137 lines
2.8 KiB
PHP
Executable File
137 lines
2.8 KiB
PHP
Executable File
<?php
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namespace Kirby\Image;
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/**
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* Returns the latitude and longitude values
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* for exif location data if available
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*
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* @package Kirby Image
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* @author Bastian Allgeier <bastian@getkirby.com>
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* @link https://getkirby.com
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* @copyright Bastian Allgeier GmbH
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* @license https://opensource.org/licenses/MIT
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*/
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class Location
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{
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/**
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* latitude
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*
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* @var float|null
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*/
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protected $lat;
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/**
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* longitude
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*
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* @var float|null
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*/
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protected $lng;
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/**
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* Constructor
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*
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* @param array $exif The entire exif array
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*/
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public function __construct(array $exif)
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{
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if (isset($exif['GPSLatitude']) === true &&
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isset($exif['GPSLatitudeRef']) === true &&
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isset($exif['GPSLongitude']) === true &&
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isset($exif['GPSLongitudeRef']) === true
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) {
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$this->lat = $this->gps($exif['GPSLatitude'], $exif['GPSLatitudeRef']);
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$this->lng = $this->gps($exif['GPSLongitude'], $exif['GPSLongitudeRef']);
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}
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}
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/**
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* Returns the latitude
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*
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* @return float|null
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*/
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public function lat()
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{
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return $this->lat;
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}
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/**
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* Returns the longitude
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*
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* @return float|null
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*/
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public function lng()
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{
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return $this->lng;
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}
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/**
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* Converts the gps coordinates
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*
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* @param string|array $coord
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* @param string $hemi
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* @return float
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*/
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protected function gps($coord, string $hemi): float
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{
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$degrees = count($coord) > 0 ? $this->num($coord[0]) : 0;
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$minutes = count($coord) > 1 ? $this->num($coord[1]) : 0;
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$seconds = count($coord) > 2 ? $this->num($coord[2]) : 0;
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$hemi = strtoupper($hemi);
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$flip = ($hemi == 'W' || $hemi == 'S') ? -1 : 1;
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return $flip * ($degrees + $minutes / 60 + $seconds / 3600);
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}
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/**
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* Converts coordinates to floats
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*
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* @param string $part
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* @return float
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*/
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protected function num(string $part): float
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{
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$parts = explode('/', $part);
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if (count($parts) == 1) {
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return $parts[0];
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}
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return (float)($parts[0]) / (float)($parts[1]);
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}
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/**
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* Converts the object into a nicely readable array
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*
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* @return array
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*/
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public function toArray(): array
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{
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return [
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'lat' => $this->lat(),
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'lng' => $this->lng()
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];
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}
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/**
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* Echos the entire location as lat, lng
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*
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* @return string
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*/
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public function __toString(): string
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{
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return trim(trim($this->lat() . ', ' . $this->lng(), ','));
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}
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/**
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* Improved `var_dump` output
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*
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* @return array
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*/
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public function __debugInfo(): array
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{
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return $this->toArray();
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}
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}
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