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<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:urwg="http://www.gridforum.org/2003/ur-wg"
    xmlns:SimpleDateFormat="http://xml.apache.org/xalan/java/java.text.SimpleDateFormat" xmlns:Date="http://xml.apache.org/xalan/java/java.util.Date">

    <!-- Declaration of parameters -->
    <!-- if you want to use a Sakai value or a passed in parameter from the -->
    <!-- query string, you should state it here -->

    <!-- The id parameter from the query string -->
    <xsl:param name="id"/>

    <!-- The sakai.tool.placement.ia parameter from the query string -->
    <xsl:param name="sakai.tool.placement.id"/>

    <!-- a number we can switch on to display different content for each page -->
    <xsl:param name="pageNumber"/>

    <!-- if passed, the created variable will be a key to a single blog Entry -->
    <xsl:param name="created"/>

    <!-- Declare output method -->
    <xsl:output method="html"/>

    <!-- Main Template outputs our HTML page -->
    <xsl:template match="/">
        <xsl:choose>
            <xsl:when test="$pageNumber=4"> Rss! </xsl:when>
            <xsl:otherwise>
                <html>
                    <head>
                        <title>My Blog</title>
                        <link rel="stylesheet" type="text/css">
                            <!--<xsl:attribute name="href">blogStyle.css</xsl:attribute>-->
                            <xsl:attribute name="href">
                                <xsl:value-of select="/ospiPresentation/presentationFiles/style/artifact/fileArtifact/uri"/>
                            </xsl:attribute>
                        </link>
                    </head>
                    <body>
                        <div id="wrapper">
                            <div id="header">
                                <xsl:attribute name="style">
                                    <xsl:text>background-image:url('</xsl:text>
                                    <xsl:value-of select="/ospiPresentation/presentationFiles/backgroundImage/artifact/fileArtifact/uri"/>
                                    <xsl:text>')</xsl:text>
                                </xsl:attribute>
                                <img>
                                    <xsl:attribute name="src">
                                        <xsl:value-of select="/ospiPresentation/presentationFiles/myLogo/artifact/fileArtifact/uri"/>
                                    </xsl:attribute>
                                    <xsl:attribute name="alt">My Institutions Logo</xsl:attribute>
                                    <xsl:attribute name="style">float: right;</xsl:attribute>
                                </img>
                                <h1>My Blog</h1>
                            </div>
                            <!-- a little menu to navigate -->
                            <div id="menu">
                                <ul>
                                    <li>
                                        <xsl:call-template name="menuLink">
                                            <xsl:with-param name="pageNumber"/>
                                            <xsl:with-param name="text">Last 5</xsl:with-param>
                                        </xsl:call-template>
                                    </li>
                                    <li>
                                        <xsl:call-template name="menuLink">
                                            <xsl:with-param name="pageNumber">1</xsl:with-param>
                                            <xsl:with-param name="text">About Me</xsl:with-param>
                                        </xsl:call-template>
                                    </li>
                                    <li>
                                        <xsl:call-template name="menuLink">
                                            <xsl:with-param name="pageNumber">2</xsl:with-param>
                                            <xsl:with-param name="text">Entry Index</xsl:with-param>
                                        </xsl:call-template>
                                    </li>
                                    <li>
                                        <xsl:call-template name="menuLink">
                                            <xsl:with-param name="pageNumber">4</xsl:with-param>
                                            <xsl:with-param name="text">RSS Feed</xsl:with-param>
                                        </xsl:call-template>
                                    </li>
                                </ul>
                            </div>
                            <div id="contentWrapper">
                                <div id="entryNav">
                                    <h3>Blog Posts</h3>
                                    <ul>
                                        <xsl:for-each select="/ospiPresentation/blogEntry/artifact">
                                            <xsl:sort data-type="number"
                                                select="Date:getTime(SimpleDateFormat:parse(SimpleDateFormat:new('EEE MMM dd kk:mm:ss zzz yyyy'), ./metaData/repositoryNode/created))"
                                                order="descending"/>
                                            <li>
                                                <a>
                                                    <xsl:attribute name="href">
                                                        <xsl:text disable-output-escaping="yes">viewPresentation.osp?sakai.tool.placement.id=</xsl:text>
                                                        <xsl:value-of select="$sakai.tool.placement.id"/>
                                                        <xsl:text disable-output-escaping="yes">&amp;id=</xsl:text>
                                                        <xsl:value-of select="$id"/>
                                                        <xsl:text disable-output-escaping="yes">&amp;pageNumber=3&amp;created=</xsl:text>
                                                        <xsl:value-of select="./metaData/repositoryNode/created"/>
                                                    </xsl:attribute>
                                                    <xsl:value-of select="./metaData/displayName"/>
                                                </a>
                                            </li>
                                        </xsl:for-each>
                                    </ul>
                                </div>
                                <!-- a switch to select content for this page based on the value of pageNumber -->
                                <div id="content">
                                    <xsl:choose>
                                        <xsl:when test="$pageNumber=1">
                                            <!-- about me --> About me Page </xsl:when>
                                        <xsl:when test="$pageNumber=2">
                                            <!-- display an index of all blog entries -->
                                            <h3>All Entries</h3>
                                            <ul id="datedEntryList">
                                                <xsl:for-each select="/ospiPresentation/blogEntry/artifact">
                                                    <xsl:sort data-type="number"
                                                        select="Date:getTime(SimpleDateFormat:parse(SimpleDateFormat:new('EEE MMM dd kk:mm:ss zzz yyyy'), ./metaData/repositoryNode/created))"
                                                        order="descending"/>
                                                    <li>
                                                        <a>
                                                            <xsl:attribute name="href">
                                                                <xsl:text disable-output-escaping="yes">viewPresentation.osp?sakai.tool.placement.id=</xsl:text>
                                                                <xsl:value-of select="$sakai.tool.placement.id"/>
                                                                <xsl:text disable-output-escaping="yes">&amp;id=</xsl:text>
                                                                <xsl:value-of select="$id"/>
                                                                <xsl:text disable-output-escaping="yes">&amp;pageNumber=3&amp;created=</xsl:text>
                                                                <xsl:value-of select="./metaData/repositoryNode/created"/>
                                                            </xsl:attribute>
                                                            <xsl:value-of select="./metaData/displayName"/> - <xsl:value-of select="./metaData/repositoryNode/created"/>
                                                        </a>
                                                    </li>
                                                </xsl:for-each>
                                            </ul>
                                        </xsl:when>
                                        <xsl:when test="$pageNumber=3">
                                            <!-- individual entry displayed -->
                                            <xsl:for-each select="/ospiPresentation/blogEntry/artifact[metaData/repositoryNode/created=$created]">
                                                <xsl:call-template name="entry">
                                                    <xsl:with-param name="title">
                                                        <xsl:value-of select="./metaData/displayName"/>
                                                    </xsl:with-param>
                                                    <xsl:with-param name="date">
                                                        <xsl:value-of select="./metaData/repositoryNode/created"/>
                                                    </xsl:with-param>
                                                    <xsl:with-param name="body">
                                                        <xsl:value-of select="./structuredData/blogEntry/entryBody"/>
                                                    </xsl:with-param>
                                                </xsl:call-template>
                                            </xsl:for-each>
                                        </xsl:when>
                                        <xsl:otherwise>
                                            <!-- last 5 blog entries -->                                            
                                            <xsl:for-each select="/ospiPresentation/blogEntry/artifact[position() &gt; 0]">
                                                <!-- sort by year, moth, day created dates formatted like: Tue Jan 09 09:59:52 EST 2007 -->
                                                <xsl:sort data-type="number"
                                                    select="Date:getTime(SimpleDateFormat:parse(SimpleDateFormat:new('EEE MMM dd kk:mm:ss zzz yyyy'), ./metaData/repositoryNode/created))"
                                                    order="descending"/>
                                                <xsl:call-template name="entry">
                                                    <xsl:with-param name="title">
                                                        <xsl:value-of select="./metaData/displayName"/>
                                                    </xsl:with-param>
                                                    <xsl:with-param name="date">
                                                        <xsl:value-of select="./metaData/repositoryNode/created"/>
                                                    </xsl:with-param>
                                                    <xsl:with-param name="body">
                                                        <xsl:value-of select="./structuredData/blogEntry/entryBody"/>
                                                    </xsl:with-param>
                                                </xsl:call-template>
                                            </xsl:for-each>
                                        </xsl:otherwise>
                                    </xsl:choose>
                                </div>
                                <!-- content -->
                                <div style="clear: both"/>
                            </div>
                            <!-- contentWrapper -->
                        </div>
                        <!-- end wrapper div -->
                    </body>
                </html>

            </xsl:otherwise>
        </xsl:choose>

    </xsl:template>

    <xsl:template name="entry">
        <xsl:param name="title"/>
        <xsl:param name="date"/>
        <xsl:param name="body"/>
        <div class="entry">
            <h3>
                <xsl:value-of select="$title"/>
            </h3>
            <div class="date">
                <xsl:value-of select="$date"/>
            </div>
            <div class="entryBody">
                <xsl:value-of select="$body" disable-output-escaping="yes"/>
            </div>
        </div>
    </xsl:template>

    <!-- a named template to menu display links correctly -->
    <xsl:template name="menuLink">
        <xsl:param name="pageNumber"/>
        <xsl:param name="text"/>
        <a>
            <xsl:attribute name="href">
                <xsl:text disable-output-escaping="yes">viewPresentation.osp?sakai.tool.placement.id=</xsl:text>
                <xsl:value-of select="$sakai.tool.placement.id"/>
                <xsl:text disable-output-escaping="yes">&amp;id=</xsl:text>
                <xsl:value-of select="$id"/>
                <xsl:text disable-output-escaping="yes">&amp;pageNumber=</xsl:text>
                <xsl:value-of select="$pageNumber"/>
            </xsl:attribute>
            <xsl:value-of select="$text"/>
        </a>
    </xsl:template>

    <!-- from O'Reilly XSLT Cookbook, 2nd Edition -->
    <!-- Recipe 4.4. Calculating Julian and Absolute Day Numbers from a Specified Date -->
    <xsl:template name="calculate-julian-day">
        <xsl:param name="year"/>
        <xsl:param name="month"/>
        <xsl:param name="day"/>

        <xsl:variable name="a" select="floor((14 - $month) div 12)"/>
        <xsl:variable name="y" select="$year + 4800 - $a"/>
        <xsl:variable name="m" select="$month + 12 * $a - 3"/>

        <xsl:value-of select="$day + floor((153 * $m + 2) div 5) + $y * 365 + 
            floor($y div 4) - floor($y div 100) + floor($y div 400) - 
            32045"/>

    </xsl:template>

</xsl:stylesheet>