/usr/share/php/Horde/Service/Weather/Parser/Metar.php is in php-horde-service-weather 2.5.4-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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/**
* Copyright 2016-2017 Horde LLC (http://www.horde.org/)
*
* @author Michael J Rubinsky <mrubinsk@horde.org>
* @license http://www.horde.org/licenses/bsd BSD
* @category Horde
* @package Service_Weather
*/
/**
* Horde_Service_Weather_Parser_Metar
*
* Responsible for parsing encoded METAR data.
*
* Parsing code adapted from PEAR's Services_Weather_Metar class. Original
* phpdoc attributes as follows:
* @author Alexander Wirtz <alex@pc4p.net>
* @copyright 2005-2011 Alexander Wirtz
* @link http://pear.php.net/package/Services_Weather
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*
* @author Michael J Rubinsky <mrubinsk@horde.org>
* @category Horde
* @package Service_Weather
*/
class Horde_Service_Weather_Parser_Metar extends Horde_Service_Weather_Parser_Base
{
/**
* Map of hours descriptors.
*
* @var array
*/
protected $_hours = array(
'P' => '1',
'6' => '3/6',
'7' => '24'
);
/**
* Parses METAR
*
* @param array $data An array of METAR data lines.
*
* @return array An array of weather data. Possible keys include:
* - station:
* - dataRaw:
* - update:
* - updateRaw:
* - wind:
* - windDegrees:
* - windDirection:
* - windGust:
* - windVariability:
* - visibility:
* - visQualifier:
* - clouds:
* - amount
* - height
* - type
* - temperature
* - dewpoint
* - humidity
* - felttemperature
* - pressure
* - trend
* - type
* - from
* - to
* - at
* - remark
* - autostation
* - seapressure
* - presschg
* - snowdepth
* - snowequiv
* - cloudtypes
* - sunduration
* - 1hrtemp
* - 1hrdew
* - 6hmaxtemp
* - 6hmintemp
* - 24hmaxtemp
* - 24hmintemp
* - 3hpresstrend
* - nospeci
* - sensors
* - maintain
* - precipitation
* - amount
* - hours
*/
protected function _parse(array $data)
{
// Eliminate trailing information
for ($i = 0; $i < sizeof($data); $i++) {
if (strpos($data[$i], '=') !== false) {
$data[$i] = substr($data[$i], 0, strpos($data[$i], '='));
$data = array_slice($data, 0, $i + 1);
break;
}
}
// Start with parsing the first line for the last update
$weatherData = array();
$weatherData['station'] = '';
$weatherData['dataRaw'] = implode(' ', $data);
$weatherData['update'] = strtotime(trim($data[0]) . ' GMT');
$weatherData['updateRaw'] = trim($data[0]);
if (empty($weatherData['update'])) {
throw new Horde_Service_Weather_Exception('Unable to parse data.');
}
// and prepare the rest for stepping through
array_shift($data);
$metar = explode(' ', preg_replace('/\s{2,}/', ' ', implode(' ', $data)));
// Trend handling
$trendCount = 0;
// Pointer to the array we add the data to. Needed for handling trends.
$pointer = &$weatherData;
// Load the metar codes for this go around.
$metarCode = $this->_getMetarCodes();
for ($i = 0; $i < sizeof($metar); $i++) {
$metar[$i] = trim($metar[$i]);
if (!strlen($metar[$i])) {
continue;
}
$result = array();
$resultVF = array();
$lresult = array();
$found = false;
foreach ($metarCode as $key => $regexp) {
// Check if current code matches current metar snippet
if (($found = preg_match('/^' . $regexp . '$/i', $metar[$i], $result)) == true) {
switch ($key) {
case 'station':
$pointer['station'] = $result[0];
unset($metarCode['station']);
break;
case 'wind':
$pointer['wind'] = round(Horde_Service_Weather::convertSpeed(
$result[2],
$result[5],
$this->_unitMap[self::UNIT_KEY_SPEED]
));
$wind_mph = Horde_Service_Weather::convertSpeed(
$result[2],
$result[5],
'mph',
$this->_unitMap[self::UNIT_KEY_SPEED]
);
if ($result[1] == 'VAR' || $result[1] == 'VRB') {
// Variable winds
$pointer['windDegrees'] = round(Horde_Service_Weather_Translation::t('Variable'));
$pointer['windDirection'] = Horde_Service_Weather_Translation::t('Variable');
} else {
// Save wind degree and calc direction
$pointer['windDegrees'] = intval($result[1]);
$pointer['windDirection'] = Horde_Service_Weather::degToDirection($result[1]);
}
if (is_numeric($result[4])) {
// Wind with gusts...
$pointer['windGust'] = round(Horde_Service_Weather::convertSpeed(
$result[4],
$result[5],
$this->_unitMap[self::UNIT_KEY_SPEED]
));
}
break;
case 'windVar':
// Once more wind, now variability around the current wind-direction
$pointer['windVariability'] = array(
'from' => intval($result[1]),
'to' => intval($result[2])
);
break;
case 'visFrac':
// Possible fractional visibility here. Check if it matches with the next METAR piece for visibility
if (!isset($metar[$i + 1]) ||
!preg_match('/^' . $metarCode['visibility'] . '$/i', $result[1] . ' ' . $metar[$i + 1], $resultVF)) {
// No next METAR piece available or not matching.
$found = false;
break;
} else {
// Match. Hand over result and advance METAR
$key = 'visibility';
$result = $resultVF;
$i++;
}
case 'visibility':
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('AT');
if (is_numeric($result[1]) && ($result[1] == 9999)) {
// Upper limit of visibility range is 10KM.
$visibility = Horde_Service_Weather::convertDistance(
10,
'km',
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('BEYOND');
} elseif (is_numeric($result[1])) {
// 4-digit visibility in m
$visibility = Horde_Service_Weather::convertDistance(
$result[1],
'm',
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
} elseif (!isset($result[11]) || $result[11] != 'CAVOK') {
if ($result[3] == 'M') {
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('BELOW');
} elseif ($result[3] == 'P') {
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('BEYOND');
}
if (is_numeric($result[5])) {
// visibility as one/two-digit number
$visibility = Horde_Service_Weather::convertDistance(
$result[5],
$result[10],
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
} else {
// the y/z part, add if we had a x part (see visibility1)
if (is_numeric($result[7])) {
$visibility = Horde_Service_Weather::convertDistance(
$result[7] + $result[8] / $result[9],
$result[10],
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
} else {
$visibility = Horde_Service_Weather::convertDistance(
$result[8] / $result[9],
$result[10],
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
}
}
} else {
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('BEYOND');
$visibility = Horde_Service_Weather::convertDistance(
10,
'km',
$this->_unitMap[self::UNIT_KEY_DISTANCE]
);
$pointer['clouds'] = array(array(
'amount' => Horde_Service_Weather_Translation::t('Clear below'),
'height' => 5000)
);
$pointer['condition'] = Horde_Service_Weather_Translation::t('no significant weather');
}
$pointer['visibility'] = $visibility;
break;
case 'condition':
if (!isset($pointer['condition'])) {
$pointer['condition'] = '';
} elseif (strlen($pointer['condition']) > 0) {
$pointer['condition'] .= ',';
}
if (in_array(strtolower($result[0]), $this->_conditions)) {
// First try matching the complete string
$pointer['condition'] .= ' ' . $this->_conditions[strtolower($result[0])];
} else {
// No luck, match part by part
array_shift($result);
$result = array_unique($result);
foreach ($result as $condition) {
if (strlen($condition) > 0) {
$pointer['condition'] .= ' ' . $this->_conditions[strtolower($condition)];
}
}
}
$pointer['condition'] = trim($pointer['condition']);
break;
case 'clouds':
if (!isset($pointer['clouds'])) {
$pointer['clouds'] = array();
}
if (sizeof($result) == 5) {
// Only amount and height
$cloud = array('amount' => $this->_clouds[strtolower($result[3])]);
if ($result[4] == '///') {
$cloud['height'] = Horde_Service_Weather_Translation::t('station level or below');
} else {
$cloud['height'] = $result[4] * 100;
}
} elseif (sizeof($result) == 6) {
// Amount, height and type
$cloud = array(
'amount' => $this->_clouds[strtolower($result[3])],
'type' => $this->_clouds[strtolower($result[5])]
);
if ($result[4] == '///') {
$cloud['height'] = Horde_Service_Weather_Translation::t('station level or below');
} else {
$cloud['height'] = $result[4] * 100;
}
} else {
// SKC or CLR or NSC
$cloud = array('amount' => $this->_clouds[strtolower($result[0])]);
}
$pointer['clouds'][] = $cloud;
break;
case 'temperature':
// normal temperature in first part
// negative value
if ($result[1] == 'M') {
$result[2] *= -1;
}
$pointer['temperature'] = round(Horde_Service_Weather::convertTemperature(
$result[2],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
));
$temp_f = Horde_Service_Weather::convertTemperature($result[2], 'c', 'f');
if (sizeof($result) > 4) {
// same for dewpoint
if ($result[4] == 'M') {
$result[5] *= -1;
}
$pointer['dewPoint'] = round(Horde_Service_Weather::convertTemperature(
$result[5],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
));
$pointer['humidity'] = round(Horde_Service_Weather::calculateHumidity($result[2], $result[5])) . '%';
}
if (isset($pointer['wind'])) {
// Now calculate windchill from temperature and windspeed
// Note these must be in F and MPH.
$pointer['feltTemperature'] = round(Horde_Service_Weather::convertTemperature(
Horde_Service_Weather::calculateWindChill($temp_f, $wind_mph),
'f',
$this->_unitMap[self::UNIT_KEY_TEMP]
));
}
break;
case 'pressure':
if ($result[1] == 'A') {
// Pressure provided in inches
$pointer['pressure'] = round(Horde_Service_Weather::convertPressure(
$result[2] / 100,
'in',
$this->_unitMap[self::UNIT_KEY_PRESSURE]
), 2);
} elseif ($result[3] == 'Q') {
// ... in hectopascal
$pointer['pressure'] = round(Horde_Service_Weather::convertPressure(
$result[4],
'hpa',
$this->_unitMap[self::UNIT_KEY_PRESSURE]
), 2);
}
break;
case 'trend':
// We may have a trend here... extract type and set pointer on
// created new array
if (!isset($weatherData['trend'])) {
$weatherData['trend'] = array();
$weatherData['trend'][$trendCount] = array();
}
$pointer = &$weatherData['trend'][$trendCount];
$trendCount++;
$pointer['type'] = $result[0];
while (isset($metar[$i + 1]) && preg_match('/^(FM|TL|AT)(\d{2})(\d{2})$/i', $metar[$i + 1], $lresult)) {
if ($lresult[1] == 'FM') {
$pointer['from'] = $lresult[2] . ':' . $lresult[3];
} elseif ($lresult[1] == 'TL') {
$pointer['to'] = $lresult[2] . ':' . $lresult[3];
} else {
$pointer['at'] = $lresult[2] . ':' . $lresult[3];
}
// As we have just extracted the time for this trend
// from our METAR, increase field-counter
$i++;
}
break;
case 'remark':
// Remark part begins
$metarCode = $this->_getRemarks();
$weatherData['remark'] = array();
break;
case 'autostation':
// Which autostation do we have here?
if ($result[1] == 0) {
$weatherData['remark']['autostation'] = Horde_Service_Weather_Translation::t('Automatic weatherstation w/o precipitation discriminator');
} else {
$weatherData['remark']['autostation'] = Horde_Service_Weather_Translation::t('Automatic weatherstation w/ precipitation discriminator');
}
unset($metarCode['autostation']);
break;
case 'presschg':
// Decoding for rapid pressure changes
if (strtolower($result[1]) == 'r') {
$weatherData['remark']['presschg'] = Horde_Service_Weather_Translation::t('Pressure rising rapidly');
} else {
$weatherData['remark']['presschg'] = Horde_Service_Weather_Translation::t('Pressure falling rapidly');
}
unset($metarCode['presschg']);
break;
case 'seapressure':
// Pressure at sea level (delivered in hpa)
// Decoding is a bit obscure as 982 gets 998.2
// whereas 113 becomes 1113 -> no real rule here
if (strtolower($result[1]) != 'no') {
if ($result[1] > 500) {
$press = 900 + round($result[1] / 100, 1);
} else {
$press = 1000 + $result[1];
}
$weatherData['remark']['seapressure'] = Horde_Service_Weather::convertPressure(
$press,
'hpa',
$this->_unitMap[self::UNIT_KEY_PRESSURE]
);
}
unset($metarCode['seapressure']);
break;
case 'precip':
// Precipitation in inches
if (!isset($weatherData['precipitation'])) {
$weatherData['precipitation'] = array();
}
if (!is_numeric($result[2])) {
$precip = 'indeterminable';
} elseif ($result[2] == '0000') {
$precip = 'traceable';
} else {
$precip = $result[2] / 100;
}
$weatherData['precipitation'][] = array(
'amount' => $precip,
'hours' => $this->_hours[$result[1]]
);
break;
case 'snowdepth':
// Snow depth in inches
// @todo convert to metric
$weatherData['remark']['snowdepth'] = $result[1];
unset($metarCode['snowdepth']);
break;
case 'snowequiv':
// Same for equivalent in Water... (inches)
// @todo convert
$weatherData['remark']['snowequiv'] = $result[1] / 10;
unset($metarCode['snowequiv']);
break;
case 'cloudtypes':
// Cloud types
$weatherData['remark']['cloudtypes'] = array(
'low' => $this->_cloudTypes['low'][$result[1]],
'middle' => $this->_cloudTypes['middle'][$result[2]],
'high' => $this->_cloudTypes['high'][$result[3]]
);
unset($metarCode['cloudtypes']);
break;
case 'sunduration':
// Duration of sunshine (in minutes)
$weatherData['remark']['sunduration'] = sprintf(
Horde_Service_Weather_Translation::t('Total minutes of sunshine: %s'),
$result[1]
);
unset($metarCode['sunduration']);
break;
case '1htempdew':
// Temperatures in the last hour in C
if ($result[1] == '1') {
$result[2] *= -1;
}
$weatherData['remark']['1htemp'] = Horde_Service_Weather::convertTemperature(
$result[2] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
if (sizeof($result) > 3) {
// same for dewpoint
if ($result[4] == '1') {
$result[5] *= -1;
}
$weatherData['remark']['1hdew'] = Horde_Service_Weather::convertTemperature(
$result[5] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
}
unset($metarCode['1htempdew']);
break;
case '6hmaxtemp':
// Max temperature in the last 6 hours in C
if ($result[1] == '1') {
$result[2] *= -1;
}
$weatherData['remark']['6hmaxtemp'] = Horde_Service_Weather::convertTemperature(
$result[2] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
unset($metarCode['6hmaxtemp']);
break;
case '6hmintemp':
// Min temperature in the last 6 hours in C
if ($result[1] == '1') {
$result[2] *= -1;
}
$weatherData['remark']['6hmintemp'] = Horde_Service_Weather::convertTemperature(
$result[2] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
unset($metarCode['6hmintemp']);
break;
case '24htemp':
// Max/Min temperatures in the last 24 hours in C
if ($result[1] == '1') {
$result[2] *= -1;
}
$weatherData['remark']['24hmaxtemp'] = Horde_Service_Weather::convertTemperature(
$result[2] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
if ($result[3] == '1') {
$result[4] *= -1;
}
$weatherData['remark']['24hmintemp'] = Horde_Service_Weather::convertTemperature(
$result[4] / 10,
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
unset($metarCode['24htemp']);
break;
case '3hpresstend':
// Pressure tendency of the last 3 hours
// no special processing, just passing the data
$weatherData['remark']['3hpresstend'] = array(
'presscode' => $result[1],
'presschng' => Horde_Service_Weather::convertPressure($result[2] / 10, 'hpa', $this->_unitMap[self::UNIT_KEY_PRESSURE]),
'description' => ($result[1] >= 0 && $result[1] <=3)
? Horde_Service_Weather_Translation::t('Rising')
: ($result[1] == 4)
? Horde_Service_Weather_Translation::t('Steady')
: ($result[1] > 4)
? Horde_Service_Weather_Translation::t('Falling') : ''
);
unset($metarCode['3hpresstend']);
break;
case 'nospeci':
// No change during the last hour
$weatherData['remark']['nospeci'] = Horde_Service_Weather_Translation::t('No changes in weather conditions');
unset($metarCode['nospeci']);
break;
case 'sensors':
// We may have multiple broken sensors, so do not unset
if (!isset($weatherData['remark']['sensors'])) {
$weatherData['remark']['sensors'] = array();
}
$weatherData['remark']['sensors'][strtolower($result[0])] = $this->_sensors[strtolower($result[0])];
break;
case 'maintain':
$weatherData['remark']['maintain'] = Horde_Service_Weather_Translation::t('Maintainance needed');
unset($metarCode['maintain']);
break;
default:
// Do nothing, just prevent further matching
unset($metarCode[$key]);
break;
}
if ($found) {
break;
}
}
}
}
return $weatherData;
}
/**
* Return the array of regexps used to parse METAR text. We don't define
* this in the declaration since we unset the entries as they are parsed.
*
* @return array
*/
protected function _getMetarCodes()
{
return array(
'report' => 'METAR|SPECI',
'station' => '\w{4}',
'update' => '(\d{2})?(\d{4})Z',
'type' => 'AUTO|COR',
'wind' => '(\d{3}|VAR|VRB)(\d{2,3})(G(\d{2,3}))?(FPS|KPH|KT|KTS|MPH|MPS)',
'windVar' => '(\d{3})V(\d{3})',
'visFrac' => '(\d{1})',
'visibility' => '(\d{4})|((M|P)?((\d{1,2}|((\d) )?(\d)\/(\d))(SM|KM)))|(CAVOK)',
'runway' => 'R(\d{2})(\w)?\/(P|M)?(\d{4})(FT)?(V(P|M)?(\d{4})(FT)?)?(\w)?',
'condition' => '(-|\+|VC|RE|NSW)?(MI|BC|PR|TS|BL|SH|DR|FZ)?((DZ)|(RA)|(SN)|(SG)|(IC)|(PE)|(PL)|(GR)|(GS)|(UP))*(BR|FG|FU|VA|DU|SA|HZ|PY)?(PO|SQ|FC|SS|DS)?',
'clouds' => '(SKC|CLR|NSC|((FEW|SCT|BKN|OVC|VV)(\d{3}|\/{3})(TCU|CB)?))',
'temperature' => '(M)?(\d{2})\/((M)?(\d{2})|XX|\/\/)?',
'pressure' => '(A)(\d{4})|(Q)(\d{4})',
'trend' => 'NOSIG|TEMPO|BECMG',
'remark' => 'RMK'
);
}
/**
* Return the array of regexps used to parse METAR remarks section.
*
* @return array
*/
protected function _getRemarks()
{
return array(
'nospeci' => 'NOSPECI',
'autostation' => 'AO(1|2)',
'presschg' => 'PRES(R|F)R',
'seapressure' => 'SLP(\d{3}|NO)',
'precip' => '(P|6|7)(\d{4}|\/{4})',
'snowdepth' => '4\/(\d{3})',
'snowequiv' => '933(\d{3})',
'cloudtypes' => '8\/(\d|\/)(\d|\/)(\d|\/)',
'sunduration' => '98(\d{3})',
'1htempdew' => 'T(0|1)(\d{3})((0|1)(\d{3}))?',
'6hmaxtemp' => '1(0|1)(\d{3})',
'6hmintemp' => '2(0|1)(\d{3})',
'24htemp' => '4(0|1)(\d{3})(0|1)(\d{3})',
'3hpresstend' => '5([0-8])(\d{3})',
'sensors' => 'RVRNO|PWINO|PNO|FZRANO|TSNO|VISNO|CHINO',
'maintain' => '[\$]'
);
}
}
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