<?php
/*
*     Author: Alex Scott
*      Email: alex@cgi-central.net
*        Web: http://www.amember.com/
*    Release: 5.6.2
*    License: LGPL http://www.gnu.org/copyleft/lesser.html
*/

/**
 * Abstract grid filter class
 * @package Am_Grid
 */
abstract class Am_Grid_Filter_Abstract implements Am_Grid_Filter_Interface
{
    /** @var Am_Grid_ReadOnly */
    protected $grid;
    protected $gridId = "";
    protected $title = "";
    protected $buttonTitle = "";
    protected $varList = array(
        'filter'
    );
    // for text input
    protected $attributes = array();
    protected $vars = array();

    function __construct() {}

    public function getVariablesList()
    {
        return $this->varList;
    }

    public function initFilter(Am_Grid_ReadOnly $grid)
    {
        if (empty($this->buttonTitle))
            $this->buttonTitle = ___("Apply");
        $this->grid = $grid;
        $this->vars = array();
        foreach ($this->varList as $k)
            $this->vars[$k] = $this->grid->getRequest()->get($k);
        if ($this->isFiltered())
            $this->applyFilter();
    }

    /** apply filter using $this->vars array */
    abstract protected function applyFilter();

    public function isFiltered()
    {
        foreach ($this->vars as $k => $v) {
            if ((!is_array($v) && strlen($v)) || !empty($v)) {
                return true;
            }
        }
        return false;
    }

    public function getTitle()
    {
        return $this->title;
    }

    protected function getParam($name, $default=null)
    {
        return isset($this->vars[$name]) ? $this->vars[$name] : $default;
    }

    public function getAllButFilterVars()
    {
        $ret = array();
        $prefix = $this->grid->getId() . '_';
        foreach ($this->grid->getCompleteRequest()->toArray() as $k => $v)
        {
            if (strpos($k, $prefix)!==false)
            {
                $kk = substr($k, strlen($prefix));
                if (in_array($kk, $this->getVariablesList())) continue;
                if ($kk == 'p') continue; // skip page# too we do not want to see empty list
            }
            $ret[$k] = $v;
        }
        return $ret;
    }

    public function renderFilter()
    {
        $action = preg_replace('#\?.*#', '', $this->grid->getCompleteRequest()->REQUEST_URI);
        $action = htmlentities( $action, ENT_QUOTES, 'UTF-8');
        $title = $this->getTitle();
        $vars = $this->getAllButFilterVars();
        $hiddenInputs = Am_Html::renderArrayAsInputHiddens($vars);
        $inputs = $this->renderInputs();
        $button = $this->renderButton();
        return <<<CUT
<!-- start am-filter-wrap -->
<div class="am-filter-wrap">
    <form class="filter" method="get" action="$action">
        <div class="filter-button">
        $button
        </div>
        <div class="filter-inputs">
        $hiddenInputs
        $inputs
        </div>
        <div class="filter-title">$title</div>
    </form>
</div>
<!-- end am-filter-wrap -->
CUT;
    }

    abstract function renderInputs();

    protected function renderButton()
    {
        return sprintf('<input type="submit" value="" title="%s" class="gridFilterButton" />',
            htmlentities($this->buttonTitle, ENT_QUOTES, 'UTF-8'));
    }

    function renderStatic() {}

    function renderInputText($name = 'filter')
    {
        if (is_array($name)) {
            $attrs = $name;
            $name = isset($attrs['name']) ? $attrs['name'] : 'filter';
        } else {
            $attrs = $this->attributes;
        }

        $attrs["name"] = $this->grid->getId() . '_' . $name;
        $attrs["type"] = "text";

        if (!isset($attrs['value']))
            $attrs["value"] = $this->vars[$name];

        $out = "<input";
        foreach ($attrs as $k => $v)
            $out .= ' ' . $k . '="' . htmlentities($v, ENT_QUOTES, 'UTF-8') . '"';
        $out .= " />";
        return $out ;
    }

    function renderInputDate($name = 'filter')
    {
        if (is_array($name)) {
            $attrs = $name;
            $name = isset($attrs['name']) ? $attrs['name'] : 'filter';
        } else {
            $attrs = $this->attributes;
        }

        $attrs["name"] = $this->grid->getId() . '_' . $name;
        $attrs["type"] = "text";

        if (isset($attrs['class'])) {
            $attrs['class'] = $attrs['class'] . ' ' . 'datepicker';
        } else {
            $attrs['class'] = 'datepicker';
        }
        $attrs['size'] = isset($attrs['size']) ? $attrs['size'] : 10;

        if (!isset($attrs['value']))
            $attrs["value"] = $this->vars[$name];

        $out = "<input";
        foreach ($attrs as $k => $v)
            $out .= ' ' . $k . '="' . htmlentities($v, ENT_QUOTES, 'UTF-8') . '"';
        $out .= " />";
        return $out ;
    }

    function renderInputCheckboxes($name, $options)
    {
        $attrs = $this->attributes;
        $attrs["name"] = $this->grid->getId() . '_' . $name . '[]';
        $attrs["type"] = "checkbox";

        $out = '';
        foreach ($options as $k=>$title) {
            $attrs['value'] = $k;
            if (in_array($k, $this->getParam($name, array()))) {
                $attrs['checked'] = 'checked';
            } else {
                unset($attrs['checked']);
            }
            $out .= sprintf(' <label><input %s /> %s</label>', $this->renderAttributes($attrs), htmlentities($title, ENT_QUOTES, 'UTF-8'));
        }

        return $out ;
    }

    function renderInputSelect($name, $options, $attributes = array())
    {
        $out = '';

        foreach ($options as $value => $title) {
            $out .= is_array($title) ?
                $this->_renderOptgroup($name, $value, $title) :
                $this->_renderOption($name, $value, $title);
        }

        return sprintf('<select name="%s"%s>%s</select>',
                    $this->grid->getId() . '_' . $name,
                    $this->renderAttributes($attributes),
                    $out
                );
    }

    protected function _renderOption($name, $value, $title)
    {
        $param = substr($name, -2) == '[]' ? $this->getParam(substr($name, 0, -2)) : $this->getParam($name);
        return sprintf('<option value="%s"%s>%s</option>',
            htmlentities($value, ENT_QUOTES, 'UTF-8'),
            (in_array($value, (array)$param) ? ' selected="selected"' : ''),
            htmlentities($title, ENT_QUOTES, 'UTF-8')
        );
    }

    protected function _renderOptgroup($name, $title, $options)
    {
        $out = '';
        foreach ($options as $v => $t) {
            $out .= $this->_renderOption($name, $v, $t);
        }
        return sprintf('<optgroup label="%s">%s</optgroup>',
            htmlentities($title, ENT_QUOTES, 'UTF-8'), $out);
    }

    function renderAttributes($attributes)
    {
        $out = '';
        foreach ($attributes as $k => $v) {
            $out .= ' ' . $k . '="' . htmlentities($v, ENT_QUOTES, 'UTF-8') . '"';
        }
        return $out ;
    }
}