feat: Initial clean release of CHM

packages/app-mobile/utils/ShareExtension.ts

@@ -0,0 +1,41 @@
+import { NativeEventEmitter } from 'react-native';
+import { NativeModules, Platform } from 'react-native';
+
+export interface SharedData {
+	title?: string;
+	text?: string;
+	resources?: string[];
+}
+
+type ShareListener = (event: SharedData)=> void;
+export type UnsubscribeShareListener = ()=> void;
+type ShareExtensionType = {
+	data: ()=> Promise<SharedData>;
+	close: ()=> void;
+	shareURL: ()=> string;
+	addShareListener: (listener: ShareListener)=> UnsubscribeShareListener|undefined;
+};
+
+
+let eventEmitter: NativeEventEmitter | undefined;
+
+const ShareExtension: ShareExtensionType = (NativeModules.ShareExtension) ?
+	{
+		data: () => NativeModules.ShareExtension.data(),
+		close: () => NativeModules.ShareExtension.close(),
+		shareURL: (Platform.OS === 'ios') ? NativeModules.ShareExtension.getConstants().SHARE_EXTENSION_SHARE_URL : '',
+		addShareListener: (Platform.OS === 'android') ? ((handler) => {
+			if (!eventEmitter) {
+				eventEmitter = new NativeEventEmitter(NativeModules.ShareExtension);
+			}
+			return eventEmitter.addListener('new_share_intent', handler).remove;
+		}) : (() => undefined),
+	} :
+	{
+		data: () => {},
+		close: () => {},
+		shareURL: '',
+		addShareListener: () => undefined,
+	};
+
+export default ShareExtension;