/usr/share/php/Horde/Service/Weather/Parser/Taf.php is in php-horde-service-weather 2.5.4-1ubuntu1.
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The actual contents of the file can be viewed below.
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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_Taf
*
* Responsible for parsing encoded TAF 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_Taf extends Horde_Service_Weather_Parser_Base
{
/**
* Parses TAF data.
*
* TAF KLGA 271734Z 271818 11007KT P6SM -RA SCT020 BKN200
* FM2300 14007KT P6SM SCT030 BKN150
* FM0400 VRB03KT P6SM SCT035 OVC080 PROB30 0509 P6SM -RA BKN035
* FM0900 VRB03KT 6SM -RA BR SCT015 OVC035
* TEMPO 1215 5SM -RA BR SCT009 BKN015
* BECMG 1517 16007KT P6SM NSW SCT015 BKN070
*
* @param array $data The TAF encoded weather data, spilt on line endings.
*
* @return array An array of forecast data. Keys include:
* - station: (string) The station identifier.
* - dataRaw: (string) The raw TAF data.
* - update: (timestamp) Timestamp of last update.
* - validFrom: (Horde_Date) The valid FROM time.
* - validTo: (Horde_Date) The valid TO time.
* - time: (array) An array of Horde_Service_Weather_Period objects for
* each available valid time provided by the TAF report.
*/
protected function _parse(array $data)
{
$tafCode = $this->_getTafCodes();
// Eliminate trailing information
for ($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;
}
}
// Ok, we have correct data, start with parsing the first line for the last update
$forecastData = array();
$forecastData['station'] = '';
$forecastData['dataRaw'] = implode(' ', $data);
$forecastData['update'] = strtotime(trim($data[0]) . ' GMT');
$forecastData['updateRaw'] = trim($data[0]);
// and prepare the rest for stepping through
array_shift($data);
$taf = explode(' ', preg_replace('/\s{2,}/', ' ', implode(' ', $data)));
// The timeperiod the data gets added to
$fromTime = '';
// If we have FMCs (Forecast Meteorological Conditions), we need this
$fmcCount = 0;
// Pointer to the array we add the data to
$pointer = &$forecastData;
for ($i = 0; $i < sizeof($taf); $i++) {
$taf[$i] = trim($taf[$i]);
if (!strlen($taf[$i])) {
continue;
}
// Init
$result = array();
$resultVF = array();
$lresult = array();
$found = false;
foreach ($tafCode as $key => $regexp) {
// Check if current code matches current taf snippet
if (($found = preg_match('/^' . $regexp . '$/i', $taf[$i], $result)) == true) {
$insert = array();
switch ($key) {
case 'station':
$pointer['station'] = $result[0];
unset($tafCode['station']);
break;
case 'valid':
$pointer['validRaw'] = $result[0];
// Generates the timeperiod the report is valid for
list($year, $month, $day) = explode('-', gmdate('Y-m-d', $forecastData['update']));
// Date is in next month
if ($result[1] < $day) {
$month++;
}
$pointer['validFrom'] = new Horde_Date(array(
'hour' => $result[2],
'month' => $month,
'mday' => $result[1],
'year' => $year), 'GMT');
$pointer['validTo'] = new Horde_Date(array(
'hour' => $result[4],
'month' => $month,
'mday' => $result[3],
'year' => $year), 'GMT');
unset($tafCode['valid']);
// Now the groups will start, so initialize the time groups
$pointer['time'] = array();
$start_time = new Horde_Date(array(
'year' => $year,
'month' => $month,
'mday' => $result[1],
'hour' => $result[2]), 'UTC');
$fromTime = (string)$start_time;
$pointer['time'][$fromTime] = array();
// Set pointer to the first timeperiod
$pointer = &$pointer['time'][$fromTime];
break;
case 'wind':
if ($result[5] == 'KTS') {
$result[5] = 'KT';
}
$pointer['wind'] = round(Horde_Service_Weather::convertSpeed(
$result[2],
$result[5],
$this->_unitMap[self::UNIT_KEY_SPEED]
));
if ($result[1] == 'VAR' || $result[1] == 'VRB') {
$pointer['windDegrees'] = Horde_Service_Weather_Translation::t('Variable');
$pointer['windDirection'] = Horde_Service_Weather_Translation::t('Variable');
} else {
$pointer['windDegrees'] = $result[1];
$pointer['windDirection'] = Horde_Service_Weather::degToDirection($result[1]);
}
if (is_numeric($result[4])) {
$pointer['windGust'] = round(Horde_Service_Weather::convertSpeed(
$result[4],
$result[5],
$this->_unitMap[self::UNIT_KEY_SPEED]
));
}
if (isset($probability)) {
$pointer['windProb'] = $probability;
unset($probability);
}
unset($tafCode['wind']);
break;
case 'visFrac':
// Possible fractional visibility here.
// Check if it matches with the next TAF piece for visibility
if (!isset($taf[$i + 1]) ||
!preg_match('/^' . $tafCode['visibility'] . '$/i', $result[1] . ' ' . $taf[$i + 1], $resultVF)) {
// No next TAF piece available or not matching.
$found = false;
break;
}
// Match. Hand over result and advance TAF
$key = 'visibility';
$result = $resultVF;
$i++;
// Fall through
case 'visibility':
$pointer['visQualifier'] = Horde_Service_Weather_Translation::t('AT');
if (is_numeric($result[1]) && ($result[1] == 9999)) {
// Upper limit of visibility range
$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)
);
$pointer['condition'] = Horde_Service_Weather_Translation::t('No significant weather');
}
if (isset($probability)) {
$pointer['visProb'] = $probability;
unset($probability);
}
$pointer['visibility'] = $visibility;
break;
case 'condition':
// First some basic setups
if (!isset($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']);
if (isset($probability)) {
$pointer['condition'] .= ' (' . $probability
. '% '
. Horde_Service_Weather_Translation::t('probability')
. ').';
unset($probability);
}
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])]);
}
if (isset($probability)) {
$cloud['prob'] = $probability;
unset($probability);
}
$pointer['clouds'][] = $cloud;
break;
case 'windshear':
// Parse windshear, if available
if ($result[4] == 'KTS') {
$result[4] = 'KT';
}
$pointer['windshear'] = round(Horde_Service_Weather::convertSpeed(
$result[3],
$result[4],
$this->_unitMap[self::UNIT_KEY_SPEED]
));
$pointer['windshearHeight'] = $result[1] * 100;
$pointer['windshearDegrees'] = $result[2];
$pointer['windshearDirection'] = Horde_Service_Weather::degToDirection($result[2]);
break;
case 'tempmax':
$forecastData['temperatureHigh'] = Horde_Service_Weather::convertTemperature(
$result[1],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
break;
case 'tempmin':
// Parse max/min temperature
$forecastData['temperatureLow'] = Horde_Service_Weather::convertTemperature(
$result[1],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
break;
case 'tempmaxmin':
$forecastData['temperatureHigh'] = Horde_Service_Weather::convertTemperature(
$result[1],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
$forecastData['temperatureLow'] = Horde_Service_Weather::convertTemperature(
$result[4],
'c',
$this->_unitMap[self::UNIT_KEY_TEMP]
);
break;
case 'from':
// Next timeperiod is coming up, prepare array and
// set pointer accordingly
$fromTime = clone $start_time;
if (sizeof($result) > 2) {
// The ICAO way
$fromTime->hour = $result[2];
$fromTime->min = $result[3];
} else {
// The Australian way (Hey mates!)
$fromTime->hour = $result[1];
}
if ($start_time->compareDateTime($fromTime) >= 1) {
$fromTime->mday++;
}
$fromTime = (string)$fromTime;
$forecastData['time'][$fromTime] = array();
$fmcCount = 0;
$pointer = &$forecastData['time'][$fromTime];
break;
case 'fmc';
// Test, if this is a probability for the next FMC
if (isset($result[2]) && preg_match('/^BECMG|TEMPO$/i', $taf[$i + 1], $lresult)) {
// Set type to BECMG or TEMPO
$type = $lresult[0];
// Set probability
$probability = $result[2];
// Now extract time for this group
if (preg_match('/^(\d{2})(\d{2})$/i', $taf[$i + 2], $lresult)) {
$from = clone($start_time);
$from->hour = $lresult[1];
if ($start_time->compareDateTime($from) >= 1) {
$from->mday++;
}
$to = clone($from);
$to->hour = $lresult[2];
if ($start_time->compareDateTime($to) >= 1) {
$to->mday++;
}
// As we now have type, probability and time for this FMC
// from our TAF, increase field-counter
$i += 2;
} else {
// No timegroup present, so just increase field-counter by one
$i += 1;
}
} elseif (preg_match('/^(\d{2})(\d{2})\/(\d{2})(\d{2})$/i', $taf[$i + 1], $lresult)) {
// Normal group, set type and use extracted time
$type = $result[1];
// Check for PROBdd
if (isset($result[2])) {
$probability = $result[2];
}
$from = clone($start_time);
$from->hour = $lresult[2];
if ($start_time->compareDateTime($from) >= 1) {
$from->mday++;
}
$to = clone($from);
$to->hour = $lresult[4];
if ($start_time->compareDateTime($to) >= 1) {
$to->mday++;
}
// Same as above, we have a time for this FMC from our TAF,
// increase field-counter
$i += 1;
} elseif (isset($result[2])) {
// This is either a PROBdd or a malformed TAF with missing timegroup
$probability = $result[2];
}
// Handle the FMC, generate neccessary array if it's the first...
if (isset($type)) {
if (!isset($forecastData['time'][$fromTime]['fmc'])) {
$forecastData['time'][$fromTime]['fmc'] = array();
}
$forecastData['time'][$fromTime]['fmc'][$fmcCount] = array();
// ...and set pointer.
$pointer = &$forecastData['time'][$fromTime]['fmc'][$fmcCount];
$fmcCount++;
// Insert data
$pointer['type'] = $type;
unset($type);
if (isset($from)) {
$pointer['from'] = $from;
$pointer['to'] = $to;
unset($from, $to);
}
if (isset($probability)) {
$pointer['probability'] = $probability;
unset($probability);
}
}
break;
default:
// Do nothing
break;
}
if ($found) {
break;
}
}
}
}
return $forecastData;
}
/**
* Return a fresh set of the regexps needed for parsing the TAF data.
*
* @return array
*/
protected function _getTafCodes()
{
return array(
'report' => 'TAF|AMD',
'station' => '\w{4}',
'update' => '(\d{2})?(\d{4})Z',
'valid' => '(\d{2})(\d{2})\/(\d{2})(\d{2})',
'wind' => '(\d{3}|VAR|VRB)(\d{2,3})(G(\d{2,3}))?(FPS|KPH|KT|KTS|MPH|MPS)',
'visFrac' => '(\d{1})',
'visibility' => '(\d{4})|((M|P)?((\d{1,2}|((\d) )?(\d)\/(\d))(SM|KM)))|(CAVOK)',
'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)?))',
'windshear' => 'WS(\d{3})\/(\d{3})(\d{2,3})(FPS|KPH|KT|KTS|MPH|MPS)',
'tempmax' => 'TX(\d{2})\/(\d{2})(\w)',
'tempmin' => 'TN(\d{2})\/(\d{2})(\w)',
'tempmaxmin' => 'TX(\d{2})\/(\d{2})(\w)TN(\d{2})\/(\d{2})(\w)',
'from' => 'FM(\d{2})(\d{2})(\d{2})?Z?',
'fmc' => '(PROB|BECMG|TEMPO)(\d{2})?'
);
}
}
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