1import SwiftUI
2import Photos
3
4/// Renders a small heart to indicate a photo is a "Favorite".
5///
6/// This is meant to match the way favorite items are marked in Photos.
7struct FavoriteHeartIcon: ViewModifier {
8    let isFavorite: Bool
9    let isFocused: Bool
10    
11    init(_ isFavorite: Bool, _ isFocused: Bool) {
12        self.isFavorite = isFavorite
13        self.isFocused = isFocused
14    }
15    
16    func body(content: Content) -> some View {
17        if isFavorite {
18            content.overlay(alignment: Alignment(horizontal: .leading, vertical: .bottom)) {
19                Image(systemName: "heart.fill")
20                    .foregroundColor(.white)
21                    .padding(3)
22                    .font(isFocused ? .title3 : .body)
23                    .shadow(radius: 2.0)
24            }
25        } else {
26            content
27        }
28    }
29}
30
31extension View {
32    func favoriteHeartIcon(_ isFavorite: Bool, _ isFocused: Bool) -> some View {
33        modifier(FavoriteHeartIcon(isFavorite, isFocused))
34    }
35}