Add optional message field to /submit for iOS review intercept

- /submit now requires email OR message (email-only calls unchanged)
- message trimmed + capped at 10k chars; stored via guarded ALTER TABLE migration
- /export CSV gains message column with proper quoting/escaping
- test suite (node --test): 9 tests covering compat, validation, truncation, CSV escaping

Ticket: T2 of review-flow-10x epic (chatai-ios#136)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014WPnLnXS4YRz9vVt1BEdeR

README.md

@@ -31,12 +31,15 @@ POST /submit
 Content-Type: application/json
 
 {
-  "email": "user@example.com",
+  "email": "user@example.com",  # optional if message present
   "form_name": "newsletter",    # optional, default: "default"
-  "source": "homepage"        # optional
+  "source": "homepage",         # optional
+  "message": "free-text..."     # optional, max 10k chars; required if email absent
 }
 ```
 
+Either `email` or `message` is required. Message-only submissions (e.g. `form_name: "review_intercept"` from the iOS negative-review intercept) store an empty email.
+
 ### List Submissions (protected)
 ```bash
 GET /emails?form_name=newsletter&limit=100&offset=0

index.js

@@ -54,6 +54,15 @@ async function initDb() {
   db.run(`CREATE INDEX IF NOT EXISTS idx_form_name ON submissions(form_name)`);
   db.run(`CREATE INDEX IF NOT EXISTS idx_email ON submissions(email)`);
 
+  // Migration: add message column for free-text submissions (e.g. review intercept)
+  const columns = [];
+  const pragma = db.prepare(`PRAGMA table_info(submissions)`);
+  while (pragma.step()) columns.push(pragma.getAsObject().name);
+  pragma.free();
+  if (!columns.includes('message')) {
+    db.run(`ALTER TABLE submissions ADD COLUMN message TEXT`);
+  }
+
   saveDb();
 
   // Auto-save every 30 seconds
@@ -84,22 +93,30 @@ app.get('/health', (req, res) => {
 app.post('/submit', (req, res) => {
   try {
     const { email, form_name = 'default', source = null } = req.body;
+    let { message = null } = req.body;
 
-    if (!email) {
+    if (message != null) {
-      return res.status(400).json({ error: 'Email is required' });
+      message = String(message).trim().slice(0, 10000) || null;
     }
 
+    // Either a valid email or a free-text message is required
+    if (!email && !message) {
+      return res.status(400).json({ error: 'Email or message is required' });
+    }
+
+    if (email) {
       const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
       if (!emailRegex.test(email)) {
         return res.status(400).json({ error: 'Invalid email format' });
       }
+    }
 
     const ip = req.headers['x-forwarded-for'] || req.socket.remoteAddress;
     const userAgent = req.headers['user-agent'] || null;
 
     db.run(
-      `INSERT INTO submissions (form_name, email, source, ip, user_agent, created_at) VALUES (?, ?, ?, ?, ?, datetime('now'))`,
+      `INSERT INTO submissions (form_name, email, source, ip, user_agent, message, created_at) VALUES (?, ?, ?, ?, ?, ?, datetime('now'))`,
-      [form_name, email.toLowerCase().trim(), source, ip, userAgent]
+      [form_name, email ? email.toLowerCase().trim() : '', source, ip, userAgent, message]
     );
 
     saveDb();
@@ -166,7 +183,7 @@ app.get('/export', requireAuth, (req, res) => {
   try {
     const { form_name } = req.query;
 
-    let query = 'SELECT email, form_name, source, created_at FROM submissions';
+    let query = 'SELECT email, form_name, source, message, created_at FROM submissions';
     if (form_name) query += ' WHERE form_name = ?';
     query += ' ORDER BY created_at DESC';
 
@@ -179,9 +196,15 @@ app.get('/export', requireAuth, (req, res) => {
     }
     stmt.free();
 
+    // Quote fields that may contain commas, quotes, or newlines
+    const csvEscape = (v) => {
+      const s = v == null ? '' : String(v);
+      return /[",\n\r]/.test(s) ? `"${s.replace(/"/g, '""')}"` : s;
+    };
+
     const csv = [
-      'email,form_name,source,created_at',
+      'email,form_name,source,message,created_at',
-      ...rows.map(s => `${s.email},${s.form_name},${s.source || ''},${s.created_at}`)
+      ...rows.map(s => [s.email, s.form_name, s.source, s.message, s.created_at].map(csvEscape).join(','))
     ].join('\n');
 
     res.setHeader('Content-Type', 'text/csv');

package-lock.json

@@ -0,0 +1,865 @@
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+      "license": "MIT",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
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+      "license": "MIT"
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+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6"
+      }
+    },
+    "node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "license": "MIT",
+      "dependencies": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    }
+  }
+}

package.json

@@ -4,7 +4,8 @@
   "description": "Lightweight form capture microservice",
   "main": "index.js",
   "scripts": {
-    "start": "node index.js"
+    "start": "node index.js",
+    "test": "node --test"
   },
   "dependencies": {
     "sql.js": "^1.11.0",

test/submit.test.js

@@ -0,0 +1,127 @@
+const { test, before, after } = require('node:test');
+const assert = require('node:assert');
+const { spawn } = require('node:child_process');
+const fs = require('node:fs');
+const os = require('node:os');
+const path = require('node:path');
+
+const PORT = 3999;
+const BASE = `http://127.0.0.1:${PORT}`;
+const API_KEY = 'test-key';
+let server;
+let dataDir;
+
+before(async () => {
+  dataDir = fs.mkdtempSync(path.join(os.tmpdir(), 'form-capture-test-'));
+  server = spawn('node', [path.join(__dirname, '..', 'index.js')], {
+    env: { ...process.env, PORT: String(PORT), DATA_DIR: dataDir, API_KEY },
+    stdio: 'ignore',
+  });
+  // Wait for the server to come up
+  for (let i = 0; i < 50; i++) {
+    try {
+      const res = await fetch(`${BASE}/health`);
+      if (res.ok) return;
+    } catch {}
+    await new Promise(r => setTimeout(r, 100));
+  }
+  throw new Error('server did not start');
+});
+
+after(() => {
+  server.kill();
+  fs.rmSync(dataDir, { recursive: true, force: true });
+});
+
+test('email-only submission still works (backward compat)', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email: 'a@b.com', form_name: 'newsletter' }),
+  });
+  assert.strictEqual(res.status, 200);
+  assert.strictEqual((await res.json()).success, true);
+});
+
+test('message-only submission works (review intercept)', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ message: 'The app crashed, twice', form_name: 'review_intercept', source: 'ios' }),
+  });
+  assert.strictEqual(res.status, 200);
+});
+
+test('message + reply email submission works', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email: 'reply@me.com', message: 'line1\nline2, "quoted"', form_name: 'review_intercept' }),
+  });
+  assert.strictEqual(res.status, 200);
+});
+
+test('empty body is rejected', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ form_name: 'review_intercept' }),
+  });
+  assert.strictEqual(res.status, 400);
+  assert.match((await res.json()).error, /Email or message/);
+});
+
+test('whitespace-only message is rejected', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ message: '   ' }),
+  });
+  assert.strictEqual(res.status, 400);
+});
+
+test('invalid email is still rejected even with message', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email: 'not-an-email', message: 'hello' }),
+  });
+  assert.strictEqual(res.status, 400);
+});
+
+test('message longer than 10k chars is truncated, not rejected', async () => {
+  const res = await fetch(`${BASE}/submit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ message: 'x'.repeat(20000), form_name: 'review_intercept' }),
+  });
+  assert.strictEqual(res.status, 200);
+  const list = await (await fetch(`${BASE}/emails?form_name=review_intercept&limit=100`, {
+    headers: { Authorization: `Bearer ${API_KEY}` },
+  })).json();
+  const long = list.submissions.find(s => s.message && s.message.startsWith('xxx'));
+  assert.ok(long, 'truncated submission should be listed');
+  assert.strictEqual(long.message.length, 10000);
+});
+
+test('/emails returns message field', async () => {
+  const res = await fetch(`${BASE}/emails?form_name=review_intercept`, {
+    headers: { Authorization: `Bearer ${API_KEY}` },
+  });
+  assert.strictEqual(res.status, 200);
+  const body = await res.json();
+  const withMsg = body.submissions.find(s => s.message === 'The app crashed, twice');
+  assert.ok(withMsg, 'message should round-trip through /emails');
+  assert.strictEqual(withMsg.email, '');
+});
+
+test('/export CSV includes and escapes message', async () => {
+  const res = await fetch(`${BASE}/export?form_name=review_intercept`, {
+    headers: { Authorization: `Bearer ${API_KEY}` },
+  });
+  assert.strictEqual(res.status, 200);
+  const csv = await res.text();
+  assert.match(csv.split('\n')[0], /^email,form_name,source,message,created_at$/);
+  // Multi-line + quoted message must be wrapped and quote-doubled
+  assert.ok(csv.includes('"line1\nline2, ""quoted"""'), 'CSV should escape newlines, commas, quotes');
+});