hurt/lib/handler.js

HTTP and SPA routing using RFC 6570 URI templates

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = handler;
/**
 * Return a function to process the given list of callbacks,
 * keeping the call stack flat in case `next` is called synchronously.
 *
 * @param {Array<Function>} stack
 * @param {*} [context]
 * @return {Function}
 */
function handler(stack, context) {
  return function () {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    var self = context || this;
    var next = args.pop();

    var index = 0;
    var sync = true;

    args.push(iter);
    iter();

    function iter(err) {
      if (err) {
        sync = true;
      }

      while (sync) {
        sync = false;
        if (err || index >= stack.length) {
          next(err);
        } else {
          try {
            stack[index++].apply(self, args);
          } catch (e) {
            sync = true;
            err = e;
          }
        }
      }

      sync = true;
    }
  };
}
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