<?php
/**
* Smarty Internal Plugin Config File Compiler
*
* This is the config file compiler class. It calls the lexer and parser to
* perform the compiling.
*
* @package Smarty
* @subpackage Config
* @author Uwe Tews
*/
/**
* Main config file compiler class
*
* @package Smarty
* @subpackage Config
*/
class Smarty_Internal_Config_File_Compiler
{
/**
* Lexer object
*
* @var object
*/
public $lex;
/**
* Parser object
*
* @var object
*/
public $parser;
/**
* Smarty object
*
* @var Smarty object
*/
public $smarty;
/**
* Smarty object
*
* @var Smarty_Internal_Config object
*/
public $config;
/**
* Compiled config data sections and variables
*
* @var array
*/
public $config_data = array();
/**
* Initialize compiler
*
* @param Smarty $smarty base instance
*/
public function __construct($smarty)
{
$this->smarty = $smarty;
$this->config_data['sections'] = array();
$this->config_data['vars'] = array();
}
/**
* Method to compile a Smarty template.
*
* @param Smarty_Internal_Config $config config object
* @return bool true if compiling succeeded, false if it failed
*/
public function compileSource(Smarty_Internal_Config $config)
{
/* here is where the compiling takes place. Smarty
tags in the templates are replaces with PHP code,
then written to compiled files. */
$this->config = $config;
// get config file source
$_content = $config->source->content . "\n";
// on empty template just return
if ($_content == '') {
return true;
}
// init the lexer/parser to compile the config file
$lex = new Smarty_Internal_Configfilelexer($_content, $this->smarty);
$parser = new Smarty_Internal_Configfileparser($lex, $this);
if ($this->smarty->_parserdebug) $parser->PrintTrace();
// get tokens from lexer and parse them
while ($lex->yylex()) {
if ($this->smarty->_parserdebug) echo "<br>Parsing {$parser->yyTokenName[$lex->token]} Token {$lex->value} Line {$lex->line} \n";
$parser->doParse($lex->token, $lex->value);
}
// finish parsing process
$parser->doParse(0, 0);
$config->compiled_config = '<?php $_config_vars = ' . var_export($this->config_data, true) . '; ?>';
}
/**
* display compiler error messages without dying
*
* If parameter $args is empty it is a parser detected syntax error.
* In this case the parser is called to obtain information about exspected tokens.
*
* If parameter $args contains a string this is used as error message
*
* @param string $args individual error message or null
*/
public function trigger_config_file_error($args = null)
{
$this->lex = Smarty_Internal_Configfilelexer::instance();
$this->parser = Smarty_Internal_Configfileparser::instance();
// get template source line which has error
$line = $this->lex->line;
if (isset($args)) {
// $line--;
}
$match = preg_split("/\n/", $this->lex->data);
$error_text = "Syntax error in config file '{$this->config->source->filepath}' on line {$line} '{$match[$line-1]}' ";
if (isset($args)) {
// individual error message
$error_text .= $args;
} else {
// exspected token from parser
foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
$exp_token = $this->parser->yyTokenName[$token];
if (isset($this->lex->smarty_token_names[$exp_token])) {
// token type from lexer
$expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
} else {
// otherwise internal token name
$expect[] = $this->parser->yyTokenName[$token];
}
}
// output parser error message
$error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
}
throw new SmartyCompilerException($error_text);
}
}
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