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<?php
/**
* @package Horde
*/
class Horde_Block_Moon extends Horde_Core_Block
{
/**
*/
public function __construct($app, $params = array())
{
parent::__construct($app, $params);
$this->_name = _("Moon Phases");
}
/**
*/
protected function _params()
{
return array(
'phase' => array(
'name' => _("Which phases"),
'type' => 'enum',
'default' => 'current',
'values' => array('current' => _("Current 4 Phases"),
'next' => _("Next 4 Phases"))),
'hemisphere' => array(
'name' => _("Hemisphere"),
'type' => 'enum',
'default' => 'northern',
'values' => array('northern' => _("Northern Hemisphere"),
'southern' => _("Southern Hemisphere"))),
);
}
/**
*/
protected function _content()
{
$phases = $this->_calculateMoonPhases(date('Y'));
$now = time();
$lastNew = 0;
$lastNewStamp = 0;
$offset = 0;
foreach ($phases as $key => $val) {
if ($key < $now && $key > $lastNewStamp && $val == _("New Moon")) {
$lastNew = $offset;
$lastNewStamp = $key;
}
$offset++;
}
$dates = (isset($this->_params['phase']) && ($this->_params['phase'] == 'next'))
? array_slice(array_keys($phases), $lastNew + 4, 4)
: array_slice(array_keys($phases), $lastNew, 4);
$location = (isset($this->_params['hemisphere']) && ($this->_params['hemisphere'] == 'northern'))
? _("Northern Hemisphere")
: _("Southern Hemisphere");
$html = '<table width="100%" height="100%" cellspacing="0">' .
'<tr><td colspan="4" class="control"><strong>' . $location . '</strong></td></tr>' .
'<tr height="100%"><td width="25%" align="center">' .
Horde_Themes_Image::tag('block/moon/newmoon.png', array('alt' => _("New Moon"))) .
'<br />' . strftime($GLOBALS['prefs']->getValue('date_format_mini'), $dates[0]) .
'</td>';
$html .= '<td width="25%" align="center">';
if (isset($this->_params['hemisphere']) &&
($this->_params['hemisphere'] == 'northern')) {
$html .= Horde_Themes_Image::tag('block/moon/lastquarter.png', array('alt' => _("First Quarter")));
} else {
$html .= Horde_Themes_Image::tag('block/moon/firstquarter.png', array('alt' => _("First Quarter")));
}
$html .= '<br />' . strftime($GLOBALS['prefs']->getValue('date_format_mini'), $dates[1]) . '</td>';
$html .= '<td width="25%" align="center">' .
Horde_Themes_Image::tag('block/moon/fullmoon.png', array('alt' => _("Full Moon"))) .
'<br />' . strftime($GLOBALS['prefs']->getValue('date_format_mini'), $dates[2]) . '</td>';
$html .= '<td width="25%" align="center">';
if (isset($this->_params['hemisphere']) &&
($this->_params['hemisphere'] == 'northern')) {
$html .= Horde_Themes_Image::tag('block/moon/firstquarter.png', array('alt' => _("Last Quarter")));
} else {
$html .= Horde_Themes_Image::tag('block/moon/lastquarter.png', array('alt' => _("Last Quarter")));
}
$html .= '<br />' . strftime($GLOBALS['prefs']->getValue('date_format_mini'), $dates[3]) . '</td></tr></table>';
return $html;
}
/**
* Returns an array with all the phases of the moon for a whole
* year.
*
* Based on code from
* http://www.zend.com/codex.php?id=830&single=1 by Are Pedersen.
*
* Converted from Basic by Roger W. Sinnot, Sky & Telescope, March 1985.
* Converted from javascript by Are Pedersen 2002
* Javascript found at http://www.stellafane.com/moon_phase/moon_phase.htm
*
* @param integer $year The four digit year to return the moon phases
* for.
*
* @return array The moon phases.
*/
private function _calculateMoonPhases($Y)
{
$R1 = 3.14159265 / 180;
$U = false;
$K0 = intval(($Y - 1900) * 12.3685);
$T = ($Y - 1899.5) / 100;
$T2 = $T * $T;
$T3 = $T * $T * $T;
$J0 = 2415020 + 29 * $K0;
$F0 = 0.0001178 * $T2 - 0.000000155 * $T3;
$F0 += (0.75933 + 0.53058868*$K0);
$F0 -= (0.000837 * $T + 0.000335 * $T2);
$M0 = $K0 * 0.08084821133;
$M0 = 360 * ($M0 - intval($M0)) + 359.2242;
$M0 -= 0.0000333 * $T2;
$M0 -= 0.00000347 * $T3;
$M1 = $K0 * 0.07171366128;
$M1 = 360 * ($M1 - intval($M1)) + 306.0253;
$M1 += 0.0107306 * $T2;
$M1 += 0.00001236 * $T3;
$B1 = $K0 * 0.08519585128;
$B1 = 360 * ($B1 - intval($B1)) + 21.2964;
$B1 -= 0.0016528 * $T2;
$B1 -= 0.00000239 * $T3;
for ($K9 = 0; $K9 <= 28; $K9 = $K9 + 0.5) {
$J = $J0 + 14 * $K9;
$F = $F0 + 0.765294 * $K9;
$K = $K9 / 2;
$M5 = ($M0 + $K * 29.10535608) * $R1;
$M6 = ($M1 + $K * 385.81691806) * $R1;
$B6 = ($B1 + $K * 390.67050646) * $R1;
$F -= 0.4068 * sin($M6);
$F += (0.1734 - 0.000393 * $T) * sin($M5);
$F += 0.0161 * sin(2 * $M6);
$F += 0.0104 * sin(2 * $B6);
$F -= 0.0074 * sin($M5 - $M6);
$F -= 0.0051 * sin($M5 + $M6);
$F += 0.0021 * sin(2 * $M5);
$F += 0.0010 * sin(2 * $B6 - $M6);
/* Add 1/2 minute for proper rounding to minutes per Sky &
* Tel article. */
$F += 0.5 / 1440;
$J += intval($F);
$F -= intval($F);
/* Convert from JD to Calendar Date. */
$julian = $J + round($F);
$parts = explode('/', $this->_jdtogregorian($julian));
$stamp = gmmktime(0, 0, 0, $parts[0], $parts[1], $parts[2]);
/* half K. */
if (($K9 - floor($K9)) > 0) {
if ($U) {
/* New half. */
$phases[$stamp] = _("First Half");
} else {
/* Full half. */
$phases[$stamp] = _("Last Half");
}
} else {
/* full K. */
if (!$U) {
$phases[$stamp] = _("New Moon");
} else {
$phases[$stamp] = _("Full Moon");
}
$U = !$U;
}
}
return $phases;
}
/**
* Checks if the jdtogregorian function exists, and if not calculates the
* gregorian date manually.
*
* @param int $julian The julian date.
*
* @return string m/d/Y
*/
private function _jdtogregorian($julian)
{
if (function_exists('jdtogregorian')) {
return jdtogregorian($julian);
}
// From http://php.net/manual/en/function.jdtogregorian.php
$julian = $julian - 1721119;
$calc1 = 4 * $julian - 1;
$year = floor($calc1 / 146097);
$julian = floor($calc1 - 146097 * $year);
$day = floor($julian / 4);
$calc2 = 4 * $day + 3;
$julian = floor($calc2 / 1461);
$day = $calc2 - 1461 * $julian;
$day = floor(($day + 4) / 4);
$calc3 = 5 * $day - 3;
$month = floor($calc3 / 153);
$day = $calc3 - 153 * $month;
$day = floor(($day + 5) / 5);
$year = 100 * $year + $julian;
if ($month < 10) {
$month = $month + 3;
} else {
$month = $month - 9;
$year = $year + 1;
}
return "$month/$day/$year";
}
}
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