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<?php |
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/* |
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* OpenWeatherMap-PHP-API — A PHP API to parse weather data from https://OpenWeatherMap.org. |
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* |
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* @license MIT |
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* |
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* Please see the LICENSE file distributed with this source code for further |
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* information regarding copyright and licensing. |
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* |
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* Please visit the following links to read about the usage policies and the license of |
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* OpenWeatherMap data before using this library: |
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* |
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* @see https://OpenWeatherMap.org/price |
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* @see https://OpenWeatherMap.org/terms |
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* @see https://OpenWeatherMap.org/appid |
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*/ |
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namespace Cmfcmf\OpenWeatherMap\Util; |
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use JsonSerializable; |
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/** |
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* The unit class representing a unit object. |
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*/ |
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class Unit implements JsonSerializable |
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{ |
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/** |
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* @var float The value. |
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* |
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* @internal |
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*/ |
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private $value; |
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/** |
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* @var string The value's unit. |
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* |
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* @internal |
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*/ |
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private $unit; |
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/** |
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* @var string The value's description. |
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* |
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* @internal |
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*/ |
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private $description; |
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/** |
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* @var float|null The value's measurement precision. Can be null if unknown. |
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*/ |
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private $precision; |
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/** |
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* Create a new unit object. |
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* |
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* @param float $value The value. |
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* @param string $unit The unit of the value. |
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* @param string $description The description of the value. |
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* @param float|null $precision The precision of the value, or null if unknown. |
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* |
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* @internal |
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*/ |
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public function __construct($value = 0.0, $unit = "", $description = "", $precision = null) |
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{ |
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$this->value = (float)$value; |
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$this->unit = (string)$unit; |
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$this->description = (string)$description; |
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$this->precision = $precision === null ? null : (float)$precision; |
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} |
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/** |
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* Get the value as formatted string with unit. |
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* |
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* @return string The value as formatted string with unit. |
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* |
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* The unit is not included if it is empty. |
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*/ |
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public function __toString() |
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{ |
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return $this->getFormatted(); |
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} |
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/** |
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* Get the value's unit. |
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* |
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* @return string The value's unit. |
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* |
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* This also converts 'celsius' to '°C' and 'fahrenheit' to '°F'. |
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*/ |
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public function getUnit() |
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{ |
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// Units are inconsistent. Only celsius and fahrenheit are not abbreviated. This check fixes that. |
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// Also, the API started to return "metric" as temperature unit recently. Also fix that. |
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if ($this->unit == 'celsius' || $this->unit == 'metric') { |
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return "°C"; |
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} elseif ($this->unit == 'fahrenheit') { |
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return '°F'; |
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} else { |
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return $this->unit; |
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} |
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} |
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/** |
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* Get the value. |
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* |
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* @return float The value. |
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*/ |
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public function getValue() |
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{ |
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return $this->value; |
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} |
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/** |
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* Get the value's description. |
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* |
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* @return string The value's description. |
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*/ |
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public function getDescription() |
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{ |
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return $this->description; |
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} |
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/** |
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* Get the value's precision. |
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* |
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* @return float|null The value's precision. Can be null if unknown. |
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*/ |
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public function getPrecision() |
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{ |
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return $this->precision; |
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} |
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/** |
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* Get the value as formatted string with unit. |
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* |
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* @return string The value as formatted string with unit. |
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* |
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* The unit is not included if it is empty. |
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*/ |
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public function getFormatted() |
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{ |
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if ($this->getUnit() != "") { |
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return $this->getValue() . " " . $this->getUnit(); |
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} else { |
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return (string)$this->getValue(); |
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} |
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} |
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/** |
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* Get Unit properties when encoding to JSON |
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* |
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* @return array |
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*/ |
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public function jsonSerialize() |
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{ |
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return [ |
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'value' => $this->getValue(), |
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'unit' => $this->getUnit(), |
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'description' => $this->getDescription(), |
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'precision' => $this->getPrecision() |
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]; |
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} |
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} |
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