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import { UAParser } from "ua-parser-js";
export { UAParser };
import { BrowserCompatibility } from "./browserCompatibility";
export namespace BrowserHelper {
/**
* @hidden
*/
interface Browser {
name?: string;
version?: string;
}
/**
* @hidden
*/
interface CPU {
architecture?: string;
}
/**
* @hidden
*/
interface Device {
model?: string;
vendor?: string;
// tslint:disable-next-line:no-reserved-keywords
type?: string;
}
/**
* @hidden
*/
interface Engine {
name?: string;
version?: string;
}
/**
* @hidden
*/
interface OS {
name?: string;
version?: string;
}
/**
* @hidden
*/
export const userAgentInfo: {
getBrowser(): Browser;
getOS(): OS;
getEngine(): Engine;
getDevice(): Device;
getCPU(): CPU;
getUA(): string;
setUA(uastring: string): void;
} = new UAParser(navigator.userAgent);
/**
* @hidden
*/
export const canvas: HTMLCanvasElement = document.createElement("canvas");
/**
* @returns The built [[BrowserCompatibility]] object representing the current OS/Browser's support for features.
*/
export function checkBrowserCompatibility(): BrowserCompatibility {
function objectHasPropertyWithType(object: object, propertyNames: string[], propertyType: string): boolean {
// tslint:disable-next-line:no-any
const objectProperty: any = (<any>object)[propertyNames[0]];
if (objectProperty == null) {
return false;
}
if (propertyNames.length === 1) {
return typeof objectProperty === propertyType;
} else {
return (
(typeof objectProperty === "function" || typeof objectProperty === "object") &&
objectHasPropertyWithType(objectProperty, propertyNames.slice(1), propertyType)
);
}
}
function isBrokenWebAssemblyOS(os: OS): boolean {
return os.name === "iOS" && os.version != null && ["11.2.2", "11.2.5", "11.2.6"].includes(os.version);
}
let fullSupport: boolean = true;
let scannerSupport: boolean = true;
const missingFeatures: BrowserCompatibility.Feature[] = [];
if (
!objectHasPropertyWithType(navigator, ["mediaDevices", "getUserMedia"], "function") &&
!objectHasPropertyWithType(navigator, ["enumerateDevices"], "function") &&
!objectHasPropertyWithType(window, ["MediaStreamTrack", "getSources"], "function")
) {
missingFeatures.push(BrowserCompatibility.Feature.MEDIA_DEVICES);
fullSupport = false;
}
if (!objectHasPropertyWithType(window, ["Worker"], "function")) {
missingFeatures.push(BrowserCompatibility.Feature.WEB_WORKERS);
fullSupport = scannerSupport = false;
}
if (!objectHasPropertyWithType(window, ["WebAssembly"], "object")) {
missingFeatures.push(BrowserCompatibility.Feature.WEB_ASSEMBLY);
fullSupport = scannerSupport = false;
}
if (!objectHasPropertyWithType(window, ["Blob"], "function")) {
missingFeatures.push(BrowserCompatibility.Feature.BLOB);
fullSupport = scannerSupport = false;
}
if (!objectHasPropertyWithType(window, ["URL", "createObjectURL"], "function")) {
missingFeatures.push(BrowserCompatibility.Feature.URL_OBJECT);
fullSupport = scannerSupport = false;
}
if (!objectHasPropertyWithType(window, ["OffscreenCanvas"], "function")) {
missingFeatures.push(BrowserCompatibility.Feature.OFFSCREEN_CANVAS);
}
try {
if (
!objectHasPropertyWithType(window, ["WebGLRenderingContext"], "function") ||
(canvas.getContext("webgl") == null && canvas.getContext("experimental-webgl") == null)
) {
throw new Error();
}
} catch {
missingFeatures.push(BrowserCompatibility.Feature.WEBGL);
}
const userAgentOS: OS = userAgentInfo.getOS();
if (isBrokenWebAssemblyOS(userAgentOS)) {
missingFeatures.push(BrowserCompatibility.Feature.WEB_ASSEMBLY_ERROR_FREE);
fullSupport = scannerSupport = false;
}
return {
fullSupport,
scannerSupport,
missingFeatures,
};
}
/**
* @hidden
*
* Get a device id for the current browser.
*
* When available it's retrieved from localStorage, as fallback from cookies (used by older library versions),
* when not available it's randomly generated and stored in localStorage to be retrieved by later calls and returned.
*
* @returns The device id for the current browser.
*/
export function getDeviceId(): string {
const devideIdKey: string = "scandit-device-id";
let deviceId: string | undefined | null = localStorage.getItem(devideIdKey);
if (deviceId != null && deviceId !== "") {
return deviceId;
}
deviceId = Cookies.get(devideIdKey);
if (deviceId != null && deviceId !== "") {
localStorage.setItem(devideIdKey, deviceId);
return deviceId;
}
const randomDeviceIdBytes: Uint8Array = new Uint8Array(20);
crypto.getRandomValues(randomDeviceIdBytes);
deviceId = Array.from(randomDeviceIdBytes)
.map((byteNumber) => {
const byteHex: string = byteNumber.toString(16);
return byteHex.length === 1 ? /* istanbul ignore next */ `0${byteHex}` : byteHex;
})
.join("");
localStorage.setItem(devideIdKey, deviceId);
return deviceId;
}
/**
* @hidden
*
* Check if a given object is a valid HTMLElement
*
* @param object The object to check.
* @returns Whether the given object is a valid HTMLElement.
*/
// tslint:disable-next-line:no-any
export function isValidHTMLElement(object: any): boolean {
return (
object instanceof HTMLElement ||
(object != null && typeof object === "object" && typeof object.tagName === "string")
);
}
}
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