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406 lines
14 KiB
PHP
406 lines
14 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think;
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class Loader
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{
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// 类名映射
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protected static $map = [];
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// 命名空间
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protected static $namespace = [];
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// PSR-4
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private static $prefixLengthsPsr4 = [];
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private static $prefixDirsPsr4 = [];
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// PSR-0
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private static $prefixesPsr0 = [];
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// 自动加载
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public static function autoload($class)
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{
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// 检查是否定义类库映射
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if (isset(self::$map[$class])) {
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if (is_file(self::$map[$class])) {
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include self::$map[$class];
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}
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} elseif ($file = self::findFileInComposer($class)) {
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// Composer自动加载
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include $file;
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} else {
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// 命名空间自动加载
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list($name, $class) = explode('\\', $class, 2);
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$name = strtolower($name);
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if (isset(self::$namespace[$name])) {
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// 注册的命名空间
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$path = self::$namespace[$name];
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} elseif (in_array($name, ['think', 'behavior', 'traits']) || is_dir(LIB_PATH . $name)) {
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// 核心类库命名空间
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$path = LIB_PATH . $name . DS;
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} elseif (APP_NAMESPACE == $name) {
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// 项目命名空间
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$path = APP_PATH;
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} elseif (is_dir(EXTEND_PATH . $name)) {
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// 扩展类库命名空间
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$path = EXTEND_PATH . $name . DS;
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} else {
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return;
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}
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$filename = $path . str_replace('\\', DS, $class) . EXT;
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if (is_file($filename)) {
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include $filename;
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} elseif (APP_DEBUG) {
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Log::record(' autoloader error : ' . $filename, 'notic');
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}
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}
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}
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// 注册classmap
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public static function addMap($class, $map = '')
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{
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if (is_array($class)) {
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self::$map = array_merge(self::$map, $class);
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} else {
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self::$map[$class] = $map;
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}
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}
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// 注册命名空间
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public static function addNamespace($namespace, $path)
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{
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self::$namespace[$namespace] = $path;
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}
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// 注册自动加载机制
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public static function register($autoload = '')
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{
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// 注册系统自动加载
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spl_autoload_register($autoload ? $autoload : 'think\\Loader::autoload');
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// 注册composer自动加载
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self::registerComposerLoader();
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}
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// 注册composer自动加载
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private static function registerComposerLoader()
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{
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if (is_file(VENDOR_PATH . 'composer/autoload_namespaces.php')) {
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$map = require VENDOR_PATH . 'composer/autoload_namespaces.php';
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foreach ($map as $namespace => $path) {
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self::$prefixesPsr0[$namespace[0]][$namespace] = (array) $path;
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}
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}
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if (is_file(VENDOR_PATH . 'composer/autoload_psr4.php')) {
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$map = require VENDOR_PATH . 'composer/autoload_psr4.php';
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foreach ($map as $namespace => $path) {
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$length = strlen($namespace);
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if ('\\' !== $namespace[$length - 1]) {
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throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
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}
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self::$prefixLengthsPsr4[$namespace[0]][$namespace] = $length;
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self::$prefixDirsPsr4[$namespace] = (array) $path;
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}
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}
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if (is_file(VENDOR_PATH . 'composer/autoload_classmap.php')) {
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$classMap = require VENDOR_PATH . 'composer/autoload_classmap.php';
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if ($classMap) {
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self::addMap($classMap);
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}
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}
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if (is_file(VENDOR_PATH . 'composer/autoload_files.php')) {
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$includeFiles = require VENDOR_PATH . 'composer/autoload_files.php';
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foreach ($includeFiles as $fileIdentifier => $file) {
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self::composerRequire($fileIdentifier, $file);
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}
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}
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}
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private static function composerRequire($fileIdentifier, $file)
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{
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if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
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require $file;
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$GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
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}
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}
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private static function findFileInComposer($class, $ext = '.php')
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{
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// PSR-4 lookup
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$logicalPathPsr4 = strtr($class, '\\', DS) . $ext;
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$first = $class[0];
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if (isset(self::$prefixLengthsPsr4[$first])) {
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foreach (self::$prefixLengthsPsr4[$first] as $prefix => $length) {
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if (0 === strpos($class, $prefix)) {
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foreach (self::$prefixDirsPsr4[$prefix] as $dir) {
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if (file_exists($file = $dir . DS . substr($logicalPathPsr4, $length))) {
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return $file;
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}
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}
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}
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}
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}
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// PSR-0 lookup
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if (false !== $pos = strrpos($class, '\\')) {
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// namespaced class name
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$logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
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. strtr(substr($logicalPathPsr4, $pos + 1), '_', DS);
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} else {
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// PEAR-like class name
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$logicalPathPsr0 = strtr($class, '_', DS) . $ext;
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}
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if (isset(self::$prefixesPsr0[$first])) {
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foreach (self::$prefixesPsr0[$first] as $prefix => $dirs) {
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if (0 === strpos($class, $prefix)) {
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foreach ($dirs as $dir) {
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if (file_exists($file = $dir . DS . $logicalPathPsr0)) {
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return $file;
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}
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}
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}
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}
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}
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// Remember that this class does not exist.
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return self::$map[$class] = false;
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}
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/**
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* 导入所需的类库 同java的Import 本函数有缓存功能
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* @param string $class 类库命名空间字符串
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* @param string $baseUrl 起始路径
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* @param string $ext 导入的文件扩展名
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* @return boolean
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*/
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public static function import($class, $baseUrl = '', $ext = EXT)
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{
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static $_file = [];
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$class = str_replace(['.', '#'], ['/', '.'], $class);
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if (isset($_file[$class . $baseUrl])) {
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return true;
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} else {
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$_file[$class . $baseUrl] = true;
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}
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$class_strut = explode('/', $class);
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if (empty($baseUrl)) {
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if ('@' == $class_strut[0] || MODULE_NAME == $class_strut[0]) {
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//加载当前项目应用类库
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$class = substr_replace($class, '', 0, strlen($class_strut[0]) + 1);
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$baseUrl = MODULE_PATH;
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} elseif (in_array($class_strut[0], ['traits', 'think', 'behavior', 'org', 'com'])) {
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// org 第三方公共类库 com 企业公共类库
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$baseUrl = LIB_PATH;
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} elseif (in_array($class_strut[0], ['vendor'])) {
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$baseUrl = THINK_PATH;
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} else {
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// 加载其他项目应用类库
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$class = substr_replace($class, '', 0, strlen($class_strut[0]) + 1);
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$baseUrl = APP_PATH . $class_strut[0] . DS;
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}
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}
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if (substr($baseUrl, -1) != DS) {
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$baseUrl .= DS;
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}
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// 如果类存在 则导入类库文件
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$filename = $baseUrl . $class . $ext;
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if (is_file($filename)) {
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include $filename;
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return true;
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}
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return false;
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}
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/**
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* 实例化一个没有模型文件的Model（对应数据表）
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* @param string $name Model名称 支持指定基础模型 例如 MongoModel:User
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* @param array $options 模型参数
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* @return Model
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*/
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public static function table($name = '', $options = [])
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{
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static $_model = [];
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if (strpos($name, ':')) {
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list($class, $name) = explode(':', $name);
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} else {
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$class = 'think\\Model';
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}
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$guid = $name . '_' . $class;
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if (!isset($_model[$guid])) {
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$_model[$guid] = new $class($name, $options);
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}
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return $_model[$guid];
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}
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/**
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* 实例化（分层）模型
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* @param string $name Model名称
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* @param string $layer 业务层名称
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* @return Object
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*/
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public static function model($name = '', $layer = MODEL_LAYER)
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{
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if (empty($name)) {
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return new Model;
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}
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static $_model = [];
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if (isset($_model[$name . $layer])) {
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return $_model[$name . $layer];
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}
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if (strpos($name, '/')) {
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list($module, $name) = explode('/', $name, 2);
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} else {
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$module = MODULE_NAME;
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}
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$class = self::parseClass($module, $layer, $name);
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$name = basename($name);
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if (class_exists($class)) {
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$model = new $class($name);
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} else {
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$class = str_replace('\\' . $module . '\\', '\\' . COMMON_MODULE . '\\', $class);
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if (class_exists($class)) {
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$model = new $class($name);
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} else {
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Log::record('实例化不存在的类：' . $class, 'notic');
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$model = new Model($name);
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}
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}
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$_model[$name . $layer] = $model;
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return $model;
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}
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/**
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* 实例化（分层）控制器 格式：[模块名/]控制器名
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* @param string $name 资源地址
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* @param string $layer 控制层名称
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* @param string $empty 空控制器名称
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* @return Object|false
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*/
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public static function controller($name, $layer = '', $empty = '')
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{
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static $_instance = [];
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$layer = $layer ?: CONTROLLER_LAYER;
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if (isset($_instance[$name . $layer])) {
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return $_instance[$name . $layer];
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}
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if (strpos($name, '/')) {
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list($module, $name) = explode('/', $name);
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} else {
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$module = MODULE_NAME;
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}
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$class = self::parseClass($module, $layer, $name);
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if (class_exists($class)) {
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$action = new $class;
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$_instance[$name . $layer] = $action;
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return $action;
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} elseif ($empty && class_exists($class = self::parseClass($module, $layer, $empty))) {
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return new $class;
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} else {
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return false;
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}
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}
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/**
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* 实例化数据库
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* @param mixed $config 数据库配置
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* @param boolean $lite 是否采用lite方式连接
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* @return object
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*/
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public static function db($config, $lite = false)
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{
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return Db::instance($config, $lite);
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}
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/**
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* 远程调用模块的操作方法 参数格式 [模块/控制器/]操作
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* @param string $url 调用地址
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* @param string|array $vars 调用参数 支持字符串和数组
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* @param string $layer 要调用的控制层名称
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* @return mixed
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*/
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public static function action($url, $vars = [], $layer = CONTROLLER_LAYER)
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{
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$info = pathinfo($url);
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$action = $info['basename'];
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$module = '.' != $info['dirname'] ? $info['dirname'] : CONTROLLER_NAME;
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$class = self::controller($module, $layer);
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if ($class) {
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if (is_string($vars)) {
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parse_str($vars, $vars);
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}
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return call_user_func_array([ & $class, $action . Config::get('action_suffix')], $vars);
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} else {
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return false;
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}
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}
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/**
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* 取得对象实例 支持调用类的静态方法
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*
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* @param string $class 对象类名
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* @param string $method 类的静态方法名
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*
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* @return mixed
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* @throws Exception
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*/
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public static function instance($class, $method = '')
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{
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static $_instance = [];
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$identify = $class . $method;
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if (!isset($_instance[$identify])) {
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if (class_exists($class)) {
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$o = new $class();
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if (!empty($method) && method_exists($o, $method)) {
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$_instance[$identify] = call_user_func_array([ & $o, $method], []);
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} else {
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$_instance[$identify] = $o;
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}
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} else {
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throw new Exception('class not exist :' . $class, 10007);
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}
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}
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return $_instance[$identify];
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}
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/**
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* 字符串命名风格转换
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* type 0 将Java风格转换为C的风格 1 将C风格转换为Java的风格
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* @param string $name 字符串
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* @param integer $type 转换类型
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* @return string
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*/
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public static function parseName($name, $type = 0)
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{
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if ($type) {
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return ucfirst(preg_replace_callback('/_([a-zA-Z])/', function ($match) {return strtoupper($match[1]);}, $name));
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} else {
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return strtolower(trim(preg_replace("/[A-Z]/", "_\\0", $name), "_"));
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}
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}
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/**
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* 解析应用类的类名
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* @param string $module 模块名
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* @param string $layer 层名 controller model ...
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* @param string $name 类名
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* @return string
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*/
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public static function parseClass($module, $layer, $name)
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{
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return APP_NAMESPACE . '\\' . (APP_MULTI_MODULE ? $module . '\\' : '') . $layer . '\\' . self::parseName(str_replace('/', '\\', $name), 1);
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}
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}
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