@better-auth-ui/core/src/plugins/billing/billing-plugin.ts

Authentication components and data utilities for [Better Auth](https://better-auth.com), available for React and Solid.

import { createAuthPlugin } from "../../lib/create-auth-plugin"
import type {} from "../../lib/view-paths"
import type { BillingAdapter } from "./billing-adapter"
import {
  type BillingLocalization,
  billingLocalization
} from "./billing-localization"

declare module "../../lib/view-paths" {
  interface SettingsViewPaths {
    /** @default "billing" */
    billing?: string
  }
}

export type BillingPluginOptions = {
  adapter: BillingAdapter
  localization?: Partial<BillingLocalization>
  /** Add billing to personal settings. @default true */
  user?: boolean
  /** Add billing to organization settings. @default false */
  organization?: boolean
  /** @default "billing" */
  path?: string
}

export const billingPlugin = createAuthPlugin(
  "billing",
  (options: BillingPluginOptions) => {
    const user = options.user ?? true
    const organization = options.organization ?? false

    if (user && options.adapter.scopes?.user === false) {
      throw new Error(`${options.adapter.id} does not support user billing.`)
    }
    if (organization && options.adapter.scopes?.organization === false) {
      throw new Error(
        `${options.adapter.id} does not support explicit organization billing.`
      )
    }

    return {
      adapter: options.adapter,
      localization: { ...billingLocalization, ...options.localization },
      user,
      organization,
      viewPaths: {
        settings: { billing: options.path ?? "billing" }
      }
    }
  }
)