private $course;

private $type;

private $group;

private $time;

private $venue;

private $remark;

private $summary;

private $description;

private $wkRepeatValid;

public function __construct(array $lesson) {

$this->course = array_key_exists('course', $lesson) ? $this->setCourse($lesson['course']) : null;

$this->type = array_key_exists('type', $lesson) ? strtoupper($lesson['type']) : '';

$this->group = array_key_exists('group', $lesson) ? strtoupper($lesson['group']) : '';

$this->time = array_key_exists('time', $lesson) ? (is_array($lesson['time']) ? new LessonTime($lesson['time']) : $lesson['time']) : null;

$this->venue = array_key_exists('venue', $lesson) ? strtoupper($lesson['venue']) : '';

$this->remark = array_key_exists('remark', $lesson) ? $lesson['remark'] : 'Invalid';

$this->wkRepeatValid = $this->setWkRepeat();

}//__construct(array $lesson);

public function __get($property_name) {

return isset($this->$property_name) ? $this->$property_name : null;

}//function __get($property_name);

public function setCourse(Course $course) {

$this->course = $course;

if(!$this->wkRepeatValid)

$course->addErrorFlag();

$this->summary = $course->code.' '.$this->type;

if(!$this->wkRepeatValid)

$summary .= ' *Warning!';

$this->description = $course->code.' '.$course->name.' '.$course->au.'\n';

$this->description .= $this->group!='' ? 'Group: '.$this->group.' ' : '';

$this->description .= $this->remark!='' ? 'Remark: '.$this->remark.' ' : '';

$this->description .= $this->wkRepeatValid ? '' : '\nWarning: Course Cal cannot get the repeat information. Please edit by yourself.';

}//function setCourse(Course $course);

private function setWkRepeat() {

$re = strtolower($this->remark);

if($re=='') {

for($i=0;$i<13;$i++)

$this->time->setWkRepeatTrueforThisWk($i);

return TRUE;

}//if remark is null, repeat every week.

$re1 = preg_replace('/wk/', '', $re);

$re2 = preg_replace('/\s/', '', $re1);

$wks = explode(',', $re2);

foreach($wks as $wk) {

$wkTime = explode('-', $wk);

if(count($wkTime)==2) {

for($i=$wkTime[0]-1;$i<$wkTime[1];$i++)

$this->time->setWkRepeatTrueforThisWk($i);

}//if remark looks like wk1-3,2-5.

else if(is_numeric($wk)) {

$this->time->setWkRepeatTrueforThisWk($wk-1);

}//if remark looks like wk1,2,3

else{

$this->time->setWkRepeatTrueforThisWk(0);

return FALSE;

}//cannot get week repeat information

}

return TRUE;

}//function setWkRepeat();

public function toString(){

$string = 'Lesson, ';

$string .= '<b>Type:</b> '.$this->type.' ';

$string .= '<b>Group:</b> '.$this->group.' ';

$string .= '<b>Venue:</b> '.$this->venue.' ';

$string .= '<b>Remark:</b> '.$this->remark.' ';

$string .= '<b>Summary:</b> '.$this->summary.' ';

$string .= '<b>Description:</b> '.$this->description.' ';

if($this->wkRepeatValid) {

$string .= '<b>Time:</b> '.$this->time->toString().' ';

}

else {

$string .= '<b>Warning!</b> This lesson\'s wkRepeat info cannot be caught. Only set Wk1.';

}

return $string;

}//function toString();

private $code;

private $index;

private $name;

private $au;

private $examTime;

private $lessons;

private $errorFlag;

private function __construct(array $course) {

$this->code = strtoupper($course['code']);

$this->index = $course['index'];

$this->name = ucwords($course['name']);

$this->au = $course['au'];

$this->examTime = $course['examTime'];

$this->lessons = array();

foreach($course['lessons'] as $l) {

if(is_array($l))

$this->addNewLesson($l);

else

$this->addLesson($l);

}

$this->errorFlag = 0;

}//function __construct(array $course);

private function addLesson(Lesson $lesson) {

array_push($this->lessons, $lesson);

$lesson->setCourse($this);

}//function addLesson(Lesson $lesson);

private function addNewLesson(array $lesson) {

$l = new Lesson($lesson);

if($l) {

array_push($this->lessons, $l);

$l->setCourse($this);

}

}//function addLesson(array $lesson);

public function __get($property_name) {

return isset($this->$property_name) ? $this->$property_name : null;

}//function __get($property_name);

public function addErrorFlag() {

$this->errorFlag++;

}//function addErrorFlag();

public static function getInstanceWithCourseInfo(array $course) {

if(!array_key_exists('code', $course))

return null;

$c = array('code' => $course['code']

, 'index' => array_key_exists('index', $course) ? $course['index'] : 0

, 'name' => array_key_exists('name', $course) ? $course['name'] : ''

, 'au' => array_key_exists('au', $course) ? $course['au'] : '0 au'

, 'examTime' => array_key_exists('examTime', $course) ? (is_array($course['examTime']) ? new EventTime($course['examTime']) : $course['examTime']) : null

, 'lessons' => array_key_exists('lessons', $course) ? $course['lessons'] : array());

return new Course($c);

}//function getInstanceWithCourseInfo(array $course);

public static function getInstanceAuto(array $course) {

if(!array_key_exists('code', $course) || !array_key_exists('index', $course) || !array_key_exists('year', $course) || !array_key_exists('sem', $course))

return null;

$code = $course['code'];

$code = strtoupper($code);

$index = $course['index'];

$examTime = array_key_exists('examTime', $course) ? $course['examTime'] : null;

$info = array('year' => $course['year']

, 'sem' => $course['sem']);

if(!array_key_exists('year', $info) || !array_key_exists('sem', $info))

return null;

$html = str_get_html(fetch(courseURL($code, $info)));

if(!$html)

return null;

$table = $html->find('table');

if(!$table)

return null;

//get course information

$tr = str_get_html($table[0])->find('tr');

$InfoBlock = str_get_html($tr[0]);

$nameAndAuBlock = $InfoBlock->find('b');

$courseName = $nameAndAuBlock[1]->plaintext;

$courseAU = $nameAndAuBlock[2]->plaintext;

//get index block

$indexBlock = null;

$line = -1;

$trBlocks = str_get_html($table[1])->find('tr');

for($i=0;$i<count($trBlocks);$i++) {

$cols = str_get_html ($trBlocks[$i])->find('b');

for($j=0;$j<count($cols);$j++)

if($index==$cols[0]->plaintext) {

$indexBlock = $trBlocks[$i];

$line = $i;

break;

}

if($line!=-1)

break;

}

if($line==-1)

return null;

//create a course instance

$c = array('code' => $code

, 'index' => $index

, 'name' => $courseName

, 'au' => $courseAU

, 'examTime' => $examTime

, 'lessons' => array());

$trs = array();

array_push($trs, $trBlocks[$line]);

$line++;

while(TRUE) {

if($line>=count($trBlocks))

break;

$cols = str_get_html($trBlocks[$line])->find('b');

$first = $cols[0]->plaintext;

if($first!='')

break;

array_push($trs, $trBlocks[$line]);

$line++;

}

foreach ($trs as $value) {

$lessonInfo = str_get_html($value)->find('b');

if(!$lessonInfo)

return null;

$times = explode('-',$lessonInfo[4]->plaintext);

if(!$times)

return null;

$lesson = new Lesson(array('type' => $lessonInfo[1]->plaintext

, 'group' => $lessonInfo[2]->plaintext

, 'time' => new LessonTime(array('wkDay' => $lessonInfo[3]->plaintext

, 'startTime' => intval($times[0])

, 'endTime' => intval($times[1])))

, 'venue' => $lessonInfo[5]->plaintext

, 'remark' => $lessonInfo[6]->plaintext));

array_push($c['lessons'], $lesson);

}

return Course::getInstanceWithCourseInfo($c);

}//function getInstanceWithCodeIndexAndInfo($code, $index, array $info);

public function toString(){

$string = 'Course, ';

$string .= $this->name.' ';

$string .= 'Code: '.$this->code.' ';

$string .= 'Index: '.$this->index.' ';

$string .= 'AU: '.$this->au.' ';

$string .= $this->examTime ? $this->examTime->toString() : 'No exam time ';

$string .= 'Lessons: </br>';

foreach($this->lessons as $lesson)

$string .= $lesson->toString();

return $string;

}//function toString();