2 files changed, 125 insertions, 0 deletions
diff --git a/SolverVTests/Utilities/AppGroupManagerTests.swift b/SolverVTests/Utilities/AppGroupManagerTests.swift
new file mode 100644
index 0000000..9b5e587
--- /dev/null
+++ b/SolverVTests/Utilities/AppGroupManagerTests.swift
@@ -0,0 +1,58 @@
+import XCTest
+@testable import Solverv
+
+final class AppGroupManagerTests: XCTestCase {
+    var manager: AppGroupManager!
+
+    override func setUp() {
+        super.setUp()
+        manager = AppGroupManager()
+        manager.clearAllData()
+    }
+
+    override func tearDown() {
+        super.tearDown()
+        manager.clearAllData()
+    }
+
+    func testSaveAndRetrieveLocation() {
+        let location = AppGroupManager.UserLocation(
+            latitude: 59.9139,
+            longitude: 10.7522,
+            timestamp: "2026-03-23T10:00:00Z",
+            isDefaultLocation: false
+        )
+
+        manager.saveLocation(location)
+        let retrieved = manager.getLocation()
+
+        XCTAssertNotNil(retrieved)
+        XCTAssertEqual(retrieved?.latitude, 59.9139)
+        XCTAssertEqual(retrieved?.longitude, 10.7522)
+    }
+
+    func testSaveAndRetrieveSunTimes() {
+        let sunTimes = AppGroupManager.SunTimes(
+            date: "2026-03-20",
+            sunrise: "2026-03-20T06:42:00",
+            sunset: "2026-03-20T18:15:00",
+            timestamp: "2026-03-23T10:00:00Z"
+        )
+
+        manager.saveSunTimes(sunTimes)
+        let retrieved = manager.getSunTimes()
+
+        XCTAssertNotNil(retrieved)
+        XCTAssertEqual(retrieved?.date, "2026-03-20")
+    }
+
+    func testClearData() {
+        let location = AppGroupManager.UserLocation(
+            latitude: 0.0, longitude: 0.0, timestamp: "2026-03-23T10:00:00Z", isDefaultLocation: true
+        )
+        manager.saveLocation(location)
+        manager.clearAllData()
+
+        XCTAssertNil(manager.getLocation())
+    }
+}
diff --git a/Solverv/Utilities/AppGroupManager.swift b/Solverv/Utilities/AppGroupManager.swift
new file mode 100644
index 0000000..95ff2de
--- /dev/null
+++ b/Solverv/Utilities/AppGroupManager.swift
@@ -0,0 +1,67 @@
+import Foundation
+
+class AppGroupManager {
+    static let shared = AppGroupManager()
+    static let appGroupID = "group.com.ivarlovlie.solverv"
+
+    private lazy var userDefaults: UserDefaults? = {
+        UserDefaults(suiteName: Self.appGroupID)
+    }()
+
+    // MARK: - Location Storage
+
+    struct UserLocation: Codable {
+        let latitude: Double
+        let longitude: Double
+        let timestamp: String // ISO 8601
+        let isDefaultLocation: Bool
+    }
+
+    func saveLocation(_ location: UserLocation) {
+        guard let ud = userDefaults else { return }
+        if let encoded = try? JSONEncoder().encode(location) {
+            ud.set(encoded, forKey: "userLocation")
+        }
+    }
+
+    func getLocation() -> UserLocation? {
+        guard let ud = userDefaults,
+              let data = ud.data(forKey: "userLocation"),
+              let location = try? JSONDecoder().decode(UserLocation.self, from: data) else {
+            return nil
+        }
+        return location
+    }
+
+    // MARK: - Sunrise/Sunset Storage
+
+    struct SunTimes: Codable {
+        let date: String // ISO 8601 date only (YYYY-MM-DD)
+        let sunrise: String // ISO 8601 datetime
+        let sunset: String // ISO 8601 datetime
+        let timestamp: String // ISO 8601 when calculated
+    }
+
+    func saveSunTimes(_ sunTimes: SunTimes) {
+        guard let ud = userDefaults else { return }
+        if let encoded = try? JSONEncoder().encode(sunTimes) {
+            ud.set(encoded, forKey: "sunTimes")
+        }
+    }
+
+    func getSunTimes() -> SunTimes? {
+        guard let ud = userDefaults,
+              let data = ud.data(forKey: "sunTimes"),
+              let sunTimes = try? JSONDecoder().decode(SunTimes.self, from: data) else {
+            return nil
+        }
+        return sunTimes
+    }
+
+    // MARK: - Helpers
+
+    func clearAllData() {
+        userDefaults?.removeObject(forKey: "userLocation")
+        userDefaults?.removeObject(forKey: "sunTimes")
+    }
+}