Added virtual Element - TODO: clean all this up

composer.json

@@ -5,7 +5,7 @@
     },
 
     "require": {
-        "symfony/Validator" : "*"
+        "symfony/Validator" : "2.2.*"
     },
 
     "require-dev": {
@@ -14,3 +14,4 @@
 
     "minimum-stability": "dev"
 }
+

src/Element/Element.php

@@ -9,7 +9,7 @@
 namespace PPI\Form\Element;
 
 use Symfony\Component\Validator\Constraint;
-use Symfony\Component\Validator\Validator\ValidatorInterface;
+use Symfony\Component\Validator\ValidatorInterface;
 
 abstract class Element implements ElementInterface
 {
@@ -175,12 +175,13 @@ public function getConstraints()
      * @todo garyttierney - do we want the Form to handle validation for every input or should that be left to an element?
      *       if the latter, we should share a single Validator object between all of them.
      *
+     * @param $input string|array
      * @return ElementValidationResult
      */
-    public function validate(ValidatorInterface $validator)
+    public function validate($input, ValidatorInterface $validator)
     {
         // @todo - note, this will be removed in Symfony 3.0 and there's currently no way around that
-        $validatorResult = $validator->validateValue($this->getValue(), $this->getConstraints());
+        $validatorResult = $validator->validateValue($input, $this->getConstraints());
         if(count($validatorResult) === 0) {
             return new ElementValidationResult(true);
         } else {
@@ -192,10 +193,12 @@ public function validate(ValidatorInterface $validator)
         }
     }
 
-    /**
+    /*
+     *
      * Set element options
      *
      * @param array $options
+     *
      */
     public function setOptions($options)
     {

src/Element/Virtual.php

@@ -0,0 +1,54 @@
+<?php
+
+
+namespace PPI\Form\Element;
+
+/**
+ * An abstract Element which encapsulates the rendering of several inputs and transforms the independent data into something
+ * suitable for validation.
+ *
+ * Class Virtual
+ * @package PPI\Form\Element
+ */
+abstract class Virtual extends Element
+{
+    protected $elements = array();
+
+    public function addElement(Element $element)
+    {
+        $this->elements[] = $element;
+    }
+
+    public function __construct($options = array())
+    {
+        parent::__construct($options);
+    }
+
+    /**
+     * Render the tag
+     *
+     * @return string
+     */
+    public function render()
+    {
+        $parts = array();
+
+        foreach($this->elements as $element) {
+            $parts[] = $element->render();
+        }
+
+        return implode("\n", $parts);
+    }
+
+    /**
+     * Takes an array of input and returns a string. Should be used when you have 2 elements which should be concatenated into 1 variable.
+     *
+     * For example, if you want a TimeElement which allows the user to choose hours via a select element, and minutes via a select element
+     * then you should get the input as an array (input_x[0] -- hours, input_x[1] -- minutes) and implement this method
+     * to join both of those inputs.
+     *
+     * @param array $data
+     * @return string
+     */
+    public abstract function transformInput(array $data);
+}

src/Form.php

@@ -10,6 +10,8 @@
 
 use PPI\Form\Element\Element;
 use PPI\Form\Element\ElementInterface;
+use PPI\Form\Element\Label;
+use PPI\Form\Element\Virtual;
 use Symfony\Component\Validator\Validation;
 
 class Form
@@ -132,7 +134,7 @@ public function submit($name, $value = 'Submit', array $options = array())
      */
     public function hidden($name, array $options = array())
     {
-        return $this->add($name, 'hidden', $options);
+        return $this->add('hidden', 'hidden', $options);
     }
 
     /**
@@ -342,28 +344,87 @@ public function end()
         return '</form>';
     }
 
+
     /**
      * Validates all input elements within a form with their constraints. Returns a hashtable of element names mapped
      * to an array of their error messages as described in {@link ElementValidationResult::getErrorMessages}
      *
-     * @return array
+     * @param array $input The clients POST data
+     *
+     * @return array An array of error messages keyed by element name
      */
-    public function validate()
+    public function validate(array $input)
     {
         $validator = Validation::createValidator();
         $errors = array();
 
         /**
          * @var $element Element
          */
-        foreach($this->elements as $elementName => $element) {
-            $validationResult = $element->validate($validator);
-            if($validationResult->isSuccessful()) {
+        foreach($this->elements as $key => $element) {
+            if($element instanceof Label) {
                 continue;
             }
 
-            $errors[$elementName] = $validationResult->getErrorMessages();
+            if(substr($key, -2) == "[]") {
+                $elementName = substr($key, 0, -2);
+            } else {
+                $elementName = $key;
+            }
+
+            if(count($element->getConstraints()) > 0) {
+                $value = array_key_exists($elementName, $input) ? $input[$elementName] : null; // map elements with no value to null
+                if(is_array($value) && $element instanceof Virtual) {
+                    $value = $element->transformData($value);
+                }
+
+                $validationResult = $element->validate($value, $validator);
+
+                if ($validationResult->isSuccessful()) {
+                    continue;
+                }
+
+                $errors[$elementName] = $validationResult->getErrorMessages();
+            }
         }
-        return $errors;
+
+        $this->errorMessages = $errors;
+
+        return count($errors) == 0;
+    }
+
+    protected $errorMessages = array();
+
+    public function getErrorsForElement(Element $element)
+    {
+        return $this->errorMessages[$element->getName()];
+    }
+
+    public function hasErrorsForElement(Element $element)
+    {
+        return array_key_exists($element->getName(), $this->errorMessages);
+    }
+
+    /**
+     * Takes an $input an array and checks if the input key corresponds to a Virtual element, if it does then it calls
+     * the {@see Virtual::transformInput} function to make the input value good for validation.
+     *
+     * @param array $input An array of $_POSTed variables.
+     */
+    public function transformInput(array $input)
+    {
+        $output = array();
+
+        foreach($input as $key => $val) {
+            if(array_key_exists($key, $this->elements) && $this->elements[$key] instanceof Virtual) {
+                if (is_array($input)) {
+                    $output[$key] = $this->elements[$key]->transformInput($val);
+                }
+            } else {
+                $output[$key] = $val;
+            }
+        }
+
+        return $output;
     }
 }