Remove broken code, add beginnings on nextSolarEvents

Sources/SunKit/Solar.swift

@@ -84,10 +84,6 @@ public struct Solar {
         return solars;
     }
 
-    public func solarAngle(hour: int, minute: int, second: int) {
-
-    }
-
     /// TODO: Sunlight angle
     /// TODO: Moon phase
     /// TODO: Moon illumination

Tests/SunKitTests/SolarTests.swift

@@ -129,4 +129,47 @@ struct SolarTests {
         let daylight = try #require(solar.daylight)
         #expect(daylight.duration == 36497.0)
     }
+
+    @Test(.disabled())
+    func nextSolarEvents() async throws {
+        let now = Date.now.addingTimeInterval(60 * 60 * 2)
+        let nextSolarEvent = try #require(now.nextSolarEvents(coordinate: Constant.Cupertino))
+
+        #expect(nextSolarEvent.isSunrise)
+        debugPrint(nextSolarEvent.events.actual)
+    }
+}
+
+private extension Date {
+    static var calendar: Calendar {
+        var calendar = Calendar(identifier: .gregorian)
+        calendar.timeZone = Date.utcTimezone
+
+        return calendar
+    }
+
+    static let utcTimezone = TimeZone(identifier: "UTC")!
+
+    func midnightLocal(timeZone: TimeZone = .current) -> Date {
+        let nowComponents = Date.calendar.dateComponents(in: timeZone, from: self)
+        let midnightComponents = DateComponents(timeZone: timeZone, year: nowComponents.year, month: nowComponents.month, day: nowComponents.day, hour: 0, minute: 0, second: 0)
+        return Date.calendar.date(from: midnightComponents)!
+    }
+
+    func nextSolarEvents(coordinate: CLLocationCoordinate2D, timeZone: TimeZone = .current) -> (isSunrise: Bool, events: SolarEvents)? {
+        let midnightLocal = midnightLocal(timeZone: timeZone)
+
+        let todayAndTomorrow = Solar.makeRange(from: midnightLocal, at: coordinate, forDays: 2)
+        guard let todayDawn = todayAndTomorrow[0].dawn else { return nil }
+        guard let todayDusk = todayAndTomorrow[0].dusk else { return nil }
+        guard let tomorrowDawn = todayAndTomorrow[1].dawn else { return nil }
+
+        if (self < todayDawn.actual) {
+            return (isSunrise: true, todayDawn)
+        } else if (self < todayDusk.actual) {
+            return (isSunrise: false, todayDusk)
+        } else {
+            return (isSunrise: true, tomorrowDawn)
+        }
+    }
 }