Check Disqus for identifier conflicts before loading

gistfile1.js

<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript">
var disqus_shortname = 'YOUR_DISQUS_SHORTNAME'; // required: replace example with your forum shortname
var disqus_identifier = 'THE_DISQUS_IDENTIFIER';
var disqus_url = 'THE_PAGE_URL';
var disqus_public_key = 'YOUR_API_PUBLIC_KEY'; // Get one at http://disqus.com/api/applications/

$(document).ready(function () {

  var req = $.ajax({
		type: 'GET',
		url: 'https://disqus.com/api/3.0/threads/details.jsonp',
		data: { api_key: disqus_public_key, forum : disqus_shortname, thread : 'link:' + disqus_url },
		cache: false,
		dataType: 'jsonp',
		timeout : 2500,
	});
	
	req.success(function(result) {
	
		// Check the URL and note whether it has changed
		if (result.response.link != disqus_url) {
		
			console.log('Warning: thread link doesn\'t match declared URL.');
		
		}
		
		var existingIdentifiers = result.response.identifiers;
	
		// Check if the identifier is already attached to the thread and that the array isn't empty
		if (jQuery.inArray(disqus_identifier, existingIdentifiers) == -1 && existingIdentifiers.length > 0) {
		
			// Identifier is not in this array, and there's a different identifier attached to this thread already
			// We want to prevent attaching this identifier to another thread, because it probably wasn't intended.
			
			console.log('Error: Identifier conflict was prevented. Existing thread was ' + result.response.id);
			
			return;
		
		}
		else {
		
			// Identifier is in the array already, or there is no identifier attached to this thread. Probably safe to let Disqus load.
			console.log('Info: Thread exists, but it\'s safe to load.');
			
			/* * * DON'T EDIT BELOW THIS LINE */
			(function() {
				var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
				dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
				(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
			})();
		
		}
	
	});
	
	req.error(function() {
	
		// No thread found, loading Disqus is perfectly fine
		
		/* * * DON'T EDIT BELOW THIS LINE */
		(function() {
			var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
			dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
			(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
		})();
			
	});
});

</script>
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