@terabits/grapi/lib/hooks/compose.js

Grapi Schema Generator For GraphQL Server

"use strict";
exports.__esModule = true;
exports["default"] = (function (middleware) {
    if (!Array.isArray(middleware)) {
        throw new TypeError('Middleware stack must be an array!');
    }
    for (var _i = 0, middleware_1 = middleware; _i < middleware_1.length; _i++) {
        var fn = middleware_1[_i];
        if (typeof fn !== 'function') {
            throw new TypeError('Middleware must be composed of functions!');
        }
    }
    return function (context, next) {
        var index = -1;
        function dispatch(i) {
            if (i <= index) {
                return Promise.reject(new Error('next() called multiple times'));
            }
            index = i;
            var fn = middleware[i];
            if (i === middleware.length) {
                fn = next;
            }
            if (!fn) {
                return Promise.resolve();
            }
            try {
                return Promise.resolve(fn(context, dispatch.bind(null, i + 1)));
            }
            catch (err) {
                return Promise.reject(err);
            }
        }
        return dispatch(0);
    };
});