[CHANGE] UI fixes and SwiftUI previews for easier development

AltStore/View Components/AppIconView.swift

@@ -36,3 +36,26 @@ extension AppIconView: Equatable {
         lhs.iconUrl == rhs.iconUrl && lhs.cornerRadius == rhs.cornerRadius
     }
 }
+
+
+import AltStoreCore
+
+struct AppIconView_Previews: PreviewProvider {
+
+    static let context = DatabaseManager.shared.viewContext
+    static let app = StoreApp.makeAltStoreApp(in: context)
+
+    static var previews: some View {
+        HStack {
+            AppIconView(iconUrl: app.iconURL)
+
+            VStack(alignment: .leading) {
+                Text(app.name)
+                    .bold()
+                Text(app.developerName)
+                    .font(.callout)
+                    .foregroundColor(.secondary)
+            }
+        }
+    }
+}

AltStore/View Components/AppPillButton.swift

@@ -100,8 +100,45 @@ struct AppPillButton: View {
     }
 }
 
-//struct AppPillButton_Previews: PreviewProvider {
-//    static var previews: some View {
-//        AppPillButton()
-//    }
-//}
+struct AppPillButton_Previews: PreviewProvider {
+
+    static let context = DatabaseManager.shared.viewContext
+    static let app = StoreApp.makeAltStoreApp(in: context)
+    static let installedApp = InstalledApp.fetchAltStore(in: context)
+
+    static var previews: some View {
+        VStack {
+            self.preview(for: app)
+
+            self.preview(for: installedApp!)
+
+            self.preview(for: installedApp!, showRemainingDays: true)
+        }
+        .padding()
+    }
+
+    @ViewBuilder
+    static func preview(for app: AppProtocol, showRemainingDays: Bool = false) -> some View {
+        HintView(backgroundColor: Color(UIColor.secondarySystemBackground)) {
+            HStack {
+                AppIconView(iconUrl: self.app.iconURL)
+
+                VStack(alignment: .leading) {
+                    Text(app is StoreApp ? "Store App" : "Installed App")
+                        .bold()
+                    Text(
+                        app is StoreApp ?
+                            "Can be installed" :
+                            showRemainingDays ? "Can be refreshed" : "Can be opened"
+                    )
+                    .font(.callout)
+                    .foregroundColor(.secondary)
+                }
+
+                Spacer()
+
+                AppPillButton(app: app, showRemainingDays: showRemainingDays)
+            }
+        }
+    }
+}

AltStore/View Components/AppScreenshot.swift

@@ -41,9 +41,15 @@ extension AppScreenshot {
 }
 
 
+import AltStoreCore
+
 struct AppScreenshot_Previews: PreviewProvider {
 
+    static let context = DatabaseManager.shared.viewContext
+    static let app = StoreApp.makeAltStoreApp(in: context)
+
     static var previews: some View {
-        AppScreenshot(url: URL(string: "https://apps.sidestore.io/apps/sidestore/v0.1.1/browse-dark.png")!)
+        AppScreenshot(url: app.screenshotURLs[0])
+            .padding()
     }
 }

AltStore/View Components/ModalNavigationLink.swift

@@ -14,6 +14,16 @@ struct ModalNavigationLink<Label: View, Modal: View>: View {
 
     @State var isPresentingModal: Bool = false
 
+    init(@ViewBuilder modal: @escaping () -> Modal, @ViewBuilder label: @escaping () -> Label) {
+        self.modal = modal
+        self.label = label
+    }
+
+    init(_ title: String, @ViewBuilder modal: @escaping () -> Modal) where Label == Text {
+        self.modal = modal
+        self.label = { Text(title) }
+    }
+
     var body: some View {
         SwiftUI.Button {
             self.isPresentingModal = true
@@ -26,8 +36,10 @@ struct ModalNavigationLink<Label: View, Modal: View>: View {
     }
 }
 
-//struct ModalNavigationLink_Previews: PreviewProvider {
-//    static var previews: some View {
-//        ModalNavigationLink()
-//    }
-//}
+struct ModalNavigationLink_Previews: PreviewProvider {
+    static var previews: some View {
+        ModalNavigationLink("Present Modal") {
+            Text("Modal")
+        }
+    }
+}