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<?php

/**
* This tracks the current scope for an SSViewer instance. It has three goals:
* - Handle entering & leaving sub-scopes in loops and withs
* - Track Up and Top
* - (As a side effect) Inject data that needs to be available globally (used to live in ViewableData)
*
* In order to handle up, rather than tracking it using a tree, which would involve constructing new objects
* for each step, we use indexes into the itemStack (which already has to exist).
*
* Each item has three indexes associated with it
*
* - Pop. Which item should become the scope once the current scope is popped out of
* - Up. Which item is up from this item
* - Current. Which item is the first time this object has appeared in the stack
*
* We also keep the index of the current starting point for lookups. A lookup is a sequence of obj calls -
* when in a loop or with tag the end result becomes the new scope, but for injections, we throw away the lookup
* and revert back to the original scope once we've got the value we're after
*
*/
class SSViewer_Scope {

// The stack of previous "global" items
// And array of item, itemIterator, itemIteratorTotal, pop_index, up_index, current_index
private $itemStack = array();

protected $item; // The current "global" item (the one any lookup starts from)
protected $itemIterator; // If we're looping over the current "global" item, here's the iterator that tracks with item we're up to
protected $itemIteratorTotal; //Total number of items in the iterator

private $popIndex; // A pointer into the item stack for which item should be scope on the next pop call
private $upIndex = null; // A pointer into the item stack for which item is "up" from this one
private $currentIndex = null; // A pointer into the item stack for which item is this one (or null if not in stack yet)

private $localIndex;


function __construct($item){
$this->item = $item;
$this->localIndex=0;
$this->itemStack[] = array($this->item, null, 0, null, null, 0);
}

function getItem(){
return $this->itemIterator ? $this->itemIterator->current() : $this->item;
}

function resetLocalScope(){
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $this->popIndex, $this->upIndex, $this->currentIndex) = $this->itemStack[$this->localIndex];
array_splice($this->itemStack, $this->localIndex+1);
}

function getObj($name, $arguments = null, $forceReturnedObject = true, $cache = false, $cacheName = null) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
return $on->obj($name, $arguments, $forceReturnedObject, $cache, $cacheName);
}

function obj($name, $arguments = null, $forceReturnedObject = true, $cache = false, $cacheName = null) {
switch ($name) {
case 'Up':
if ($this->upIndex === null) user_error('Up called when we\'re already at the top of the scope', E_USER_ERROR);

list($this->item, $this->itemIterator, $this->itemIteratorTotal, $unused2, $this->upIndex, $this->currentIndex) = $this->itemStack[$this->upIndex];
break;

case 'Top':
list($this->item, $this->itemIterator, $this->itemIteratorTotal, $unused2, $this->upIndex, $this->currentIndex) = $this->itemStack[0];
break;

default:
$this->item = $this->getObj($name, $arguments, $forceReturnedObject, $cache, $cacheName);
$this->itemIterator = null;
$this->upIndex = $this->currentIndex ? $this->currentIndex : count($this->itemStack)-1;
$this->currentIndex = count($this->itemStack);
break;
}

$this->itemStack[] = array($this->item, $this->itemIterator, $this->itemIteratorTotal, null, $this->upIndex, $this->currentIndex);
return $this;
}

function pushScope(){
$newLocalIndex = count($this->itemStack)-1;

$this->popIndex = $this->itemStack[$newLocalIndex][3] = $this->localIndex;
$this->localIndex = $newLocalIndex;

// We normally keep any previous itemIterator around, so local $Up calls reference the right element. But
// once we enter a new global scope, we need to make sure we use a new one
$this->itemIterator = $this->itemStack[$newLocalIndex][1] = null;

return $this;
}

function popScope(){
$this->localIndex = $this->popIndex;
$this->resetLocalScope();

return $this;
}

function next(){
if (!$this->item) return false;

if (!$this->itemIterator) {
if (is_array($this->item)) $this->itemIterator = new ArrayIterator($this->item);
else $this->itemIterator = $this->item->getIterator();

$this->itemStack[$this->localIndex][1] = $this->itemIterator;
$this->itemIteratorTotal = iterator_count($this->itemIterator); //count the total number of items
$this->itemStack[$this->localIndex][2] = $this->itemIteratorTotal;
$this->itemIterator->rewind();
}
else {
$this->itemIterator->next();
}

$this->resetLocalScope();

if (!$this->itemIterator->valid()) return false;
return $this->itemIterator->key();
}

function __call($name, $arguments) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;
$retval = call_user_func_array(array($on, $name), $arguments);

$this->resetLocalScope();
return $retval;
}
}

class SSViewer_BasicIteratorSupport implements TemplateIteratorProvider {

protected $iteratorPos;
protected $iteratorTotalItems;

public static function get_template_iterator_variables() {
return array(
'First',
'Last',
'FirstLast',
'Middle',
'MiddleString',
'Even',
'Odd',
'EvenOdd',
'Pos',
'TotalItems',
'Modulus',
'MultipleOf',
);
}

/**
* Set the current iterator properties - where we are on the iterator.
*
* @param int $pos position in iterator
* @param int $totalItems total number of items
*/
public function iteratorProperties($pos, $totalItems) {
$this->iteratorPos = $pos;
$this->iteratorTotalItems = $totalItems;
}

/**
* Returns true if this object is the first in a set.
*
* @return bool
*/
public function First() {
return $this->iteratorPos == 0;
}

/**
* Returns true if this object is the last in a set.
*
* @return bool
*/
public function Last() {
return $this->iteratorPos == $this->iteratorTotalItems - 1;
}

/**
* Returns 'first' or 'last' if this is the first or last object in the set.
*
* @return string|null
*/
public function FirstLast() {
if($this->First() && $this->Last()) return 'first last';
if($this->First()) return 'first';
if($this->Last()) return 'last';
}

/**
* Return true if this object is between the first & last objects.
*
* @return bool
*/
public function Middle() {
return !$this->First() && !$this->Last();
}

/**
* Return 'middle' if this object is between the first & last objects.
*
* @return string|null
*/
public function MiddleString() {
if($this->Middle()) return 'middle';
}

/**
* Return true if this object is an even item in the set.
* The count starts from $startIndex, which defaults to 1.
*
* @param int $startIndex Number to start count from.
* @return bool
*/
public function Even($startIndex = 1) {
return !$this->Odd($startIndex);
}

/**
* Return true if this is an odd item in the set.
*
* @param int $startIndex Number to start count from.
* @return bool
*/
public function Odd($startIndex = 1) {
return (bool) (($this->iteratorPos+$startIndex) % 2);
}

/**
* Return 'even' or 'odd' if this object is in an even or odd position in the set respectively.
*
* @param int $startIndex Number to start count from.
* @return string
*/
public function EvenOdd($startIndex = 1) {
return ($this->Even($startIndex)) ? 'even' : 'odd';
}

/**
* Return the numerical position of this object in the container set. The count starts at $startIndex.
* The default is the give the position using a 1-based index.
*
* @param int $startIndex Number to start count from.
* @return int
*/
public function Pos($startIndex = 1) {
return $this->iteratorPos + $startIndex;
}

/**
* Return the total number of "sibling" items in the dataset.
*
* @return int
*/
public function TotalItems() {
return $this->iteratorTotalItems;
}

/**
* Returns the modulus of the numerical position of the item in the data set.
* The count starts from $startIndex, which defaults to 1.
* @param int $Mod The number to perform Mod operation to.
* @param int $startIndex Number to start count from.
* @return int
*/
public function Modulus($mod, $startIndex = 1) {
return ($this->iteratorPos + $startIndex) % $mod;
}

/**
* Returns true or false depending on if the pos of the iterator is a multiple of a specific number.
* So, <% if MultipleOf(3) %> would return true on indexes: 3,6,9,12,15, etc.
* The count starts from $offset, which defaults to 1.
* @param int $factor The multiple of which to return
* @param int $offset Number to start count from.
* @return bool
*/
public function MultipleOf($factor, $offset = 1) {
return (bool) ($this->Modulus($factor, $offset) == 0);
}



}
/**
* This extends SSViewer_Scope to mix in data on top of what the item provides. This can be "global"
* data that is scope-independant (like BaseURL), or type-specific data that is layered on top cross-cut like
* (like $FirstLast etc).
*
* It's separate from SSViewer_Scope to keep that fairly complex code as clean as possible.
*/
class SSViewer_DataPresenter extends SSViewer_Scope {

private static $globalProperties = null;
private static $iteratorProperties = null;

/** @var array|null Overlay variables. Take precedence over anything from the current scope */
protected $overlay;
/** @var array|null Underlay variables. Concede precedence to overlay variables or anything from the current scope */
protected $underlay;

function __construct($item, $overlay = null, $underlay = null){
parent::__construct($item);

// Build up global property providers array only once per request
if (self::$globalProperties === null) {
self::$globalProperties = array();
// Get all the exposed variables from all classes that implement the TemplateGlobalProvider interface
$this->createCallableArray(self::$globalProperties, "TemplateGlobalProvider", "get_template_global_variables");
}

// Build up iterator property providers array only once per request
if (self::$iteratorProperties === null) {
self::$iteratorProperties = array();
// Get all the exposed variables from all classes that implement the TemplateIteratorProvider interface
$this->createCallableArray(self::$iteratorProperties, "TemplateIteratorProvider", "get_template_iterator_variables", true); //call non-statically
}

$this->overlay = $overlay ? $overlay : array();
$this->underlay = $underlay ? $underlay : array();
}

protected function createCallableArray(&$extraArray, $interfaceToQuery, $variableMethod, $createObject = false) {
$implementers = ClassInfo::implementorsOf($interfaceToQuery);
if($implementers) foreach($implementers as $implementer) {

// Create a new instance of the object for method calls
if ($createObject) $implementer = new $implementer();

// Get the exposed variables
$exposedVariables = call_user_func(array($implementer, $variableMethod));

foreach($exposedVariables as $varName => $details) {
if (!is_array($details)) $details = array('method' => $details, 'casting' => Config::inst()->get('ViewableData', 'default_cast', Config::FIRST_SET));

// If just a value (and not a key => value pair), use it for both key and value
if (is_numeric($varName)) $varName = $details['method'];

// Add in a reference to the implementing class (might be a string class name or an instance)
$details['implementer'] = $implementer;

// And a callable array
if (isset($details['method'])) $details['callable'] = array($implementer, $details['method']);

// Save with both uppercase & lowercase first letter, so either works
$lcFirst = strtolower($varName[0]) . substr($varName,1);
$extraArray[$lcFirst] = $details;
$extraArray[ucfirst($varName)] = $details;
}
}
}

function getInjectedValue($property, $params, $cast = true) {
$on = $this->itemIterator ? $this->itemIterator->current() : $this->item;

// Find the source of the value
$source = null;

// Check for a presenter-specific override
if (array_key_exists($property, $this->overlay)) {
$source = array('value' => $this->overlay[$property]);
}
// Check if the method to-be-called exists on the target object - if so, don't check any further injection locations
else if (isset($on->$property) || method_exists($on, $property)) {
$source = null;
}
// Check for a presenter-specific override
else if (array_key_exists($property, $this->underlay)) {
$source = array('value' => $this->underlay[$property]);
}
// Then for iterator-specific overrides
else if (array_key_exists($property, self::$iteratorProperties)) {
$source = self::$iteratorProperties[$property];
if ($this->itemIterator) {
// Set the current iterator position and total (the object instance is the first item in the callable array)
$source['implementer']->iteratorProperties($this->itemIterator->key(), $this->itemIteratorTotal);
} else {
// If we don't actually have an iterator at the moment, act like a list of length 1
$source['implementer']->iteratorProperties(0, 1);
}
}
// And finally for global overrides
else if (array_key_exists($property, self::$globalProperties)) {
$source = self::$globalProperties[$property]; //get the method call
}

if ($source) {
$res = array();

// Look up the value - either from a callable, or from a directly provided value
if (isset($source['callable'])) $res['value'] = call_user_func_array($source['callable'], $params);
elseif (isset($source['value'])) $res['value'] = $source['value'];
else throw new InvalidArgumentException("Injected property $property does't have a value or callable value source provided");

// If we want to provide a casted object, look up what type object to use
if ($cast) {
// If the handler returns an object, then we don't need to cast.
if(is_object($res['value'])) {
$res['obj'] = $res['value'];
} else {
// Get the object to cast as
$casting = isset($source['casting']) ? $source['casting'] : null;

// If not provided, use default
if (!$casting) $casting = Config::inst()->get('ViewableData', 'default_cast', Config::FIRST_SET);

$obj = new $casting($property);
$obj->setValue($res['value']);

$res['obj'] = $obj;
}
}

return $res;
}

}

function getObj($name, $arguments = null, $forceReturnedObject = true, $cache = false, $cacheName = null) {
$result = $this->getInjectedValue($name, (array)$arguments);
if($result) return $result['obj'];
else return parent::getObj($name, $arguments, $forceReturnedObject, $cache, $cacheName);
}

function __call($name, $arguments) {
//extract the method name and parameters
$property = $arguments[0]; //the name of the function being called

if (isset($arguments[1]) && $arguments[1] != null) $params = $arguments[1]; //the function parameters in an array
else $params = array();

$hasInjected = $res = null;

if ($name == 'hasValue') {
if ($val = $this->getInjectedValue($property, $params, false)) {
$hasInjected = true; $res = (bool)$val['value'];
}
}
else { // XML_val
if ($val = $this->getInjectedValue($property, $params)) {
$hasInjected = true;
$obj = $val['obj'];
$res = $obj->forTemplate();
}
}

if ($hasInjected) {
$this->resetLocalScope();
return $res;
}
else {
return parent::__call($name, $arguments);
}
}
}


/**
* Parses a template file with an *.ss file extension.
*
* In addition to a full template in the templates/ folder, a template in
* templates/Content or templates/Layout will be rendered into $Content and
* $Layout, respectively.
*
* A single template can be parsed by multiple nested {@link SSViewer} instances
* through $Layout/$Content placeholders, as well as <% include MyTemplateFile %> template commands.
*
* <b>Themes</b>
*
* See http://doc.silverstripe.org/themes and http://doc.silverstripe.org/themes:developing
*
* <b>Caching</b>
*
* Compiled templates are cached via {@link SS_Cache}, usually on the filesystem.
* If you put ?flush=all on your URL, it will force the template to be recompiled.
*
* @see http://doc.silverstripe.org/themes
* @see http://doc.silverstripe.org/themes:developing
*
* @package framework
* @subpackage view
*/
class SSViewer {

/**
* @var boolean $source_file_comments
*/
protected static $source_file_comments = false;

/**
* Set whether HTML comments indicating the source .SS file used to render this page should be
* included in the output. This is enabled by default
*
* @param boolean $val
*/
static function set_source_file_comments($val) {
self::$source_file_comments = $val;
}

/**
* @return boolean
*/
static function get_source_file_comments() {
return self::$source_file_comments;
}

/**
* @var array $chosenTemplates Associative array for the different
* template containers: "main" and "Layout". Values are absolute file paths to *.ss files.
*/
private $chosenTemplates = array();

/**
* @var boolean
*/
protected $rewriteHashlinks = true;

/**
* @var string
*/
protected static $current_theme = null;

/**
* @var string
*/
protected static $current_custom_theme = null;

/**
* Create a template from a string instead of a .ss file
*
* @return SSViewer
*/
static function fromString($content) {
return new SSViewer_FromString($content);
}

/**
* @param string $theme The "base theme" name (without underscores).
*/
static function set_theme($theme) {
self::$current_theme = $theme;
//Static publishing needs to have a theme set, otherwise it defaults to the content controller theme
if(!is_null($theme))
self::$current_custom_theme=$theme;
}

/**
* @return string
*/
static function current_theme() {
return self::$current_theme;
}

/**
* Returns the path to the theme folder
*
* @return String
*/
static function get_theme_folder() {
return self::current_theme() ? THEMES_DIR . "/" . self::current_theme() : project();
}

/**
* Returns an array of theme names present in a directory.
*
* @param string $path
* @param bool $subthemes Include subthemes (default false).
* @return array
*/
public static function get_themes($path = null, $subthemes = false) {
$path = rtrim($path ? $path : THEMES_PATH, '/');
$themes = array();

if (!is_dir($path)) return $themes;

foreach (scandir($path) as $item) {
if ($item[0] != '.' && is_dir("$path/$item")) {
if ($subthemes || !strpos($item, '_')) {
$themes[$item] = $item;
}
}
}

return $themes;
}

/**
* @return string
*/
static function current_custom_theme(){
return self::$current_custom_theme;
}

/**
* @param string|array $templateList If passed as a string with .ss extension, used as the "main" template.
* If passed as an array, it can be used for template inheritance (first found template "wins").
* Usually the array values are PHP class names, which directly correlate to template names.
* <code>
* array('MySpecificPage', 'MyPage', 'Page')
* </code>
*/
public function __construct($templateList) {
// flush template manifest cache if requested
if (isset($_GET['flush']) && $_GET['flush'] == 'all') {
if(Director::isDev() || Director::is_cli() || Permission::check('ADMIN')) {
self::flush_template_cache();
} else {
if(!Security::ignore_disallowed_actions()) {
return Security::permissionFailure(null, 'Please log in as an administrator to flush the template cache.');
}
}
}

if(!is_array($templateList) && substr((string) $templateList,-3) == '.ss') {
$this->chosenTemplates['main'] = $templateList;
} else {
$this->chosenTemplates = SS_TemplateLoader::instance()->findTemplates(
$templateList, self::current_theme()
);
}

if(!$this->chosenTemplates) {
$templateList = (is_array($templateList)) ? $templateList : array($templateList);

user_error("None of these templates can be found in theme '"
. self::current_theme() . "': ". implode(".ss, ", $templateList) . ".ss", E_USER_WARNING);
}
}

/**
* Returns true if at least one of the listed templates exists
*/
public static function hasTemplate($templates) {
$manifest = SS_TemplateLoader::instance()->getManifest();

foreach ((array) $templates as $template) {
if ($manifest->getTemplate($template)) return true;
}

return false;
}

/**
* Set a global rendering option.
* The following options are available:
* - rewriteHashlinks: If true (the default), <a href="#..."> will be rewritten to contain the
* current URL. This lets it play nicely with our <base> tag.
* - If rewriteHashlinks = 'php' then, a piece of PHP script will be inserted before the hash
* links: "<?php echo $_SERVER['REQUEST_URI']; ?>". This is useful if you're generating a
* page that will be saved to a .php file and may be accessed from different URLs.
*/
public static function setOption($optionName, $optionVal) {
SSViewer::$options[$optionName] = $optionVal;
}

/**
* @param String
* @return Mixed
*/
static function getOption($optionName) {
return SSViewer::$options[$optionName];
}

protected static $options = array(
'rewriteHashlinks' => true,
);
    
protected static $topLevel = array();
public static function topLevel() {
if(SSViewer::$topLevel) {
return SSViewer::$topLevel[sizeof(SSViewer::$topLevel)-1];
}
}

/**
* Call this to disable rewriting of <a href="#xxx"> links. This is useful in Ajax applications.
* It returns the SSViewer objects, so that you can call new SSViewer("X")->dontRewriteHashlinks()->process();
*/
public function dontRewriteHashlinks() {
$this->rewriteHashlinks = false;
self::$options['rewriteHashlinks'] = false;
return $this;
}

public function exists() {
return $this->chosenTemplates;
}

/**
* @param string $identifier A template name without '.ss' extension or path
* @param string $type The template type, either "main", "Includes" or "Layout"
* @return string Full system path to a template file
*/
public static function getTemplateFileByType($identifier, $type) {
$loader = SS_TemplateLoader::instance();
$found = $loader->findTemplates("$type/$identifier", self::current_theme());

if ($found) {
return $found['main'];
}
}

/**
* @ignore
*/
static private $flushed = false;

/**
* Clears all parsed template files in the cache folder.
*
* Can only be called once per request (there may be multiple SSViewer instances).
*/
static function flush_template_cache() {
if (!self::$flushed) {
$dir = dir(TEMP_FOLDER);
while (false !== ($file = $dir->read())) {
if (strstr($file, '.cache')) { unlink(TEMP_FOLDER.'/'.$file); }
}
self::$flushed = true;
}
}

/**
* @var Zend_Cache_Core
*/
protected $partialCacheStore = null;

/**
* Set the cache object to use when storing / retrieving partial cache blocks.
* @param Zend_Cache_Core $cache
*/
public function setPartialCacheStore($cache) {
$this->partialCacheStore = $cache;
}

/**
* Get the cache object to use when storing / retrieving partial cache blocks
* @return Zend_Cache_Core
*/
public function getPartialCacheStore() {
return $this->partialCacheStore ? $this->partialCacheStore : SS_Cache::factory('cacheblock');
}

/**
* An internal utility function to set up variables in preparation for including a compiled
* template, then do the include
*
* Effectively this is the common code that both SSViewer#process and SSViewer_FromString#process call
*
* @param string $cacheFile - The path to the file that contains the template compiled to PHP
* @param Object $item - The item to use as the root scope for the template
* @param array|null $overlay - Any variables to layer on top of the scope
* @param array|null $underlay - Any variables to layer underneath the scope
* @return string - The result of executing the template
*/
protected function includeGeneratedTemplate($cacheFile, $item, $overlay, $underlay) {
if(isset($_GET['showtemplate']) && $_GET['showtemplate']) {
$lines = file($cacheFile);
echo "<h2>Template: $cacheFile</h2>";
echo "<pre>";
foreach($lines as $num => $line) {
echo str_pad($num+1,5) . htmlentities($line, ENT_COMPAT, 'UTF-8');
}
echo "</pre>";
}

$cache = $this->getPartialCacheStore();
$scope = new SSViewer_DataPresenter($item, $overlay, $underlay);
$val = '';

include($cacheFile);

return $val;
}

/**
* The process() method handles the "meat" of the template processing.
* It takes care of caching the output (via {@link SS_Cache}),
* as well as replacing the special "$Content" and "$Layout"
* placeholders with their respective subtemplates.
* The method injects extra HTML in the header via {@link Requirements::includeInHTML()}.
*
* Note: You can call this method indirectly by {@link ViewableData->renderWith()}.
*
* @param ViewableData $item
* @param SS_Cache $cache Optional cache backend
* @return String Parsed template output.
*/
public function process($item, $arguments = null) {
SSViewer::$topLevel[] = $item;

if ($arguments && $arguments instanceof Zend_Cache_Core) {
Deprecation::notice('3.0', 'Use setPartialCacheStore to override the partial cache storage backend, the second argument to process is now an array of variables.');
$this->setPartialCacheStore($arguments);
$arguments = null;
}

if(isset($this->chosenTemplates['main'])) {
$template = $this->chosenTemplates['main'];
} else {
$keys = array_keys($this->chosenTemplates);
$key = reset($keys);
$template = $this->chosenTemplates[$key];
}

if(isset($_GET['debug_profile'])) Profiler::mark("SSViewer::process", " for $template");
$cacheFile = TEMP_FOLDER . "/.cache" . str_replace(array('\\','/',':'), '.', Director::makeRelative(realpath($template)));

$lastEdited = filemtime($template);

if(!file_exists($cacheFile) || filemtime($cacheFile) < $lastEdited || isset($_GET['flush'])) {
if(isset($_GET['debug_profile'])) Profiler::mark("SSViewer::process - compile", " for $template");

$content = file_get_contents($template);
$content = SSViewer::parseTemplateContent($content, $template);

$fh = fopen($cacheFile,'w');
fwrite($fh, $content);
fclose($fh);

if(isset($_GET['debug_profile'])) Profiler::unmark("SSViewer::process - compile", " for $template");
}

$underlay = array('I18NNamespace' => basename($template));

// Makes the rendered sub-templates available on the parent item,
// through $Content and $Layout placeholders.
foreach(array('Content', 'Layout') as $subtemplate) {
if(isset($this->chosenTemplates[$subtemplate])) {
$subtemplateViewer = new SSViewer($this->chosenTemplates[$subtemplate]);
$subtemplateViewer->setPartialCacheStore($this->getPartialCacheStore());

$underlay[$subtemplate] = $subtemplateViewer->process($item, $arguments);
}
}

$val = $this->includeGeneratedTemplate($cacheFile, $item, $arguments, $underlay);
$output = Requirements::includeInHTML($template, $val);

array_pop(SSViewer::$topLevel);

if(isset($_GET['debug_profile'])) Profiler::unmark("SSViewer::process", " for $template");

// If we have our crazy base tag, then fix # links referencing the current page.
if($this->rewriteHashlinks && self::$options['rewriteHashlinks']) {
if(strpos($output, '<base') !== false) {
if(SSViewer::$options['rewriteHashlinks'] === 'php') {
$thisURLRelativeToBase = "<?php echo strip_tags(\$_SERVER['REQUEST_URI']); ?>";
} else {
$thisURLRelativeToBase = strip_tags($_SERVER['REQUEST_URI']);
}
$output = preg_replace('/(<a[^>]+href *= *)"#/i', '\\1"' . $thisURLRelativeToBase . '#', $output);
}
}

return $output;
}

/**
* Execute the given template, passing it the given data.
* Used by the <% include %> template tag to process templates.
*/
static function execute_template($template, $data, $arguments = null) {
$v = new SSViewer($template);
return $v->process($data, $arguments);
}

static function parseTemplateContent($content, $template="") {
return SSTemplateParser::compileString($content, $template, Director::isDev() && self::$source_file_comments);
}

/**
* Returns the filenames of the template that will be rendered. It is a map that may contain
* 'Content' & 'Layout', and will have to contain 'main'
*/
public function templates() {
return $this->chosenTemplates;
}

/**
* @param string $type "Layout" or "main"
* @param string $file Full system path to the template file
*/
public function setTemplateFile($type, $file) {
$this->chosenTemplates[$type] = $file;
}

/**
* Return an appropriate base tag for the given template.
* It will be closed on an XHTML document, and unclosed on an HTML document.
*
* @param $contentGeneratedSoFar The content of the template generated so far; it should contain
* the DOCTYPE declaration.
*/
static function get_base_tag($contentGeneratedSoFar) {
$base = Director::absoluteBaseURL();

// Is the document XHTML?
if(preg_match('/<!DOCTYPE[^>]+xhtml/i', $contentGeneratedSoFar)) {
return "<base href=\"$base\" />";
} else {
return "<base href=\"$base\"><!--[if lte IE 6]></base><![endif]-->";
}
}
}

/**
* Special SSViewer that will process a template passed as a string, rather than a filename.
* @package framework
* @subpackage view
*/
class SSViewer_FromString extends SSViewer {
protected $content;

public function __construct($content) {
$this->content = $content;
}

public function process($item, $arguments = null) {
if ($arguments && $arguments instanceof Zend_Cache_Core) {
Deprecation::notice('3.0', 'Use setPartialCacheStore to override the partial cache storage backend, the second argument to process is now an array of variables.');
$this->setPartialCacheStore($arguments);
$arguments = null;
}

$template = SSViewer::parseTemplateContent($this->content, "string sha1=".sha1($this->content));

$tmpFile = tempnam(TEMP_FOLDER,"");
$fh = fopen($tmpFile, 'w');
fwrite($fh, $template);
fclose($fh);

$val = $this->includeGeneratedTemplate($tmpFile, $item, $arguments, null);

unlink($tmpFile);
return $val;
}
}
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