.swift

struct Provider: TimelineProvider {
     // Provides a placeholder entry while the widget is loading.
    func placeholder(in context: Context) -> DayEntry {
        DayEntry(date: Date(), configuration: ConfigurationIntent())
    }

    // Provides a snapshot of the widget's current state.
    func getSnapshot(in context: Context, completion: @escaping (DayEntry) -> ()) {
        let entry = DayEntry(date: Date(), configuration: ConfigurationIntent())
        completion(entry)
    }

    // Provides a timeline of entries for the widget.
    func getTimeline(in context: Context, completion: @escaping (Timeline<DayEntry>) -> ()) {
        var entries: [DayEntry] = []
        
        // Generate a timeline consisting of seven entries an day apart, starting from the current date.
        let currentDate = Date()
        for dayOffset in 0 ..< 7 {
            let entryDate = Calendar.current.date(byAdding: .day, value: dayOffset, to: currentDate)!
            let startOfDate = Calendar.current.startOfDay(for: entryDate)
            let entry = DayEntry(date: startOfDate, configuration: ConfigurationIntent())
            entries.append(entry)
            
            let timeline = Timeline(entries: entries, policy: .atEnd)
            completion(timeline)
        }
    }
}