refactor: split License out of MainViewModel — Commit 2/12 (tag refactor-commit-2)

Pure member movement into MainViewModel.License.cs (zero behavior change): Polar license state (LicenseKey/LicenseMessage/IsLicenseValidating/ IsLicenseEntryOpen/IsHubVisible/IsPremium + OfflineGracePeriod), ValidateLicenseAtStartupAsync, ActivateLicenseAsync. docs in same commit: ViewModels/index.md split table (License ✔).
2026-08-30 07:15:26 -07:00
parent 5eecf4536f
commit 9baae33916
3 changed files with 167 additions and 157 deletions
@@ -0,0 +1,162 @@
+using ytLive.Helpers;
+using ytLive.Services;
+
+namespace ytLive.ViewModels;
+
+public partial class MainViewModel
+{
+    // TASK 10 — Polar license validation
+    private string _licenseKey = string.Empty;
+    private string _licenseMessage = string.Empty;
+    private bool _isLicenseValidating;
+    private bool _isLicenseEntryOpen;
+    private static readonly TimeSpan OfflineGracePeriod = TimeSpan.FromDays(14);
+
+    /// <summary>True when the user holds a valid LlamaCasty license (Polar). When
+    /// false, the branding flash runs on every live stream.</summary>
+    private bool _isPremium;
+    public bool IsPremium
+    {
+        get => _isPremium;
+        private set
+        {
+            if (!SetProperty(ref _isPremium, value)) return;
+            // Flip the branding flash when premium state changes.
+            BrandFlashEnabled = !value;
+        }
+    }
+
+    // TASK 10 — license key entry
+    public string LicenseKey
+    {
+        get => _licenseKey;
+        set => SetProperty(ref _licenseKey, value);
+    }
+
+    public string LicenseMessage
+    {
+        get => _licenseMessage;
+        private set => SetProperty(ref _licenseMessage, value);
+    }
+
+    public bool IsLicenseValidating
+    {
+        get => _isLicenseValidating;
+        private set => SetProperty(ref _isLicenseValidating, value);
+    }
+
+    public bool IsLicenseEntryOpen
+    {
+        get => _isLicenseEntryOpen;
+        set
+        {
+            if (SetProperty(ref _isLicenseEntryOpen, value))
+                OnPropertyChanged(nameof(IsHubVisible));
+        }
+    }
+
+    /// <summary>The About hub is visible only when neither the licenses panel
+    /// nor the license entry panel is open.</summary>
+    public bool IsHubVisible => !IsLicensesOpen && !IsLicenseEntryOpen;
+
+    // ─── TASK 10 — Polar license validation ───
+
+    /// <summary>At startup, load the cached license state and re-validate online
+    /// if a key exists. If offline and within the 14-day grace period, the cached
+    /// premium state is trusted. If the grace period is exceeded, premium lapses.</summary>
+    private async Task ValidateLicenseAtStartupAsync()
+    {
+        var savedKey = _layoutStore.LoadLicenseKey();
+        if (string.IsNullOrWhiteSpace(savedKey))
+        {
+            IsPremium = false;
+            return;
+        }
+
+        LicenseKey = savedKey;
+        var validatedAt = _layoutStore.LoadLicenseValidatedAt();
+        var cachedPremium = _layoutStore.LoadIsPremium();
+
+        // If the last validation was within the grace period, trust the cache
+        // while we attempt an online re-validation in the background.
+        if (validatedAt.HasValue && DateTime.UtcNow - validatedAt.Value < OfflineGracePeriod)
+        {
+            IsPremium = cachedPremium;
+        }
+
+        // Try an online check — if it succeeds, it overrides the cache.
+        try
+        {
+            var service = new PolarLicenseService();
+            var result = await service.ValidateAsync(savedKey);
+            if (result.IsValid)
+            {
+                IsPremium = true;
+                _layoutStore.SaveIsPremium(true);
+                _layoutStore.SaveLicenseValidatedAt(DateTime.UtcNow);
+            }
+            else
+            {
+                // Key revoked or expired — clear premium.
+                IsPremium = false;
+                _layoutStore.SaveIsPremium(false);
+                _layoutStore.SaveLicenseValidatedAt(DateTime.UtcNow);
+                AppLog.Write($"License validation failed: {result.Error}");
+                _notifications.Warning("Premium is no longer active",
+                    $"{result.Error} — watermark branding returns until the license is renewed.");
+            }
+        }
+        catch (Exception ex)
+        {
+            // Offline or network error — keep the cached state, log it.
+            AppLog.Write($"License re-validation skipped (offline?): {ex.Message}");
+            if (!validatedAt.HasValue || DateTime.UtcNow - validatedAt.Value >= OfflineGracePeriod)
+            {
+                IsPremium = false;
+                _layoutStore.SaveIsPremium(false);
+            }
+        }
+    }
+
+    /// <summary>Called from the Activate button in the About overlay. Validates
+    /// the entered key, persists it, and flips premium state.</summary>
+    private async Task ActivateLicenseAsync()
+    {
+        if (string.IsNullOrWhiteSpace(LicenseKey)) return;
+
+        IsLicenseValidating = true;
+        LicenseMessage = "Validating\u2026";
+
+        try
+        {
+            var service = new PolarLicenseService();
+            var result = await service.ValidateAsync(LicenseKey);
+            if (result.IsValid)
+            {
+                IsPremium = true;
+                _layoutStore.SaveLicenseKey(LicenseKey.Trim());
+                _layoutStore.SaveIsPremium(true);
+                _layoutStore.SaveLicenseValidatedAt(DateTime.UtcNow);
+                LicenseMessage = "Premium activated! The watermark has been removed.";
+                AppLog.Write("License activated successfully");
+            }
+            else
+            {
+                IsPremium = false;
+                _layoutStore.SaveLicenseKey(null);
+                _layoutStore.SaveIsPremium(false);
+                LicenseMessage = result.Error ?? "Invalid license key.";
+                AppLog.Write($"License activation failed: {result.Error}");
+            }
+        }
+        catch (Exception ex)
+        {
+            LicenseMessage = $"Activation error: {ex.Message}";
+            AppLog.Write($"License activation error: {ex}");
+        }
+        finally
+        {
+            IsLicenseValidating = false;
+        }
+    }
+}