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74 lines
1.7 KiB
74 lines
1.7 KiB
'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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