<?php
/**
 * @package     Joomla.Platform
 * @subpackage  HTML
 *
 * @copyright   Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Utility class for creating HTML select lists
 *
 * @package     Joomla.Platform
 * @subpackage  HTML
 * @since       11.1
 */
abstract class JHtmlSelect
{
	/**
	 * Default values for options. Organized by option group.
	 *
	 * @var     array
	 * @since   11.1
	 */
	static protected $_optionDefaults = array(
		'option' => array('option.attr' => null, 'option.disable' => 'disable', 'option.id' => null, 'option.key' => 'value',
			'option.key.toHtml' => true, 'option.label' => null, 'option.label.toHtml' => true, 'option.text' => 'text',
			'option.text.toHtml' => true));

	/**
	 * Generates a yes/no radio list.
	 *
	 * @param   string  $name      The value of the HTML name attribute
	 * @param   array   $attribs   Additional HTML attributes for the <select> tag
	 * @param   string  $selected  The key that is selected
	 * @param   string  $yes       Language key for Yes
	 * @param   string  $no        Language key for no
	 * @param   string  $id        The id for the field
	 *
	 * @return  string  HTML for the radio list
	 *
	 * @since   11.1
	 * @see     JFormFieldRadio
	 */
	public static function booleanlist($name, $attribs = null, $selected = null, $yes = 'JYES', $no = 'JNO', $id = false)
	{
		$arr = array(JHtml::_('select.option', '0', JText::_($no)), JHtml::_('select.option', '1', JText::_($yes)));
		return JHtml::_('select.radiolist', $arr, $name, $attribs, 'value', 'text', (int) $selected, $id);
	}

	/**
	 * Generates an HTML selection list.
	 *
	 * @param   array    $data       An array of objects, arrays, or scalars.
	 * @param   string   $name       The value of the HTML name attribute.
	 * @param   mixed    $attribs    Additional HTML attributes for the <select> tag. This
	 *                               can be an array of attributes, or an array of options. Treated as options
	 *                               if it is the last argument passed. Valid options are:
	 *                               Format options, see {@see JHtml::$formatOptions}.
	 *                               Selection options, see {@see JHtmlSelect::options()}.
	 *                               list.attr, string|array: Additional attributes for the select
	 *                               element.
	 *                               id, string: Value to use as the select element id attribute.
	 *                               Defaults to the same as the name.
	 *                               list.select, string|array: Identifies one or more option elements
	 *                               to be selected, based on the option key values.
	 * @param   string   $optKey     The name of the object variable for the option value. If
	 *                               set to null, the index of the value array is used.
	 * @param   string   $optText    The name of the object variable for the option text.
	 * @param   mixed    $selected   The key that is selected (accepts an array or a string).
	 * @param   mixed    $idtag      Value of the field id or null by default
	 * @param   boolean  $translate  True to translate
	 *
	 * @return  string  HTML for the select list.
	 *
	 * @since   11.1
	 */
	public static function genericlist($data, $name, $attribs = null, $optKey = 'value', $optText = 'text', $selected = null, $idtag = false,
		$translate = false)
	{
		// Set default options
		$options = array_merge(JHtml::$formatOptions, array('format.depth' => 0, 'id' => false));
		if (is_array($attribs) && func_num_args() == 3)
		{
			// Assume we have an options array
			$options = array_merge($options, $attribs);
		}
		else
		{
			// Get options from the parameters
			$options['id'] = $idtag;
			$options['list.attr'] = $attribs;
			$options['list.translate'] = $translate;
			$options['option.key'] = $optKey;
			$options['option.text'] = $optText;
			$options['list.select'] = $selected;
		}
		$attribs = '';
		if (isset($options['list.attr']))
		{
			if (is_array($options['list.attr']))
			{
				$attribs = JArrayHelper::toString($options['list.attr']);
			}
			else
			{
				$attribs = $options['list.attr'];
			}
			if ($attribs != '')
			{
				$attribs = ' ' . $attribs;
			}
		}

		$id = $options['id'] !== false ? $options['id'] : $name;
		$id = str_replace(array('[', ']'), '', $id);

		$baseIndent = str_repeat($options['format.indent'], $options['format.depth']++);
		$html = $baseIndent . '<select' . ($id !== '' ? ' id="' . $id . '"' : '') . ' name="' . $name . '"' . $attribs . '>' . $options['format.eol']
			. self::options($data, $options) . $baseIndent . '</select>' . $options['format.eol'];
		return $html;
	}

	/**
	 * Generates a grouped HTML selection list from nested arrays.
	 *
	 * @param   array   $data     An array of groups, each of which is an array of options.
	 * @param   string  $name     The value of the HTML name attribute
	 * @param   array   $options  Options, an array of key/value pairs. Valid options are:
	 *                            Format options, {@see JHtml::$formatOptions}.
	 *                            Selection options. See {@see JHtmlSelect::options()}.
	 *                            group.id: The property in each group to use as the group id
	 *                            attribute. Defaults to none.
	 *                            group.label: The property in each group to use as the group
	 *                            label. Defaults to "text". If set to null, the data array index key is
	 *                            used.
	 *                            group.items: The property in each group to use as the array of
	 *                            items in the group. Defaults to "items". If set to null, group.id and
	 *                            group. label are forced to null and the data element is assumed to be a
	 *                            list of selections.
	 *                            id: Value to use as the select element id attribute. Defaults to
	 *                            the same as the name.
	 *                            list.attr: Attributes for the select element. Can be a string or
	 *                            an array of key/value pairs. Defaults to none.
	 *                            list.select: either the value of one selected option or an array
	 *                            of selected options. Default: none.
	 *                            list.translate: Boolean. If set, text and labels are translated via
	 *                            JText::_().
	 *
	 * @return  string  HTML for the select list
	 *
	 * @since   11.1
	 *
	 * @throws  JException If a group has unprocessable contents.
	 */
	public static function groupedlist($data, $name, $options = array())
	{
		// Set default options and overwrite with anything passed in
		$options = array_merge(
			JHtml::$formatOptions,
			array('format.depth' => 0, 'group.items' => 'items', 'group.label' => 'text', 'group.label.toHtml' => true, 'id' => false),
			$options
		);

		// Apply option rules
		if ($options['group.items'] === null)
		{
			$options['group.label'] = null;
		}

		$attribs = '';

		if (isset($options['list.attr']))
		{
			if (is_array($options['list.attr']))
			{
				$attribs = JArrayHelper::toString($options['list.attr']);
			}
			else
			{
				$attribs = $options['list.attr'];
			}
			if ($attribs != '')
			{
				$attribs = ' ' . $attribs;
			}
		}

		$id = $options['id'] !== false ? $options['id'] : $name;
		$id = str_replace(array('[', ']'), '', $id);

		// Disable groups in the options.
		$options['groups'] = false;

		$baseIndent = str_repeat($options['format.indent'], $options['format.depth']++);
		$html = $baseIndent . '<select' . ($id !== '' ? ' id="' . $id . '"' : '') . ' name="' . $name . '"' . $attribs . '>' . $options['format.eol'];
		$groupIndent = str_repeat($options['format.indent'], $options['format.depth']++);

		foreach ($data as $dataKey => $group)
		{
			$label = $dataKey;
			$id = '';
			$noGroup = is_int($dataKey);

			if ($options['group.items'] == null)
			{
				// Sub-list is an associative array
				$subList = $group;
			}
			elseif (is_array($group))
			{
				// Sub-list is in an element of an array.
				$subList = $group[$options['group.items']];
				if (isset($group[$options['group.label']]))
				{
					$label = $group[$options['group.label']];
					$noGroup = false;
				}
				if (isset($options['group.id']) && isset($group[$options['group.id']]))
				{
					$id = $group[$options['group.id']];
					$noGroup = false;
				}
			}
			elseif (is_object($group))
			{
				// Sub-list is in a property of an object
				$subList = $group->$options['group.items'];
				if (isset($group->$options['group.label']))
				{
					$label = $group->$options['group.label'];
					$noGroup = false;
				}
				if (isset($options['group.id']) && isset($group->$options['group.id']))
				{
					$id = $group->$options['group.id'];
					$noGroup = false;
				}
			}
			else
			{
				throw new JException('Invalid group contents.', 1, E_WARNING);
			}

			if ($noGroup)
			{
				$html .= self::options($subList, $options);
			}
			else
			{
				$html .= $groupIndent . '<optgroup' . (empty($id) ? '' : ' id="' . $id . '"') . ' label="'
					. ($options['group.label.toHtml'] ? htmlspecialchars($label, ENT_COMPAT, 'UTF-8') : $label) . '">' . $options['format.eol']
					. self::options($subList, $options) . $groupIndent . '</optgroup>' . $options['format.eol'];
			}
		}

		$html .= $baseIndent . '</select>' . $options['format.eol'];

		return $html;
	}

	/**
	 * Generates a selection list of integers.
	 *
	 * @param   integer  $start     The start integer
	 * @param   integer  $end       The end integer
	 * @param   integer  $inc       The increment
	 * @param   string   $name      The value of the HTML name attribute
	 * @param   mixed    $attribs   Additional HTML attributes for the <select> tag, an array of
	 *                              attributes, or an array of options. Treated as options if it is the last
	 *                              argument passed.
	 * @param   mixed    $selected  The key that is selected
	 * @param   string   $format    The printf format to be applied to the number
	 *
	 * @return  string   HTML for the select list
	 *
	 * @since    11.1
	 */
	public static function integerlist($start, $end, $inc, $name, $attribs = null, $selected = null, $format = '')
	{
		// Set default options
		$options = array_merge(JHtml::$formatOptions, array('format.depth' => 0, 'option.format' => '', 'id' => null));
		if (is_array($attribs) && func_num_args() == 5)
		{
			// Assume we have an options array
			$options = array_merge($options, $attribs);
			// Extract the format and remove it from downstream options
			$format = $options['option.format'];
			unset($options['option.format']);
		}
		else
		{
			// Get options from the parameters
			$options['list.attr'] = $attribs;
			$options['list.select'] = $selected;
		}
		$start = intval($start);
		$end = intval($end);
		$inc = intval($inc);

		$data = array();
		for ($i = $start; $i <= $end; $i += $inc)
		{
			$data[$i] = $format ? sprintf($format, $i) : $i;
		}

		// Tell genericlist() to use array keys
		$options['option.key'] = null;

		return JHtml::_('select.genericlist', $data, $name, $options);
	}

	/**
	 * Create a placeholder for an option group.
	 *
	 * @param   string  $text     The text for the option
	 * @param   string  $optKey   The returned object property name for the value
	 * @param   string  $optText  The returned object property name for the text
	 *
	 * @return  object
	 *
	 * @deprecated  12.1  Use JHtmlSelect::groupedList()
	 * @see     JHtmlSelect::groupedList()
	 * @since   11.1
	 */
	public static function optgroup($text, $optKey = 'value', $optText = 'text')
	{
		// Deprecation warning.
		JLog::add('JSelect::optgroup is deprecated.', JLog::WARNING, 'deprecated');

		// Set initial state
		static $state = 'open';

		// Toggle between open and close states:
		switch ($state)
		{
			case 'open':
				$obj = new stdClass;
				$obj->$optKey = '<OPTGROUP>';
				$obj->$optText = $text;
				$state = 'close';
				break;
			case 'close':
				$obj = new stdClass;
				$obj->$optKey = '</OPTGROUP>';
				$obj->$optText = $text;
				$state = 'open';
				break;
		}

		return $obj;
	}

	/**
	 * Create an object that represents an option in an option list.
	 *
	 * @param   string   $value    The value of the option
	 * @param   string   $text     The text for the option
	 * @param   mixed    $optKey   If a string, the returned object property name for
	 *                             the value. If an array, options. Valid options are:
	 *                             attr: String|array. Additional attributes for this option.
	 *                             Defaults to none.
	 *                             disable: Boolean. If set, this option is disabled.
	 *                             label: String. The value for the option label.
	 *                             option.attr: The property in each option array to use for
	 *                             additional selection attributes. Defaults to none.
	 *                             option.disable: The property that will hold the disabled state.
	 *                             Defaults to "disable".
	 *                             option.key: The property that will hold the selection value.
	 *                             Defaults to "value".
	 *                             option.label: The property in each option array to use as the
	 *                             selection label attribute. If a "label" option is provided, defaults to
	 *                             "label", if no label is given, defaults to null (none).
	 *                             option.text: The property that will hold the the displayed text.
	 *                             Defaults to "text". If set to null, the option array is assumed to be a
	 *                             list of displayable scalars.
	 * @param   string   $optText  The property that will hold the the displayed text. This
	 *                             parameter is ignored if an options array is passed.
	 * @param   boolean  $disable  Not used.
	 *
	 * @return  object
	 *
	 * @since   11.1
	 */
	public static function option($value, $text = '', $optKey = 'value', $optText = 'text', $disable = false)
	{
		$options = array('attr' => null, 'disable' => false, 'option.attr' => null, 'option.disable' => 'disable', 'option.key' => 'value',
			'option.label' => null, 'option.text' => 'text');
		if (is_array($optKey))
		{
			// Merge in caller's options
			$options = array_merge($options, $optKey);
		}
		else
		{
			// Get options from the parameters
			$options['option.key'] = $optKey;
			$options['option.text'] = $optText;
			$options['disable'] = $disable;
		}
		$obj = new JObject;
		$obj->$options['option.key'] = $value;
		$obj->$options['option.text'] = trim($text) ? $text : $value;

		/*
		 * If a label is provided, save it. If no label is provided and there is
		 * a label name, initialise to an empty string.
		 */
		$hasProperty = $options['option.label'] !== null;
		if (isset($options['label']))
		{
			$labelProperty = $hasProperty ? $options['option.label'] : 'label';
			$obj->$labelProperty = $options['label'];
		}
		elseif ($hasProperty)
		{
			$obj->$options['option.label'] = '';
		}

		// Set attributes only if there is a property and a value
		if ($options['attr'] !== null)
		{
			$obj->$options['option.attr'] = $options['attr'];
		}

		// Set disable only if it has a property and a value
		if ($options['disable'] !== null)
		{
			$obj->$options['option.disable'] = $options['disable'];
		}
		return $obj;
	}

	/**
	 * Generates the option tags for an HTML select list (with no select tag
	 * surrounding the options).
	 *
	 * @param   array    $arr        An array of objects, arrays, or values.
	 * @param   mixed    $optKey     If a string, this is the name of the object variable for
	 *                               the option value. If null, the index of the array of objects is used. If
	 *                               an array, this is a set of options, as key/value pairs. Valid options are:
	 *                               -Format options, {@see JHtml::$formatOptions}.
	 *                               -groups: Boolean. If set, looks for keys with the value
	 *                                "&lt;optgroup>" and synthesizes groups from them. Deprecated. Defaults
	 *                                true for backwards compatibility.
	 *                               -list.select: either the value of one selected option or an array
	 *                                of selected options. Default: none.
	 *                               -list.translate: Boolean. If set, text and labels are translated via
	 *                                JText::_(). Default is false.
	 *                               -option.id: The property in each option array to use as the
	 *                                selection id attribute. Defaults to none.
	 *                               -option.key: The property in each option array to use as the
	 *                                selection value. Defaults to "value". If set to null, the index of the
	 *                                option array is used.
	 *                               -option.label: The property in each option array to use as the
	 *                                selection label attribute. Defaults to null (none).
	 *                               -option.text: The property in each option array to use as the
	 *                               displayed text. Defaults to "text". If set to null, the option array is
	 *                               assumed to be a list of displayable scalars.
	 *                               -option.attr: The property in each option array to use for
	 *                                additional selection attributes. Defaults to none.
	 *                               -option.disable: The property that will hold the disabled state.
	 *                                Defaults to "disable".
	 *                               -option.key: The property that will hold the selection value.
	 *                                Defaults to "value".
	 *                               -option.text: The property that will hold the the displayed text.
	 *                               Defaults to "text". If set to null, the option array is assumed to be a
	 *                               list of displayable scalars.
	 * @param   string   $optText    The name of the object variable for the option text.
	 * @param   mixed    $selected   The key that is selected (accepts an array or a string)
	 * @param   boolean  $translate  Translate the option values.
	 *
	 * @return  string  HTML for the select list
	 *
	 * @since   11.1
	 */
	public static function options($arr, $optKey = 'value', $optText = 'text', $selected = null, $translate = false)
	{
		$options = array_merge(
			JHtml::$formatOptions,
			self::$_optionDefaults['option'],
			array('format.depth' => 0, 'groups' => true, 'list.select' => null, 'list.translate' => false)
		);

		if (is_array($optKey))
		{
			// Set default options and overwrite with anything passed in
			$options = array_merge($options, $optKey);
		}
		else
		{
			// Get options from the parameters
			$options['option.key'] = $optKey;
			$options['option.text'] = $optText;
			$options['list.select'] = $selected;
			$options['list.translate'] = $translate;
		}

		$html = '';
		$baseIndent = str_repeat($options['format.indent'], $options['format.depth']);

		foreach ($arr as $elementKey => &$element)
		{
			$attr = '';
			$extra = '';
			$label = '';
			$id = '';
			if (is_array($element))
			{
				$key = $options['option.key'] === null ? $elementKey : $element[$options['option.key']];
				$text = $element[$options['option.text']];
				if (isset($element[$options['option.attr']]))
				{
					$attr = $element[$options['option.attr']];
				}
				if (isset($element[$options['option.id']]))
				{
					$id = $element[$options['option.id']];
				}
				if (isset($element[$options['option.label']]))
				{
					$label = $element[$options['option.label']];
				}
				if (isset($element[$options['option.disable']]) && $element[$options['option.disable']])
				{
					$extra .= ' disabled="disabled"';
				}
			}
			elseif (is_object($element))
			{
				$key = $options['option.key'] === null ? $elementKey : $element->$options['option.key'];
				$text = $element->$options['option.text'];
				if (isset($element->$options['option.attr']))
				{
					$attr = $element->$options['option.attr'];
				}
				if (isset($element->$options['option.id']))
				{
					$id = $element->$options['option.id'];
				}
				if (isset($element->$options['option.label']))
				{
					$label = $element->$options['option.label'];
				}
				if (isset($element->$options['option.disable']) && $element->$options['option.disable'])
				{
					$extra .= ' disabled="disabled"';
				}
			}
			else
			{
				// This is a simple associative array
				$key = $elementKey;
				$text = $element;
			}

			// The use of options that contain optgroup HTML elements was
			// somewhat hacked for J1.5. J1.6 introduces the grouplist() method
			// to handle this better. The old solution is retained through the
			// "groups" option, which defaults true in J1.6, but should be
			// deprecated at some point in the future.

			$key = (string) $key;
			if ($options['groups'] && $key == '<OPTGROUP>')
			{
				$html .= $baseIndent . '<optgroup label="' . ($options['list.translate'] ? JText::_($text) : $text) . '">' . $options['format.eol'];
				$baseIndent = str_repeat($options['format.indent'], ++$options['format.depth']);
			}
			elseif ($options['groups'] && $key == '</OPTGROUP>')
			{
				$baseIndent = str_repeat($options['format.indent'], --$options['format.depth']);
				$html .= $baseIndent . '</optgroup>' . $options['format.eol'];
			}
			else
			{
				// if no string after hyphen - take hyphen out
				$splitText = explode(' - ', $text, 2);
				$text = $splitText[0];
				if (isset($splitText[1]))
				{
					$text .= ' - ' . $splitText[1];
				}

				if ($options['list.translate'] && !empty($label))
				{
					$label = JText::_($label);
				}
				if ($options['option.label.toHtml'])
				{
					$label = htmlentities($label);
				}
				if (is_array($attr))
				{
					$attr = JArrayHelper::toString($attr);
				}
				else
				{
					$attr = trim($attr);
				}
				$extra = ($id ? ' id="' . $id . '"' : '') . ($label ? ' label="' . $label . '"' : '') . ($attr ? ' ' . $attr : '') . $extra;
				if (is_array($options['list.select']))
				{
					foreach ($options['list.select'] as $val)
					{
						$key2 = is_object($val) ? $val->$options['option.key'] : $val;
						if ($key == $key2)
						{
							$extra .= ' selected="selected"';
							break;
						}
					}
				}
				elseif ((string) $key == (string) $options['list.select'])
				{
					$extra .= ' selected="selected"';
				}

				if ($options['list.translate'])
				{
					$text = JText::_($text);
				}

				// Generate the option, encoding as required
				$html .= $baseIndent . '<option value="' . ($options['option.key.toHtml'] ? htmlspecialchars($key, ENT_COMPAT, 'UTF-8') : $key) . '"'
					. $extra . '>';
				$html .= $options['option.text.toHtml'] ? htmlentities(html_entity_decode($text, ENT_COMPAT, 'UTF-8'), ENT_COMPAT, 'UTF-8') : $text;
				$html .= '</option>' . $options['format.eol'];
			}
		}

		return $html;
	}

	/**
	 * Generates an HTML radio list.
	 *
	 * @param   array    $data       An array of objects
	 * @param   string   $name       The value of the HTML name attribute
	 * @param   string   $attribs    Additional HTML attributes for the <select> tag
	 * @param   mixed    $optKey     The key that is selected
	 * @param   string   $optText    The name of the object variable for the option value
	 * @param   string   $selected   The name of the object variable for the option text
	 * @param   boolean  $idtag      Value of the field id or null by default
	 * @param   boolean  $translate  True if options will be translated
	 *
	 * @return  string HTML for the select list
	 *
	 * @since  11.1
	 */
	public static function radiolist($data, $name, $attribs = null, $optKey = 'value', $optText = 'text', $selected = null, $idtag = false,
		$translate = false)
	{
		reset($data);
		$html = '';

		if (is_array($attribs))
		{
			$attribs = JArrayHelper::toString($attribs);
		}

		$id_text = $idtag ? $idtag : $name;

		foreach ($data as $obj)
		{
			$k = $obj->$optKey;
			$t = $translate ? JText::_($obj->$optText) : $obj->$optText;
			$id = (isset($obj->id) ? $obj->id : null);

			$extra = '';
			$extra .= $id ? ' id="' . $obj->id . '"' : '';
			if (is_array($selected))
			{
				foreach ($selected as $val)
				{
					$k2 = is_object($val) ? $val->$optKey : $val;
					if ($k == $k2)
					{
						$extra .= ' selected="selected"';
						break;
					}
				}
			}
			else
			{
				$extra .= ((string) $k == (string) $selected ? ' checked="checked"' : '');
			}
			$html .= "\n\t" . '<input type="radio" name="' . $name . '"' . ' id="' . $id_text . $k . '" value="' . $k . '"' . ' ' . $extra . ' '
				. $attribs . '/>' . "\n\t" . '<label for="' . $id_text . $k . '"' . ' id="' . $id_text . $k . '-lbl" class="radiobtn">' . $t
				. '</label>';
		}
		$html .= "\n";
		return $html;
	}

}
