Simplify countries

src/Actions/Belgium.php → src/Countries/Belgium.php

@@ -1,13 +1,17 @@
 <?php
 
-namespace Spatie\Holidays\Actions;
+namespace Spatie\Holidays\Countries;
 
 use Carbon\CarbonImmutable;
-use Spatie\Holidays\Exceptions\HolidaysException;
 
-class Belgium implements Executable
+class Belgium extends Country
 {
-    public function execute(int $year): array
+    public function countryCode(): string
+    {
+        return 'be';
+    }
+
+    public function get(int $year): array
     {
         $this->ensureYearCanBeCalculated($year);
 
@@ -17,17 +21,6 @@ public function execute(int $year): array
         return array_merge($fixedHolidays, $variableHolidays);
     }
 
-    protected function ensureYearCanBeCalculated(int $year): void
-    {
-        if ($year < 1970) {
-            throw HolidaysException::yearTooLow();
-        }
-
-        if ($year > 2037) {
-            throw HolidaysException::yearTooHigh();
-        }
-    }
-
     /** @return array<string, CarbonImmutable> */
     protected function fixedHolidays(int $year): array
     {

src/Countries/Country.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Spatie\Holidays\Countries;
+
+use Spatie\Holidays\Exceptions\InvalidYear;
+
+abstract class Country
+{
+    public static function find(string $countryCode): ?Country
+    {
+        $countryCode = strtolower($countryCode);
+
+        foreach (glob(__DIR__.'/../Countries/*.php') as $filename) {
+            if (basename($filename) === 'Country.php') {
+                continue;
+            }
+
+            // determine class name from file name
+            $countryClass = '\\Spatie\\Holidays\\Countries\\'.basename($filename, '.php');
+
+            /** @var \Spatie\Holidays\Countries\Country $country */
+            $country = new $countryClass;
+
+            if (strtolower($country->countryCode()) === $countryCode) {
+                return $country;
+            }
+        }
+
+        return null;
+    }
+
+    abstract public function countryCode(): string;
+
+    abstract public function get(int $year): array;
+
+    protected static function ensureYearCanBeCalculated(int $year): void
+    {
+        if ($year < 1970) {
+            throw InvalidYear::yearTooLow();
+        }
+
+        if ($year > 2037) {
+            throw InvalidYear::yearTooHigh();
+        }
+    }
+}

src/Exceptions/HolidaysException.php → src/Exceptions/InvalidYear.php

@@ -4,7 +4,7 @@
 
 use RuntimeException;
 
-class HolidaysException extends RuntimeException
+class InvalidYear extends RuntimeException
 {
     public static function yearTooLow(): self
     {

src/Exceptions/UnsupportedCountry.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Spatie\Holidays\Exceptions;
+
+use RuntimeException;
+
+class UnsupportedCountry extends RuntimeException
+{
+    public static function make(string $countryCode): self
+    {
+        return new self("Country code `{$countryCode}` is not supported.");
+    }
+}

src/Holidays.php

@@ -3,7 +3,8 @@
 namespace Spatie\Holidays;
 
 use Carbon\CarbonImmutable;
-use Spatie\Holidays\Enums\Country;
+use Spatie\Holidays\Countries\Country;
+use Spatie\Holidays\Exceptions\UnsupportedCountry;
 
 class Holidays
 {
@@ -19,7 +20,7 @@ private function __construct(
         ?Country $country = null,
     ) {
         $this->year = $year ?? CarbonImmutable::now()->year;
-        $this->country = $country ?? Country::Belgium; // @todo make configurable ?
+        $this->country = $country ?? Country::find('be');
     }
 
     public static function new(): static
@@ -37,12 +38,20 @@ public static function all(): array
 
     public function year(int $year): static
     {
-        return new static(year: $year);
+        return new static(year: $year, country: $this->country);
     }
 
-    public function country(string $countryCode): static
+    public function country(string $countryCode)
     {
-        return new static(country: Country::from($countryCode));
+        $country = Country::find($countryCode);
+
+        if (! $country) {
+            throw UnsupportedCountry::make($countryCode);
+        }
+
+        $this->country = Country::find($countryCode);
+
+        return $this;
     }
 
     /** @return array<array{name: string, date: string}> */
@@ -57,9 +66,7 @@ public function get(): array
 
     protected function calculate(): self
     {
-        $this->holidays = $this->country
-            ->action()
-            ->execute($this->year);
+        $this->holidays = $this->country->get($this->year);
 
         uasort($this->holidays,
             fn (CarbonImmutable $a, CarbonImmutable $b) => $a->timestamp <=> $b->timestamp

tests/HolidaysTest.php

@@ -1,7 +1,8 @@
 <?php
 
 use Carbon\CarbonImmutable;
-use Spatie\Holidays\Exceptions\HolidaysException;
+use Spatie\Holidays\Exceptions\InvalidYear;
+use Spatie\Holidays\Exceptions\UnsupportedCountry;
 use Spatie\Holidays\Holidays;
 
 it('can get all holidays of the current year', function () {
@@ -30,7 +31,7 @@
 
 it('can get all holidays of another year and a specific country', function () {
     $holidays = Holidays::new()
-        ->year(2023)
+        ->year(2024)
         ->country('BE')
         ->get();
 
@@ -39,12 +40,12 @@
 
 it('cannot get all holidays of an unknown country code', function () {
     Holidays::new()->country('unknown')->get();
-})->throws(ValueError::class);
+})->throws(UnsupportedCountry::class);
 
 it('cannot get holidays for years before 1970', function () {
     Holidays::new()->year(1969)->get();
-})->throws(HolidaysException::class, 'Holidays can only be calculated for years after 1970.');
+})->throws(InvalidYear::class, 'Holidays can only be calculated for years after 1970.');
 
 it('cannot get holidays for years after 2037', function () {
     Holidays::new()->year(2038)->get();
-})->throws(HolidaysException::class, 'Holidays can only be calculated for years before 2038');
+})->throws(InvalidYear::class, 'Holidays can only be calculated for years before 2038');