public function parse($remaining_metar, $cavok = false)
{
$result = $this->consume($remaining_metar);
$found = $result['found'];
$new_remaining_metar = $result['remaining'];
// handle the case where nothing has been found and metar is not cavok
if ($found == null && !$cavok) {
throw new ChunkDecoderException($remaining_metar, $new_remaining_metar, 'Bad format for clouds information', $this);
}
// default case: CAVOK or clear sky, no cloud layer
$result = array('clouds' => array());
// there are clouds, handle cloud layers and visibility
if ($found != null && $found[2] == null) {
for ($i = 3; $i <= 15; $i += 4) {
if ($found[$i] != null) {
$layer = new CloudLayer();
$layer_height = Value::toInt($found[$i + 2]);
if ($layer_height !== null) {
$layer_height_ft = $layer_height * 100;
} else {
$layer_height_ft = null;
}
$layer->setChunk(trim($found[$i]));
$layer->setAmount($found[$i + 1])->setBaseHeight(Value::newValue($layer_height_ft, Value::FEET))->setType($found[$i + 3]);
$result['clouds'][] = $layer;
}
}
}
// return result + remaining metar
return array('result' => $result, 'remaining_metar' => $new_remaining_metar);
}
public function parse($remaining_metar, $cavok = false)
{
$result = $this->consume($remaining_metar);
$found = $result['found'];
$new_remaining_metar = $result['remaining'];
// handle the case where nothing has been found
if ($found == null) {
throw new ChunkDecoderException($remaining_metar, $new_remaining_metar, 'Bad format for visibility information', $this);
}
if ($found[1] == 'CAVOK') {
// cloud and visibility OK
$cavok = true;
$visibility = null;
} elseif ($found[1] == '////') {
// information not available
$cavok = false;
$visibility = null;
} else {
$cavok = false;
$visibility = new Visibility();
if ($found[2] != null) {
// icao visibility
$visibility->setChunk(trim($found[1]));
$visibility->setVisibility(Value::newIntValue($found[2], Value::METER));
if ($found[4] != null) {
$visibility->setMinimumVisibility(Value::newIntValue($found[5], Value::METER))->setMinimumVisibilityDirection($found[6]);
}
$visibility->setNDV($found[3] != null);
} else {
// us visibility
$main = intval($found[7]);
$frac_top = intval($found[9]);
$frac_bot = intval($found[10]);
if ($frac_bot != 0) {
$vis_value = $main + $frac_top / $frac_bot;
} else {
$vis_value = $main;
}
$visibility->setChunk(trim($found[1]));
$visibility->setVisibility(Value::newValue($vis_value, Value::STATUTE_MILE));
}
}
// return result + remaining metar
return array('result' => array('cavok' => $cavok, 'visibility' => $visibility), 'remaining_metar' => $new_remaining_metar);
}
public function parse($remaining_metar, $cavok = false)
{
$result = $this->consume($remaining_metar);
$found = $result['found'];
$new_remaining_metar = $result['remaining'];
// throw error if nothing has been found
if ($found == null) {
throw new ChunkDecoderException($remaining_metar, $new_remaining_metar, 'Atmospheric pressure not found', $this);
}
$raw_value = Value::toInt($found[2]);
$type = $found[1];
// convert value if needed
if ($type == 'A') {
$raw_value = $raw_value / 100;
}
$value = Value::newValue($raw_value, $this->units[$type]);
// retrieve found params
$result = array('pressure' => $value);
// return result + remaining metar
return array('result' => $result, 'remaining_metar' => $new_remaining_metar);
}
