var services = {
facebook: {
counterUrl: 'http://graph.facebook.com/fql?q=SELECT+total_count+FROM+link_stat+WHERE+url%3D%22{url}%22&callback=?',
convertNumber: function(data) {
return data.data[0].total_count;
}
},
twitter: {
counterUrl: 'http://urls.api.twitter.com/1/urls/count.json?url={url}&callback=?',
convertNumber: function(data) {
return data.count;
}
},
vkontakte: {
counterUrl: 'http://vkontakte.ru/share.php?act=count&url={url}&index={index}',
counter: function(jsonUrl, deferred) {
var options = services.vkontakte;
if (!options._) {
options._ = [];
if (!window.VK) window.VK = {};
window.VK.Share = {
count: function(idx, number) {
options._[idx].resolve(number);
}
};
}
var index = options._.length;
options._.push(deferred);
$.ajax({
url: makeUrl(jsonUrl, {index: index}),
dataType: 'jsonp'
});
}
}
};
/**
* Counters manager
*/
var counters = {
promises: {},
fetch: function(service, url) {
if (!counters.promises[service]) counters.promises[service] = {};
var servicePromises = counters.promises[service];
if (servicePromises[url]) {
return servicePromises[url];
}
else {
var options = services[service],
deferred = $.Deferred(),
jsonUrl = options.counterUrl && makeUrl(options.counterUrl, {url: url});
if ($.isFunction(options.counter)) {
options.counter(jsonUrl, deferred);
}
else if (options.counterUrl) {
$.getJSON(jsonUrl)
.done(function(data) {
try {
var number = data;
if ($.isFunction(options.convertNumber)) {
number = options.convertNumber(data);
}
deferred.resolve(number);
}
catch (e) {
deferred.reject(e);
}
});
}
servicePromises[url] = deferred.promise();
return servicePromises[url];
}
}
};
function makeUrl(url, context) {
return template(url, context, encodeURIComponent);
}
function template(tmpl, context, filter) {
return tmpl.replace(/\{([^\}]+)\}/g, function(m, key) {
// If key don't exists in the context we should keep template tag as is
return key in context ? (filter ? filter(context[key]) : context[key]) : m;
});
}
Запуск:
var url = 'http://habrahabr.ru';
$.each(services, function(service) {
counters.fetch(service, url).done(function(number) {
number = parseInt(number, 10);
if (!number) number = 0;
console.log(number);
});
});
Средний
