75 lines
1.7 KiB
JavaScript
75 lines
1.7 KiB
JavaScript
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'use strict';
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var core = require('../'),
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isArray = require('lodash/isArray'),
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isFunction = require('lodash/isFunction'),
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isObjectLike = require('lodash/isObjectLike');
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module.exports = function (options) {
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var errorText = 'Please verify options'; // For better minification because this string is repeating
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if (!isObjectLike(options)) {
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throw new TypeError(errorText);
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}
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if (!isFunction(options.request)) {
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throw new TypeError(errorText + '.request');
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}
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if (!isArray(options.expose) || options.expose.length === 0) {
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throw new TypeError(errorText + '.expose');
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}
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var plumbing = core({
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PromiseImpl: options.PromiseImpl,
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constructorMixin: options.constructorMixin
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});
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// Intercepting Request's init method
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var originalInit = options.request.Request.prototype.init;
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options.request.Request.prototype.init = function RP$initInterceptor(requestOptions) {
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// Init may be called again - currently in case of redirects
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if (isObjectLike(requestOptions) && !this._callback && !this._rp_promise) {
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plumbing.init.call(this, requestOptions);
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}
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return originalInit.apply(this, arguments);
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};
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// Exposing the Promise capabilities
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var thenExposed = false;
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for ( var i = 0; i < options.expose.length; i+=1 ) {
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var method = options.expose[i];
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plumbing[ method === 'promise' ? 'exposePromise' : 'exposePromiseMethod' ](
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options.request.Request.prototype,
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null,
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'_rp_promise',
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method
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);
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if (method === 'then') {
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thenExposed = true;
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}
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}
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if (!thenExposed) {
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throw new Error('Please expose "then"');
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}
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};
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