Implemented basic auth

ref #26

src/config.ts

@@ -1,3 +1,4 @@
+import consola from "consola";
 import { config as configDotenv } from 'dotenv';
 
 configDotenv();
@@ -9,7 +10,8 @@ export const config = {
     currency_symbol: process.env.CURRENCY_SYMBOL || "€",
     sponsoring_receipt_minimum_amount: process.env.SPONSORING_RECEIPT_MINIMUM_AMOUNT || "10",
     codeformat: process.env.CODEFORMAT || "qrcode",
-    sponor_logos: getSponsorLogos()
+    sponor_logos: getSponsorLogos(),
+    api_key: getApiKey(),
 }
 let errors = 0
 if (typeof config.internal_port !== "number") {
@@ -27,4 +29,23 @@ function getSponsorLogos(): string[] {
         return ["data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg=="];
     }
 }
+
+function getApiKey(): string {
+    const key = process.env.API_KEY;
+    if (!key) {
+        consola.info("No API key set - generating a random one...");
+        let result = '';
+        const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+        const charactersLength = characters.length;
+        for (var i = 0; i < 64; i++) {
+            result += characters.charAt(Math.floor(Math.random() * charactersLength));
+        }
+        consola.info(`API KEY: ${result}`)
+        return result;
+    }
+    if (key.length < 64) {
+        consola.error(`API key is too short - minimum: 64, current: ${key.length}`)
+        throw new Error("API_KEY too short.")
+    }
+}
 export let e = errors