Generate first tag pages

CHDataManagement/Views/Posts/AddPostView.swift

@@ -67,6 +67,7 @@ struct AddPostView: View {
 
     private func addNewPost() {
         let post = Post(
+            content: content,
             id: newPostId,
             isDraft: true,
             createdDate: .now,

CHDataManagement/Views/Posts/PostDetailView.swift

@@ -34,10 +34,24 @@ struct PostDetailView: View {
     private var language
 
     @ObservedObject
-    private var item: Post
+    private var post: Post
+
+    @State
+    private var newId: String
 
     init(post: Post) {
-        self.item = post
+        self.post = post
+        self.newId = post.id
+    }
+
+    private let allowedCharactersInPostId = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "-")).inverted
+
+    private var idExists: Bool {
+        post.content.posts.contains { $0.id == newId }
+    }
+
+    private var containsInvalidCharacters: Bool {
+        newId.rangeOfCharacter(from: allowedCharactersInPostId) != nil
     }
 
     var body: some View {
@@ -45,15 +59,19 @@ struct PostDetailView: View {
             VStack(alignment: .leading) {
                 Text("ID")
                     .font(.headline)
-                TextField("", text: $item.id)
-                    .textFieldStyle(.roundedBorder)
-                    .padding(.bottom)
+                HStack {
+                    TextField("", text: $newId)
+                        .textFieldStyle(.roundedBorder)
+                    Button("Update", action: setNewId)
+                    .disabled(newId.isEmpty || containsInvalidCharacters || idExists)
+                }
+                .padding(.bottom)
 
                 HStack {
                     Text("Draft")
                         .font(.headline)
                     Spacer()
-                    Toggle("", isOn: $item.isDraft)
+                    Toggle("", isOn: $post.isDraft)
                         .toggleStyle(.switch)
                 }
                 .padding(.bottom)
@@ -62,7 +80,7 @@ struct PostDetailView: View {
                     Text("Start")
                         .font(.headline)
                     Spacer()
-                    DatePicker("", selection: $item.startDate, displayedComponents: .date)
+                    DatePicker("", selection: $post.startDate, displayedComponents: .date)
                         .datePickerStyle(.compact)
                         .padding(.bottom)
                 }
@@ -71,34 +89,42 @@ struct PostDetailView: View {
                     Text("Has end date")
                         .font(.headline)
                     Spacer()
-                    Toggle("", isOn: $item.hasEndDate)
+                    Toggle("", isOn: $post.hasEndDate)
                         .toggleStyle(.switch)
                         .padding(.bottom)
                 }
 
-                if item.hasEndDate {
+                if post.hasEndDate {
                     HStack(alignment: .firstTextBaseline) {
                         Text("End date")
                             .font(.headline)
                         Spacer()
-                        DatePicker("", selection: $item.endDate, displayedComponents: .date)
+                        DatePicker("", selection: $post.endDate, displayedComponents: .date)
                             .datePickerStyle(.compact)
                             .padding(.bottom)
                     }
                 }
 
-                LocalizedPostDetailView(post: item.localized(in: language))
+                LocalizedPostDetailView(post: post.localized(in: language))
 
             }
             .padding()
         }
     }
+
+    private func setNewId() {
+        guard post.update(id: newId) else {
+            newId = post.id
+            return
+        }
+        post.id = newId
+    }
 }
 
 extension PostDetailView: MainContentView {
 
     init(item: Post) {
-        self.item = item
+        self.init(post: item)
     }
 
     static let itemDescription = "a post"