LockScreenWidget+Provider.swift

// The MIT License (MIT)
//
// Copyright (c) 2020-Present Paweł Wiszenko
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

import WidgetKit

extension LockScreenWidget {
    struct Provider: TimelineProvider {
        func placeholder(in context: Context) -> Entry {
            .placeholder
        }

        func getSnapshot(in context: Context, completion: @escaping (Entry) -> Void) {
            completion(.placeholder)
        }

        func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> Void) {
            let currentDate = Date()
            let midnight = Calendar.current.startOfDay(for: currentDate)

            let hoursPassed = Calendar.current
                .dateComponents([.hour], from: midnight, to: currentDate)
                .hour ?? 0
            let fractionOfDay = Double(hoursPassed) / 24
            let nextDate = midnight.adding(.hour, value: hoursPassed + 1)

            let entry = Entry(date: currentDate, fractionOfDay: fractionOfDay)
            let timeline = Timeline(entries: [entry], policy: .after(nextDate))
            completion(timeline)
        }
    }
}