[AltStore] Adds basic Patreon integration

- Lists beta versions of apps when signed in to Patreon
- Lists names of Patrons with the Credits benefit

AltStore/Settings/PatreonViewController.swift

@@ -0,0 +1,129 @@
+//
+//  PatreonViewController.swift
+//  AltStore
+//
+//  Created by Riley Testut on 8/20/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import AuthenticationServices
+
+import Roxas
+
+class PatreonViewController: UITableViewController
+{
+    private lazy var dataSource = self.makeDataSource()
+    
+    @IBOutlet private var signInButton: UIBarButtonItem!
+    @IBOutlet private var signOutButton: UIBarButtonItem!
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        self.tableView.dataSource = self.dataSource
+        
+        self.update()
+    }
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+        
+        self.fetchPatrons()
+    }
+}
+
+private extension PatreonViewController
+{
+    func makeDataSource() -> RSTArrayTableViewDataSource<Patron>
+    {
+        let dataSource = RSTArrayTableViewDataSource<Patron>(items: [])
+        dataSource.cellConfigurationHandler = { (cell, patron, indexPath) in
+            cell.textLabel?.text = patron.name
+        }
+        
+        return dataSource
+    }
+    
+    func update()
+    {
+        if PatreonAPI.shared.isAuthenticated && DatabaseManager.shared.patreonAccount() != nil
+        {
+            self.navigationItem.rightBarButtonItem = self.signOutButton
+        }
+        else
+        {
+            self.navigationItem.rightBarButtonItem = self.signInButton
+        }
+    }
+    
+    func fetchPatrons()
+    {
+        PatreonAPI.shared.fetchPatrons { (result) in
+            do
+            {
+                let patrons = try result.get()
+                self.dataSource.items = patrons
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    let toastView = ToastView(text: error.localizedDescription, detailText: nil)
+                    toastView.show(in: self.navigationController?.view ?? self.view, duration: 2.0)
+                }
+            }
+        }
+    }
+}
+
+private extension PatreonViewController
+{
+    @IBAction func authenticate(_ sender: UIBarButtonItem)
+    {
+        PatreonAPI.shared.authenticate { (result) in
+            do
+            {
+                let account = try result.get()
+                try account.managedObjectContext?.save()
+                
+                DispatchQueue.main.async {
+                    self.update()
+                }
+            }
+            catch ASWebAuthenticationSessionError.canceledLogin
+            {
+                // Ignore
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    let toastView = ToastView(text: error.localizedDescription, detailText: nil)
+                    toastView.show(in: self.navigationController?.view ?? self.view, duration: 2.0)
+                }
+            }
+        }
+    }
+    
+    @IBAction func signOut(_ sender: UIBarButtonItem)
+    {
+        PatreonAPI.shared.signOut { (result) in
+            do
+            {
+                try result.get()
+                
+                DispatchQueue.main.async {
+                    self.update()
+                }
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    let toastView = ToastView(text: error.localizedDescription, detailText: nil)
+                    toastView.show(in: self.navigationController?.view ?? self.view, duration: 2.0)
+                }
+            }
+        }
+    }
+}