HD Example One

exampleone.ts

// Dependencies
import { hash } from "jsr:@ts-rex/bcrypt";
import { Hono } from "jsr:@hono/hono";
import { encode } from "jsr:@gz/jwt";

// Environment Variables
const DATABASE_URL = Deno.env.get("DATABASE_URL"); // Gets the DatabaseURL from the env.
const JWT_SECRET = Deno.env.get("JWT_SECRET"); // Gets the JWT Secret from the env.

// Create App
const app = new Hono(); // Creates a new Hono app.
const kv = await Deno.openKv(DATABASE_URL); // Create a Database Instance.

// Route (/)
app.get("/", (c) => {
    const query = c.req.query("q"); // Gets the 'q' query in the URL.

    if (!query) {
        return c.text("400 Bad Request", 400); // Returns 400 if query not found.
    }

    const hashed_query = hash(query); // Hashes the query.
    return c.text(hashed_query); // Returns the hashed query as text.
});

// Route (/create-user)
app.post("/create-user", async (c) => {
    // Body
    const req_body = await c.req.parseBody(); // Parses the request body.
    const un = req_body["username"]; // Variable from Username in body.
    const up = req_body["password"]; // Variable from Password in body.

    // Exist Check
    if (!un || !up) {
        return c.text("400 Bad Request", 400); // Returns 400 if Username or Password missing from body.
    }

    // Type Check
    if (typeof un !== "string" || typeof up !== "string") {
        return c.text("400 Bad Request", 400); // Returns 400 if the Username or Password is not a string.
    }

    // Check Already Exists
    const existing_user = await kv.get(["users", un]); // Get's a user from the database 'Users', via the username.
    if (existing_user.value) {
        return c.text("401 Unauthorized", 401); // Returns 401 if the user with the username already exists.
    }

    // Create User
    await kv.set(["users", un], { // Creates the user in the database.
        username: un,
        password: hash(up),
    });

    // Create JWT
    const json_token = await encode( // Creates a JSON Web Token for the frontend.
        {
            username: un,
        },
        JWT_SECRET || "TestingSecret",
        {
            algorithm: "HS256",
        }
    );

    return c.json({ // Returns success true and the JSON Web Token.
        success: true,
        token: json_token,
    });
});

// Serve App
Deno.serve(app.fetch); // Serves the Hono app via Deno.Serve