<?php
class TimestopTask extends BaseTest{
    private $elements;
    private $task_type;
    
    function __construct($id = NULL) {
        $this->setType("TimestopTask");
        $this->setName("Time Stop Task");
        $this->setTable("timestop_task");
        $this->setActions(array("view"=>_("View"), "edit"=>_("Edit"), "compose"=>_("Compose")));
        if ($id) {
            $data = $this->load($id);
            if ($data) {
                $this->setElements($data->elements);
                $this->setTaskType($data->task_type);
            }
        }

    }
    
    function create() {
        if ($id = parent::create()) {
            $insert = query_insert("INSERT INTO " . DB_PREFIX . $this->getTable() . " (base_id, elements, task_type) values (".$id.", '".mysql_real_escape_string($this->getElements())."', ".$this->getTaskType().")");
            return $id;
        }
        return false; 
    }
    
    function save() {
        if (parent::save()) {
            $update = query_update("UPDATE " . DB_PREFIX . $this->getTable() . " SET elements='".mysql_real_escape_string($this->getElements())."', task_type=".$this->getTaskType()." WHERE base_id=".$this->getId());
            return $this->getId();
        }
        return false;     
    }
    
    function copy($locked=false) {
        $copy = $this->create();
        if ($copy && $locked) {
            $lock = $this->lock($copy);
        }
        return $copy;
    }
    
    function answer($data) {
        $examinee = get_examinee()->getId();
        $elements = json_decode($this->getElements());
        $answers = array();
        foreach ($elements as $element) {
            $answers["ks_element_".$element->nr] = array('title'=>$element->text, 'choice'=>0, 'nr'=>$element->nr, 'time'=>0);
        }
        $start = 0;
        $end = 0;
        if (isset($data['ksa_elements']) && $data['ksa_elements']!="") {
            $d = json_decode($data['ksa_elements']);
            $start = $d->begin;
            $end = $d->end;
            $ans = $d->play;
            foreach ($ans as $a) {
                $answers[$a->id]["choice"] = 2;
                $answers[$a->id]["time"] = $a->time;
            }
        }
        $answers = serialize($answers);
        $insert = query_insert("INSERT INTO " . DB_PREFIX . "ks_answer (base_id, examinee, elements, start, end) values (".$this->getId().", ".$examinee.", '".mysql_real_escape_string($answers)."', ".$start.", ".$end.")");
        if ($insert) {
            return true;
        }
        return false;
    }
    
    function collect($examinees) {
        $start = "start_time";
        $end = "end_time";
        $answers = array();
        $answers['title'][$start] = _("Start time");
        $answers['title'][$end] = _("End time");
        foreach ($examinees as $examinee) {
            $answer = query_row("SELECT *, a.elements as an_el FROM " . DB_PREFIX . "ks_task t LEFT JOIN " . DB_PREFIX . "ks_answer a ON t.base_id=a.base_id WHERE t.base_id=".$this->getId()." AND a.examinee=".$examinee);
            if ($answer) { 
                $answers[$examinee][$start] = $answer->start;
                $answers[$examinee][$end] = $answer->end;
                foreach (unserialize($answer->an_el) as $id => $element) {
                    $answers['title'][$id] = $element['title'];
                    $answers[$examinee][$id] = $element['choice'];
                }
            } else {
                $answers[$examinee][$start] = "-";
                $answers[$examinee][$end] = "-";
                foreach (json_decode($this->getElements()) as $element) {
                    $answers['title']['ks_element_'.$element->nr] = $element->text;
                    $answers[$examinee]['ks_element_'.$element->nr] = "-";;
                }
            }
        }
        $id = "kstask_".$this->getId();
        $title = _("None")." ".$this->getId();
        if ($this->getTitle()) $title = $this->getTitle();
        return array('id'=>$id, 'title'=>$title, 'answers'=>$answers);
    }
    
    function build($data) {
        if (parent::build($data)) {
            if (isset($data["ks_task_type"]) && !empty($data["ks_task_type"])) $this->setTaskType($data["ks_task_type"]);
            if ($this->getId() > 0) {
                return $this->save();
            } else {
                return $this->create();
            }
        }
      	return false;
    }
    
    function compose($data) {
        if (isset($data["ks_elements"]) && !empty($data["ks_elements"])) {
            $this->setElements($data["ks_elements"]);
            if ($this->getId() > 0) {
                $this->save();
                return true;
            }
      	}
      	return false;
    }
    
    function getElements() {
        return $this->elements;
    }
    
    function setElements($elements) {
        $this->elements = $elements;
    }
    
    function getTaskType() {
        return $this->task_type;
    }
    
    function setTaskType($tasktype) {
        $this->task_type = $tasktype;
    }
    
    function  buildFromXML($obj, $version=1, $folder=0) {
        parent::buildFromXML($obj, $folder);
        $elements = $obj["elements"];
        if ($version == 1) {
            $fp=popen("python unpickle.py \"".$elements."\"","r");
            $buffer = "";
            while (!feof($fp)) {
                $buffer .= fgets($fp, 4096);
            }
            pclose($fp); 
            $elements = json_decode($buffer);
            $els = array();
            $c = 0;
            foreach ($elements as $el) {
                $els []= "\"".$c."\":{\"x\":".$el[0].",\"y\":".$el[1].",\"text\":\"".$el[2]."\",\"type\":\"".$el[3]."\"}";
                $c++;
            }
            $els_str = "{".join($els, ",")."}";
        }
        $this->setElements($els_str);
        return $this->create();
    }
    
    function getObjectsXML() {
        $xml = "<elements><![CDATA[".$this->getElements()."]]></elements>\n";
        return $xml;
    }


}
?>