-right: 15px;
+          padding: 5px;
         }
         .voice-icon button:hover {
-            color: #000;
+          color: #000;
         }
         .send-button {
-            background-color: #007bff; /* 青色の送信ボタン */
-            color: white;
-            border: none;
-            border-radius: 50%; /* 丸いボタン */
-            width: 40px;
-            height: 40px;
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            font-size: 20px;
-            cursor: pointer;
-            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
-            transition: background-color 0.3s ease;
+          background-color: #007bff; /* 青色の送信ボタン */
+          color: white;
+          border: none;
+          border-radius: 50%; /* 丸いボタン */
+          width: 40px;
+          height: 40px;
+          display: flex;
+          justify-content: center;
+          align-items: center;
+          font-size: 20px;
+          cursor: pointer;
+          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+          transition: background-color 0.3s ease;
         }
         .send-button:hover {
-            background-color: #0056b3;
+          background-color: #0056b3;
         }
-    `}</style>
+      `}</style>
 
-    <div className="form-container">
+      <form className="form-container" onSubmit={handleSubmit}>
         <div className="input-area">
-            <textarea className="text-input" placeholder="質問を入力してください"></textarea>
+          <textarea
+            className="text-input"
+            placeholder="質問を入力してください"
+            value={inputValue}
+            onChange={(e) => setInputValue(e.target.value)}
+            disabled={isLoading}
+          ></textarea>
         </div>
-
         <div className="controls">
-            <div className="left-icons">
-
-            </div>
-            <div className="right-controls">
-                <button type="submit" className="send-button" title="送信">
-                    <span className="icon">➤</span>
-                </button>
-            </div>
+          <div className="left-icons"></div>
+          <div className="right-controls">
+            <button
+              type="submit"
+              className="send-button"
+              title="送信"
+              disabled={isLoading}
+            >
+              <span className="icon">➤</span>
+            </button>
+          </div>
         </div>
-    </div>
+      </form>
+      {response && <div className="response-container">{response}</div>}
     </>
-)}
+  );
+}

app/chat/route.js → app/api/chat/route.js

@@ -1,13 +1,11 @@
-import { NextResponse } from 'next/server';
-import { GoogleGenerativeAI } from '@google/generative-ai';
-
+import { NextResponse } from "next/server";
+import { GoogleGenerativeAI } from "@google/generative-ai";
 
 const genAI = new GoogleGenerativeAI(process.env.API_KEY);
 
 export async function POST(request) {
   const { message } = await request.json();
 
-
   if (!message) {
     return NextResponse.json(
       { error: "メッセージがありません。" },
@@ -17,19 +15,17 @@ export async function POST(request) {
 
   try {
     const model = genAI.getGenerativeModel({ model: "gemini-1.5-flash" });
-    
+
     const result = await model.generateContent(message);
     const response = result.response;
     const text = response.text();
 
     return NextResponse.json({ response: text });
-
   } catch (e) {
-
     console.error("Error:", e);
     return NextResponse.json(
       { response: "エラーが発生しました。" },
       { status: 500 }
     );
   }
-}
+}