finished-the expense-express

App.js

@@ -1,3 +1,66 @@
-const expense = [{id:1,description:"Food",amount:35}]
+const express = require("express");
+const res = require("express/lib/response");
+
+const app = express();
+
+app.use(express.json())
+
+app.listen(8000,()=>{
+    console.log("hi")
+})
+ let Expenses = [{id:10, description:"food", amount:20},{id:18, description:"shopping", amount:40},{id:27, description:"petrol", amount:90}]
+
+app.get("/expenses/:id",(req,res)=>{
+
+    let sel = req.params.id 
+    let selected = Expenses.filter((expe) => expe.id == sel )
+
+
+    res.status(200).json({expenses:selected})
+})
+
+app.post("/expenses",(req,res)=>{
+
+    let id = Expenses[Expenses.length - 1] ? Expenses[Expenses.length - 1].id + 1 : 1
+    Expenses.push({id:id, description:req.body.description, amount:req.body.amount})
+    res.status(201).json({expenses:Expenses})
+
+})
+
+app.get("/expenses",(req,res)=>{
+    res.status(200).json({expenses:Expenses})
+})
+
+app.get("/expense/:total",(req,res)=>{
+
+    let total = 0;
+    for (let i = 0; i < Expenses.length; i++) {
+    total = Number(total + Expenses[i].amount) ;
+
+    }
+
+    res.status(206).json({totalAmount:total})
+})
+
+app.delete("/expense/:id",(req,res)=>{
+
+     let del = req.params.id 
+    let remained = Expenses.filter((expe) => expe.id != del )
+    Expenses = remained
+
+    res.status(200).json({expenses:Expenses})
+
+})
+
+app.put("/expense/:id",(req,res)=>{
+    let sel = req.params.id 
+    let newEx= Expenses.filter((expe) => expe.id == sel )  
+    let unchanged =  Expenses.filter((expe) => expe.id != sel ) 
+    newEx = [{id:sel, description:req.body.description, amount:req.body.amount}] 
+     Expenses =    newEx.concat(unchanged)
+
+    res.status(200).json({expenses:Expenses})
+
+})
 
 

package.json

@@ -4,7 +4,7 @@
   "description": "",
   "main": "App.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "start": "node App.js"
   },
   "keywords": [],
   "author": "",