Fix LatestService to adhere to ORM

itu-minitwit-node/src/model/Latest.js

@@ -0,0 +1,17 @@
+const { DataTypes } = require('sequelize');
+const sequelize = require('../db/sequelize');
+
+const Latest = sequelize.define('latest', {
+    latest_id: {
+        type: DataTypes.INTEGER.UNSIGNED,
+        primaryKey: true,
+        allowNull: false,
+        autoIncrement: false
+    },
+},{
+    tableName: 'latest',
+    timestamps: false
+  })
+
+
+module.exports = Latest;

itu-minitwit-node/src/routes/simulator.js

@@ -22,7 +22,8 @@ const getFollowersFromUser = new GetFollowersFromUser();
 
 //Routing
 router.get('/latest', async function (req, res) {
-  res.send({ latest: latestService.getLatest() });
+  const latest = await latestService.getLatestSeq()
+  res.send({ latest });
 })
 
 router.post("/register", async function (req, res, next) {
@@ -44,7 +45,7 @@ router.post("/register", async function (req, res, next) {
     //Updates Latest
     var latest = req.query.latest;
     if (latest !== undefined && !isNaN(parseInt(latest))) {
-      await latestService.updateLatest(parseInt(latest));
+      await latestService.updateLatestSeq(parseInt(latest));
     }
 
     //Checks if username is taken

itu-minitwit-node/src/services/LatestService.js

@@ -1,8 +1,18 @@
-const database = require('../db/dbService')
+const database = require('../db/dbService');
+const Latest = require('../model/Latest');
 
 module.exports = class LatestService {
     constructor() { }
+
 
+    async getLatestSeq() {
+        const latest = await Latest.findOne();
+        return new Promise((resolve, reject) => {
+            latest ? resolve(latest.latest_id) : reject(new Error("No rows found"));
+        });
+    }
+
+    /*
     async getLatest() {
         const query = "SELECT latest_id FROM latest;";
         return new Promise((resolve, reject) => {
@@ -15,8 +25,20 @@ module.exports = class LatestService {
                 }
             });
         })
+    }*/
+
+    async updateLatestSeq(value){
+        const latest = await Latest.findOne()
+        const update = await Latest.update(
+            { latest_id: value },
+            { where: { latest_id: latest.latest_id }}
+        )
+        return new Promise((resolve, reject) => {
+            update ? resolve() : reject(update)
+        })
     }
 
+    /*
     async updateLatest(value) {
         return new Promise((resolve, reject) => {
             const query = "UPDATE latest SET latest_id = ?;";
@@ -28,6 +50,7 @@ module.exports = class LatestService {
                 }
             });
         });
-
     }
+    */
+
 }