NetNewsWire/Widget/TimelineProvider.swift

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Swift
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//
// TimelineProvider.swift
// NetNewsWire Widget Extension
//
// Created by Stuart Breckenridge on 18/11/20.
// Copyright © 2020 Ranchero Software. All rights reserved.
//
import WidgetKit
import SwiftUI
struct Provider: TimelineProvider {
func placeholder(in context: Context) -> WidgetTimelineEntry {
do {
let data = try WidgetDataDecoder.decodeWidgetData()
return WidgetTimelineEntry(date: Date(), widgetData: data)
} catch {
return WidgetTimelineEntry(date: Date(), widgetData: WidgetDataDecoder.sampleData())
}
}
func getSnapshot(in context: Context, completion: @escaping (WidgetTimelineEntry) -> Void) {
if context.isPreview {
do {
let data = try WidgetDataDecoder.decodeWidgetData()
completion(WidgetTimelineEntry(date: Date(), widgetData: data))
} catch {
completion(WidgetTimelineEntry(date: Date(),
widgetData: WidgetDataDecoder.sampleData()))
}
} else {
do {
let widgetData = try WidgetDataDecoder.decodeWidgetData()
let entry = WidgetTimelineEntry(date: Date(), widgetData: widgetData)
completion(entry)
} catch {
let entry = WidgetTimelineEntry(date: Date(),
widgetData: WidgetDataDecoder.sampleData())
completion(entry)
}
}
}
func getTimeline(in context: Context, completion: @escaping (Timeline<WidgetTimelineEntry>) -> Void) {
// Create current timeline entry for now.
let date = Date()
var entry: WidgetTimelineEntry
do {
let widgetData = try WidgetDataDecoder.decodeWidgetData()
entry = WidgetTimelineEntry(date: date, widgetData: widgetData)
} catch {
entry = WidgetTimelineEntry(date: date, widgetData: WidgetData(currentUnreadCount: 0, currentTodayCount: 0, currentStarredCount: 0, unreadArticles: [], starredArticles: [], todayArticles: [], lastUpdateTime: Date()))
}
// Configure next update in 1 hour.
let nextUpdateDate = Calendar.current.date(byAdding: .hour, value: 1, to: date)!
let timeline = Timeline(
entries:[entry],
policy: .after(nextUpdateDate))
completion(timeline)
}
public typealias Entry = WidgetTimelineEntry
}
struct WidgetTimelineEntry: TimelineEntry {
public let date: Date
public let widgetData: WidgetData
}