add fallback if supabase fails to initialize

Author: jmate03

GamerMatchApp/app/(tabs)/profileScreen.tsx

@@ -292,6 +292,10 @@ console.log("Temp User Profile:",tempProfile);
   * stores the image in Supabase Storage and sends it to MongoDB.
   */
  const handleProfilePictureEdit = async () => {
+  if(!supabase){ // if supabase does not initialize properly, alert the user that they cannot upload an image at this time
+    Alert.alert("Offline","Supabase did not initialize properly, cannot upload image. Please try again later.");
+    return;
+  }
   try {
     setUploading(true);
     const phoneNumber = await AsyncStorage.getItem("currentUserPhoneNumber");

GamerMatchApp/lib/supabase.ts

@@ -1,20 +1,26 @@
 // Connects Supabase to Expo React Native
 import 'react-native-url-polyfill/auto'
-import { createClient } from '@supabase/supabase-js'
+import { createClient, SupabaseClient } from '@supabase/supabase-js'
 import 'expo-sqlite/localStorage/install';
+import Constants from "expo-constants";
+import AsyncStorage from '@react-native-async-storage/async-storage';
 
+const extras = Constants.expoConfig?.extra ?? {};
 const supabaseUrl = process.env.EXPO_PUBLIC_SUPABASE_URL
 const supabaseAnonKey = process.env.EXPO_PUBLIC_SUPABASE_PUBLISHABLE_KEY
+// allow supabase to be null if env vars are missing
+export let supabase: SupabaseClient | null = null;
 
-if (!supabaseUrl || !supabaseAnonKey){
-    throw new Error("Missing Supabase environment variables.")
-}
-
-export const supabase = createClient(supabaseUrl, supabaseAnonKey, {
-  auth: {
-    storage: localStorage,
-    autoRefreshToken: true,
-    persistSession: true,
-    detectSessionInUrl: false,
-  },
-})
+if (supabaseUrl && supabaseAnonKey) {
+  supabase = createClient(supabaseUrl, supabaseAnonKey, {
+    auth: {
+      storage: AsyncStorage,
+      autoRefreshToken: true,
+      persistSession: true,
+      detectSessionInUrl: false,
+    },
+  });
+} else {
+  // do not throw, allow app to run without Supabase for dev or missing config
+  console.warn('[supabase] env vars missing. running without Supabase');
+}