Added small server app to serve keys and create session with Defined …

…README.md (#16)

* Added small server app to serve keys and create session with Defined README.md

* Formatted LICENSE

* Fixed Readme

* Removed server/.gitignore

server/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+firebase-debug.log*
+firebase-debug.*.log*
+
+# Firebase cache
+.firebase/
+
+# Firebase config
+
+# Uncomment this if you'd like others to create their own Firebase project.
+# For a team working on the same Firebase project(s), it is recommended to leave
+# it commented so all members can deploy to the same project(s) in .firebaserc.
+# .firebaserc
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# dataconnect generated files
+.dataconnect
+
+# Don't push firebase related things
+.firebaserc
+firebase.json
+/functions/node_modules/
+/functions/*.local
+/functions/package.json
+/functions/package-lock.json

server/LICENSE

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+MIT License
+
+Copyright (c) 2024 Degica
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

server/README.md

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+## Description / 説明
+
+This is a lightweight server application designed to function as a backend for the demo app.
+
+デモアプリのバックエンドとして機能する軽量なサーバーアプリです。
+
+### Setup / 設定
+
+<details>
+  <summary>English / 英語</summary>
+
+* Ensure you have an existing Firebase project in your Firebase console, or create a new one.
+* Enable Cloud Functions.
+* Install Firebase CLI tools using the command `npm install -g firebase-tools`.
+* Log in to Firebase CLI with `firebase login`.
+* After successful login, initialize Firebase in the server directory using `firebase init`.
+* Choose ` ◉ Functions: Configure a Cloud Functions directory and its files` and press enter.
+* Select `Use an existing project`.
+* Choose the project created in step 1.
+* Choose `JavaScript`.
+* Respond **No** to ` Do you want to use ESLint to catch probable bugs and enforce style?`.
+* Respond **No** to `File functions/index.js already exists. Overwrite?` (ensure this is correct).
+* Respond **Yes** to `Do you want to install dependencies with npm now?`.
+* Configure the `.env` file according to the `.env.sample`.
+* Run `firebase deploy` to build and deploy the server to Firebase Cloud Functions.
+* Wait for the process to complete, and your server should be up and running.
+
+</details>
+
+
+<details>
+  <summary>Japanese / 日本語</summary>
+
+* FirebaseコンソールにFirebaseプロジェクトを作成するか、既存のプロジェクトを確認してください。
+* Cloud Functionsを有効にします。
+* Firebase CLIツールをインストールします: `npm install -g firebase-tools`.
+* `firebase login` を使ってFirebase CLIにログインします。
+* ログインが成功したら、サーバーディレクトリで `firebase init` を実行してFirebaseを初期化します。
+* ` ◉ Functions: Configure a Cloud Functions directory and its files` を選択してEnterを押します。
+* `既存のプロジェクトを使用`を選択します。
+* ステップ1で作成したプロジェクトを選択します。
+* `JavaScript` を選択します。
+* ` Do you want to use ESLint to catch probable bugs and enforce style?` に対して**いいえ**と回答します。
+* `File functions/index.js already exists. Overwrite?` に対して**いいえ**と回答します（必ず確認してください）。
+* `Do you want to install dependencies with npm now?` に対して**はい**と回答します。
+* `.env.sample`に基づいて `.env` ファイルを設定します。
+* `firebase deploy` を実行して、サーバーをFirebase Cloud Functionsにデプロイします。
+* デプロイが完了するまで待ち、サーバーが稼働していることを確認します。
+
+</details>
+
+### Support / サポート
+If you encounter any issues, please open an issue.
+
+何か問題が発生した場合は、問題を報告してください。

server/functions/.env.sample

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+PUBLISHABLE_KEY=<YOUR_PUBLISHABLE_KEY_FROM_KOMOJU_DASHBOARD>
+SECRET_KEY=<YOUR_SECRET_KEY_FROM_KOMOJU_DASHBOARD>
+RETURN_URL=<YOUR_REDIRECT_URL>

server/functions/index.js

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+const httpsOptions = {
+    region: "asia-northeast1" // Tokyo
+    // region: "asia-northeast2" // Osaka
+};
+
+const { onRequest } = require("firebase-functions/v2/https");
+const express = require('express');
+const app = express();
+
+app.get('/:serve-key', (req, res) => res.send({
+    publishableKey: process.env.PUBLISHABLE_KEY
+}));
+
+app.post("/:create-session", async (req, res) => {
+    const {
+        amount,
+        currency,
+        language
+    } = req.body;
+    const secretKey = process.env.SECRET_KEY;
+
+    try {
+        const sessionId = await createSession({
+            amount,
+            currency,
+            language,
+            secretKey,
+        });
+        res.send({
+            sessionId
+        });
+        console.log(sessionId)
+    } catch (error) {
+        res.status(500);
+        res.send({
+            error: error.message
+        })
+    }
+});
+
+async function createSession({
+    amount,
+    currency,
+    language,
+    secretKey
+}) {
+    if (!secretKey) {
+        throw new Error("Secret Key Required");
+    }
+
+    const url = "https://komoju.com/api/v1/sessions";
+    const options = {
+        method: "POST",
+        headers: {
+            accept: "application/json",
+            "content-type": "application/json",
+            Authorization: `Basic ${Buffer.from(secretKey + ":").toString("base64")}`,
+            "X-KOMOJU-API-VERSION": "2024-07-15",
+        },
+        body: JSON.stringify({
+            default_locale: language ?? "ja",
+            amount,
+            currency,
+            return_url: process.env.RETURN_URL,
+        }),
+    };
+    const response = await fetch(url, options);
+    if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`);
+    }
+    const {
+        id
+    } = await response.json();
+    return id;
+}
+exports.komoju = onRequest(httpsOptions, app);