chore: offload retrieval of environment variables from jwt.ts to env.ts

src/tools/env.ts

@@ -0,0 +1,37 @@
+import * as dotenv from 'dotenv';
+dotenv.config({ quiet: true });
+
+/**
+ * Get the environmental string from .env.
+ * Supports rewriting names to UPPER_SNAKE_CASE if isGlobal is set.
+ *
+ * @param      {string}              key              The key
+ * @param      {boolean}             [isGlobal=true]  Indicates if global
+ * @return     {(string|undefined)}  The environment string.
+ */
+export function getString(
+	key: string,
+	isGlobal: boolean = true
+): string | undefined {
+	let keyName: string = '';
+
+	if (isGlobal) {
+		// Global values are DECLARED_LIKE_THIS=...
+		for (let i: number = 0; i < key.length; i++) {
+			if (key[i].toLowerCase() === key[i]) {
+				// If is lowercase, skip.
+				keyName += key[i];
+			} else {
+				// If is uppercase, convert to snake case.
+				keyName += `_${key[i].toLowerCase()}`;
+			}
+		}
+		keyName = keyName.toUpperCase();
+	} else {
+		// Non-global keys are parsed as passed
+		keyName = key;
+	}
+
+	return process.env[keyName];
+}
+