website refactor

apps/website/lib/builders/view-models/LoginViewModelBuilder.ts

@@ -0,0 +1,39 @@
+/**
+ * Login ViewModel Builder
+ * 
+ * Transforms API DTOs into LoginViewModel for client-side state management.
+ * Deterministic, side-effect free, no business logic.
+ */
+
+import { LoginViewData } from '@/lib/builders/view-data/LoginViewDataBuilder';
+import { LoginViewModel, LoginFormState, LoginUIState } from '@/lib/view-models/auth/LoginViewModel';
+
+export class LoginViewModelBuilder {
+  static build(viewData: LoginViewData): LoginViewModel {
+    const formState: LoginFormState = {
+      fields: {
+        email: { value: '', error: undefined, touched: false, validating: false },
+        password: { value: '', error: undefined, touched: false, validating: false },
+        rememberMe: { value: false, error: undefined, touched: false, validating: false },
+      },
+      isValid: true,
+      isSubmitting: false,
+      submitError: undefined,
+      submitCount: 0,
+    };
+
+    const uiState: LoginUIState = {
+      showPassword: false,
+      showErrorDetails: false,
+    };
+
+    return new LoginViewModel(
+      viewData.returnTo,
+      viewData.hasInsufficientPermissions,
+      formState,
+      uiState,
+      false,
+      null
+    );
+  }
+}