Add support for compressed grid files

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+## [5.8.0] - 2024-02-03
+### Added
+- Support for compressed grid files to reduce distribution sizes
+
 ## [5.7.0] - 2024-01-27
 ### Changed
 - Updates to data for Canada, Denmark, France, Germany and USA
@@ -317,8 +321,9 @@ Initial release of this fork (based off of v2.3 of original)
  - Eastings and northings are rounded to 1m, and lat/long to 5dp (approx 1m) to avoid any misconceptions that precision is the same thing as accuracy.
  - When calculating surface distances, a more accurate mean radius is now used rather than that derived from historical definitions of a nautical mile
 
-[Unreleased]: https://github.com/dvdoug/PHPCoord/compare/v5.7.0..master
+[Unreleased]: https://github.com/dvdoug/PHPCoord/compare/v5.8.0..master
 
+[5.8.0]: https://github.com/dvdoug/PHPCoord/compare/v5.7.0..v5.8.0
 [5.7.0]: https://github.com/dvdoug/PHPCoord/compare/v5.6.0..v5.7.0
 [5.6.0]: https://github.com/dvdoug/PHPCoord/compare/v5.5.0..v5.6.0
 [5.5.0]: https://github.com/dvdoug/PHPCoord/compare/v5.4.0..v5.5.0

composer.json

@@ -13,6 +13,7 @@
  "license": "(MIT and proprietary)",
  "require": {
  "php": "^8.0",
+ "ext-zip": "*",
  "composer-runtime-api": "^2.1",
  "composer/pcre": "^3.1",
  "opis/json-schema": "^2.3"

src/CoordinateOperation/GridFile.php

@@ -9,14 +9,33 @@
 namespace PHPCoord\CoordinateOperation;
 
 use SplFileObject;
+use ZipArchive;
 
 use function assert;
+use function file_exists;
+use function sys_get_temp_dir;
+use function str_ends_with;
 
 /**
  * @internal
  */
 class GridFile extends SplFileObject
 {
+ public function __construct(string $filename)
+ {
+ if (str_ends_with($filename, '.zip')) {
+ $zip = new ZipArchive();
+ $zip->open($filename);
+ $filename = sys_get_temp_dir() . '/' . $zip->getNameIndex(0); // only 1 file inside
+
+ if (!file_exists($filename)) {
+ $zip->extractTo(sys_get_temp_dir());
+ }
+ }
+
+ parent::__construct($filename);
+ }
+
  public function fgets(): string
  {
  $result = parent::fgets();