Update app.py

Author: KOSASIH

mobile_app/app.py

@@ -1,33 +1,101 @@
 import React, { useState, useEffect } from "react";
-import { View, Text, Button } from "react-native";
+import { View, Text, Button, StyleSheet, ActivityIndicator, Alert } from "react-native";
 import { MarketData } from "../market_data";
 import { RiskManager } from "../risk_management";
+import PushNotification from "react-native-push-notification";
 
 const App = () => {
-  const [tradingPerformance, setTradingPerformance] = useState({});
-  const [customizableDashboard, setCustomizableDashboard] = useState({});
+  const [tradingPerformance, setTradingPerformance] = useState(null);
+  const [customizableDashboard, setCustomizableDashboard] = useState(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(null);
 
   useEffect(() => {
     const marketData = new MarketData();
-    const riskManager = new RiskManager(marketData, positionSize=1000, riskRewardRatio=2);
+    const riskManager = new RiskManager(marketData, 1000, 2);
 
-    marketData.getTradingPerformance().then(data => setTradingPerformance(data));
-    marketData.getCustomizableDashboard().then(data => setCustomizableDashboard(data));
+    const fetchData = async () => {
+      try {
+        const performanceData = await marketData.getTradingPerformance();
+        setTradingPerformance(performanceData);
+        
+        const dashboardData = await marketData.getCustomizableDashboard();
+        setCustomizableDashboard(dashboardData);
+      } catch (err) {
+        setError("Failed to fetch data. Please try again later.");
+        console.error(err);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    fetchData();
   }, []);
 
   const handlePushNotification = () => {
-    // Implement push notification logic here
+    PushNotification.localNotification({
+      title: "Trading Alert",
+      message: "Check your trading performance!",
+      playSound: true,
+      soundName: "default",
+    });
+    Alert.alert("Notification Sent", "Your push notification has been sent!");
   };
 
+  if (loading) {
+    return (
+      <View style={styles.loadingContainer}>
+        <ActivityIndicator size="large" color="#0000ff" />
+        <Text>Loading...</Text>
+      </View>
+    );
+  }
+
+  if (error) {
+    return (
+      <View style={styles.errorContainer}>
+        <Text style={styles.errorText}>{error}</Text>
+      </View>
+    );
+  }
+
   return (
-    <View>
-      <Text>Trading Performance:</Text>
+    <View style={styles.container}>
+      <Text style={styles.title}>Trading Performance:</Text>
       <Text>{tradingPerformance.metrics}</Text>
-      <Text>Customizable Dashboard:</Text>
+      <Text style={styles.title}>Customizable Dashboard:</Text>
       <Text>{customizableDashboard.data}</Text>
       <Button title="Send Push Notification" onPress={handlePushNotification} />
     </View>
   );
 };
 
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    padding: 20,
+    justifyContent: "center",
+    alignItems: "center",
+  },
+  title: {
+    fontSize: 20,
+    fontWeight: "bold",
+    marginVertical: 10,
+  },
+  loadingContainer: {
+    flex: 1,
+    justifyContent: "center",
+    alignItems: "center",
+  },
+  errorContainer: {
+    flex: 1,
+    justifyContent: "center",
+    alignItems: "center",
+  },
+  errorText: {
+    color: "red",
+    fontSize: 16,
+  },
+});
+
 export default App;