feat: add Hono HTTP server with REST API

src/api/routes.ts

@@ -0,0 +1,115 @@
+import { Hono } from 'hono';
+import { parseTemplate } from '../engine/parser';
+import { renderTemplate } from '../engine/render';
+import { extractSchema } from '../engine/schema';
+import { PrinterConnector } from '../printer/connector';
+import type { Template } from '../types/template';
+
+const templates = new Map<string, Template>();
+let printerConnector: PrinterConnector | null = null;
+
+function getPrinter(): PrinterConnector {
+  if (!printerConnector) {
+    const ip = process.env.PRINTER_IP || '192.168.1.100';
+    const port = parseInt(process.env.PRINTER_PORT || '9100');
+    printerConnector = new PrinterConnector({ ip, port });
+  }
+  return printerConnector;
+}
+
+const api = new Hono();
+
+// 模板管理
+api.get('/templates', (c) => {
+  const list = Array.from(templates.values()).map(t => ({
+    id: t.id,
+    name: t.name,
+    description: t.description,
+  }));
+  return c.json({ success: true, templates: list });
+});
+
+api.get('/templates/:id', (c) => {
+  const id = c.req.param('id');
+  const template = templates.get(id);
+  if (!template) {
+    return c.json({ success: false, error: { code: 'TEMPLATE_NOT_FOUND', message: `Template '${id}' not found` }}, 404);
+  }
+  return c.json({ success: true, template });
+});
+
+api.post('/templates', async (c) => {
+  const body = await c.req.json();
+  if (!body.id || !body.config) {
+    return c.json({ success: false, error: { code: 'INVALID_REQUEST', message: 'Missing id or config' }}, 400);
+  }
+  try {
+    const config = typeof body.config === 'string' ? parseTemplate(body.config) : body.config;
+    const template: Template = { ...config, id: body.id };
+    templates.set(body.id, template);
+    return c.json({ success: true, template: { id: template.id, name: template.name }}, 201);
+  } catch (error) {
+    return c.json({ success: false, error: { code: 'INVALID_TEMPLATE', message: String(error) }}, 400);
+  }
+});
+
+api.get('/templates/:id/schema', (c) => {
+  const id = c.req.param('id');
+  const template = templates.get(id);
+  if (!template) {
+    return c.json({ success: false, error: { code: 'TEMPLATE_NOT_FOUND', message: `Template '${id}' not found` }}, 404);
+  }
+  const { schema, example } = extractSchema(template);
+  return c.json({ success: true, templateId: id, schema, example });
+});
+
+// 打印
+api.post('/print/:templateId', async (c) => {
+  const templateId = c.req.param('templateId');
+  const template = templates.get(templateId);
+  if (!template) {
+    return c.json({ success: false, error: { code: 'TEMPLATE_NOT_FOUND', message: `Template '${templateId}' not found` }}, 404);
+  }
+  const body = await c.req.json();
+  const { data = {} } = body;
+  try {
+    const escData = renderTemplate(template, data);
+    const printer = getPrinter();
+    const jobId = printer.queue(escData);
+    return c.json({ success: true, jobId, status: 'queued', estimatedTime: '5s' });
+  } catch (error) {
+    return c.json({ success: false, error: { code: 'RENDER_ERROR', message: String(error) }}, 500);
+  }
+});
+
+// 打印机状态
+api.get('/printer/status', async (c) => {
+  const printer = getPrinter();
+  const status = await printer.getStatus();
+  return c.json({
+    success: true,
+    printer: {
+      ip: process.env.PRINTER_IP || '192.168.1.100',
+      port: parseInt(process.env.PRINTER_PORT || '9100'),
+      ...status,
+      queueLength: printer.getQueueLength()
+    }
+  });
+});
+
+api.post('/printer/test', (c) => {
+  const printer = getPrinter();
+  const testData = new Uint8Array([
+    0x1B, 0x40,
+    0x1B, 0x61, 0x01,
+    ...new TextEncoder().encode('Printer Test Page\n'),
+    ...new TextEncoder().encode('================\n'),
+    0x1B, 0x61, 0x00,
+    0x0A, 0x0A,
+    0x1D, 0x56, 0x00,
+  ]);
+  const jobId = printer.queue(testData);
+  return c.json({ success: true, jobId, message: 'Test page queued' });
+});
+
+export { api as apiRoutes };

src/server.ts

@@ -1 +1,23 @@
-console.log("Hello via Bun!");
+import { Hono } from 'hono';
+import { serveStatic } from 'hono/bun';
+import { apiRoutes } from './api/routes';
+
+const app = new Hono();
+
+// 静态文件服务（Web 界面）
+app.use('/*', serveStatic({ root: './src/static' }));
+
+// API 路由
+app.route('/api', apiRoutes);
+
+// 健康检查
+app.get('/health', (c) => c.json({ status: 'ok' }));
+
+const port = process.env.PORT || 3000;
+
+console.log(`🖨️  Receipt Printer Server starting on http://localhost:${port}`);
+
+export default {
+  port,
+  fetch: app.fetch,
+};