<?php

/**
 * File containing lesson class.
 *
 * @package    mod_timetable
 * @copyright  2020 Raphael Dannecker <raphael.dannecker@steinbeisschule-reutlingen.de>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace mod_timetable;

defined('MOODLE_INTERNAL') || die();

/**
 * Class lesson
 *
 * @package    mod_timetable
 * @copyright  2020 Raphael Dannecker <raphael.dannecker@steinbeisschule-reutlingen.de>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class lesson {

    /** @var array the data of lesson */
    public $data;

    /**
     * Class constructor
     *
     * @param object $lesson Lesson
     */
    public function __construct($lesson) {
       $this->lessonid= $lesson->lessonid;
       $this->teacher = $lesson->teacher;
       $this->subject = $lesson->subject;
       $this->class   = $lesson->class;
       $this->room    = $lesson->room;
       $this->period  = $lesson->period;
       $this->day     = $lesson->day;
       $this->text    = "";
       $this->substitution = "";
       $this->teachera = "";
       $this->subjecta = "";
       $this->classa   = "";
       $this->rooma    = "";
    }

    /**
     *
     * @param object $substitution Substitution
     */
    public function process_substitution($substitution) {
	   // echo "Entering substitution! $this->teacher, $this->subject, $this->class, $this->room \n\t $substitution->teacherb, $substitution->subjectb, $substitution->classb, $substitution->roomb\n";
       if (//$this->lessonid == $substitution->lesson && 
           $this->teacher  == $substitution->teacherb && 
           $this->subject  == $substitution->subjectb && 
           $this->class    == $substitution->classb && 
           $this->room     == $substitution->roomb) {
           //preg_match("(^|~)$this->teacher($|~)", $substitution->teacherb) && 
           //preg_match("(^|~)$this->subject($|~)", $substitution->subjectb) && 
           //preg_match("(^|~)$this->class($|~)",   $substitution->classb) && 
           //preg_match("(^|~)$this->room($|~)",    $substitution->roomb)) {
  
	   // Append change info
//          if (!preg_match("(^|~)$this->teacher($|~)", $substitution->teachera)) $this->teachera = $substitution->teachera;
//          if (!preg_match("(^|~)$this->subject($|~)", $substitution->subjecta)) $this->subjecta = $substitution->subjecta;
//          if (!preg_match("(^|~)$this->class($|~)"  , $substitution->classa  )) $this->classa   = $substitution->classa;
//          if (!preg_match("(^|~)$this->room($|~)"   , $substitution->rooma   )) $this->rooma    = $substitution->rooma;
          if ($this->teacher != $substitution->teachera) $this->teachera = $substitution->teachera;
          if ($this->subject != $substitution->subjecta) $this->subjecta = $substitution->subjecta;
          if ($this->class   != $substitution->classa  ) $this->classa   = $substitution->classa;
          if ($this->room    != $substitution->rooma   ) $this->rooma    = $substitution->rooma;
          if ($substitution->text) $this->text .= $substitution->text;
//	  echo "In substitution! $this->teachera, $this->subjecta, $this->classa, $this->rooma\n";
          $this->substitution = "1";
          return 1;
       } elseif (//$this->lessonid == $substitution->lesson && 
           $this->teacher  == $substitution->teachera && 
           $this->subject  == $substitution->subjecta && 
           $this->class    == $substitution->classa && 
           $this->room     == $substitution->rooma) {
          if ($substitution->text) $this->text .= $substitution->text;
          $this->type .= $substitution->type;
//	  echo "In substitution! $this->teachera, $this->subjecta, $this->classa, $this->rooma\n";
          #$this->substitution = "1";
          return 1;
       } else {
          return 0;
       }
    }

    /**
     *
     * @param object $absence Absence
     */
    public function process_absence($absence) {
//	  echo "Process_absence: $absence->endperiod";
       if ((($absence->type == 'L' && $absence->name == $this->teacher) ||
	    ($absence->type == 'K' && $absence->name == $this->class)   ||
	    ($absence->type == 'R' && $absence->name == $this->room)) &&
	    $absence->startperiod <= $this->period &&
	    $absence->endperiod   >= $this->period) {
          $this->text .= $absence->text;
          $this->reason = $absence->reason;
          $this->startperiod = $absence->startperiod;
          $this->endperiod = $absence->endperiod;
          return 1;
       } else {
          return 0;
       }
    }

    public function integrate($lesson) {
       if($this->lessonid == $lesson->lessonid &&
          //$this->teacher  == $lesson->teacher  &&
          $this->subject  == $lesson->subject  &&
          $this->room     == $lesson->room     &&
          $this->text     == $lesson->text) {
          if ($this->class != $lesson->class) {
             $class1parts = explode("/", $this->class);
             $class2parts = explode("/", $lesson->class);
             if (count($class1parts)>1 && count($class2parts)==2) {
                 $this->class .= "/".$class2parts[1];
             } else
                 $this->class .= $lesson->class;
          }
          if ($this->teacher != $lesson->teacher) {
             $this->teacher .= "/".$lesson->teacher;
          }
          return true;
       } else 
          return false;
    }
}