Add frontend and backend files

.gitignore

@@ -0,0 +1,8 @@
+.env
+.overnodebundle
+*.old
+node/node_modules
+nginx-react/node_modules
+nginx-react/build
+.vscode
+dummyEmitter

backend/.dockerignore

@@ -0,0 +1,5 @@
+./node_modules
+./build
+.git
+*.md
+.gitignore

backend/Dockerfile

@@ -1 +1,16 @@
+# pull official node image
 FROM node
+
+# define /app as working directory
+WORKDIR /app
+
+# copy package.json and package-lock.json to /app
+COPY package.json /app
+COPY package-lock.json /app
+
+# install node dependencies
+RUN npm install
+COPY . /app
+
+# launch node server
+ENTRYPOINT node server.js

backend/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js",
+    "build": "cd frontend && npm install && npm run build"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.17.2",
+    "minio": "^7.0.26",
+    "mongodb": "^4.3.1"
+  }
+}

backend/server.js

@@ -0,0 +1,93 @@
+const { MongoClient } = require("mongodb");
+const express = require('express');
+const minio = require('minio');
+
+  /*============== VARIABLE DECLARATION ==============*/
+// Mongo set-up variables
+const mongoEndpoint = process.env.ME_CONFIG_MONGODB_SERVER;
+const mongoPort = parseInt(process.env.ME_CONFIG_MONGODB_PORT);
+const mongoDatabase = process.env.ME_CONFIG_MONGODB_DB;
+const mongoCollection = process.env.ME_CONFIG_MONGODB_COLLECTION;
+
+// Minio set-up variables
+const minioEndpoint = process.env.MINIO_ENDPOINT;
+const minioBucket = process.env.MINIO_BUCKET;
+const minioPort = parseInt(process.env.MINIO_SERVING_PORT);
+const minioKey = process.env.MINIO_ACCESS_KEY;
+const minioSecret = process.env.MINIO_SECRET_KEY;
+
+// Stream set-up variables
+let changeStream;
+const options = { fullDocument: "updateLookup" };
+const pipeline = [];
+const PORT = process.env.PORT || 3002;
+
+// Create Mongo client
+const MONGO_URI = `mongodb://${mongoEndpoint}:${mongoPort}`;
+const mongoClient = new MongoClient(MONGO_URI);
+
+
+/*============== CODE ==============*/
+async function run() {
+
+  console.log('server.js has been launched')
+
+  const app = express();
+
+  // Configuring mongoDB connection
+  await mongoClient.connect();
+  const database = mongoClient.db(mongoDatabase);
+  const collection = database.collection(mongoCollection);
+
+  // Notify connection
+  console.log(`Connection established with Mongo Database at ${MONGO_URI}`);
+
+  // Opening event listener on the database
+  changeStream = collection.watch(pipeline, options);
+  console.log("Started watching changes in database");
+
+  app.get('/events', async function (request, response) {
+    let eventArray = [];
+
+    let minioClient = new minio.Client({
+      endPoint: minioEndpoint,
+      port: minioPort,
+      useSSL: false,
+      accessKey: minioKey,
+      secretKey: minioSecret
+    });
+
+    // notifies GET requests
+    console.log('/events was requested');
+
+    // Setting the header to event-stream for Server Sent Events (Eventsource)
+    const header = { 'Content-Type': 'text/event-stream', 'Connection': 'keep-alive' }
+    response.writeHead(200, "OK", header);
+    response.write('Connection established \n\n');
+
+    // Triggers callback on every change in collection set up
+    changeStream.on("change", data => {
+
+      // Retrieves modified document on the db and stores it
+      let document = JSON.stringify(data.fullDocument);
+      eventArray = [document, ...eventArray];
+
+      // Fetch screenshot if there is one
+      if (data.fullDocument.screenshot_count) {
+        minioClient.presignedUrl('GET', minioBucket, `${data.fullDocument.camera}/${data.fullDocument._id}/1.jpg`, 60 * 60, (err, presignedUrl) => {
+          if (err) { return console.log(err) };
+          const realURL = JSON.stringify({ picUrl: presignedUrl });
+          eventArray = [realURL, ...eventArray];
+        })
+      }
+
+      // sends updated array
+      response.write(`data: [${[...eventArray]}]\n\n`);
+    });
+  });
+
+  app.listen(PORT);
+  console.log(`Server listening at 127.0.0.1:${PORT}`);
+}
+
+run().catch(console.dir);

frontend/.dockerignore

@@ -0,0 +1,5 @@
+./node_modules
+./build
+.git
+*.md
+.gitignore

frontend/Dockerfile

@@ -1,5 +1,39 @@
+# pull official base image
 FROM node AS builder
 
+# set working directory
+WORKDIR /app
+
+
+# install app dependencies
+#copies package.json and package-lock.json to Docker environment
+COPY package.json ./
+
+# Installs all node packages
+RUN npm install 
+
+
+# Copies everything over to Docker environment
+COPY . ./
+RUN npm run build
+
+#Stage 2
+#######################################
+#pull the official nginx:1.19.0 base image
 FROM nginx
+
+#copies React to the container directory
+# Set working directory to nginx resources directory
+WORKDIR /usr/share/nginx/html
+# Remove default nginx static resources
+RUN rm -rf ./*
+RUN apt-get install bash
+
+# Copies configuration files
 COPY ./default.conf /etc/nginx/conf.d/default.conf
+
+# Copies static resources from builder stage
+COPY --from=builder /app/build .
+
+# Containers run nginx with global directives and daemon off
 ENTRYPOINT ["nginx", "-g", "daemon off;"]

frontend/README.md

@@ -0,0 +1,70 @@
+# Getting Started with Create React App
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm start`
+
+Runs the app in the development mode.\
+Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
+
+The page will reload when you make changes.\
+You may also see any lint errors in the console.
+
+### `npm test`
+
+Launches the test runner in the interactive watch mode.\
+See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
+
+### `npm run build`
+
+Builds the app for production to the `build` folder.\
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.\
+Your app is ready to be deployed!
+
+See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
+
+### `npm run eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can't go back!**
+
+If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
+
+You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
+
+## Learn More
+
+You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
+
+To learn React, check out the [React documentation](https://reactjs.org/).
+
+### Code Splitting
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
+
+### Analyzing the Bundle Size
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
+
+### Making a Progressive Web App
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
+
+### Advanced Configuration
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
+
+### Deployment
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
+
+### `npm run build` fails to minify
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)

frontend/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "frontend",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^5.16.1",
+    "@testing-library/react": "^12.1.2",
+    "@testing-library/user-event": "^13.5.0",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2",
+    "react-scripts": "5.0.0",
+    "web-vitals": "^2.1.3"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "proxy": "http://localhost:3002",
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}

frontend/public/index.html

@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

frontend/public/manifest.json

@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

frontend/public/robots.txt

@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

frontend/src/components/app/App.css

@@ -0,0 +1,3 @@
+body {
+    background-color: #eafaf9;
+}

frontend/src/components/app/App.js

@@ -0,0 +1,32 @@
+import React, { useState, useEffect } from 'react';
+import './App.css';
+import EventList from '../eventList/EventList.js';
+
+function App(props) {
+  const [events, setEvents] = useState(['EventLog']); // initialises Event state
+  const [sse, setSse] = useState(new EventSource('/events', { withCredentials: true})) // creates eventSource listener
+  
+  useEffect(() => {
+    
+    sse.onerror = (e) => {
+      console.error();
+      sse.close();
+    }
+    
+    sse.onmessage = (e) => {
+      // parses received data from string to JSON
+      const message = JSON.parse(e.data);
+
+      // initialises a new array with updated server-side event array
+      const newEvents = [...message];
+
+      // sets the updated event array as state
+      setEvents(newEvents);
+    };
+  });
+
+  return <EventList data={events} />
+    
+}
+
+export default App;

frontend/src/components/event/Event.css

@@ -0,0 +1,18 @@
+.eventDiv {
+    background-color: aliceblue;
+    border: 2px solid #26A69A;
+    border-radius: 15px;
+    text-align: left;
+    padding: 5px;
+    max-width: fit-content;
+    font-family: apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
+    color: #092a26; 
+    margin: 7px 0px;
+}
+
+.eventPic {
+    border-radius: 15px;
+    border: 1px groove #d5f6f2;
+    max-width:100%;
+    max-height:100%;
+}

frontend/src/components/event/Event.js

@@ -0,0 +1,13 @@
+import React from "react";
+import "./Event.css";
+
+function Event(props) {
+
+    return (
+        <div className="eventDiv">
+            {props.data.picUrl? <img className="eventPic" src={props.data.picUrl}></img> : JSON.stringify(props.data)}
+        </div>
+    );
+}
+
+export default Event;

frontend/src/components/eventList/EventList.css

@@ -0,0 +1,11 @@
+.eventListUl {
+    background-color: #c1f1ec;
+    max-width: 50%;
+    padding: 5px;
+    border: 5px solid #26A69A;
+    border-radius: 5px; 
+}
+
+.eventListLi {
+    list-style: none;
+}

frontend/src/components/eventList/EventList.js

@@ -0,0 +1,18 @@
+import React from 'react';
+import Event from '../event/Event.js';
+import './EventList.css';
+
+function EventList(props) {
+    console.log(`FROM LIST: ${props.data}`);
+
+    return (
+        <ul className="eventListUl">
+            {props.data.map((event) => {
+                return <li className="eventListLi"><Event data={event} /></li>
+            })}
+        </ul>
+    )
+
+}
+
+export default EventList;

frontend/src/index.css

@@ -0,0 +1,3 @@
+body {
+
+}

frontend/src/index.js

@@ -0,0 +1,17 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './components/app/App.js';
+import reportWebVitals from './reportWebVitals';
+
+ReactDOM.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+  document.getElementById('root')
+);
+
+// If you want to start measuring performance in your app, pass a function
+// to log results (for example: reportWebVitals(console.log))
+// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
+reportWebVitals();

frontend/src/reportWebVitals.js

@@ -0,0 +1,13 @@
+const reportWebVitals = onPerfEntry => {
+  if (onPerfEntry && onPerfEntry instanceof Function) {
+    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
+      getCLS(onPerfEntry);
+      getFID(onPerfEntry);
+      getFCP(onPerfEntry);
+      getLCP(onPerfEntry);
+      getTTFB(onPerfEntry);
+    });
+  }
+};
+
+export default reportWebVitals;

frontend/src/setupTests.js

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';