Initial commit

This commit is contained in:
Thomas Forgione 2023-02-23 11:56:58 +01:00
commit 51fc44a60c
6 changed files with 938 additions and 0 deletions

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node_modules
static/videos

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14
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{
"name": "annotator",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"dependencies": {
"express": "^4.18.2"
}
}

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const fs = require('fs').promises;
async function main() {
// Imports et constantes.
const fs = require('fs').promises;
const express = require('express');
const bodyParser = require('body-parser')
const ip = '127.0.0.1';
const port = 8000;
const app = express();
let id = 1;
// Permet de récupérer les données venant du client.
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
// Page d'accueil.
app.get('/', async function(req, res) {
let body = '<!doctype HTML>\n';
body += '<html>\n';
body += ' <head>\n';
body += ' <meta charset="utf-8">\n';
body += ' <style>\n';
body += ' * {\n';
body += ' font-family: sans-serif;\n';
body += ' }\n';
body += ' </style>\n';
body += ' </head>\n';
body += ' <body>\n';
let dir = null;
try {
dir = await fs.readdir('static/videos');
} catch (e) {
body += ' <h1>Please put your videos as jpg files in </h1>\n';
}
if (dir !== null) {
body += ' <h1>Available videos to annotate:</h1>\n';
body += ' <ul>\n';
for (let video of dir) {
body += ' <li>\n';
body += ' <a href="/annotator?root=/static/videos/' + video + '">' + video + '</a>\n';
}
body += ' </ul>\n';
}
body += ' </body>\n';
body += '</html>\n';
res.send(body);
});
// Page d'annotation.
app.get('/annotator', async function(req, res) {
const root = req.query.root.slice(1);
if (root.startsWith('/') || root.indexOf('..') !== -1) {
res.status(400);
return res.send('Root is invalid');
}
let annotations = null;
try {
// Try to read and parse annotations
annotions = JSON.parse(await fs.readFile(root + '/annotations.json', 'utf-8'));
} catch (e) {
console.log(e);
// Create default empty annotation file
annotations = {};
let dir = null;
try {
dir = await fs.readdir(root);
} catch (e) {
res.status(400);
res.send('Root does not exist');
}
for (let frame of dir) {
if (frame === "annotations.json") {
continue;
}
annotations[frame.split(".")[0]] = [];
}
await fs.writeFile(root + '/annotations.json', JSON.stringify(annotations, undefined, 4));
}
// On envoie le contenu du fichier index.html.
return res.sendFile(__dirname + '/static/annotator.html');
});
// Route pour envoyer les données d'annotation.
app.post('/data', async function(req, res) {
let root = req.body.root.slice(1);
if (root.startsWith('/') || root.indexOf('..') !== -1) {
res.status(400);
return res.send('Root is invalid');
}
try {
await fs.writeFile(root + '/annotations.json', JSON.stringify(req.body.annotations, undefined, 4));
} catch (e) {
res.status(400);
return res.send('' + e);
}
return res.send('Ok');
});
// Envoi des fichiers statiques.
app.use('/static', express.static('static'))
// On démarre le serveur, puis on peut y accéder dans le navigateur en allant sur http://localhost:8000
app.listen(port, ip, function() {
console.log('Started listening on ' + port);
});
}
main();

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<!doctype HTML>
<html>
<head>
<meta charset="utf-8">
<style>
* {
font-family: sans-serif;
}
.centered {
margin-left: auto;
margin-right: auto;
text-align: center;
}
.column {
float: left;
width: 50%;
padding: 10px;
box-sizing: border-box;
}
.row:after {
content: "";
display: table;
clear: both;
}
img {
max-width: 100%;
max-height: 100%;
}
#annotations {
margin-left: 20px;
}
</style>
</head>
<body>
<h1 class="centered">Annotator</h1>
<div class="row">
<div class="column">
<h2 class="centered">Previous frame (<span id="img-1-index">1</span>)</h2>
<img id="img-1">
</div>
<div class="column">
<h2 class="centered">Current frame (<span id="img-2-index">2</span>)</h2>
<img id="img-2">
<h3>Annotations:</h3>
<div id="annotations">
</div>
</div>
</div>
<script src="/static/main.js"></script>
</body>
</html>

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function findGetParameter(parameterName) {
var result = null, tmp = [];
location.search
.substr(1)
.split("&")
.forEach(function(item) {
tmp = item.split("=");
if (tmp[0] === parameterName) result = decodeURIComponent(tmp[1]);
});
return result;
}
const Events = [
'Transition -> slide',
'Transition -> demo',
'Transition -> new viewpoint',
'Build Up',
'Animation',
'Pointer',
'Live annotation',
];
class Annotator {
constructor(root, annotations, img1Id, img2Id, annotationId) {
this.root = root;
this.annotations = annotations;
this.maxIndex = Object.keys(this.annotations).length - 1;
this.img1Element = document.getElementById(img1Id);
this.img1IndexElement = document.getElementById(img1Id + '-index');
this.img2Element = document.getElementById(img2Id);
this.img2IndexElement = document.getElementById(img2Id + '-index');
this.annotationElement = document.getElementById(annotationId);
this.setIndex(0);
this.addShortcuts();
}
formatIndex(index) {
index += '';
return index.padStart(4, '0');
}
getUrl(index) {
return this.root + '/' + this.formatIndex(index) + '.jpg';
}
setIndex(index) {
// If index is undefined, we only want a refresh
if (index !== undefined) {
this.index = index;
this.index = Math.max(0, this.index);
this.index = Math.min(this.index, this.maxIndex);
// Refrsh images
this.img1Element.src = this.getUrl(this.index);
this.img2Element.src = this.getUrl(this.index + 1);
// Refresh headers
this.img1IndexElement.innerHTML = this.index + '/' + this.maxIndex;
this.img2IndexElement.innerHTML = this.index + 1 + '/' + this.maxIndex;
}
// Refresh annotations list
let currentAnnotations = this.annotations[this.formatIndex(this.index + 1)];
if (currentAnnotations.length === 0) {
this.annotationElement.innerHTML = "There is no annotation for this frame";
} else {
this.annotationElement.innerHTML = '<ul>';
for (let annotation of currentAnnotations) {
this.annotationElement.innerHTML += '<li>' + annotation + '</li>';
}
this.annotationElement.innerHTML += '</ul>';
}
}
increment(by = 1) {
this.setIndex(this.index + by);
}
decrement(by = 1) {
this.setIndex(this.index - by);
}
addShortcuts() {
document.addEventListener('keyup', (e) => {
switch (e.code) {
case 'ArrowRight': this.increment(e.ctrlKey ? 10 : 1); break;
case 'ArrowLeft': this.decrement(e.ctrlKey ? 10 : 1); break;
}
if (e.code.startsWith('Numpad') || e.code.startsWith('Digit')) {
let key = parseInt(e.code[e.code.length - 1], 10);
this.toggle(key);
}
});
}
toggle(key) {
let event = Events[key];
if (event === undefined) {
return;
}
let events = this.annotations[this.formatIndex(this.index + 1)];
let search = events.indexOf(event);
if (search === -1) {
events.push(event);
} else {
events.splice(search, 1);
}
this.setIndex();
this.sync();
}
sync() {
fetch('/data', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
root: this.root,
annotations: this.annotations,
}),
});
}
}
async function main() {
const root = findGetParameter('root');
let annotations = await fetch(root + '/annotations.json');
annotations = await annotations.json();
const annotator = new Annotator(root, annotations, 'img-1', 'img-2', 'annotations');
}
main();