// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults
function hide_element(element) {
  if (element instanceof Array)
    for (var i = 0; one_elem = element[i]; i++)
    {
      $(one_elem).style.display='none';
    }
  else
    $(element).style.display='none';
}

// Thanks to http://www.quirksmode.org/js/cookies.html
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function showHideLogin()
{
  twitter_name = readCookie('twitter_screen_name');
  if (twitter_name == null)
  {
    $('twitter_not_logged_in').show();
    $('twitter_logged_in').hide();
  }
  else
  {
    $('twitter_username').innerHTML = twitter_name;
    $('twitter_not_logged_in').hide();
    $('twitter_logged_in').show();
  }
}

// function signOut()
// {
//   eraseCookie('twitter_screen_name');
//   showHideLogin();
// }

function show_friends(friends)
{
  prefix = 'friend_';
  if (friends.length == 0)
    return;
    
  $$('.friend').each(function(f)
  {
    follow = f.down('.follow');
    following = f.down('.following');

    f_id = f.id.substr(prefix.length, f.id.length - prefix.length)
    friend_index = friends.indexOf(parseInt(f_id));

    if (friend_index == -1)
    {
      follow.show();
      follow.down('.follow-button').onclick = function(){
        prefix = 'friend_';
        friend_div = this.up('.friend');
        friend_id = friend_div.id.substr(prefix.length, f.id.length - prefix.length);
        var params = {};
        // params['authenticity_token'] = window._token;
        params['user'] = friend_id;
        new Ajax.Request("/twitter/follow", {parameters:params, onFailure:function(){
          $('notice_text').update('Unable to follow. Please try again later.');
          $('notice').show();
        }});
      }
      following.hide();
    }
    else
    {
      follow.hide();
      following.show();
    }
  });
}

function get_friends(force)
{
  if (readCookie('twitter_screen_name') != null && (typeof tweeters!="undefined"))
  {
    var params = {};
    // params['authenticity_token'] = window._token;
    params['tweeters'] = tweeters.join(',');
    if (force)
      params['force'] = 1;
    new Ajax.Request('/twitter/friend_ids', {parameters:params});
  }
}

function getLocalTime()
{
  if (!readCookie('timezoneoffset'))
  {
    var d = new Date();
    createCookie('timezoneoffset',d.getTimezoneOffset());
  }
}

function updateTweetTime()
{
  $$('.gmt_tweet_time').each(function(f)
  {
    tweet_date = new Date(f.readAttribute('twitter_status_time') * 1000);
    f.update(tweet_date.format("h:MM TT mmm dS"));
  });
}

function  showFlash()
{
  if (readCookie('flash'))
  {
    $('notice_text').update(unescape(readCookie('flash').replace(/\+/g, ' ')));
    $('notice').show();
    eraseCookie('flash');
  }
}

/*
 * Date Format 1.2.3
 * (c) 2007-2009 Steven Levithan <stevenlevithan.com>
 * MIT license
 *
 * Includes enhancements by Scott Trenda <scott.trenda.net>
 * and Kris Kowal <cixar.com/~kris.kowal/>
 *
 * Accepts a date, a mask, or a date and a mask.
 * Returns a formatted version of the given date.
 * The date defaults to the current date/time.
 * The mask defaults to dateFormat.masks.default.
 */

var dateFormat = function () {
	var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
		timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
		timezoneClip = /[^-+\dA-Z]/g,
		pad = function (val, len) {
			val = String(val);
			len = len || 2;
			while (val.length < len) val = "0" + val;
			return val;
		};

	// Regexes and supporting functions are cached through closure
	return function (date, mask, utc) {
		var dF = dateFormat;

		// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
		if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
			mask = date;
			date = undefined;
		}

		// Passing date through Date applies Date.parse, if necessary
		date = date ? new Date(date) : new Date;
		if (isNaN(date)) throw SyntaxError("invalid date");

		mask = String(dF.masks[mask] || mask || dF.masks["default"]);

		// Allow setting the utc argument via the mask
		if (mask.slice(0, 4) == "UTC:") {
			mask = mask.slice(4);
			utc = true;
		}

		var	_ = utc ? "getUTC" : "get",
			d = date[_ + "Date"](),
			D = date[_ + "Day"](),
			m = date[_ + "Month"](),
			y = date[_ + "FullYear"](),
			H = date[_ + "Hours"](),
			M = date[_ + "Minutes"](),
			s = date[_ + "Seconds"](),
			L = date[_ + "Milliseconds"](),
			o = utc ? 0 : date.getTimezoneOffset(),
			flags = {
				d:    d,
				dd:   pad(d),
				ddd:  dF.i18n.dayNames[D],
				dddd: dF.i18n.dayNames[D + 7],
				m:    m + 1,
				mm:   pad(m + 1),
				mmm:  dF.i18n.monthNames[m],
				mmmm: dF.i18n.monthNames[m + 12],
				yy:   String(y).slice(2),
				yyyy: y,
				h:    H % 12 || 12,
				hh:   pad(H % 12 || 12),
				H:    H,
				HH:   pad(H),
				M:    M,
				MM:   pad(M),
				s:    s,
				ss:   pad(s),
				l:    pad(L, 3),
				L:    pad(L > 99 ? Math.round(L / 10) : L),
				t:    H < 12 ? "a"  : "p",
				tt:   H < 12 ? "am" : "pm",
				T:    H < 12 ? "A"  : "P",
				TT:   H < 12 ? "AM" : "PM",
				Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
				o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
				S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
			};

		return mask.replace(token, function ($0) {
			return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
		});
	};
}();

// Some common format strings
dateFormat.masks = {
	"default":      "ddd mmm dd yyyy HH:MM:ss",
	shortDate:      "m/d/yy",
	mediumDate:     "mmm d, yyyy",
	longDate:       "mmmm d, yyyy",
	fullDate:       "dddd, mmmm d, yyyy",
	shortTime:      "h:MM TT",
	mediumTime:     "h:MM:ss TT",
	longTime:       "h:MM:ss TT Z",
	isoDate:        "yyyy-mm-dd",
	isoTime:        "HH:MM:ss",
	isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
	isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};

// Internationalization strings
dateFormat.i18n = {
	dayNames: [
		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
		"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
	],
	monthNames: [
		"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
		"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
	]
};

// For convenience...
Date.prototype.format = function (mask, utc) {
	return dateFormat(this, mask, utc);
};