support for desktop versions #20

src/application/Environment/BrowserOs/BrowserOsDetector.ts

@@ -0,0 +1,54 @@
+import { OperatingSystem } from '../OperatingSystem';
+import { DetectorBuilder } from './DetectorBuilder';
+import { IBrowserOsDetector } from './IBrowserOsDetector';
+
+export class BrowserOsDetector implements IBrowserOsDetector {
+    private readonly detectors = BrowserDetectors;
+    public detect(userAgent: string): OperatingSystem {
+        if (!userAgent) {
+            return OperatingSystem.Unknown;
+        }
+        for (const detector of this.detectors) {
+            const os = detector.detect(userAgent);
+            if (os !== OperatingSystem.Unknown) {
+                return os;
+            }
+        }
+        return OperatingSystem.Unknown;
+    }
+}
+
+// Reference: https://github.com/keithws/browser-report/blob/master/index.js#L304
+const BrowserDetectors =
+[
+    define(OperatingSystem.KaiOS, (b) =>
+        b.mustInclude('KAIOS')),
+    define(OperatingSystem.ChromeOS, (b) =>
+        b.mustInclude('CrOS')),
+    define(OperatingSystem.BlackBerryOS, (b) =>
+        b.mustInclude('BlackBerry')),
+    define(OperatingSystem.BlackBerryTabletOS, (b) =>
+        b.mustInclude('RIM Tablet OS')),
+    define(OperatingSystem.BlackBerry, (b) =>
+        b.mustInclude('BB10')),
+    define(OperatingSystem.Android, (b) =>
+        b.mustInclude('Android').mustNotInclude('Windows Phone')),
+    define(OperatingSystem.Android, (b) =>
+        b.mustInclude('Adr').mustNotInclude('Windows Phone')),
+    define(OperatingSystem.iOS, (b) =>
+        b.mustInclude('like Mac OS X')),
+    define(OperatingSystem.Linux, (b) =>
+        b.mustInclude('Linux').mustNotInclude('Android').mustNotInclude('Adr')),
+    define(OperatingSystem.Windows, (b) =>
+        b.mustInclude('Windows').mustNotInclude('Windows Phone')),
+    define(OperatingSystem.WindowsPhone, (b) =>
+        b.mustInclude('Windows Phone')),
+    define(OperatingSystem.macOS, (b) =>
+        b.mustInclude('OS X').mustNotInclude('Android').mustNotInclude('like Mac OS X')),
+];
+
+function define(os: OperatingSystem, applyRules: (builder: DetectorBuilder) => DetectorBuilder): IBrowserOsDetector {
+    const builder = new DetectorBuilder(os);
+    applyRules(builder);
+    return builder.build();
+}

src/application/Environment/BrowserOs/DetectorBuilder.ts

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+import { IBrowserOsDetector } from './IBrowserOsDetector';
+import { OperatingSystem } from '../OperatingSystem';
+
+export class DetectorBuilder {
+    private readonly existingPartsInUserAgent = new Array<string>();
+    private readonly notExistingPartsInUserAgent = new Array<string>();
+
+    constructor(private readonly os: OperatingSystem) { }
+
+    public mustInclude(str: string): DetectorBuilder {
+        if (!str) {
+            throw new Error('part to include is empty or undefined');
+        }
+        this.existingPartsInUserAgent.push(str);
+        return this;
+    }
+
+    public mustNotInclude(str: string): DetectorBuilder {
+        if (!str) {
+            throw new Error('part to not include is empty or undefined');
+        }
+        this.notExistingPartsInUserAgent.push(str);
+        return this;
+    }
+
+    public build(): IBrowserOsDetector {
+        if (!this.existingPartsInUserAgent.length) {
+            throw new Error('Must include at least a part');
+        }
+        return {
+            detect: (userAgent) => {
+                if (!userAgent) {
+                    throw new Error('User agent is null or undefined');
+                }
+                for (const exitingPart of this.existingPartsInUserAgent) {
+                    if (!userAgent.includes(exitingPart)) {
+                        return OperatingSystem.Unknown;
+                    }
+                }
+                for (const notExistingPart of this.notExistingPartsInUserAgent) {
+                    if (userAgent.includes(notExistingPart)) {
+                        return OperatingSystem.Unknown;
+                    }
+                }
+                return this.os;
+            },
+        };
+    }
+}

src/application/Environment/BrowserOs/IBrowserOsDetector.ts

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+import { OperatingSystem } from '../OperatingSystem';
+
+export interface IBrowserOsDetector {
+    detect(userAgent: string): OperatingSystem;
+}