Add method isTemplateString

This simple method allows template loaders to validate if a given value is maybe the contents of a template or just a template identifier (file path).

src/Charcoal/View/AbstractLoader.php

@@ -86,6 +86,14 @@ public function load($ident)
             }
         }
 
+        /**
+         * Prevents the loader from passing a proper template through further
+         * procedures meant for a template identifier.
+         */
+        if ($this->isTemplateString($ident)) {
+            return $ident;
+        }
+
         $file = $this->findTemplateFile($ident);
         if ($file === null || $file === '') {
             return $ident;
@@ -267,6 +275,21 @@ private function resolvePath($path)
         return $path;
     }
 
+    /**
+     * Determine if the variable is a template literal.
+     *
+     * This method looks for any line-breaks in the given string,
+     * which a file path would not allow.
+     *
+     * @param  string $ident The template being evaluated.
+     * @return boolean Returns TRUE if the given value is most likely the template contents
+     *     as opposed to a template identifier (file path).
+     */
+    protected function isTemplateString($ident)
+    {
+        return strpos($ident, PHP_EOL) !== false;
+    }
+
     /**
      * Get the template file (full path + filename) to load from an ident.
      *

src/Charcoal/View/Mustache/MustacheLoader.php

@@ -18,6 +18,21 @@ class MustacheLoader extends AbstractLoader implements
     LoaderInterface,
     MustacheLoaderInterface
 {
+    /**
+     * Determine if the variable is a template literal.
+     *
+     * This method looks for any tag delimiters in the given string,
+     * which a file path would most likely not have.
+     *
+     * @todo   Add support for custom delimiters.
+     * @param  string $ident The template being evaluated.
+     * @return boolean
+     */
+    protected function isTemplateString($ident)
+    {
+        return strpos($ident, '{{') !== false || parent::isTemplateString($ident);
+    }
+
     /**
      * Convert an identifier to a file path.
      *

src/Charcoal/View/Php/PhpLoader.php

@@ -13,6 +13,21 @@
  */
 class PhpLoader extends AbstractLoader implements LoaderInterface
 {
+    /**
+     * Determine if the variable is a template literal.
+     *
+     * This method looks for any PHP tags in the given string,
+     * which a file path would most likely not have.
+     *
+     * @todo   Add support for custom delimiters.
+     * @param  string $ident The template being evaluated.
+     * @return boolean
+     */
+    protected function isTemplateString($ident)
+    {
+        return strpos($ident, '<?') !== false || parent::isTemplateString($ident);
+    }
+
     /**
      * Convert an identifier to a file path.
      *

src/Charcoal/View/Twig/TwigLoader.php

@@ -23,6 +23,21 @@ class TwigLoader extends AbstractLoader implements
     TwigExistsLoaderInterface,
     TwigSourceContextLoaderInterface
 {
+    /**
+     * Determine if the variable is a template literal.
+     *
+     * This method looks for any tag delimiters in the given string,
+     * which a file path would most likely not have.
+     *
+     * @todo   Add support for custom delimiters.
+     * @param  string $ident The template being evaluated.
+     * @return boolean
+     */
+    protected function isTemplateString($ident)
+    {
+        return strpos($ident, '{%') !== false || parent::isTemplateString($ident);
+    }
+
     /**
      * Convert an identifier to a file path.
      *