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Getting Started

Retrieve a session​

import { getSession, getUserSession } from '@repo/auth/server'

// May return undefined if no session exists
const session = getSession()

// Throws 401 if no authenticated user -- use when you need a guaranteed user
const userSession = getUserSession()

Create a basic gate​

Gates are functions that receive a session and return true, false, or a GateResult.

import type { Gate } from '@repo/auth'
import { createGateResult } from '@repo/auth'

const isAdmin: Gate = (session) => {
  if (!session?.user?.id) {
    return createGateResult(false, 401)
  }
  return hasPermission(session.entity.permissions, '*', ['*'])
}

Protect a route​

Wrap validateAccessInSvelte per-app so you can customize redirect behavior:

import type { Gate } from '@repo/auth'
import { validateAccessInSvelte } from '@repo/auth/server'
import { getRequestEvent } from '$app/server'
import { redirect } from '@sveltejs/kit'

export async function validateSession(gates?: Gate[]) {
  await validateAccessInSvelte({
    gates,
    onUnauthenticated: () => {
      const request = getRequestEvent()
      const redirectTarget = encodeURIComponent(request.url.pathname + request.url.search)
      redirect(307, `/login?redirect=${redirectTarget}`)
    },
    onUnauthorized: () => {
      redirect(307, '/dashboard')
    },
  })
}

Then use it in any server context:

import { isAuthenticatedGate, permissionGate } from '@repo/auth'

await validateSession([isAuthenticatedGate, permissionGate('invoices', ['read'])])