New scanners added: Chrome + Smart Phone with JS library

booker/templates/booker/chrome_scanner.html

@@ -0,0 +1,226 @@
+{% extends "base.html" %}
+{% load static %}
+
+{% block additional_css %}
+    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/normalize.css@8.0.0/normalize.css">
+    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/milligram@1.3.0/dist/milligram.min.css">
+{% endblock %}
+
+{% block title %}Smartphone Scanner{% endblock %}
+
+{% block content %}
+    <div class="container" >
+
+        <div class="row-mb8" id="video-button-content">
+            <a class="button" id="startButton">Start</a>
+            <a class="button-outline" id="resetButton">Reset</a>
+        </div>
+        <div class="row" id="video-content">
+            <div class="col-6">
+                <video id="video" width="450" height="320" style="border: 1px solid gray"></video>
+            </div>
+
+            <div class="col-2" id="sourceSelectPanel" style="display:none">
+                <label for="sourceSelect">Change video source:</label>
+                <select id="sourceSelect" style="max-width:400px">
+                </select>
+            </div>
+
+            <div class="col-2">
+                <label>Result:</label>
+                <pre><code id="result"></code></pre>
+                <ul id="barcode-list"></ul>
+            </div>
+        </div>
+
+    </div>
+
+    <script type="text/javascript">
+    function beep() {
+        var audio = new Audio("{% static 'sound/beep.mp3' %}");
+        audio.volume = 0.1
+        console.log("Audio play {% static 'sound/beep.mp3' %}")
+        audio.play();
+    }
+
+    // check compatibility
+    if (!('BarcodeDetector' in window)) {
+      console.log('Barcode Detector is not supported by this browser.');
+    } else {
+      console.log('Barcode Detector supported!');
+
+      // create new detector
+      // var barcodeDetector = new BarcodeDetector({formats: ['code_128', 'code_39', 'code_93', 'codabar', 'data_matrix', 'ean_13', 'ean_8', 'qr_code', 'upc_a', 'upc_e']});
+      var barcodeDetector = new BarcodeDetector({formats: ['code_128', 'ean_13']});
+      console.log('Supported code formats:');
+      BarcodeDetector.getSupportedFormats().then(supportedFormats => {
+        supportedFormats.forEach(format => console.log(format));
+      });
+      console.log('end-of-format-list');
+    }
+
+    async function detect() {
+        const mediaStream = await navigator.mediaDevices.getUserMedia({
+            video: {facingMode: 'environment'}
+        });
+        const video = document.getElementById('video');
+        // const video = document.createElement('video');
+        let itemsFound = [];
+
+        video.srcObject = mediaStream;
+        video.autoplay = true;
+        const list = document.getElementById('barcode-list');
+        // list.before(video);
+
+        function render() {
+            barcodeDetector
+                .detect(video)
+                .then(barcodes => {
+                    barcodes.forEach(barcode => {
+                        if (!itemsFound.includes(barcode.rawValue)) {
+                            itemsFound.push(barcode.rawValue);
+                            const li = document.createElement('li');
+                            li.innerHTML = barcode.rawValue;
+                            list.appendChild(li);
+                            console.log('Got scan ' + barcode.rawValue);
+                        }
+                    });
+                    // beep();
+                })
+                .catch(console.error);
+        }
+
+        (function renderLoop() {
+            requestAnimationFrame(renderLoop);
+            render();
+        })();
+    }
+
+    window.addEventListener('load', function () {
+        detect();
+        document.getElementById('resetButton').addEventListener('click', () => {
+            document.getElementById('result').textContent = '';
+            codeReader.reset();
+            console.log('Reset.')
+        });
+    });
+    </script>
+
+<hr />
+<div class="row mb-3">
+    <div class="col-8">
+        <div class="input-group">
+            <input class="form-control" type="text" maxlength="40" id="container_id" placeholder="Container ID">
+            <input class="form-control" type="text" maxlength="40" id="asset_id" placeholder="Asset ID">
+        </div>
+    </div>
+    <div class="col-2">
+        <div class="input-group">
+            <input class="btn btn-primary" id="book-in-button" type="button" value="+Book">
+            <input class="btn btn-primary" id="book-out-button" type="button" value="-Book">
+        </div>
+    </div>
+    <div class="col-8">
+        <div class="input-group">
+            <textarea class="form-control" readonly="readonly" rows="4" id="container_details"></textarea>
+            <textarea class="form-control" readonly="readonly" rows="4" id="asset_details"></textarea>
+        </div>
+    </div>
+</div>
+<div class="row">
+    <div class="input-group">
+        <textarea class="form-control mb-2" id="chat-log" cols="100" rows="10"></textarea>
+        <input class="btn btn-secondary" id="clear-chat-area" type="button" value="Clear">
+    </div>
+</div>
+<script>
+    var containerIsValid = false;
+    var assetIsValid = false;
+
+    async function getContainerInfo(containerId) {
+        document.querySelector('#container_id').value = containerId;
+        url = '/api/containers?named_id=' + containerId;
+        document.querySelector('#container_details').value = 'Trying ' + url;
+        const response = await fetch(url);
+        const container = await response.json();
+        if (container.count >= 1) {
+            document.querySelector('#container_details').value = container.results[0].description;
+            containerIsValid = true;
+        } else {
+            document.querySelector('#container_details').value = document.querySelector('#container_details').value + "\nERROR: No result\n";
+            console.log(response);
+            containerIsValid = false;
+        }
+    }
+
+    async function getAssetInfo(assetId) {
+        document.querySelector('#asset_id').value = assetId;
+        url = '/api/assets?named_id=' + assetId;
+        document.querySelector('#asset_details').value = 'Trying ' + url;
+        const response = await fetch(url);
+        const asset = await response.json();
+        if (asset.count >= 1) {
+            document.querySelector('#asset_details').value = asset.results[0].description;
+            assetIsValid = true;
+        } else {
+            document.querySelector('#asset_details').value = document.querySelector('#asset_details').value + "\nERROR: No result\n";
+            console.log(response);
+            assetIsValid = false;
+        }
+    }
+
+    function useScannedText(msg) {
+        // const data = JSON.parse(e.data);
+        // msg = String(data.message);
+        document.querySelector('#chat-log').value += (msg + '\n');
+        if (msg.startsWith('C-')) {
+            getContainerInfo(data.message);
+            // document.querySelector('#container_id').value = msg;
+        } else if (msg.startsWith('A-')) {
+            getAssetInfo(data.message);
+            // document.querySelector('#asset_id').value = msg;
+        } else {
+            assetId = 'A-' + msg;
+            document.querySelector('#asset_id').value = assetId;
+            getAssetInfo(assetId);
+        }
+    };
+
+    document.querySelector('#clear-chat-area').onclick = function(e) {
+        document.querySelector('#chat-log').value = "cleared\n";
+    }
+
+    document.querySelector('#book-in-button').onclick = function(e) {
+        if (!containerIsValid) {
+            msg = 'Cannot book-in as container is invalid';
+            console.log(msg);
+            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
+            return;
+        }
+        if (!assetIsValid) {
+            msg = 'Cannot book-in as asset is invalid';
+            console.log(msg);
+            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
+            return;
+        }
+    }
+
+    document.querySelector('#book-out-button').onclick = function(e) {
+        if (!containerIsValid) {
+            msg = 'Cannot book-out as container is invalid';
+            console.log(msg);
+            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
+            return;
+        }
+        if (!assetIsValid) {
+            msg = 'Cannot book-out as asset is invalid';
+            console.log(msg);
+            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
+            return;
+        }
+    }
+
+</script>
+
+
+{% endblock %}

booker/templates/booker/index.html

@@ -56,7 +56,8 @@
     </div>
     <div class="row">
         <h1>Use your smartphone</h1>
-        <p>Use your <a class="navbar-brand" href="{% url 'booker:smartphone_scanner' %}">smartphone</a> to scan.</p>
+        <p>Use your <a href="{% url 'booker:smartphone_scanner' %}">smartphone</a> to scan.</p>
+        <p>Use your <a href="{% url 'booker:chrome_scanner' %}">chrome Barcode-Scanner to scan.</p>
     </div>
 </div>
 {% endblock %}

booker/templates/booker/smartphone_scanner.html

@@ -2,118 +2,223 @@
 {% load static %}
 
 {% block additional_css %}
-    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/normalize.css@8.0.0/normalize.css">
-    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/milligram@1.3.0/dist/milligram.min.css">
 {% endblock %}
 
 {% block title %}Smartphone Scanner{% endblock %}
 
 {% block content %}
-    <div class="container" >
+    <style>
+        #interactive canvas { position: absolute; left: 0; }
+    </style>
 
-        <div class="row-mb8" id="video-button-content">
+    <div class="container" >
-            <a class="button" id="startButton">Start</a>
+        <div class="row" id="video-button-content">
-            <a class="button-outline" id="resetButton">Reset</a>
+            <div class="col-1">
+                <a class="btn btn-primary" id="startButton">Start</a>
+            </div>
+            <div class="col-1">
+                <a class="btn btn-outline-primary" id="resetButton">Reset</a>
+            </div>
+            <div class="col-1">
+                <a class="btn btn-outline-primary" id="clearOverlayButton">Clear</a>
+            </div>
         </div>
         <div class="row" id="video-content">
-            <div class="col-6">
+            <div id="interactive" class="viewport col-12" style="position: relative;">
-                <video id="video" width="450" height="320" style="border: 1px solid gray"></video>
+                <!-- QuaggaJS will populate this element -->
             </div>
-
+            <!--
-            <div class="col-2" id="sourceSelectPanel" style="display:none">
+            <div class="col-8">
-                <label for="sourceSelect">Change video source:</label>
+                <video id="video" autoplay="true" width="640" height="480" style="border: 1px solid gray"></video>
-                <select id="sourceSelect" style="max-width:400px">
+            </div>-->
-                </select>
+        </div>
+        <div class="row" id="control-content">
+            <div class="col-6" id="sourceSelectPanel" style="display:none">
+                <div>
+                    <label for="sourceSelect">Change video source:</label>
+                    <select id="sourceSelect" style="max-width:400px"></select>
+                </div>
             </div>
-
+            <div class="col-6" id="scan-result-panel" style="display:none">
-            <div class="col-2">
+                <div>
-                <label>Result:</label>
+                    <label>Scan:</label>
-                <pre><code id="result"></code></pre>
+                    <pre><code id="result"></code></pre>
+                </div>
             </div>
         </div>
-
     </div>
 
-    <script type="text/javascript" src="https://unpkg.com/@zxing/library@latest"></script>
+
-    <script type="text/javascript">
+<script type="text/javascript" src="{% static 'quagga/dist/quagga.js' %}"></script>
-        function beep() {
+<script type="text/javascript">
-            var audio = new Audio("{% static 'sound/beep.mp3' %}");
+    function beep() {
-            audio.volume = 0.1
+        var audio = new Audio("{% static 'sound/beep.mp3' %}");
-            console.log("Audio play {% static 'sound/beep.mp3' %}")
+        audio.volume = 0.02;
-            audio.play();
+        console.log("Audio play {% static 'sound/beep.mp3' %}");
+        audio.play();
+    }
+
+    function clearCanvas() {
+        canvas = document.querySelector('#interactive .drawingBuffer');
+        drawing = (canvas != null) ? canvas.getContext('2d') : null;
+        console.log('Clearing canvas, drawing=' + drawing + ', canvas=' + canvas);
+        if (drawing != null) {
+            drawing.clearRect(0, 0, canvas.width, canvas.height);
+            console.log('Clearing done');
+        }
+    }
+
+    console.log('detected HW concurrency: ' + self.navigator.hardwareConcurrency);
+
+    window.addEventListener('load', function () {
+        let selectedDeviceId;
+        let lastScanResult = '';
+        let config = {
+            inputStream: {
+                name: "Live",
+                type: "LiveStream",
+                constraints: {
+                    facingMode: "environment",
+                },
+
+                target: document.getElementById('interactive'),
+                /*area: {
+                    top: '0%',
+                    bottom: '0%',
+                    left: '0%',
+                    right: '0%'
+                },*/
+            },
+            //numOfWorkers: 4,
+            locate: true,
+            debug: true,
+            frequency: 20,
+            decoder: {
+                readers: ["code_128_reader"],
+                debug: {
+                    drawScanline: false,
+                    drawBoundingBox: false,
+                    showPattern: false,
+                    showFrequency: false
+                },
+                multiple: false
+            },
+            locator: {
+                halfSample: false,
+                patchSize: "x-large", // x-small, small, medium, large, x-large
+                debug: {
+                    /*showCanvas: true,*/
+                    showPatches: false,
+                    showFoundPatches: false,
+                    showSkeleton: false,
+                    showLabels: false,
+                    showPatchLabels: false,
+                    showRemainingPatchLabels: false,
+                    boxFromPatches: {
+                      showTransformed: false,
+                      showTransformedBox: false,
+                      showBB: true
+                    }
+                }
+            }
+        };
+
+        function quagga_init() {
+            Quagga.init(config, function(err) {
+                if (err) {
+                    console.log(err);
+                    return;
+                }
+                console.log("Initialization finished. Ready to start");
+                Quagga.start();
+                Quagga.onDetected(function(data) {
+                    code = data.codeResult.code;
+                    console.log('Got scan: ' + code);
+                    if (code && lastScanResult !== code) {
+                        lastScanResult = code;
+                        console.log('Got scan (cont.): ' + lastScanResult);
+                        document.querySelector('#result').textContent = lastScanResult;
+                        // document.getElementById('result').textContent = lastScanResult
+                        beep();
+                        useScannedText(lastScanResult);
+                        console.log(data);
+                        canvas = document.querySelector('#interactive .drawingBuffer');
+                        drawing = canvas.getContext('2d');
+                        drawing.clearRect(0, 0, canvas.width, canvas.height);
+                        drawing.beginPath();
+                        drawing.moveTo(data.line[0].x, data.line[0].y);
+                        drawing.lineTo(data.line[1].x, data.line[1].y);
+                        drawing.lineWidth = 2;
+                        drawing.strokeStyle = 'yellow';
+                        drawing.closePath();
+                        drawing.stroke();
+                        setTimeout(clearCanvas, 3000);
+                    } else if (code) {
+                        console.log('... scan again');
+                    }
+                });
+                /*
+                Quagga.onProcessed(function(data) {
+                    canvas = document.querySelector('#interactive .drawingBuffer');
+                    if (canvas != null) {
+                        context = canvas.getContext('2d');
+                        if (context) {
+                            context.clearRect(0, 0, canvas.width, canvas.height);
+                        }
+                    }
+                });*/
+            });
         }
 
-        window.addEventListener('load', function () {
+        quagga_init();
-            let selectedDeviceId;
-            let lastScanResult = '';
-            // const codeReader = new ZXing.BrowserBarcodeReader()
-            const codeReader = new ZXing.BrowserMultiFormatReader()
-            console.log('ZXing code reader initialized')
-            codeReader.getVideoInputDevices()
-                .then((videoInputDevices) => {
-                    const sourceSelect = document.getElementById('sourceSelect')
-                    selectedDeviceId = videoInputDevices[0].deviceId
-                    if (videoInputDevices.length > 1) {
-                        videoInputDevices.forEach((element) => {
-                            const sourceOption = document.createElement('option')
-                            sourceOption.text = element.label
-                            sourceOption.value = element.deviceId
-                            sourceSelect.appendChild(sourceOption)
-                        })
 
-                        sourceSelect.onchange = () => {
+        if (!navigator.mediaDevices || !navigator.mediaDevices.enumerateDevices) {
-                            selectedDeviceId = sourceSelect.value;
+          console.log("enumerateDevices() not supported.");
-                        }
+          return;
-
+        }
-                        const sourceSelectPanel = document.getElementById('sourceSelectPanel')
+        Quagga.CameraAccess.enumerateVideoDevices()
-                        sourceSelectPanel.style.display = 'block'
+            .then(function(devices) {
+                const sourceSelect = document.getElementById('sourceSelect');
+                selectedDeviceId = devices[0].deviceId; // default
+                if (devices.length > 1) {
+                    devices.forEach(function(device) {
+                        console.log(device.kind + ": " + device.label + " id=" + device.deviceId);
+                        const sourceOption = document.createElement('option');
+                        sourceOption.text = device.label;
+                        sourceOption.value = device.deviceId;
+                        sourceSelect.appendChild(sourceOption);
+                    });
+                    sourceSelect.onchange = () => {
+                        selectedDeviceId = sourceSelect.value;
+                        config.inputStream.constraints.deviceId = selectedDeviceId;
+                        Quagga.stop();
+                        quagga_init();
                     }
-
+                    const sourceSelectPanel = document.getElementById('sourceSelectPanel');
-                    document.getElementById('startButton').addEventListener('click', () => {
+                    sourceSelectPanel.style.display = 'block';
-                        beep()
+                }
-                        codeReader.decodeFromInputVideoDeviceContinuously(selectedDeviceId, 'video', (result) => {
+                document.getElementById('startButton').addEventListener('click', () => {
-                            if (result && lastScanResult !== result.text) {
+                    beep();
-                                lastScanResult = result.text
+                    Quagga.start();
-                                console.log('Got scan (cont.): ' + result)
+                    console.log(`Started scan from camera with id ${selectedDeviceId}`)
-                                document.getElementById('result').textContent = result.text
-                                beep()
-                                useScannedText(result.text)
-                            } else if (result) {
-                                console.log('... scan again')
-                            }
-                        });
-
-                        /*
-                        codeReader.decodeOnceFromVideoDevice(selectedDeviceId, 'video').then((result) => {
-                            if (lastScanResult !== result.text) {
-                                lastScanResult = result.text
-                                console.log('Got scan: ' + result.text)
-                                document.getElementById('result').textContent = result.text
-                                useScannedText(result.text)
-                            } else {
-                                console.log('... scan again')
-                            }
-                        }).catch((err) => {
-                            console.error(err)
-                            document.getElementById('result').textContent = err
-                        })
-                        */
-                        console.log(`Started continous decode from camera with id ${selectedDeviceId}`)
-                    })
-
-                    document.getElementById('resetButton').addEventListener('click', () => {
-                        document.getElementById('result').textContent = '';
-                        codeReader.reset();
-                        console.log('Reset.')
-                    })
-
                 })
-                .catch((err) => {
-                    console.error(err)
-                })
-        })
-    </script>
 
+                document.getElementById('resetButton').addEventListener('click', () => {
+                    document.getElementById('result').textContent = '';
+                    Quagga.stop();
+                    console.log('Reset/stopped.')
+                })
+
+                document.getElementById('clearOverlayButton').addEventListener('click', () => {
+                    clearCanvas();
+                })
+            })
+            .catch(function(err) {
+              console.log(err);
+            });
+
+    });
+</script>
 <hr />
 <div class="row mb-3">
     <div class="col-8">
@@ -145,14 +250,22 @@
     var containerIsValid = false;
     var assetIsValid = false;
 
+    async function getObjectInfo(url) {
+        const response = await fetch(url);
+        const object_json = response.json();
+        return object_json;
+    }
+
     async function getContainerInfo(containerId) {
         document.querySelector('#container_id').value = containerId;
         url = '/api/containers?named_id=' + containerId;
         document.querySelector('#container_details').value = 'Trying ' + url;
-        const response = await fetch(url);
+        const container = await getObjectInfo(url);
-        const container = await response.json();
         if (container.count >= 1) {
-            document.querySelector('#container_details').value = container.results[0].description;
+            c = container.results[0];
+            console.log(c);
+            containerType = await getObjectInfo(c.container_type);
+            document.querySelector('#container_details').value = c.description + "\n" + c.named_id + ': ' + c.color + "\n" + containerType.description;
             containerIsValid = true;
         } else {
             document.querySelector('#container_details').value = document.querySelector('#container_details').value + "\nERROR: No result\n";
@@ -178,15 +291,11 @@
     }
 
     function useScannedText(msg) {
-        // const data = JSON.parse(e.data);
-        // msg = String(data.message);
         document.querySelector('#chat-log').value += (msg + '\n');
         if (msg.startsWith('C-')) {
-            getContainerInfo(data.message);
+            getContainerInfo(msg);
-            // document.querySelector('#container_id').value = msg;
         } else if (msg.startsWith('A-')) {
-            getAssetInfo(data.message);
+            getAssetInfo(msg);
-            // document.querySelector('#asset_id').value = msg;
         } else {
             assetId = 'A-' + msg;
             document.querySelector('#asset_id').value = assetId;

booker/urls.py

@@ -6,5 +6,7 @@ app_name = 'booker'
 urlpatterns = [
     path('', views.IndexView.as_view(), name='index'),
     path('smartphone_scanner/', views.SmartphoneScannerView.as_view(), name='smartphone_scanner'),
-    path('<str:scanner_id>/', views.scanner, name='scanner')
+    path('chrome_scanner/', views.ChromeScannerView.as_view(), name='chrome_scanner'),
+    path('<str:scanner_id>/', views.scanner_view, name='scanner'),
+    path('webscanner/<str:scanner_id>/', views.web_scanner_view, name='web_scanner'),
 ]

booker/views.py

@@ -1,6 +1,18 @@
+from datetime import datetime
+from channels.layers import get_channel_layer
 from django.shortcuts import render
+from django.views.decorators.csrf import csrf_exempt
 from django.views.generic import ListView, TemplateView
+from gmqtt import Client
+from rest_framework.utils import json
+
+from homelog import settings
+from homelog.system_user import get_system_user
 from .models import Scanner
+from django.http import HttpResponse
+import logging
+
+LOGGER = logging.getLogger(__name__)
 
 
 class IndexView(ListView):
@@ -8,10 +20,53 @@ class IndexView(ListView):
     template_name = 'booker/index.html'
 
 
-def scanner(request, scanner_id):
+def scanner_view(request, scanner_id):
     return render(request, 'booker/scanner.html', {
         'scanner_id': scanner_id
     })
 
+
 class SmartphoneScannerView(TemplateView):
     template_name = 'booker/smartphone_scanner.html'
+
+
+class ChromeScannerView(TemplateView):
+    template_name = 'booker/chrome_scanner.html'
+
+
+@csrf_exempt
+def web_scanner_view(request, scanner_id):
+    def get_or_create_scanner(named_id):
+        scanner, created = Scanner.objects.get_or_create(named_id=named_id, defaults={
+            # 'lwt_topic': topic,
+            'description': 'WebAPI scanner',
+            'last_online_ts': datetime.now(),
+            'created_by': get_system_user(),
+            'changed_by': get_system_user()
+        })
+        if created:
+            LOGGER.debug(f"Created new scanner entry for {named_id}")
+        else:
+            LOGGER.debug(f"Updated scanner entry for {named_id}")
+        return scanner
+
+    print(f"Got {request.POST['scan']} from scanner {scanner_id}")
+    get_or_create_scanner(scanner_id)
+    topic = f"barcodescanner/{scanner_id}/scan"
+    '''
+    client = Client('homelog-webscanner')
+    client.set_auth_credentials(username=settings.MQTT_USER, password=settings.MQTT_PASSWORD)
+    
+    client.connect(settings.MQTT_HOST, 1883, keepalive=60, version=settings.MQTT_VERSION)
+    client.publish(topic, request.POST['scan'])
+    client.disconnect()
+    # MqttConsumer().mqtt_publish({'topic': topic, 'payload': request.POST['scan'], 'retain': False})
+    '''
+    channel_layer = get_channel_layer()
+    channel_layer.group_send(
+        'mqtt', # scanner_id,
+        {"type": "distribute", "text": json.dumps({'message': request.POST['scan'], 'topic': topic})}
+    )
+    '''
+    '''
+    return HttpResponse(f"<html><body><p>OK, got {request.POST['scan']} from {scanner_id}</p></body></html>")