From 78fa2835abe7ff49995ad82bd28dbb956375b875 Mon Sep 17 00:00:00 2001
From: Flam3rboy <34555296+Flam3rboy@users.noreply.github.com>
Date: Fri, 7 May 2021 20:03:24 +0200
Subject: :art: [Route] templates refactor

---
 src/util/Base64.ts | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 src/util/String.ts |  5 +++++
 2 files changed, 52 insertions(+)
 create mode 100644 src/util/Base64.ts

(limited to 'src/util')

diff --git a/src/util/Base64.ts b/src/util/Base64.ts
new file mode 100644
index 00000000..46cff77a
--- /dev/null
+++ b/src/util/Base64.ts
@@ -0,0 +1,47 @@
+const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+";
+
+// binary to string lookup table
+const b2s = alphabet.split("");
+
+// string to binary lookup table
+// 123 == 'z'.charCodeAt(0) + 1
+const s2b = new Array(123);
+for (let i = 0; i < alphabet.length; i++) {
+	s2b[alphabet.charCodeAt(i)] = i;
+}
+
+// number to base64
+export const ntob = (n: number): string => {
+	if (n < 0) return `-${ntob(-n)}`;
+
+	let lo = n >>> 0;
+	let hi = (n / 4294967296) >>> 0;
+
+	let right = "";
+	while (hi > 0) {
+		right = b2s[0x3f & lo] + right;
+		lo >>>= 6;
+		lo |= (0x3f & hi) << 26;
+		hi >>>= 6;
+	}
+
+	let left = "";
+	do {
+		left = b2s[0x3f & lo] + left;
+		lo >>>= 6;
+	} while (lo > 0);
+
+	return left + right;
+};
+
+// base64 to number
+export const bton = (base64: string) => {
+	let number = 0;
+	const sign = base64.charAt(0) === "-" ? 1 : 0;
+
+	for (let i = sign; i < base64.length; i++) {
+		number = number * 64 + s2b[base64.charCodeAt(i)];
+	}
+
+	return sign ? -number : number;
+};
diff --git a/src/util/String.ts b/src/util/String.ts
index 3a8e35a8..49fba237 100644
--- a/src/util/String.ts
+++ b/src/util/String.ts
@@ -1,4 +1,5 @@
 import { Request } from "express";
+import { ntob } from "./Base64";
 import { FieldErrors } from "./instanceOf";
 
 export function checkLength(str: string, min: number, max: number, key: string, req: Request) {
@@ -11,3 +12,7 @@ export function checkLength(str: string, min: number, max: number, key: string,
 		});
 	}
 }
+
+export function generateCode() {
+	return ntob(Date.now() + Math.randomIntBetween(0, 10000));
+}
-- 
cgit 1.5.1