damus

LongformPreview.swift (7297B)

---

 //
 //  LongformPreview.swift
 //  damus
 //
 //  Created by William Casarin on 2023-06-01.
 //
 
 import SwiftUI
 import Kingfisher
 
 struct LongformPreviewBody: View {
     let state: DamusState
     let event: LongformEvent
     let options: EventViewOptions
     let header: Bool
     @State var blur_images: Bool = true
     
     @ObservedObject var artifacts: NoteArtifactsModel
 
     init(state: DamusState, ev: LongformEvent, options: EventViewOptions, header: Bool) {
         self.state = state
         self.event = ev
         self.options = options
         self.header = header
 
         self._artifacts = ObservedObject(wrappedValue: state.events.get_cache_data(ev.event.id).artifacts_model)
     }
 
     init(state: DamusState, ev: NostrEvent, options: EventViewOptions, header: Bool) {
         self.state = state
         self.event = LongformEvent.parse(from: ev)
         self.options = options
         self.header = header
 
         self._artifacts = ObservedObject(wrappedValue: state.events.get_cache_data(ev.id).artifacts_model)
     }
 
     func Words(_ words: Int) -> Text {
         let wordCount = pluralizedString(key: "word_count", count: words)
         return Text(wordCount)
     }
     
     var truncate: Bool {
         return options.contains(.truncate_content)
     }
     
     var truncate_very_short: Bool {
         return options.contains(.truncate_content_very_short)
     }
     
     func truncatedText(content: CompatibleText) -> some View {
         Group {
             if truncate_very_short {
                 TruncatedText(text: content, maxChars: 140, show_show_more_button: !options.contains(.no_show_more))
                     .font(header ? .body : .caption)
                     .foregroundColor(.gray)
                     .padding(.horizontal, 10)
             }
             else if truncate {
                 TruncatedText(text: content, show_show_more_button: !options.contains(.no_show_more))
                     .font(header ? .body : .caption)
                     .foregroundColor(.gray)
                     .padding(.horizontal, 10)
             } else {
                 content.text
                     .font(header ? .body : .caption)
                     .foregroundColor(.gray)
                     .padding(.horizontal, 10)
             }
         }
     }
     
     func Placeholder(url: URL) -> some View {
         Group {
             if let meta = state.events.lookup_img_metadata(url: url),
                case .processed(let blurhash) = meta.state {
                 Image(uiImage: blurhash)
                     .resizable()
                     .frame(maxWidth: .infinity, maxHeight: header ? .infinity : 150)
             } else {
                 DamusColors.adaptableWhite
             }
         }
     }
     
     func titleImage(url: URL) -> some View {
         KFAnimatedImage(url)
             .callbackQueue(.dispatch(.global(qos:.background)))
             .backgroundDecode(true)
             .imageContext(.note, disable_animation: state.settings.disable_animation)
             .image_fade(duration: 0.25)
             .cancelOnDisappear(true)
             .configure { view in
                 view.framePreloadCount = 3
             }
             .background {
                 Placeholder(url: url)
             }
             .aspectRatio(contentMode: .fill)
             .frame(maxWidth: .infinity, maxHeight: header ? .infinity : 150)
             .kfClickable()
             .cornerRadius(1)
     }
 
     var body: some View {
         Group {
             if options.contains(.wide) {
                 Main.padding(.horizontal)
             } else {
                 Main
             }
         }
     }
 
     var Main: some View {
         VStack(alignment: .leading, spacing: 10) {
             if let url = event.image {
                 if (self.options.contains(.no_media)) {
                     EmptyView()
                 } else if !blur_images || (!blur_images && !state.settings.media_previews) {
                     titleImage(url: url)
                 } else if blur_images || (blur_images && !state.settings.media_previews) {
                     ZStack {
                         titleImage(url: url)
                         Blur()
                             .onTapGesture {
                                 blur_images = false
                             }
                     }
                 }
             }
             
             Text(event.title ?? NSLocalizedString("Untitled", comment: "Title of longform event if it is untitled."))
                 .font(header ? .title : .headline)
                 .padding(.horizontal, 10)
                 .padding(.top, 5)
             
             if let summary = event.summary {
                 truncatedText(content: CompatibleText(stringLiteral: summary))
             }
             
             if let labels = event.labels {
                 ScrollView(.horizontal) {
                     HStack {
                         ForEach(labels, id: \.self) { label in
                             Text(label)
                                 .font(.caption)
                                 .foregroundColor(.gray)
                                 .padding(EdgeInsets(top: 5, leading: 15, bottom: 5, trailing: 15))
                                 .background(DamusColors.neutral1)
                                 .cornerRadius(20)
                                 .overlay(
                                     RoundedRectangle(cornerRadius: 20)
                                         .stroke(DamusColors.neutral3, lineWidth: 1)
                                 )
                         }
                     }
                 }
                 .scrollIndicators(.hidden)
                 .padding(10)
             }
 
             
             if case .loaded(let arts) = artifacts.state,
                case .longform(let longform) = arts
             {
                 Words(longform.words).font(.footnote)
                     .padding([.horizontal, .bottom], 10)
             }
         }
         .frame(maxWidth: .infinity, alignment: .leading)
         .background(DamusColors.neutral3)
         .cornerRadius(10)
         .overlay(
             RoundedRectangle(cornerRadius: 10)
                 .stroke(DamusColors.neutral1, lineWidth: 1)
         )
         .padding(.top, 10)
         .onAppear {
             blur_images = should_blur_images(settings: state.settings, contacts: state.contacts, ev: event.event, our_pubkey: state.pubkey)
         }
     }
 }
 
 struct LongformPreview: View {
     let state: DamusState
     let event: LongformEvent
     let options: EventViewOptions
 
     init(state: DamusState, ev: NostrEvent, options: EventViewOptions) {
         self.state = state
         self.event = LongformEvent.parse(from: ev)
         self.options = options.union(.no_mentions)
     }
 
     var body: some View {
         EventShell(state: state, event: event.event, options: options) {
             LongformPreviewBody(state: state, ev: event, options: options, header: false)
         }
     }
 }
 
 struct LongformPreview_Previews: PreviewProvider {
     static var previews: some View {
         VStack {
             LongformPreview(state: test_damus_state, ev: test_longform_event.event, options: [])
 
             LongformPreview(state: test_damus_state, ev: test_longform_event.event, options: [.wide])
         }
         .frame(height: 400)
     }
 }