From 3338da4e0999ba0f0067f987bd462756fc21db4a Mon Sep 17 00:00:00 2001
From: Krille Fear <christian-pauly@posteo.de>
Date: Mon, 22 Nov 2021 19:36:38 +0100
Subject: [PATCH] fix: Ability to remove avatar from room and account

To remove an avatar the
client needs to send an
empty object. This is now
possible by making the
MatrixFile parameter nullable.
---
 lib/src/client.dart | 17 ++++++++++-------
 lib/src/room.dart   | 13 ++++++++-----
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/lib/src/client.dart b/lib/src/client.dart
index c9a10128..75b0e220 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -821,13 +821,16 @@ class Client extends MatrixApi {
     }
   }
 
-  /// Uploads a new user avatar for this user.
-  Future<void> setAvatar(MatrixFile file) async {
-    final uploadResp = await uploadContent(
-      file.bytes,
-      filename: file.name,
-      contentType: file.mimeType,
-    );
+  /// Uploads a new user avatar for this user. Leave file null to remove the
+  /// current avatar.
+  Future<void> setAvatar(MatrixFile? file) async {
+    final uploadResp = file == null
+        ? null
+        : await uploadContent(
+            file.bytes,
+            filename: file.name,
+            contentType: file.mimeType,
+          );
     await setAvatarUrl(userID!, uploadResp);
     return;
   }
diff --git a/lib/src/room.dart b/lib/src/room.dart
index b674bf81..20e8abc0 100644
--- a/lib/src/room.dart
+++ b/lib/src/room.dart
@@ -1356,15 +1356,18 @@ class Room {
   }
 
   /// Uploads a new user avatar for this room. Returns the event ID of the new
-  /// m.room.avatar event.
-  Future<String> setAvatar(MatrixFile file) async {
-    final uploadResp =
-        await client.uploadContent(file.bytes, filename: file.name);
+  /// m.room.avatar event. Leave empty to remove the current avatar.
+  Future<String> setAvatar(MatrixFile? file) async {
+    final uploadResp = file == null
+        ? null
+        : await client.uploadContent(file.bytes, filename: file.name);
     return await client.setRoomStateWithKey(
       id,
       EventTypes.RoomAvatar,
       '',
-      {'url': uploadResp.toString()},
+      {
+        if (uploadResp != null) 'url': uploadResp.toString(),
+      },
     );
   }