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zhamao-framework/src/ZM/Annotation/AnnotationParser.php

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<?php
declare(strict_types=1);
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namespace ZM\Annotation;
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use Doctrine\Common\Annotations\AnnotationReader;
use Koriym\Attributes\AttributeReader;
use Koriym\Attributes\DualReader;
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use ReflectionMethod;
use ZM\Annotation\Http\Controller;
use ZM\Annotation\Http\Route;
use ZM\Annotation\Interfaces\ErgodicAnnotation;
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use ZM\Annotation\Interfaces\Level;
use ZM\Annotation\Middleware\Middleware;
use ZM\Exception\ConfigException;
use ZM\Store\FileSystem;
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use ZM\Utils\HttpUtil;
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/**
* 注解解析器
*/
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class AnnotationParser
{
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/**
* @var array 要解析的路径列表
*/
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private $path_list = [];
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/**
* @var float 用于计算解析时间用的
*/
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private $start_time;
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/**
* @var array 用于解析的注解解析树,格式见下方的注释
*/
private $annotation_tree = [];
/**
* @var array 用于生成"类-方法"对应"注解列表"的数组
*/
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private $annotation_map = [];
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/**
* @var array 特殊的注解解析器回调列表
*/
private $special_parsers = [];
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/**
* AnnotationParser constructor.
*/
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public function __construct(bool $with_internal_parsers = true)
{
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$this->start_time = microtime(true);
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if ($with_internal_parsers) {
$this->special_parsers = [
Middleware::class => [function (Middleware $middleware) { \middleware()->bindMiddleware([resolve($middleware->class), $middleware->method], $middleware->name, $middleware->params); }],
Route::class => [[$this, 'addRouteAnnotation']],
];
}
}
/**
* 设置自定义的注解解析方法
*
* @param string $class_name 注解类名
* @param callable $callback 回调函数
*/
public function addSpecialParser(string $class_name, callable $callback)
{
$this->special_parsers[$class_name][] = $callback;
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}
/**
* 注册各个模块类的注解和模块level的排序
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*
* @throws \ReflectionException
* @throws ConfigException
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*/
public function parseAll()
{
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// 对每个设置的路径依次解析
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foreach ($this->path_list as $path) {
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logger()->debug('parsing annotation in ' . $path[0] . ':' . $path[1]);
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// 首先获取路径下所有的类(通过 PSR-4 标准解析)
$all_class = FileSystem::getClassesPsr4($path[0], $path[1]);
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// 读取配置文件中配置的忽略解析的注解名,防止误解析一些别的地方需要的注解,比如@mixin
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$conf = config('global.runtime.annotation_reader_ignore');
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// 有两种方式,第一种是通过名称,第二种是通过命名空间
if (isset($conf['name']) && is_array($conf['name'])) {
foreach ($conf['name'] as $v) {
AnnotationReader::addGlobalIgnoredName($v);
}
}
if (isset($conf['namespace']) && is_array($conf['namespace'])) {
foreach ($conf['namespace'] as $v) {
AnnotationReader::addGlobalIgnoredNamespace($v);
}
}
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// 因为mixin常用且框架默认不需要解析则全局忽略
AnnotationReader::addGlobalIgnoredName('mixin');
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// 声明一个既可以解析注解又可以解析Attribute的双reader来读取注解和Attribute
$reader = new DualReader(new AnnotationReader(), new AttributeReader());
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foreach ($all_class as $v) {
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logger()->debug('正在检索 ' . $v);
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// 通过反射实现注解读取
$reflection_class = new \ReflectionClass($v);
$methods = $reflection_class->getMethods(\ReflectionMethod::IS_PUBLIC);
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$class_annotations = $reader->getClassAnnotations($reflection_class);
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// 这段为新加的:start
// 这里将每个类里面所有的类注解、方法注解通通加到一颗大树上,后期解析
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/*
$annotation_map: {
Module\Example\Hello: {
class_annotations: [
注解对象1, 注解对象2, ...
],
methods: [
ReflectionMethod, ReflectionMethod, ...
],
methods_annotations: {
foo: [ 注解对象1, 注解对象2, ... ],
bar: [ 注解对象1, 注解对象2, ... ],
}
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}
}
*/
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// 保存对class的注解
$this->annotation_tree[$v]['class_annotations'] = $class_annotations;
// 保存类成员的方法的对应反射对象们
$this->annotation_tree[$v]['methods'] = $methods;
// 保存对每个方法获取到的注解们
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foreach ($methods as $method) {
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$this->annotation_tree[$v]['methods_annotations'][$method->getName()] = $reader->getMethodAnnotations($method);
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}
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// 因为适用于类的注解有一些比较特殊,比如有向下注入的,有控制行为的,所以需要遍历一下下放到方法里
foreach ($this->annotation_tree[$v]['class_annotations'] as $vs) {
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$vs->class = $v;
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// 预处理0排除所有非继承于 AnnotationBase 的注解
if (!$vs instanceof AnnotationBase) {
logger()->notice(get_class($vs) . ' is not extended from ' . AnnotationBase::class);
continue;
}
// 预处理1如果类包含了@Closed注解则跳过这个类
if ($vs instanceof Closed) {
unset($this->annotation_tree[$v]);
continue 2;
}
// 预处理2将适用于每一个函数的注解到类注解重新注解到每个函数下面
if ($vs instanceof ErgodicAnnotation) {
foreach (($this->annotation_tree[$v]['methods'] ?? []) as $method) {
// 用 clone 的目的是生成个独立的对象,避免和 class 以及方法之间互相冲突
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$copy = clone $vs;
$copy->method = $method->getName();
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$this->annotation_tree[$v]['methods_annotations'][$method->getName()][] = $copy;
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}
}
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// 预处理3调用自定义解析器
foreach (($this->special_parsers[get_class($vs)] ?? []) as $parser) {
$result = $parser($vs);
if ($result === true) {
continue 2;
}
if ($result === false) {
continue 3;
}
}
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}
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// 预处理3处理每个函数上面的特殊注解就是需要操作一些东西的
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foreach (($this->annotation_tree[$v]['methods_annotations'] ?? []) as $method_name => $methods_annotations) {
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foreach ($methods_annotations as $method_anno) {
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// 预处理3.0:排除所有非继承于 AnnotationBase 的注解
if (!$method_anno instanceof AnnotationBase) {
logger()->notice('Binding annotation ' . get_class($method_anno) . ' to ' . $v . '::' . $method_name . ' is not extended from ' . AnnotationBase::class);
continue;
}
// 预处理3.1:给所有注解对象绑定当前的类名和方法名
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$method_anno->class = $v;
$method_anno->method = $method_name;
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// 预处理3.2:如果包含了@Closed注解则跳过这个方法的注解解析
if ($method_anno instanceof Closed) {
unset($this->annotation_tree[$v]['methods_annotations'][$method_name]);
continue 2;
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}
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// 预处理3.3:调用自定义解析器
foreach (($this->special_parsers[get_class($method_anno)] ?? []) as $parser) {
$result = $parser($method_anno);
if ($result === true) {
continue 2;
}
if ($result === false) {
continue 3;
}
}
// 如果上方没有解析或返回了 true则添加到注解解析列表中
$this->annotation_map[$v][$method_name][] = $method_anno;
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}
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}
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}
}
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logger()->debug('解析注解完毕!');
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}
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/**
* 生成排序后的注解列表
*/
public function generateAnnotationList(): array
{
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$o = [];
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foreach ($this->annotation_tree as $obj) {
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// 这里的ErgodicAnnotation是为了解决类上的注解可穿透到方法上的问题
foreach (($obj['class_annotations'] ?? []) as $class_annotation) {
if ($class_annotation instanceof ErgodicAnnotation) {
continue;
}
$o[get_class($class_annotation)][] = $class_annotation;
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}
foreach (($obj['methods_annotations'] ?? []) as $methods_annotations) {
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foreach ($methods_annotations as $annotation) {
$o[get_class($annotation)][] = $annotation;
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}
}
}
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foreach ($o as $k => $v) {
$this->sortByLevel($o, $k);
}
return $o;
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}
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/**
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* 添加解析的路径
*
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* @param string $path 注册解析注解的路径
* @param string $indoor_name 起始命名空间的名称
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*/
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public function addRegisterPath(string $path, string $indoor_name)
{
logger()->debug('Add register path: ' . $path . ' => ' . $indoor_name);
$this->path_list[] = [$path, $indoor_name];
}
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/**
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* 排序注解列表
*
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* @param array $events 需要排序的
* @param string $class_name 排序的类名
* @param string $prefix 前缀
* @internal 用于 level 排序
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*/
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public function sortByLevel(array &$events, string $class_name, string $prefix = '')
{
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if (is_a($class_name, Level::class, true)) {
$class_name .= $prefix;
usort($events[$class_name], function ($a, $b) {
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$left = $a->getLevel();
$right = $b->getLevel();
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return $left > $right ? -1 : ($left == $right ? 0 : 1);
});
}
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}
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/**
* 获取解析器调用的时间(秒)
*/
public function getUsedTime(): float
{
return microtime(true) - $this->start_time;
}
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/**
* 获取注解的注册map
*/
public function getAnnotationMap(): array
{
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return $this->annotation_map;
}
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/**
* 添加注解路由
*/
private function addRouteAnnotation(Route $vss)
{
// 拿到所属方法的类上面有没有控制器的注解
$prefix = '';
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foreach (($this->annotation_tree[$vss->class]['methods_annotations'][$vss->method] ?? []) as $annotation) {
if ($annotation instanceof Controller) {
$prefix = $annotation->prefix;
break;
}
}
$tail = trim($vss->route, '/');
$route_name = $prefix . ($tail === '' ? '' : '/') . $tail;
logger()->debug('添加路由:' . $route_name);
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$route = new \Symfony\Component\Routing\Route($route_name, ['_class' => $vss->class, '_method' => $vss->method]);
$route->setMethods($vss->request_method);
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HttpUtil::getRouteCollection()->add(md5($route_name), $route);
}
}