Add onboarding screen iOS

ios/circolapp/circolapp.xcodeproj/project.pbxproj

@@ -13,6 +13,7 @@
 		954E68352574E3890034EBA8 /* iOSServerApi.swift in Sources */ = {isa = PBXBuildFile; fileRef = 954E68342574E3890034EBA8 /* iOSServerApi.swift */; };
 		954E683D2574ED9E0034EBA8 /* UserDefaultsExtensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 954E683C2574ED9E0034EBA8 /* UserDefaultsExtensions.swift */; };
 		9553DB09257173ED006AE167 /* iOSRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9553DB08257173ED006AE167 /* iOSRepository.swift */; };
+		9554BDB8257E498F00D8925B /* OnboardingView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9554BDB7257E498F00D8925B /* OnboardingView.swift */; };
 		955B7A0E257D098C0091B1F9 /* SearchBar.swift in Sources */ = {isa = PBXBuildFile; fileRef = 955B7A0D257D098C0091B1F9 /* SearchBar.swift */; };
 		955B7A10257D10A70091B1F9 /* ViewControllerResolver.swift in Sources */ = {isa = PBXBuildFile; fileRef = 955B7A0F257D10A70091B1F9 /* ViewControllerResolver.swift */; };
 		95906F48257508660060F5D0 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 95906F47257506360060F5D0 /* Assets.xcassets */; };
@@ -51,6 +52,7 @@
 		954E68342574E3890034EBA8 /* iOSServerApi.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = iOSServerApi.swift; sourceTree = "<group>"; };
 		954E683C2574ED9E0034EBA8 /* UserDefaultsExtensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDefaultsExtensions.swift; sourceTree = "<group>"; };
 		9553DB08257173ED006AE167 /* iOSRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = iOSRepository.swift; sourceTree = "<group>"; };
+		9554BDB7257E498F00D8925B /* OnboardingView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OnboardingView.swift; sourceTree = "<group>"; };
 		955B7A0D257D098C0091B1F9 /* SearchBar.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SearchBar.swift; sourceTree = "<group>"; };
 		955B7A0F257D10A70091B1F9 /* ViewControllerResolver.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewControllerResolver.swift; sourceTree = "<group>"; };
 		95906F47257506360060F5D0 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
@@ -106,6 +108,7 @@
 				9512D3C0257AB4F60023C3A1 /* NewReminderView.swift */,
 				955B7A0D257D098C0091B1F9 /* SearchBar.swift */,
 				955B7A0F257D10A70091B1F9 /* ViewControllerResolver.swift */,
+				9554BDB7257E498F00D8925B /* OnboardingView.swift */,
 			);
 			path = View;
 			sourceTree = "<group>";
@@ -291,6 +294,7 @@
 				9512D3C1257AB4F60023C3A1 /* NewReminderView.swift in Sources */,
 				954E683D2574ED9E0034EBA8 /* UserDefaultsExtensions.swift in Sources */,
 				955B7A0E257D098C0091B1F9 /* SearchBar.swift in Sources */,
+				9554BDB8257E498F00D8925B /* OnboardingView.swift in Sources */,
 				95C46A51255D3A34007A75E5 /* CircularViewModel.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

ios/circolapp/circolapp/View/ContentView.swift

@@ -23,6 +23,7 @@ import Shared
 struct ContentView: View {
     @ObservedObject var circularViewModel = CircularViewModel(repository: iOSRepository.getCircularRepository())
     @ObservedObject var searchBar: SearchBar = SearchBar(placeholder: "Search circulars")
+    @State var showOnboarding = !UserDefaults.standard.bool(forKey: "skipOnboarding")
     
     var body: some View {
         NavigationView {
@@ -40,6 +41,10 @@ struct ContentView: View {
             .onDisappear(perform: {
                 self.circularViewModel.stopObserving()
             })
+        }.sheet(isPresented: self.$showOnboarding, onDismiss: {
+            UserDefaults.standard.set(true, forKey: "skipOnboarding")
+        }) {
+            OnboardingView()
         }
         
         Divider()

ios/circolapp/circolapp/View/OnboardingView.swift

@@ -0,0 +1,60 @@
+/*
+ * Circolapp
+ * Copyright (C) 2019-2020  Matteo Schiff
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import SwiftUI
+import Combine
+import Shared
+
+struct OnboardingView: View {
+    @State private var school = 0
+    @Environment(\.presentationMode) var presentationMode
+    private let serverCompanion = ServerAPI.Companion()
+    
+    var body: some View {
+        NavigationView {
+            VStack {
+                Text("Choose your school")
+                    .font(.headline)
+                    .padding()
+                Form {
+                    Picker("School", selection: $school) {
+                        ForEach(0..<Int(serverCompanion.numberOfServers)) { serverID in
+                            let server = serverCompanion.getServer(serverID: Int32(serverID))
+                            Text(serverCompanion.getServerName(server: server))
+                        }
+                    }
+                    .onReceive([self.school].publisher.first()) { value in
+                        UserDefaults.standard.set(value, forKey: "school")
+                    }
+                }
+                .navigationBarTitle("Welcome to CircolApp")
+                .navigationBarItems(trailing: Button(action: {
+                    self.presentationMode.wrappedValue.dismiss()
+                }) {
+                    Text("Done")
+                })
+            }
+        }
+    }
+}
+
+struct OnboardingView_Previews: PreviewProvider {
+    static var previews: some View {
+        OnboardingView()
+    }
+}

shared/src/commonMain/kotlin/net/underdesk/circolapp/shared/server/ServerAPI.kt

@@ -60,6 +60,8 @@ class ServerAPI(serverName: Servers) {
             SUCCESS, ERROR
         }
 
+        val numberOfServers = Servers.values().size
+
         fun getServer(serverID: Int): Servers {
             return Servers.values()[serverID]
         }