added arg preprocessors

src/handler/utils/preprocessors/args.ts

@@ -0,0 +1,23 @@
+import { Err, Ok, Result } from "ts-results";
+import type { possibleOutput } from "../../../types/handler/handler";
+
+
+export namespace Utils {
+    /**
+     * Wrapper type taking `Ok(T)` or `Err(possibleOutput)` e.g `Result<T, possibleOutput`
+     */
+    type ArgType<T> = Result<T, possibleOutput>
+    /**
+     * 
+     * @param {string} arg 
+     * @param {possibleOutput} onFailure 
+     * @returns {ArgType<number>} Attempts to use Number.parseInt() on `arg`
+     */
+    export function parseInt(arg: string, onFailure: possibleOutput): ArgType<number> {
+        const val = Number.parseInt(arg);
+        return val === NaN ? Err(onFailure) : Ok(val);
+    }
+    
+}
+
+

src/index.ts

@@ -1,4 +1,5 @@
 import { Sern } from "./handler/sern/sern";
 
+
 module.exports = Sern;
 export default Sern;

src/types/handler/handler.ts

@@ -1,7 +1,7 @@
 import type { Ok, Result } from 'ts-results';
 import type { Awaitable, Client, Message, MessagePayload} from 'discord.js';
 import type { MessageOptions } from 'child_process';
-import type Sern from '../..';
+import type { Sern } from '../../handler/sern/sern';
 
 export type Visibility = "private" | "public"
 export type possibleOutput = string | MessagePayload & MessageOptions