facebook、twitter、はてなブックマークで共有された数を集計するJavaScript

social_counts.js

function insertScript(url) {
  var target = document.createElement('script');
	target.charset = 'utf-8';
	target.src = url;
	document.body.appendChild(target);
}

function likeCount(_url) {
	var pageURL = (_url) ? _url : location.href;
	pageURL = encodeURIComponent(pageURL);
	var callback_name = 'jsonp_fb_like';
	var url = 'http://graph.facebook.com/' + pageURL + '?callback=' + callback_name;

	insertScript(url);

	window[callback_name] = function(data){
		var count = (data.shares) ? data.shares : 0;
		console.log('fb like: ' + count);
	};
}

function tweetCount(_url) {
	var pageURL = (_url) ? _url : location.href;
	pageURL = encodeURIComponent(pageURL);
	var callback_name = 'jsonp_tw';
	var url = 'http://urls.api.twitter.com/1/urls/count.json?url=' + pageURL + '&callback=' + callback_name  + '&noncache=' + new Date();

	insertScript(url);

	window[callback_name] = function(data){
		console.log('tw: ' + data.count);
	};
}

function hatebuCount(_url) {
	var pageURL = (_url) ? _url : location.href;
	pageURL = encodeURIComponent(pageURL);
	var callback_name = 'jsonp_hatebu';
	var url = 'http://api.b.st-hatena.com/entry.count?url=' + pageURL + '&callback=' + callback_name;

	insertScript(url);

	window[callback_name] = function(data){
		var count = (data) ? data : 0;
		console.log('hatebu: ' + count);
	};
}

likeCount();
tweetCount();
hatebuCount();

// result sample
// hatebu: 1
// fb like: 56
// tw: 982