تعدد العملاء

const BASE_DOMAIN = 'example.com'
const RESERVED = ['www', 'demo']

export const getTenantId = (hostname) => {
  if (!hostname || hostname === 'localhost') return null
  if (isIpAddress(hostname)) return null
  if (isTunnelHost(hostname) || isPlatformDefaultHost(hostname)) return null

  const suffix = '.' + BASE_DOMAIN
  if (!hostname.endsWith(suffix)) return null

  const label = hostname.slice(0, -suffix.length)
  if (label.includes('.') || RESERVED.includes(label)) return null

  return label
}

// composables/useTenantId.js
export const useTenantId = () => getTenantId(useRequestURL().hostname)

// plugins/api.js
export default defineNuxtPlugin(() => {
  const tenantId = useTenantId()

  const api = $fetch.create({
    baseURL: '/api',
    onRequest({ options }) {
      if (tenantId) options.headers.set('tenantId', tenantId)
    }
  })

  return { provide: { api } }
})