1 <?php
3 /**
4 * Smarty Internal Plugin Config File Compiler
5 *
6 * This is the config file compiler class. It calls the lexer and parser to
7 * perform the compiling.
8 *
9 * @package Smarty
10 * @subpackage Config
11 * @author Uwe Tews
12 */
13 /**
14 * Main config file compiler class
15 */
16 class Smarty_Internal_Config_File_Compiler {
17 /**
18 * Initialize compiler
19 */
20 public function __construct($smarty)
21 {
22 $this->smarty = $smarty;
23 // get required plugins
24 $this->smarty->loadPlugin('Smarty_Internal_Configfilelexer');
25 $this->smarty->loadPlugin('Smarty_Internal_Configfileparser');
26 $this->config_data['sections'] = array();
27 $this->config_data['vars'] = array();
28 }
30 /**
31 * Methode to compile a Smarty template
32 *
33 * @param $template template object to compile
34 * @return bool true if compiling succeeded, false if it failed
35 */
36 public function compileSource($config)
37 {
38 /* here is where the compiling takes place. Smarty
39 tags in the templates are replaces with PHP code,
40 then written to compiled files. */
41 $this->config = $config;
42 // get config file source
43 $_content = $config->getConfigSource() . "\n";
44 // on empty template just return
45 if ($_content == '') {
46 return true;
47 }
48 // init the lexer/parser to compile the config file
49 $lex = new Smarty_Internal_Configfilelexer($_content, $this->smarty);
50 $parser = new Smarty_Internal_Configfileparser($lex, $this);
51 if (isset($this->smarty->_parserdebug)) $parser->PrintTrace();
52 // get tokens from lexer and parse them
53 while ($lex->yylex()) {
54 if (isset($this->smarty->_parserdebug)) echo "<br>Parsing {$parser->yyTokenName[$lex->token]} Token {$lex->value} Line {$lex->line} \n";
55 $parser->doParse($lex->token, $lex->value);
56 }
57 // finish parsing process
58 $parser->doParse(0, 0);
59 $config->compiled_config = '<?php $_config_vars = ' . var_export($this->config_data, true) . '; ?>';
60 }
61 /**
62 * display compiler error messages without dying
63 *
64 * If parameter $args is empty it is a parser detected syntax error.
65 * In this case the parser is called to obtain information about exspected tokens.
66 *
67 * If parameter $args contains a string this is used as error message
68 *
69 * @todo output exact position of parse error in source line
70 * @param $args string individual error message or null
71 */
72 public function trigger_config_file_error($args = null)
73 {
74 $this->lex = Smarty_Internal_Configfilelexer::instance();
75 $this->parser = Smarty_Internal_Configfileparser::instance();
76 // get template source line which has error
77 $line = $this->lex->line;
78 if (isset($args)) {
79 // $line--;
80 }
81 $match = preg_split("/\n/", $this->lex->data);
82 $error_text = "Syntax error in config file '{$this->config->getConfigFilepath()}' on line {$line} '{$match[$line-1]}' ";
83 if (isset($args)) {
84 // individual error message
85 $error_text .= $args;
86 } else {
87 // exspected token from parser
88 foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
89 $exp_token = $this->parser->yyTokenName[$token];
90 if (isset($this->lex->smarty_token_names[$exp_token])) {
91 // token type from lexer
92 $expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
93 } else {
94 // otherwise internal token name
95 $expect[] = $this->parser->yyTokenName[$token];
96 }
97 }
98 // output parser error message
99 $error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
100 }
101 throw new Exception($error_text);
102 }
103 }
105 ?>