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{ AfterViewInit, ChangeDetectorRef, Component } from '@angular/core';\nimport { BeepService } from './beep.service';\nimport Quagga from '@ericblade/quagga2';\nimport { Article } from './article';\nimport { UpdateService } from './update.service';\nimport { environment } from '../environments/environment';\nimport { getMainBarcodeScanningCamera } from './camera-access';\nimport { HttpParams } from '@angular/common/http';\n\n//import products from '../assets/products.json';\n//import prices from '../assets/prices.json';\n\n//import products from '../assets/products-08042022.json';\n//import prices from '../assets/prices-08042022.json';\n\n//import products from '../assets/products-11172022.json';\n//import prices from '../assets/prices-11172022.json';\n\n//import products from '../assets/products-11252022.json';\n//import products from '../assets/products-12072022.json';\nimport products from '../assets/products-01162023.json';\n\nimport { Product } from './product';\nimport { Price } from './price';\n\n@Component({\n selector: 'app-root',\n templateUrl: './app.component.html',\n styleUrls: ['./app.component.scss']\n})\nexport class AppComponent implements AfterViewInit \n{\n started: boolean | undefined;\n errorMessage: string | undefined;\n acceptAnyCode = true;\n items: [Article, number][] = [];\n totalPrice: number = 0;\n productsScanned: Product[] = [];\n\n private lastScannedCode: string | undefined;\n private lastScannedCodeDate: number | undefined;\n\n private _products: Product[] = [];\n private _prices: Price[] = [];\n private _seqNumber: string | null;\n private _securityKey: string | null;\n private _callbackUrl:string | null;\n private _enableScan: boolean = true;\n\n constructor(private changeDetectorRef: ChangeDetectorRef,\n private beepService: BeepService,\n private updateService: UpdateService) \n {\n // \n {\n if (!navigator.mediaDevices || !(typeof navigator.mediaDevices.getUserMedia === 'function')) \n {\n this.errorMessage = 'getUserMedia is not supported. Please use Chrome on Android or Safari on iOS';\n this.started = false;\n return Promise.reject(this.errorMessage);\n }\n\n // enumerate devices and do some heuristics to find a suitable first camera\n return Quagga.CameraAccess.enumerateVideoDevices()\n .then(mediaDeviceInfos => {\n const mainCamera = getMainBarcodeScanningCamera(mediaDeviceInfos);\n if (mainCamera) {\n console.log(`Using ${mainCamera.label} (${mainCamera.deviceId}) as initial camera`);\n return this.initializeScannerWithDevice(mainCamera.deviceId);\n } else {\n console.error(`Unable to determine suitable camera, will fall back to default handling`);\n return this.initializeScannerWithDevice(undefined);\n }\n })\n .catch(error => {\n this.errorMessage = `Failed to enumerate devices: ${error}`;\n this.started = false;\n });\n }\n\n private initializeScannerWithDevice(preferredDeviceId: string | undefined): Promise \n {\n console.log(`Initializing Quagga scanner...`);\n\n const constraints: MediaTrackConstraints = {};\n if (preferredDeviceId) \n {\n // if we have a specific device, we select that\n constraints.deviceId = preferredDeviceId;\n } else \n {\n // otherwise we tell the browser we want a camera facing backwards (note that browser does not always care about this)\n constraints.facingMode = 'environment';\n }\n\n return Quagga.init({\n inputStream: {\n type: 'LiveStream',\n constraints,\n area: { // defines rectangle of the detection/localization area\n top: '25%', // top offset\n right: '10%', // right offset\n left: '10%', // left offset\n bottom: '25%' // bottom offset\n },\n target: document.querySelector('#scanner-container') ?? undefined\n },\n decoder: {\n readers: ['ean_reader', 'code_128_reader', 'upc_reader'],\n multiple: false\n },\n // See: https://github.com/ericblade/quagga2/blob/master/README.md#locate\n locate: false\n },\n (err) => {\n if (err) {\n console.error(`Quagga initialization failed: ${err}`);\n this.errorMessage = `Initialization error: ${err}`;\n this.started = false;\n } else {\n console.log(`Quagga initialization succeeded`);\n Quagga.start();\n this.started = true;\n this.changeDetectorRef.detectChanges();\n Quagga.onDetected((res) => {\n if (res.codeResult.code) \n { \n if (!this._enableScan) {\n return;\n }\n\n this.onBarcodeScanned(res.codeResult.code);\n }\n });\n }\n });\n }\n\n onBarcodeScanned(code: string) \n { \n // ignore duplicates for an interval of 1.5 seconds\n const now = new Date().getTime();\n\n if (code === this.lastScannedCode && ((this.lastScannedCodeDate !== undefined) && (now < this.lastScannedCodeDate + 1500))) \n {\n return;\n }\n\n let product = this._products.find(o => o.ModelNo === code || o.ModelNo === code.substring(1, code.length));\n\n if (!product) \n {\n this.errorMessage = `${code} is not valid. Please scan a valid barcode`;\n return;\n }\n\n if (this.productsScanned.findIndex(o => o == product) > -1) \n {\n this.errorMessage = `${code} is already scanned. Please scan a different barcode`;\n return;\n }\n\n let price = this._prices.find(o => o.ItemSeq === product?.Seq);\n\n product.UnitPrice = (price) ? price.Price1 : 0.0000;\n\n this.errorMessage = undefined;\n this.productsScanned.push(product);\n\n this.reditectToCallbackUrl();\n }\n \n handleCloseClickEvent(e: MouseEvent): void \n { \n if (window.confirm(`Are you sure you want to close this page?`)) \n {\n let params: HttpParams = new HttpParams()\n .set(\"seq\", this._seqNumber || \"\")\n .set(\"key\", this._securityKey || \"\")\n .set(\"items\", \"0\");\n\n window.location.href = `${decodeURIComponent(this._callbackUrl as string)}?${params.toString()}`;\n }\n }\n\n reditectToCallbackUrl(): void\n {\n this._enableScan = false;\n\n let params: HttpParams = new HttpParams()\n .set(\"seq\", this._seqNumber || \"\")\n .set(\"key\", this._securityKey || \"\")\n .set(\"items\", this.productsScanned.map(o => o.Seq).join(','));\n\n window.location.href = `${decodeURIComponent(this._callbackUrl as string)}?${params.toString()}`; \n //window.alert(`${decodeURIComponent(this._callbackUrl as string)}?${params.toString()}`);\n }\n}\n","
\n {{ errorMessage }}\n
\n\n
\n\n
\n \n
\n\n
\n This is a companion app for the blog post located here.\n The source code is available on Github.\n
\n\n
\n\n Please scan barcode\n\n
    \n
  • {{ product.ItemName}}(${{ product.UnitPrice }})
    • \n
\n\n
\n\n
\n \n
\n \n
\n","import { NgModule } from '@angular/core';\nimport { BrowserModule } from '@angular/platform-browser';\nimport { FormsModule } from '@angular/forms';\nimport { RouterModule, Routes } from '@angular/router';\nimport { ServiceWorkerModule, SwRegistrationOptions } from '@angular/service-worker';\n\nimport { AppComponent } from './app.component';\nimport { ShoppingCartItemComponent } from './shopping-cart-item/shopping-cart-item.component';\n\nimport { environment } from '../environments/environment';\n\n@NgModule({\n declarations: [\n AppComponent,\n ShoppingCartItemComponent\n ],\n imports: [\n BrowserModule,\n FormsModule,\n\n // PWA support\n ServiceWorkerModule.register('ngsw-worker.js'),\n RouterModule.forRoot([])\n ],\n providers: [\n {\n provide: SwRegistrationOptions,\n useFactory: () => {\n return {\n enabled: environment.production,\n registrationStrategy: 'registerImmediately'\n };\n }\n },\n ],\n bootstrap: [AppComponent]\n})\nexport class AppModule {\n}\n","import { Injectable } from '@angular/core';\n\n@Injectable({\n providedIn: 'root'\n})\nexport class BeepService {\n\n constructor() {\n }\n\n beep() {\n const audio = new Audio();\n audio.src = 'assets/beep.wav';\n audio.load();\n audio.play();\n }\n}\n","const environmentFacingCameraLabelStrings: string[] = [\n 'rear',\n 'back',\n 'rück',\n 'arrière',\n 'trasera',\n 'trás',\n 'traseira',\n 'posteriore',\n '后面',\n '後面',\n '背面',\n '后置', // alternative\n '後置', // alternative\n '背置', // alternative\n 'задней',\n 'الخلفية',\n '후',\n 'arka',\n 'achterzijde',\n 'หลัง',\n 'baksidan',\n 'bagside',\n 'sau',\n 'bak',\n 'tylny',\n 'takakamera',\n 'belakang',\n 'אחורית',\n 'πίσω',\n 'spate',\n 'hátsó',\n 'zadní',\n 'darrere',\n 'zadná',\n 'задня',\n 'stražnja',\n 'belakang',\n 'बैक'\n];\n\nexport function isKnownBackCameraLabel(label: string): boolean {\n const labelLowerCase = label.toLowerCase();\n return environmentFacingCameraLabelStrings.some(str => {\n return labelLowerCase.includes(str);\n });\n}\n\nexport function getMainBarcodeScanningCamera(devices: MediaDeviceInfo[]): MediaDeviceInfo | undefined {\n const backCameras = devices.filter(v => isKnownBackCameraLabel(v.label));\n const sortedBackCameras = backCameras.sort((a, b) => a.label.localeCompare(b.label));\n return sortedBackCameras.length > 0 ? sortedBackCameras[0] : undefined;\n}\n","import { Component, Input, OnInit } from '@angular/core';\nimport { Article } from '../article';\n\n@Component({\n selector: 'app-shopping-cart-item',\n templateUrl: './shopping-cart-item.component.html',\n styleUrls: ['./shopping-cart-item.component.scss']\n})\nexport class ShoppingCartItemComponent implements OnInit {\n\n constructor() {\n }\n\n @Input()\n article: Article | undefined;\n\n @Input()\n count: number | undefined;\n\n ngOnInit(): void {\n }\n\n}\n","
\n \n
{{ article.name }}
\n
{{ count }}
\n
\n","import { Injectable } from '@angular/core';\nimport { SwUpdate } from '@angular/service-worker';\n\n@Injectable({\n providedIn: 'root'\n})\nexport class UpdateService {\n\n constructor(private swUpdate: SwUpdate) {\n swUpdate.available.subscribe(event => {\n if (window.confirm(`A new update is available. Would you like to load the latest version?`)) {\n swUpdate.activateUpdate().then(() => document.location.reload());\n }\n });\n }\n\n checkForUpdates() {\n this.swUpdate.checkForUpdate();\n }\n}\n","// This file can be replaced during build by using the `fileReplacements` array.\n// `ng build` replaces `environment.ts` with `environment.prod.ts`.\n// The list of file replacements can be found in `angular.json`.\n\nexport const environment = {\n production: false\n};\n\n/*\n * For easier debugging in development mode, you can import the following file\n * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.\n *\n * This import should be commented out in production mode because it will have a negative impact\n * on performance if an error is thrown.\n */\n// import 'zone.js/plugins/zone-error'; // Included with Angular CLI.\n","import { enableProdMode } from '@angular/core';\nimport { platformBrowserDynamic } from '@angular/platform-browser-dynamic';\n\nimport { AppModule } from './app/app.module';\nimport { environment } from './environments/environment';\n\nif (environment.production) {\n enableProdMode();\n}\n\nplatformBrowserDynamic().bootstrapModule(AppModule)\n .catch(err => console.error(err));\n"],"names":[],"sourceRoot":"webpack:///"}