astro/dist/core/middleware/callMiddleware.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { AstroError, AstroErrorData } from "../errors/index.js";
async function callMiddleware(onRequest, apiContext, responseFunction) {
  let nextCalled = false;
  let responseFunctionPromise = void 0;
  const next = async (payload) => {
    nextCalled = true;
    responseFunctionPromise = responseFunction(apiContext, payload);
    return responseFunctionPromise;
  };
  let middlewarePromise = onRequest(apiContext, next);
  return await Promise.resolve(middlewarePromise).then(async (value) => {
    if (nextCalled) {
      if (typeof value !== "undefined") {
        if (value instanceof Response === false) {
          throw new AstroError(AstroErrorData.MiddlewareNotAResponse);
        }
        return value;
      } else {
        if (responseFunctionPromise) {
          return responseFunctionPromise;
        } else {
          throw new AstroError(AstroErrorData.MiddlewareNotAResponse);
        }
      }
    } else if (typeof value === "undefined") {
      throw new AstroError(AstroErrorData.MiddlewareNoDataOrNextCalled);
    } else if (value instanceof Response === false) {
      throw new AstroError(AstroErrorData.MiddlewareNotAResponse);
    } else {
      return value;
    }
  });
}
export {
  callMiddleware
};