78 lines
1.7 KiB
PHP
78 lines
1.7 KiB
PHP
<?php
|
|
|
|
namespace App\Services;
|
|
|
|
use App\Models\Coupon;
|
|
|
|
class CouponCodePool
|
|
{
|
|
/** @var list<string>|null */
|
|
private ?array $allCodesCache = null;
|
|
|
|
public function __construct(
|
|
private ?string $codesPath = null,
|
|
) {}
|
|
|
|
/**
|
|
* @return list<string>
|
|
*/
|
|
public function allCodes(): array
|
|
{
|
|
if ($this->allCodesCache !== null) {
|
|
return $this->allCodesCache;
|
|
}
|
|
|
|
$path = $this->codesPath ?? resource_path('codes/codes.txt');
|
|
|
|
if (! is_readable($path)) {
|
|
throw new \RuntimeException("Coupon codes file is not readable: {$path}");
|
|
}
|
|
|
|
$lines = file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
|
|
|
|
if ($lines === false) {
|
|
throw new \RuntimeException("Unable to read coupon codes file: {$path}");
|
|
}
|
|
|
|
$codes = array_values(array_filter(array_map(trim(...), $lines)));
|
|
|
|
if ($codes === []) {
|
|
throw new \RuntimeException("Coupon codes file is empty: {$path}");
|
|
}
|
|
|
|
return $this->allCodesCache = $codes;
|
|
}
|
|
|
|
/**
|
|
* @return list<string>
|
|
*/
|
|
public function usedCodes(): array
|
|
{
|
|
return Coupon::query()->pluck('code')->all();
|
|
}
|
|
|
|
/**
|
|
* @return list<string>
|
|
*/
|
|
public function availableCodes(): array
|
|
{
|
|
return array_values(array_diff($this->allCodes(), $this->usedCodes()));
|
|
}
|
|
|
|
public function hasAvailable(): bool
|
|
{
|
|
return $this->availableCodes() !== [];
|
|
}
|
|
|
|
public function pickRandom(): ?string
|
|
{
|
|
$available = $this->availableCodes();
|
|
|
|
if ($available === []) {
|
|
return null;
|
|
}
|
|
|
|
return $available[array_rand($available)];
|
|
}
|
|
}
|