Initial import of zappier-sales-pricing from zapier monorepo

src/nats-billing.js

@@ -0,0 +1,17 @@
+export const SUBJECTS = { STATEMENT_GET: 'verae.billing.statement.get' };
+
+export async function billingRequest(subject, payload) {
+  const url = process.env.NATS_URL;
+  if (!url) return null;
+  try {
+    const { connect, StringCodec } = await import('nats');
+    const nc = await connect({ servers: url.split(','), name: 'zappier-sales-pricing' });
+    const sc = StringCodec();
+    const m = await nc.request(subject, sc.encode(JSON.stringify(payload)), { timeout: 2000 });
+    const out = JSON.parse(sc.decode(m.data) || '{}');
+    await nc.close();
+    return out;
+  } catch {
+    return null;
+  }
+}

src/server.js

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+#!/usr/bin/env node
+/** Sales department: per-customer multiplier / tier. Writes through zappier-edge. */
+import fs from 'node:fs';
+import http from 'node:http';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import { SUBJECTS, billingRequest } from './nats-billing.js';
+
+const PUBLIC = path.join(path.dirname(fileURLToPath(import.meta.url)), '..', 'public');
+
+const PORT = Number(process.env.PORT || 3012);
+const EDGE = (process.env.ZAPPIER_ADMIN_URL || 'http://127.0.0.1:3000').replace(/\/$/, '');
+const KEY = process.env.ZAPPIER_ADMIN_KEY || 'admin-dev-key';
+const BOOKS = (process.env.ACCOUNT_BALANCE_URL || 'http://127.0.0.1:3010').replace(/\/$/, '');
+
+async function edge(pathname, { method = 'GET', body } = {}) {
+  const r = await fetch(`${EDGE}${pathname}`, {
+    method,
+    headers: { 'content-type': 'application/json', 'x-admin-key': KEY },
+    body: body ? JSON.stringify(body) : undefined,
+  });
+  const text = await r.text();
+  try {
+    return { status: r.status, body: JSON.parse(text) };
+  } catch {
+    return { status: r.status, body: text };
+  }
+}
+
+const server = http.createServer(async (req, res) => {
+  const url = new URL(req.url || '/', `http://127.0.0.1:${PORT}`);
+  const json = (code, obj) => {
+    res.writeHead(code, { 'content-type': 'application/json' });
+    res.end(JSON.stringify(obj));
+  };
+  try {
+    if (req.method === 'GET' && (url.pathname === '/' || url.pathname === '/index.html')) {
+      res.writeHead(200, { 'content-type': 'text/html; charset=utf-8' });
+      res.end(fs.readFileSync(path.join(PUBLIC, 'index.html')));
+      return;
+    }
+    if (req.method === 'GET' && url.pathname === '/health') {
+      return json(200, { ok: true, role: 'zappier-sales-pricing' });
+    }
+    const review = url.pathname.match(/^\/review\/([^/]+)$/);
+    if (req.method === 'GET' && review) {
+      const nats = await billingRequest(SUBJECTS.STATEMENT_GET, { customerId: review[1] });
+      if (nats) return json(200, { ...nats, source: 'nats' });
+      const r = await fetch(`${BOOKS}/statement/${review[1]}`);
+      if (r.ok) return json(200, { ...(await r.json()), source: 'account-balance' });
+      const e = await edge(`/admin/api/statement/${review[1]}`);
+      return json(e.status, e.body);
+    }
+    const quote = url.pathname.match(/^\/quotes\/([^/]+)$/);
+    if (req.method === 'GET' && quote) {
+      const forwarded = await edge(`/admin/api/sales/quote/${quote[1]}`);
+      return json(forwarded.status, forwarded.body);
+    }
+    const price = url.pathname.match(/^\/customers\/([^/]+)\/pricing$/);
+    if (req.method === 'PUT' && price) {
+      const chunks = [];
+      for await (const c of req) chunks.push(c);
+      const payload = JSON.parse(Buffer.concat(chunks).toString('utf8') || '{}');
+      const forwarded = await edge(`/admin/api/customers/${price[1]}`, { method: 'PUT', body: payload });
+      return json(forwarded.status, forwarded.body);
+    }
+    json(404, { error: 'not found' });
+  } catch (err) {
+    json(502, { error: err.message });
+  }
+});
+
+server.listen(PORT, '0.0.0.0', () => {
+  process.stdout.write(`zappier-sales-pricing http://127.0.0.1:${PORT}/\n`);
+});