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Library.class.php
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Library.class.php
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<?php
require_once($_ENV['dir.recess'] . 'recess/diagnostics/Diagnostics.class.php');
require_once($_ENV['dir.recess'] . 'recess/cache/Cache.class.php');
/**
* Library is an important low level utility in Recess used to make importing class files
* less painful. Library is also an important level of indirection between PHP's native
* include/require functions. Library is how Recess dynamically 'compiles' all classes
* into a single PHP file.
*
* @author Kris Jordan <krisjordan@gmail.com>
* @copyright 2008, 2009 Kris Jordan
* @package Recess PHP Framework
* @license MIT
* @link http://www.recessframework.org/
*
* @todo Allow framework to register packages/shortcuts? i.e.: Library::import('recess.framework.models.Model') vs. Library::import('recess','Model')
*/
abstract class Library {
static private $classesByClass = array(); // = array( 'Inflector' => array( 'recess.lang.Inflector', 0 );
static private $classesByFull = array(); // 'recess.lang.Inflector'
static private $dirtyClasses = false;
static private $paths = array();
static private $dirtyPaths = false;
static private $loaded = array('Libary' => true);
const dotSeparator = '.';
const pathSeparator = '/';
const CLASSES_X_CLASS_CACHE_KEY = 'Recess::*::Library::$classesByClass';
const CLASSES_X_FULL_CACHE_KEY = 'Recess::*::Library::$classesByFull';
const PATHS_CACHE_KEY = 'Recess::*::Library::$paths';
const NAMED_RUNS_PATH = '';
const PHP_EXTENSION = '.php';
const CLASS_FILE_EXTENSION = '.class.php';
const CLASS_FILE_EXTENSION_LENGTH = 10;
const NAME = 0;
const PATH = 1;
static public $useNamedRuns = false;
static private $namedRun;
static private $namedRuns = array();
static private $inNamedRunImport = false;
static private $namedRunFileSize = 0;
static function beginNamedRun($name) {
if(!self::$useNamedRuns || !isset($_ENV['dir.temp'])) return;
self::$namedRun = $name;
if(!isset(self::$namedRuns[$name])) {
self::$namedRuns[$name] = array();
} else {
if(!is_array(self::$namedRuns[$name])) {
self::$namedRuns[$name] = array();
}
}
$namedRunFile = $_ENV['dir.temp'] . self::NAMED_RUNS_PATH . $name . self::PHP_EXTENSION;
if(file_exists($namedRunFile)) {
self::$inNamedRunImport = true;
include($namedRunFile);
self::$namedRunFileSize = filesize($namedRunFile);
self::$inNamedRunImport = false;
}
}
static function namedRunMissed($class) {
if($class != 'Smarty')
self::$namedRuns[self::$namedRun][] = $class;
}
static function persistNamedRuns() {
if(!isset($_ENV['dir.temp'])) return;
$tempDir = $_ENV['dir.temp'];
foreach(self::$namedRuns as $namedRun => $missedClasses) {
$namedRunDir = $_ENV['dir.temp'] . self::NAMED_RUNS_PATH;
$namedRunFile = $namedRunDir . $namedRun . self::PHP_EXTENSION;
if(!empty($missedClasses)) {
$tempNamedRunFile = '';
$tries = 0;
do {
$tempNamedRunFile = $namedRunFile . '.' . rand(0,32768);
} while(file_exists($tempNamedRunFile));
if(file_exists($namedRunFile)) {
copy($namedRunFile, $tempNamedRunFile);
$file = fopen($tempNamedRunFile,'a');
if(filesize($tempNamedRunFile) !== self::$namedRunFileSize) {
fclose($file);
unlink($tempNamedRunFile);
return;
}
} else {
if(!file_exists($namedRunDir)) {
mkdir($tempNamedRunFile);
}
$file = fopen($tempNamedRunFile,'w');
}
foreach($missedClasses as $class) {
$classInfo = self::$classesByClass[$class];
$fullName = $classInfo[self::NAME];
$path = self::$paths[$classInfo[self::PATH]];
$fileName = str_replace(self::dotSeparator,self::pathSeparator, $fullName) . self::CLASS_FILE_EXTENSION;
$classFile = $path . $fileName;
$code = rtrim(file_get_contents($classFile));
if(substr($code,-2)!='?'.'>') $code .= ('?'.'>');
fwrite($file, $code);
}
fclose($file);
copy($tempNamedRunFile, $namedRunFile);
unlink($tempNamedRunFile);
}
}
}
static function init() {
$paths = Cache::get(self::PATHS_CACHE_KEY);
if($paths !== false) self::$paths = $paths;
$classesByClass = Cache::get(self::CLASSES_X_CLASS_CACHE_KEY);
if($classesByClass !== false) self::$classesByClass = $classesByClass;
$classesByFull = Cache::get(self::CLASSES_X_FULL_CACHE_KEY);
if($classesByFull !== false) self::$classesByFull = $classesByFull;
self::$dirtyPaths = false;
self::$dirtyClasses = false;
}
static function shutdown() {
if(self::$dirtyPaths) {
Cache::set(self::PATHS_CACHE_KEY, self::$paths);
}
if(self::$dirtyClasses) {
Cache::set(self::CLASSES_X_CLASS_CACHE_KEY, self::$classesByClass);
Cache::set(self::CLASSES_X_FULL_CACHE_KEY, self::$classesByFull);
}
self::persistNamedRuns();
}
static function addClassPath($newPath) {
if(!in_array($newPath, self::$paths)) {
self::$paths[] = $newPath;
self::$dirtyPaths = true;
}
}
static function addClass($fullName) {
$className = self::getClassName($fullName);
self::$classesByFull[$fullName] = $className;
self::$classesByClass[$className] = array( $fullName, -1 );
}
static function import($fullName, $forceLoad = false) {
if(!isset(self::$classesByFull[$fullName])) {
self::addClass($fullName);
}
$className = self::$classesByFull[$fullName];
if(!isset(self::$loaded[$className])) {
self::$loaded[$className] = false;
}
if($forceLoad) {
self::load($className);
}
}
static function importAndInstantiate($fullName) {
// TODO: REDUCE DUPLICATION WITH IMPORT
if(isset(self::$classesByFull[$fullName])) {
$className = self::$classesByFull[$fullName];
} else {
$className = self::getClassName($fullName);
self::addClass($fullName, $className);
}
if(!isset(self::$loaded[$className])) {
self::$loaded[$className] = false;
}
return new $className;
}
static function classExists($fullName) {
if(!isset(self::$classesByFull[$fullName])) {
self::addClass($fullName);
}
$class = self::$classesByFull[$fullName];
if(class_exists($class, false) || interface_exists($class, false)) return true;
$pathIndex = self::$classesByClass[$class][self::PATH];
$file = str_replace(self::dotSeparator,self::pathSeparator, $fullName) . self::CLASS_FILE_EXTENSION;
if($pathIndex == -1) {
for($index = count(self::$paths) - 1; $index >= 0 ; $index--) {
$path = self::$paths[$index];
if(file_exists($path . $file)) {
include($path . $file);
if(class_exists($class, false) || interface_exists($class, false)) {
if(isset(self::$namedRun)) { self::namedRunMissed($class); }
self::$dirtyClasses = true;
self::$classesByClass[$class][self::PATH] = $index;
self::$loaded[$class] = true;
return true;
}
}
}
return false;
} else {
$path = self::$paths[$pathIndex] . $file;
include_once($path);
self::$loaded[$class] = true;
}
if(isset(self::$namedRun)) { self::namedRunMissed($class); }
return class_exists($class, false) || interface_exists($class, false);
}
static function load($className) {
if(self::$inNamedRunImport) return;
if(!isset(self::$loaded[$className])) {
throw new LibraryException($className . ' has not been imported.');
}
if(self::$loaded[$className]) { return; }
// Search through paths to find requested file
if(class_exists($className, false) || self::classExists(self::$classesByClass[$className][self::NAME])) {
return;
} else {
// Could not load the desired class
$paths = '';
foreach(self::$paths as $path) {
$paths .= $path . '<br />';
}
throw new LibraryException('Library cannot find class "' . self::$classesByClass[$className][self::NAME] . '". Searched in: <br />' . $paths);
}
}
static function getClassName($fullName) {
if(isset(self::$classesByFull[$fullName])) {
return self::$classesByFull[$fullName];
}
$lastDotPosition = strrpos($fullName, self::dotSeparator);
if($lastDotPosition === false) {
self::$classesByFull[$fullName] = $fullName;
return $fullName;
} else {
$className = substr($fullName, $lastDotPosition + 1);
self::$classesByFull[$fullName] = $className;
return $className;
}
}
static function getPackage($className) {
if(isset(self::$classesByClass[$className])) {
return str_replace('.' . $className, '', self::$classesByClass[$className][self::NAME]);
} else {
return '';
}
}
static function getFullyQualifiedClassName($className) {
if(isset(self::$classesByClass[$className])) {
return self::$classesByClass[$className][self::NAME];
} else {
return $className;
}
}
static function findClassesIn($package) {
$package = str_replace(self::dotSeparator,self::pathSeparator, $package);
$classes = array();
foreach(self::$paths as $path) {
if(file_exists($path . self::pathSeparator . $package)) {
$dir = dir($path . self::pathSeparator . $package);
while(false !== ($entry = $dir->read())) {
$extensionPosition = strpos($entry, self::CLASS_FILE_EXTENSION);
if($extensionPosition === strlen($entry) - self::CLASS_FILE_EXTENSION_LENGTH) {
$classes[] = substr($entry, 0, $extensionPosition);
}
}
}
}
return $classes;
}
}
function __autoload($class) {
try {
Library::load($class);
} catch (Exception $exception) {
Diagnostics::handleException($exception);
die('Could not autoload ' . $class);
}
}
class Make {
static private $classes = array();
static function a($class) { $args = func_get_args(); return self::makeByArray($args); }
static function an($class) { $args = func_get_args(); return self::makeByArray($args); }
static private function makeByArray($args) {
$class = array_shift($args);
if($class != null) {
if(!isset(self::$classes[$class])) {
self::$classes[$class] = new ReflectionClass($class);
}
return self::$classes[$class]->newInstanceArgs($args);
}
}
}
register_shutdown_function(array('Library','shutdown'));
class LibraryException extends ErrorException {}
?>