added a short url generator project (#241)

Fixes #123 
short url generator project is completed !
 #Before
<img width="365" alt="Screenshot 2023-10-03 210041"
src="https://github.com/Git21221/JS-beginner-projects/assets/119128989/2a1c407a-8134-42d9-8cf5-cf3e6eb72f29">
#After
<img width="304" alt="Screenshot 2023-10-03 210255"
src="https://github.com/Git21221/JS-beginner-projects/assets/119128989/d041f427-4387-4985-aa3f-03c04d9f82af">

Url-Shortner/connect.js

@@ -0,0 +1,7 @@
+const mongoose=require("mongoose")
+async function connectToMongoDB(url){
+    return mongoose.connect(url);
+}
+module.exports={
+    connectToMongoDB,
+}

Url-Shortner/controllers/url.js

@@ -0,0 +1,33 @@
+const shortid = require("shortid");
+const URL = require("../models/url");
+
+async function handleGenerateNewShortURL(req, res) {
+  const body = req.body;
+  if (!body.url) return res.status(400).json({ error: "url is required" });
+  const shortID = shortid();
+
+  await URL.create({
+    shortId: shortID,
+    redirectURL: body.url,
+    visitHistory: [],
+
+  });
+
+  return res.render("home", {
+    id: shortID,
+  });
+}
+
+async function handleAnalytics(req, res) {
+  const shortId = req.params.shortId;
+  const result = await URL.findOne({ shortId });
+  return res.json({
+    totalClicks: result.visitHistory.length,
+    analytics: result.visitHistory,
+  });
+}
+
+module.exports = {
+  handleGenerateNewShortURL,
+  handleAnalytics,
+};

Url-Shortner/index.js

@@ -0,0 +1,43 @@
+const express = require("express");
+const path = require("path");
+const cookieParser = require("cookie-parser");
+const { connectToMongoDB } = require("./connect");
+const URL = require("./models/url");
+const urlRoute = require("./routes/url");
+const staticRoute = require("./routes/staticRouter");
+const app = express();
+const PORT = 3000;
+
+connectToMongoDB(process.env.MONGODB ?? "mongodb://localhost:27017/short-url").then(() =>
+  console.log("Mongodb connected")
+);
+
+app.set("view engine", "ejs");
+app.set("views", path.resolve("./views"));
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+
+app.use("/url", urlRoute);
+
+app.use("/", staticRoute);
+
+app.get("/url/:shortId", async (req, res) => {
+  const shortId = req.params.shortId;
+  const entry = await URL.findOneAndUpdate(
+    {
+      shortId,
+    },
+    {
+      $push: {
+        visitHistory: {
+          timestamp: Date.now(),
+        },
+      },
+    }
+  );
+  res.redirect(entry.redirectURL);
+});
+
+app.listen(PORT, () => console.log(`Server Started at PORT:${PORT}`));

Url-Shortner/models/url.js

@@ -0,0 +1,25 @@
+const mongoose = require("mongoose");
+
+const urlSchema = new mongoose.Schema(
+  {
+    shortId: {
+      type: String,
+      required: true,
+      unique: true,
+    },
+    redirectURL: {
+      type: String,
+      required: true,
+    },
+    visitHistory: [{ timestamp: { type: Number } }],
+    createdBy: {
+      type: mongoose.Schema.Types.ObjectId,
+      ref: "users",
+    },
+  },
+  { timestamps: true }
+);
+
+const URL = mongoose.model("url", urlSchema);
+
+module.exports = URL;