Added storage view, and updated the UI in general

lib/src/components/data/Storage.js

@@ -0,0 +1,58 @@
+import { Component } from 'react';
+import { AsyncStorage } from 'react-native';
+
+class Storage extends Component {
+  constructor() {
+    super();
+    this.state = {
+      data: {},
+    };
+    this.update = this.update.bind(this);
+    this.removeItem = this.removeItem.bind(this);
+    this.clear = this.clear.bind(this);
+  }
+
+  componentDidMount() {
+    this.update();
+  }
+
+  async removeItem(name) {
+    await AsyncStorage.removeItem(name);
+    await this.update();
+  }
+
+  async clear() {
+    await AsyncStorage.clear();
+    await this.update();
+  }
+
+  async update() {
+    try {
+      const keys = await AsyncStorage.getAllKeys();
+      const values = await Promise.all(keys.map(key => AsyncStorage.getItem(key)));
+      const data = {};
+      for (let i = 0; i < keys.length; i++) {
+        const key = keys[i];
+        const value = values[i];
+        data[key] = value;
+      }
+      this.setState({
+        data,
+      });
+    } catch (err) {
+      console.error(err);
+    }
+  }
+
+  render() {
+    const {
+      children,
+    } = this.props;
+    const {
+      data,
+    } = this.state;
+    return children(data, this.update, this.removeItem, this.clear);
+  }
+}
+
+export default Storage;