Experiment with async/await

Note that URLSession async only works >=iOS 15. I changed the target for
now, but may mess with continuations.

1 files changed, 10 insertions, 9 deletions

diff --git a/foray/Presenters/PenguinItemPresenter.swift b/foray/Presenters/PenguinItemPresenter.swift
index c4553ae..1d617bf 100644
--- a/foray/Presenters/PenguinItemPresenter.swift
+++ b/foray/Presenters/PenguinItemPresenter.swift
@@ -8,18 +8,19 @@
 import Foundation
 
 class PenguinItemPresenter {
+
+    private struct Constants {
+        static let apiEndpoint = "https://users.windblume.net/~nick/upload/dummy.json"
+    }
     
     let fetcher = ForayFetcher()
     
-    func fetch(receiver: @escaping ([PenguinItemViewModel]) -> ()) {
-        fetcher.fetch(url: "https://users.windblume.net/~nick/upload/dummy.json") { [weak self] (apiItems: [PenguinItemModel]) in
-            // Callback to main thread here
-            // There probably is a nicer way to do it, but we will DispatchQueue it back
-            // from the Presenter-level for now (main thread from VC onwards)
-            DispatchQueue.main.async {
-                guard let self = self else { return }
-                receiver(self.transform(models: apiItems))
-            }
+    func fetch() async -> [PenguinItemViewModel] {
+        do {
+            let apiItems: [PenguinItemModel] = try await fetcher.fetch(url: Constants.apiEndpoint)
+            return transform(models: apiItems)
+        } catch {
+            return []
         }
     }