<?php
/**
 * DateWidget.class.php
 *
 * This file contains the definition of the DateWidget class.
 *
 * @package SolidWorks
 * @author John Diamond <hide@address.com>
 * @copyright John Diamond <hide@address.com>
 * @license http://www.opensource.org/licenses/gpl-license.php GNU Public License
 */

/**
 * DateWidget
 *
 * @package SolidWorks
 * @author John Diamond <hide@address.com>
 */
class DateWidget extends TextWidget {
	/**
	 * @var boolean This flag indicates wether the javascript for the calendar link has been included or not
	 */
	public static $jsFlag = false;

	/**
	 * @var string Date input format: MDY or DMY
	 */
	private $format = "MDY";

	/**
	 * Date Widget Constructor
	 *
	 * @param Page $page Page object
	 * @param string $format Date input format: MDY or DMY
	 */
	public function __construct( $formName, $fieldName, $fieldConfig, $format = "MDY" ) {
		parent::__construct( $formName, $fieldName, $fieldConfig );
		$this->setFormat( $format );
	}

	/**
	 * Determine Widget Value
	 *
	 * Determines the correct source to use for the value of this widget and
	 * format that value as such: MM-DD-YYYY or DD-MM-YYYY
	 * The order goes like this:
	 *   5. No value
	 *   4. The default value set in the config file
	 *   3. The value given by the 'value' parameter of the {form_field} tag
	 *   2. The value of this field in the specified DBO
	 *   1. The value as entered by the user
	 *
	 * @param array $params Paramets passed from the template
	 * @throws SWException
	 * @return string The value to use
	 */
	protected function determineValue( $params ) {
		$value = parent::determineValue( $params );
		if ( is_string( $value ) ) {
			$tsValue = strlen( $value ) > 10 ?
					DBConnection::datetime_to_unix( $value ) :
					DBConnection::date_to_unix( $value );
		}
		else {
			$tsValue = $value;
		}

		return $this->TS2Date( $tsValue == null ? time() : $tsValue );
	}

	/**
	 * Format a Date String from a Time Stamp
	 *
	 * Takes a unix timestamp value and format it as MM-DD-YYYY or DD-MM-YYYY
	 *
	 * @param integer $ts Time stamp
	 * @return string Date string
	 */
	function TS2Date( $ts ) {
		$date = getdate( $ts );
		return $this->getFormat() == "MDY" ?
				sprintf( "%d/%d/%d", $date['mon'], $date['mday'], $date['year'] ) :
				sprintf( "%d/%d/%d", $date['mday'], $date['mon'], $date['year'] );
	}

	/**
	 * Get Date Input Format
	 *
	 * @return string Date input format: MDY or DMY
	 */
	public function getFormat() {
		return $this->format;
	}

	/**
	 * Get Widget HTML
	 *
	 * Returns HTML code for this widget
	 *
	 * @param array $params Parameters passed from the template
	 * @return string HTML code for this widget
	 */
	public function getHTML( $params ) {
		// Get widget value if available
		$myParams['value'] = $this->determineValue( $params );

		// If this is the first calendar widget, add code to include the javascript
		// for the calendar window
		if ( !self::$jsFlag ) {
			$js = "\n<script language=\"Javascript\" src=\"../solidworks/widgets/popupcalendar/calendar.js\"></script>\n";
			self::$jsFlag = true;
		}
		else {
			$js = null;
		}

		// Create HTML for the calendar pop-up link
		$calHTML =
				sprintf( "<a href=\"#\" onclick=\"return getCalendar(document.%s.%s);\">",
				$this->formName,
				$this->fieldName ) .
				"<img src=\"../solidworks/widgets/popupcalendar/calendar.png\" border=\"0\" />" .
				"</a>";

		// Generate HTML for a text box control
		$myParams['type'] = "text";
		$myParams['size'] = 10;
		return $js . "<input " . $this->buildParams( $params, $myParams ) . "/> " . $calHTML;
	}

	/**
	 * Set Date Input Format
	 *
	 * @param string $format Date input format: MDY or DMY
	 * @throws InvalidDateInputFormat
	 */
	public function setFormat( $format ) {
		if ( !($format == "MDY" || $format == "DMY") ) {
			throw new InvalidDateInputFormatException( $format );
		}

		$this->format = $format;
	}
}
?>