chore: rename aelis to freya (#122)

apps/freya-backend/src/auth/session-middleware.ts

@@ -0,0 +1,109 @@
+import type { Context, MiddlewareHandler, Next } from "hono"
+
+import type { Auth } from "./index.ts"
+import type { AuthSession, AuthUser } from "./session.ts"
+
+export interface SessionVariables {
+	user: AuthUser | null
+	session: AuthSession | null
+}
+
+export type AuthSessionEnv = { Variables: SessionVariables }
+
+export type AuthSessionMiddleware = MiddlewareHandler<AuthSessionEnv>
+
+declare module "hono" {
+	interface ContextVariableMap extends SessionVariables {}
+}
+
+/**
+ * Creates a middleware that attaches session and user to the context.
+ * Does not reject unauthenticated requests - use createRequireSession for that.
+ */
+export function createSessionMiddleware(auth: Auth): AuthSessionMiddleware {
+	return async (c: Context, next: Next): Promise<void> => {
+		const session = await auth.api.getSession({ headers: c.req.raw.headers })
+
+		if (session) {
+			c.set("user", session.user)
+			c.set("session", session.session)
+		} else {
+			c.set("user", null)
+			c.set("session", null)
+		}
+
+		await next()
+	}
+}
+
+/**
+ * Creates a middleware that requires a valid session. Returns 401 if not authenticated.
+ */
+export function createRequireSession(auth: Auth): AuthSessionMiddleware {
+	return async (c: Context, next: Next): Promise<Response | void> => {
+		const session = await auth.api.getSession({ headers: c.req.raw.headers })
+
+		if (!session) {
+			return c.json({ error: "Unauthorized" }, 401)
+		}
+
+		c.set("user", session.user)
+		c.set("session", session.session)
+		await next()
+	}
+}
+
+/**
+ * Creates a function to get session from headers. Useful for WebSocket upgrade validation.
+ */
+export function createGetSessionFromHeaders(auth: Auth) {
+	return async (headers: Headers): Promise<{ user: AuthUser; session: AuthSession } | null> => {
+		const session = await auth.api.getSession({ headers })
+		return session
+	}
+}
+
+/**
+ * Dev/test middleware that injects a fake user and session.
+ * Pass userId to simulate an authenticated request, or omit to get 401.
+ */
+export function mockAuthSessionMiddleware(userId?: string): AuthSessionMiddleware {
+	return async (c: Context, next: Next): Promise<Response | void> => {
+		if (!userId) {
+			return c.json({ error: "Unauthorized" }, 401)
+		}
+
+		const now = new Date()
+		const expiresAt = new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000)
+
+		const user: AuthUser = {
+			id: "k7Gx2mPqRvNwYs9TdLfA4bHcJeUo1iZn",
+			name: "Dev User",
+			email: "dev@freya.local",
+			emailVerified: true,
+			image: null,
+			createdAt: now,
+			updatedAt: now,
+			role: "admin",
+			banned: false,
+			banReason: null,
+			banExpires: null,
+		}
+
+		const session: AuthSession = {
+			id: "Wt3FvBpXaQrMhD8sKjE6LcYn0gUz5iRo",
+			userId: "k7Gx2mPqRvNwYs9TdLfA4bHcJeUo1iZn",
+			token: "Vb9CxNfRm2KwQs7TjPeA5dLhYg0UoZi4",
+			expiresAt,
+			ipAddress: "127.0.0.1",
+			userAgent: "freya-dev",
+			createdAt: now,
+			updatedAt: now,
+		}
+
+		c.set("user", user)
+		c.set("session", session)
+
+		await next()
+	}
+}