wip 21

frontend/src/auth/authHelpers.ts

@@ -0,0 +1,98 @@
+export interface AuthUser {
+  username: string;
+  is_admin: boolean;
+}
+
+export interface AuthState {
+  isAuthenticated: boolean;
+  user: AuthUser | null;
+  isCheckingAuth: boolean;
+}
+
+interface ResponseLike {
+  status?: number;
+  data?: unknown;
+}
+
+export function getUnauthenticatedAuthState(): AuthState {
+  return {
+    isAuthenticated: false,
+    user: null,
+    isCheckingAuth: false,
+  };
+}
+
+export function getCheckingAuthState(previousState?: AuthState): AuthState {
+  return {
+    isAuthenticated: previousState?.isAuthenticated ?? false,
+    user: previousState?.user ?? null,
+    isCheckingAuth: true,
+  };
+}
+
+export function getAuthenticatedAuthState(user: AuthUser): AuthState {
+  return {
+    isAuthenticated: true,
+    user,
+    isCheckingAuth: false,
+  };
+}
+
+export function normalizeAuthenticatedUser(value: unknown): AuthUser | null {
+  if (!value || typeof value !== 'object') {
+    return null;
+  }
+
+  if (!('username' in value) || typeof value.username !== 'string') {
+    return null;
+  }
+
+  if (!('is_admin' in value) || typeof value.is_admin !== 'boolean') {
+    return null;
+  }
+
+  return {
+    username: value.username,
+    is_admin: value.is_admin,
+  };
+}
+
+export function resolveAuthStateFromMe(params: {
+  meData?: ResponseLike;
+  meError?: unknown;
+  meLoading: boolean;
+  previousState: AuthState;
+}): AuthState {
+  const { meData, meError, meLoading, previousState } = params;
+
+  if (meLoading) {
+    return getCheckingAuthState(previousState);
+  }
+
+  if (meData?.status === 200) {
+    const user = normalizeAuthenticatedUser(meData.data);
+    if (user) {
+      return getAuthenticatedAuthState(user);
+    }
+  }
+
+  if (meError || meData?.status === 401) {
+    return getUnauthenticatedAuthState();
+  }
+
+  return {
+    ...previousState,
+    isCheckingAuth: false,
+  };
+}
+
+export function validateAuthMutationResponse(
+  response: ResponseLike,
+  expectedStatus: number
+): AuthUser | null {
+  if (response.status !== expectedStatus) {
+    return null;
+  }
+
+  return normalizeAuthenticatedUser(response.data);
+}