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Checks if a student is eligible to take a course.
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<?php | |
/** | |
* CourseEnrollmentEligibility | |
*/ | |
class CourseEnrollmentEligibility extends ModelService { | |
/** | |
* student | |
* @var \DeltaX\Models\Student | |
*/ | |
protected $student; | |
/** | |
* curriculumItem | |
* @var \DeltaX\Models\Curriculum | |
*/ | |
protected $curriculumItem; | |
/** | |
* yearStanding | |
* @var int | |
*/ | |
protected $yearStanding; | |
/** | |
* term | |
* @var int | |
*/ | |
protected $term; | |
/** | |
* setStudent | |
* @param string $code | |
* @return self | |
*/ | |
public function setTerm(string $code) { | |
$term = $this->repoInvoker->find('school_calendar', $code); | |
if (empty($student)){ | |
throw new InvalidTermException; | |
} | |
$this->term = $term; | |
return $this; | |
} | |
/** | |
* setStudent | |
* @param string $studentNumber | |
* @return self | |
*/ | |
public function setStudent(string $studentNumber) { | |
$student = $this->repoInvoker->find('student', $studentNumber); | |
if (empty($student)){ | |
throw new InvalidStudentNumberException; | |
} | |
$this->student = $student; | |
return $this; | |
} | |
public function setCurriculumItem(string $code){ | |
$degree_id = $this->student->degree_id; | |
$this->curriculumItem = $this->repoInvoker->entity('curricula', function() use ($code){ | |
return $entity->with('curriculum_term', 'course') | |
->whereHas('course', function($entity) use ($code){ | |
$entity->where('code', $code); | |
})); | |
})->where([['degree_id', $degree_id]]) | |
->get() | |
->first(); | |
return $this; | |
} | |
/** | |
* determineYearStandingPrerequisite | |
* @return self | |
*/ | |
protected function determineYearStandingPrerequisite() { | |
$yearLevel = $this->repoInvoker->entity('term_attendance') | |
->where([['student_id', $this->student->id]]) | |
->max('year_level'); | |
$yearLevel = $this->curriculumItem->curriculum_term->year_level; | |
if ($this->yearStanding > $yearLevel) { | |
return [ | |
'available' => false, | |
'message' => 'Year level is not enough' | |
'year_standing' => $yearLevel, | |
'required' => $requiredYearLevel | |
]; | |
} | |
return $this; | |
} | |
protected function determinePastEnrollment(){ | |
$prerequisiteItems = $this->determinePrerequisites(); | |
$pastEnrollment = $this->repoInvoker->entity('curricula', function($entity) use ($prerequisiteItems){ | |
return $entity | |
->select([ | |
'curricula.id' | |
'courses.code AS course_code', | |
'curricula.is_major', | |
'courses.name', | |
'courses.credits_in_lecture', | |
'courses.credits_in_lab', | |
'curricula.lec_contact_hrs', | |
'curricula.lab_contact_hrs', | |
'curriculum_terms.year_level', | |
'courses.code AS dependent_course', | |
'enrolled_courses.final_grade', | |
'remarks.remark', | |
])->join('courses', 'curricula.course_id', '=', 'courses.id') | |
->leftJoin('enrolled_courses', 'enrolled_courses.curriculum_id', '=', 'curricula.id') | |
->join('remarks', 'enrolled_courses.remark_id', '=', 'remarks.id') | |
->leftJoin('term_attendance', 'enrolled_courses.term_attendance_id', '=', 'term_attendance.id') | |
->leftJoin('school_calendar', 'term_attendance.school_calendar_id', '=', 'school_calendar.id') | |
->whereIn('curricula.id', $prerequisiteItems->pluck('id')); | |
})->where([ | |
['curricula.id', $this->curriculumItem->id], | |
['enrolled_courses.student_id', $this->student->id] | |
], true) | |
->get(); | |
return $pastEnrollment; | |
} | |
protected function determinePrerequisites(){ | |
return $this->repoInvoker->entity('curricula', function($entity){ | |
return $entity | |
->select([ | |
'prerequisites.id', | |
'prerequisites.course_id', | |
'prerequisite_courses.code', | |
'prerequisite_courses.name', | |
'prerequisite_courses.credits_in_lecture', | |
'prerequisite_courses.credits_in_lab', | |
'prerequisites.is_major', | |
'prerequisites.is_nth_year_standing', | |
'prerequisites.lec_contact_hrs', | |
'prerequisites.lab_contact_hrs' | |
])->join('courses', 'curricula.course_id', '=', 'courses.id') | |
->leftJoin('curriculum_prerequisites', 'curriculum_prerequisites.dependent_id', '=', 'curricula.id') | |
->leftJoin('curricula AS prerequisites', 'curriculum_prerequisites.prerequisite_id', '=', 'prerequisites.id') | |
->leftJoin('courses AS prerequisite_courses', 'prerequisites.course_id', '=', 'prerequisite_courses.id') | |
})->where([['curricla.id', $this->curriculumItem->id]])->get(); | |
} | |
public function checkOpenSessions(){ | |
$openSessions = $this->repoInvoker->entity('course_sessions', function($entity){ | |
return $entity | |
->select([ | |
'course_sessions.session_alias', | |
'courses.code' | |
]) | |
->join('courses', 'course_sessions.course_id', '=', 'courses.id') | |
->join('school_calendar', 'course_sessions.school_calendar_id', '=', 'courses.id') | |
})->where([ | |
['course_sessions.course_id', $this->curriculumItem->course_id], | |
['course_sessions.school_calendar_id', $this->term->id] | |
])->get(); | |
if(empty($openSessions)){ | |
return [ | |
'available' => false, | |
'message' => 'No available classes for this term' | |
]; | |
} | |
} | |
/** | |
* checkEligibility | |
* @return array | |
*/ | |
public function checkEligibility() { | |
//Does the item require class standing? | |
if ($this->curriculumItem['is_nth_year_standing']) { | |
$yearStanding = $this->determineYearStandingPrerequisite(); | |
if ( ! $yearStanding['available'] ){ | |
return $yearStanding; | |
} | |
} | |
$openSessions = $this->checkOpenSessions(); | |
//Are there any open sessions? | |
if ( ! $openSessions['available'] ) { | |
return $openSessions; | |
} | |
$prerequisiteItems = $this->determinePrerequisites(); | |
$pastEnrollment = $this->determinePastEnrollment(); | |
$prerequisiteItemsCount = $prerequisiteItems->groupBy('id')->count(); | |
$pastEnrollmentCount = $prerequisiteItems | |
->groupBy('id')->whereIn('remark', ['PASSED','F','S','VS','O'])->count(); | |
//Count all the prerequisite items and the ones the student have passed. | |
$result = [ | |
'prerequisites' => $prerequisiteItems, | |
'courses_taken' => $pastEnrollment, | |
'count_of_prerequisite_courses' => $prerequisiteItemsCount, | |
'count_of_passed_prerequisites' => $pastEnrollmentCount, | |
'availability' => $pastEnrollmentCount >= $prerequisiteItemsCount | |
]; | |
} |
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