enforce membership feature access in api and surface plans in admin

apps/mobile/src/api/membership.ts

@@ -0,0 +1,87 @@
+import { apiClient, withAuth } from "./client";
+import { API_ENDPOINTS } from "../config/api";
+
+export type MembershipType = "basic" | "premium" | "vip";
+
+export interface MembershipFeatures {
+  recommendationsPerMonth: number;
+  hydrationTracking: boolean;
+  nutritionTracking: boolean;
+  advancedStatistics: boolean;
+}
+
+const MEMBERSHIP_FEATURES: Record<MembershipType, MembershipFeatures> = {
+  basic: {
+    recommendationsPerMonth: 1,
+    hydrationTracking: false,
+    nutritionTracking: false,
+    advancedStatistics: false,
+  },
+  premium: {
+    recommendationsPerMonth: -1,
+    hydrationTracking: true,
+    nutritionTracking: true,
+    advancedStatistics: true,
+  },
+  vip: {
+    recommendationsPerMonth: -1,
+    hydrationTracking: true,
+    nutritionTracking: true,
+    advancedStatistics: true,
+  },
+};
+
+interface UsersListResponse {
+  success?: boolean;
+  data?: {
+    users?: Array<{
+      id: string;
+      role: string;
+      client?: {
+        membershipType?: MembershipType;
+      } | null;
+    }>;
+  };
+  users?: Array<{
+    id: string;
+    role: string;
+    client?: {
+      membershipType?: MembershipType;
+    } | null;
+  }>;
+}
+
+function isMembershipType(value: unknown): value is MembershipType {
+  return value === "basic" || value === "premium" || value === "vip";
+}
+
+export async function getCurrentMembershipType(
+  userId: string,
+  token: string | null,
+): Promise<MembershipType> {
+  if (!token || !userId) {
+    return "basic";
+  }
+
+  const response = await apiClient.get<UsersListResponse>(
+    API_ENDPOINTS.USERS.LIST,
+    withAuth(token),
+  );
+
+  const payload = response.data;
+  const users = payload.data?.users ?? payload.users ?? [];
+  const currentUser = users.find((user) => user.id === userId);
+
+  if (!currentUser || currentUser.role !== "client") {
+    return "vip";
+  }
+
+  const membershipType = currentUser.client?.membershipType;
+  return isMembershipType(membershipType) ? membershipType : "basic";
+}
+
+export function getMembershipFeatures(
+  membershipType: MembershipType,
+): MembershipFeatures {
+  return MEMBERSHIP_FEATURES[membershipType];
+}