GetVariableCustomField.js

/**
 * The following script allows custom field to be used as part of get variable filtering
 *
 * Create a custom field called 'id', set it to visible in info-window, and ensure your marker has the relevant field filled with a number 
 *
 * Once done, add thos script and append your variable as ?custom_id=1
*/

jQuery(function($){
	$(document.body).on('markersplaced.wpgmza', function(){
		var custom_id = WPGMZA.getQueryParamValue("custom_id");
		if(custom_id){
			var temp_markers = WPGMZA.maps[0].markers;

			var marker_found = false;
			for(var i in temp_markers){
				var tmp = temp_markers[i];
				if(tmp.custom_field_data.length > 0){
					var fields = tmp.custom_field_data;
					for(var fi in fields){
						var field = fields[fi];
						if(marker_found === false){
							if(field.name === "id" && parseInt(custom_id) === parseInt(field.value)){
								marker_found = tmp;
							}
						}
					}
				} else { 
					console.log("WPMGZA Custom Field: No data found, remember to mark the field as visible in info-window for data to be available");
				}
			}

			if(marker_found !== false){
				marker_found.openInfoWindow();
			} else {
				console.log("WPGMZA Custom Field: We could not find a marker with custom id '" + custom_id + "' - Or Custom field is not defined as 'id' and visible in info-window");
			}
		}
	});
});