feat: add self checking

src/actions/initialChecks.ts

@@ -0,0 +1,52 @@
+import fs from "fs";
+
+const requiredEnvVars = ['MIGRATE_TXT', 'DB_FILE_NAME', 'MAILCONNECT_ROOT_DIR'];
+
+function checkRatelimit() {
+  const ratelimitExists = fs.existsSync("ratelimit.json");
+  if (!ratelimitExists) {
+    console.log("[!] Ratelimit config not found");
+    return false;
+  } else {
+    console.log("[✓] Found ratelimit config");
+    return true;
+  };
+};
+
+function checkEnv() {
+  const envExists = fs.existsSync(".env");
+  if (!envExists) {
+    console.log("[!] .env file not found");
+    return false;
+  } else {
+    console.log("[✓] Found .env file");
+    let allVarsPresent = true;
+
+    for (const envVar of requiredEnvVars) {
+      if (!process.env[envVar]) {
+        console.log(`    [!] ${envVar} not found`);
+        allVarsPresent = false;
+      } else {
+        console.log(`    [✓] Found ${envVar}`);
+      }
+    }
+
+    if (!allVarsPresent) {
+      return false;
+    } else {
+      return true;
+    }
+  };
+};
+
+// the return value of this function determines if server should exit early
+export default function initialChecks() {
+  const ratelimitCheck = checkRatelimit();
+  const envCheck = checkEnv();
+
+  if (!ratelimitCheck || !envCheck) {
+    return false;
+  } else {
+    return true;
+  }
+};

src/server.ts

@@ -5,10 +5,20 @@ import { listAccounts } from "./actions/accounts/listAccounts";
 import { getUserAccount } from "./actions/accounts/getUserAccount";
 import { updatePassword } from "./actions/accounts/updatePassword";
 import { addAccount } from "./actions/accounts/addAccount";
+import initialChecks from "./actions/initialChecks";
 
 const app = express();
 app.use(express.json());
 
+console.log("==== SELF CHECK STARTING ====\n");
+const rCResult = initialChecks();
+if (!rCResult) {
+  console.log("\n====   SELF CHECK FAIL   ====");
+  process.exit(1);
+} else {
+  console.log("\n====   SELF CHECK PASS   ====\n");
+}
+
 interface RateLimitOptions {
   windowMs: number;
   limit: number;
@@ -35,7 +45,7 @@ app.listen(PORT, () => {
       console.log('mail-connect');
       console.log('Version: 0.1.1');
       console.log(`API listening on port ${PORT}\n`);
-      console.dir("[!] " + err);
+      console.log("[!] " + err);
     } else {
       console.log(data);
       console.log('Version: 0.1.1');