<?php
/**
 * Populate form element's values with entity list
 *
 * @author gERD Schaufelberger <gerd@schaufelberger.de>
 * @package WB
 */

// WBClass::load();

/**
 * Populate form element's values with entity list
 *
 * Use table data to populate values
 *
 * @version 0.3.0
 * @package WB
 */
class WBDatasource_Calendar extends WBStdClass
{
    /**
     * @var DateTime
     */
    private $date;

    /**
     * Basic Time String
     * @var string
     */
    private $baseTimeString;

    /**
     * @var array of WBDatasource_Calendar_Decorator
     */
    private $decorator  =   array();

    /**
     * Constructor
     *
     * @param array
     */
    public function __construct($params = array())
    {
        $params =   array_merge(array(
                'date'  =>  'now'
            ), $params);

        $this->setBaseDate($params['date']);
    }

    /**
     * Set Date
     *
     * @param string timestring, like 'now'
     */
    public function setBaseDate($date = 'now')
    {
        $this->baseTimeString   =   $date;
        $this->date =   new DateTime($date);
    }

    /**
     * Attach Decorator
     *
     * @param WBDatasource_Calendar_Decorator
     */
    public function attach($dec)
    {
        $this->decorator[]  =   $dec;
    }

    /**
     * Add Date Interval
     *
     * @see sub()
     * @param string date Interval
     */
    public function add($di, $offset = false)
    {
        if (!$offset) {
            $this->date =   new DateTime($this->baseTimeString);
        }
        $this->date->add(new DateInterval($di));
    }

    /**
     * Substract Date Interval
     *
     * @param string date Interval
     */
    public function sub($di, $offset = false)
    {
        if (!$offset) {
            $this->date =   new DateTime($this->baseTimeString);
        }
        $this->date->sub(new DateInterval($di));
    }

    /**
     * Get Days 4 Month
     *
     * Return number of days, but also fill list array with days.
     *
     * @param array list for days
     * @return int number of days in month
     */
    public function getDays4Month(&$list = null)
    {
        $month  =   array(
                    'year'  =>  $this->date->format('Y'),
                    'month' =>  $this->date->format('m')
                );

        $date   =   new DateTime();
        $date->setDate($month['year'], $month['month'], 1);
        $days   =   $date->format('t');

        if (!is_array($list)) {
            return $days;
        }

        $week   =   array(
                        'month_name'    =>  $date->format('F'),
                        'month_short'   =>  $date->format('M'),
                        'month'         =>  $month['month'],
                        'year'          =>  $month['year'],
                        'week_no'       =>  $date->format('W'),
                        'day1'          =>  '',
                        'day2'          =>  '',
                        'day3'          =>  '',
                        'day4'          =>  '',
                        'day5'          =>  '',
                        'day6'          =>  '',
                        'day7'          =>  ''
                    );
        for ($i = 1; $i <= $days; ++$i) {
            if ($date->format('W') != $week['week_no']) {
                $this->injectInfo4Week($date, $week);
                $list[] =   $week;
                $week   =   array(
                            'month_name'    =>  $date->format('F'),
                            'month_short'   =>  $date->format('M'),
                            'month'         =>  $month['month'],
                            'year'          =>  $month['year'],
                            'week_no'       =>  $date->format('W'),
                            'day1'          =>  '',
                            'day2'          =>  '',
                            'day3'          =>  '',
                            'day4'          =>  '',
                            'day5'          =>  '',
                            'day6'          =>  '',
                            'day7'          =>  ''
                            );
            }

            $this->injectInfo4Day($date, $week);
            $date->add(new DateInterval('P1D'));

        }

        if (empty($week['day1'])) {
            return $days;
        }

        $this->injectInfo4Week($date, $week);
        $list[] =   $week;
        return $days;
    }

    /**
     * Inject Information for Each Day
     *
     * @param DateTime
     * @param array week data
     */
    private function injectInfo4Day($date, &$week)
    {
        $dow    =   $date->format('N');
        $week['day' . $dow]                     =   $date->format('j');
        $week['day' . $dow . '_class']          =   array();
        $week['day' . $dow . '_title']          =   array();
        $week['day' . $dow . '_iso']            =   $date->format('Y-m-d');
        $week['day' . $dow . '_unix']           =   $date->format('U');
        $week['day' . $dow . '_weekday_no']     =   $date->format('N');
        $week['day' . $dow . '_weekday']        =   $date->format('l');
        $week['day' . $dow . '_weekday_short']  =   $date->format('D');

        // use modules
        foreach ($this->decorator as $dec) {
            /** @var WBDatasource_Calendar_Decorator */
            $dec->decorateDay($date, $week, $dow);
        }

        $week['day' . $dow . '_class']  =   implode(' ', $week['day' . $dow . '_class']);
        $week['day' . $dow . '_title']  =   implode(' ', $week['day' . $dow . '_title']);
        return;
    }


    /**
     * Inject Information for Each Week
     *
     * @param DateTime
     * @param array week data
     */
    private function injectInfo4Week($date, &$week)
    {
        foreach ($this->decorator as $dec) {
            /** @var WBDatasource_Calendar_Decorator */
            $dec->decorateWeek($date, $week);
        }

        // use modules
    }
}