class.ilCombinationInputGUI.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2008 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

class ilCombinationInputGUI extends ilSubEnabledFormPropertyGUI implements ilTableFilterItem
{
        protected $items = array();
        protected $labels;
        protected $comparison;

        const COMPARISON_ASCENDING = 1;
        const COMPARISON_DESCENDING = 2;

        function addCombinationItem($id, $item, $label = "")
        {
                $this->items[$id] = $item;
                if($label)
                {
                        $this->labels[$id] = $label;
                }
        }

        function getCombinationItem($id)
        {
                if(isset($this->items[$id]))
                {
                        return $this->items[$id];
                }
        }

        function removeCombinationItem($id)
        {
                if(isset($this->items[$id]))
                {
                        unset($this->items[$id]);
                }
        }

        function __call($method, $param)
        {
                $result = array();
                foreach($this->items as $id => $obj)
                {
                        if(method_exists($obj, $method))
                        {
                                $result[$id] = call_user_func_array(array($obj, $method), $param);
                        }
                }
                return $result;
        }

        function serializeData()
        {
                $result = array();
                foreach($this->items as $id => $obj)
                {
                        $result[$id] = $obj->serializeData();
                }
                return serialize($result);
        }

        function unserializeData($a_data)
        {
                $data = unserialize($a_data);

                if ($data)
                {
                        foreach($this->items as $id => $obj)
                        {
                                $obj->unserializeData($data[$id]);
                        }
                }
                else
                {
                        foreach($this->items as $id => $obj)
                        {
                                if(method_exists($obj, "setValue"))
                                {
                                        $this->setValue(false);
                                }
                        }
                }
        }

        function setComparisonMode($mode)
        {
                if(in_array($mode, array(self::COMPARISON_ASCENDING, self::COMPARISON_DESCENDING)))
                {
                        foreach($this->items as $obj)
                        {
                                if(!method_exists($obj, "getPostValueForComparison"))
                                {
                                        return false;
                                }
                        }
                        $this->comparison_mode = $mode;
                        return true;
                }
        }

        function setValue($a_value)
        {
                if(is_array($a_value))
                {
                        foreach($a_value as $id => $value)
                        {
                                if(isset($this->items[$id]))
                                {
                                        $this->items[$id]->setValue($value);
                                }
                        }
                }
                else if($a_value === NULL)
                {
                        foreach($this->items as $item)
                        {
                                if(method_exists($item, "setValue"))
                                {
                                        $item->setValue(NULL);
                                }
                                // datetime
                                else if(method_exists($item, "setDate"))
                                {
                                        $item->setDate();
                                }
                                // duration
                                else if(method_exists($item, "setMonths"))
                                {
                                        $item->setMonths(0);
                                        $item->setDays(0);
                                        $item->setHours(0);
                                        $item->setMinutes(0);
                                        $item->setSeconds(0);
                                }
                        }
                }
        }

        function getValue()
        {
                $result = array();
                foreach($this->items as $id => $obj)
                {
                        $result[$id] = $obj->getValue();
                }
                return $result;
        }

        function setValueByArray($a_values)
        {
                foreach($this->items as $id => $obj)
                {       
                        $obj->setValueByArray($a_values);
                }
        }

        function checkInput()
        {
                if(sizeof($this->items))
                {
                        foreach($this->items as $id => $obj)
                        {
                                if(!$obj->checkInput())
                                {
                                        return false;
                                }
                        }

                        if($this->comparison_mode)
                        {
                                $prev = NULL;
                                foreach($this->items as $id => $obj)
                                {
                                        $value = $obj->getPostValueForComparison();
                                        if($value != "")
                                        {
                                                if($prev !== NULL)
                                                {
                                                        if($this->comparison_mode == self::COMPARISON_ASCENDING)
                                                        {
                                                                if($value < $prev)
                                                                {
                                                                        return false;
                                                                }
                                                        }
                                                        else
                                                        {
                                                                if($value > $prev)
                                                                {
                                                                        return false;
                                                                }
                                                        }
                                                }
                                                $prev = $value;
                                        }
                                }
                        }
                }

                return $this->checkSubItemsInput();
        }

        function insert(&$a_tpl)
        {
                $html = $this->render();

                $a_tpl->setCurrentBlock("prop_generic");
                $a_tpl->setVariable("PROP_GENERIC", $html);
                $a_tpl->parseCurrentBlock();
        }

        function render()
        {
                global $lng;

                $tpl = new ilTemplate("tpl.prop_combination.html", true, true, "Services/Form");

                if(sizeof($this->items))
                {
                        foreach($this->items as $id => $obj)
                        {
                                // label
                                if(isset($this->labels[$id]))
                                {
                                        $tpl->setCurrentBlock("prop_combination_label");
                                        $tpl->setVariable("LABEL", $this->labels[$id]);
                                        $tpl->parseCurrentBlock();
                                }

                                $tpl->setCurrentBlock("prop_combination");
                                $tpl->setVariable("FIELD", $obj->render());
                                $tpl->parseCurrentBlock();
                        }
                }

                return $tpl->get();
        }

        function getTableFilterHTML()
        {
                $html = $this->render();
                return $html;
        }
}