[Feat] Define helpers when the publisher is Void and Future is used

Author: SHcommit

Sources/SHFirestoreService/Publisher+FutureHelpers.swift

@@ -0,0 +1,48 @@
+//
+//  Publisher+FutureHelpers.swift
+//
+//
+//  Created by 양승현 on 5/8/24.
+//
+
+import Foundation
+
+#if canImport(Combine) && os(iOS) && swift(>=5.0)
+import Combine
+
+public extension Publisher
+where Output == Void, Failure == FirestoreServiceError {
+  func sink(promise: @escaping Future<Output, Error>.Promise) -> AnyCancellable {
+    return sink { completion in
+      if case .failure(let error) = completion {
+        promise(.failure(error))
+      }
+    } receiveValue: { _ in
+      promise(.success(()))
+    }
+  }
+  
+  func sink(promise: @escaping Future<Output, Failure>.Promise) -> AnyCancellable {
+    return sink { completion in
+      if case .failure(let error) = completion {
+        promise(.failure(error))
+      }
+    } receiveValue: { _ in
+      promise(.success(()))
+    }
+  }
+}
+
+public extension Publisher
+where Output == Void, Failure == Error {
+  func sink(promise: @escaping Future<Output, Failure>.Promise) -> AnyCancellable {
+    return sink { completion in
+      if case .failure(let error) = completion {
+        promise(.failure(error))
+      }
+    } receiveValue: { _ in
+      promise(.success(()))
+    }
+  }
+}
+#endif