Impressia/Vernissage/Widgets/UserAvatar.swift

//
//  https://mczachurski.dev
//  Copyright © 2023 Marcin Czachurski and the repository contributors.
//  Licensed under the MIT License.
//

import SwiftUI
import NukeUI

struct UserAvatar: View {
    @EnvironmentObject var applicationState: ApplicationState
    
    public enum Size {
        case list, comment, profile
      
        public var size: CGSize {
            switch self {
            case .list:
                return .init(width: 48, height: 48)
            case .comment:
                return .init(width: 32, height: 32)
            case .profile:
                return .init(width: 96, height: 96)
            }
        }
    }
    
    public let accountAvatar: URL?
    public let size: Size
    
    public init(accountAvatar: URL?, size: Size = .list) {
      self.accountAvatar = accountAvatar
      self.size = size
    }
    
    var body: some View {
        Group {
            if let accountAvatar {
                if let cachedAvatar = CacheImageService.shared.getImage(for: accountAvatar) {
                    cachedAvatar
                        .resizable()
                        .clipShape(applicationState.avatarShape.shape())
                        .aspectRatio(contentMode: .fit)
                        .frame(width: size.size.width, height: size.size.height)
                } else {
                    LazyImage(url: accountAvatar) { state in
                        if let image = state.image {
                            image
                                .clipShape(applicationState.avatarShape.shape())
                                .aspectRatio(contentMode: .fit)
                        } else if state.isLoading {
                            placeholderView
                        } else {
                            placeholderView
                        }
                    }
                    .priority(.high)
                    .frame(width: size.size.width, height: size.size.height)
                }
            } else {
                placeholderView
                    .frame(width: size.size.width, height: size.size.height)
            }
        }
    }
    
    @ViewBuilder private var placeholderView: some View {
        Image("Avatar")
            .resizable()
            .clipShape(applicationState.avatarShape.shape())
            .aspectRatio(contentMode: .fit)
    }
}