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<?php
/**
* @package FrameworkOnFramework
* @subpackage form
* @copyright Copyright (C) 2010 - 2012 Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('_JEXEC') or die;
/**
* An interface for FOFFormHeader fields, used to define the filters and the
* elements of the header row in repeatable (browse) views
*
* @package FrameworkOnFramework
* @since 2.0
*/
abstract class FOFFormHeader
{
/**
* The description text for the form field. Usually used in tooltips.
*
* @var string
* @since 2.0
*/
protected $description;
/**
* The SimpleXMLElement object of the <field /> XML element that describes the header field.
*
* @var SimpleXMLElement
* @since 2.0
*/
protected $element;
/**
* The FOFForm object of the form attached to the header field.
*
* @var FOFForm
* @since 2.0
*/
protected $form;
/**
* The label for the header field.
*
* @var string
* @since 2.0
*/
protected $label;
/**
* The header HTML.
*
* @var string|null
* @since 2.0
*/
protected $header;
/**
* The filter HTML.
*
* @var string|null
* @since 2.0
*/
protected $filter;
/**
* The buttons HTML.
*
* @var string|null
* @since 2.0
*/
protected $buttons;
/**
* The options for a drop-down filter.
*
* @var array|null
* @since 2.0
*/
protected $options;
/**
* The name of the form field.
*
* @var string
* @since 2.0
*/
protected $name;
/**
* The name of the field.
*
* @var string
* @since 2.0
*/
protected $fieldname;
/**
* The group of the field.
*
* @var string
* @since 2.0
*/
protected $group;
/**
* The form field type.
*
* @var string
* @since 2.0
*/
protected $type;
/**
* The value of the filter.
*
* @var mixed
* @since 2.0
*/
protected $value;
/**
* The intended table data width (in pixels or percent).
*
* @var mixed
* @since 2.0
*/
protected $tdwidth;
/**
* The key of the filter value in the model state.
*
* @var mixed
* @since 2.0
*/
protected $filterSource;
/**
* Is this a sortable column?
*
* @var bool
* @since 2.0
*/
protected $sortable = false;
/**
* Method to instantiate the form field object.
*
* @param FOFForm $form The form to attach to the form field object.
*
* @since 2.0
*/
public function __construct(FOFForm $form = null)
{
// If there is a form passed into the constructor set the form and form control properties.
if ($form instanceof FOFForm)
{
$this->form = $form;
}
}
/**
* Method to get certain otherwise inaccessible properties from the form field object.
*
* @param string $name The property name for which to the the value.
*
* @return mixed The property value or null.
*
* @since 2.0
*/
public function __get($name)
{
switch ($name)
{
case 'description':
case 'name':
case 'type':
case 'fieldname':
case 'group':
case 'tdwidth':
return $this->$name;
break;
case 'label':
if (empty($this->label))
{
$this->label = $this->getLabel();
}
return $this->label;
case 'value':
if (empty($this->value))
{
$this->value = $this->getValue();
}
return $this->value;
break;
case 'header':
if (empty($this->header))
{
$this->header = $this->getHeader();
}
return $this->header;
break;
case 'filter':
if (empty($this->filter))
{
$this->filter = $this->getFilter();
}
return $this->filter;
break;
case 'buttons':
if (empty($this->buttons))
{
$this->buttons = $this->getButtons();
}
return $this->buttons;
break;
case 'options':
if (empty($this->options))
{
$this->options = $this->getOptions();
}
return $this->options;
break;
case 'sortable':
if (empty($this->sortable))
{
$this->sortable = $this->getSortable();
}
return $this->sortable;
break;
}
return null;
}
/**
* Method to attach a JForm object to the field.
*
* @param FOFForm $form The JForm object to attach to the form field.
*
* @return FOFFormHeader The form field object so that the method can be used in a chain.
*
* @since 2.0
*/
public function setForm(FOFForm $form)
{
$this->form = $form;
return $this;
}
/**
* Method to attach a FOFForm object to the field.
*
* @param SimpleXMLElement $element The SimpleXMLElement object representing the <field /> tag for the form field object.
* @param mixed $value The form field value to validate.
* @param string $group The field name group control value. This acts as as an array container for the field.
* For example if the field has name="foo" and the group value is set to "bar" then the
* full field name would end up being "bar[foo]".
*
* @return boolean True on success.
*
* @since 2.0
*/
public function setup(SimpleXMLElement $element, $value, $group = null)
{
// Make sure there is a valid JFormField XML element.
if ((string) $element->getName() != 'header')
{
return false;
}
// Reset the internal fields
$this->label = null;
$this->header = null;
$this->filter = null;
$this->buttons = null;
$this->options = null;
$this->value = null;
$this->filterSource = null;
// Set the XML element object.
$this->element = $element;
// Get some important attributes from the form field element.
$class = (string) $element['class'];
$id = (string) $element['id'];
$name = (string) $element['name'];
$filterSource = (string) $element['filter_source'];
$tdwidth = (string) $element['tdwidth'];
// Set the field description text.
$this->description = (string) $element['description'];
// Set the group of the field.
$this->group = $group;
// Set the td width of the field.
$this->tdwidth = $tdwidth;
// Set the field name and id.
$this->fieldname = $this->getFieldName($name);
$this->name = $this->getName($this->fieldname);
$this->id = $this->getId($id, $this->fieldname);
$this->filterSource = $this->getFilterSource($filterSource);
// Set the field default value.
$this->value = $this->getValue();
return true;
}
/**
* Method to get the id used for the field input tag.
*
* @param string $fieldId The field element id.
* @param string $fieldName The field element name.
*
* @return string The id to be used for the field input tag.
*
* @since 2.0
*/
protected function getId($fieldId, $fieldName)
{
$id = '';
// If the field is in a group add the group control to the field id.
if ($this->group)
{
// If we already have an id segment add the group control as another level.
if ($id)
{
$id .= '_' . str_replace('.', '_', $this->group);
}
else
{
$id .= str_replace('.', '_', $this->group);
}
}
// If we already have an id segment add the field id/name as another level.
if ($id)
{
$id .= '_' . ($fieldId ? $fieldId : $fieldName);
}
else
{
$id .= ($fieldId ? $fieldId : $fieldName);
}
// Clean up any invalid characters.
$id = preg_replace('#\W#', '_', $id);
return $id;
}
/**
* Method to get the name used for the field input tag.
*
* @param string $fieldName The field element name.
*
* @return string The name to be used for the field input tag.
*
* @since 2.0
*/
protected function getName($fieldName)
{
$name = '';
// If the field is in a group add the group control to the field name.
if ($this->group)
{
// If we already have a name segment add the group control as another level.
$groups = explode('.', $this->group);
if ($name)
{
foreach ($groups as $group)
{
$name .= '[' . $group . ']';
}
}
else
{
$name .= array_shift($groups);
foreach ($groups as $group)
{
$name .= '[' . $group . ']';
}
}
}
// If we already have a name segment add the field name as another level.
if ($name)
{
$name .= '[' . $fieldName . ']';
}
else
{
$name .= $fieldName;
}
return $name;
}
/**
* Method to get the field name used.
*
* @param string $fieldName The field element name.
*
* @return string The field name
*
* @since 2.0
*/
protected function getFieldName($fieldName)
{
return $fieldName;
}
/**
* Method to get the field label.
*
* @return string The field label.
*
* @since 2.0
*/
protected function getLabel()
{
// Get the label text from the XML element, defaulting to the element name.
$title = $this->element['label'] ? (string) $this->element['label'] : '';
if (empty($title))
{
$view = $this->form->getView();
$params = $view->getViewOptionAndName();
$title = $params['option'] . '_' .
FOFInflector::pluralize($params['view']) . '_FIELD_' .
(string) $this->element['name'];
$title = strtoupper($title);
$result = JText::_($title);
if ($result === $title)
{
$title = ucfirst((string) $this->element['name']);
}
}
return $title;
}
/**
* Get the filter value for this header field
*
* @return mixed The filter value
*/
protected function getValue()
{
$model = $this->form->getModel();
return $model->getState($this->filterSource);
}
/**
* Return the key of the filter value in the model state or, if it's not set,
* the name of the field.
*
* @param string $filterSource The filter source value to return
*
* @return string
*/
protected function getFilterSource($filterSource)
{
if ($filterSource)
{
return $filterSource;
}
else
{
return $this->name;
}
}
/**
* Is this a sortable field?
*
* @return boolean True if it's sortable
*/
protected function getSortable()
{
$sortable = ($this->element['sortable'] != 'false');
if ($sortable)
{
if (empty($this->header))
{
$this->header = $this->getHeader();
}
$sortable = !empty($this->header);
}
return $sortable;
}
/**
* Returns the HTML for the header row, or null if this element should
* render no header element
*
* @return string|null HTML code or null if nothing is to be rendered
*
* @since 2.0
*/
protected function getHeader()
{
return null;
}
/**
* Returns the HTML for a text filter to be rendered in the filter row,
* or null if this element should render no text input filter.
*
* @return string|null HTML code or null if nothing is to be rendered
*
* @since 2.0
*/
protected function getFilter()
{
return null;
}
/**
* Returns the HTML for the buttons to be rendered in the filter row,
* next to the text input filter, or null if this element should render no
* text input filter buttons.
*
* @return string|null HTML code or null if nothing is to be rendered
*
* @since 2.0
*/
protected function getButtons()
{
return null;
}
/**
* Returns the JHtml options for a drop-down filter. Do not include an
* empty option, it is added automatically.
*
* @return array The JHtml options for a drop-down filter
*
* @since 2.0
*/
protected function getOptions()
{
return array();
}
}