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/**
* remy sharp / http://remysharp.com
* http://remysharp.com/2007/05/18/add-twitter-to-your-blog-step-by-step/
*
* @params
* cssIdOfContainer: e.g. twitters
* options:
* {
* id: {String} username,
* count: {Int} 1-20, defaults to 1 - max limit 20
* prefix: {String} '%name% said', defaults to blank
* clearContents: {Boolean} true, removes contents of element specified in cssIdOfContainer, defaults to true
* ignoreReplies: {Boolean}, skips over tweets starting with '@', defaults to false
* template: {String} HTML template to use for LI element (see URL above for examples), defaults to predefined template
* enableLinks: {Boolean} linkifies text, defaults to true,
* timeout: {Int} How long before triggering onTimeout, defaults to 10 seconds if onTimeout is set
* onTimeoutCancel: {Boolean} Completely cancel twitter call if timedout, defaults to false
* onTimeout: {Function} Function to run when the timeout occurs. Function is bound to element specified with
* cssIdOfContainer (i.e. 'this' keyword)
*
* CURRENTLY DISABLED DUE TO CHANGE IN TWITTER API:
* withFriends: {Boolean} includes friend's status
*
* }
*
* @license MIT (MIT-LICENSE.txt)
* @version 1.11 - Added timeout functionality, and removed withFriends while Twitter works out API changes
* @date $Date: 2008-05-31 14:26:49 +0100 (Sat, 31 May 2008) $
*/
// to protect variables from resetting if included more than once
if (typeof renderTwitters != 'function') (function () {
/** Private variables */
var browser = (function() {
var b = navigator.userAgent.toLowerCase();
// Figure out what browser is being used
return {
safari: /webkit/.test(b),
opera: /opera/.test(b),
msie: /msie/.test(b) && !(/opera/).test(b),
mozilla: /mozilla/.test(b) && !(/(compatible|webkit)/).test(b)
};
})();
var guid = 0;
var readyList = [];
var isReady = false;
/** Global functions */
// to create a public function within our private scope, we attach the
// the function to the window object
window.renderTwitters = function (obj, options) {
// private shortcuts
function node(e) {
return document.createElement(e);
}
function text(t) {
return document.createTextNode(t);
}
var target = document.getElementById(options.twitterTarget);
var data = null;
var ul = node('ul'), li, statusSpan, timeSpan, i, max = obj.length > options.count ? options.count : obj.length;
for (i = 0; i < max && obj[i]; i++) {
data = getTwitterData(obj[i]);
if (options.ignoreReplies && obj[i].text.substr(0, 1) == '@') {
max++;
continue; // skip
}
li = node('li');
if (options.template) {
li.innerHTML = options.template.replace(/%([a-z_\-\.]*)%/ig, function (m, l) {
var r = data[l] + "" || "";
if (l == 'text' && options.enableLinks) r = linkify(r);
return r;
});
} else {
statusSpan = node('span');
statusSpan.className = 'twitterStatus';
timeSpan = node('span');
timeSpan.className = 'twitterTime';
statusSpan.innerHTML = obj[i].text; // forces the entities to be converted correctly
if (options.enableLinks == true) {
statusSpan.innerHTML = linkify(statusSpan.innerHTML);
}
timeSpan.innerHTML = relative_time(obj[i].created_at);
if (options.prefix) {
var s = node('span');
s.className = 'twitterPrefix';
s.innerHTML = options.prefix.replace(/%(.*?)%/g, function (m, l) {
return obj[i].user[l];
});
li.appendChild(s);
li.appendChild(text(' ')); // spacer :-(
}
li.appendChild(statusSpan);
li.appendChild(text(' '));
li.appendChild(timeSpan);
}
ul.appendChild(li);
}
if (options.clearContents) {
while (target.firstChild) {
target.removeChild(target.firstChild);
}
}
target.appendChild(ul);
};
window.getTwitters = function (target, id, count, options) {
guid++;
if (typeof id == 'object') {
options = id;
id = options.id;
count = options.count;
}
// defaulting options
if (!count) count = 1;
if (options) {
options.count = count;
} else {
options = {};
}
if (!options.timeout && typeof options.onTimeout == 'function') {
options.timeout = 10;
}
if (typeof options.clearContents == 'undefined') {
options.clearContents = true;
}
// Hack to disable withFriends, twitter changed their API so this requires auth
// http://getsatisfaction.com/twitter/topics/friends_timeline_api_call_suddenly_requires_auth
if (options.withFriends) options.withFriends = false;
// need to make these global since we can't pass in to the twitter callback
options['twitterTarget'] = target;
// default enable links
if (typeof options.enableLinks == 'undefined') options.enableLinks = true;
// this looks scary, but it actually allows us to have more than one twitter
// status on the page, which in the case of my example blog - I do!
window['twitterCallback' + guid] = function (obj) {
if (options.timeout) {
clearTimeout(window['twitterTimeout' + guid]);
}
renderTwitters(obj, options);
};
// check out the mad currying!
ready((function(options, guid) {
return function () {
// if the element isn't on the DOM, don't bother
if (!document.getElementById(options.twitterTarget)) {
return;
}
var url = 'http://www.twitter.com/statuses/' + (options.withFriends ? 'friends_timeline' : 'user_timeline') + '/' + id + '.json?callback=twitterCallback' + guid + '&count=20';
if (options.timeout) {
window['twitterTimeout' + guid] = setTimeout(function () {
// cancel callback
if (options.onTimeoutCancel) window['twitterCallback' + guid] = function () {};
options.onTimeout.call(document.getElementById(options.twitterTarget));
}, options.timeout);
}
var script = document.createElement('script');
script.setAttribute('src', url);
document.getElementsByTagName('head')[0].appendChild(script);
};
})(options, guid));
};
// GO!
DOMReady();
/** Private functions */
function getTwitterData(orig) {
var data = orig, i;
for (i in orig.user) {
data['user_' + i] = orig.user[i];
}
data.time = relative_time(orig.created_at);
return data;
}
function ready(callback) {
if (!isReady) {
readyList.push(callback);
} else {
callback.call();
}
}
function fireReady() {
isReady = true;
var fn;
while (fn = readyList.shift()) {
fn.call();
}
}
// ready and browser adapted from John Resig's jQuery library (http://jquery.com)
function DOMReady() {
if ( browser.mozilla || browser.opera ) {
document.addEventListener( "DOMContentLoaded", fireReady, false );
} else if ( browser.msie ) {
// If IE is used, use the excellent hack by Matthias Miller
// http://www.outofhanwell.com/blog/index.php?title=the_window_onload_problem_revisited
// Only works if you document.write() it
document.write("<\/script>");
// Use the defer script hack
var script = document.getElementById("__ie_init");
// script does not exist if jQuery is loaded dynamically
if (script) {
script.onreadystatechange = function() {
if ( this.readyState != "complete" ) return;
this.parentNode.removeChild( this );
fireReady.call();
};
}
// Clear from memory
script = null;
// If Safari is used
} else if ( browser.safari ) {
// Continually check to see if the document.readyState is valid
var safariTimer = setInterval(function () {
// loaded and complete are both valid states
if ( document.readyState == "loaded" ||
document.readyState == "complete" ) {
// If either one are found, remove the timer
clearInterval( safariTimer );
safariTimer = null;
// and execute any waiting functions
fireReady.call();
}
}, 10);
}
}
function relative_time(time_value) {
var values = time_value.split(" ");
time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
var parsed_date = Date.parse(time_value);
var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
delta = delta + (relative_to.getTimezoneOffset() * 60);
var r = '';
if (delta < 60) {
r = 'less than a minute ago';
} else if(delta < 120) {
r = 'about a minute ago';
} else if(delta < (45*60)) {
r = (parseInt(delta / 60)).toString() + ' minutes ago';
} else if(delta < (2*90*60)) { // 2* because sometimes read 1 hours ago
r = 'about an hour ago';
} else if(delta < (24*60*60)) {
r = 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
} else if(delta < (48*60*60)) {
r = '1 day ago';
} else {
r = (parseInt(delta / 86400)).toString() + ' days ago';
}
return r;
}
function linkify(s) {
return s.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/g, function(m) {
return m.link(m);
}).replace(/@[\S]+/g, function(m) {
return '' + m + '';
});
}
})();