Add remote signature pad (close #11)
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/*
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Copyright 2021 Netsyms Technologies.
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/*
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Created on : Jul 17, 2021, 12:29:13 PM
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Author : Skylar Ittner
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*/
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select option {
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color: var(--bs-dark);
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}
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.alert {
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color: var(--bs-dark);
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}
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.theme-purple {
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background-image: linear-gradient(90deg,#33b7e2,#5e62b0,#dc307c);
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}
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.theme-green {
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background-image: linear-gradient(90deg, #9ebd13 0%, #008552 100%);
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}
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.theme-red {
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background-image: linear-gradient(90deg, #d53369 0%, #daae51 100%);
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}
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.theme-aqua {
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background-image: linear-gradient(90deg, #00d2ff 0%, #3a47d5 100%);
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}
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.theme-ocean {
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background-image: linear-gradient(90deg, #1CB5E0 0%, #000851 100%);
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}
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.theme-dusty {
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background-image: linear-gradient(90deg, #fcff9e 0%, #c67700 100%);
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}
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.theme-lilac {
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background-image: linear-gradient(90deg, #efd5ff 0%, #515ada 100%);
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}
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.theme-spring {
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background-image: linear-gradient(90deg, #00C9FF 0%, #92FE9D 100%);
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}
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.theme-shadow {
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background-image: linear-gradient(90deg, #4b6cb7 0%, #182848 100%);
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}
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/*
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* Copyright 2021 Netsyms Technologies.
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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const http_port = 36744; // dialed ENSIG on phone keypad (eNotary Signature)
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var http = require('http');
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var server = http.createServer(function (req, res) {
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res.setHeader('Access-Control-Allow-Origin', '*');
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res.setHeader('Access-Control-Allow-Methods', 'GET, POST');
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if (req.method == "GET") {
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console.log("Serving " + req.url);
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switch (req.url) {
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case "/":
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res.writeHead(200, {'Content-Type': 'text/html'});
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var index = getFileAsString("./sigserver/index.html");
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index = index.replace("theme-BLANK", "theme-" + getStorage("color_theme"));
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res.end(index);
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break;
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case "/bootstrap.min.css":
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res.writeHead(200, {'Content-Type': 'text/css'});
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res.end(getFileAsString("./css/bootstrap.min.css"));
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break;
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case "/theme.css":
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res.writeHead(200, {'Content-Type': 'text/css'});
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res.end(getFileAsString("./css/theme.css"));
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break;
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case "/fontawesome/all.min.js":
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res.writeHead(200, {'Content-Type': 'text/javascript'});
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res.end(getFileAsString("./node_modules/@fortawesome/fontawesome-free/js/all.min.js"));
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break;
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case "/signature_pad.umd.min.js":
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res.writeHead(200, {'Content-Type': 'text/javascript'});
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res.end(getFileAsString("./node_modules/signature_pad/dist/signature_pad.umd.min.js"));
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break;
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case "/img/signature-line.svg":
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res.writeHead(200, {'Content-Type': 'image/svg+xml'});
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res.end(getFileAsString("./img/signature-line.svg"));
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break;
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default:
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res.writeHead(404);
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res.end("404 not found.");
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}
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} else if (req.method == "POST") {
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var body = '';
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req.on('data', function (data) {
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body += data;
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});
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req.on('end', function () {
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handleRemoteSignatureData(JSON.parse(body));
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});
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res.writeHead(201);
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}
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});
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server.listen(http_port); //3 - listen for any incoming requests
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console.log('Signature collection pad service running on port ' + http_port + '.');
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function getSignatureServerUrl() {
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const prepareUrls = require('local-ip-url/prepareUrls');
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var urls = prepareUrls({
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protocol: 'http',
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host: '0.0.0.0',
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port: http_port
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});
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return urls.lanUrl;
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}
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<!DOCTYPE html>
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<!--
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Copyright 2021 Netsyms Technologies.
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/.
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-->
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<html>
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<head>
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<title>Signature Pad</title>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link rel="stylesheet" href="bootstrap.min.css" />
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<link rel="stylesheet" href="theme.css" />
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<script src="fontawesome/all.min.js"></script>
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<script src="signature_pad.umd.min.js"></script>
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<style>
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.signature-wrapper {
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background-color: transparent;
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background-image: linear-gradient(125deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.2) 70%);
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box-shadow: inset 1px 1px rgba(255, 255, 255, 0.2), inset -1px -1px rgba(255, 255, 255, 0.1), 1px 3px 24px -1px rgba(0, 0, 0, 0.15);
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border-radius: 0 0 0.5rem 0.5rem;
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position: relative;
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width: 100%;
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height: 100%;
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margin: 0 auto;
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/* fix bug on iOS where image sticks out right side and makes entire page scroll horiz. */
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overflow: hidden;
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user-select: none;
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}
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.signature-wrapper img {
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position: absolute;
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bottom: 0;
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left: 0;
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}
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.signature-wrapper canvas {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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}
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</style>
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</head>
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<body class="theme-BLANK">
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<div class="card" style="width: calc(100vw - 1rem); height: calc(100vh - 1rem); margin: 0.5rem;">
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<div class="card-header d-flex justify-content-between align-items-center">
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<h6 class="card-title mb-0">Signature Pad</h6>
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<div class="btn btn-warning btn-sm" onclick="resizeSignaturePadCanvas();signaturePad.clear();"><i class="fas fa-eraser"></i> Erase</div>
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<div class="btn btn-primary btn-sm" onclick="signaturePadUndo();"><i class="fas fa-undo"></i> Undo</div>
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<div class="btn btn-success btn-sm" onclick="sendSignature();"><i class="fas fa-check"></i> Done</div>
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</div>
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<div class="card-body p-0">
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<div class="signature-wrapper">
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<img src="img/signature-line.svg" />
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<canvas id="signaturecanvas"></canvas>
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</div>
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</div>
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</div>
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<script>
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var signaturePad = null;
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function initSignaturePad() {
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var canvas = document.getElementById("signaturecanvas");
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signaturePad = new SignaturePad(canvas, {
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backgroundColor: 'rgba(255, 255, 255, 0.5)'
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});
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resizeSignaturePadCanvas();
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}
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function resizeSignaturePadCanvas() {
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var canvas = document.getElementById("signaturecanvas");
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var ratio = Math.max(window.devicePixelRatio || 1, 1);
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canvas.width = canvas.offsetWidth * ratio;
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canvas.height = canvas.offsetHeight * ratio;
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canvas.getContext("2d").scale(ratio, ratio);
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if (signaturePad != null) {
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signaturePad.clear(); // otherwise isEmpty() might return incorrect value
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}
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}
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function signaturePadUndo() {
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var data = signaturePad.toData();
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resizeSignaturePadCanvas();
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if (data) {
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data.pop(); // remove the last dot or line
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signaturePad.fromData(data);
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}
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}
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function sendSignature() {
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var signature = signaturePad.toData();
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var xhttp = new XMLHttpRequest();
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xhttp.open("POST", "/", true);
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xhttp.send(JSON.stringify(signature));
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}
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window.addEventListener('load', function () {
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initSignaturePad();
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});
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window.addEventListener('resize', function () {
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resizeSignaturePadCanvas();
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});
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window.addEventListener('orientationchange', function () {
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resizeSignaturePadCanvas();
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});
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</script>
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</body>
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</html>
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