✨ Initial iOS widget target

ios/SolarWidget/CheckInWidget.swift

@@ -0,0 +1,98 @@
+//
+//  SolarWidget.swift
+//  SolarWidget
+//
+//  Created by LittleSheep on 2024/12/14.
+//
+
+import WidgetKit
+import SwiftUI
+
+struct Provider: TimelineProvider {
+    func placeholder(in context: Context) -> SimpleEntry {
+        SimpleEntry(date: Date(), user: nil, checkIn: nil)
+    }
+
+    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
+        let prefs = UserDefaults(suiteName: "group.solsynth.solian")
+        
+        let jsonDecoder = JSONDecoder()
+        jsonDecoder.dateDecodingStrategy = .iso8601
+        jsonDecoder.keyDecodingStrategy = .convertFromSnakeCase
+        
+        let userRaw = prefs?.string(forKey: "user")
+        var user: SolarUser?
+        if let userRaw = userRaw {
+            user = try! jsonDecoder.decode(SolarUser.self, from: userRaw.data(using: .utf8)!)
+        }
+        
+        let checkInRaw = prefs?.string(forKey: "today_check_in")
+        var checkIn: SolarCheckInRecord?
+        if let checkInRaw = checkInRaw {
+            checkIn = try! jsonDecoder.decode(SolarCheckInRecord.self, from: checkInRaw.data(using: .utf8)!)
+        }
+        
+        let entry = SimpleEntry(
+            date: Date(),
+            user: user,
+            checkIn: checkIn
+        )
+        completion(entry)
+    }
+
+    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
+        getSnapshot(in: context) { (entry) in
+            let timeline = Timeline(entries: [entry], policy: .atEnd)
+            completion(timeline)
+        }
+    }
+}
+
+struct SimpleEntry: TimelineEntry {
+    let date: Date
+    let user: SolarUser?
+    let checkIn: SolarCheckInRecord?
+}
+
+struct SolarWidgetEntryView : View {
+    var entry: Provider.Entry
+
+    var body: some View {
+        VStack(alignment: .leading) {
+            if let user = entry.user {
+                Text("User")
+                Text("\(user.name)")
+            }
+        }
+    }
+}
+
+struct CheckInWidget: Widget {
+    let kind: String = "SolarWidget"
+
+    var body: some WidgetConfiguration {
+        StaticConfiguration(kind: kind, provider: Provider()) { entry in
+            if #available(iOS 17.0, *) {
+                SolarWidgetEntryView(entry: entry)
+                    .containerBackground(.fill.tertiary, for: .widget)
+            } else {
+                SolarWidgetEntryView(entry: entry)
+                    .padding()
+                    .background()
+            }
+        }
+        .configurationDisplayName("Solar Overview")
+        .description("Get Instant Insights on your home screen")
+    }
+}
+
+#Preview(as: .systemSmall) {
+    CheckInWidget()
+} timeline: {
+    SimpleEntry(date: .now, user: nil, checkIn: nil)
+    SimpleEntry(
+        date: .now,
+        user: SolarUser(id: 1, name: "demo", nick: "Deemo"),
+        checkIn: SolarCheckInRecord(id: 1, resultTier: 1, createdAt: Date.now)
+    )
+}