<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Form/classes/class.ilIdentifiedMultiValuesInputGUI.php';
require_once 'Services/UIComponent/Glyph/classes/class.ilGlyphGUI.php';

/**
 * @author        Björn Heyser <bheyser@databay.de>
 * @version        $Id$
 *
 * @package        Modules/Test(QuestionPool)
 */
abstract class ilMultipleImagesInputGUI extends ilIdentifiedMultiValuesInputGUI
{
    const RENDERING_TEMPLATE = 'tpl.prop_multi_image_inp.html';
    
    const ITERATOR_SUBFIELD_NAME = 'iteratorfield';
    const STORED_IMAGE_SUBFIELD_NAME = 'storedimage';
    const IMAGE_UPLOAD_SUBFIELD_NAME = 'imageupload';
    
    const FILE_DATA_INDEX_DODGING_FILE = 'dodging_file';
    /**
     * @var bool
     */
    protected $editElementOccuranceEnabled = false;
    
    /**
     * @var bool
     */
    protected $editElementOrderEnabled = false;
    
    /**
     * @var array
     */
    protected $suffixes = array();
    
    protected $imageRemovalCommand = 'removeImage';
    
    protected $imageUploadCommand = 'uploadImage';
    
    /**
     * Constructor
     *
     * @param	string	$a_title	Title
     * @param	string	$a_postvar	Post Variable
     */
    public function __construct($a_title = "", $a_postvar = "")
    {
        global $DIC;

        $this->lng = $DIC->language();
        parent::__construct($a_title, $a_postvar);
        
        $this->setSuffixes(array("jpg", "jpeg", "png", "gif"));
        $this->setSize('25');
        $this->validationRegexp = "";

        require_once 'Services/Form/classes/class.ilMultipleImagesAdditionalIndexLevelRemover.php';
        $manipulator = new ilMultipleImagesAdditionalIndexLevelRemover();
        $manipulator->setPostVar($this->getPostVar());
        $this->addFormValuesManipulator($manipulator);

        require_once 'Services/Form/classes/class.ilMultipleImagesFileSubmissionDataCompletion.php';
        $manipulator = new ilMultipleImagesFileSubmissionDataCompletion();
        $manipulator->setPostVar($this->getPostVar());
        $this->addFormValuesManipulator($manipulator);
        
        require_once 'Services/Form/classes/class.ilIdentifiedMultiFilesJsPositionIndexRemover.php';
        $manipulator = new ilIdentifiedMultiFilesJsPositionIndexRemover();
        $manipulator->setPostVar($this->getPostVar());
        $this->addFormValuesManipulator($manipulator);
        
        require_once 'Services/Form/classes/class.ilMultiFilesSubmitRecursiveSlashesStripper.php';
        $manipulator = new ilMultiFilesSubmitRecursiveSlashesStripper();
        $manipulator->setPostVar($this->getPostVar());
        $this->addFormValuesManipulator($manipulator);
    }
    
    /**
     * Set Accepted Suffixes.
     *
     * @param	array	$a_suffixes	Accepted Suffixes
     */
    public function setSuffixes($a_suffixes)
    {
        $this->suffixes = $a_suffixes;
    }
    
    /**
     * Get Accepted Suffixes.
     *
     * @return	array	Accepted Suffixes
     */
    public function getSuffixes()
    {
        return $this->suffixes;
    }
    
    /**
     * @return string
     */
    public function getImageRemovalCommand()
    {
        return $this->imageRemovalCommand;
    }
    
    /**
     * @param string $imageRemovalCommand
     */
    public function setImageRemovalCommand($imageRemovalCommand)
    {
        $this->imageRemovalCommand = $imageRemovalCommand;
    }
    
    /**
     * @return string
     */
    public function getImageUploadCommand()
    {
        return $this->imageUploadCommand;
    }
    
    /**
     * @param string $imageUploadCommand
     */
    public function setImageUploadCommand($imageUploadCommand)
    {
        $this->imageUploadCommand = $imageUploadCommand;
    }
    
    /**
     * @return	boolean $editElementOccuranceEnabled
     */
    public function isEditElementOccuranceEnabled()
    {
        return $this->editElementOccuranceEnabled;
    }
    
    /**
     * @param	boolean	$editElementOccuranceEnabled
     */
    public function setEditElementOccuranceEnabled($editElementOccuranceEnabled)
    {
        $this->editElementOccuranceEnabled = $editElementOccuranceEnabled;
    }
    
    /**
     * @return boolean
     */
    public function isEditElementOrderEnabled()
    {
        return $this->editElementOrderEnabled;
    }
    
    /**
     * @param boolean $editElementOrderEnabled
     */
    public function setEditElementOrderEnabled($editElementOrderEnabled)
    {
        $this->editElementOrderEnabled = $editElementOrderEnabled;
    }
    
    /**
     * @param mixed $value
     * @return bool
     */
    abstract protected function isValidFilenameInput($filenameInput);
    
    /**
     * Check input, strip slashes etc. set alert, if input is not ok.
     *
     * @return	boolean	$validationSuccess
     */
    public function onCheckInput()
    {
        $lng = $GLOBALS['DIC'] ? $GLOBALS['DIC']['lng'] : $GLOBALS['lng'];
        $F = $_FILES[$this->getPostVar()];
        if ($F && isset($_REQUEST[$this->getPostVar()][self::FILE_DATA_INDEX_DODGING_FILE])) {
            $F = array_merge(array(self::FILE_DATA_INDEX_DODGING_FILE => $_REQUEST[$this->getPostVar()][self::FILE_DATA_INDEX_DODGING_FILE]), $F);
        }

        if ($this->getRequired() && !is_array($F['error'])) {
            $this->setAlert($lng->txt("form_msg_file_no_upload"));
            return false;
        } else {
            foreach ($F['error'] as $index => $error) {
                // error handling
                if ($error > 0) {
                    switch ($error) {
                    case UPLOAD_ERR_INI_SIZE:
                        $this->setAlert($lng->txt("form_msg_file_size_exceeds"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_FORM_SIZE:
                        $this->setAlert($lng->txt("form_msg_file_size_exceeds"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_PARTIAL:
                        $this->setAlert($lng->txt("form_msg_file_partially_uploaded"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_NO_FILE:
                        if (!$this->getRequired()) {
                            break;
                        } elseif (strlen($F[self::FILE_DATA_INDEX_DODGING_FILE][$index])) {
                            break;
                        }
                        $this->setAlert($lng->txt("form_msg_file_no_upload"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_NO_TMP_DIR:
                        $this->setAlert($lng->txt("form_msg_file_missing_tmp_dir"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_CANT_WRITE:
                        $this->setAlert($lng->txt("form_msg_file_cannot_write_to_disk"));
                        return false;
                        break;
                    
                    case UPLOAD_ERR_EXTENSION:
                        $this->setAlert($lng->txt("form_msg_file_upload_stopped_ext"));
                        return false;
                        break;
                }
                }
            }
        }
        
        if (is_array($F['tmp_name'])) {
            foreach ($F['tmp_name'] as $index => $tmpname) {
                $filename = $F['name'][$index];
                $filename_arr = pathinfo($filename);
                $suffix = $filename_arr["extension"];
                $mimetype = $F['type'][$index];
                $size_bytes = $F['size'][$index];
                // check suffixes
                if (strlen($tmpname) && is_array($this->getSuffixes())) {
                    if (!in_array(strtolower($suffix), $this->getSuffixes())) {
                        $this->setAlert($lng->txt("form_msg_file_wrong_file_type"));
                        return false;
                    }
                }
            }
        }
        
        foreach ($F['tmp_name'] as $index => $tmpname) {
            $filename = $F['name'][$index];
            $filename_arr = pathinfo($filename);
            $suffix = $filename_arr["extension"];
            $mimetype = $F['type'][$index];
            $size_bytes = $F['size'][$index];
            // virus handling
            if (strlen($tmpname)) {
                $vir = ilUtil::virusHandling($tmpname, $filename);
                if ($vir[0] == false) {
                    $this->setAlert($lng->txt("form_msg_file_virus_found") . "<br />" . $vir[1]);
                    return false;
                }
            }
        }
        
        return $this->checkSubItemsInput();
    }
    
    /**
     * @param string $mode
     * @return string
     */
    public function render($a_mode = "")
    {
        $lng = $this->lng;
        
        $tpl = $this->getTemplate();
        $i = 0;
        foreach ($this->getIdentifiedMultiValues() as $identifier => $value) {
            if ($this->valueHasContentImageSource($value)) {
                $tpl->setCurrentBlock('image');
                
                $tpl->setVariable('STORED_IMAGE_SRC', $this->fetchContentImageSourceFromValue($value));
                $tpl->setVariable('STORED_IMAGE_ALT', ilUtil::prepareFormOutput($this->fetchContentImageTitleFromValue($value)));
                $tpl->setVariable('STORED_IMAGE_FILENAME', $this->fetchContentImageTitleFromValue($value));
                $tpl->setVariable("STORED_IMAGE_POST_VAR", $this->getMultiValuePostVarSubFieldPosIndexed($identifier, self::STORED_IMAGE_SUBFIELD_NAME, $i));
                
                $tpl->setVariable("TXT_DELETE_EXISTING", $lng->txt("delete_existing_file"));
                $tpl->setVariable("IMAGE_CMD_REMOVE", $this->buildMultiValueSubmitVar($identifier, $i, $this->getImageRemovalCommand()));
                
                $tpl->parseCurrentBlock();
            }
            
            $tpl->setCurrentBlock('addimage');
            
            $tpl->setVariable("IMAGE_BROWSE", $lng->txt('select_file'));
            $tpl->setVariable("IMAGE_ID", $this->getMultiValuePosIndexedSubFieldId($identifier, self::IMAGE_UPLOAD_SUBFIELD_NAME, $i));
            $tpl->setVariable("TXT_IMAGE_SUBMIT", $lng->txt("upload"));
            $tpl->setVariable("IMAGE_CMD_UPLOAD", $this->buildMultiValueSubmitVar($identifier, $i, $this->getImageUploadCommand()));
            $tpl->setVariable("UPLOAD_IMAGE_POST_VAR", $this->getMultiValuePostVarSubFieldPosIndexed($identifier, self::IMAGE_UPLOAD_SUBFIELD_NAME, $i));
            $tpl->setVariable("COUNT_POST_VAR", $this->getMultiValuePostVarSubFieldPosIndexed($identifier, self::ITERATOR_SUBFIELD_NAME, $i));
            
            $tpl->parseCurrentBlock();
            
            if ($this->isEditElementOrderEnabled()) {
                $tpl->setCurrentBlock("move");
                $tpl->setVariable("ID_UP", $this->getMultiValuePosIndexedSubFieldId($identifier, 'up', $i));
                $tpl->setVariable("ID_DOWN", $this->getMultiValuePosIndexedSubFieldId($identifier, 'down', $i));
                $tpl->setVariable("CMD_UP", $this->buildMultiValueSubmitVar($identifier, $i, 'up'));
                $tpl->setVariable("CMD_DOWN", $this->buildMultiValueSubmitVar($identifier, $i, 'down'));
                $tpl->setVariable("UP_BUTTON", ilGlyphGUI::get(ilGlyphGUI::UP));
                $tpl->setVariable("DOWN_BUTTON", ilGlyphGUI::get(ilGlyphGUI::DOWN));
                $tpl->parseCurrentBlock();
            }
            
            if ($this->isEditElementOccuranceEnabled()) {
                $tpl->setCurrentBlock("row");
                $tpl->setVariable("ID_ADD", $this->getMultiValuePosIndexedSubFieldId($identifier, 'add', $i));
                $tpl->setVariable("ID_REMOVE", $this->getMultiValuePosIndexedSubFieldId($identifier, 'remove', $i));
                $tpl->setVariable("CMD_ADD", $this->buildMultiValueSubmitVar($identifier, $i, 'add'));
                $tpl->setVariable("CMD_REMOVE", $this->buildMultiValueSubmitVar($identifier, $i, 'remove'));
                $tpl->setVariable("ADD_BUTTON", ilGlyphGUI::get(ilGlyphGUI::ADD));
                $tpl->setVariable("REMOVE_BUTTON", ilGlyphGUI::get(ilGlyphGUI::REMOVE));
                $tpl->parseCurrentBlock();
            }
            
            $i++;
        }
        
        if (is_array($this->getSuffixes())) {
            $suff_str = $delim = "";
            foreach ($this->getSuffixes() as $suffix) {
                $suff_str .= $delim . "." . $suffix;
                $delim = ", ";
            }
            $tpl->setCurrentBlock('allowed_image_suffixes');
            $tpl->setVariable("TXT_ALLOWED_SUFFIXES", $lng->txt("file_allowed_suffixes") . " " . $suff_str);
            $tpl->parseCurrentBlock();
        }
        /*
        $tpl->setCurrentBlock("image_heading");
        $tpl->setVariable("ANSWER_IMAGE", $lng->txt('answer_image'));
        $tpl->parseCurrentBlock();
        */
        
        $tpl->setVariable("TXT_MAX_SIZE", ilUtil::getFileSizeInfo());
        $tpl->setVariable("ELEMENT_ID", $this->getPostVar());
        $tpl->setVariable("TEXT_YES", $lng->txt('yes'));
        $tpl->setVariable("TEXT_NO", $lng->txt('no'));
        $tpl->setVariable("DELETE_IMAGE_HEADER", $lng->txt('delete_image_header'));
        $tpl->setVariable("DELETE_IMAGE_QUESTION", $lng->txt('delete_image_question'));
        $tpl->setVariable("ANSWER_TEXT", $lng->txt('answer_text'));
        $tpl->setVariable("COMMANDS_TEXT", $lng->txt('actions'));
        
        if (!$this->getDisabled()) {
            $tpl->setCurrentBlock('js_engine_initialisation');
            $tpl->setVariable('UPLOAD_CMD', $this->getImageUploadCommand());
            $tpl->setVariable('REMOVE_CMD', $this->getImageRemovalCommand());
            $tpl->setVariable('ITERATOR', self::ITERATOR_SUBFIELD_NAME);
            $tpl->setVariable('STORED_IMAGE_POSTVAR', self::STORED_IMAGE_SUBFIELD_NAME);
            $tpl->setVariable('UPLOAD_IMAGE_POSTVAR', self::IMAGE_UPLOAD_SUBFIELD_NAME);
            $tpl->parseCurrentBlock();

            $globalTpl = $GLOBALS['DIC'] ? $GLOBALS['DIC']['tpl'] : $GLOBALS['tpl'];
            $globalTpl->addJavascript("./Services/Form/js/ServiceFormWizardInput.js");
            $globalTpl->addJavascript("./Services/Form/js/ServiceFormIdentifiedWizardInputExtend.js");
            //$globalTpl->addJavascript("./Services/Form/js/ServiceFormIdentifiedImageWizardInputConcrete.js");
        }
        
        return $tpl->get();
    }
    
    /**
     * @param $value
     * @return bool
     */
    protected function valueHasContentImageSource($value)
    {
        return isset($value['src']) && strlen($value['src']);
    }
    
    /**
     * @param $value
     * @return string
     */
    protected function fetchContentImageSourceFromValue($value)
    {
        if ($this->valueHasContentImageSource($value)) {
            return $value['src'];
        }
        
        return null;
    }
    
    /**
     * @param $value
     * @return bool
     */
    protected function valueHasContentImageTitle($value)
    {
        return isset($value['title']) && strlen($value['title']);
    }
    
    /**
     * @param string $value
     */
    protected function fetchContentImageTitleFromValue($value)
    {
        if ($this->valueHasContentImageTitle($value)) {
            return $value['title'];
        }
        
        return $this->fetchContentImageSourceFromValue($value);
    }
    
    /**
     * @return ilTemplate
     */
    protected function getTemplate()
    {
        return new ilTemplate(self::RENDERING_TEMPLATE, true, true, "Services/Form");
    }
}