Fullcalendar event url - add class if url contains - fullcalendar

Question

Some of my Fullcalendar events have links. The links point to either public webpages, pdf documents or webpages which are restricted access.
I would like to add a class to format the links to add an icon, based on url string.
If the url contains:
"pdf" addclass "fc-pdf"
"restricted" addclass "fc-lock"
I assume it should be with and eventRender... but I'm having trouble find the right syntax. Can someone help me with this?
http://jsfiddle.net/lbriquet/oez9Ltym/
$('#calendar').fullCalendar({
header: {
left: 'prev,next today',
center: 'title',
right: 'listDay,listWeek,month'
},
views: {
listDay: {
buttonText: 'list day'
},
listWeek: {
buttonText: 'list week'
}
},
defaultView: 'listDay',
defaultDate: '2016-09-12',
navLinks: true, // can click day/week names to navigate views
events: [{
title: 'Conference (website)',
start: '2016-09-11',
end: '2016-09-13',
url: "https://www.ted.com/talks"
}, {
title: 'Meeting (download document)',
start: '2016-09-12T10:30:00',
end: '2016-09-12T12:30:00',
url: "http://storage.ted.com/tedx/manuals/tedx_speaker_guide.pdf"
}, {
title: 'Lunch',
start: '2016-09-12T12:00:00'
}, {
title: 'Meeting (members only)',
start: '2016-09-12T14:30:00',
url: "http://www.dictionary.com/browse/restricted"
}, {
title: 'Happy Hour',
start: '2016-09-12T17:30:00'
}, {
title: 'Dinner',
start: '2016-09-12T20:00:00'
}],
eventRender: function eventRender(event, element, view) {
}
});

Answer 1

The way I got this to work was by adding a type to the events simply because I think it would be easier than dealing with regex that might not always work. So events don't need a type but they can have a type pdf, restricted or whatever else you need. In eventRender I added the following:
eventRender: function eventRender(event, element, view) {
if(typeof event.type !== 'undefined') {
if(event.type === 'pdf') {
element.addClass('fc-pdf');
} else if(event.type === 'restricted') {
element.addClass('fc-lock');
}
}
}
A check to see if the type is provided or not and then if statements for adding the class based on the type. I also had to make a small change to the css selector, changing a.fc-lock to .fc-lock a to allow it to display properly. Here is the JS Fiddle showing this.