XCode project for app, moved app project to folder

SideStoreApp/Sources/SideStoreAppKit/Operations/RefreshGroup.swift

@@ -0,0 +1,82 @@
+//
+//  RefreshGroup.swift
+//  AltStore
+//
+//  Created by Riley Testut on 6/20/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import CoreData
+import Foundation
+
+import AltSign
+import SideStoreCore
+
+public final class RefreshGroup: NSObject {
+    let context: AuthenticatedOperationContext
+    let progress = Progress.discreteProgress(totalUnitCount: 0)
+
+    var completionHandler: (([String: Result<InstalledApp, Error>]) -> Void)?
+    var beginInstallationHandler: ((InstalledApp) -> Void)?
+
+    private(set) var results = [String: Result<InstalledApp, Error>]()
+
+    // Keep strong references to managed object contexts
+    // so they don't die out from under us.
+    private(set) var _contexts = Set<NSManagedObjectContext>()
+
+    private var isFinished = false
+
+    private let dispatchGroup = DispatchGroup()
+    private var operations: [Foundation.Operation] = []
+
+	public init(context: AuthenticatedOperationContext = AuthenticatedOperationContext()) {
+        self.context = context
+
+        super.init()
+    }
+
+    /// Used to keep track of which operations belong to this group.
+    /// This does _not_ add them to any operation queue.
+	public func add(_ operations: [Foundation.Operation]) {
+        for operation in operations {
+            dispatchGroup.enter()
+
+            operation.completionBlock = { [weak self] in
+                self?.dispatchGroup.leave()
+            }
+        }
+
+        if self.operations.isEmpty && !operations.isEmpty {
+            dispatchGroup.notify(queue: .global()) { [weak self] in
+                self?.finish()
+            }
+        }
+
+        self.operations.append(contentsOf: operations)
+    }
+
+	public func set(_ result: Result<InstalledApp, Error>, forAppWithBundleIdentifier bundleIdentifier: String) {
+        results[bundleIdentifier] = result
+
+        switch result {
+        case .failure: break
+        case let .success(installedApp):
+            guard let context = installedApp.managedObjectContext else { break }
+            _contexts.insert(context)
+        }
+    }
+
+	public func cancel() {
+        operations.forEach { $0.cancel() }
+    }
+}
+
+private extension RefreshGroup {
+    func finish() {
+        guard !isFinished else { return }
+        isFinished = true
+
+        completionHandler?(results)
+    }
+}