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 */
14 /**
15 * Main config file compiler class
16 */
17 class Smarty_Internal_Config_File_Compiler {
18 /**
19 * Initialize compiler
20 */
21 public function __construct($smarty)
22 {
23 $this->smarty = $smarty;
24 // get required plugins
25 $this->smarty->loadPlugin('Smarty_Internal_Configfilelexer');
26 $this->smarty->loadPlugin('Smarty_Internal_Configfileparser');
27 $this->config_data['sections'] = array();
28 $this->config_data['vars'] = array();
29 }
31 /**
32 * Methode to compile a Smarty template
33 *
34 * @param $template template object to compile
35 * @return bool true if compiling succeeded, false if it failed
36 */
37 public function compileSource($config)
38 {
39 /* here is where the compiling takes place. Smarty
40 tags in the templates are replaces with PHP code,
41 then written to compiled files. */
42 $this->config = $config;
43 // get config file source
44 $_content = $config->getConfigSource() . "\n";
45 // on empty template just return
46 if ($_content == '') {
47 return true;
48 }
49 // init the lexer/parser to compile the config file
50 $lex = new Smarty_Internal_Configfilelexer($_content, $this->smarty);
51 $parser = new Smarty_Internal_Configfileparser($lex, $this);
52 if (isset($this->smarty->_parserdebug)) $parser->PrintTrace();
53 // get tokens from lexer and parse them
54 while ($lex->yylex()) {
55 if (isset($this->smarty->_parserdebug)) echo "<br>Parsing {$parser->yyTokenName[$lex->token]} Token {$lex->value} Line {$lex->line} \n";
56 $parser->doParse($lex->token, $lex->value);
57 }
58 // finish parsing process
59 $parser->doParse(0, 0);
60 $config->compiled_config = '<?php $_config_vars = ' . var_export($this->config_data, true) . '; ?>';
61 }
62 /**
63 * display compiler error messages without dying
64 *
65 * If parameter $args is empty it is a parser detected syntax error.
66 * In this case the parser is called to obtain information about exspected tokens.
67 *
68 * If parameter $args contains a string this is used as error message
69 *
70 * @todo output exact position of parse error in source line
71 * @param $args string individual error message or null
72 */
73 public function trigger_config_file_error($args = null)
74 {
75 $this->lex = Smarty_Internal_Configfilelexer::instance();
76 $this->parser = Smarty_Internal_Configfileparser::instance();
77 // get template source line which has error
78 $line = $this->lex->line;
79 if (isset($args)) {
80 // $line--;
81 }
82 $match = preg_split("/\n/", $this->lex->data);
83 $error_text = "Syntax error in config file '{$this->config->getConfigFilepath()}' on line {$line} '{$match[$line-1]}' ";
84 if (isset($args)) {
85 // individual error message
86 $error_text .= $args;
87 } else {
88 // exspected token from parser
89 foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
90 $exp_token = $this->parser->yyTokenName[$token];
91 if (isset($this->lex->smarty_token_names[$exp_token])) {
92 // token type from lexer
93 $expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
94 } else {
95 // otherwise internal token name
96 $expect[] = $this->parser->yyTokenName[$token];
97 }
98 }
99 // output parser error message
100 $error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
101 }
102 throw new SmartyCompilerException($error_text);
103 }
104 }
106 ?>