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<?php

/* vim: set expandtab tabstop=4 shiftwidth=4: */

//

// +----------------------------------------------------------------------+

// | PHP Version 4                                                        |

// +----------------------------------------------------------------------+

// | Copyright (c) 1997-2002 The PHP Group                                |

// +----------------------------------------------------------------------+

// | This source file is subject to version 2.02 of the PHP license,      |

// | that is bundled with this package in the file LICENSE, and is        |

// | available at through the world-wide-web at                           |

// | http://www.php.net/license/3_0.txt.                                  |

// | If you did not receive a copy of the PHP license and are unable to   |

// | obtain it through the world-wide-web, please send a note to          |

// | license@php.net so we can mail you a copy immediately.               |

// +----------------------------------------------------------------------+

// | Authors: Harry Fuecks <hfuecks@phppatterns.com>                      |

// +----------------------------------------------------------------------+

//

// $Id: Weekdays.php,v 1.1 2005-09-30 14:58:00 ddelon Exp $

//

/**

 * @package Calendar

 * @version $Id: Weekdays.php,v 1.1 2005-09-30 14:58:00 ddelon Exp $

 */

/**

 * Allows Calendar include path to be redefined

 * @ignore

 */

if (!defined('CALENDAR_ROOT')) {

    define('CALENDAR_ROOT', 'Calendar'.DIRECTORY_SEPARATOR);

}

/**

 * Load Calendar base class

 */

require_once CALENDAR_ROOT.'Calendar.php';

/**

 * Load base month

 */

require_once CALENDAR_ROOT.'Month.php';

/**

 * Represents a Month and builds Days in tabular form<br>

 * <code>

 * require_once 'Calendar'.DIRECTORY_SEPARATOR.'Month'.DIRECTORY_SEPARATOR.'Weekdays.php';

 * $Month = & new Calendar_Month_Weekdays(2003, 10); // Oct 2003

 * $Month->build(); // Build Calendar_Day objects

 * while ($Day = & $Month->fetch()) {

 *     if ($Day->isFirst()) {

 *         echo '<tr>';

 *     }

 *     if ($Day->isEmpty()) {

 *         echo '<td>&nbsp;</td>';

 *     } else {

 *         echo '<td>'.$Day->thisDay().'</td>';

 *     }

 *     if ($Day->isLast()) {

 *         echo '</tr>';

 *     }

 * }

 * </code>

 * @package Calendar

 * @access public

 */

class Calendar_Month_Weekdays extends Calendar_Month

{

    /**

     * Instance of Calendar_Table_Helper

     * @var Calendar_Table_Helper

     * @access private

     */

    var $tableHelper;

    /**

     * First day of the week

     * @access private

     * @var string

     */

    var $firstDay;

    /**

     * Constructs Calendar_Month_Weekdays

     * @param int year e.g. 2003

     * @param int month e.g. 5

     * @param int (optional) first day of week (e.g. 0 for Sunday, 2 for Tuesday etc.)

     * @access public

     */

    function Calendar_Month_Weekdays($y, $m, $firstDay=false)

    {

        Calendar_Month::Calendar_Month($y, $m);

        $this->firstDay = $firstDay;

    }

    /**

     * Builds Day objects in tabular form, to allow display of calendar month

     * with empty cells if the first day of the week does not fall on the first

     * day of the month.

     * @see Calendar_Day::isEmpty()

     * @see Calendar_Day_Base::isFirst()

     * @see Calendar_Day_Base::isLast()

     * @param array (optional) Calendar_Day objects representing selected dates

     * @return boolean

     * @access public

     */

    function build($sDates=array())

    {

        require_once CALENDAR_ROOT.'Table'.DIRECTORY_SEPARATOR.'Helper.php';

        $this->tableHelper = & new Calendar_Table_Helper($this, $this->firstDay);

        Calendar_Month::build($sDates);

        $this->buildEmptyDaysBefore();

        $this->shiftDays();

        $this->buildEmptyDaysAfter();

        $this->setWeekMarkers();

        return true;

    }

    /**

     * Prepends empty days before the real days in the month

     * @return void

     * @access private

     */

    function buildEmptyDaysBefore()

    {

        $eBefore = $this->tableHelper->getEmptyDaysBefore();

        for ($i=0; $i < $eBefore; $i++) {

            $stamp = $this->cE->dateToStamp($this->year, $this->month, -$i);

            $Day = new Calendar_Day(

                                $this->cE->stampToYear($stamp),

                                $this->cE->stampToMonth($stamp),

                                $this->cE->stampToDay($stamp));

            $Day->setEmpty();

            array_unshift($this->children, $Day);

        }

    }

    /**

     * Shifts the array of children forward, if necessary

     * @return void

     * @access private

     */

    function shiftDays()

    {

        if (isset ($this->children[0])) {

            array_unshift($this->children, null);

            unset($this->children[0]);

        }

    }

    /**

     * Appends empty days after the real days in the month

     * @return void

     * @access private

     */

    function buildEmptyDaysAfter()

    {

        $eAfter = $this->tableHelper->getEmptyDaysAfter();

        $sDOM = $this->tableHelper->getNumTableDaysInMonth();

        for ($i = 1; $i <= $sDOM-$eAfter; $i++) {

            $Day = new Calendar_Day($this->year, $this->month+1, $i);

            $Day->setEmpty();

            array_push($this->children, $Day);

        }

    }

    /**

     * Sets the "markers" for the beginning and of a of week, in the

     * built Calendar_Day children

     * @return void

     * @access private

     */

    function setWeekMarkers()

    {

        $dIW  = $this->cE->getDaysInWeek(

            $this->thisYear(),

            $this->thisMonth(),

            $this->thisDay()

        );

        $sDOM = $this->tableHelper->getNumTableDaysInMonth();

        for ($i=1; $i <= $sDOM; $i+= $dIW) {

            $this->children[$i]->setFirst();

            $this->children[$i+($dIW-1)]->setLast();

        }

    }

}

?>