feat: Add /api/register endpoint

backend/src/main.ts

@@ -1,4 +1,6 @@
-import { env } from "process";
+import { env, exit } from "process";
+// import * as fs from "fs";
+import { randomBytes, pbkdf2Sync } from "crypto";
 import * as assert from "assert";
 
 import * as express from "express";
@@ -6,6 +8,9 @@ import * as cors from "cors";
 
 import * as bodyparser from "body-parser";
 
+//@ts-ignore
+//import * as Filter from "bad-words";
+
 import { isAuthenticated, performLogin } from "./security/auth";
 
 import { LRequest } from "./types/express";
@@ -23,6 +28,12 @@ const user = encodeURIComponent("backend");
 const password = encodeURIComponent(env["LATEINICUS_USER_PW"]);
 
 (async function() {
+    // Load the profanity list
+    // const list = JSON.parse(fs.readFileSync("/etc/profanity", { encoding: "utf-8" }));
+    // const profanityFilter = new Filter({
+    //     list,
+    // });
+
     // Database Name
     const dbName = 'lateinicus';
     // Connection URL
@@ -80,6 +91,85 @@ const password = encodeURIComponent(env["LATEINICUS_USER_PW"]);
             },
         });
     });
+    app.post("/api/register", async (req, res) => {
+        // Check if any data was sent
+        if (!req.body) {
+            res.send({
+                error: "403",
+                data: {
+                    msg: `No data sent`,
+                },
+            });
+            return;
+        }
+
+        // Check if we have all we need
+        const params = ["username", "password", "classId"];
+        for (let param of params) {
+            if (!(param in req.body)) {
+                res.send({
+                    error: "403",
+                    data: {
+                        msg: `${param} not specified!`,
+                    },
+                });
+                return;
+            }
+        }
+
+        const { username, password, classId } = req.body;
+
+        // TODO: Check if the username is profane
+        // if (profanityFilter.isProfane(username)) {
+        //     res.send({
+        //         error: "451",
+        //         data: {
+        //             msg: "Profane username",
+        //         },
+        //     });
+        //     return;
+        // }
+
+        // Check if the user already exists
+        const checkUser = await db.collection("users").findOne({
+            username,
+        });
+        if (checkUser) {
+            res.send({
+                error: "403",
+                data: {
+                    msg: "User already exists",
+                },
+            });
+            return;
+        }
+
+        const salt = randomBytes(30).toString("hex");
+        const hash = pbkdf2Sync(password, salt, 50000, 512, "sha512").toString("hex");
+        const user = {
+            username,
+            salt,
+            hash,
+            classId,
+            score: 0,
+            showWelcome: true,
+
+            lastReview: {
+                correct: 0,
+                wrong: 0,
+            },
+
+            lastLevel: 0,
+            levels: [] as number[],
+            vocabMetadata: {},
+        };
+        await db.collection("users").insertOne(user);
+
+        res.send({
+            error: "200",
+            data: {},
+        });
+    });
     app.get("/api/health", (req, res) => {
         res.send({
             error: "0",