refactor(): created remote image service protocol

Author: Christian Elies

Sources/RemoteImage/private/Protocols/RemoteImageServiceProtocol.swift

@@ -0,0 +1,16 @@
+//
+//  RemoteImageServiceProtocol.swift
+//  RemoteImage
+//
+//  Created by Christian Elies on 15.12.19.
+//
+
+import Combine
+
+protocol RemoteImageServiceProtocol where Self: ObservableObject {
+    static var cache: RemoteImageCache { get set }
+    static var cacheKeyProvider: RemoteImageCacheKeyProvider { get set }
+
+    var state: RemoteImageState { get set }
+    func fetchImage(ofType type: RemoteImageType)
+}

Sources/RemoteImage/public/Services/RemoteImageService.swift

@@ -9,9 +9,9 @@
 import Combine
 import Foundation
 
-public final class RemoteImageService: NSObject, ObservableObject {
-    public typealias RemoteImageCacheKeyProvider = (RemoteImageType) -> AnyObject
+public typealias RemoteImageCacheKeyProvider = (RemoteImageType) -> AnyObject
 
+public final class RemoteImageService: NSObject, ObservableObject, RemoteImageServiceProtocol {
     private let dependencies: RemoteImageServiceDependenciesProtocol
     private var cancellable: AnyCancellable?
 

Sources/RemoteImage/public/Views/RemoteImage.swift

@@ -14,9 +14,9 @@ public struct RemoteImage<ErrorView: View, ImageView: View, LoadingView: View>:
     private let errorView: (Error) -> ErrorView
     private let imageView: (Image) -> ImageView
     private let loadingView: () -> LoadingView
-    
+
     @ObservedObject private var service = RemoteImageServiceFactory.makeRemoteImageService()
-    
+
     public var body: AnyView {
         switch service.state {
             case .error(let error):
@@ -46,7 +46,7 @@ public struct RemoteImage<ErrorView: View, ImageView: View, LoadingView: View>:
                 )
         }
     }
-    
+
     public init(type: RemoteImageType, @ViewBuilder errorView: @escaping (Error) -> ErrorView, @ViewBuilder imageView: @escaping (Image) -> ImageView, @ViewBuilder loadingView: @escaping () -> LoadingView) {
         self.type = type
         self.errorView = errorView