Integrated twig template-engine

.editorconfig

@@ -16,3 +16,6 @@ trim_trailing_whitespace = true
 [*.json]
 indent_size = 2
 insert_final_newline = ignore
+
+[*.html]
+insert_final_newline = ignore

CHANGELOG.md

@@ -4,8 +4,30 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [1.0.0] - 2017-12-07
- - First release;
+## [1.1.0] - XXXX-XX-XX
+### Added
+ - Renderers to facilitate integrations of template-engines:
+    - Added `Renderer` interface;
+    - Added `TwigRenderer` that integrates `twig/twig`;
+    - Added fallback template loading support.
+ - Template packs to facilitate customization and extensibility of templates:
+    - Added template pack `default` and defined as fallback;
+    - Added template pack `bootstrap4` that integrates custom elements of Bootstrap v4.0.0-beta.2.
+ - Added extra arg `label` on method `getContext` of `Widget` class;
+ - Support to configure renderer and template pack through `Config` singleton class;
+
+### Changed
+ - Class name `PHPFormConfig` to `Config` and moved to `src/` directory;
+ - `BoundField` attribute name `choices` changed to `options`;
+ - `BoundField` attribute `options` now return an array instead of formated string;
+ - `Widgets`, `labelTag` and `ErrorList` now render through default renderer instead of formatter `fleshgrinder/format`;
+ - `CheckboxSelectMultiple` and `RadioSelect` widget wrapped in an unordered list tag instead of previous `div`;
+ - Method name `getSubWidgets` to `getOptions` in `Widgets` class;
+
+### Removed:
+ - Method `asUL` from `ErrorList` class;
+ - `config.php` and `templates.php` files;
+ - Static method `flatatt` from `Attributes` class;
 
 ## [1.0.1] - 2017-12-07
 ### Added
@@ -14,3 +36,6 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
  - Fix formatValue method on ChoiceWidget when value is empty or null;
  - Fix validate on ChoiceField when value if empty and not required.
+
+## [1.0.0] - 2017-12-07
+ - First release;

composer.json

@@ -15,7 +15,8 @@
   },
   "require": {
     "php": ">=7.0.0",
-    "fleshgrinder/format": "^1.1"
+    "fleshgrinder/format": "^1.1",
+    "twig/twig": "^2.4"
   },
   "require-dev": {
     "phpunit/phpunit": "~6.0",
@@ -38,5 +39,9 @@
       "phpcs --standard=phpcs.xml",
       "phpunit -c phpunit.xml"
     ]
+  },
+  "config": {
+    "sort-packages": true,
+    "optimize-autoloader": true
   }
 }

config.php

@@ -4,7 +4,6 @@
 class PHPFormConfig
 {
     const MESSAGES_FILE_PATH = 'src/messages.php';
-    const TEMPLATES_FILE_PATH = 'src/templates.php';
 
     private static $config = null;
 
@@ -14,7 +13,6 @@ class PHPFormConfig
     private function __construct()
     {
         $this->messages = include static::MESSAGES_FILE_PATH;
-        $this->templates = include static::TEMPLATES_FILE_PATH;
     }
 
     public static function getInstance()

src/Config.php

@@ -0,0 +1,75 @@
+<?php
+namespace PHPForm;
+
+use PHPForm\Renderers\TwigRenderer;
+
+class Config extends Singleton
+{
+    /**
+     * @var string Directory with templates
+     */
+    protected $templates_dir = __DIR__ . '/templates/';
+
+    /**
+     * @var string Default fallback template pack
+     */
+    protected $fallback_template_pack = "default";
+
+    /**
+     * @var string Default template pack defined. If null, fallback is used.
+     */
+    protected $template_pack = null;
+
+    /**
+     * @var string Renderer class used to render html content
+     */
+    protected $renderer_class = TwigRenderer::class;
+
+    /**
+     * @var PHPForm\Renderers\Renderer Renderer instance based on $renderer_class.
+     */
+    private $renderer;
+
+    /**
+     * Templates path accordingly with defined template pack.
+     *
+     * @return string
+     */
+    private function buildPath($template_pack)
+    {
+        $path = $this->templates_dir . $template_pack . "/";
+
+        if (!file_exists($path)) {
+            trigger_error("Template pack dir '$path' don't exists.", E_USER_ERROR);
+        }
+
+        return $path;
+    }
+
+    /**
+     * Return renderer class instantiated
+     *
+     * @return PHPForm\Renderers\Renderer
+     */
+    public function getRenderer()
+    {
+        if (is_null($this->renderer)) {
+            $fallback_pack_dir = $this->buildPath($this->fallback_template_pack);
+            $pack_dir = !is_null($this->template_pack) ? $this->buildPath($this->template_pack) : null;
+
+            $this->renderer = new $this->renderer_class($fallback_pack_dir, $pack_dir);
+        }
+
+        return $this->renderer;
+    }
+
+    /**
+     * Define template pack
+     *
+     * @param string
+     */
+    public function setTemplatePack($template_pack)
+    {
+        $this->template_pack = $template_pack;
+    }
+}

src/Errors/ErrorList.php

@@ -3,42 +3,27 @@
 
 use ArrayObject;
 
-use Fleshgrinder\Core\Formatter;
-
-use PHPForm\PHPFormConfig;
+use PHPForm\Config;
 
 class ErrorList extends ArrayObject
 {
+    const TEMPLATE = "error_list.html";
+
     /**
      * Returns the error list rendered as HTML.
      *
      * @return string
      */
     public function __toString()
-    {
-        return $this->asUL();
-    }
-
-    /**
-     * Returns an error dictionary as an unordered list in HTML.
-     *
-     * @return string
-     */
-    public function asUL()
     {
         if (!count($this)) {
             return '';
         }
 
-        $items = [];
-        $list_item_template = PHPFormConfig::getITemplate("ERRORLIST_ITEM");
-
-        foreach ($this as $error) {
-            $items[] = Formatter::format($list_item_template, array("content" => $error));
-        }
-
-        $list_template = PHPFormConfig::getITemplate("ERRORLIST");
+        $renderer = Config::getInstance()->getRenderer();
 
-        return Formatter::format($list_template, array("items" => implode($items)));
+        return $renderer->render(self::TEMPLATE, array(
+            "errors" => $this,
+        ));
     }
 }

src/Fields/BoundField.php

@@ -1,17 +1,16 @@
 <?php
 namespace PHPForm\Fields;
 
-use Fleshgrinder\Core\Formatter;
-
-use PHPForm\PHPFormConfig;
-use PHPForm\Utils\Attributes;
+use PHPForm\Config;
 
 class BoundField
 {
+    const TEMPLATE_LABEL = "label.html";
+
     private $form;
     private $field;
     private $name;
-    private $subwidgets_cache;
+    private $options_cache;
 
     public $html_name;
     public $help_text;
@@ -55,22 +54,21 @@ public function __get($name)
             return $this->getValue();
         }
 
-        if ($name == 'choices') {
-            if (!isset($subwidgets_cache)) {
-                $subwidgets_cache = $this->getSubWidgets();
+        if ($name == 'options') {
+            if (!isset($options_cache)) {
+                $options_cache = $this->getOptions();
             }
-            return $subwidgets_cache;
+            return $options_cache;
         }
 
-        return parent::__get($name);
+        return null;
     }
 
-    private function getSubWidgets(array $attrs = array())
+    private function getOptions(array $attrs = array())
     {
-        $widget = $this->field->getWidget();
         $attrs = $this->buildWidgetAttrs($attrs);
 
-        return $widget->getSubWidgets($this->html_name, $this->getValue(), $attrs);
+        return $this->field->getWidget()->getOptions($this->html_name, $this->getValue(), $attrs);
     }
 
     protected function asWidget($widget = null, array $attrs = array())
@@ -79,31 +77,26 @@ protected function asWidget($widget = null, array $attrs = array())
 
         $attrs = $this->buildWidgetAttrs($attrs);
 
-        return $widget->render($this->html_name, $this->getValue(), $attrs);
+        return $widget->render($this->html_name, $this->getValue(), $this->label, $attrs);
     }
 
-    public function labelTag($contents = null, array $attrs = null)
+    public function labelTag($contents = null, array $attrs = array())
     {
         $contents = is_null($contents) ? $this->label : $contents;
 
         if (empty($contents)) {
             return "";
         }
 
-        if (!is_null($attrs)) {
-            $attrs = Attributes::flatatt($attrs);
-        }
-
         $widget = $this->field->getWidget();
 
-        $label_tpl = PHPFormConfig::getITemplate("LABEL");
-        $label_required_tpl = PHPFormConfig::getITemplate("LABEL_REQUIRED");
+        $renderer = Config::getInstance()->getRenderer();
 
-        return Formatter::format($label_tpl, array(
+        return $renderer->render(self::TEMPLATE_LABEL, array(
             "for" => $widget->buildAutoId($this->html_name),
             "attrs" => $attrs,
             "contents" => $contents,
-            "required" => $this->field->isRequired() ? $label_required_tpl : null
+            "required" => $this->field->isRequired()
         ));
     }
 

src/Fields/MultipleChoiceField.php

@@ -4,8 +4,6 @@
  */
 namespace PHPForm\Fields;
 
-use Fleshgrinder\Core\Formatter;
-
 use PHPForm\Exceptions\ValidationError;
 use PHPForm\PHPFormConfig;
 use PHPForm\Widgets\SelectMultiple;

src/Forms/Form.php

@@ -16,7 +16,7 @@
 
 abstract class Form implements ArrayAccess, Iterator, Countable
 {
-    const PREFIX_TEMPLATE = '{prefix}-{field_name}';
+    const PREFIX_FORMAT = '%s-%s';
     const NON_FIELD_ERRORS = '__all__';
 
     /**
@@ -145,10 +145,7 @@ public function __get(string $name)
     public function addPrefix(string $field_name)
     {
         if (!is_null($this->prefix)) {
-            return Formatter::format(self::PREFIX_TEMPLATE, array(
-                "prefix" => $this->prefix,
-                "field_name" => $field_name
-            ));
+            return sprintf(static::PREFIX_FORMAT, $this->prefix, $field_name);
         }
 
         return $field_name;

src/Renderers/Renderer.php

@@ -0,0 +1,12 @@
+<?php
+/**
+* Abstract class for renderers definition
+*/
+namespace PHPForm\Renderers;
+
+interface Renderer
+{
+    public function __construct(string $fallback_templates_dir, string $templates_dir);
+    public function getTemplate(string $template_name);
+    public function render(string $template_name, array $context);
+}

src/Renderers/TwigRenderer.php

@@ -0,0 +1,38 @@
+<?php
+/**
+*
+*/
+namespace PHPForm\Renderers;
+
+use Twig_Loader_Filesystem;
+use Twig_Environment;
+use Twig_Loader_Chain;
+
+class TwigRenderer implements Renderer
+{
+    private $twig;
+
+    public function __construct(string $fallback_templates_dir, string $templates_dir = null)
+    {
+        $loaders = new Twig_Loader_Chain();
+
+        if (!is_null($templates_dir)) {
+            $loaders->addLoader(new Twig_Loader_Filesystem($templates_dir));
+        }
+
+        $loaders->addLoader(new Twig_Loader_Filesystem($fallback_templates_dir));
+
+        $this->twig = new Twig_Environment($loaders);
+    }
+
+    public function getTemplate(string $template_name)
+    {
+        return $this->twig->load($template_name);
+    }
+
+    public function render(string $template_name, array $context)
+    {
+        $template = $this->getTemplate($template_name);
+        return $template->render($context);
+    }
+}