User data interface and other changes

apisgatewayservice/.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+coverage

apisgatewayservice/Dockerfile

@@ -0,0 +1,17 @@
+# Use an official Node.js runtime as a parent image
+FROM node:20
+
+# Set the working directory in the container
+WORKDIR /usr/src/apisgatewayservice
+
+# Copy package.json and package-lock.json to the working directory
+COPY package*.json ./
+
+# Install app dependencies
+RUN npm install
+
+# Copy the app source code to the working directory
+COPY . .
+
+# Define the command to run your app
+CMD ["node", "apis-gateway-service.js"]

apisgatewayservice/apis-gateway-service.js

@@ -0,0 +1,57 @@
+const express = require('express');
+const axios = require('axios');
+const cors = require('cors');
+const promBundle = require('express-prom-bundle');
+
+const app = express();
+const port = 8100;
+
+const storeQuestionsServiceUrl = process.env.STORE_QUESTION_SERVICE_URL || 'http://localhost:8004'
+const userStatsServiceUrl = process.env.USER_STATS_SERVICE_URL || 'http://localhost:8003';
+const userServiceUrl = process.env.USER_SERVICE_URL || 'http://localhost:8001';
+
+app.use(cors());
+app.use(express.json());
+
+//Prometheus configuration
+const metricsMiddleware = promBundle({includeMethod: true});
+
+function catchAction(error, res) {
+  if ('response' in error && 'status' in error.response && 'data' in error.response && 'error' in error.response.data)
+    res.status(error.response.status).json({ error: error.response.data.error });
+  else if('response' in error && 'status' in error.response){
+    res.status(error.response.status).json({ error: 'Unknown error' });
+  } else {
+    console.log("Unknown error: " + error);
+  }
+  // } else {
+  //   res.status(500).json({ error: 'Internal server error' });
+  // }
+}
+
+app.use(metricsMiddleware);
+
+app.get('/users', async (req, res) => {
+  try {
+    const response = await axios.get(userServiceUrl+`/users`);
+    res.json(response.data);
+  } catch (error) {
+    catchAction(error, res)
+  }
+})
+
+app.get('/history/questions', async (req, res) => {
+  try {
+    const response = await axios.get(storeQuestionsServiceUrl+'/history/questions');
+    res.json(response.data);
+  } catch (error) {
+    catchAction(error, res)
+  }
+})
+
+// Start the gateway service
+const server = app.listen(port, () => {
+  console.log(`Gateway Service listening at http://localhost:${port}`);
+});
+
+module.exports = server

apisgatewayservice/apis-gateway-service.test.js

@@ -0,0 +1,64 @@
+const request = require('supertest');
+const axios = require('axios');
+const app = require('./apis-gateway-service'); 
+
+afterAll(async () => {
+    app.close();
+});
+
+jest.mock('axios');
+
+describe('User Service', () => {
+    describe('/users', () => {
+      it('should return user information', async () => {
+        const mockUsers = [
+          { username: 'user1', createdAt: new Date() },
+          { username: 'user2', createdAt: new Date() }
+        ];
+        User.find = jest.fn().mockResolvedValue(mockUsers);
+
+        const res = await request(app).get('/users');
+
+        expect(res.statusCode).toEqual(200);
+
+        expect(res.body).toEqual(mockUsers);
+      });
+
+      it('should handle errors', async () => {
+
+        User.find = jest.fn().mockRejectedValue(new Error('Database error'));
+
+        const res = await request(app).get('/users');
+
+        expect(res.statusCode).toEqual(500);
+
+        expect(res.body).toEqual({ error: 'Database error' });
+      });
+    });
+  });
+
+
+describe('Gateway Service', () => {
+  describe('/history/questions', () => {
+      it('should return all questions', async () => {
+          const mockData = [{
+              pregunta: '¿Cuál es la capital de la comunidad autónoma de Castilla y León?',
+              respuesta_correcta: 'Ninguna',
+              respuestas_incorrectas: ['Segovia','León','Valladolid']
+          }];
+          axios.get.mockResolvedValue({ data: mockData });
+
+          const res = await request(app).get('/history/questions');
+          expect(res.statusCode).toEqual(200);
+          expect(res.body).toEqual(mockData);
+      });
+
+      it('should handle errors', async () => {
+          axios.get.mockRejectedValue(new Error('Error'));
+
+          const res = await request(app).get('/history/questions');
+          expect(res.statusCode).toEqual(500);
+          expect(res.body).toEqual({ error: 'Error' });
+      });
+  });
+});

apisgatewayservice/monitoring/grafana/provisioning/dashboards/dashboard.yml

@@ -0,0 +1,11 @@
+apiVersion: 1
+
+providers:
+- name: 'Prometheus'
+  orgId: 1
+  folder: ''
+  type: file
+  disableDeletion: false
+  editable: true
+  options:
+    path: /etc/grafana/provisioning/dashboards