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<?php namespace Kris\LaravelFormBuilder; |
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use Illuminate\Support\Collection; |
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use Symfony\Component\Translation\TranslatorInterface; |
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use Illuminate\Database\Eloquent\Model; |
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use Kris\LaravelFormBuilder\Fields\FormField; |
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use Illuminate\Contracts\View\Factory as View; |
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class FormHelper |
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{ |
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/** |
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* @var View |
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*/ |
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protected $view; |
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/** |
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* @var TranslatorInterface |
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*/ |
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protected $translator; |
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/** |
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* @var array |
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*/ |
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protected $config; |
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/** |
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* @var FormBuilder |
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*/ |
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protected $formBuilder; |
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/** |
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* @var array |
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*/ |
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protected static $reservedFieldNames = [ |
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'save' |
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]; |
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/** |
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* All available field types |
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* |
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* @var array |
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*/ |
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protected static $availableFieldTypes = [ |
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'text' => 'InputType', |
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'email' => 'InputType', |
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'url' => 'InputType', |
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'tel' => 'InputType', |
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'search' => 'InputType', |
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'password' => 'InputType', |
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'hidden' => 'InputType', |
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'number' => 'InputType', |
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'date' => 'InputType', |
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'file' => 'InputType', |
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'image' => 'InputType', |
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'color' => 'InputType', |
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'datetime-local' => 'InputType', |
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'month' => 'InputType', |
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'range' => 'InputType', |
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'time' => 'InputType', |
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'week' => 'InputType', |
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'select' => 'SelectType', |
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'textarea' => 'TextareaType', |
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'button' => 'ButtonType', |
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'submit' => 'ButtonType', |
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'reset' => 'ButtonType', |
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'radio' => 'CheckableType', |
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'checkbox' => 'CheckableType', |
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'choice' => 'ChoiceType', |
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'form' => 'ChildFormType', |
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'entity' => 'EntityType', |
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'collection' => 'CollectionType', |
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'repeated' => 'RepeatedType', |
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'static' => 'StaticType' |
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]; |
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/** |
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* Custom types |
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* |
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* @var array |
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*/ |
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private $customTypes = []; |
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/** |
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* @param View $view |
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* @param TranslatorInterface $translator |
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* @param array $config |
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*/ |
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public function __construct(View $view, TranslatorInterface $translator, array $config = []) |
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{ |
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$this->view = $view; |
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$this->translator = $translator; |
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$this->config = $config; |
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$this->loadCustomTypes(); |
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} |
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/** |
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* @param string $key |
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* @param string $default |
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* @return mixed |
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*/ |
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public function getConfig($key, $default = null) |
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{ |
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return array_get($this->config, $key, $default); |
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} |
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/** |
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* @return View |
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*/ |
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public function getView() |
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{ |
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return $this->view; |
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} |
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/** |
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* Merge options array |
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* |
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* @param array $first |
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* @param array $second |
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* @return array |
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*/ |
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public function mergeOptions(array $first, array $second) |
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{ |
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return array_replace_recursive($first, $second); |
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} |
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/** |
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* Get proper class for field type |
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* |
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* @param $type |
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* @return string |
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*/ |
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public function getFieldType($type) |
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{ |
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$types = array_keys(static::$availableFieldTypes); |
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if (!$type || trim($type) == '') { |
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throw new \InvalidArgumentException('Field type must be provided.'); |
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} |
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if (array_key_exists($type, $this->customTypes)) { |
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return $this->customTypes[$type]; |
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} |
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if (!in_array($type, $types)) { |
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throw new \InvalidArgumentException( |
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sprintf( |
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'Unsupported field type [%s]. Available types are: %s', |
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$type, |
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join(', ', array_merge($types, array_keys($this->customTypes))) |
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) |
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); |
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} |
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$namespace = __NAMESPACE__.'\\Fields\\'; |
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return $namespace . static::$availableFieldTypes[$type]; |
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} |
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/** |
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* Convert array of attributes to html attributes |
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* |
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* @param $options |
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* @return string |
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*/ |
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public function prepareAttributes($options) |
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{ |
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if (!$options) { |
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return null; |
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} |
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$attributes = []; |
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foreach ($options as $name => $option) { |
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if ($option !== null) { |
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$name = is_numeric($name) ? $option : $name; |
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$attributes[] = $name.'="'.$option.'" '; |
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} |
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} |
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return join('', $attributes); |
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} |
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/** |
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* Add custom field |
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* |
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* @param $name |
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* @param $class |
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*/ |
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public function addCustomField($name, $class) |
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{ |
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if (!array_key_exists($name, $this->customTypes)) { |
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return $this->customTypes[$name] = $class; |
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} |
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throw new \InvalidArgumentException('Custom field ['.$name.'] already exists on this form object.'); |
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} |
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/** |
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* Load custom field types from config file |
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*/ |
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private function loadCustomTypes() |
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{ |
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$customFields = (array) $this->getConfig('custom_fields'); |
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if (!empty($customFields)) { |
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foreach ($customFields as $fieldName => $fieldClass) { |
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$this->addCustomField($fieldName, $fieldClass); |
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} |
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} |
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} |
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public function convertModelToArray($model) |
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{ |
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if (!$model) { |
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return null; |
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} |
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if ($model instanceof Model) { |
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return $model->toArray(); |
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} |
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if ($model instanceof Collection) { |
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return $model->all(); |
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} |
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return $model; |
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} |
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/** |
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* Format the label to the proper format |
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* |
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* @param $name |
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* @return string |
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*/ |
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public function formatLabel($name) |
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{ |
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if (!$name) { |
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return null; |
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} |
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if ($this->translator->has($name)) { |
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$translatedName = $this->translator->get($name); |
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if (is_string($translatedName)) { |
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return $translatedName; |
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} |
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} |
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return ucfirst(str_replace('_', ' ', $name)); |
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} |
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/** |
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* @param FormField[] $fields |
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* @return array |
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*/ |
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public function mergeFieldsRules($fields) |
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{ |
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$rules = []; |
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$attributes = []; |
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$messages = []; |
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foreach ($fields as $field) { |
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if ($fieldRules = $field->getValidationRules()) { |
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$rules = array_merge($rules, $fieldRules['rules']); |
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$attributes = array_merge($attributes, $fieldRules['attributes']); |
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$messages = array_merge($messages, $fieldRules['error_messages']); |
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} |
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} |
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return [ |
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'rules' => $rules, |
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'attributes' => $attributes, |
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'error_messages' => $messages |
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]; |
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} |
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/** |
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* @return array |
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*/ |
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public function mergeAttributes($fields) |
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{ |
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$attributes = []; |
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foreach ($fields as $field) { |
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$attributes = array_merge($attributes, $field->getAllAttributes()); |
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} |
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return $attributes; |
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} |
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/** |
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* @param string $string |
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* @return string |
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*/ |
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public function transformToDotSyntax($string) |
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{ |
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return str_replace(['.', '[]', '[', ']'], ['_', '', '.', ''], $string); |
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} |
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/** |
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* @param string $string |
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* @return string |
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*/ |
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public function transformToBracketSyntax($string) |
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{ |
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$name = explode('.', $string); |
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if (count($name) == 1) { |
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return $name[0]; |
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} |
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$first = array_shift($name); |
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return $first . '[' . implode('][', $name) . ']'; |
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} |
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/** |
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* @return TranslatorInterface |
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*/ |
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public function getTranslator() |
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{ |
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return $this->translator; |
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} |
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/** |
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* Check if field name is valid and not reserved |
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* |
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* @throws \InvalidArgumentException |
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* @param string $name |
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* @param string $className |
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*/ |
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public function checkFieldName($name, $className) |
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{ |
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if (!$name || trim($name) == '') { |
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throw new \InvalidArgumentException( |
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"Please provide valid field name for class [{$className}]" |
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); |
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} |
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if (in_array($name, static::$reservedFieldNames)) { |
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throw new \InvalidArgumentException( |
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"Field name [{$name}] in form [{$className}] is a reserved word. Please use a different field name." . |
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"\nList of all reserved words: " . join(', ', static::$reservedFieldNames) |
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); |
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} |
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return true; |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: