docs: use user id when storing user's avatar image (#228)

Author: Guilherme Souza

Examples/UserManagement/ProfileView.swift

@@ -167,14 +167,15 @@ struct ProfileView: View {
   private func uploadImage() async throws -> String? {
     guard let data = avatarImage?.data else { return nil }
 
-    let filePath = "\(UUID().uuidString).jpeg"
+    let userId = try await supabase.auth.session.user.id.uuidString
+    let filePath = "\(userId)/profile.jpeg"
 
     try await supabase.storage
       .from("avatars")
       .upload(
         path: filePath,
         file: data,
-        options: FileOptions(contentType: "image/jpeg")
+        options: FileOptions(contentType: "image/jpeg", upsert: true)
       )
 
     return filePath

Examples/UserManagement/supabase/migrations/20240125111924_init.sql

@@ -49,16 +49,23 @@ insert into storage.buckets(id, name)
 
 -- Set up access controls for storage.
 -- See https://supabase.com/docs/guides/storage/security/access-control#policy-examples for more details.
-create policy "Avatar images are publicly accessible." on storage.objects
-  for select
-    using (bucket_id = 'avatars');
+create policy "Give users access to own folder 1oj01fe_0" on storage.objects
+  for select to authenticated
+    using (bucket_id = 'avatars'
+      and LOWER(auth.uid()::text) = LOWER((storage.foldername(name))[1]));
 
-create policy "Anyone can upload an avatar." on storage.objects
-  for insert
-    with check (bucket_id = 'avatars');
+create policy "Give users access to own folder 1oj01fe_1" on storage.objects
+  for insert to authenticated
+    with check (bucket_id = 'avatars'
+    and LOWER(auth.uid()::text) = LOWER((storage.foldername(name))[1]));
 
-create policy "Anyone can update their own avatar." on storage.objects
-  for update
-    using (auth.uid() = owner)
-    with check (bucket_id = 'avatars');
+create policy "Give users access to own folder 1oj01fe_2" on storage.objects
+  for update to authenticated
+    using (bucket_id = 'avatars'
+      and LOWER(auth.uid()::text) = LOWER((storage.foldername(name))[1]));
+
+create policy "Give users access to own folder 1oj01fe_3" on storage.objects
+  for delete to authenticated
+    using (bucket_id = 'avatars'
+      and LOWER(auth.uid()::text) = LOWER((storage.foldername(name))[1]));
 

Sources/Storage/StorageFileApi.swift

@@ -71,9 +71,11 @@ public class StorageFileApi: StorageApi {
   ///   - file: The Data to be stored in the bucket.
   ///   - options: HTTP headers. For example `cacheControl`
   @discardableResult
-  public func upload(path: String, file: Data, options: FileOptions = FileOptions())
-    async throws -> String
-  {
+  public func upload(
+    path: String,
+    file: Data,
+    options: FileOptions = FileOptions()
+  ) async throws -> String {
     try await uploadOrUpdate(method: .post, path: path, file: file, options: options)
   }
 
@@ -84,9 +86,11 @@ public class StorageFileApi: StorageApi {
   ///   - file: The Data to be stored in the bucket.
   ///   - options: HTTP headers. For example `cacheControl`
   @discardableResult
-  public func update(path: String, file: Data, options: FileOptions = FileOptions())
-    async throws -> String
-  {
+  public func update(
+    path: String,
+    file: Data,
+    options: FileOptions = FileOptions()
+  ) async throws -> String {
     try await uploadOrUpdate(method: .put, path: path, file: file, options: options)
   }