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Parser_PHP.php
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<?php
/**
* COMPER Template Parser Class
*
* Parsing templates
*
* @subpackage Libraries
* @author Tomáš Bončo
* @category Parser
* @link https://github.com/TomasBonco/comper-template-parser/
* @year 2014
* @version 3.0.1
*
*
* Special thanks to God for talent, family for supporting me and community for motivating me and also:
* Character Art: http://bit.ly/MBTCVq
*/
class parser
{
private $data;
private $config;
public $content; // Output
function __construct()
{
$this->classname = get_class($this);
$this->_default();
}
/**
* parse()
*
* @access public
* @param string
* @param array
* @param array
* @return string
*
* Parses file or string
*
* */
public function parse($input, $data = array(), $config = array())
{
if (empty($data)) $data = array();
if (empty($config)) $config = array();
if ( ! empty( $data ) && is_object( $data) )
{
$data = json_decode(json_encode($data), TRUE );
}
if ( is_string($input) && strlen($input) > 0 && is_array($data) && is_array($config))
{
$this->_set_config($config);
if ($this->config->is_string == TRUE) // ... is first parameter string (or file) ?
{
if ( strlen(trim($input)) > 0 )
{
$this->data->input = $input;
}
else
{
return FALSE;
}
}
else
{
if ($this->config->suffix_theme_only)
{
if (empty($this->config->theme))
{
$this->config->template_suffix = NULL;
}
}
$this->config->file = $this->_path(TRUE) . $this->config->theme . '/' . $this->config->template_suffix . '/' . $input . '.' . $this->config->extension;
$this->config->folder = $this->_path() . $this->config->theme;
if ( ! $this->data->input = (string) $this->read_file($this->config->file) )
{
die('Template not found: '. $this->reduce_double_slashes( $this->config->file ));
return FALSE;
}
if ( ! (strlen($this->data->input) > 0))
{
return FALSE;
}
}
$this->input = new stdClass;
$this->input->data = $data;
$this->input->config = $config;
foreach ($data as $data_key => $data_value) // let's prepare our data
{
if (is_array($data_value))
{
$this->data->cycles[$data_key] = $data_value;
}
elseif (is_bool($data_value))
{
$this->data->conditions[$data_key] = $data_value;
$this->data->variables[$data_key] = $data_value;
}
else
{
$this->data->variables[$data_key] = $data_value;
}
}
foreach ($this->config->append as $app_name => $app_content)
{
if (isset($app_name) && is_string($app_name) && isset($app_content) && is_array($app_content))
{
$this->data->append[$app_name] = $app_content;
}
}
$this->_no_code();
if ($this->config->disable_cycles === FALSE) $this->_cycles();
if ($this->config->disable_conditions === FALSE) $this->_conditions();
if ($this->config->disable_variables === FALSE) $this->_variables();
if ($this->config->disable_includes === FALSE) $this->data->input = $this->_includes( $this->data->input, TRUE );
$this->_show();
$append = $this->data->append;
$this->_default();
$this->data->append = $append;
return $this->content;
}
else
{
return FALSE;
}
}
/**
* theme()
*
* @access public
* @param string
* @return bool
*
* Sets color theme
*
* */
public function theme($value)
{
if (is_dir(APPPATH . 'views/' . $value))
{
$this->config->theme = $value;
return TRUE;
}
return FALSE;
}
/**
* append()
*
* @access public
* @param string
* @param array
* @return bool
*
* Adds some extra variables
*
* */
public function append($name, $array = array())
{
if ( ! empty($name))
{
if ( is_array ($name))
{
$this->data->append += $name;
}
elseif ( is_array( $array ) )
{
$this->data->append[$name] = $array;
}
}
}
private function _no_code()
{
$this->data->input = preg_replace_callback('#<!--\s*NOCODE\s*-->(.*?)<!--\s*/NOCODE\s*-->#si', array($this->classname, '_no_code_content'), $this->data->input);
}
private function _no_code_content( $matches )
{
return sprintf('{nocode:%s}', base64_encode( $matches[1] ));
}
/**
* _includes()
*
* @access private
* @param string
* @param bool
* @return string
*
* Loads another template inside current template
*
*
* ,, ,,
* `7MMF' `7MM `7MM
* MM MM MM
* MM `7MMpMMMb. ,p6"bo MM `7MM `7MM ,M""bMM .gP"Ya ,pP"Ybd
* MM MM MM 6M' OO MM MM MM ,AP MM ,M' Yb 8I `"
* MM MM MM 8M MM MM MM 8MI MM 8M"""""" `YMMMa.
* MM MM MM YM. , MM MM MM `Mb MM YM. , L. I8
* .JMML..JMML JMML.YMbmd'.JMML. `Mbod"YML.`Wbmd"MML.`Mbmmd' M9mmmP'
*
*
* */
private function _includes( $context, $run_parser = FALSE )
{
## Sending data to callback function
$this->include = new stdClass;
$this->include->run_parser = $run_parser;
## Performing regular expressions
$context = preg_replace_callback('#<!--\s*INCLUDE\s*(.+?)\s*-->#i', array($this->classname, '_include_content'), $context, -1, $_replace_count);
if ( $_replace_count > 0 && preg_match('#<!--\s*INCLUDE\s*(.+?)\s*-->#i', $context) > 0) $context = $this->_includes( $context );
return $context;
}
/**
* _include_content()
*
* @access private
* @param array
* @return string
* @usage _include()
*
* Does including
*
* */
function _include_content( $matches )
{
$file = $matches[1];
$filename = $this->_path(TRUE) . $this->config->theme . '/' . $this->config->template_suffix . '/' . $file . '.' . $this->config->extension;
if ( $this->include->run_parser )
{
$parser = new $this->classname;
return $parser->parse( $file, $this->input->data, array( 'show' => FALSE, 'append' => $this->data->append, 'is_string' => FALSE ));
}
else
{
return (string) $this->read_file( $filename );
}
}
/**
* _cycles()
*
* @access private
* @return ---
*
* Provides cycling inside template
*
*
* ,,
* .g8"""bgd `7MM
* .dP' `M MM
* dM' ``7M' `MF',p6"bo MM .gP"Ya ,pP"Ybd
* MM VA ,V 6M' OO MM ,M' Yb 8I `"
* MM. VA ,V 8M MM 8M"""""" `YMMMa.
* `Mb. ,' VVV YM. , MM YM. , L. I8
* `"bmmmd' ,V YMbmd'.JMML.`Mbmmd' M9mmmP'
* ,V
* OOb"
*
*
* */
private function _cycles()
{
$this->data->input = preg_replace_callback('#<!--\s*BEGIN\s*([^!]+?)(\sAS\s*([^\>!\-]+?))?\s*-->(.*?)<!--\s*END\s*(\\1|\\3)\s*-->#si', array($this->classname, '_cycle_content'), $this->data->input, -1, $_replace_count);
if ( $_replace_count > 0 && preg_match('#<!--\s*BEGIN\s*([^!]+?)(\sAS\s*([^\>!\-]+?))?\s*-->(.*?)<!--\s*END\s*(\\1|\\3)\s*-->#si', $this->data->input) > 0) $this->_cycles();
}
/**
* _cycle_content()
*
* @access private
* @param array
* @return string
* @usage _cycle()
*
* Does cycling
*
**/
function _cycle_content($matches)
{
list($cycles, $subject,, $name, $content) = $matches;
$subject = $this->smart( $subject );
## We can cycle random array given
if ( strpos( $subject, '{array:') !== FALSE )
{
$array = json_decode( urldecode( substr( $subject, 7, -1 ) ), TRUE);
}
else
{
$array = (array) @$this->data->cycles[$subject];
}
if ( count($array) > 0 )
{
$buffer = '';
$i = 0;
foreach ( $array as $iteration )
{
$_content = $content;
$_alternative = array();
if ( ! empty( $iteration ) && is_object( $iteration) )
{
$iteration = json_decode(json_encode($iteration), TRUE );
}
$iteration['__i'] = $i;
## User can specify which cycle this variable belongs to like {cycle.name},
## this can be done by AS parater: <!-- BEGIN xyz AS cycle -->
## or just by creating cycle <!-- BEGIN cycle -->
## This code makes it work:
foreach ( $iteration as $item => $value)
{
$_alternative[ sprintf('%s.%s', ( ! empty($name) ? $name : $subject ), $item) ] = $value;
}
## Inside cycle there can be some Include calling, and it should work :)
$_content = $this->_includes( $_content );
## Time for smart engine :)
$_content = $this->smart( $_content, $iteration + $_alternative );
$buffer .= $_content;
$i++;
}
return $buffer;
}
return FALSE;
}
/**
* _conditions()
*
* @access private
* @return ---
*
* Provides conditions inside template
*
*
* ,, ,, ,,
* .g8"""bgd `7MM db mm db
* .dP' `M MM MM
* dM' ` ,pW"Wq.`7MMpMMMb. ,M""bMM `7MM mmMMmm `7MM ,pW"Wq.`7MMpMMMb. ,pP"Ybd
* MM 6W' `Wb MM MM ,AP MM MM MM MM 6W' `Wb MM MM 8I `"
* MM. 8M M8 MM MM 8MI MM MM MM MM 8M M8 MM MM `YMMMa.
* `Mb. ,'YA. ,A9 MM MM `Mb MM MM MM MM YA. ,A9 MM MM L. I8
* `"bmmmd' `Ybmd9'.JMML JMML.`Wbmd"MML..JMML. `Mbmo.JMML.`Ybmd9'.JMML JMML.M9mmmP'
*
*
* */
private function _conditions()
{
preg_match_all("#<!--\s*(IF|ELSEIF|ELSE|END)(.*?)\s*-->#i", $this->data->input, $options, PREG_OFFSET_CAPTURE );
if ( $options > 0 )
{
## Creates an array, when 0 is whole statement, 1 is IF | ELSEIF | ELSE or END and 2 is parameter
## Let's make it together
foreach ( $options[0] as $i => $option)
{
## Each of following arrays has two indexes: 0 - content, 1 - position
$this->_statement = $options[0][$i];
$_type = $options[1][$i];
$_parameter = $options[2][$i];
$type = strtoupper(trim($_type[0])); // contains IF, ELSEIF, ELSE or END
$_param ['statement'] = trim( $this->_statement[0] ); // <!-- IF is_admin -->
$_param ['type'] = trim( strtoupper( $_type[0] )); // IF
$_param ['param'] = trim( $_parameter[0] ); // is_admin
$_param ['start_position'] = $this->_statement[1]; // position of first char (<) of statement
$_param ['length'] = strlen( $_param['statement'] ); // length of statement
$_param ['end_position'] = $_param['start_position'] + $_param['length']; // position of last char (>) of statement
## When END keywords has some parameter, it's for cycles (BEGIN - END), not conditions
## that's why we need to ignore it
if ( $_param['type'] != 'END' || empty( $_param['param'] ))
{
$statement->{$type}[] = (object) $_param;
}
}
if ( isset($statement->IF) && count( $statement->IF ) > 0 )
{
## Reverses IFs, because will be matching last IF with nearest END
$statement->IF = array_reverse( $statement->IF );
## Let's do all dirty hob
foreach ( $statement->IF as $current_if )
{
## Matches IF with END and finds ELSEIFs and ELSE inside
$_current_data ['IF'] = $current_if;
$_current_data ['END'] = $this->_find_nearest( $statement->END, $_current_data['IF']->start_position );
$_current_data ['ELSE'] = ( isset($statement->ELSE) && count($statement->ELSE) > 0 ) ? $this->_find_nearest ( $statement->ELSE, $_current_data['IF']->start_position, $_current_data['END']->start_position ) : FALSE;
$_current_data ['ELSEIF'] = ( isset($statement->ELSEIF) && count($statement->ELSEIF) > 0 ) ? $this->_find_between ( $statement->ELSEIF, $_current_data['IF']->start_position, $_current_data['END']->start_position ) : FALSE;
$current = (object) $_current_data;
## Is IF is NOT true, try first ELSEIF if any
if ( ! $this->_statement( $current->IF->param ))
{
## If there are some ELSEIF check them, if not find ELSE. If there is not ELSE too, then return FALSE
$_elseif_match_found = FALSE; // Used as identifier. When ELSEIF with TRUE will be found, this will change to TRUE and ELSE will be skipped. I can't make it another way.
if ( $current->ELSEIF && count( $current->ELSEIF ) > 0 )
{
foreach ( $current->ELSEIF as $n => $current_elseif)
{
if ( $this->_statement( $current_elseif->param) )
{
$result_object = $current_elseif;
## Search for next object, so we can get content inside
if ( $current_elseif == end( $current->ELSEIF ) ) // if last ELSEIF
{
if ( $current->ELSE )
{
$next_object = $current->ELSE;
}
else
{
$next_object = $current->END;
}
}
else
{
$next_object = $current->ELSEIF[ $n+1 ]; // next elseif
}
$_elseif_match_found = TRUE;
}
$this->_destroy($statement->ELSEIF, $current_elseif);
unset($current_elseif);
}
}
## If we didn't found ELSEIF, but there is ELSE do it! If there is no ELSE, than return FALSE
if ( ! $_elseif_match_found )
{
if ( $current->ELSE )
{
$result_object = $current->ELSE;
$next_object = $current->END;
$this->_destroy($statement->ELSE, $current->ELSE);
}
else
{
$result_object = FALSE;
}
}
}
else
{
## When IF is TRUE
$result_object = $current->IF;
if ( $current->ELSEIF && count($current->ELSEIF) > 0)
{
$next_object = $current->ELSEIF[0];
}
elseif ( $current->ELSE)
{
$next_object = $current->ELSE;
}
else
{
$next_object = $current->END;
}
}
## Let's select content and $this->_destroy whole condition
if ( $result_object )
{
$_content = substr( $this->data->input, $result_object->end_position, ( $next_object->start_position - $result_object->end_position ));
}
else
{
$_content = '';
}
$_gap = ( $current->END->end_position - $current->IF->start_position ) - strlen( $_content ); // difference between old and new legth of document
$_from_position = $current->IF->start_position; // needed for updating positions. We want update positions after conditions. (Becoause these before conditions weren't affected by current condition)
## Replaces content of whole condition from <!-- IF --> to <!-- END --> with content of result object
$this->data->input = $this->_replace_content( $current->IF->start_position, $current->END->end_position, $_content, $this->data->input);
## Updates position of all elements
$this->_destroy($statement->IF, $current->IF);
$this->_destroy($statement->END, $current->END);
$this->_destroy($statement->ELSE, $current->ELSE);
$this->_destroy($statement->ELSEIF, $current->ELSEIF);
$this->_update_positions( $statement, $_gap, $_from_position );
unset( $result_object );
unset( $next_object );
unset( $current );
}
return $this->data->input;
}
}
}
/**
* _find_between()
*
* @access private
* @param array
* @param int
* @param int
* @return array
* @usage _conditions()
*
* Searches for elements between start and end position
*
* */
private function _find_between( $array, $start_position, $end_position = FALSE )
{
$return = array();
foreach ( $array as $object )
{
if ( $object->start_position > $start_position )
{
if ( $end_position )
{
if ( $object->end_position >= $end_position )
{
continue;
}
}
$return[] = $object;
}
}
return $return;
}
/**
* _find_nearest()
*
* @access private
* @param array
* @param int
* @param int
* @return array
* @usage _conditions()
*
* Searches for elements between start and end position and returns the first one
*
* */
function _find_nearest( $arr, $sp, $ep = FALSE )
{
return $this->_find_between( $arr, $sp, $ep )[0];
}
/**
* _destroy()
*
* @access private
* @param array
* @param array
* @param mixed
* @return ---
* @usage _conditions()
*
* Unsets used statements in conditions
*
* */
function _destroy( &$haystack, $needle )
{
if ( is_array($needle) )
{
foreach ( $needle as $item )
{
$this->_destroy($haystack, $item);
}
}
else
{
if ( ! empty( $haystack ))
{
foreach ( $haystack as $id => $element )
{
if ( $needle == $element )
{
unset( $haystack[$id] );
break;
}
}
}
}
}
/**
* _replace_content()
*
* @access private
* @param int
* @param int
* @param string
* @param string
* @return array
* @usage _conditions()
*
* Replaces content of whole condition, with part marked as TRUE
*
* */
function _replace_content( $start_position, $end_position, $needle, $haystack )
{
$content_before = substr( $haystack, 0, $start_position);
$content_after = substr( $haystack, $end_position );
return $content_before . $needle . $content_after;
}
/**
* _update_positions()
*
* @access private
* @param object
* @param int
* @param int
* @usage _conditions()
*
* Updates positions of elements after starting position (after condition's start)
*
* */
function _update_positions( &$object, $gap, $start_position )
{
foreach ( array( 'IF', 'ELSEIF', 'ELSE', 'END') as $type )
{
if ( isset($object->$type) && count($object->$type) >0 )
{
foreach ( $object->$type as $id => $obj )
{
if ( $obj->start_position > $start_position )
{
$object->{$type}[$id]->start_position = $obj->start_position - $gap;
$object->{$type}[$id]->end_position = $obj->end_position - $gap;
}
}
}
}
}
/**
* _statement()
*
* @access private
* @param string
* @return bool
* @usage _conditions()
*
* Is statement TRUE?
*
* */
function _statement( $code )
{
## Replace pseudo-variables & appends
$code = $this->smart($code, $this->data->conditions, TRUE);
$code = preg_replace_callback('#{condition:(.*?)}#', create_function( '$matches', '
list(, $value ) = $matches;
if ( is_bool( $value ) || empty( $value ))
{
return ( $value == TRUE && ! empty($value)) ? \'1\' : \'0\';
}
else
{
return "\'" . json_decode(urldecode($value)) . "\'";
}'), $code);
## Is the condition all right? If not, it needs some adjustements
if ( $this->_try_parse( $code )->error )
{
## Replace everything that seems to be true or false to true or false :)
$code = str_replace( array( 'true', 'TRUE', '"TRUE"', '"true"', '\'TRUE\'', '\'true\'' ), '1', $code );
$code = str_replace( array( 'false', 'FALSE', '"FALSE"', '"false"', '\'FALSE\'', '\'false\'' ), '0', $code );
## Is it all right now?
if ( $this->_try_parse($code)->error )
{
## Let's extract all words/chars that seems interesting
preg_match_all('#[a-zA-Z0-9_\'\-\"\.\+\*\/{}:]+#', $code, $words );
if ( count($words) > 0 )
{
## Exceptions are not interesting!
$exceptions = array('and', 'or', '&&', '||', '*', '/', '+', '-', '>', '<', '!');
foreach ( $words[0] as $current => $word )
{
## If it's not a number, not a function, not an exception, it's not starting with quotes than what it is?
if ( ! is_numeric( $word ) AND ! in_array( $word, $exceptions ) AND ! function_exists( $word ) AND ! ( substr($word, 0, 1) == '"' && substr($word, -1) == '"' ) AND ! ( substr($word, 0, 1) == "'" && substr($word, -1) == "'") )
{
## Is it a TRUE/FALSE condition variable from parser?
if ( isset( $this->data->conditions[$word] ))
{
$value = ($this->data->conditions[$word] == TRUE)? '1' : '0' ;
$code = str_replace($word, $value, $code); // I gotcha!!! Haha ...
}
else
{
## We don't know what it is, but it's a word, let's treat with it like a word (create quotes)
## Situation: {mode} == 'edit', will produce edit == 'edit', and replacing will cause "edit" == "'edit'",
## lets protect from such situation
$code = str_replace(sprintf('"%s"', $word), $word, $code);
$code = str_replace(sprintf("'%s'", $word), $word, $code);
$code = str_replace($word, sprintf('"%s"', $word), $code);
}
}
}
## If it's just a text like "test2", it means that variable is not defined, and that's why we return FALSE
if ( substr( trim($code), 0, 1) == '"' && substr( trim($code), -1) == '"' && ( strstr( $code, ' ' ) == FALSE ) )
{
return FALSE;
}
if ( $this->_try_parse($code)->error )
{
## There is something unexpecting. Notice developer and return FALSE.
die( 'Parser don\'t understand your condition. Please fix it or write to helpdesk. Condition after parsing: '. $code );
return FALSE;
}
}
}
}
return $this->_try_parse($code)->result;
}
/**
* _try_parse()
*
* @access private
* @param string
* @return object
* @usage _conditions()
*
* Tryies to parse statement
*
* */
function _try_parse( $code )
{
ob_start(); // Opens buffer
$cond = NULL;
echo $rand = sha1(microtime()); // Creates watchpoint
eval( 'error_reporting(-1); $cond = (bool) (' . $code . '); $x = ( 1 == $cond); $y = $code + 1;'); // Let's try if it's valid
$output = ob_get_clean(); // Deletes error messages
echo substr($output, 0, strpos($output, $rand)); // Outputs everything from buffer from start to watchpoint
$return = new stdClass;
$return->error = (strlen(trim(substr($output, strpos($output, $rand)))) > strlen($rand)) ? TRUE : FALSE; // analyse output - is there any error message?
$return->result = (( $cond === TRUE ) && $return->error == 0) ? TRUE : FALSE;
$this->report[] = array('condition' => $code, 'statement' => print_r($cond, TRUE), 'error' => print_r($return->error, TRUE),'result' => print_r($return->result, TRUE));
return $return;
}
/**
* _variables()
*
* @access private
* @return ---
*
* Provides pseudo-variables replacement
*
*
*
* ,, ,, ,,
* `7MMF' `7MF' db *MM `7MM
* `MA ,V MM MM
* VM: ,V ,6"Yb. `7Mb,od8 `7MM ,6"Yb. MM,dMMb. MM .gP"Ya ,pP"Ybd
* MM. M'8) MM MM' "' MM 8) MM MM `Mb MM ,M' Yb 8I `"
* `MM A' ,pm9MM MM MM ,pm9MM MM M8 MM 8M"""""" `YMMMa.
* :MM; 8M MM MM MM 8M MM MM. ,M9 MM YM. , L. I8
* VF `Moo9^Yo..JMML. .JMML.`Moo9^Yo.P^YbmdP'.JMML.`Mbmmd' M9mmmP' & Appends
*
*
* */
private function _variables()
{
## Replace pseudo-variables
$this->data->input = $this->smart( $this->data->input );
## Treat with exceptions
foreach ($this->config->exceptions as $exception)
{
if (is_string($exception))
$this->data->input = str_replace('{'. $exception .'}', '&{&&;' . $exception . '&}&&;', $this->data->input);
}
if ( ! is_bool($this->config->clean)) $this->config->clean = TRUE;
if ($this->config->clean)
{
## Clean unused variables
$this->data->input = preg_replace('#{[^0-9]{1}[a-zA-Z0-9_\-\.]+(\|([^\(\);]+?))?}#', '', $this->data->input);
## Clean unused appends
$this->data->input = preg_replace('#{([a-zA-Z0-9_\.\-]+(->)*)+\s*(\|([^\(\);]+?))?}#', '', $this->data->input);
## Clean nocode
$this->data->input = preg_replace_callback('#{nocode:(.+?)}#', create_function('$m', 'return base64_decode($m[1]);'), $this->data->input);
## Clean arrays
$this->data->input = preg_replace('#{array:(.+?)(|(.+?))?}#', 'Array', $this->data->input);
}
$this->data->input = str_replace('&{&&;', '{', $this->data->input);
$this->data->input = str_replace('&}&&;', '}', $this->data->input);
}
function smart( $content, $array = array(), $condition = FALSE )
{
$haystack = $this->data->append + $this->input->data + $array;
$haystack['T_Folder'] = $this->config->folder;
preg_match_all('#\{([^\{\}]+?)\}#', $content, $matches);
$matches[0] = array_unique( $matches[0] );
$file_size_start = strlen( $content );
foreach ( $matches[0] as $id => $original )
{
## Prepare
$value = new stdClass;
$value->original = $original;
$value->content = $matches[1][$id];
## Filter
if ( preg_match('#[^\\\\]([=\:\(\)\/\;\+])#', $value->content) )
{
continue;
}
## Arguments
$explode = explode( '|', $value->content );
$value->content = trim($explode[0]);
array_shift($explode);
$value->arguments = $explode;
## Append
$tree = explode( '->', $value->content );
$value->result = $haystack;
try
{
foreach ( $tree as $branch )
{
$branch = trim( $branch );
if ( ! empty( $value->result[$branch] ) && is_object( $value->result[$branch]) )
{
$value->result[$branch] = json_decode(json_encode($value->result[$branch]), TRUE );
}
if ( isset( $value->result[$branch] ))
{
$value->result = $value->result[$branch];
}