Add swell provider folder

framework/swell/api/utils/create-api-handler.ts

@@ -0,0 +1,58 @@
+import type { NextApiHandler, NextApiRequest, NextApiResponse } from 'next'
+import { ShopifyConfig, getConfig } from '..'
+
+export type ShopifyApiHandler<
+  T = any,
+  H extends ShopifyHandlers = {},
+  Options extends {} = {}
+> = (
+  req: NextApiRequest,
+  res: NextApiResponse<ShopifyApiResponse<T>>,
+  config: ShopifyConfig,
+  handlers: H,
+  // Custom configs that may be used by a particular handler
+  options: Options
+) => void | Promise<void>
+
+export type ShopifyHandler<T = any, Body = null> = (options: {
+  req: NextApiRequest
+  res: NextApiResponse<ShopifyApiResponse<T>>
+  config: ShopifyConfig
+  body: Body
+}) => void | Promise<void>
+
+export type ShopifyHandlers<T = any> = {
+  [k: string]: ShopifyHandler<T, any>
+}
+
+export type ShopifyApiResponse<T> = {
+  data: T | null
+  errors?: { message: string; code?: string }[]
+}
+
+export default function createApiHandler<
+  T = any,
+  H extends ShopifyHandlers = {},
+  Options extends {} = {}
+>(
+  handler: ShopifyApiHandler<T, H, Options>,
+  handlers: H,
+  defaultOptions: Options
+) {
+  return function getApiHandler({
+    config,
+    operations,
+    options,
+  }: {
+    config?: ShopifyConfig
+    operations?: Partial<H>
+    options?: Options extends {} ? Partial<Options> : never
+  } = {}): NextApiHandler {
+    const ops = { ...operations, ...handlers }
+    const opts = { ...defaultOptions, ...options }
+
+    return function apiHandler(req, res) {
+      return handler(req, res, getConfig(config), ops, opts)
+    }
+  }
+}