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					75 lines
				
				1.7 KiB
			
		
		
			
		
	
	
					75 lines
				
				1.7 KiB
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											4 years ago
										 
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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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