Moise Mokoy - Frontend, Backend, Database Challenges

challenges/.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto
+/backendChallenge/node_modules
+/frontEndChallenge/node_modules
+/frontEndChallenge/.env

challenges/backendChallenge/app.js

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+const express = require('express');
+const session = require("express-session");
+const port = 3000;
+
+const app = express();
+
+app.use(express.urlencoded({ extended: true })); // for parsing application/x-www.form-urlencoded
+app.use(express.json());// for parsing application/json
+
+app.use(session({
+        secret: "mbokaElengi",
+        resave: false,
+        saveUninitialized: true
+    })
+);
+
+app.post('/data',(req,res) =>{
+
+    let data = req.body.numbers;
+    //check for data is not empty
+    if (data === undefined) {
+        return res.json({ status: "400", message: "undefined" });
+    }
+
+    //check for data less than 500
+    if (data.length < 500) {
+        return res.json({ status: "400", message: "You provide less than 500. Your data length need to be exactly 500" });
+
+    }
+    //check for data more than 500
+    if (data.length > 500) {
+        return res.json({ status: "400", message: "You provide more than 500. Your data length need to be exactly 500" });
+    }
+    //check for data containing other type of data
+    for (let i = 0; i < data.length; i++) {
+        if (typeof (data[i]) !== 'number' || !Number.isFinite(data[i])) {
+            return res.json({ status: "400", message: "invalid number found in you data" });
+        }
+    }
+
+    //add data to session
+    req.session.data = data;
+    return res.json({ status: "201", message: "Created!" });
+});
+
+app.get('/data', (req, res) => {
+    if (req.session.data === undefined) {
+        return res.json({ status: "404", message: "No data found in the session" });
+    } else {
+        let array = req.session.data.slice();
+        return res.json(array.sort(function (a, b) {return a - b}));
+    }
+});
+
+app.patch("/data", (req, res) => {
+    //looking for numbers in session
+    if (req.session.data === undefined) {
+        return res.json({ status: "404", message: "No data found in the session" });
+    } else {
+
+        let value = req.body.value;
+        let index = req.body.index;
+        if (typeof (value) !== 'number' || !Number.isFinite(index)) {
+            console.log(typeof (value))
+            return res.json({ status: "404", message: "You didn't enter a valid number"});
+        }
+        if (typeof (index) !== 'number' || !Number.isFinite(index)) {
+            return res.json({ status: "404", message: "Make sure you enter a number" });
+        }
+        if (index < 0 || index > 499) {
+            return res.json(buildError("The index you provide is invalid"));
+        }
+        req.session.data[index] = value;
+        return res.json({ status: "ok", message: "Numbers updated!" });
+    }
+});
+
+app.listen(port, () =>console.log(`Server listening in port ${port}`));