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<?php |
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namespace App\Judite\Models; |
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use Illuminate\Database\Eloquent\Model; |
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use Laracasts\Presenter\PresentableTrait; |
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use App\Judite\Presenters\EnrollmentPresenter; |
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class Enrollment extends Model |
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{ |
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use PresentableTrait; |
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/** |
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* The relations to eager load on every query. |
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* |
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* @var array |
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*/ |
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protected $with = ['student', 'shift', 'course']; |
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/** |
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* The presenter for this entity. |
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* |
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* @var string |
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*/ |
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protected $presenter = EnrollmentPresenter::class; |
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/** |
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* Scope a query to filter enrollments by owner. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param \App\Judite\Models\Student $student |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeOwnedBy($query, Student $student) |
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{ |
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return $query->whereStudentId($student->id); |
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} |
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/** |
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* Scope a query to order enrollments by course. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeOrderByCourse($query) |
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{ |
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return $query->select('enrollments.*') |
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->join('courses', 'enrollments.course_id', '=', 'courses.id') |
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->orderBy('courses.year', 'asc') |
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->orderBy('courses.semester', 'asc') |
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->orderBy('courses.name', 'asc'); |
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} |
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/** |
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* Scope a query to filter similar enrollments. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param \App\Judite\Models\Enrollment $enrollment |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeSimilarEnrollments($query, Enrollment $enrollment) |
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{ |
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return $query->where('enrollments.id', '!=', $enrollment->id) |
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->where('course_id', $enrollment->course->id) |
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->where('shift_id', '!=', $enrollment->shift->id); |
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} |
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/** |
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* Scope a query to order enrollments by students. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeOrderByStudent($query) |
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{ |
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return $query->select('enrollments.*') |
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->join('students', 'enrollments.student_id', '=', 'students.id') |
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->orderBy('students.student_number', 'asc'); |
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} |
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/** |
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* Exchange shifts with the given enrollment. |
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* |
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* @param \App\Judite\Models\Enrollment $enrollment |
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* |
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* @return $this |
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*/ |
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public function exchange(Enrollment $enrollment): Enrollment |
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{ |
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$fromShiftId = $this->shift_id; |
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$this->shift()->associate($enrollment->shift_id); |
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$enrollment->shift()->associate($fromShiftId); |
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$this->save(); |
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$enrollment->save(); |
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return $this; |
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} |
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/** |
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* Get exchanges of this enrollment as source. |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\HasMany |
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*/ |
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public function exchangesAsSource() |
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{ |
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return $this->hasMany(Exchange::class, 'from_enrollment_id'); |
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} |
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/** |
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* Get student of this enrollment. |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsTo |
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*/ |
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public function student() |
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{ |
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return $this->belongsTo(Student::class); |
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} |
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/** |
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* Get course of this enrollment. |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsTo |
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*/ |
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public function course() |
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{ |
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return $this->belongsTo(Course::class); |
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} |
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/** |
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* Get shift of this enrollment. |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsTo |
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*/ |
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public function shift() |
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{ |
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return $this->belongsTo(Shift::class); |
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} |
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/** |
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* Check whether this enrollment is available for exchange. |
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* |
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* @return bool |
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*/ |
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public function availableForExchange() |
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{ |
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$isBeingExchanged = is_null($this->exchanges_as_source_count) |
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? $this->exchangesAsSource()->exists() |
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: $this->exchanges_as_source_count > 0; |
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return ! $isBeingExchanged && ! is_null($this->shift_id); |
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} |
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/** |
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* Check if a enrollment can be deleted. |
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* |
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* @return bool |
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*/ |
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public function isDeletable() |
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{ |
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return is_null($this->shift); |
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} |
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} |
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Hackathonners /
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