Added 'cloud storage' functionality

FastNotes/libs/supabase.ts

@@ -0,0 +1,49 @@
+import { createClient } from '@supabase/supabase-js';
+import { deleteItemAsync, getItemAsync, setItemAsync } from 'expo-secure-store';
+import 'react-native-url-polyfill/auto';
+import Constants from "expo-constants"
+import { Platform } from 'react-native';
+
+const ExpoSecureStoreAdapter = {
+  getItem: (key: string) => {
+    console.debug("getItem", { key, getItemAsync })
+    return getItemAsync(key)
+  },
+  setItem: (key: string, value: string) => {
+    if (value.length > 2048) {
+      console.warn('Value being stored in SecureStore is larger than 2048 bytes and it may not be stored successfully. In a future SDK version, this call may throw an error.')
+    }
+    return setItemAsync(key, value)
+  },
+  removeItem: (key: string) => {
+    return deleteItemAsync(key)
+  },
+};
+
+const extra = (Constants.expoConfig?.extra ?? Constants.manifest?.extra) as {
+  supabaseUrl?: string;
+  supabaseKey?: string;
+};
+
+const supabaseUrl = extra?.supabaseUrl
+const supabaseAnonKey = extra?.supabaseKey
+
+if(!supabaseUrl || !supabaseAnonKey){
+  throw new Error("Cannot read env variables")
+}
+
+const storage = (
+  Platform.OS === "web"
+    ? window.localStorage
+    : ExpoSecureStoreAdapter
+)
+
+export const supabase = createClient(supabaseUrl, supabaseAnonKey, {
+  auth: {
+      storage: storage as any,
+      autoRefreshToken: true,
+      persistSession: true,
+      detectSessionInUrl: false,
+    },
+  }
+)