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wallabag/inc/rain.tpl.class.php

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2013-04-03 13:14:01 +00:00
<?php
/**
* RainTPL
* -------
* Realized by Federico Ulfo & maintained by the Rain Team
* Distributed under GNU/LGPL 3 License
*
* @version 2.7.2
*/
class RainTPL{
// -------------------------
// CONFIGURATION
// -------------------------
/**
* Template directory
*
* @var string
*/
static $tpl_dir = "tpl/";
/**
* Cache directory. Is the directory where RainTPL will compile the template and save the cache
*
* @var string
*/
static $cache_dir = "tmp/";
/**
* Template base URL. RainTPL will add this URL to the relative paths of element selected in $path_replace_list.
*
* @var string
*/
static $base_url = null;
/**
* Template extension.
*
* @var string
*/
static $tpl_ext = "html";
/**
* Path replace is a cool features that replace all relative paths of images (<img src="...">), stylesheet (<link href="...">), script (<script src="...">) and link (<a href="...">)
* Set true to enable the path replace.
*
* @var unknown_type
*/
static $path_replace = true;
/**
* You can set what the path_replace method will replace.
* Avaible options: a, img, link, script, input
*
* @var array
*/
static $path_replace_list = array( 'a', 'img', 'link', 'script', 'input' );
/**
* You can define in the black list what string are disabled into the template tags
*
* @var unknown_type
*/
static $black_list = array( '\$this', 'raintpl::', 'self::', '_SESSION', '_SERVER', '_ENV', 'eval', 'exec', 'unlink', 'rmdir' );
/**
* Check template.
* true: checks template update time, if changed it compile them
* false: loads the compiled template. Set false if server doesn't have write permission for cache_directory.
*
*/
static $check_template_update = true;
/**
* PHP tags <? ?>
* True: php tags are enabled into the template
* False: php tags are disabled into the template and rendered as html
*
* @var bool
*/
static $php_enabled = false;
/**
* Debug mode flag.
* True: debug mode is used, syntax errors are displayed directly in template. Execution of script is not terminated.
* False: exception is thrown on found error.
*
* @var bool
*/
static $debug = false;
// -------------------------
// -------------------------
// RAINTPL VARIABLES
// -------------------------
/**
* Is the array where RainTPL keep the variables assigned
*
* @var array
*/
public $var = array();
protected $tpl = array(), // variables to keep the template directories and info
$cache = false, // static cache enabled / disabled
$cache_id = null; // identify only one cache
protected static $config_name_sum = array(); // takes all the config to create the md5 of the file
// -------------------------
const CACHE_EXPIRE_TIME = 3600; // default cache expire time = hour
/**
* Assign variable
* eg. $t->assign('name','mickey');
*
* @param mixed $variable_name Name of template variable or associative array name/value
* @param mixed $value value assigned to this variable. Not set if variable_name is an associative array
*/
function assign( $variable, $value = null ){
if( is_array( $variable ) )
$this->var += $variable;
else
$this->var[ $variable ] = $value;
}
/**
* Draw the template
* eg. $html = $tpl->draw( 'demo', TRUE ); // return template in string
* or $tpl->draw( $tpl_name ); // echo the template
*
* @param string $tpl_name template to load
* @param boolean $return_string true=return a string, false=echo the template
* @return string
*/
function draw( $tpl_name, $return_string = false ){
try {
// compile the template if necessary and set the template filepath
$this->check_template( $tpl_name );
} catch (RainTpl_Exception $e) {
$output = $this->printDebug($e);
die($output);
}
// Cache is off and, return_string is false
// Rain just echo the template
if( !$this->cache && !$return_string ){
extract( $this->var );
include $this->tpl['compiled_filename'];
unset( $this->tpl );
}
// cache or return_string are enabled
// rain get the output buffer to save the output in the cache or to return it as string
else{
//----------------------
// get the output buffer
//----------------------
ob_start();
extract( $this->var );
include $this->tpl['compiled_filename'];
$raintpl_contents = ob_get_clean();
//----------------------
// save the output in the cache
if( $this->cache )
file_put_contents( $this->tpl['cache_filename'], "<?php if(!class_exists('raintpl')){exit;}?>" . $raintpl_contents );
// free memory
unset( $this->tpl );
// return or print the template
if( $return_string ) return $raintpl_contents; else echo $raintpl_contents;
}
}
/**
* If exists a valid cache for this template it returns the cache
*
* @param string $tpl_name Name of template (set the same of draw)
* @param int $expiration_time Set after how many seconds the cache expire and must be regenerated
* @return string it return the HTML or null if the cache must be recreated
*/
function cache( $tpl_name, $expire_time = self::CACHE_EXPIRE_TIME, $cache_id = null ){
// set the cache_id
$this->cache_id = $cache_id;
if( !$this->check_template( $tpl_name ) && file_exists( $this->tpl['cache_filename'] ) && ( time() - filemtime( $this->tpl['cache_filename'] ) < $expire_time ) )
return substr( file_get_contents( $this->tpl['cache_filename'] ), 43 );
else{
//delete the cache of the selected template
if (file_exists($this->tpl['cache_filename']))
unlink($this->tpl['cache_filename'] );
$this->cache = true;
}
}
/**
* Configure the settings of RainTPL
*
*/
static function configure( $setting, $value = null ){
if( is_array( $setting ) )
foreach( $setting as $key => $value )
self::configure( $key, $value );
else if( property_exists( __CLASS__, $setting ) ){
self::$$setting = $value;
self::$config_name_sum[ $setting ] = $value; // take trace of all config
}
}
// check if has to compile the template
// return true if the template has changed
protected function check_template( $tpl_name ){
if( !isset($this->tpl['checked']) ){
$tpl_basename = basename( $tpl_name ); // template basename
$tpl_basedir = strpos($tpl_name,"/") ? dirname($tpl_name) . '/' : null; // template basedirectory
$tpl_dir = self::$tpl_dir . $tpl_basedir; // template directory
$this->tpl['tpl_filename'] = $tpl_dir . $tpl_basename . '.' . self::$tpl_ext; // template filename
$temp_compiled_filename = self::$cache_dir . $tpl_basename . "." . md5( $tpl_dir . serialize(self::$config_name_sum));
$this->tpl['compiled_filename'] = $temp_compiled_filename . '.rtpl.php'; // cache filename
$this->tpl['cache_filename'] = $temp_compiled_filename . '.s_' . $this->cache_id . '.rtpl.php'; // static cache filename
// if the template doesn't exsist throw an error
if( self::$check_template_update && !file_exists( $this->tpl['tpl_filename'] ) ){
$e = new RainTpl_NotFoundException( 'Template '. $tpl_basename .' not found!' );
throw $e->setTemplateFile($this->tpl['tpl_filename']);
}
// file doesn't exsist, or the template was updated, Rain will compile the template
if( !file_exists( $this->tpl['compiled_filename'] ) || ( self::$check_template_update && filemtime($this->tpl['compiled_filename']) < filemtime( $this->tpl['tpl_filename'] ) ) ){
$this->compileFile( $tpl_basename, $tpl_basedir, $this->tpl['tpl_filename'], self::$cache_dir, $this->tpl['compiled_filename'] );
return true;
}
$this->tpl['checked'] = true;
}
}
/**
* execute stripslaches() on the xml block. Invoqued by preg_replace_callback function below
* @access protected
*/
protected function xml_reSubstitution($capture) {
return "<?php echo '<?xml ".stripslashes($capture[1])." ?>'; ?>";
}
/**
* Compile and write the compiled template file
* @access protected
*/
protected function compileFile( $tpl_basename, $tpl_basedir, $tpl_filename, $cache_dir, $compiled_filename ){
//read template file
$this->tpl['source'] = $template_code = file_get_contents( $tpl_filename );
//xml substitution
$template_code = preg_replace( "/<\?xml(.*?)\?>/s", "##XML\\1XML##", $template_code );
//disable php tag
if( !self::$php_enabled )
$template_code = str_replace( array("<?","?>"), array("&lt;?","?&gt;"), $template_code );
//xml re-substitution
$template_code = preg_replace_callback ( "/##XML(.*?)XML##/s", array($this, 'xml_reSubstitution'), $template_code );
//compile template
$template_compiled = "<?php if(!class_exists('raintpl')){exit;}?>" . $this->compileTemplate( $template_code, $tpl_basedir );
// fix the php-eating-newline-after-closing-tag-problem
$template_compiled = str_replace( "?>\n", "?>\n\n", $template_compiled );
// create directories
if( !is_dir( $cache_dir ) )
mkdir( $cache_dir, 0755, true );
if( !is_writable( $cache_dir ) )
throw new RainTpl_Exception ('Cache directory ' . $cache_dir . 'doesn\'t have write permission. Set write permission or set RAINTPL_CHECK_TEMPLATE_UPDATE to false. More details on http://www.raintpl.com/Documentation/Documentation-for-PHP-developers/Configuration/');
//write compiled file
file_put_contents( $compiled_filename, $template_compiled );
}
/**
* Compile template
* @access protected
*/
protected function compileTemplate( $template_code, $tpl_basedir ){
//tag list
$tag_regexp = array( 'loop' => '(\{loop(?: name){0,1}="\${0,1}[^"]*"\})',
'loop_close' => '(\{\/loop\})',
'if' => '(\{if(?: condition){0,1}="[^"]*"\})',
'elseif' => '(\{elseif(?: condition){0,1}="[^"]*"\})',
'else' => '(\{else\})',
'if_close' => '(\{\/if\})',
'function' => '(\{function="[^"]*"\})',
'noparse' => '(\{noparse\})',
'noparse_close'=> '(\{\/noparse\})',
'ignore' => '(\{ignore\}|\{\*)',
'ignore_close' => '(\{\/ignore\}|\*\})',
'include' => '(\{include="[^"]*"(?: cache="[^"]*")?\})',
'template_info'=> '(\{\$template_info\})',
'function' => '(\{function="(\w*?)(?:.*?)"\})'
);
$tag_regexp = "/" . join( "|", $tag_regexp ) . "/";
//split the code with the tags regexp
$template_code = preg_split ( $tag_regexp, $template_code, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
//path replace (src of img, background and href of link)
$template_code = $this->path_replace( $template_code, $tpl_basedir );
//compile the code
$compiled_code = $this->compileCode( $template_code );
//return the compiled code
return $compiled_code;
}
/**
* Compile the code
* @access protected
*/
protected function compileCode( $parsed_code ){
//variables initialization
$compiled_code = $open_if = $comment_is_open = $ignore_is_open = null;
$loop_level = 0;
//read all parsed code
while( $html = array_shift( $parsed_code ) ){
//close ignore tag
if( !$comment_is_open && ( strpos( $html, '{/ignore}' ) !== FALSE || strpos( $html, '*}' ) !== FALSE ) )
$ignore_is_open = false;
//code between tag ignore id deleted
elseif( $ignore_is_open ){
//ignore the code
}
//close no parse tag
elseif( strpos( $html, '{/noparse}' ) !== FALSE )
$comment_is_open = false;
//code between tag noparse is not compiled
elseif( $comment_is_open )
$compiled_code .= $html;
//ignore
elseif( strpos( $html, '{ignore}' ) !== FALSE || strpos( $html, '{*' ) !== FALSE )
$ignore_is_open = true;
//noparse
elseif( strpos( $html, '{noparse}' ) !== FALSE )
$comment_is_open = true;
//include tag
elseif( preg_match( '/\{include="([^"]*)"(?: cache="([^"]*)"){0,1}\}/', $html, $code ) ){
//variables substitution
$include_var = $this->var_replace( $code[ 1 ], $left_delimiter = null, $right_delimiter = null, $php_left_delimiter = '".' , $php_right_delimiter = '."', $loop_level );
// if the cache is active
if( isset($code[ 2 ]) ){
//dynamic include
$compiled_code .= '<?php $tpl = new '.get_class($this).';' .
'if( $cache = $tpl->cache( $template = basename("'.$include_var.'") ) )' .
' echo $cache;' .
'else{' .
' $tpl_dir_temp = self::$tpl_dir;' .
' $tpl->assign( $this->var );' .
( !$loop_level ? null : '$tpl->assign( "key", $key'.$loop_level.' ); $tpl->assign( "value", $value'.$loop_level.' );' ).
' $tpl->draw( dirname("'.$include_var.'") . ( substr("'.$include_var.'",-1,1) != "/" ? "/" : "" ) . basename("'.$include_var.'") );'.
'} ?>';
}
else{
//dynamic include
$compiled_code .= '<?php $tpl = new '.get_class($this).';' .
'$tpl_dir_temp = self::$tpl_dir;' .
'$tpl->assign( $this->var );' .
( !$loop_level ? null : '$tpl->assign( "key", $key'.$loop_level.' ); $tpl->assign( "value", $value'.$loop_level.' );' ).
'$tpl->draw( dirname("'.$include_var.'") . ( substr("'.$include_var.'",-1,1) != "/" ? "/" : "" ) . basename("'.$include_var.'") );'.
'?>';
}
}
//loop
elseif( preg_match( '/\{loop(?: name){0,1}="\${0,1}([^"]*)"\}/', $html, $code ) ){
//increase the loop counter
$loop_level++;
//replace the variable in the loop
$var = $this->var_replace( '$' . $code[ 1 ], $tag_left_delimiter=null, $tag_right_delimiter=null, $php_left_delimiter=null, $php_right_delimiter=null, $loop_level-1 );
//loop variables
$counter = "\$counter$loop_level"; // count iteration
$key = "\$key$loop_level"; // key
$value = "\$value$loop_level"; // value
//loop code
$compiled_code .= "<?php $counter=-1; if( isset($var) && is_array($var) && sizeof($var) ) foreach( $var as $key => $value ){ $counter++; ?>";
}
//close loop tag
elseif( strpos( $html, '{/loop}' ) !== FALSE ) {
//iterator
$counter = "\$counter$loop_level";
//decrease the loop counter
$loop_level--;
//close loop code
$compiled_code .= "<?php } ?>";
}
//if
elseif( preg_match( '/\{if(?: condition){0,1}="([^"]*)"\}/', $html, $code ) ){
//increase open if counter (for intendation)
$open_if++;
//tag
$tag = $code[ 0 ];
//condition attribute
$condition = $code[ 1 ];
// check if there's any function disabled by black_list
$this->function_check( $tag );
//variable substitution into condition (no delimiter into the condition)
$parsed_condition = $this->var_replace( $condition, $tag_left_delimiter = null, $tag_right_delimiter = null, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level );
//if code
$compiled_code .= "<?php if( $parsed_condition ){ ?>";
}
//elseif
elseif( preg_match( '/\{elseif(?: condition){0,1}="([^"]*)"\}/', $html, $code ) ){
//tag
$tag = $code[ 0 ];
//condition attribute
$condition = $code[ 1 ];
//variable substitution into condition (no delimiter into the condition)
$parsed_condition = $this->var_replace( $condition, $tag_left_delimiter = null, $tag_right_delimiter = null, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level );
//elseif code
$compiled_code .= "<?php }elseif( $parsed_condition ){ ?>";
}
//else
elseif( strpos( $html, '{else}' ) !== FALSE ) {
//else code
$compiled_code .= '<?php }else{ ?>';
}
//close if tag
elseif( strpos( $html, '{/if}' ) !== FALSE ) {
//decrease if counter
$open_if--;
// close if code
$compiled_code .= '<?php } ?>';
}
//function
elseif( preg_match( '/\{function="(\w*)(.*?)"\}/', $html, $code ) ){
//tag
$tag = $code[ 0 ];
//function
$function = $code[ 1 ];
// check if there's any function disabled by black_list
$this->function_check( $tag );
if( empty( $code[ 2 ] ) )
$parsed_function = $function . "()";
else
// parse the function
$parsed_function = $function . $this->var_replace( $code[ 2 ], $tag_left_delimiter = null, $tag_right_delimiter = null, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level );
//if code
$compiled_code .= "<?php echo $parsed_function; ?>";
}
// show all vars
elseif ( strpos( $html, '{$template_info}' ) !== FALSE ) {
//tag
$tag = '{$template_info}';
//if code
$compiled_code .= '<?php echo "<pre>"; print_r( $this->var ); echo "</pre>"; ?>';
}
//all html code
else{
//variables substitution (es. {$title})
$html = $this->var_replace( $html, $left_delimiter = '\{', $right_delimiter = '\}', $php_left_delimiter = '<?php ', $php_right_delimiter = ';?>', $loop_level, $echo = true );
//const substitution (es. {#CONST#})
$html = $this->const_replace( $html, $left_delimiter = '\{', $right_delimiter = '\}', $php_left_delimiter = '<?php ', $php_right_delimiter = ';?>', $loop_level, $echo = true );
//functions substitution (es. {"string"|functions})
$compiled_code .= $this->func_replace( $html, $left_delimiter = '\{', $right_delimiter = '\}', $php_left_delimiter = '<?php ', $php_right_delimiter = ';?>', $loop_level, $echo = true );
}
}
if( $open_if > 0 ) {
$e = new RainTpl_SyntaxException('Error! You need to close an {if} tag in ' . $this->tpl['tpl_filename'] . ' template');
throw $e->setTemplateFile($this->tpl['tpl_filename']);
}
return $compiled_code;
}
/**
* Reduce a path, eg. www/library/../filepath//file => www/filepath/file
* @param type $path
* @return type
*/
protected function reduce_path( $path ){
$path = str_replace( "://", "@not_replace@", $path );
$path = str_replace( "//", "/", $path );
$path = str_replace( "@not_replace@", "://", $path );
return preg_replace('/\w+\/\.\.\//', '', $path );
}
/**
* replace the path of image src, link href and a href.
* url => template_dir/url
* url# => url
* http://url => http://url
*
* @param string $html
* @return string html sostituito
*/
protected function path_replace( $html, $tpl_basedir ){
if( self::$path_replace ){
$tpl_dir = self::$base_url . self::$tpl_dir . $tpl_basedir;
// reduce the path
$path = $this->reduce_path($tpl_dir);
$exp = $sub = array();
if( in_array( "img", self::$path_replace_list ) ){
$exp = array( '/<img(.*?)src=(?:")(http|https)\:\/\/([^"]+?)(?:")/i', '/<img(.*?)src=(?:")([^"]+?)#(?:")/i', '/<img(.*?)src="(.*?)"/', '/<img(.*?)src=(?:\@)([^"]+?)(?:\@)/i' );
$sub = array( '<img$1src=@$2://$3@', '<img$1src=@$2@', '<img$1src="' . $path . '$2"', '<img$1src="$2"' );
}
if( in_array( "script", self::$path_replace_list ) ){
$exp = array_merge( $exp , array( '/<script(.*?)src=(?:")(http|https)\:\/\/([^"]+?)(?:")/i', '/<script(.*?)src=(?:")([^"]+?)#(?:")/i', '/<script(.*?)src="(.*?)"/', '/<script(.*?)src=(?:\@)([^"]+?)(?:\@)/i' ) );
$sub = array_merge( $sub , array( '<script$1src=@$2://$3@', '<script$1src=@$2@', '<script$1src="' . $path . '$2"', '<script$1src="$2"' ) );
}
if( in_array( "link", self::$path_replace_list ) ){
$exp = array_merge( $exp , array( '/<link(.*?)href=(?:")(http|https)\:\/\/([^"]+?)(?:")/i', '/<link(.*?)href=(?:")([^"]+?)#(?:")/i', '/<link(.*?)href="(.*?)"/', '/<link(.*?)href=(?:\@)([^"]+?)(?:\@)/i' ) );
$sub = array_merge( $sub , array( '<link$1href=@$2://$3@', '<link$1href=@$2@' , '<link$1href="' . $path . '$2"', '<link$1href="$2"' ) );
}
if( in_array( "a", self::$path_replace_list ) ){
$exp = array_merge( $exp , array( '/<a(.*?)href=(?:")(http\:\/\/|https\:\/\/|javascript:)([^"]+?)(?:")/i', '/<a(.*?)href="(.*?)"/', '/<a(.*?)href=(?:\@)([^"]+?)(?:\@)/i' ) );
$sub = array_merge( $sub , array( '<a$1href=@$2$3@', '<a$1href="' . self::$base_url . '$2"', '<a$1href="$2"' ) );
}
if( in_array( "input", self::$path_replace_list ) ){
$exp = array_merge( $exp , array( '/<input(.*?)src=(?:")(http|https)\:\/\/([^"]+?)(?:")/i', '/<input(.*?)src=(?:")([^"]+?)#(?:")/i', '/<input(.*?)src="(.*?)"/', '/<input(.*?)src=(?:\@)([^"]+?)(?:\@)/i' ) );
$sub = array_merge( $sub , array( '<input$1src=@$2://$3@', '<input$1src=@$2@', '<input$1src="' . $path . '$2"', '<input$1src="$2"' ) );
}
return preg_replace( $exp, $sub, $html );
}
else
return $html;
}
// replace const
function const_replace( $html, $tag_left_delimiter, $tag_right_delimiter, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level = null, $echo = null ){
// const
return preg_replace( '/\{\#(\w+)\#{0,1}\}/', $php_left_delimiter . ( $echo ? " echo " : null ) . '\\1' . $php_right_delimiter, $html );
}
// replace functions/modifiers on constants and strings
function func_replace( $html, $tag_left_delimiter, $tag_right_delimiter, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level = null, $echo = null ){
preg_match_all( '/' . '\{\#{0,1}(\"{0,1}.*?\"{0,1})(\|\w.*?)\#{0,1}\}' . '/', $html, $matches );
for( $i=0, $n=count($matches[0]); $i<$n; $i++ ){
//complete tag ex: {$news.title|substr:0,100}
$tag = $matches[ 0 ][ $i ];
//variable name ex: news.title
$var = $matches[ 1 ][ $i ];
//function and parameters associate to the variable ex: substr:0,100
$extra_var = $matches[ 2 ][ $i ];
// check if there's any function disabled by black_list
$this->function_check( $tag );
$extra_var = $this->var_replace( $extra_var, null, null, null, null, $loop_level );
// check if there's an operator = in the variable tags, if there's this is an initialization so it will not output any value
$is_init_variable = preg_match( "/^(\s*?)\=[^=](.*?)$/", $extra_var );
//function associate to variable
$function_var = ( $extra_var and $extra_var[0] == '|') ? substr( $extra_var, 1 ) : null;
//variable path split array (ex. $news.title o $news[title]) or object (ex. $news->title)
$temp = preg_split( "/\.|\[|\-\>/", $var );
//variable name
$var_name = $temp[ 0 ];
//variable path
$variable_path = substr( $var, strlen( $var_name ) );
//parentesis transform [ e ] in [" e in "]
$variable_path = str_replace( '[', '["', $variable_path );
$variable_path = str_replace( ']', '"]', $variable_path );
//transform .$variable in ["$variable"]
$variable_path = preg_replace('/\.\$(\w+)/', '["$\\1"]', $variable_path );
//transform [variable] in ["variable"]
$variable_path = preg_replace('/\.(\w+)/', '["\\1"]', $variable_path );
//if there's a function
if( $function_var ){
// check if there's a function or a static method and separate, function by parameters
$function_var = str_replace("::", "@double_dot@", $function_var );
// get the position of the first :
if( $dot_position = strpos( $function_var, ":" ) ){
// get the function and the parameters
$function = substr( $function_var, 0, $dot_position );
$params = substr( $function_var, $dot_position+1 );
}
else{
//get the function
$function = str_replace( "@double_dot@", "::", $function_var );
$params = null;
}
// replace back the @double_dot@ with ::
$function = str_replace( "@double_dot@", "::", $function );
$params = str_replace( "@double_dot@", "::", $params );
}
else
$function = $params = null;
$php_var = $var_name . $variable_path;
// compile the variable for php
if( isset( $function ) ){
if( $php_var )
$php_var = $php_left_delimiter . ( !$is_init_variable && $echo ? 'echo ' : null ) . ( $params ? "( $function( $php_var, $params ) )" : "$function( $php_var )" ) . $php_right_delimiter;
else
$php_var = $php_left_delimiter . ( !$is_init_variable && $echo ? 'echo ' : null ) . ( $params ? "( $function( $params ) )" : "$function()" ) . $php_right_delimiter;
}
else
$php_var = $php_left_delimiter . ( !$is_init_variable && $echo ? 'echo ' : null ) . $php_var . $extra_var . $php_right_delimiter;
$html = str_replace( $tag, $php_var, $html );
}
return $html;
}
function var_replace( $html, $tag_left_delimiter, $tag_right_delimiter, $php_left_delimiter = null, $php_right_delimiter = null, $loop_level = null, $echo = null ){
//all variables
if( preg_match_all( '/' . $tag_left_delimiter . '\$(\w+(?:\.\${0,1}[A-Za-z0-9_]+)*(?:(?:\[\${0,1}[A-Za-z0-9_]+\])|(?:\-\>\${0,1}[A-Za-z0-9_]+))*)(.*?)' . $tag_right_delimiter . '/', $html, $matches ) ){
for( $parsed=array(), $i=0, $n=count($matches[0]); $i<$n; $i++ )
$parsed[$matches[0][$i]] = array('var'=>$matches[1][$i],'extra_var'=>$matches[2][$i]);
foreach( $parsed as $tag => $array ){
//variable name ex: news.title
$var = $array['var'];
//function and parameters associate to the variable ex: substr:0,100
$extra_var = $array['extra_var'];
// check if there's any function disabled by black_list
$this->function_check( $tag );
$extra_var = $this->var_replace( $extra_var, null, null, null, null, $loop_level );
// check if there's an operator = in the variable tags, if there's this is an initialization so it will not output any value
$is_init_variable = preg_match( "/^[a-z_A-Z\.\[\](\-\>)]*=[^=]*$/", $extra_var );
//function associate to variable
$function_var = ( $extra_var and $extra_var[0] == '|') ? substr( $extra_var, 1 ) : null;
//variable path split array (ex. $news.title o $news[title]) or object (ex. $news->title)
$temp = preg_split( "/\.|\[|\-\>/", $var );
//variable name
$var_name = $temp[ 0 ];
//variable path
$variable_path = substr( $var, strlen( $var_name ) );
//parentesis transform [ e ] in [" e in "]
$variable_path = str_replace( '[', '["', $variable_path );
$variable_path = str_replace( ']', '"]', $variable_path );
//transform .$variable in ["$variable"] and .variable in ["variable"]
$variable_path = preg_replace('/\.(\${0,1}\w+)/', '["\\1"]', $variable_path );
// if is an assignment also assign the variable to $this->var['value']
if( $is_init_variable )
$extra_var = "=\$this->var['{$var_name}']{$variable_path}" . $extra_var;
//if there's a function
if( $function_var ){
// check if there's a function or a static method and separate, function by parameters
$function_var = str_replace("::", "@double_dot@", $function_var );
// get the position of the first :
if( $dot_position = strpos( $function_var, ":" ) ){
// get the function and the parameters
$function = substr( $function_var, 0, $dot_position );
$params = substr( $function_var, $dot_position+1 );
}
else{
//get the function
$function = str_replace( "@double_dot@", "::", $function_var );
$params = null;
}
// replace back the @double_dot@ with ::
$function = str_replace( "@double_dot@", "::", $function );
$params = str_replace( "@double_dot@", "::", $params );
}
else
$function = $params = null;
//if it is inside a loop
if( $loop_level ){
//verify the variable name
if( $var_name == 'key' )
$php_var = '$key' . $loop_level;
elseif( $var_name == 'value' )
$php_var = '$value' . $loop_level . $variable_path;
elseif( $var_name == 'counter' )
$php_var = '$counter' . $loop_level;
else
$php_var = '$' . $var_name . $variable_path;
}else
$php_var = '$' . $var_name . $variable_path;
// compile the variable for php
if( isset( $function ) )
$php_var = $php_left_delimiter . ( !$is_init_variable && $echo ? 'echo ' : null ) . ( $params ? "( $function( $php_var, $params ) )" : "$function( $php_var )" ) . $php_right_delimiter;
else
$php_var = $php_left_delimiter . ( !$is_init_variable && $echo ? 'echo ' : null ) . $php_var . $extra_var . $php_right_delimiter;
$html = str_replace( $tag, $php_var, $html );
}
}
return $html;
}
/**
* Check if function is in black list (sandbox)
*
* @param string $code
* @param string $tag
*/
protected function function_check( $code ){
$preg = '#(\W|\s)' . implode( '(\W|\s)|(\W|\s)', self::$black_list ) . '(\W|\s)#';
// check if the function is in the black list (or not in white list)
if( count(self::$black_list) && preg_match( $preg, $code, $match ) ){
// find the line of the error
$line = 0;
$rows=explode("\n",$this->tpl['source']);
while( !strpos($rows[$line],$code) )
$line++;
// stop the execution of the script
$e = new RainTpl_SyntaxException('Unallowed syntax in ' . $this->tpl['tpl_filename'] . ' template');
throw $e->setTemplateFile($this->tpl['tpl_filename'])
->setTag($code)
->setTemplateLine($line);
}
}
/**
* Prints debug info about exception or passes it further if debug is disabled.
*
* @param RainTpl_Exception $e
* @return string
*/
protected function printDebug(RainTpl_Exception $e){
if (!self::$debug) {
throw $e;
}
$output = sprintf('<h2>Exception: %s</h2><h3>%s</h3><p>template: %s</p>',
get_class($e),
$e->getMessage(),
$e->getTemplateFile()
);
if ($e instanceof RainTpl_SyntaxException) {
if (null != $e->getTemplateLine()) {
$output .= '<p>line: ' . $e->getTemplateLine() . '</p>';
}
if (null != $e->getTag()) {
$output .= '<p>in tag: ' . htmlspecialchars($e->getTag()) . '</p>';
}
if (null != $e->getTemplateLine() && null != $e->getTag()) {
$rows=explode("\n", htmlspecialchars($this->tpl['source']));
$rows[$e->getTemplateLine()] = '<font color=red>' . $rows[$e->getTemplateLine()] . '</font>';
$output .= '<h3>template code</h3>' . implode('<br />', $rows) . '</pre>';
}
}
$output .= sprintf('<h3>trace</h3><p>In %s on line %d</p><pre>%s</pre>',
$e->getFile(), $e->getLine(),
nl2br(htmlspecialchars($e->getTraceAsString()))
);
return $output;
}
}
/**
* Basic Rain tpl exception.
*/
class RainTpl_Exception extends Exception{
/**
* Path of template file with error.
*/
protected $templateFile = '';
/**
* Returns path of template file with error.
*
* @return string
*/
public function getTemplateFile()
{
return $this->templateFile;
}
/**
* Sets path of template file with error.
*
* @param string $templateFile
* @return RainTpl_Exception
*/
public function setTemplateFile($templateFile)
{
$this->templateFile = (string) $templateFile;
return $this;
}
}
/**
* Exception thrown when template file does not exists.
*/
class RainTpl_NotFoundException extends RainTpl_Exception{
}
/**
* Exception thrown when syntax error occurs.
*/
class RainTpl_SyntaxException extends RainTpl_Exception{
/**
* Line in template file where error has occured.
*
* @var int | null
*/
protected $templateLine = null;
/**
* Tag which caused an error.
*
* @var string | null
*/
protected $tag = null;
/**
* Returns line in template file where error has occured
* or null if line is not defined.
*
* @return int | null
*/
public function getTemplateLine()
{
return $this->templateLine;
}
/**
* Sets line in template file where error has occured.
*
* @param int $templateLine
* @return RainTpl_SyntaxException
*/
public function setTemplateLine($templateLine)
{
$this->templateLine = (int) $templateLine;
return $this;
}
/**
* Returns tag which caused an error.
*
* @return string
*/
public function getTag()
{
return $this->tag;
}
/**
* Sets tag which caused an error.
*
* @param string $tag
* @return RainTpl_SyntaxException
*/
public function setTag($tag)
{
$this->tag = (string) $tag;
return $this;
}
}
// -- end
Reference in a new issue Copy permalink