global provider and useAppwrite

app/_layout.tsx

@@ -3,6 +3,7 @@ import { useFonts } from "expo-font";
 import { useEffect } from "react";
 // import * as SplashScreen from "expo-splash-screen";
 import "./global.css";
+import GlobalProvider from "@/lib/globalProvider";
 
 export default function RootLayout() {
   const [fontLoaded] = useFonts({
@@ -19,5 +20,9 @@ export default function RootLayout() {
     return null;
   }
 
-  return <Stack screenOptions={{headerShown: false}}/>;
+  return(
+  <GlobalProvider>
+  <Stack screenOptions={{headerShown: false}}/>;
+  </GlobalProvider>
+  )
 }

app/signin.tsx

@@ -1,10 +1,20 @@
-import {View, Text, SafeAreaView, ScrollView, Image, TouchableOpacity} from "react-native";
+import {View, Text, SafeAreaView, ScrollView, Image, TouchableOpacity, Alert} from "react-native";
 import React from "react";
 import images from "@/constants/images";
 import icons from "@/constants/icons";
+import {login} from "@/lib/appwrite";
+import {useGlobalContext} from "@/lib/globalProvider";
 
 const SignIn = () => {
-    const handleLogin = () => {}
+    const {refetch, loading, isLoggedIn} = useGlobalContext();
+    const handleLogin = async () => {
+        const result = await login();
+        if (result) {
+            console.log('logon successful');
+        } else {
+            Alert.alert('Login failed')
+        }
+    }
     return (
     <SafeAreaView className="bg-white h-full">
       <ScrollView contentContainerClassName="h-full">

lib/appwrite.ts

@@ -55,12 +55,28 @@ export async function login (){
     }
 }
 
-export async function logOut(): Promise<boolean> {
+export async function getCurrentUser() {
     try {
-        await account.deleteSession(sessionId: 'current');
-        return true;
+        const response = await account.get();
+        if(response.$id){
+            const userAvatar = avatar.getInitials(response.name)
+            return {
+                ...response,
+                avatar: userAvatar.toString(),
+            }
+        }
     } catch (error) {
-        console.error("Failed to log out user:", error);
-        return false;
+        console.error(error)
+        return null;
     }
 }
+
+// export async function logOut(): Promise<boolean> {
+//     try {
+//         await account.deleteSession(sessionId: 'current');
+//         return true;
+//     } catch (error) {
+//         console.error("Failed to log out user:", error);
+//         return false;
+//     }
+// }

lib/globalProvider.tsx

@@ -0,0 +1,62 @@
+import React, { createContext, useContext, ReactNode } from "react";
+
+import { getCurrentUser } from "./appwrite";
+import { useAppwrite } from "./useAppwrite";
+import { Redirect } from "expo-router";
+// import {replace} from "@remix-run/router";
+
+interface GlobalContextType {
+    isLoggedIn: boolean;
+    user: User | null;
+    loading: boolean;
+    refetch: (newParams?: Record<string, string | number>) => Promise<void>
+}
+
+interface User {
+    $id: string;
+    name: string;
+    email: string;
+    avatar: string;
+}
+
+const GlobalContext = createContext<GlobalContextType | undefined>(undefined);
+
+interface GlobalProviderProps {
+    children: ReactNode;
+}
+
+export const GlobalProvider = ({ children }: {children: ReactNode}) => {
+    const {
+        data: user,
+        loading,
+        refetch,
+    } = useAppwrite({
+        fn: getCurrentUser,
+    });
+
+    const isLoggedIn = !!user;
+    console.log(JSON.stringify(user));
+
+    return (
+        <GlobalContext.Provider
+            value={{
+                isLoggedIn,
+                user,
+                loading,
+                refetch,
+            }}
+        >
+            {children}
+        </GlobalContext.Provider>
+    );
+};
+
+export const useGlobalContext = (): GlobalContextType => {
+    const context = useContext(GlobalContext);
+    if (!context)
+        throw new Error("useGlobalContext must be used within a GlobalProvider");
+
+    return context;
+};
+
+export default GlobalProvider;

lib/useAppwrite.ts

@@ -0,0 +1,55 @@
+import { Alert } from "react-native";
+import { useEffect, useState, useCallback } from "react";
+
+interface UseAppwriteOptions<T, P extends Record<string, string | number>> {
+    fn: (params: P) => Promise<T>;
+    params?: P;
+    skip?: boolean;
+}
+
+interface UseAppwriteReturn<T, P> {
+    data: T | null;
+    loading: boolean;
+    error: string | null;
+    refetch: (newParams: P) => Promise<void>;
+}
+
+export const useAppwrite = <T, P extends Record<string, string | number>>({
+                                                                              fn,
+                                                                              params = {} as P,
+                                                                              skip = false,
+                                                                          }: UseAppwriteOptions<T, P>): UseAppwriteReturn<T, P> => {
+    const [data, setData] = useState<T | null>(null);
+    const [loading, setLoading] = useState(!skip);
+    const [error, setError] = useState<string | null>(null);
+
+    const fetchData = useCallback(
+        async (fetchParams: P) => {
+            setLoading(true);
+            setError(null);
+
+            try {
+                const result = await fn(fetchParams);
+                setData(result);
+            } catch (err: unknown) {
+                const errorMessage =
+                    err instanceof Error ? err.message : "An unknown error occurred";
+                setError(errorMessage);
+                Alert.alert("Error", errorMessage);
+            } finally {
+                setLoading(false);
+            }
+        },
+        [fn]
+    );
+
+    useEffect(() => {
+        if (!skip) {
+            fetchData(params);
+        }
+    }, []);
+
+    const refetch = async (newParams: P) => await fetchData(newParams);
+
+    return { data, loading, error, refetch };
+};