http.js

/**
 *
 * @description parses http headers string
 * 	and returns them as Array of { key: value }
 *
 * @headers {string}
 * var headers = `Pragma: no-cache
 * Cache-Control: no-cache
 * Content-Type: application/json; charset=UTF-8
 * Accept-Encoding: gzip, deflate, br
 * Accept-Language: ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7`
 *
 * @returns {array} < [headerName, headerValue] >
 */

export const parseHttpHeaders = headers => (
	String(headers)
		.split(/[\r\n]+/)
		.filter(Boolean)
		.map(header => header.split(/:\s+/))
);

export const getCookie = cookieName => (
	document.cookie.split(';')
		.map(s => s.trim().split('='))
		.find(v => v[0] === cookieName) || []
)[1];

export const tupleToObject = tuple => ({ [String(tuple[0])]: tuple[1] });

export const collectionToMap = collection => collection.reduce((acc, v) => ({...acc, ...v}), {});