code changes

Author: Hashcode-Ankit

auth-service.js

@@ -0,0 +1,86 @@
+var mongoose = require("mongoose");
+var Schema = mongoose.Schema;
+const bcrypt = require('bcryptjs');
+var userSchema = new Schema({
+  "userName":  String,
+  "password": String,
+  "email": String,
+  "loginHistory": [ {
+    "dateTime": Date,
+    "userAgent": String,
+  }]
+});
+let User;
+function initialize(){
+    let db = mongoose.createConnection(`mongodb+srv://rajatkumar:[email protected]/myFirstDatabase?retryWrites=true&w=majority`);;
+    return new Promise((resolve,reject)=>{
+
+        db.on('error', (err)=>{
+            reject(Error("Db not Connected"));
+          });
+        db.once('open', ()=>{
+        User = db.model("users", userSchema);
+        resolve("db1 success!");
+        });
+    })
+}
+
+function registerUser(userData) {
+    return new Promise((resolve,reject)=>{
+    if(userData.password != userData.password2){
+        reject("Password do not match");
+    }
+
+    bcrypt.hash(userData.password, 10).then((hash)=>{ 
+     userData.password=hash;
+     let newUser= new User(userData);
+     newUser.save((err)=>{
+         if(err){
+             reject(Error("User Name Already Taken "))
+         }
+         else if(err){
+             reject("There was an error creating the user:"+err);
+         }
+         else{
+             resolve();
+         }
+     })
+    })
+    .catch(err=>{
+        console.log(err); // Show any errors that occurred during the process
+    });
+   
+})
+}
+
+function checkUser(userData){
+    return new Promise((resolve,reject)=>{
+        User.find({userName: userData.userName})
+        .exec().then((data)=>{
+            if(data.length==0){
+                reject("Unable to Find user"+userData.userName)
+            }
+            bcrypt.compare(userData.password, data[0].password).then((result) => {
+                if(!result){
+                    reject("Incorrect Password for user : "+ userData.userName);
+                }
+                else{
+                   data[0].loginHistory.push({dateTime: (new Date()).toString(), userAgent: userData.userAgent})
+                   User.updateOne(
+                       {userName: data[0].userName},
+                       {$set : { loginHistory : data[0].loginHistory}}
+                       ).exec().then(()=>{
+                          resolve(data[0])
+                       }).catch(function(error){
+                        reject("There was an error verifying the user : "+err)
+                    });
+                }
+            })
+           
+        }).catch(function(error){
+            reject("unable to find the user : "+ userData.userName +error)
+        });
+    })
+}
+
+module.exports={initialize,registerUser,checkUser }