Combine examples

Other Projects/GitHub Search/GitHubSearchWithSwiftUI/View/RepositoryListView.swift

@@ -10,27 +10,51 @@ import SwiftUI
 
 struct RepositoryListView : View {
 
-    @EnvironmentObject private var viewModel: RepositoryListViewModel
-    @State private var text: String = ""
+    @ObjectBinding
+    private(set) var viewModel: RepositoryListViewModel
 
     var body: some View {
 
         NavigationView {
 
-            TextField($text,
-                      placeholder: Text("Search reposipories..."),
-                      onCommit: { self.viewModel.search(query: self.text) })
+            VStack {
+            HStack {
+
+                TextField($viewModel.text,
+                          placeholder: Text("Search reposipories..."),
+                          onCommit: { self.viewModel.search() })
+                    .frame(height: 40)
+                    .padding(EdgeInsets(top: 0, leading: 8, bottom: 0, trailing: 8))
+                    .border(Color.gray, cornerRadius: 8)
+                    .padding(EdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16))
+
+                Button(action: { self.viewModel.search() }) {
+                    Text("Search")
+                }
                 .frame(height: 40)
                 .padding(EdgeInsets(top: 0, leading: 8, bottom: 0, trailing: 8))
-                .border(Color.gray, cornerRadius: 8)
-                .padding(EdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16))
+                .border(Color.blue, cornerRadius: 8)
+                .padding(EdgeInsets(top: 0, leading: 0, bottom: 0, trailing: 16))
+            }
 
             List {
 
+                viewModel.errorMessage.map(Text.init)?
+                    .lineLimit(nil)
+                    .multilineTextAlignment(.center)
+
                 ForEach(viewModel.repositories.identified(by: \.id)) { repository in
-                     RepositoryView(repository: repository)
+
+                    NavigationLink(destination:
+                        WebView(url: repository.htmlUrl)
+                            .navigationBarTitle(Text(repository.fullName))
+                    ) {
+
+                        RepositoryView(repository: repository)
+                    }
                 }
             }
+            }
             .navigationBarTitle(Text("Search🔍"))
         }
     }

Other Projects/GitHub Search/GitHubSearchWithSwiftUI/View/RepositoryListViewModel.swift

@@ -11,39 +11,60 @@ import Foundation
 import SwiftUI
 
 final class RepositoryListViewModel: BindableObject {
+    typealias SearchRepositories = (String) -> AnyPublisher<Result<[Repository], ErrorResponse>, Never>
 
     let didChange: AnyPublisher<RepositoryListViewModel, Never>
     private let _didChange = PassthroughSubject<RepositoryListViewModel, Never>()
 
     private let _searchWithQuery = PassthroughSubject<String, Never>()
-    private lazy var repositoriesAssign = Subscribers.Assign(object: self, keyPath: \.repositories)
+    private var cancellables: [AnyCancellable] = []
 
     private(set) var repositories: [Repository] = [] {
         didSet {
-            // TODO: Do not want to use DispatchQueue.main here
-            DispatchQueue.main.async {
-                self._didChange.send(self)
-            }
+            _didChange.send(self)
         }
     }
-
-    deinit {
-        repositoriesAssign.cancel()
+    private(set) var errorMessage: String? {
+        didSet {
+            _didChange.send(self)
+        }
     }
+    var text: String = ""
+
+    init<S: Scheduler>(searchRepositories: @escaping SearchRepositories = RepositoryAPI.search,
+                       mainScheduler: S) {
 
-    init() {
         self.didChange = _didChange.eraseToAnyPublisher()
 
-        _searchWithQuery
-            .flatMap { query -> AnyPublisher<[Repository], Never> in
-                RepositoryAPI.search(query: query)
-                    .replaceError(with: [])
+        let response = _searchWithQuery
+            .filter { !$0.isEmpty }
+            .debounce(for: .milliseconds(300), scheduler: mainScheduler)
+            .flatMapLatest { query -> AnyPublisher<([Repository], String?), Never> in
+                searchRepositories(query)
+                    .map { result -> ([Repository], String?) in
+                        switch result {
+                        case let .success(repositories):
+                            return (repositories, nil)
+                        case let .failure(response):
+                            return ([], response.message)
+                        }
+                    }
                     .eraseToAnyPublisher()
             }
-            .receive(subscriber: repositoriesAssign)
+            .receive(on: mainScheduler)
+            .share()
+
+        cancellables += [
+            response
+                .map { $0.0 }
+                .assign(to: \.repositories, on: self),
+            response
+                .map { $0.1 }
+                .assign(to: \.errorMessage, on: self)
+        ]
     }
 
-    func search(query: String) {
-        _searchWithQuery.send(query)
+    func search() {
+        _searchWithQuery.send(text)
     }
 }

Other Projects/GitHub Search/GitHubSearchWithSwiftUI/View/WebView.swift

@@ -0,0 +1,21 @@
+//
+//  WebView.swift
+//  GitHubSearchWithSwiftUI
+//
+//  Created by marty-suzuki on 2019/06/11.
+//  Copyright © 2019 jp.marty-suzuki. All rights reserved.
+//
+
+import SafariServices
+import SwiftUI
+
+struct WebView: UIViewControllerRepresentable {
+
+    let url: URL
+
+    func makeUIViewController(context: UIViewControllerRepresentableContext<WebView>) -> SFSafariViewController {
+        return SFSafariViewController(url: url)
+    }
+
+    func updateUIViewController(_ uiViewController: SFSafariViewController, context: UIViewControllerRepresentableContext<WebView>) {}
+}