Hello Typescript!

hydro/check.ts

@@ -0,0 +1,68 @@
+// TODO check more
+
+import os from 'os';
+import superagent from 'superagent';
+import * as system from './model/system';
+import * as db from './service/db';
+
+const c = {};
+
+async function checkDb(log, warn, error) {
+    try {
+        const coll = db.collection('check');
+        const d = await coll.findOne({ _id: 'check' });
+        if (!d) await coll.insertOne({ _id: 'check', value: 'check' });
+        await coll.createIndex('check');
+        await coll.deleteOne({ _id: 'check' });
+        await coll.drop();
+    } catch (e) {
+        error(`Mongo Error: Database read-write failed.\n${e.message}`);
+    }
+}
+
+async function checkPerm(log, warn) {
+    const { username } = os.userInfo();
+    if (username === 'root') warn('Hydro should not be run as root.');
+    // TODO check cwd read-write
+}
+
+async function checkMail(log, warn) {
+    const from = await system.get('smtp.from');
+    if (!from) warn('SMTP account was not provided, email verification disabled.');
+}
+
+async function checkProxy(log, warn) {
+    const [github, google, proxy] = await system.getMany([
+        'oauth.githubappid', 'oauth.googleappid', 'proxy',
+    ]);
+    if (proxy) {
+        superagent.get('https://www.google.com/').timeout(10000).proxy(proxy)
+            .catch(() => warn('The proxy configured seem to be invalid.'));
+    } else if (github || google) {
+        warn('OAuth enabled. But for well-known reasons, a proxy is required.');
+    }
+}
+
+const checks = [
+    checkDb,
+    checkPerm,
+    checkMail,
+    checkProxy,
+];
+
+export async function start(log, warn, error, cb) {
+    const id = String.random(6);
+    cb(id);
+    for (const check of checks) {
+        if (c[id]) {
+            delete c[id];
+            return;
+        }
+        // eslint-disable-next-line no-await-in-loop
+        await check(log, warn, error);
+    }
+}
+
+export async function cancel(id) {
+    c[id] = true;
+}