From 7ba695f4e35e2282c856ecb0695a630d1d4b2647 Mon Sep 17 00:00:00 2001
From: "Kalle (Sendou)" <38327916+Sendouc@users.noreply.github.com>
Date: Sun, 24 Oct 2021 15:42:09 +0300
Subject: [PATCH] Validate env vars on boot up

---
 packages/server/src/index.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/packages/server/src/index.ts b/packages/server/src/index.ts
index fd95feff0..679228fc2 100644
--- a/packages/server/src/index.ts
+++ b/packages/server/src/index.ts
@@ -12,6 +12,8 @@ const app = new App();
 
 const PORT = 3001;
 
+validateEnvVars();
+
 passport.use(
   new DiscordStrategy(
     {
@@ -65,3 +67,22 @@ app
   .listen(PORT, () =>
     console.log(`Server ready at: https://localhost:${PORT}`)
   );
+
+function validateEnvVars() {
+  const logInEnvVars = [
+    "DISCORD_CLIENT_ID",
+    "DISCORD_CLIENT_SECRET",
+    "DISCORD_CALLBACK_URL",
+  ].filter((envVar) => !process.env[envVar]);
+
+  if (logInEnvVars.length === 0) return;
+
+  if (process.env.NODE_ENV === "development") {
+    console.warn(
+      "Missing env vars for testing logging in:",
+      logInEnvVars.join(", ")
+    );
+  } else {
+    throw new Error("Missing env vars for logging in");
+  }
+}