Uses Keychain.patreonAccountID to fetch current user’s PatreonAccount

Allows us to distinguish between the current user and other cached patrons in the future.

AltStoreCore/Components/Keychain.swift

@@ -74,6 +74,9 @@ public class Keychain
     @KeychainItem(key: "patreonCreatorAccessToken")
     public var patreonCreatorAccessToken: String?
     
+    @KeychainItem(key: "patreonAccountID")
+    public var patreonAccountID: String?
+    
     private init()
     {
     }

AltStoreCore/Model/DatabaseManager.swift

@@ -151,8 +151,12 @@ public extension DatabaseManager
     
     func patreonAccount(in context: NSManagedObjectContext = DatabaseManager.shared.viewContext) -> PatreonAccount?
     {
-        let patronAccount = PatreonAccount.first(in: context)
-        return patronAccount
+        guard let patreonAccountID = Keychain.shared.patreonAccountID else { return nil }
+            
+        let predicate = NSPredicate(format: "%K == %@", #keyPath(PatreonAccount.identifier), patreonAccountID)
+        
+        let patreonAccount = PatreonAccount.first(satisfying: predicate, in: context)
+        return patreonAccount
     }
 }
 

AltStoreCore/Patreon/PatreonAPI.swift

@@ -120,7 +120,15 @@ public extension PatreonAPI
                         Keychain.shared.patreonAccessToken = accessToken
                         Keychain.shared.patreonRefreshToken = refreshToken
                         
-                        self.fetchAccount(completion: completion)
+                        self.fetchAccount { (result) in
+                            switch result
+                            {
+                            case .success(let account): Keychain.shared.patreonAccountID = account.identifier
+                            case .failure: break
+                            }
+                            
+                            completion(result)
+                        }
                     }
                 }
             }
@@ -238,8 +246,10 @@ public extension PatreonAPI
         DatabaseManager.shared.persistentContainer.performBackgroundTask { (context) in
             do
             {
-                let accounts = PatreonAccount.all(in: context, requestProperties: [\FetchRequest.returnsObjectsAsFaults: true])
-                accounts.forEach(context.delete(_:))
+                if let account = DatabaseManager.shared.patreonAccount(in: context)
+                {
+                    context.delete(account)
+                }
                 
                 self.deactivateBetaApps(in: context)
                 
@@ -247,6 +257,7 @@ public extension PatreonAPI
                 
                 Keychain.shared.patreonAccessToken = nil
                 Keychain.shared.patreonRefreshToken = nil
+                Keychain.shared.patreonAccountID = nil
                 
                 completion(.success(()))
             }