Availability based on permissions

frontend/lib/getMe.ts

@@ -0,0 +1,22 @@
+import { cache } from "react";
+import { API_URL } from "./constants";
+import { ApiResponse } from "@/types/types";
+import IUser from "@/interfaces/IUser";
+import { cookies } from "next/headers";
+
+const getMe = cache(
+	async (sessionCookie?: string): Promise<ApiResponse<IUser> | null> => {
+		if (!sessionCookie) {
+			const store = await cookies();
+			const token = store.get("auth_token")?.value;
+			if (!token) return null;
+			sessionCookie = token;
+		}
+		const res = await fetch(`${API_URL}/users/me`, {
+			headers: { Authorization: `Bearer ${sessionCookie}` },
+		});
+		return await res.json();
+	},
+);
+
+export default getMe;

frontend/lib/hasPermissions.ts

@@ -0,0 +1,25 @@
+import { Role } from "@/types/types";
+
+export default function hasPermissions(
+	roles: Role[],
+	permissions: { [key: string]: string[] },
+) {
+	const permissionsSet: Map<string, null> = new Map();
+	for (const role of roles) {
+		if (!role.permissions) continue;
+		for (const perm of role?.permissions) {
+			const key = perm.resource + ":" + perm.action;
+			permissionsSet.set(key, null);
+		}
+	}
+
+	for (const [perm, actions] of Object.entries(permissions)) {
+		for (const action of actions) {
+			if (!permissionsSet.has(perm + ":" + action)) {
+				return false;
+			}
+		}
+	}
+
+	return true;
+}