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Initial work adding pragma detection to Mustache.php

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Currently stores pragmas and options, but does nothing with them. Also throws exceptions when it encounters unknown pragmas.
Test coverage only for exceptions and pragma tag removal.
This commit is contained in:
Justin Hileman
2010-04-28 21:51:54 -04:00
parent bee280f127
commit 537ebc44c8
2 changed files with 104 additions and 2 deletions
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Mustache.php
+64 -2
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@@ -30,6 +30,9 @@ class Mustache {
protected $template = '';
protected $context = array();
protected $partials = array();
protected $pragmas = array();
protected $pragmasImplemented = array('DOT-NOTATION');
/**
* Mustache class constructor.
@@ -101,6 +104,7 @@ class Mustache {
* @return string Rendered Mustache template.
*/
protected function _render($template, &$context) {
$template = $this->renderPragmas($template, $context);
$template = $this->renderSection($template, $context);
return $this->renderTags($template, $context);
}
@@ -162,6 +166,60 @@ class Mustache {
return $template;
}
/**
* Initialize pragmas and remove all pragma tags.
*
* @access protected
* @param string $template
* @param array &$context
* @return string
*/
protected function renderPragmas($template, &$context) {
// no pragmas
if (strpos($template, $this->otag . '%') === false) {
return $template;
}
$otag = $this->prepareRegEx($this->otag);
$ctag = $this->prepareRegEx($this->ctag);
$regex = '/' . $otag . '%([\\w_-]+)((?: [\\w]+=[\\w]+)*)' . $ctag . '\\n?/';
return preg_replace_callback($regex, array($this, 'renderPragma'), $template);
}
/**
* A preg_replace helper to remove {{%PRAGMA}} tags and enable requested pragma.
*
* @access protected
* @param mixed $matches
* @return void
* @throws MustacheException unknown pragma
*/
protected function renderPragma($matches) {
$pragma = $matches[0];
$pragma_name = $matches[1];
$options_string = $matches[2];
if (!in_array($pragma_name, $this->pragmasImplemented)) {
throw new MustacheException('Unknown pragma: ' . $pragma_name, MustacheException::UNKNOWN_PRAGMA);
}
$options = array();
foreach (explode(' ', trim($options_string)) as $o) {
if ($p = trim($o)) {
$p = explode('=', trim($p));
$options[$p[0]] = $p[1];
}
}
if (empty($options)) {
$this->pragmas[$pragma_name] = true;
} else {
$this->pragmas[$pragma_name] = $options;
}
return '';
}
/**
* Loop through and render individual Mustache tags.
*
@@ -175,8 +233,8 @@ class Mustache {
return $template;
}
$otag = $this->prepareRegEx($this->otag);
$ctag = $this->prepareRegEx($this->ctag);
$otag = $this->prepareRegEx($this->otag);
$ctag = $this->prepareRegEx($this->ctag);
$this->tagRegEx = '/' . $otag . "(#|\/|=|!|>|\\{|&)?([^\/#]+?)\\1?" . $ctag . "+/";
$html = '';
$matches = array();
@@ -442,4 +500,8 @@ class MustacheException extends Exception {
// with no associated partial.
const UNKNOWN_PARTIAL = 3;
// An UNKNOWN_PRAGMA exception is thrown whenever a {{%PRAGMA}} tag appears
// which can't be handled by this Mustache instance.
const UNKNOWN_PRAGMA = 4;
}