138 lines
3.8 KiB
PHP
138 lines
3.8 KiB
PHP
<?php
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namespace Overtrue\Pinyin;
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use InvalidArgumentException;
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use Overtrue\Pinyin\Contracts\ConverterInterface;
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use Overtrue\Pinyin\Converters\CachedConverter;
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use Overtrue\Pinyin\Converters\MemoryOptimizedConverter;
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use Overtrue\Pinyin\Converters\SmartConverter;
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/**
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* Converter 工厂类
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*
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* 提供不同策略的 Converter 实例
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*/
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class ConverterFactory
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{
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public const MEMORY_OPTIMIZED = 'memory';
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public const CACHED = 'cached';
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public const SMART = 'smart';
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/**
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* 默认策略
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*/
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private static string $defaultStrategy = self::MEMORY_OPTIMIZED;
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/**
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* 创建 Converter 实例
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*
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* @param string|null $strategy 策略名称，null 则使用默认策略
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*/
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public static function make(?string $strategy = null): ConverterInterface
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{
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$strategy = $strategy ?? self::$defaultStrategy;
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return match ($strategy) {
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self::MEMORY_OPTIMIZED => new MemoryOptimizedConverter,
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self::CACHED => new CachedConverter,
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self::SMART => new SmartConverter,
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default => throw new InvalidArgumentException("Unknown converter strategy: {$strategy}")
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};
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}
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/**
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* 设置默认策略
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*/
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public static function setDefaultStrategy(string $strategy): void
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{
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if (! in_array($strategy, [self::MEMORY_OPTIMIZED, self::CACHED, self::SMART])) {
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throw new InvalidArgumentException("Invalid strategy: {$strategy}");
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}
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self::$defaultStrategy = $strategy;
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}
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/**
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* 获取当前默认策略
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*/
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public static function getDefaultStrategy(): string
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{
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return self::$defaultStrategy;
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}
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/**
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* 根据场景推荐策略
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*
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* @param array $context 场景上下文
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* @return string 推荐的策略
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*/
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public static function recommend(array $context = []): string
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{
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// Web 请求场景
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if (($context['sapi'] ?? php_sapi_name()) === 'fpm-fcgi') {
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return self::MEMORY_OPTIMIZED;
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}
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// CLI 批处理场景
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if (($context['batch'] ?? false) === true) {
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return self::CACHED;
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}
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// 内存限制场景
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$memoryLimit = ini_get('memory_limit');
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if ($memoryLimit !== '-1' && self::parseBytes($memoryLimit) < 128 * 1024 * 1024) {
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return self::MEMORY_OPTIMIZED;
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}
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// 默认使用智能策略
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return self::SMART;
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}
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/**
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* 获取所有可用策略的信息
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*/
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public static function getStrategiesInfo(): array
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{
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return [
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self::MEMORY_OPTIMIZED => [
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'name' => '内存优化',
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'class' => MemoryOptimizedConverter::class,
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'memory' => '~400KB',
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'speed' => '中等',
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'use_case' => 'Web请求、内存受限环境',
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],
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self::CACHED => [
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'name' => '全缓存',
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'class' => CachedConverter::class,
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'memory' => '~4MB',
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'speed' => '最快',
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'use_case' => '批处理、长时运行进程',
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],
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self::SMART => [
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'name' => '智能',
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'class' => SmartConverter::class,
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'memory' => '600KB-1.5MB',
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'speed' => '快',
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'use_case' => '通用场景、自动优化',
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],
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];
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}
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private static function parseBytes(string $value): int
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{
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$value = trim($value);
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$last = strtolower($value[-1]);
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$value = (int) $value;
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return match ($last) {
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'g' => $value * 1024 * 1024 * 1024,
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'm' => $value * 1024 * 1024,
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'k' => $value * 1024,
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default => $value,
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};
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}
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}
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