added react-native demo

examples/react-native/src/extensions/asyncStorageAdapter.js

@@ -0,0 +1,75 @@
+import * as Gun from 'gun';
+import { AsyncStorage } from 'react-native';
+
+const readNode = (key, cb) => {
+	AsyncStorage.getItem(key || '', cb);
+};
+
+const read = (request, db) => {
+	const { get } = request;
+
+	const dedupid = request['#'];
+	const key = get['#'];
+	const field = get['.'];
+
+	const done = (err, data) => {
+		if (!data && !err) {
+			db.on('in', {
+				'@': dedupid,
+				put: null,
+				err: null,
+			});
+		} else {
+			db.on('in', {
+				'@': dedupid,
+				put: Gun.graph.node(data),
+				err,
+			});
+		}
+	};
+
+	const acknowledgeRet = (err, result) => {
+		if (err) {
+			done(err);
+		} else if (result === null) {
+			// Nothing found
+			done(null);
+		} else {
+			const temp = JSON.parse(result);
+			if (field) {
+				done(null, temp[field] || null);
+			} else {
+				done(null, temp);
+			}
+		}
+	};
+
+	readNode(key || '', acknowledgeRet);
+};
+
+const write = (request, db) => {
+	const { put: graph } = request;
+	const keys = Object.keys(graph);
+	const dedupid = graph['#'];
+
+	const instructions = keys.map((key) => {
+		return [key, JSON.stringify(graph[key] || {})];
+	});
+
+	AsyncStorage.multiMerge(instructions, (err) => {
+		db.on('in', {
+			'#': dedupid,
+			ok: !err || err.length === 0,
+			err,
+		});
+	});
+};
+
+// This returns a promise, it can be awaited!
+const reset = () => AsyncStorage.clear();
+
+export default {
+	read,
+	write,
+	reset,
+};