feat(auth): add role-based access control for dashboard

Implement admin, moderator, and user roles with permissions for dashboard access, libraries, and extensions. Added database schema fields for user roles and bans, integrated Better Auth admin plugin, and created TRPC middleware for permission checks. Updated client-side auth to support role-based features.

apps/server/index.ts

@@ -1,3 +1,10 @@
+export {
+	accessControl,
+	adminRole,
+	moderatorRole,
+	statement,
+	userRole,
+} from "./src/lib/auth/permissions";
 export * as Models from "./src/models";
 export * from "./src/providers/metadata";
 export * from "./src/services/extensions/baseExtension";

apps/server/src/db/schema/auth.ts

@@ -17,6 +17,10 @@ export const user = sqliteTable("user", {
 		.notNull(),
 	username: text("username").unique(),
 	displayUsername: text("display_username"),
+	role: text("role"),
+	banned: integer("banned", { mode: "boolean" }).default(false),
+	banReason: text("ban_reason"),
+	banExpires: integer("ban_expires", { mode: "timestamp" }),
 });
 
 export const session = sqliteTable("session", {
@@ -34,6 +38,7 @@ export const session = sqliteTable("session", {
 	userId: text("user_id")
 		.notNull()
 		.references(() => user.id, { onDelete: "cascade" }),
+	impersonatedBy: text("impersonated_by"),
 });
 
 export const account = sqliteTable("account", {

apps/server/src/lib/auth.ts

@@ -1,8 +1,14 @@
 import { betterAuth } from "better-auth";
 import { drizzleAdapter } from "better-auth/adapters/drizzle";
-import { username } from "better-auth/plugins";
+import { admin, username } from "better-auth/plugins";
 import { database } from "../db";
 import * as schema from "../db/schema/auth";
+import {
+	accessControl,
+	adminRole,
+	moderatorRole,
+	userRole,
+} from "./auth/permissions";
 
 const auth = betterAuth({
 	database: drizzleAdapter(database, {
@@ -20,7 +26,18 @@ const auth = betterAuth({
 			httpOnly: true,
 		},
 	},
-	plugins: [username()],
+	plugins: [
+		username(),
+		admin({
+			ac: accessControl,
+			roles: {
+				adminRole,
+				moderatorRole,
+				userRole,
+			},
+			defaultRole: "user",
+		}),
+	],
 });
 
 export default auth;

apps/server/src/lib/auth/permissions.ts

@@ -0,0 +1,29 @@
+import { createAccessControl } from "better-auth/plugins/access";
+import { adminAc, defaultStatements } from "better-auth/plugins/admin/access";
+
+export const statement = {
+	...defaultStatements,
+	dashboard: ["access"],
+	libraries: ["create", "read", "update", "delete"],
+	extensions: ["create", "read", "update", "delete"],
+} as const;
+
+export const accessControl = createAccessControl(statement);
+
+export const adminRole = accessControl.newRole({
+	...adminAc.statements,
+	dashboard: ["access"],
+	libraries: ["create", "read", "update", "delete"],
+	extensions: ["create", "read", "update", "delete"],
+});
+
+export const moderatorRole = accessControl.newRole({
+	dashboard: ["access"],
+	libraries: ["read"],
+	extensions: ["read"],
+});
+
+export const userRole = accessControl.newRole({
+	libraries: ["read"],
+	extensions: ["read"],
+});

apps/server/src/trpc/middleware/dashboard.ts

@@ -0,0 +1,34 @@
+import { TRPCError } from "@trpc/server";
+import auth from "@/lib/auth";
+import { t } from "@/lib/trpc";
+
+export const dashboardMiddleware = t.middleware(async ({ ctx, next }) => {
+	const session = await auth.api.getSession({
+		headers: ctx.requestContext.req.raw.headers,
+	});
+
+	if (!session) {
+		throw new TRPCError({
+			code: "UNAUTHORIZED",
+			message: "Authentication required. Please log in to continue.",
+		});
+	}
+
+	const hasPermission = await auth.api.userHasPermission({
+		body: {
+			userId: session.user.id,
+			permissions: {
+				dashboard: ["access"],
+			},
+		},
+	});
+
+	if (!hasPermission) {
+		throw new TRPCError({
+			code: "FORBIDDEN",
+			message: "You do not have permission to access the dashboard.",
+		});
+	}
+
+	return next({ ctx: { ...ctx, userSession: session } });
+});

apps/web/src/components/UserMenu.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useNavigate } from "@tanstack/react-router";
+import { Link, useNavigate } from "@tanstack/react-router";
 import { LayoutDashboard, LogOutIcon } from "lucide-react";
 import React from "react";
 
@@ -77,15 +77,11 @@ export default function UserMenu() {
 				</DropdownMenuLabel>
 				<DropdownMenuSeparator />
 				<DropdownMenuGroup>
-					<DropdownMenuItem
-						onClick={() => {
-							navigate({
-								to: "/home/dashboard",
-							});
-						}}
-					>
-						<LayoutDashboard />
-						Dashboard
+					<DropdownMenuItem asChild>
+						<Link to="/dashboard" onClick={() => setOpen(false)}>
+							<LayoutDashboard />
+							Dashboard
+						</Link>
 					</DropdownMenuItem>
 				</DropdownMenuGroup>
 				<DropdownMenuSeparator />

apps/web/src/lib/auth-client.ts

@@ -1,7 +1,21 @@
-import { usernameClient } from "better-auth/client/plugins";
+import { adminRole, moderatorRole, statement, userRole } from "@nontara/server";
+import { adminClient, usernameClient } from "better-auth/client/plugins";
+import { createAccessControl } from "better-auth/plugins/access";
 import { createAuthClient } from "better-auth/react";
 
+const ac = createAccessControl(statement);
+
 export const authClient = createAuthClient({
 	baseURL: import.meta.env.VITE_SERVER_URL,
-	plugins: [usernameClient()],
+	plugins: [
+		usernameClient(),
+		adminClient({
+			ac,
+			roles: {
+				admin: adminRole,
+				moderator: moderatorRole,
+				user: userRole,
+			},
+		}),
+	],
 });

apps/web/src/routes/dashboard.tsx

@@ -31,6 +31,14 @@ import {
 	DropdownMenuSeparator,
 	DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
+import {
+	Empty,
+	EmptyContent,
+	EmptyDescription,
+	EmptyHeader,
+	EmptyMedia,
+	EmptyTitle,
+} from "@/components/ui/empty";
 import {
 	Sidebar,
 	SidebarContent,
@@ -59,6 +67,16 @@ export const Route = createFileRoute("/dashboard")({
 				to: "/login",
 			});
 		}
+
+		const { data: hasPermission } = await authClient.admin.hasPermission({
+			permissions: {
+				dashboard: ["access"],
+			},
+		});
+
+		return {
+			hasAccess: hasPermission ?? false,
+		};
 	},
 });
 
@@ -334,6 +352,35 @@ export function DashboardHeader({ children }: PropsWithChildren) {
 }
 
 function RouteComponent() {
+	const { hasAccess } = Route.useRouteContext();
+
+	if (!hasAccess) {
+		return (
+			<div className="flex min-h-screen items-center justify-center bg-background p-4">
+				<Empty>
+					<EmptyHeader>
+						<EmptyMedia variant="icon">
+							<Settings />
+						</EmptyMedia>
+						<EmptyTitle>Access Denied</EmptyTitle>
+						<EmptyDescription>
+							You do not have permission to access the dashboard. Please contact
+							an administrator if you believe this is an error.
+						</EmptyDescription>
+					</EmptyHeader>
+					<EmptyContent>
+						<Button asChild>
+							<Link to="/home">
+								<ArrowLeft className="mr-2 size-4" />
+								Back to Home
+							</Link>
+						</Button>
+					</EmptyContent>
+				</Empty>
+			</div>
+		);
+	}
+
 	return (
 		<SidebarProvider>
 			<Sidebar>

package.json

@@ -1,12 +1,11 @@
 {
 	"name": "nontara",
+	"devDependencies": {
+		"turbo": "^2.5.4",
+		"@biomejs/biome": "^2.2.0"
+	},
+	"packageManager": "bun@1.2.22",
 	"private": true,
-	"type": "module",
-	"workspaces": [
-		"apps/*",
-		"packages/*",
-		"extensions/*"
-	],
 	"scripts": {
 		"check": "biome check --write .",
 		"dev": "turbo dev",
@@ -18,12 +17,13 @@
 		"db:push": "turbo -F @nontara/server db:push",
 		"db:studio": "turbo -F @nontara/server db:studio",
 		"db:generate": "turbo -F @nontara/server db:generate",
-		"db:migrate": "turbo -F @nontara/server db:migrate"
+		"db:migrate": "turbo -F @nontara/server db:migrate",
+		"auth:generate": "turbo -F @nontara/server auth:generate"
 	},
-	"dependencies": {},
-	"devDependencies": {
-		"turbo": "^2.5.4",
-		"@biomejs/biome": "^2.2.0"
-	},
-	"packageManager": "bun@1.2.22"
-}
+	"type": "module",
+	"workspaces": [
+		"apps/*",
+		"packages/*",
+		"extensions/*"
+	]
+}

turbo.json

@@ -3,15 +3,26 @@
 	"ui": "tui",
 	"tasks": {
 		"build": {
-			"dependsOn": ["^build"],
-			"inputs": ["$TURBO_DEFAULT$", ".env*"],
-			"outputs": ["dist/**"]
+			"dependsOn": [
+				"^build"
+			],
+			"inputs": [
+				"$TURBO_DEFAULT$",
+				".env*"
+			],
+			"outputs": [
+				"dist/**"
+			]
 		},
 		"lint": {
-			"dependsOn": ["^lint"]
+			"dependsOn": [
+				"^lint"
+			]
 		},
 		"check-types": {
-			"dependsOn": ["^check-types"]
+			"dependsOn": [
+				"^check-types"
+			]
 		},
 		"dev": {
 			"cache": false,
@@ -32,6 +43,10 @@
 		"db:generate": {
 			"cache": false,
 			"persistent": true
+		},
+		"auth:generate": {
+			"cache": false,
+			"persistent": true
 		}
 	}
-}
+}