=====JW Calendar action reviewed=====
>>Working for 1.1.6.0 to 1.1.6.4 (latest)>>{{lastedit show="2"}}

I like the idea of WikiCalendar, but I would like to get more from this.

I have been reworking this code to trigger the opening/creation of a dedicated WikiPage when you click on any day.
The idea is to be able to use **personal calendars** as well as **project type calendars**. So you can allocate a **calendar name** (must be a CamelCase name) and call the action like this:
""{{calendar month="11" year="2004" calendarname="MyProject"}}""
The optional calendarname is defaulted to the user WikiName.

When you then click on the 30th of November, the system will open a page named MyProject20041130. It would be a good idea to group such pages under a dedicated category like CategoryCalendarMyProject.

//I would like to improve this further on by checking if a page already exists for each day and have a different style or an icon pointing this.//
//I would also allow as an option to include the page of the selected day close to the calendar itself.//

~& I noticed that the code is already doing this. However, it was using the ExistsPage() method which means it was sending one query per date. A much more efficient solution follows. It should be inserted into the code around line 86 (where the todo for the camel case check is). -- DennyShimkoski %%(php)
$existingPages = array();
$result = $this->Query('SELECT tag FROM ' . $this->config['table_prefix'] . "pages WHERE tag REGEXP('$calendar_name\[0-9]{8,8}')");
if (mysql_num_rows($result)) while ($row = mysql_fetch_array($result)) $existingPages[] = $row['tag'];
%% Then line 216 (call to ExistsPage()) should be replace with %%(php)
	if (in_array($pagename, $existingPages))
%% The CSS should probably be changed too. For instance, in line 232, the $dayclass is being applied to the anchor tag. It would probably give the CSS wizards more room to fly if we changed it to %%(php)
						echo '                <td class='. $dayclass . '><a href="'.$pagename.'">'.$day."</a></td>\n";
%% Then we can change the CSS definition from table.calendar a.created to table.calendar td.created. The end result is the full cell being colored in, rather than just the area of the anchor tag. ... Just added some more calendar ideas to DennysCalendarExperiments.

Added in the header:
%%(php)
 * @input                string   $calendarname  optional: prefix for the calendar pages to be created - Must be a CamelCase word;
 *                                default: WikiName from the user
%%

Added in the constants section:
%%(php)
define ('USER_NAME',$this->GetUserName()); 
define ('BASE_URL',$this->config['base_url']);  
%%

Added in the PARAMETERS Interface 
%%(php)
$calendarname   = USER_NAME;
%%

Added a few lines after in the PARAMETERS Interface part 1)
%%(php)
$uCalendarname = $vars['calendarname'];
if ($uCalendarname) $calendarname = $uCalendarname;
//ToDo: check that it is a CamelCase word
%%

Changed in the output section (provided that the [[WikkaDevelopment ExistsPage()]] function is part of the Wikka object in wikka.php)
%%(php)
Old:
// handle markup for current day or any other day
				$calday = sprintf('%4d:%02d:%02d',$year,$month,$day);
				if ($calday == $today)
				{
						echo '                <td title="'.TODAY.'" class="currentday">'.$day."</td>\n";
				}
				else
				{
						echo '                <td>'.$day."</td>\n";
				}
				// end week row

New:
// handle markup for current day or any other day
						$calday = sprintf('%4d:%02d:%02d',$year,$month,$day);
			   $pagename = sprintf('%s%4d%02d%02d', $calendarname,$year,$month,$day);
			   if ($this->ExistsPage($pagename))
			   {
			   $pagename = BASE_URL.$pagename;
			   $dayclass = '"created"';
			   }
			   else
			   {
			   $pagename = sprintf('%s%s/edit', BASE_URL,$pagename);
			   $dayclass = '"new"';
			   }	
						if ($calday == $today)
					   {
								echo '                <td title="'.TODAY.'" class="currentday">'.'<a href="'.$pagename.'" class='.$dayclass.'>'.$day."</a></td>\n";
					   }
					   else
					   {
								echo '                <td>'.'<a href="'.$pagename.'" class='.$dayclass.'>'.$day."</a></td>\n";
					   }
					   // end week row
%%

Added in the CSS file something like this with less awful colors :-(
%%(css)
table.calendar a.created {
		color: #AABBFF;
		background-color: #00CCCC;
		text-decoration: none;
}
%%

In case you just want the full code after modification:
----
%%(php)
<?php
/**
 * Display a calendar face for a specified or the current month.
 *
 * Specifying a month and/or year in the action itself results in a "static" calendar face without
 * navigation; conversely, providing no parameters in the action results in a calendar face with
 * navigation links to previous, current and next month, with URL parameters determining which
 * month is shown (with the current month as default).
 *
 * You can have one "dynamic" (navigable) calendar on a page (multiple ones would just be the same)
 * and any number of "static" calendars.
 *
 * The current date (if visible) gets a special class to allow a different styling with CSS.
 *
 * Credit:
 * This action was inspired mainly by the "Calendar Menu" code written by
 * {@link http://www.blazonry.com/about.php Marcus Kazmierczak}
 * (© 1998-2002 Astonish Inc.) which we traced back as being the ultimate origin of this code
 * although our starting point was actually a (probably second-hand) variant found on the web which
 * did not contain any attribution.
 * However, not much of the original code is left in this version. Nevertheless, credit to
 * Marcus Kazmierczak for the original that inspired this, however indirectly: Thanks!
 *
 * @package                Actions
 * @subpackage        Date and Time
 * @name                Calendar
 *
 * @author                {@link http://wikka.jsnx.com/GmBowen GmBowen} (first draft)
 * @author                {@link http://wikka.jsnx.com/JavaWoman JavaWoman} (more modifications)
 * @version                0.8
 * @since                Wikka 1.1.6.0
 *
 * @input                integer  $year  optional: 4-digit year of the month to be displayed;
 *                                default: current year
 *                                the default can be overridden by providing a URL parameter 'year'
 * @input                integer  $month  optional: number of month (1 or 2 digits) to be displayed;
 *                                default: current month
 *                                the default can be overridden by providing a URL parameter 'month'
 * @input                string   $calendarname  optional: prefix for the calendar pages to be created - Must be a CamelCase word;
 *                                default: WikiName from the user
 * @output                data table for specified or current month
 *
 * @todo                - take care we don't go over date limits for PHP with navigation links
 *                                - configurable first day of week
 */

// ***** CONSTANTS section *****
define('MIN_DATETIME', strtotime('1970-01-01 00:00:00 GMT'));                # earliest timestamp PHP can handle (Windows and some others - to be safe)
define('MAX_DATETIME', strtotime('2038-01-19 03:04:07 GMT'));                # latest timestamp PHP can handle
define('MIN_YEAR', date('Y',MIN_DATETIME));
define('MAX_YEAR', date('Y',MAX_DATETIME)-1);                                                # don't include partial January 2038
// not-quite-constants
$daysInMonth = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
define('CUR_YEAR', date('Y',mktime()));
define('CUR_MONTH', date('n',mktime()));
// format string for locale-specific month (%B) + 4-digit year (%Y) used for caption and title attributes
// NOTE: monthname is locale-specific but order of month and year may need to be switched: hence the double quotes!
define('LOC_MON_YEAR', "%B %Y");                                                                                                                                        # i18n
define('FMT_SUMMARY', "Calendar for %s");                                                                                                                        # i18n
define('TODAY', "today");    
define ('USER_NAME',$this->GetUserName()); 
define ('BASE_URL',$this->config['base_url']);                                                                                                                                                  # i18n
// ***** END CONSTANTS section *****

// ***** (ACTION) PARAMETERS Interface *****
// set parameter defaults: current year and month
$year        = CUR_YEAR;
$month        = CUR_MONTH;
$calendarname   = USER_NAME;

// get and interpret parameters
// 1) overrride defaults with parameters provided in URL (accept only valid values)
if (isset($_GET['year']))
{
		$uYear = (int)$_GET['year'];
		if ($uYear >= MIN_YEAR && $uYear <= MAX_YEAR) $year = $uYear;
}
if (isset($_GET['month']))
{
		$uMonth = (int)$_GET['month'];
		if ($uMonth >= 1 && $uMonth <= 12) $month = $uMonth;
}

$uCalendarname = $vars['calendarname'];
if ($uCalendarname) $calendarname = $uCalendarname;
//ToDo: check that it is a CamelCase word

// 2) override with parameters provided in action itself (accept only valid values)
$hasActionParams = FALSE;
if (is_array($vars))
{
		foreach ($vars as $param => $value)
		{
				switch ($param)
				{
						case 'year':
								$uYear = (int)trim($value);
								if ($uYear >= MIN_YEAR && $uYear <= MAX_YEAR)
								{
										$year = $uYear;
										$hasActionParams = TRUE;
								}
								break;
						case 'month':
								$uMonth = (int)trim($value);
								if ($uMonth >= 1 && $uMonth <= 12)
								{
										$month = $uMonth;
										$hasActionParams = TRUE;
								}
								break;
				}
		}
}
// ***** (ACTION) PARAMETERS Interface *****

// ***** DERIVED VARIABLES *****
// derive which weekday the first is on
$datemonthfirst = sprintf('%4d-%02d-%02d',$year,$month,1);
$firstwday = strftime('%w',strtotime($datemonthfirst));                                                                                                # i18n

// derive (locale-specific) caption text
$monthYear        = strftime(LOC_MON_YEAR,strtotime($datemonthfirst));                                                                        # i18n
$summary        = sprintf(FMT_SUMMARY, $monthYear);                                                                                                                # i18n

// derive last day of month
$lastmday = $daysInMonth[$month - 1];
if (2 == $month)                                                                                                        # correct for leap year if necessary
{
		if (1 == date('L',strtotime(sprintf('%4d-%02d-%02d',$year,1,1)))) $lastmday++;
}

// derive "today" to detect when to mark this up in the calendar face
$today = date("Y:m:d",mktime());

// build navigation variables - locale-specific (%B gets full month name)
// FIXME: @@@ take care we don't go over date limits for PHP
if (!$hasActionParams)
{
		// previous month
		$monthPrev        = ($month-1 < 1) ? 12 : $month-1;
		$yearPrev        = ($month-1 < 1) ? $year-1 : $year;
		$parPrev        = "month=$monthPrev&amp;year=$yearPrev";
		$urlPrev        = $this->Href('', '', $parPrev);
		$titlePrev        = strftime(LOC_MON_YEAR,strtotime(sprintf('%4d-%02d-%02d',$yearPrev,$monthPrev,1)));# i18n
		// current month
		$parCur                = 'month='.CUR_MONTH.'&amp;year='.CUR_YEAR;
		$urlCur                = $this->Href('', '', $parCur);
		$titleCur        = strftime(LOC_MON_YEAR,strtotime(sprintf('%4d-%02d-%02d',CUR_YEAR,CUR_MONTH,1)));        # i18n
		// next month
		$monthNext        = ($month+1 > 12) ? 1 : $month+1;
		$yearNext        = ($month+1 > 12) ? $year+1 : $year;
		$parNext        = "month=$monthNext&amp;year=$yearNext";
		$urlNext        = $this->Href('', '', $parNext);
		$titleNext        = strftime(LOC_MON_YEAR,strtotime(sprintf('%4d-%02d-%02d',$yearNext,$monthNext,1)));# i18n
}

// build array with names of weekdays (locale-specific)
$tmpTime        = strtotime("this Sunday");                        # get a starting date that is a Sunday
$tmpDate        = date('d',$tmpTime);
$tmpMonth        = date('m',$tmpTime);
$tmpYear        = date('Y',$tmpTime);
for ($i=0; $i<=6; $i++)
{
		$aWeekdaysShort[$i]        = strftime('%a',mktime(0,0,0,$tmpMonth,$tmpDate+$i,$tmpYear));
		$aWeekdaysLong[$i]        = strftime('%A',mktime(0,0,0,$tmpMonth,$tmpDate+$i,$tmpYear));
}
// ***** END DERIVED VARIABLES *****

// ***** OUTPUT SECTION *****
?>

<table cellpadding="2" cellspacing="1" class="calendar" summary="<?php echo $summary;?>">
<caption><?php echo $monthYear;?></caption>
<thead>
		<tr>
<?php
for ($i=0; $i<=6; $i++)
{
?>
				<th scope="col" width="26" abbr="<?php echo $aWeekdaysLong[$i];?>"><?php echo $aWeekdaysShort[$i];?></th>
<?php
}
?>
		</tr>
</thead>
<tbody class="face">
<?php
		// start row for first week (if it doesn't start on Sunday)
		if ($firstwday > 0)
		{
				echo "        <tr>\n";
		}
		// fill start of first week with blank cells before start of month
		for ($i=1; $i<=$firstwday; $i++)
		{
				echo '                <td>&nbsp;</td>'."\n";
		}

		// loop through all the days of the month
		$day = 1;
		$wday = $firstwday;
		while ($day <= $lastmday)
		{
				// start week row
				if ($wday == 0)
				{
						echo "        <tr>\n";
				}
				// handle markup for current day or any other day
				$calday = sprintf('%4d:%02d:%02d',$year,$month,$day);
				$pagename = sprintf('%s%4d%02d%02d', $calendarname,$year,$month,$day);
				if ($this->ExistsPage($pagename))
				{
						$pagename = BASE_URL.$pagename;
						$dayclass = '"created"';
				}
				else
				{
						$pagename = sprintf('%s%s/edit', BASE_URL,$pagename);
						$dayclass = '"new"';
				}	
				if ($calday == $today)
				{
						echo '                <td title="'.TODAY.'" class="currentday">'.'<a href="'.$pagename.'" class='.$dayclass.'>'.$day."</a></td>\n";
				}
				else
				{
						echo '                <td>'.'<a href="'.$pagename.'" class='.$dayclass.'>'.$day."</a></td>\n";
				}
				// end week row
				if ($wday == 6)
				{
						echo "        </tr>\n";
				}
				// next day
				$wday = ++$wday % 7;
				$day++;

		}

		// fill week with blank cells after end of month
		if ($wday > 0)
		{
				for ($i=$wday; $i<=6; $i++)
				{
						echo '                <td>&nbsp;</td>'."\n";
				}
		}
		// end row for last week
		if ($wday < 6)
		{
				echo "        </tr>\n";
		}
?>
</tbody>
<?php
// generate navigation only for calendar without (valid) action parameters!
// FIXME: @@@ take care we don't go over date limits for PHP
if ($hasActionParams === FALSE)
{
?>
<tbody class="calnav">
		<tr>
				<td colspan="3" align="left" class="prevmonth"><a href="<?php echo $urlPrev;?>" title="<?php echo $titlePrev;?>">&lt;&lt;</a></td>
				<td align="center" class="curmonth"><a href="<?php echo $urlCur;?>" title="<?php echo $titleCur;?>">=</a></td>
				<td colspan="3" align="right" class="nextmonth"><a href="<?php echo $urlNext;?>" title="<?php echo $titleNext;?>">&gt;&gt;</a></td>
		</tr>
</tbody>
<?php
}
?>
</table>
<?php
// ***** END OUTPUT SECTION *****
?>
%%
----
CategoryUserContributions