Calendario de archivos

Este calendario funcionará como un sistema de archivos mostrándolos como un calendario que, de forma interactiva, permitirá a nuestras visitas navegar entre las entradas de nuestro blog, que serán mostradas por la fecha de publicación.
Debajo del calendario se mostrará el título de las entradas por mes, así que si hemos publicado muchas entradas, la lista se alargará demasiado.
Aunque instalemos el calendario, podremos usar al mismo tiempo si así lo queremos el widget de archivos Blogger, ya que los dos son compatibles.

Después veremos como ocultar esta lista de entradas.

Antes de empezar con la instalación del calendario, podéis ver un ejemplo de su funcionamiento en Zona de pruebas, donde también explica como instalar el calendario en una de sus entradas, aunque la idea original y todo el mérito es de PurpleMoggy.

[1] Colocaremos este código justo antes de </head>:

<!-- CODIGO CALENDARIO -->
<!-- PARTE 1 -->
<script src='http://yui.yahooapis.com/2.2.0/build/yahoo-dom-event/yahoo-dom-event.js' type='text/javascript'/>
<script src='http://yui.yahooapis.com/2.2.0/build/calendar/calendar-min.js' type='text/javascript'/>
<link href='http://yui.yahooapis.com/2.2.0/build/calendar/assets/calendar.css' rel='stylesheet' type='text/css'/>
<!-- FIN DE PARTE 1 -->
<!-- PARTE 2 -->
<script type='text/javascript'>
//<![CDATA[
/*
Created by: PurpleMoggy
http://purplemoggy.blogspot.com
*/
var _yourBlogUrl = "http://TU_BLOG.blogspot.com"; //edit this
var _yourBlogTimeZone = "+01:00"; //edit this
_yourBlogTimeZone = encodeURIComponent(_yourBlogTimeZone);
var _dayTitles = new Array("","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","");


YAHOO.namespace("example.calendar");

function cal1Init() {
YAHOO.example.calendar.cal1 = new YAHOO.widget.Calendar("cal1","cal1Container");
YAHOO.example.calendar.cal1.addMonthRenderer(1, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(2, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(3, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(4, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(5, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(6, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(7, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(8, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(9, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(10, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(11, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.addMonthRenderer(12, YAHOO.example.calendar.cal1.renderBodyCellRestricted);
YAHOO.example.calendar.cal1.selectEvent.subscribe(mySelectHandler, YAHOO.example.calendar.cal1, true);
YAHOO.example.calendar.cal1.changePageEvent.subscribe(myChangePageHandler, YAHOO.example.calendar.cal1, true);
YAHOO.example.calendar.cal1.renderEvent.subscribe(syncMonthYear);

YAHOO.example.calendar.cal1.render();
myChangePageHandler();
};

var myChangePageHandler = function(type,args,obj) {
var month = YAHOO.example.calendar.cal1.cfg.getProperty("pagedate").getMonth() + 1;
if (month.toString().length == 1) {
month = "0" + month;
}
var year = YAHOO.example.calendar.cal1.cfg.getProperty("pagedate").getFullYear();
document.getElementById("cal1Titles").innerHTML = "";
_dayTitles = new Array("","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","");

checkPostsForMonth(month, year);
};
function checkPostsForMonth(month,year) {
document.getElementById("cal1loadimg").style.display = "block";

var script = document.createElement("script");
script.setAttribute("type", "text/javascript");
var theUrl = _yourBlogUrl +"/feeds/posts/summary?alt=json-in-script&callback=checkPostsCallback&published-min=" + year + "-" + month + "-01T00%3A00%3A00" + _yourBlogTimeZone + "&published-max=" + year + "-" + month + "-31T23%3A59%3A59" + _yourBlogTimeZone + "&max-results=100";
script.setAttribute("src", theUrl);

document.documentElement.firstChild.appendChild(script);
};
function checkPostsCallback(json) {

if (json.feed.entry) {
for(i = 0; i < json.feed.entry.length; i++) {
var month = json.feed.entry[i].published.$t.substr(5,2);
var year = json.feed.entry[i].published.$t.substr(0,4);
var day = json.feed.entry[i].published.$t.substr(8,2);
var date = month + "/" + day + "/" + year;
var href = json.feed.entry[i].link[0].href;
var title = json.feed.entry[i].title.$t;

if (day.substr(0,1) == "0") {
day = day.substr(1);
}
document.getElementById("cal1Titles").innerHTML += "<li><a href='" + href + "'>" + title + "</a>";
_dayTitles[day] += "<li><a href='" + href + "'>" + title + "</a>";
YAHOO.example.calendar.cal1.addRenderer(date, myCustomRenderer);
}
YAHOO.example.calendar.cal1.render();
}
document.getElementById("cal1loadimg").style.display = "none";
};
function showDayTitles(day) {
document.getElementById("cal1Titles").innerHTML = _dayTitles[day];
}
var myCustomRenderer = function(workingDate, cell) {
var day = workingDate.toString().substr(8,2);
if (day.substr(0,1) == "0") {
day = day.substr(1);
}
cell.innerHTML = '<div onmouseover="showDayTitles(' + day + ');"><a href="javascript:void(null);" >' + YAHOO.example.calendar.cal1.buildDayLabel(workingDate) + "</a></div>";
YAHOO.util.Dom.addClass(cell, YAHOO.example.calendar.cal1.Style.CSS_CELL_SELECTABLE);
YAHOO.util.Dom.addClass(cell, YAHOO.example.calendar.cal1.Style.CSS_CELL_HIGHLIGHT1);
return YAHOO.widget.Calendar.STOP_RENDER;
}
var mySelectHandler = function(type,args,obj) {
var dates = args[0];
var date = dates[0];
var year = date[0];
var month = date[1];
if (month.toString().length == 1) {
month = "0" + month;
}
var day = date[2];
var element = YAHOO.util.Dom.getElementsByClassName("d" + day, "td", "cal1Container")[0];
if (day.toString().length == 1) {
day = "0" + day;
}
if (element.className.indexOf("highlight1") != -1) {

window.location = _yourBlogUrl + "/search?updated-min=" + year + "-" + month + "-" + day +
"T00%3A00%3A00" + _yourBlogTimeZone + "&updated-max=" + year + "-" + month + "-" + day +
"T23%3A59%3A59" + _yourBlogTimeZone;
}
};
var changeDate = function() {
YAHOO.example.calendar.cal1.setMonth(parseInt(YAHOO.util.Dom.get("cal1monthselect").value));
YAHOO.example.calendar.cal1.setYear(parseInt(YAHOO.util.Dom.get("cal1yearselect").value));
YAHOO.example.calendar.cal1.render();
myChangePageHandler();
}
var syncMonthYear = function(type) {
YAHOO.util.Dom.get("cal1monthselect").value = parseInt(YAHOO.example.calendar.cal1.cfg.getProperty("pagedate").getMonth());
var fullYear = parseInt(YAHOO.example.calendar.cal1.cfg.getProperty("pagedate").getFullYear());
var isYearFound = false;
var i = 0;
while(i < document.getElementById("cal1yearselect").options.length && !isYearFound) {
if (document.getElementById("cal1yearselect").options[i].value == fullYear) {
isYearFound = true;
}
i++;
}
if (!isYearFound) {
var option = document.createElement("option");
option.setAttribute("value", fullYear);
var text = document.createTextNode(fullYear);
option.appendChild(text);
document.getElementById("cal1yearselect").appendChild(option);
}
YAHOO.util.Dom.get("cal1yearselect").value = fullYear;
};
YAHOO.util.Event.addListener(window, "load", cal1Init);
YAHOO.util.Event.addListener("cal1dateselect", "click", changeDate);
//]]>
</script>
<!-- FIN DE PARTE 2 -->

[2] Sustituimos ahora en el código anterior donde dice:
var _yourBlogUrl = "http://TU_BLOG.blogspot.com"; //edit this
var _yourBlogTimeZone = "+01:00"; //edit this
por la url de nuestro blog sin la barra de cierre al final y la zona horaria en la que estamos publicando (para España se dejaría como está).

[3] Una vez guardados los cambios, añadiremos un nuevo elemento HTML y colocaremos este código en su interior:

<div id="cal1wrapper">
<div id="cal1select">
<select id="cal1monthselect" name="cal1monthselect">
<option value="0"/>Enero
<option value="1"/>Febrero
<option value="2"/>Marzo
<option value="3"/>Abril
<option value="4"/>Mayo
<option value="5"/>Junio
<option value="6"/>Julio
<option value="7"/>Agosto
<option value="8"/>Septiembre
<option value="9"/>Octubre
<option value="10"/>Novimbre
<option value="11"/>Diciembre
</select>
<select id="cal1yearselect" name="cal1yearselect">
<option value="1995"/>1995
<option value="1996"/>1996
<option value="1997"/>1997
<option value="1998"/>1998
<option value="1999"/>1999
<option value="2000"/>2000
<option value="2001"/>2001
<option value="2002"/>2002
<option value="2003"/>2003
<option value="2004"/>2004
<option value="2005"/>2005
<option value="2006"/>2006
<option value="2007"/>2007
<option value="2008"/>2008
<option value="2009"/>2009
<option value="2010"/>2010
<option value="2011"/>2011
<option value="2012"/>2012
<option value="2013"/>2013
<option value="2014"/>2014
<option value="2015"/>2015
<option value="2016"/>2016
<option value="2017"/>2017
<option value="2018"/>2018
<option value="2019"/>2019
</select>
<input id="cal1dateselect" value="-->" type="button"/>
</div>
<div id="cal1Container"><img style="vertical-align:middle;
" src="http://img239.imageshack.us/img239/9057/40lf8.gif"/> Cargando...</div>
<div style="clear:both;"></div>
<div id="calbackloadimg">
<pre id="cal1loadimg" style="display:none;"><img style="vertical-align:middle;" src="http://img239.imageshack.us/img239/9057/40lf8.gif"/> Cargando...</pre>
<pre id="cal1Titles"></pre>
</div>
</div>

Guardamos los cambios y ya tendremos el calendario-archivo funcionando.

[4] Para ocultar la lista de entradas que aparece debajo de nuestro nuevo calendario y la imagen de carga, añadimos antes de ]]></b:skin> estas líneas de css:

#calbackloadimg{
display:none;
}

Si vas a utilizar las imágenes de esta entrada, subelas antes a tu propio alojamiento. No hagas Hotlinking.