File Source for Dwoo.php

<?php
define('DWOO_DIRECTORY', dirname(__FILE__) . DIRECTORY_SEPARATOR);
// TODO BC Checks, remove
if (defined('DWOO_CACHE_DIRECTORY'))
throw new Dwoo_Exception('DWOO_CACHE_DIRECTORY is deprecated, you should now set this in Dwoo\'s constructor using new Dwoo([ $compileDir [, $cacheDir ]])');
if (defined('DWOO_COMPILE_DIRECTORY'))
throw new Dwoo_Exception('DWOO_COMPILE_DIRECTORY is deprecated, you should now set this in Dwoo\'s constructor using new Dwoo([ $compileDir [, $cacheDir ]])');
if (defined('DWOO_CHMOD')) {
throw new Dwoo_Exception('DWOO_CHMOD is deprecated, you should now set this on your template object using $tpl->setChmod('.DWOO_CHMOD.');');
}
// end
/**
* main dwoo class, allows communication between the compiler, template and data classes
*
* <pre>
* requirements :
* php 5.2.0 or above
* SPL and PCRE extensions (for php versions prior to 5.3.0)
* mbstring extension for some string manipulation plugins (especially if you intend to use UTF-8)
* recommended :
* hash extension (for Dwoo_Template_String - minor performance boost)
*
* project created :
* 2008-01-05
* </pre>
*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from the use of this software.
*
* This file is released under the LGPL
* "GNU Lesser General Public License"
* More information can be found here:
* {@link http://www.gnu.org/copyleft/lesser.html}
*
* @author Jordi Boggiano <j.boggiano@seld.be>
* @copyright Copyright (c) 2008, Jordi Boggiano
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
* @link http://dwoo.org/
* @version 0.9.2
* @date 2008-06-28
* @package Dwoo
*/
class Dwoo
{
/**
* current version number
*
* @var string
*/
const VERSION = "1.0.0beta";
/**
* unique number of this dwoo release
*
* this can be used by templates classes to check whether the compiled template
* has been compiled before this release or not, so that old templates are
* recompiled automatically when Dwoo is updated
*/
const RELEASE_TAG = 13;
/**#@+
* constants that represents all plugin types
*
* these are bitwise-operation-safe values to allow multiple types
* on a single plugin
*
* @var int
*/
const CLASS_PLUGIN = 1;
const FUNC_PLUGIN = 2;
const NATIVE_PLUGIN = 4;
const BLOCK_PLUGIN = 8;
const COMPILABLE_PLUGIN = 16;
const CUSTOM_PLUGIN = 32;
const SMARTY_MODIFIER = 64;
const SMARTY_BLOCK = 128;
const SMARTY_FUNCTION = 256;
const PROXY_PLUGIN = 512;
/**#@-*/
/**
* character set of the template, used by string manipulation plugins
*
* it must be lowercase, but setCharset() will take care of that
*
* @see setCharset
* @see getCharset
* @var string
*/
protected $charset = 'utf-8';
/**
* global variables that are accessible through $dwoo.* in the templates
*
* default values include:
*
* $dwoo.version - current version number
* $dwoo.ad - a Powered by Dwoo link pointing to dwoo.org
* $dwoo.now - the current time
* $dwoo.template - the current template filename
* $dwoo.charset - the character set used by the template
*
* on top of that, foreach and other plugins can store special values in there,
* see their documentation for more details.
*
* @var array
*/
protected $globals;
/**
* directory where the compiled templates are stored
*
* defaults to DWOO_COMPILEDIR (= dwoo_dir/compiled by default)
*
* @var string
*/
protected $compileDir;
/**
* directory where the cached templates are stored
*
* defaults to DWOO_CACHEDIR (= dwoo_dir/cache by default)
*
* @var string
*/
protected $cacheDir;
/**
* defines how long (in seconds) the cached files must remain valid
*
* can be overriden on a per-template basis
*
* -1 = never delete
* 0 = disabled
* >0 = duration in seconds
*
* @var int
*/
protected $cacheTime = 0;
/**
* security policy object
*
* @var Dwoo_Security_Policy
*/
protected $securityPolicy = null;
/**
* stores the custom plugins callbacks
*
* @see addPlugin
* @see removePlugin
* @var array
*/
protected $plugins = array();
/**
* stores the filter callbacks
*
* @see addFilter
* @see removeFilter
* @var array
*/
protected $filters = array();
/**
* stores the resource types and associated
* classes / compiler classes
*
* @var array
*/
protected $resources = array
(
'file' => array
(
'class' => 'Dwoo_Template_File',
'compiler' => null
),
'string' => array
(
'class' => 'Dwoo_Template_String',
'compiler' => null
)
);
/**
* the dwoo loader object used to load plugins by this dwoo instance
*
* @var Dwoo_ILoader
*/
protected $loader = null;
/**
* currently rendered template, set to null when not-rendering
*
* @var Dwoo_ITemplate
*/
protected $template = null;
/**
* stores the instances of the class plugins during template runtime
*
* @var array
*/
protected $runtimePlugins;
/**
* stores the data during template runtime
*
* @var array
*/
protected $data;
/**
* stores the current scope during template runtime
*
* @var mixed
*/
protected $scope;
/**
* stores the scope tree during template runtime
*
* @var array
*/
protected $scopeTree;
/**
* stores the block plugins stack during template runtime
*
* @var array
*/
protected $stack;
/**
* stores the current block plugin at the top of the stack during template runtime
*
* @var Dwoo_Block_Plugin
*/
protected $curBlock;
/**
* stores the output buffer during template runtime
*
* @var string
*/
protected $buffer;
/**
* stores plugin proxy
*
* @var Dwoo_IPluginProxy
*/
protected $pluginProxy;
/**
* constructor, sets the cache and compile dir to the default values if not provided
*
* @param string $compileDir path to the compiled directory, defaults to lib/compiled
* @param string $cacheDir path to the cache directory, defaults to lib/cache
*/
public function __construct($compileDir = null, $cacheDir = null)
{
if ($cacheDir === null) {
$this->cacheDir = dirname(__FILE__).DIRECTORY_SEPARATOR.'cache'.DIRECTORY_SEPARATOR;
} else {
$this->cacheDir = $cacheDir.DIRECTORY_SEPARATOR;
}
if ($compileDir === null) {
$this->compileDir = dirname(__FILE__).DIRECTORY_SEPARATOR.'compiled'.DIRECTORY_SEPARATOR;
} else {
$this->compileDir = $compileDir.DIRECTORY_SEPARATOR;
}
if (is_writable($this->cacheDir) === false)
throw new Dwoo_Exception('Dwoo cache directory must be writable, chmod "'.$this->cacheDir.'" to make it writable');
if (is_writable($this->compileDir) === false)
throw new Dwoo_Exception('Dwoo compile directory must be writable, chmod "'.$this->compileDir.'" to make it writable');
}
/**
* resets some runtime variables to allow a cloned object to be used to render sub-templates
*/
public function __clone()
{
$this->template = null;
}
/**
* outputs the template instead of returning it, this is basically a shortcut for get(*, *, *, true)
*
* @see get
* @param mixed $tpl template, can either be a Dwoo_ITemplate object (i.e. Dwoo_Template_File), a valid path to a template, or
* a template as a string it is recommended to provide a Dwoo_ITemplate as it will probably make things faster,
* especially if you render a template multiple times
* @param mixed $data the data to use, can either be a Dwoo_IDataProvider object (i.e. Dwoo_Data) or an associative array. if you're
* rendering the template from cache, it can be left null
* @param Dwoo_ICompiler $compiler the compiler that must be used to compile the template, if left empty a default
* Dwoo_Compiler will be used.
* @return string nothing or the template output if $output is true
*/
public function output($tpl, $data = array(), Dwoo_ICompiler $compiler = null)
{
return $this->get($tpl, $data, $compiler, true);
}
/**
* returns the given template rendered using the provided data and optional compiler
*
* @param mixed $tpl template, can either be a Dwoo_ITemplate object (i.e. Dwoo_Template_File), a valid path to a template, or
* a template as a string it is recommended to provide a Dwoo_ITemplate as it will probably make things faster,
* especially if you render a template multiple times
* @param mixed $data the data to use, can either be a Dwoo_IDataProvider object (i.e. Dwoo_Data) or an associative array. if you're
* rendering the template from cache, it can be left null
* @param Dwoo_ICompiler $compiler the compiler that must be used to compile the template, if left empty a default
* Dwoo_Compiler will be used.
* @param bool $output flag that defines whether the function returns the output of the template (false, default) or echoes it directly (true)
* @return string nothing or the template output if $output is true
*/
public function get($_tpl, $data = array(), $_compiler = null, $_output = false)
{
// a render call came from within a template, so we need a new dwoo instance in order to avoid breaking this one
if ($this->template instanceof Dwoo_ITemplate) {
$proxy = clone $this;
return $proxy->get($_tpl, $data, $_compiler, $_output);
}
// auto-create template if required
if ($_tpl instanceof Dwoo_ITemplate) {
// valid, skip
} elseif (is_string($_tpl) && file_exists($_tpl)) {
$_tpl = new Dwoo_Template_File($_tpl);
} else {
throw new Dwoo_Exception('Dwoo->get/Dwoo->output\'s first argument must be a Dwoo_ITemplate (i.e. Dwoo_Template_File) or a valid path to a template file', E_USER_NOTICE);
}
// save the current template, enters render mode at the same time
// if another rendering is requested it will be proxied to a new Dwoo instance
$this->template = $_tpl;
// load data
if ($data instanceof Dwoo_IDataProvider) {
$this->data = $data->getData();
} elseif (is_array($data)) {
$this->data = $data;
} else {
throw new Dwoo_Exception('Dwoo->get/Dwoo->output\'s data argument must be a Dwoo_IDataProvider object (i.e. Dwoo_Data) or an associative array', E_USER_NOTICE);
}
$this->initGlobals($_tpl);
$this->initRuntimeVars($_tpl);
// try to get cached template
$file = $_tpl->getCachedTemplate($this);
$doCache = $file === true;
$cacheLoaded = is_string($file);
if ($cacheLoaded === true) {
// cache is present, run it
if ($_output === true) {
include $file;
$this->template = null;
} else {
ob_start();
include $file;
$this->template = null;
return ob_get_clean();
}
} else {
// no cache present
if ($doCache === true) {
$dynamicId = uniqid();
}
// render template
$out = include $_tpl->getCompiledTemplate($this, $_compiler);
// template returned false so it needs to be recompiled
if ($out === false) {
$_tpl->forceCompilation();
$out = include $_tpl->getCompiledTemplate($this, $_compiler);
}
if ($doCache === true) {
$out = preg_replace('/(<%|%>|<\?php|<\?|\?>)/', '<?php /*'.$dynamicId.'*/ echo \'$1\'; ?>', $out);
if (!class_exists('Dwoo_plugin_dynamic', false)) {
$this->getLoader()->loadPlugin('dynamic');
}
$out = Dwoo_Plugin_dynamic::unescape($out, $dynamicId);
}
// process filters
foreach ($this->filters as $filter) {
if (is_array($filter) && $filter[0] instanceof Dwoo_Filter) {
$out = call_user_func($filter, $out);
} else {
$out = call_user_func($filter, $this, $out);
}
}
if ($doCache === true) {
// building cache
$file = $_tpl->cache($this, $out);
// run it from the cache to be sure dynamics are rendered
if ($_output === true) {
include $file;
// exit render mode
$this->template = null;
} else {
ob_start();
include $file;
// exit render mode
$this->template = null;
return ob_get_clean();
}
} else {
// no need to build cache
// exit render mode
$this->template = null;
// output
if ($_output === true) {
echo $out;
} else {
return $out;
}
}
}
}
/**
* re-initializes the globals array before each template run
*
* @param Dwoo_ITemplate $tpl the template that is going to be rendered
*/
protected function initGlobals(Dwoo_ITemplate $tpl)
{
$this->globals = array
(
'version' => self::VERSION,
'ad' => '<a href="http://dwoo.org/">Powered by Dwoo</a>',
'now' => $_SERVER['REQUEST_TIME'],
'template' => $tpl->getName(),
'charset' => $this->charset,
);
}
/**
* re-initializes the runtime variables before each template run
*
* @param Dwoo_ITemplate $tpl the template that is going to be rendered
*/
protected function initRuntimeVars(Dwoo_ITemplate $tpl)
{
$this->runtimePlugins = array();
$this->scope =& $this->data;
$this->scopeTree = array();
$this->stack = array();
$this->curBlock = null;
$this->buffer = '';
}
/*
* --------- settings functions ---------
*/
/**
* adds a custom plugin that is not in one of the plugin directories
*
* @param string $name the plugin name to be used in the templates
* @param callback $callback the plugin callback, either a function name,
* a class name or an array containing an object
* or class name and a method name
* @param bool $compilable if set to true, the plugin is assumed to be compilable
*/
public function addPlugin($name, $callback, $compilable = false)
{
$compilable = $compilable ? self::COMPILABLE_PLUGIN : 0;
if (is_array($callback)) {
if (is_subclass_of(is_object($callback[0]) ? get_class($callback[0]) : $callback[0], 'Dwoo_Block_Plugin')) {
$this->plugins[$name] = array('type'=>self::BLOCK_PLUGIN | $compilable, 'callback'=>$callback, 'class'=>(is_object($callback[0]) ? get_class($callback[0]) : $callback[0]));
} else {
$this->plugins[$name] = array('type'=>self::CLASS_PLUGIN | $compilable, 'callback'=>$callback, 'class'=>(is_object($callback[0]) ? get_class($callback[0]) : $callback[0]), 'function'=>$callback[1]);
}
} elseif (class_exists($callback, false)) {
if (is_subclass_of($callback, 'Dwoo_Block_Plugin')) {
$this->plugins[$name] = array('type'=>self::BLOCK_PLUGIN | $compilable, 'callback'=>$callback, 'class'=>$callback);
} else {
$this->plugins[$name] = array('type'=>self::CLASS_PLUGIN | $compilable, 'callback'=>$callback, 'class'=>$callback, 'function'=>'process');
}
} elseif (function_exists($callback)) {
$this->plugins[$name] = array('type'=>self::FUNC_PLUGIN | $compilable, 'callback'=>$callback);
} else {
throw new Dwoo_Exception('Callback could not be processed correctly, please check that the function/class you used exists');
}
}
/**
* removes a custom plugin
*
* @param string $name the plugin name
*/
public function removePlugin($name)
{
if (isset($this->plugins[$name])) {
unset($this->plugins[$name]);
}
}
/**
* adds a filter to this Dwoo instance, it will be used to filter the output of all the templates rendered by this instance
*
* @param mixed $callback a callback or a filter name if it is autoloaded from a plugin directory
* @param bool $autoload if true, the first parameter must be a filter name from one of the plugin directories
*/
public function addFilter($callback, $autoload = false)
{
if ($autoload) {
$class = 'Dwoo_Filter_'.$callback;
if (!class_exists($class, false) && !function_exists($class)) {
try {
$this->getLoader()->loadPlugin($callback);
} catch (Dwoo_Exception $e) {
if (strstr($callback, 'Dwoo_Filter_')) {
throw new Dwoo_Exception('Wrong filter name : '.$callback.', the "Dwoo_Filter_" prefix should not be used, please only use "'.str_replace('Dwoo_Filter_', '', $callback).'"');
} else {
throw new Dwoo_Exception('Wrong filter name : '.$callback.', when using autoload the filter must be in one of your plugin dir as "name.php" containg a class or function named "Dwoo_Filter_name"');
}
}
}
if (class_exists($class, false)) {
$callback = array(new $class($this), 'process');
} elseif (function_exists($class)) {
$callback = $class;
} else {
throw new Dwoo_Exception('Wrong filter name : '.$callback.', when using autoload the filter must be in one of your plugin dir as "name.php" containg a class or function named "Dwoo_Filter_name"');
}
$this->filters[] = $callback;
} else {
$this->filters[] = $callback;
}
}
/**
* removes a filter
*
* @param mixed $callback callback or filter name if it was autoloaded
*/
public function removeFilter($callback)
{
if (($index = array_search('Dwoo_Filter_'.$callback, $this->filters, true)) !== false) {
unset($this->filters[$index]);
} elseif (($index = array_search($callback, $this->filters, true)) !== false) {
unset($this->filters[$index]);
} else {
$class = 'Dwoo_Filter_' . $callback;
foreach ($this->filters as $index=>$filter) {
if (is_array($filter) && $filter[0] instanceof $class) {
unset($this->filters[$index]);
break;
}
}
}
}
/**
* adds a resource or overrides a default one
*
* @param string $name the resource name
* @param string $class the resource class (which must implement Dwoo_ITemplate)
* @param callback $compilerFactory the compiler factory callback, a function that must return a compiler instance used to compile this resource, if none is provided. by default it will produce a Dwoo_Compiler object
*/
public function addResource($name, $class, $compilerFactory = null)
{
if (strlen($name) < 2) {
throw new Dwoo_Exception('Resource names must be at least two-character long to avoid conflicts with Windows paths');
}
if (!class_exists($class)) {
throw new Dwoo_Exception('Resource class does not exist');
}
$interfaces = class_implements($class);
if (in_array('Dwoo_ITemplate', $interfaces) === false) {
throw new Dwoo_Exception('Resource class must implement Dwoo_ITemplate');
}
$this->resources[$name] = array('class'=>$class, 'compiler'=>$compilerFactory);
}
/**
* removes a custom resource
*
* @param string $name the resource name
*/
public function removeResource($name)
{
unset($this->resources[$name]);
if ($name==='file') {
$this->resources['file'] = array('class'=>'Dwoo_Template_File', 'compiler'=>null);
}
}
/*
* --------- getters and setters ---------
*/
/**
* sets the loader object to use to load plugins
*
* @param Dwoo_ILoader $loader loader object
*/
public function setLoader(Dwoo_ILoader $loader)
{
$this->loader = $loader;
}
/**
* returns the current loader object or a default one if none is currently found
*
* @param Dwoo_ILoader
*/
public function getLoader()
{
if ($this->loader === null) {
$this->loader = new Dwoo_Loader($this->compileDir);
}
return $this->loader;
}
/**
* returns the custom plugins loaded
*
* used by the Dwoo_ITemplate classes to pass the custom plugins to their Dwoo_ICompiler instance
*
* @return array
*/
public function getCustomPlugins()
{
return $this->plugins;
}
/**
* returns the cache directory with a trailing DIRECTORY_SEPARATOR
*
* @return string
*/
public function getCacheDir()
{
return $this->cacheDir;
}
/**
* sets the cache directory and automatically appends a DIRECTORY_SEPARATOR
*
* @param string $dir the cache directory
*/
public function setCacheDir($dir)
{
$this->cacheDir = rtrim($dir, '/\\').DIRECTORY_SEPARATOR;
if (is_writable($this->cacheDir) === false) {
throw new Dwoo_Exception('The cache directory must be writable, chmod "'.$this->cacheDir.'" to make it writable');
}
}
/**
* returns the compile directory with a trailing DIRECTORY_SEPARATOR
*
* @return string
*/
public function getCompileDir()
{
return $this->compileDir;
}
/**
* sets the compile directory and automatically appends a DIRECTORY_SEPARATOR
*
* @param string $dir the compile directory
*/
public function setCompileDir($dir)
{
$this->compileDir = rtrim($dir, '/\\').DIRECTORY_SEPARATOR;
if (is_writable($this->compileDir) === false) {
throw new Dwoo_Exception('The compile directory must be writable, chmod "'.$this->compileDir.'" to make it writable');
}
}
/**
* returns the default cache time that is used with templates that do not have a cache time set
*
* @return int the duration in seconds
*/
public function getCacheTime()
{
return $this->cacheTime;
}
/**
* sets the default cache time to use with templates that do not have a cache time set
*
* @param int $seconds the duration in seconds
*/
public function setCacheTime($seconds)
{
$this->cacheTime = (int) $seconds;
}
/**
* returns the character set used by the string manipulation plugins
*
* the charset is automatically lowercased
*
* @return string
*/
public function getCharset()
{
return $this->charset;
}
/**
* sets the character set used by the string manipulation plugins
*
* the charset will be automatically lowercased
*
* @param string $charset the character set
*/
public function setCharset($charset)
{
$this->charset = strtolower((string) $charset);
}
/**
* returns the current template being rendered, when applicable, or null
*
* @return Dwoo_ITemplate|null
*/
public function getTemplate()
{
return $this->template;
}
/**
* sets the default compiler factory function for the given resource name
*
* a compiler factory must return a Dwoo_ICompiler object pre-configured to fit your needs
*
* @param string $resourceName the resource name (i.e. file, string)
* @param callback $compilerFactory the compiler factory callback
*/
public function setDefaultCompilerFactory($resourceName, $compilerFactory)
{
$this->resources[$resourceName]['compiler'] = $compilerFactory;
}
/**
* returns the default compiler factory function for the given resource name
*
* @param string $resourceName the resource name
* @return callback the compiler factory callback
*/
public function getDefaultCompilerFactory($resourceName)
{
return $this->resources[$resourceName]['compiler'];
}
/**
* sets the security policy object to enforce some php security settings
*
* use this if untrusted persons can modify templates
*
* @param Dwoo_Security_Policy $policy the security policy object
*/
public function setSecurityPolicy(Dwoo_Security_Policy $policy = null)
{
$this->securityPolicy = $policy;
}
/**
* returns the current security policy object or null by default
*
* @return Dwoo_Security_Policy|nullthe security policy object if any
*/
public function getSecurityPolicy()
{
return $this->securityPolicy;
}
/**
* sets the object that must be used as a plugin proxy when plugin can't be found
* by dwoo's loader
*
* @param Dwoo_IPluginProxy $pluginProxy the proxy object
*/
public function setPluginProxy(Dwoo_IPluginProxy $pluginProxy) {
$this->pluginProxy = $pluginProxy;
}
/**
* returns the current plugin proxy object or null by default
*
* @param Dwoo_IPluginProxy|nullthe proxy object if any
*/
public function getPluginProxy() {
return $this->pluginProxy;
}
/*
* --------- util functions ---------
*/
/**
* [util function] checks whether the given template is cached or not
*
* @param Dwoo_ITemplate $tpl the template object
* @return bool
*/
public function isCached(Dwoo_ITemplate $tpl)
{
return is_string($tpl->getCachedTemplate($this));
}
/**
* [util function] clears the cached templates if they are older than the given time
*
* @param int $olderThan minimum time (in seconds) required for a cached template to be cleared
* @return int the amount of templates cleared
*/
public function clearCache($olderThan=-1)
{
$cacheDirs = new RecursiveDirectoryIterator($this->cacheDir);
$cache = new RecursiveIteratorIterator($cacheDirs);
$expired = time() - $olderThan;
$count = 0;
foreach ($cache as $file) {
if ($cache->isDot() || $cache->isDir() || substr($file, -5) !== '.html') {
continue;
}
if ($cache->getCTime() < $expired) {
$count += unlink((string) $file) ? 1 : 0;
}
}
return $count;
}
/**
* [util function] fetches a template object of the given resource
*
* @param string $resourceName the resource name (i.e. file, string)
* @param string $resourceId the resource identifier (i.e. file path)
* @param int $cacheTime the cache time setting for this resource
* @param string $cacheId the unique cache identifier
* @param string $compileId the unique compiler identifier
* @return Dwoo_ITemplate
*/
public function templateFactory($resourceName, $resourceId, $cacheTime = null, $cacheId = null, $compileId = null, Dwoo_ITemplate $parentTemplate = null)
{
if (isset($this->resources[$resourceName])) {
// TODO could be changed to $this->resources[$resourceName]['class']::templateFactory(..) in 5.3 maybe
return call_user_func(array($this->resources[$resourceName]['class'], 'templateFactory'), $this, $resourceId, $cacheTime, $cacheId, $compileId, $parentTemplate);
} else {
throw new Dwoo_Exception('Unknown resource type : '.$resourceName);
}
}
/**
* [util function] checks if the input is an array or an iterator object, optionally it can also check if it's empty
*
* @param mixed $value the variable to check
* @param bool $checkIsEmpty if true, the function will also check if the array is empty
* @param bool $allowNonCountable if true, the function will return true if
* an object is not empty but does not implement Countable, by default a
* non- countable object is considered empty, this setting is only used if
* $checkIsEmpty is true
* @return bool true if it's an array (and not empty) or false if it's not an array (or if it's empty)
*/
public function isArray($value, $checkIsEmpty=false, $allowNonCountable=false)
{
if (is_array($value) === true) {
if ($checkIsEmpty === false) {
return true;
} else {
return count($value) > 0;
}
} elseif ($value instanceof Iterator || $value instanceof ArrayAccess) {
if ($checkIsEmpty === false) {
return true;
} else {
if ($allowNonCountable === false) {
return count($value) > 0;
} else {
if ($value instanceof Countable) {
return count($value) > 0;
} else {
$value->rewind();
return $value->valid();
}
}
}
}
return false;
}
/**
* [util function] triggers a dwoo error
*
* @param string $message the error message
* @param int $level the error level, one of the PHP's E_* constants
*/
public function triggerError($message, $level=E_USER_NOTICE)
{
if (!($tplIdentifier = $this->template->getResourceIdentifier())) {
$tplIdentifier = $this->template->getResourceName();
}
trigger_error('Dwoo error (in '.$tplIdentifier.') : '.$message, $level);
}
/*
* --------- runtime functions ---------
*/
/**
* [runtime function] adds a block to the block stack
*
* @param string $blockName the block name (without Dwoo_Plugin_ prefix)
* @param array $args the arguments to be passed to the block's init() function
* @return Dwoo_Block_Plugin the newly created block
*/
public function addStack($blockName, array $args=array())
{
if (isset($this->plugins[$blockName])) {
$class = $this->plugins[$blockName]['class'];
} else {
$class = 'Dwoo_Plugin_'.$blockName;
}
if ($this->curBlock !== null) {
$this->curBlock->buffer(ob_get_contents());
ob_clean();
} else {
$this->buffer .= ob_get_contents();
ob_clean();
}
$block = new $class($this);
$cnt = count($args);
if ($cnt===0) {
$block->init();
} elseif ($cnt===1) {
$block->init($args[0]);
} elseif ($cnt===2) {
$block->init($args[0], $args[1]);
} elseif ($cnt===3) {
$block->init($args[0], $args[1], $args[2]);
} elseif ($cnt===4) {
$block->init($args[0], $args[1], $args[2], $args[3]);
} else {
call_user_func_array(array($block,'init'), $args);
}
$this->stack[] = $this->curBlock = $block;
return $block;
}
/**
* [runtime function] removes the plugin at the top of the block stack
*
* calls the block buffer() function, followed by a call to end()
* and finally a call to process()
*/
public function delStack()
{
$args = func_get_args();
$this->curBlock->buffer(ob_get_contents());
ob_clean();
$cnt = count($args);
if ($cnt===0) {
$this->curBlock->end();
} elseif ($cnt===1) {
$this->curBlock->end($args[0]);
} elseif ($cnt===2) {
$this->curBlock->end($args[0], $args[1]);
} elseif ($cnt===3) {
$this->curBlock->end($args[0], $args[1], $args[2]);
} elseif ($cnt===4) {
$this->curBlock->end($args[0], $args[1], $args[2], $args[3]);
} else {
call_user_func_array(array($this->curBlock, 'end'), $args);
}
$tmp = array_pop($this->stack);
if (count($this->stack) > 0) {
$this->curBlock = end($this->stack);
$this->curBlock->buffer($tmp->process());
} else {
$this->curBlock = null;
echo $tmp->process();
}
unset($tmp);
}
/**
* [runtime function] returns the parent block of the given block
*
* @param Dwoo_Block_Plugin $block
* @return Dwoo_Block_Plugin or false if the given block isn't in the stack
*/
public function getParentBlock(Dwoo_Block_Plugin $block)
{
$index = array_search($block, $this->stack, true);
if ($index !== false && $index > 0) {
return $this->stack[$index-1];
}
return false;
}
/**
* [runtime function] finds the closest block of the given type, starting at the top of the stack
*
* @param string $type the type of plugin you want to find
* @return Dwoo_Block_Plugin or false if no plugin of such type is in the stack
*/
public function findBlock($type)
{
if (isset($this->plugins[$type])) {
$type = $this->plugins[$type]['class'];
} else {
$type = 'Dwoo_Plugin_'.str_replace('Dwoo_Plugin_', '', $type);
}
$keys = array_keys($this->stack);
while (($key = array_pop($keys)) !== false) {
if ($this->stack[$key] instanceof $type) {
return $this->stack[$key];
}
}
return false;
}
/**
* [runtime function] returns a Dwoo_Plugin of the given class
*
* this is so a single instance of every class plugin is created at each template run,
* allowing class plugins to have "per-template-run" static variables
*
* @param string $class the class name
* @return mixed an object of the given class
*/
protected function getObjectPlugin($class)
{
if (isset($this->runtimePlugins[$class])) {
return $this->runtimePlugins[$class];
}
return $this->runtimePlugins[$class] = new $class($this);
}
/**
* [runtime function] calls the process() method of the given class-plugin name
*
* @param string $plugName the class plugin name (without Dwoo_Plugin_ prefix)
* @param array $params an array of parameters to send to the process() method
* @return string the process() return value
*/
public function classCall($plugName, array $params = array())
{
$class = 'Dwoo_Plugin_'.$plugName;
$plugin = $this->getObjectPlugin($class);
$cnt = count($params);
if ($cnt===0) {
return $plugin->process();
} elseif ($cnt===1) {
return $plugin->process($params[0]);
} elseif ($cnt===2) {
return $plugin->process($params[0], $params[1]);
} elseif ($cnt===3) {
return $plugin->process($params[0], $params[1], $params[2]);
} elseif ($cnt===4) {
return $plugin->process($params[0], $params[1], $params[2], $params[3]);
} else {
return call_user_func_array(array($plugin, 'process'), $params);
}
}
/**
* [runtime function] calls a php function
*
* @param string $callback the function to call
* @param array $params an array of parameters to send to the function
* @return mixed the return value of the called function
*/
public function arrayMap($callback, array $params)
{
if ($params[0] === $this) {
$addThis = true;
array_shift($params);
}
if ((is_array($params[0]) || ($params[0] instanceof Iterator && $params[0] instanceof ArrayAccess))) {
if (empty($params[0])) {
return $params[0];
}
// array map
$out = array();
$cnt = count($params);
if (isset($addThis)) {
array_unshift($params, $this);
$items = $params[1];
$keys = array_keys($items);
if (is_string($callback) === false) {
while (($i = array_shift($keys)) !== null) {
$out[] = call_user_func_array($callback, array(1=>$items[$i]) + $params);
}
} elseif ($cnt===1) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($this, $items[$i]);
}
} elseif ($cnt===2) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($this, $items[$i], $params[2]);
}
} elseif ($cnt===3) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($this, $items[$i], $params[2], $params[3]);
}
} else {
while (($i = array_shift($keys)) !== null) {
$out[] = call_user_func_array($callback, array(1=>$items[$i]) + $params);
}
}
} else {
$items = $params[0];
$keys = array_keys($items);
if (is_string($callback) === false) {
while (($i = array_shift($keys)) !== null) {
$out[] = call_user_func_array($callback, array($items[$i]) + $params);
}
} elseif ($cnt===1) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($items[$i]);
}
} elseif ($cnt===2) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($items[$i], $params[1]);
}
} elseif ($cnt===3) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($items[$i], $params[1], $params[2]);
}
} elseif ($cnt===4) {
while (($i = array_shift($keys)) !== null) {
$out[] = $callback($items[$i], $params[1], $params[2], $params[3]);
}
} else {
while (($i = array_shift($keys)) !== null) {
$out[] = call_user_func_array($callback, array($items[$i]) + $params);
}
}
}
return $out;
} else {
return $params[0];
}
}
/**
* [runtime function] reads a variable into the given data array
*
* @param string $varstr the variable string, using dwoo variable syntax (i.e. "var.subvar[subsubvar]->property")
* @param mixed $data the data array or object to read from
* @return mixed
*/
public function readVarInto($varstr, $data)
{
if ($data === null) {
return null;
}
if (is_array($varstr) === false) {
preg_match_all('#(\[|->|\.)?([a-z0-9_]+)\]?#i', $varstr, $m);
} else {
$m = $varstr;
}
unset($varstr);
while (list($k, $sep) = each($m[1])) {
if ($sep === '.' || $sep === '[' || $sep === '') {
if ((is_array($data) || $data instanceof ArrayAccess) && isset($data[$m[2][$k]])) {
$data = $data[$m[2][$k]];
} else {
return null;
}
} else {
if (is_object($data)) {
$data = $data->$m[2][$k];
} else {
return null;
}
}
}
return $data;
}
/**
* [runtime function] reads a variable into the parent scope
*
* @param int $parentLevels the amount of parent levels to go from the current scope
* @param string $varstr the variable string, using dwoo variable syntax (i.e. "var.subvar[subsubvar]->property")
* @return mixed
*/
public function readParentVar($parentLevels, $varstr = null)
{
$tree = $this->scopeTree;
$cur = $this->data;
while ($parentLevels--!==0) {
array_pop($tree);
}
while (($i = array_shift($tree)) !== null) {
if (is_object($cur)) {
$cur = $cur->$i;
} else {
$cur = $cur[$i];
}
}
if ($varstr!==null) {
return $this->readVarInto($varstr, $cur);
} else {
return $cur;
}
}
/**
* [runtime function] reads a variable into the current scope
*
* @param string $varstr the variable string, using dwoo variable syntax (i.e. "var.subvar[subsubvar]->property")
* @return mixed
*/
public function readVar($varstr)
{
if (is_array($varstr)===true) {
$m = $varstr;
unset($varstr);
} else {
if (strstr($varstr, '.') === false && strstr($varstr, '[') === false && strstr($varstr, '->') === false) {
if ($varstr === 'dwoo') {
return $this->globals;
} elseif ($varstr === '__' || $varstr === '_root' ) {
return $this->data;
$varstr = substr($varstr, 6);
} elseif ($varstr === '_' || $varstr === '_parent') {
$varstr = '.'.$varstr;
$tree = $this->scopeTree;
$cur = $this->data;
array_pop($tree);
while (($i = array_shift($tree)) !== null) {
if (is_object($cur)) {
$cur = $cur->$i;
} else {
$cur = $cur[$i];
}
}
return $cur;
}
$cur = $this->scope;
if (isset($cur[$varstr])) {
return $cur[$varstr];
} else {
return null;
}
}
if (substr($varstr, 0, 1) === '.') {
$varstr = 'dwoo'.$varstr;
}
preg_match_all('#(\[|->|\.)?([a-z0-9_]+)\]?#i', $varstr, $m);
}
$i = $m[2][0];
if ($i === 'dwoo') {
$cur = $this->globals;
array_shift($m[2]);
array_shift($m[1]);
switch ($m[2][0]) {
case 'get':
$cur = $_GET;
break;
case 'post':
$cur = $_POST;
break;
case 'session':
$cur = $_SESSION;
break;
case 'cookies':
case 'cookie':
$cur = $_COOKIE;
break;
case 'server':
$cur = $_SERVER;
break;
case 'env':
$cur = $_ENV;
break;
case 'request':
$cur = $_REQUEST;
break;
case 'const':
array_shift($m[2]);
if (defined($m[2][0])) {
return constant($m[2][0]);
} else {
return null;
}
}
if ($cur !== $this->globals) {
array_shift($m[2]);
array_shift($m[1]);
}
} elseif ($i === '__' || $i === '_root') {
$cur = $this->data;
array_shift($m[2]);
array_shift($m[1]);
} elseif ($i === '_' || $i === '_parent') {
$tree = $this->scopeTree;
$cur = $this->data;
while (true) {
array_pop($tree);
array_shift($m[2]);
array_shift($m[1]);
if (current($m[2]) === '_' || current($m[2]) === '_parent') {
continue;
}
while (($i = array_shift($tree)) !== null) {
if (is_object($cur)) {
$cur = $cur->$i;
} else {
$cur = $cur[$i];
}
}
break;
}
} else {
$cur = $this->scope;
}
while (list($k, $sep) = each($m[1])) {
if ($sep === '.' || $sep === '[' || $sep === '') {
if ((is_array($cur) || $cur instanceof ArrayAccess) && isset($cur[$m[2][$k]])) {
$cur = $cur[$m[2][$k]];
} else {
return null;
}
} elseif ($sep === '->') {
if (is_object($cur)) {
$cur = $cur->$m[2][$k];
} else {
return null;
}
} else {
return null;
}
}
return $cur;
}
/**
* [runtime function] assign the value to the given variable
*
* @param mixed $value the value to assign
* @param string $scope the variable string, using dwoo variable syntax (i.e. "var.subvar[subsubvar]->property")
* @return bool true if assigned correctly or false if a problem occured while parsing the var string
*/
public function assignInScope($value, $scope)
{
$tree =& $this->scopeTree;
$data =& $this->data;
if (strstr($scope, '.') === false && strstr($scope, '->') === false) {
$this->scope[$scope] = $value;
} else {
// TODO handle _root/_parent scopes ?
preg_match_all('#(\[|->|\.)?([a-z0-9_]+)\]?#i', $scope, $m);
$cur =& $this->scope;
$last = array(array_pop($m[1]), array_pop($m[2]));
while (list($k, $sep) = each($m[1])) {
if ($sep === '.' || $sep === '[' || $sep === '') {
if (is_array($cur) === false) {
$cur = array();
}
$cur =& $cur[$m[2][$k]];
} elseif ($sep === '->') {
if (is_object($cur) === false) {
$cur = new stdClass;
}
$cur =& $cur->$m[2][$k];
} else {
return false;
}
}
if ($last[0] === '.' || $last[0] === '[' || $last[0] === '') {
if (is_array($cur) === false) {
$cur = array();
}
$cur[$last[1]] = $value;
} elseif ($last[0] === '->') {
if (is_object($cur) === false) {
$cur = new stdClass;
}
$cur->$last[1] = $value;
} else {
return false;
}
}
}
/**
* [runtime function] sets the scope to the given scope string or array
*
* @param mixed $scope a string i.e. "level1.level2" or an array i.e. array("level1", "level2")
* @param bool $absolute if true, the scope is set from the top level scope and not from the current scope
* @return array the current scope tree
*/
public function setScope($scope, $absolute = false)
{
$old = $this->scopeTree;
if (is_string($scope)===true) {
$scope = explode('.', $scope);
}
if ($absolute===true) {
$this->scope =& $this->data;
$this->scopeTree = array();
}
while (($bit = array_shift($scope)) !== null) {
if ($bit === '_' || $bit === '_parent') {
array_pop($this->scopeTree);
$this->scope =& $this->data;
$cnt = count($this->scopeTree);
for ($i=0;$i<$cnt;$i++)
$this->scope =& $this->scope[$this->scopeTree[$i]];
} elseif ($bit === '__' || $bit === '_root') {
$this->scope =& $this->data;
$this->scopeTree = array();
} elseif (isset($this->scope[$bit])) {
$this->scope =& $this->scope[$bit];
$this->scopeTree[] = $bit;
} else {
unset($this->scope);
$this->scope = null;
}
}
return $old;
}
/**
* [runtime function] returns the entire data array
*
* @return array
*/
public function getData()
{
return $this->data;
}
/**
* [runtime function] returns a reference to the current scope
*
* @return &mixed
*/
public function &getScope()
{
return $this->scope;
}
/**
* [runtime function] forces an absolute scope
*
* @deprecated
* @see setScope
* @param mixed $scope a scope as a string or array
* @return array the current scope tree
*/
public function forceScope($scope)
{
return $this->setScope($scope, true);
}
}

Documentation generated on Sun, 07 Sep 2008 23:57:43 +0200 by phpDocumentor 1.4.0

Source for file Dwoo.php