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@@ -0,0 +1,187 @@
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+<?php namespace Laravel;
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+
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+class Blade {
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+
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+ /**
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+ * All of the compiler functions used by Blade.
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+ *
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+ * @var array
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+ */
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+ protected static $compilers = array(
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+ 'echos',
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+ 'structure_openings',
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+ 'structure_closings',
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+ 'else',
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+ 'yields',
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+ 'section_start',
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+ 'section_end',
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+ );
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+
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+ /**
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+ * Register the Blade view engine with Laravel.
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+ *
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+ * @return void
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+ */
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+ public static function sharpen()
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+ {
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+ Event::listen(View::engine, function($view)
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+ {
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+ // The Blade view engine should only handle the rendering of views which
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+ // end with the Blade extension. If the given view does not, we will
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+ // return false so the View can be rendered as normal.
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+ if ( ! str_contains($view->path, BLADE_EXT))
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+ {
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+ return false;
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+ }
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+
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+ $compiled = path('storage').'views/'.md5($view->path);
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+
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+ // If the view doesn't exist or has been modified since the last time it
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+ // was compiled, we will recompile the view into pure PHP from it's
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+ // Blade representation, writing it to cached storage.
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+ if ( ! file_exists($compiled) or (filemtime($view->path) > filemtime($compiled)))
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+ {
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+ file_put_contents($compiled, Blade::compile($view->path));
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+ }
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+
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+ $view->path = $compiled;
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+
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+ // Once the view has been compiled, we can simply set the path to the
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+ // compiled view on the view instance and call the typical "get"
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+ // method on the view to evaluate the compiled PHP view.
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+ return $view->get();
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+ });
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+ }
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+
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+ /**
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+ * Compiles the specified file containing Blade pseudo-code into valid PHP.
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+ *
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+ * @param string $path
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+ * @return string
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+ */
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+ public static function compile($path)
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+ {
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+ return static::compile_string(file_get_contents($path));
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+ }
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+
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+ /**
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+ * Compiles the given string containing Blade pseudo-code into valid PHP.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ public static function compile_string($value)
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+ {
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+ foreach (static::$compilers as $compiler)
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+ {
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+ $method = "compile_{$compiler}";
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+
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+ $value = static::$method($value);
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+ }
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+
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+ return $value;
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+ }
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+
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+ /**
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+ * Rewrites Blade echo statements into PHP echo statements.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_echos($value)
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+ {
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+ return preg_replace('/\{\{(.+?)\}\}/', '<?php echo $1; ?>', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade structure openings into PHP structure openings.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_structure_openings($value)
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+ {
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+ $pattern = '/(\s*)@(if|elseif|foreach|for|while)(\s*\(.*\))/';
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+
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+ return preg_replace($pattern, '$1<?php $2$3: ?>', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade structure closings into PHP structure closings.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_structure_closings($value)
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+ {
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+ $pattern = '/(\s*)@(endif|endforeach|endfor|endwhile)(\s*)/';
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+
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+ return preg_replace($pattern, '$1<?php $2; ?>$3', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade else statements into PHP else statements.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_else($value)
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+ {
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+ return preg_replace('/(\s*)@(else)(\s*)/', '$1<?php $2: ?>$3', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade @yield statements into Section statements.
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+ *
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+ * The Blade @yield statement is a shortcut to the Section::yield method.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_yields($value)
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+ {
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+ $pattern = static::matcher('yield');
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+
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+ return preg_replace($pattern, '$1<?php echo \\Laravel\\Section::yield$2; ?>', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade @section statements into Section statements.
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+ *
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+ * The Blade @section statement is a shortcut to the Section::start method.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_section_start($value)
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+ {
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+ $pattern = static::matcher('section');
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+
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+ return preg_replace($pattern, '$1<?php \\Laravel\\Section::start$2; ?>', $value);
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+ }
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+
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+ /**
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+ * Rewrites Blade @endsection statements into Section statements.
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+ *
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+ * The Blade @endsection statement is a shortcut to the Section::stop method.
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+ *
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+ * @param string $value
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+ * @return string
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+ */
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+ protected static function compile_section_end($value)
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+ {
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+ return preg_replace('/@endsection/', '<?php \\Laravel\\Section::stop(); ?>', $value);
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+ }
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+
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+ /**
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+ * Get the regular expression for a generic Blade function.
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+ *
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+ * @param string $function
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+ * @return string
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+ */
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+ protected static function matcher($function)
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+ {
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+ return '/(\s*)@'.$function.'(\s*\(.*\))/';
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+ }
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+
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+}
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