Store and restore drafts (#2898)

ElementX/Sources/Services/Room/RoomProxy.swift

@@ -565,6 +565,37 @@ class RoomProxy: RoomProxyProtocol {
             return .failure(.sdkError(error))
         }
     }
+    
+    // MARK: - Drafts
+    
+    func saveDraft(_ draft: ComposerDraft) async -> Result<Void, RoomProxyError> {
+        do {
+            try await room.saveComposerDraft(draft: draft)
+            return .success(())
+        } catch {
+            MXLog.error("Failed saving draft with error: \(error)")
+            return .failure(.sdkError(error))
+        }
+    }
+    
+    func loadDraft() async -> Result<ComposerDraft?, RoomProxyError> {
+        do {
+            return try await .success(room.loadComposerDraft())
+        } catch {
+            MXLog.error("Failed restoring draft with error: \(error)")
+            return .failure(.sdkError(error))
+        }
+    }
+    
+    func clearDraft() async -> Result<Void, RoomProxyError> {
+        do {
+            try await room.clearComposerDraft()
+            return .success(())
+        } catch {
+            MXLog.error("Failed clearing draft with error: \(error)")
+            return .failure(.sdkError(error))
+        }
+    }
 
     // MARK: - Private
     

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -126,7 +126,6 @@ protocol RoomProxyProtocol {
     // MARK: - Element Call
     
     func canUserJoinCall(userID: String) async -> Result<Bool, RoomProxyError>
-    
     func elementCallWidgetDriver() -> ElementCallWidgetDriverProtocol
     
     func sendCallNotificationIfNeeeded() async -> Result<Void, RoomProxyError>
@@ -134,8 +133,13 @@ protocol RoomProxyProtocol {
     // MARK: - Permalinks
     
     func matrixToPermalink() async -> Result<URL, RoomProxyError>
-    
     func matrixToEventPermalink(_ eventID: String) async -> Result<URL, RoomProxyError>
+    
+    // MARK: - Drafts
+    
+    func saveDraft(_ draft: ComposerDraft) async -> Result<Void, RoomProxyError>
+    func loadDraft() async -> Result<ComposerDraft?, RoomProxyError>
+    func clearDraft() async -> Result<Void, RoomProxyError>
 }
 
 extension RoomProxyProtocol {