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<?php |
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namespace App\Http\Controllers\Admin; |
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use App\Judite\Models\Shift; |
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use App\Judite\Models\Course; |
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use App\Judite\Models\Student; |
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use App\Judite\Models\Enrollment; |
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use Illuminate\Support\Facades\DB; |
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use App\Http\Controllers\Controller; |
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use Maatwebsite\Excel\Facades\Excel; |
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use App\Exceptions\InvalidFieldValueException; |
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use App\Exceptions\InvalidImportFileException; |
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use App\Http\Requests\Enrollment\ImportRequest; |
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class EnrollmentController extends Controller |
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{ |
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/** |
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* Exports the list of students enrolled in each course. |
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* |
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* @return \Illuminate\Http\Response |
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*/ |
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public function export() |
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{ |
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// Get the list of students enrolled on each course |
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$enrollments = DB::transaction(function () { |
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$enrollments = Enrollment::with(['student', 'course']) |
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->get() |
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->sortByDesc('courses.name'); |
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return $enrollments; |
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}); |
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// Export to CSV |
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$result = Excel::create('enrollments', function ($excel) use ($enrollments) { |
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$excel->sheet('Enrollments', function ($sheet) use ($enrollments) { |
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$sheet->loadView('enrollments.export', compact('enrollments')); |
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}); |
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}); |
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return $result->export('csv'); |
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} |
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/** |
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* Store the enrollments imported in the request. |
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* |
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* @param \App\Http\Requests\Enrollment\ImportRequest $request |
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* |
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* @return \Illuminate\Http\RedirectResponse |
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*/ |
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public function storeImport(ImportRequest $request) |
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{ |
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try { |
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$file = $request->enrollments; |
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$path = $file->path(); |
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Excel::load($path, function ($reader) { |
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DB::transaction(function () use ($reader) { |
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// Loop for all the rows of the table |
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$reader->each(function ($row, $index) { |
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$index += 2; // Skip header |
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// Get the models of the given ids |
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// Check if the given student number exists |
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$student = Student::whereNumber($row->student_id)->first(); |
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if ($student === null) { |
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$exception = new InvalidFieldValueException(); |
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$exception->setField('Student ID', $row->student_id, "The student {$row->student_id} does not exist. (at line {$index})"); |
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throw $exception; |
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} |
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// Check if the given course id exists |
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$course = Course::find($row->course_id); |
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if ($course === null) { |
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$exception = new InvalidFieldValueException(); |
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$exception->setField('Course ID', $row->course_id, "The course {$row->course_id} does not exist. (at line {$index})"); |
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throw $exception; |
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} |
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// Check if the given shift tag exists in the associated course |
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if ($row->shift === null) { |
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$exception = new InvalidFieldValueException(); |
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$exception->setField('Shift', $row->shift, "The shift field is required on imported enrollments. (at line {$index})"); |
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throw $exception; |
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} |
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$shift = $course->getShiftByTag($row->shift); |
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if ($shift === null) { |
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$shift = Shift::make(['tag' => $row->shift]); |
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$course->addShift($shift); |
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} |
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// Check if the enrollment exists |
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$enrollment = Enrollment::where([ |
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'course_id' => $course->id, |
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'student_id' => $student->id, |
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])->first(); |
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if ($enrollment === null) { |
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$exception = new InvalidImportFileException("The student {$row->student_id} is not enrolled in course {$row->course_id}. (at line {$index})"); |
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throw $exception; |
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} |
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// Add the shift to the enrollment |
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$enrollment->shift()->associate($shift); |
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$enrollment->save(); |
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}); |
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}); |
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}); |
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flash('The enrollments file was successfully imported.')->success(); |
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} catch (InvalidImportFileException $e) { |
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flash($e->getMessage())->error(); |
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} |
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return redirect()->route('enrollments.import'); |
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} |
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/** |
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* Show the form for importing enrollments. |
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* |
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* @return \Illuminate\View\View |
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*/ |
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public function import() |
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{ |
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return view('enrollments.import'); |
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} |
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} |
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Hackathonners /
swap
