/**
 * Job of this function is to check all valid urls and determine
 * if we need to add `data-izimodal-open` to them
 */
(function($, drupalSettings, window){

    var modalId = drupalSettings.meltModal.modalId;
    var continueId = drupalSettings.meltModal.continueId;

    // Set defaults if no id exists
    modalId = modalId || '#external-link-modal';
    continueId = continueId || '.external-link-modal--continue';

    // Loop through each link and add a `data-external` attribute
    // so we can add click event listeners after we loop
    $('a[href^="http"]').each(function(){
      var isExternalLink = window.location.hostname !== this.hostname;

      if(isExternalLink && !inWhitelist(this.href)) {
        $(this).attr('data-izimodal-open', modalId);
        $(this).attr('data-externallink-continue', continueId);
      }
    });

    /*********************************************************************************
     * Function Declarations
     **********************************************************************************/

    /**
     * Checks to see if url given is in the melt Modal's whitelist.
     *
     * @param {string} url
     *
     * @returns {boolean} true/false
     */
    function inWhitelist(url){
        var whiteList = drupalSettings.meltModal.whitelist;
        whiteList = whiteList ? whiteList.split('\n') : [];
        return whiteList.some(function(item){
            return url.indexOf(item.trim()) !== -1;
        });
    }

})(jQuery, drupalSettings, window)