1 files changed, 142 insertions, 0 deletions
diff --git a/inc/Form/Element.php b/inc/Form/Element.php
new file mode 100644
index 000000000..6f23e2631
--- /dev/null
+++ b/inc/Form/Element.php
@@ -0,0 +1,142 @@
+<?php
+namespace dokuwiki\Form;
+
+
+/**
+ * Class Element
+ *
+ * The basic building block of a form
+ *
+ * @package dokuwiki\Form
+ */
+abstract class Element {
+
+    /**
+     * @var array the attributes of this element
+     */
+    protected $attributes = array();
+
+    /**
+     * @var string The type of this element
+     */
+    protected $type;
+
+    /**
+     * @param string $type The type of this element
+     * @param array $attributes
+     */
+    public function __construct($type, $attributes = array()) {
+        $this->type = $type;
+        $this->attributes = $attributes;
+    }
+
+    /**
+     * Gets or sets an attribute
+     *
+     * When no $value is given, the current content of the attribute is returned.
+     * An empty string is returned for unset attributes.
+     *
+     * When a $value is given, the content is set to that value and the Element
+     * itself is returned for easy chaining
+     *
+     * @param string $name Name of the attribute to access
+     * @param null|string $value New value to set
+     * @return string|$this
+     */
+    public function attr($name, $value = null) {
+        // set
+        if($value !== null) {
+            $this->attributes[$name] = $value;
+            return $this;
+        }
+
+        // get
+        if(isset($this->attributes[$name])) {
+            return $this->attributes[$name];
+        } else {
+            return '';
+        }
+    }
+
+    /**
+     * Removes the given attribute if it exists
+     *
+     * @param $name
+     * @return $this
+     */
+    public function rmattr($name) {
+        if(isset($this->attributes[$name])) {
+            unset($this->attributes[$name]);
+        }
+        return $this;
+    }
+
+    /**
+     * Gets or adds a all given attributes at once
+     *
+     * @param array|null $attributes
+     * @return array|$this
+     */
+    public function attrs($attributes = null) {
+        // set
+        if($attributes) {
+            foreach((array) $attributes as $key => $val) {
+                $this->attr($key, $val);
+            }
+            return $this;
+        }
+        // get
+        return $this->attributes;
+    }
+
+    /**
+     * Adds a class to the class attribute
+     *
+     * This is the preferred method of setting the element's class
+     *
+     * @param string $class the new class to add
+     * @return $this
+     */
+    public function addClass($class) {
+        $classes = explode(' ', $this->attr('class'));
+        $classes[] = $class;
+        $classes = array_unique($classes);
+        $this->attr('class', join(' ', $classes));
+        return $this;
+    }
+
+    /**
+     * Get or set the element's ID
+     *
+     * This is the preferred way of setting the element's ID
+     *
+     * @param null|string $id
+     * @return string|$this
+     */
+    public function id($id = null) {
+        if(strpos($id, '__') === false) {
+            throw new \InvalidArgumentException('IDs in DokuWiki have to contain two subsequent underscores');
+        }
+
+        return $this->attr('id', $id);
+    }
+
+    /**
+     * Get or set the element's value
+     *
+     * This is the preferred way of setting the element's value
+     *
+     * @param null|string $value
+     * @return string|$this
+     */
+    public function val($value = null) {
+        return $this->attr('value', $value);
+    }
+
+    /**
+     * The HTML representation of this element
+     *
+     * @return string
+     */
+    abstract public function toHTML();
+}