Initial program flow page

2026-06-23 17:56:00 +09:00
commit 5df369100a
12 changed files with 3639 additions and 0 deletions
--- a/vite.config.js
+++ b/vite.config.js
@@ -0,0 +1,90 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+
+const databasePath = path.resolve(process.cwd(), 'data', 'flow-db.json');
+
+async function readDatabase() {
+  try {
+    const raw = await fs.readFile(databasePath, 'utf8');
+    return JSON.parse(raw);
+  } catch (error) {
+    if (error.code === 'ENOENT') return null;
+    throw error;
+  }
+}
+
+async function writeDatabase(data) {
+  await fs.mkdir(path.dirname(databasePath), { recursive: true });
+  await fs.writeFile(databasePath, JSON.stringify({
+    ...data,
+    updatedAt: new Date().toISOString()
+  }, null, 2));
+}
+
+function readRequestBody(request) {
+  return new Promise((resolve, reject) => {
+    let body = '';
+
+    request.on('data', (chunk) => {
+      body += chunk;
+      if (body.length > 5_000_000) {
+        reject(new Error('Request body is too large'));
+        request.destroy();
+      }
+    });
+
+    request.on('end', () => resolve(body));
+    request.on('error', reject);
+  });
+}
+
+function sendJson(response, statusCode, payload) {
+  response.statusCode = statusCode;
+  response.setHeader('Content-Type', 'application/json; charset=utf-8');
+  response.end(JSON.stringify(payload));
+}
+
+function serverDatabasePlugin() {
+  return {
+    name: 'flow-server-database',
+    configureServer(server) {
+      server.middlewares.use('/api/state', async (request, response) => {
+        try {
+          if (request.method === 'GET') {
+            const data = await readDatabase();
+            if (!data) {
+              sendJson(response, 404, { error: 'Database is empty' });
+              return;
+            }
+            sendJson(response, 200, data);
+            return;
+          }
+
+          if (request.method === 'PUT' || request.method === 'PATCH') {
+            const current = request.method === 'PATCH' ? (await readDatabase()) ?? {} : {};
+            const body = await readRequestBody(request);
+            const payload = body ? JSON.parse(body) : {};
+            const nextData = {
+              ...current,
+              ...payload
+            };
+            await writeDatabase(nextData);
+            sendJson(response, 200, nextData);
+            return;
+          }
+
+          response.statusCode = 405;
+          response.end();
+        } catch (error) {
+          sendJson(response, 500, { error: error.message });
+        }
+      });
+    }
+  };
+}
+
+export default defineConfig({
+  plugins: [react(), serverDatabasePlugin()]
+});