Proyectos de Subversion Iphone Microlearning - Inconcert

//
//  GridCapsuleView.swift
//  twogetskills
//
//  Created by Efrain Yanez Recanatini on 2/17/22.
//

import SwiftUI

struct GridCapsuleView: View
{
    @EnvironmentObject private var networkMonitor : NetworkMonitor
    @EnvironmentObject private var appNavigation : AppNavigation
    
    @State private var scrollToIndex : Int = 0
    @ObservedObject private var viewModel : CapsuleGridViewModel = CapsuleGridViewModel()
  
    private let itemPerRow: CGFloat = 2
    private let config = [
        GridItem(.flexible()),
        GridItem(.flexible())
    ]
    
    private var appData = AppData.sharedInstance
    private var topicTitle : String = ""
    private let capsuleUuidActive  : String
    

    init(preview : Bool = false)
    {
        self.capsuleUuidActive  = appData.capsuleUuidActive
        
        let topicDao = TopicDao.sharedInstance
        let topicModel = topicDao.selectByUuid(uuid: appData.topicUuidActive)
        
        viewModel.fetch(topicUuid: appData.topicUuidActive, userUuid: appData.userUuid)

       
        if topicModel.name.count > Constants.APP_BAR_TITLE_MAX_LENGTH {
            topicTitle = String(Array(topicModel.name)[0...Constants.APP_BAR_TITLE_MAX_LENGTH]) + "..."
        } else {
            topicTitle = topicModel.name
        }
    }
    
    var body: some View {
        VStack(spacing: 0) {
            HStack {
                Button(action: {
                    appData.capsuleUuidActive = ""
                    appData.slideUuidActive = ""
                    appData.save()

                    withAnimation {
                        appNavigation.subpageActive = .topics
                    }
                    
                }, label: {

                    
                    Image(systemName: "chevron.backward")
                    .frame(width: 32, height: 32, alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/)
                    .aspectRatio(contentMode: .fit)
                    .foregroundColor(networkMonitor.status == .disconnected ? Color("color_network_disconnected_foreground") : Color("color_app_bar_foreground"))
                })
                .padding(.leading, 16)
                
                Text(networkMonitor.status == .disconnected ? Config.LANG_ERROR_NETWORK_MESSAGE_SHORT : topicTitle)
                .font(Font.custom(Config.FONT_NAME_REGULAR, size: Config.FONT_SIZE_APP_BAR_HEAD1 ))
                    .foregroundColor(networkMonitor.status == .disconnected ? Color("color_network_disconnected_foreground") : Color("color_app_bar_foreground"))
                    .padding(.leading, 4)
                
                Spacer()
            }
            .edgesIgnoringSafeArea(.top)
            .frame(height: 50)
            .background(networkMonitor.status == .disconnected ? Color("color_network_disconnected_background") : Color("color_app_bar_background"))
    
    
            Divider().background(networkMonitor.status == .disconnected ? Color("color_network_disconnected_background") : Color("color_app_bar_background"))
    
            ScrollView() {
                ScrollViewReader { proxy in
                    LazyVGrid(columns: config, alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/, spacing: /*@START_MENU_TOKEN@*/nil/*@END_MENU_TOKEN@*/, pinnedViews: /*@START_MENU_TOKEN@*/[]/*@END_MENU_TOKEN@*/, content:
                    {
                        
                        
                        ForEach(0..<self.viewModel.capsules.count) { index in
                            
                
                            
                  
                            CardCapsuleView(
                                capsuleUuid: self.viewModel.capsules[index].uuid
                            )
                            .environmentObject(appNavigation)
                            .frame(
                                width: Constants.CARD_WIDTH,
                                height: Constants.CARD_HEIGHT,
                                alignment: .center
                            ).id(index)

                        }
                      
                        .onChange(of:  scrollToIndex, perform: { value in
                            proxy.scrollTo(value, anchor: nil)
                        })
                    })
                }
            }
            .padding(.top, 5)
        
        }

        .onAppear {
            var i : Int = 0
            while i < self.viewModel.capsules.count {
                if self.capsuleUuidActive == self.viewModel.capsules[i].uuid {
                    self.scrollToIndex = i
                }
                i += 1
            }
        }
       

        

    }
}


struct GridCapsuleView_Previews: PreviewProvider {
    static var previews: some View {
        GridCapsuleView( preview: true)
    }
}