Alpha Judge0 sample.

eval.ts

import * as ts from "typescript";

const code: string = `
const solve = (heights: number[]): number => {
    let max = 0;
    for (let x1 = 0; x1 < heights.length; x1++) {
        for (let x2 = 0; x2 < heights.length; x2++) {
            const h = Math.min(heights[x1], heights[x2]);
            const w = Math.abs(x2 - x1);
            max = Math.max(max, h * w);
        }
    }
    return max;
}`;

const jscode = ts.transpile(code);
console.log(jscode);

const HOST = "alpha-1:2358"
// Get yours for free at https://judge0.com/ce or https://judge0.com/extra-ce
const API_KEY = "";

var language_to_id = {
    "Bash": 46,
    "C": 50,
    "C#": 51,
    "C++": 54,
    "Java": 62,
    "Python3": 71,
    "Ruby": 72,
    "TypeScript": 74,
};

function encode(str: string): string {
    const bytes = new TextEncoder().encode(str);
    const base64 = base64encode(bytes);
    return base64
}

function decode(base64: string): string {
    const bytes = base64decode(base64);
    const text = new TextDecoder().decode(bytes);
    return text;
}

function base64encode(data: Uint8Array) {
    return btoa([...data].map(n => String.fromCharCode(n)).join(""));
}

function base64decode(data: string) {
    return new Uint8Array([...atob(data)].map(s => s.charCodeAt(0)));
}

function check(token: string) {
    console.log("Checking submission status...");
    fetch(`http://${HOST}/submissions/${token}?base64_encoded=true`,
        {
            method: "GET",
            headers: {
                "x-rapidapi-host": HOST,
                "x-rapidapi-key": API_KEY
            },
        }).then(data => {
            // console.log(data);
            return data.json();
        }).then(json => {
            if ([1, 2].includes(json["status"]["id"])) {
                console.log("Status: " + json["status"]["description"]);
                setTimeout(function () {
                    check(token)
                }, 1000);
            } else {
                const output = decode(json["stdout"]);
                const out = json["status"]["description"] + '\n' +
                    output;
                console.log(out);
            }
        })
}

function run(tscode: string, expected: string) {
    fetch(`http://${HOST}/submissions?base64_encoded=true&wait=false`,
        {
            method: "POST",
            headers: {
                'Content-Type': "application/json",
                "x-rapidapi-host": HOST,
                "x-rapidapi-key": API_KEY
            },
            body: JSON.stringify({
                "language_id": language_to_id["TypeScript"],
                "source_code": encode(tscode),
                "stdin": "",
                "expected_output": encode(expected),
                "redirect_stderr_to_stdout": true
            })
        }).then(data => {
            // console.log(data);
            return data.json();
        }).then(json => {
            const token = json["token"];
            // console.log(token);
            setTimeout(function () {
                check(token);
            }, 1000);
        })
}

const tscode = `
const runnable: any = new Function(\`${jscode}\` + ';return solve;')();
const result = runnable([1, 8, 6, 2, 5, 4, 8, 3, 7]);
console.log(result);`;
run(tscode, "49");