Adds placeholder view to NewsViewController and BrowseViewController

AltStore.xcodeproj/project.pbxproj

@@ -38,6 +38,7 @@
 		BF3D64B022E8D4B800E9056B /* AppContentViewControllerCells.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF3D64AF22E8D4B800E9056B /* AppContentViewControllerCells.swift */; };
 		BF3F786422CAA41E008FBD20 /* ALTDeviceManager+Installation.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF3F786322CAA41E008FBD20 /* ALTDeviceManager+Installation.swift */; };
 		BF41B806233423AE00C593A3 /* TabBarController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF41B805233423AE00C593A3 /* TabBarController.swift */; };
+		BF41B808233433C100C593A3 /* LoadingState.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF41B807233433C100C593A3 /* LoadingState.swift */; };
 		BF43002E22A714AF0051E2BC /* Keychain.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF43002D22A714AF0051E2BC /* Keychain.swift */; };
 		BF43003022A71C960051E2BC /* UserDefaults+AltStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF43002F22A71C960051E2BC /* UserDefaults+AltStore.swift */; };
 		BF44CC6C232AEB90004DA9C3 /* LaunchAtLogin.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = BF44CC6A232AEB74004DA9C3 /* LaunchAtLogin.framework */; };
@@ -313,6 +314,7 @@
 		BF3D64AF22E8D4B800E9056B /* AppContentViewControllerCells.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppContentViewControllerCells.swift; sourceTree = "<group>"; };
 		BF3F786322CAA41E008FBD20 /* ALTDeviceManager+Installation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "ALTDeviceManager+Installation.swift"; sourceTree = "<group>"; };
 		BF41B805233423AE00C593A3 /* TabBarController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TabBarController.swift; sourceTree = "<group>"; };
+		BF41B807233433C100C593A3 /* LoadingState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoadingState.swift; sourceTree = "<group>"; };
 		BF43002D22A714AF0051E2BC /* Keychain.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Keychain.swift; sourceTree = "<group>"; };
 		BF43002F22A71C960051E2BC /* UserDefaults+AltStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UserDefaults+AltStore.swift"; sourceTree = "<group>"; };
 		BF44CC6A232AEB74004DA9C3 /* LaunchAtLogin.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = LaunchAtLogin.framework; path = Carthage/Build/Mac/LaunchAtLogin.framework; sourceTree = "<group>"; };
@@ -600,6 +602,7 @@
 				BF3D648C22E79AC800E9056B /* ALTAppPermission.m */,
 				BF54E81F2315EF0D000AE0D8 /* ALTPatreonBenefitType.h */,
 				BF54E8202315EF0D000AE0D8 /* ALTPatreonBenefitType.m */,
+				BF41B807233433C100C593A3 /* LoadingState.swift */,
 			);
 			path = Types;
 			sourceTree = "<group>";
@@ -1480,6 +1483,7 @@
 				BF9ABA4722DD0638008935CF /* BrowseCollectionViewCell.swift in Sources */,
 				BF3D648822E79A3700E9056B /* AppPermission.swift in Sources */,
 				BFD6B03322DFF20800B86064 /* MyAppsComponents.swift in Sources */,
+				BF41B808233433C100C593A3 /* LoadingState.swift in Sources */,
 				BFF0B69A2322D7D0007A79E1 /* UIScreen+CompactHeight.swift in Sources */,
 				BFD5D6EE230D8A86007955AB /* Patron.swift in Sources */,
 				BF8F69C222E659F700049BA1 /* AppContentViewController.swift in Sources */,

AltStore/Browse/BrowseViewController.swift

@@ -15,9 +15,16 @@ import Nuke
 class BrowseViewController: UICollectionViewController
 {
     private lazy var dataSource = self.makeDataSource()
+    private lazy var placeholderView = RSTPlaceholderView(frame: .zero)
     
     private let prototypeCell = BrowseCollectionViewCell.instantiate(with: BrowseCollectionViewCell.nib!)!
     
+    private var loadingState: LoadingState = .loading {
+        didSet {
+            self.update()
+        }
+    }
+    
     private var cachedItemSizes = [String: CGSize]()
     
     override func viewDidLoad()
@@ -32,6 +39,8 @@ class BrowseViewController: UICollectionViewController
         self.collectionView.prefetchDataSource = self.dataSource
         
         self.registerForPreviewing(with: self, sourceView: self.collectionView)
+        
+        self.update()
     }
     
     override func viewWillAppear(_ animated: Bool)
@@ -135,6 +144,8 @@ private extension BrowseViewController
             }
         }
         
+        dataSource.placeholderView = self.placeholderView
+        
         return dataSource
     }
     
@@ -152,21 +163,61 @@ private extension BrowseViewController
     
     func fetchSource()
     {
+        self.loadingState = .loading
+        
         AppManager.shared.fetchSource() { (result) in
             do
             {
                 let source = try result.get()
                 try source.managedObjectContext?.save()
+                
+                DispatchQueue.main.async {
+                    self.loadingState = .finished(.success(()))
+                }
             }
             catch
             {
                 DispatchQueue.main.async {
+                    if self.dataSource.itemCount > 0
+                    {
                         let toastView = ToastView(text: error.localizedDescription, detailText: nil)
                         toastView.show(in: self.navigationController?.view ?? self.view, duration: 2.0)
                     }
+                    
+                    self.loadingState = .finished(.failure(error))
                 }
             }
         }
+    }
+    
+    func update()
+    {
+        switch self.loadingState
+        {
+        case .loading:
+            self.placeholderView.textLabel.isHidden = true
+            self.placeholderView.detailTextLabel.isHidden = false
+            
+            self.placeholderView.detailTextLabel.text = NSLocalizedString("Loading...", comment: "")
+            
+            self.placeholderView.activityIndicatorView.startAnimating()
+            
+        case .finished(.failure(let error)):
+            self.placeholderView.textLabel.isHidden = false
+            self.placeholderView.detailTextLabel.isHidden = false
+            
+            self.placeholderView.textLabel.text = NSLocalizedString("Unable to Fetch Apps", comment: "")
+            self.placeholderView.detailTextLabel.text = error.localizedDescription
+            
+            self.placeholderView.activityIndicatorView.stopAnimating()
+            
+        case .finished(.success):
+            self.placeholderView.textLabel.isHidden = true
+            self.placeholderView.detailTextLabel.isHidden = true
+            
+            self.placeholderView.activityIndicatorView.stopAnimating()
+        }
+    }
 }
 
 private extension BrowseViewController

AltStore/News/NewsViewController.swift

@@ -34,8 +34,16 @@ private class AppBannerFooterView: UICollectionReusableView
 class NewsViewController: UICollectionViewController
 {
     private lazy var dataSource = self.makeDataSource()
+    private lazy var placeholderView = RSTPlaceholderView(frame: .zero)
+    
     private var prototypeCell: NewsCollectionViewCell!
     
+    private var loadingState: LoadingState = .loading {
+        didSet {
+            self.update()
+        }
+    }
+    
     // Cache
     private var cachedCellSizes = [String: CGSize]()
     
@@ -56,6 +64,8 @@ class NewsViewController: UICollectionViewController
         self.collectionView.register(AppBannerFooterView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionFooter, withReuseIdentifier: "AppBanner")
         
         self.registerForPreviewing(with: self, sourceView: self.collectionView)
+        
+        self.update()
     }
     
     override func viewWillAppear(_ animated: Bool)
@@ -125,26 +135,68 @@ private extension NewsViewController
             }
         }
         
+        dataSource.placeholderView = self.placeholderView
+        
         return dataSource
     }
 
     func fetchSource()
     {
+        self.loadingState = .loading
+        
         AppManager.shared.fetchSource() { (result) in
             do
             {
                 let source = try result.get()
                 try source.managedObjectContext?.save()
+                
+                DispatchQueue.main.async {
+                    self.loadingState = .finished(.success(()))
+                }
             }
             catch
             {
                 DispatchQueue.main.async {
+                    if self.dataSource.itemCount > 0
+                    {
                         let toastView = ToastView(text: error.localizedDescription, detailText: nil)
                         toastView.show(in: self.navigationController?.view ?? self.view, duration: 2.0)
                     }
+                    
+                    self.loadingState = .finished(.failure(error))
                 }
             }
         }
+    }
+    
+    func update()
+    {
+        switch self.loadingState
+        {
+        case .loading:
+            self.placeholderView.textLabel.isHidden = true
+            self.placeholderView.detailTextLabel.isHidden = false
+            
+            self.placeholderView.detailTextLabel.text = NSLocalizedString("Loading...", comment: "")
+            
+            self.placeholderView.activityIndicatorView.startAnimating()
+            
+        case .finished(.failure(let error)):
+            self.placeholderView.textLabel.isHidden = false
+            self.placeholderView.detailTextLabel.isHidden = false
+            
+            self.placeholderView.textLabel.text = NSLocalizedString("Unable to Fetch News", comment: "")
+            self.placeholderView.detailTextLabel.text = error.localizedDescription
+            
+            self.placeholderView.activityIndicatorView.stopAnimating()
+            
+        case .finished(.success):
+            self.placeholderView.textLabel.isHidden = true
+            self.placeholderView.detailTextLabel.isHidden = true
+            
+            self.placeholderView.activityIndicatorView.stopAnimating()
+        }
+    }
 }
 
 private extension NewsViewController

AltStore/Types/LoadingState.swift

@@ -0,0 +1,15 @@
+//
+//  LoadingState.swift
+//  AltStore
+//
+//  Created by Riley Testut on 9/19/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+enum LoadingState
+{
+    case loading
+    case finished(Result<Void, Error>)
+}