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import utils from './utils';

import Constants from './constants';

var getUtmData = function getUtmData(rawCookie, query) {

// Translate the utmz cookie format into url query string format.

var cookie = rawCookie ? '?' + rawCookie.split('.').slice(-1)[0].replace(/\|/g, '&') : '';

var fetchParam = function fetchParam(queryName, query, cookieName, cookie) {

return utils.getQueryParam(queryName, query) || utils.getQueryParam(cookieName, cookie);

};

var utmSource = fetchParam(Constants.UTM_SOURCE, query, 'utmcsr', cookie);

var utmMedium = fetchParam(Constants.UTM_MEDIUM, query, 'utmcmd', cookie);

var utmCampaign = fetchParam(Constants.UTM_CAMPAIGN, query, 'utmccn', cookie);

var utmTerm = fetchParam(Constants.UTM_TERM, query, 'utmctr', cookie);

var utmContent = fetchParam(Constants.UTM_CONTENT, query, 'utmcct', cookie);

var utmData = {};

var addIfNotNull = function addIfNotNull(key, value) {

if (!utils.isEmptyString(value)) {

utmData[key] = value;

}

};

addIfNotNull(Constants.UTM_SOURCE, utmSource);

addIfNotNull(Constants.UTM_MEDIUM, utmMedium);

addIfNotNull(Constants.UTM_CAMPAIGN, utmCampaign);

addIfNotNull(Constants.UTM_TERM, utmTerm);

addIfNotNull(Constants.UTM_CONTENT, utmContent);

return utmData;

};

export default getUtmData;