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Improved evaluate() Twig function to use environment/context

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This commit is contained in:
Andy Miller
2017-03-13 13:39:17 -06:00
parent c86d791d44
commit 3cf8bd5928
2 changed files with 44 additions and 13 deletions
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1
CHANGELOG.md
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@@ -7,6 +7,7 @@
* Added optional parameter to `|markdown(false)` filter to toggle block/line processing (default|true = `block`)
* Added new `Page::folderExists()` method
1. [](#improved)
* `Twig::evaluate()` now takes current environment and context into account
* Genericized `direct-install` so it can be called via Admin plugin
1. [](#bugfix)
* Fixed a minor bug in Number validation [#1329](https://github.com/getgrav/grav/issues/1329)

56
system/src/Grav/Common/Twig/TwigExtension.php
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@@ -104,7 +104,8 @@ class TwigExtension extends \Twig_Extension
new \Twig_simpleFunction('authorize', [$this, 'authorize']),
new \Twig_SimpleFunction('debug', [$this, 'dump'], ['needs_context' => true, 'needs_environment' => true]),
new \Twig_SimpleFunction('dump', [$this, 'dump'], ['needs_context' => true, 'needs_environment' => true]),
new \Twig_SimpleFunction('evaluate', [$this, 'evaluateFunc']),
new \Twig_SimpleFunction('evaluate', [$this, 'evaluateStringFunc'], ['needs_context' => true, 'needs_environment' => true]),
new \Twig_SimpleFunction('evaluate_twig', [$this, 'evaluateTwigFunc'], ['needs_context' => true, 'needs_environment' => true]),
new \Twig_SimpleFunction('gist', [$this, 'gistFunc']),
new \Twig_SimpleFunction('nonce_field', [$this, 'nonceFieldFunc']),
new \Twig_simpleFunction('random_string', [$this, 'randomStringFunc']),
@@ -587,22 +588,51 @@ class TwigExtension extends \Twig_Extension
}
/**
* Evaluate a string
* This function will evaluate Twig $twig through the $environment, and return its results.
*
* @example {{ evaluate('grav.language.getLanguage') }}
*
* @param string $input String to be evaluated
*
* @return string Returns the evaluated string
* @param \Twig_Environment $environment
* @param array $context
* @param string $twig
* @return mixed
*/
public function evaluateFunc($input)
{
if (!$input) { //prevent an obscure Twig error if $input is not set
$input = '""';
}
return $this->grav['twig']->processString("{{ $input }}");
public function evaluateTwigFunc( \Twig_Environment $environment, $context, $twig ) {
$loader = $environment->getLoader( );
$parsed = $this->parseString( $environment, $context, $twig );
$environment->setLoader( $loader );
return $parsed;
}
/**
* This function will evaluate a $string through the $environment, and return its results.
*
* @param \Twig_Environment $environment
* @param $context
* @param $string
* @return mixed
*/
public function evaluateStringFunc(\Twig_Environment $environment, $context, $string )
{
$parsed = $this->evaluateTwigFunc($environment, $context, "{{ $string }}");
return $parsed;
}
/**
* Sets the parser for the environment to Twig_Loader_String, and parsed the string $string.
*
* @param \Twig_Environment $environment
* @param array $context
* @param string $string
* @return string
*/
protected function parseString( \Twig_Environment $environment, $context, $string ) {
$environment->setLoader( new \Twig_Loader_String( ) );
return $environment->render( $string, $context );
}
/**
* Based on Twig_Extension_Debug / twig_var_dump
* (c) 2011 Fabien Potencier