support for desktop versions #20

src/application/Environment/Environment.ts

@@ -0,0 +1,80 @@
+import { BrowserOsDetector } from './BrowserOs/BrowserOsDetector';
+import { IBrowserOsDetector } from './BrowserOs/IBrowserOsDetector';
+import { IEnvironment } from './IEnvironment';
+import { OperatingSystem } from './OperatingSystem';
+
+interface IEnvironmentVariables {
+    readonly window: Window & typeof globalThis;
+    readonly process: NodeJS.Process;
+    readonly navigator: Navigator;
+}
+
+export class Environment implements IEnvironment {
+    public static readonly CurrentEnvironment: IEnvironment = new Environment({
+        window,
+        process,
+        navigator,
+    });
+    public readonly isDesktop: boolean;
+    public readonly os: OperatingSystem;
+    protected constructor(
+      variables: IEnvironmentVariables,
+      browserOsDetector: IBrowserOsDetector = new BrowserOsDetector()) {
+        if (!variables) {
+            throw new Error('variables is null or empty');
+        }
+        this.isDesktop = isDesktop(variables);
+        this.os = this.isDesktop ?
+            getDesktopOsType(getProcessPlatform(variables))
+          : browserOsDetector.detect(getUserAgent(variables));
+    }
+}
+
+function getUserAgent(variables: IEnvironmentVariables): string {
+    if (!variables.window || !variables.window.navigator) {
+        return undefined;
+    }
+    return variables.window.navigator.userAgent;
+}
+
+function getProcessPlatform(variables: IEnvironmentVariables): string {
+    if (!variables.process || !variables.process.platform) {
+        return undefined;
+    }
+    return variables.process.platform;
+}
+
+function getDesktopOsType(processPlatform: string): OperatingSystem {
+    // https://nodejs.org/api/process.html#process_process_platform
+    if (processPlatform === 'darwin') {
+        return OperatingSystem.macOS;
+    } else if (processPlatform === 'win32') {
+        return OperatingSystem.Windows;
+    } else if (processPlatform === 'linux') {
+        return OperatingSystem.Linux;
+    }
+    return OperatingSystem.Unknown;
+}
+
+function isDesktop(variables: IEnvironmentVariables): boolean {
+    // More: https://github.com/electron/electron/issues/2288
+    // Renderer process
+    if (variables.window
+        && variables.window.process
+        && variables.window.process.type === 'renderer') {
+        return true;
+    }
+    // Main process
+    if (variables.process
+        && variables.process.versions
+        && Boolean(variables.process.versions.electron)) {
+        return true;
+    }
+    // Detect the user agent when the `nodeIntegration` option is set to true
+    if (variables.navigator
+        && variables.navigator.userAgent
+        && variables.navigator.userAgent.includes('Electron')) {
+        return true;
+    }
+    return false;
+}