From f9f548183b8cad9aa921f5dc0dd6ccda33af3d47 Mon Sep 17 00:00:00 2001
From: Alan Francis <acf@alancfrancis.com>
Date: Tue, 4 Jul 2023 14:32:21 +0100
Subject: [PATCH] Part 4: Show the Things

---
 WidgetShared/JustOneThingProvider.swift | 56 ++++++++++++++++++-------
 WidgetShared/JustOneThingWidget.swift   |  6 +--
 2 files changed, 44 insertions(+), 18 deletions(-)

diff --git a/WidgetShared/JustOneThingProvider.swift b/WidgetShared/JustOneThingProvider.swift
index b1fdd4f..7deee7f 100644
--- a/WidgetShared/JustOneThingProvider.swift
+++ b/WidgetShared/JustOneThingProvider.swift
@@ -9,32 +9,51 @@ import WidgetKit
 import SwiftUI
 import Intents
 
+struct ThingDataStore {
+    public var things:[Thing] = [
+        Thing(text: "The First Thing", createdAt: Date()),
+        Thing(text: "The Second Thing", createdAt: Date()),
+        Thing(text: "The Third Thing", createdAt: Date()),
+        Thing(text: "The Fourth Thing", createdAt: Date()),
+        Thing(text: "The Fifth Thing", createdAt: Date()),
+        Thing(text: "The Sixth Thing", createdAt: Date()),
+    ]
+    
+    public var shuffledThings:[Thing] {
+        things.shuffled()
+    }
+}
+
+extension Date {
+    mutating public func withAddedMinutes(_ minutes:Double) -> Date {
+        self.addTimeInterval(minutes*60)
+        return self
+    }
+}
+
 struct ThingProvider: IntentTimelineProvider {
+    var thingStore:ThingDataStore = ThingDataStore()
+    
     func placeholder(in context: Context) -> ThingEntry {
-        ThingEntry(date: Date(), configuration: ConfigurationIntent(), thing: .placeholder)
+        ThingEntry(thing: .placeholder)
     }
 
     func getSnapshot(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (ThingEntry) -> ()) {
-        let entry = ThingEntry(date: Date(), configuration: configuration, thing: .placeholder)
-        context.
-        completion(entry)
+        completion(ThingEntry(thing: .placeholder, config: configuration))
     }
 
     func getTimeline(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (Timeline<ThingEntry>) -> ()) {
-        var entries: [ThingEntry] = []
-
-        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
-        let currentDate = Date()
-        for hourOffset in 0 ..< 5 {
-            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
-            let entry = ThingEntry(date: entryDate, configuration: configuration, thing: .placeholder)
-            entries.append(entry)
+        var timestamp = Date.now
+        let entries = thingStore.shuffledThings.map {
+            ThingEntry(thing: $0,
+                       timelineDate: timestamp.withAddedMinutes(15),
+                       config: configuration)
         }
-
-        let timeline = Timeline(entries: entries, policy: .atEnd)
-        completion(timeline)
+        completion(Timeline(entries: entries, policy: .atEnd))
     }
+}
 
+extension ThingProvider {
     func recommendations() -> [IntentRecommendation<ConfigurationIntent>] {
         return [
             IntentRecommendation(intent: ConfigurationIntent(), description: "My Intent Widget")
@@ -42,8 +61,15 @@ struct ThingProvider: IntentTimelineProvider {
     }
 }
 
+
 struct ThingEntry: TimelineEntry {
     let date: Date
     let configuration: ConfigurationIntent
     let thing: Thing
+    
+    public init(thing:Thing, timelineDate:Date = .now, config:ConfigurationIntent = ConfigurationIntent()) {
+        self.thing = thing
+        self.date = timelineDate
+        self.configuration = config
+    }
 }
diff --git a/WidgetShared/JustOneThingWidget.swift b/WidgetShared/JustOneThingWidget.swift
index 23412ed..62a8d85 100644
--- a/WidgetShared/JustOneThingWidget.swift
+++ b/WidgetShared/JustOneThingWidget.swift
@@ -18,10 +18,10 @@ struct JustOneThingWidgetBundle: WidgetBundle {
 
 
 struct ThingEntryView : View {
-    var entry: ThingProvider.Entry
+    var entry: ThingEntry
 
     var body: some View {
-        Text(entry.date, style: .time)
+        Text(entry.thing.text)
     }
 }
 
@@ -41,7 +41,7 @@ struct JustOneThingWidget: Widget {
 
 struct Widget_Previews: PreviewProvider {
     static var previews: some View {
-        ThingEntryView(entry: ThingEntry(date: Date(), configuration: ConfigurationIntent(), thing: .placeholder))
+        ThingEntryView(entry: ThingEntry(thing: .placeholder))
         #if os(watchOS)
             .previewContext(WidgetPreviewContext(family: .accessoryRectangular))
         #else