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//
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//  GridGalleryView.swift
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//  twogetskills
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//
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//  Created by Efrain Yanez Recanatini on 3/7/22.
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//
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import Foundation
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import SwiftUI
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struct GridGalleryView: View {
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    @EnvironmentObject private var networkMonitor : NetworkMonitor
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    @EnvironmentObject private var appNavigation : AppNavigation
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    @ObservedObject private var viewModel : GalleryGridViewModel = GalleryGridViewModel()
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    private var appData = AppData.sharedInstance
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    private var capsuleTitle : String = ""
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    init()
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    {
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        self.viewModel.fetch(capsuleUuid: appData.capsuleUuidActive, userUuid: appData.userUuid)
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        let capsuleDao = CapsuleDao.sharedInstance
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        let capsule = capsuleDao.selectByUuid(uuid: appData.capsuleUuidActive)
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        if capsule.name.count > Constants.APP_BAR_TITLE_MAX_LENGTH {
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            capsuleTitle = String(Array(capsule.name)[0...Constants.APP_BAR_TITLE_MAX_LENGTH]) + "..."
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        } else {
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            capsuleTitle = capsule.name
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        }
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    }
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    @ViewBuilder
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    var body: some View {
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        GeometryReader { geometry in
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        ZStack {
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            if self.viewModel.hasPrevious()  {
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                Button(action: {
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                    print("Button previouse")
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                    self.viewModel.previous()
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                    print("slideActiveIndex: \(self.viewModel.slideActiveIndex)")
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                    self.completeSlide(position: self.viewModel.slideActiveIndex)
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                    appData.slideUuidActive = self.viewModel.slides[self.viewModel.slideActiveIndex].uuid
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                    appData.save()
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                }, label: {
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                    Image(systemName: "arrow.left")
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                })
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                .frame(width: 40.0, height: 40.0, alignment: .center)
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                     .cornerRadius(/*@START_MENU_TOKEN@*/3.0/*@END_MENU_TOKEN@*/)
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                .background(Color("color_button_gallery_background"))
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                .foregroundColor(Color("color_button_gallery_foreground"))
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                    .offset(x: -1 * ((geometry.size.width / 2) - 30), y :  25).zIndex(10000)
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            }
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            if self.viewModel.hasNext() {
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                Button(action: {
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                    print("Button next")
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                    self.viewModel.next()
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                    print("slideActiveIndex: \(self.viewModel.slideActiveIndex)")
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                    self.completeSlide(position: self.viewModel.slideActiveIndex)
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                    appData.slideUuidActive = self.viewModel.slides[self.viewModel.slideActiveIndex].uuid
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                    appData.save()
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                }, label: {
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                    Image(systemName: "arrow.right")
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                })
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                .frame(width: 40.0, height: 40.0, alignment: .center)
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                .background(Color("color_button_gallery_background"))
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                .foregroundColor(Color("color_button_gallery_foreground"))
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                .offset(x: ((geometry.size.width  / 2) - 30), y :  25).zIndex(10000)
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            }
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            VStack(spacing: 0) {
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                HStack {
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                    Button(action: {
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                        appNavigation.subpageActive = .slides
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                    }, label: {
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                        Image(systemName: "chevron.backward")
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                        .frame(width: 32, height: 32, alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/)
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                        .aspectRatio(contentMode: .fit)
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                            .foregroundColor(networkMonitor.status == .disconnected ? Color("color_network_disconnected_foreground") : Color("color_app_bar_foreground"))
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                    })
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                    .padding(.leading, 16)
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                    Text(networkMonitor.status == .disconnected ? Config.LANG_ERROR_NETWORK_MESSAGE_SHORT :  capsuleTitle)
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                    .font(Font.custom(Config.FONT_NAME_REGULAR, size: Config.FONT_SIZE_APP_BAR_HEAD1 ))
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                        .foregroundColor(networkMonitor.status == .disconnected ? Color("color_network_disconnected_foreground") : Color("color_app_bar_foreground"))
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                        .padding(.leading, 4)
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                    Spacer()
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                }
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                .edgesIgnoringSafeArea(.top)
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                .frame(height: 50)
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                .background(networkMonitor.status == .disconnected ? Color("color_network_disconnected_background") : Color("color_app_bar_background"))
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                Divider().background(networkMonitor.status == .disconnected ? Color("color_network_disconnected_background") : Color("color_app_bar_background"))
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                CardGalleryView(
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                    slideUuid:  self.viewModel.slides[self.viewModel.slideActiveIndex].uuid
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                )
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                .environmentObject(appNavigation)
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                Text("slideActive : \(viewModel.slideActiveIndex)")
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                .transition(.slide)
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                .gesture(
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                    DragGesture(minimumDistance: 60).onEnded {
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                        if $0.startLocation.x > $0.location.x {
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                            print("left")
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                            if self.viewModel.hasPrevious()  {
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                                print("hasPrevious")
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                                self.viewModel.previous()
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                                print("slideActiveIndex: \(self.viewModel.slideActiveIndex)")
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                                self.completeSlide(position: self.viewModel.slideActiveIndex)
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                                appData.slideUuidActive = self.viewModel.slides[self.viewModel.slideActiveIndex].uuid
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                                appData.save()
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                            }
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                        } else if $0.startLocation.x < $0.location.x {
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                            print("right")
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                            if self.viewModel.hasNext() {
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                                print("hasNext")
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                                self.viewModel.next()
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                                print("slideActiveIndex: \(self.viewModel.slideActiveIndex)")
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                                self.completeSlide(position: self.viewModel.slideActiveIndex)
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                                appData.slideUuidActive = self.viewModel.slides[self.viewModel.slideActiveIndex].uuid
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                                appData.save()
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                            }
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                        } else {
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                            print("none")
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                        }
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                    })
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                /*
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                TabView(selection: self.$selectedTab) {
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                    ForEach(0..<self.viewModel.slides.count) { index in
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                        CardGalleryView(
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                            slideUuid:  self.viewModel.slides[index].uuid
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                        )
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                        .environmentObject(appNavigation)
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                        .tag(index)
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                        .transition(.slide)
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                    }
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                }
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                //.tabViewStyle(PageTabViewStyle(indexDisplayMode: .automatic))
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                .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
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                .onChange(of: self.selectedTab) { selectedTab in
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                    appData.slideUuidActive = self.viewModel.slides[selectedTab].uuid
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                    appData.save()
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                    completeSlide(position: self.selectedTab)
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                }.onAppear {
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                    var position : Int = 0
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                    var i : Int = 0
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                    while i < self.viewModel.slides.count {
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                        if appData.slideUuidActive == self.viewModel.slides[i].uuid {
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                            position = i
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                        }
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                        i += 1
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                    }
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                    self.selectedTab =  position
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                    completeSlide(position: self.selectedTab)
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                }*/
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            }
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            .onAppear {
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                var position : Int = 0
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                var i : Int = 0
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                while i < self.viewModel.slides.count {
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                    if appData.slideUuidActive == self.viewModel.slides[i].uuid {
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                        position = i
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                    }
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                    i += 1
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                }
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                self.viewModel.slideActiveIndex = position
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            }
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            }
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        }
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    }
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    private func completeSlide(position: Int)
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    {
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        if self.viewModel.slides[position].type == Constants.SLIDE_TYPE_IMAGE {
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            let dataService = DataService()
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            dataService.completeSlide(slide: self.viewModel.slides[position])
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        }
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    }
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}
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struct GridGalleryView_Previews: PreviewProvider {
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    static var previews: some View {
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        //GridGalleryView(capsuleUuid: "C123", position: 2)
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        GridGalleryView()
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    }
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}
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