Plugins: Added joplin.versionInfo method

packages/lib/services/plugins/BasePlatformImplementation.ts

@@ -0,0 +1,50 @@
+// PlatformImplementation provides access to platform specific dependencies,
+// such as the clipboard, message dialog, etc. It allows having the same plugin
+
+import { VersionInfo } from './api/types';
+import { Implementation as WindowImplementation } from './api/JoplinWindow';
+
+export interface JoplinViewsDialogs {
+	showMessageBox(message: string): Promise<number>;
+}
+
+export interface JoplinViews {
+	dialogs: JoplinViewsDialogs;
+}
+
+export interface Joplin {
+	views: JoplinViews;
+}
+
+// API for all platforms, but with different implementations.
+export default class BasePlatformImplementation {
+
+	public get versionInfo(): VersionInfo {
+		throw new Error('Not implemented');
+	}
+
+	public get clipboard(): any {
+		throw new Error('Not implemented');
+	}
+
+	public get nativeImage(): any {
+		throw new Error('Not implemented');
+	}
+
+	public get window(): WindowImplementation {
+		throw new Error('Not implemented');
+	}
+
+	public registerComponent(_name: string, _component: any) {
+		throw new Error('Not implemented');
+	}
+
+	public unregisterComponent(_name: string) {
+		throw new Error('Not implemented');
+	}
+
+	public get joplin(): Joplin {
+		throw new Error('Not implemented');
+	}
+
+}