JuickNext/View/FeedView.swift


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//
//  FeedView.swift
//  tst
//
//  Created by Vitaly Takmazov on 10.12.2019.
//  Copyright © 2019 com.juick. All rights reserved.
//

import SwiftUI

struct FeedView: View {
    @ObservedObject var messageFetcher : MessageFetcher
    
    let feed: Feed
    
    init(_ feed: Feed) {
        self.feed = feed
        messageFetcher = MessageFetcher(url: feed.url)
    }
    
    private var stateContent: AnyView {
        switch messageFetcher.state {
        case nil:
            return AnyView(
                ProgressView()
            )
        case .failure(let error):
            return AnyView(
                Text(error.localizedDescription)
            )
        case .success(let root):
            return AnyView(
                List(root) { (message: Message) in
                    MessageView(message: message)
                }
            )
        }
    }
    
    var body: some View {
        VStack {
            stateContent
        }.toolbar {
            ToolbarItem(placement: .principal) {
                Text(feed.title)
            }
        }
    }
}

struct FeedView_Previews: PreviewProvider {
    static var previews: some View {
        FeedView(Feed(title:"Discover", url: "https://api.juick.com/messages"))
    }
}