function SalesChat()

in css/jetbrains-bundle/sales-chat.js [232:333]
53 lines of code
11 McCabe index (conditional complexity)

	function SalesChat(config) {
	  var chat = this;

	  // Configure
	  /**
	   * @type {SalesChatConfig}
	   */
	  var cfg = mergeConfig(defaultConfig, config || {});
	  this.config = cfg;

	  // Check is chat should be shown on current URL path
	  var currentURLPath = window.location.pathname;
	  var isShouldBeShown = true;

	  if (!cfg.urls || cfg.urls.length > 0) {
	    isShouldBeShown = cfg.urls.filter(function (regexp) {
	      return regexp.test(currentURLPath)
	    }).length > 0;

	    if (!isShouldBeShown) {
	      console.log('Chat#urls does not match current location');
	      return this;
	    }
	  }

	  this._emitter = Emitter();

	  Promise.resolve()
	    .then(function () {
	      // If country code not provided detect it via GeoIP service
	      if (!cfg.countryCode) {
	        return geo.getCountryCode();
	      } else {
	        return cfg.countryCode;
	      }
	    })

	    .then(function (countryCode) {
	      var department = chat.getDepartmentByCountryCode(countryCode);
	      chat.department = department;
	      return department;
	    })

	    // Load Zopim chat JS API
	    .then(function (department) {
	      return utils.loadZopimChatJSAPI(department.instanceDomain);
	    })

	    // Fire onReady & onConnect events
	    .then(function () {
	      $zopim(function () {
	        chat._emitter.emit(SalesChat.EVENTS.READY);

	        $zopim.livechat.setOnConnected(function () {
	          chat._emitter.emit(SalesChat.EVENTS.CONNECTED);
	        });
	      });
	    });

	  chat.onReady(function () {
	    var currentDepartment = chat.department;

	    // Pre-select the department based on the country
	    chat.setDepartment(currentDepartment.name);

	    if (cfg.lang) {
	      chat.setLanguage(cfg.lang);
	    }
	    else if (cfg.useDepartmentLang) {
	      chat.setLanguage(currentDepartment.lang);
	    }

	    chat.customizeTheme();
	  });

	  chat.onConnect(function () {
	    var currentDepartment = chat.department;

	    // Leave only current department
	    $zopim.livechat.departments.filter(currentDepartment.name);

	    var currentDepartmentId;
	    for (var deptId in departmentsList) {
	      if (departmentsList[deptId] === currentDepartment) {
	        currentDepartmentId = deptId;
	        break;
	      }
	    }

	    var status = chat.getDepartmentStatus(currentDepartment.name);
	    status = status ? status : '';

	    // lang, department id and status, e.g. en_international_offline
	    var tag = [
	      currentDepartment.lang,
	      currentDepartmentId,
	      status
	    ].join('_');

	    chat.addTags([tag]);
	  });
	}