Add Sheet upload function

src/Service/QuizSpreadsheetService.php

@@ -0,0 +1,123 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\Answer;
+use App\Entity\Question;
+use App\Entity\Quiz;
+use App\Exception\SpreadsheetDataException;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
+use Symfony\Component\HttpFoundation\File\File;
+
+class QuizSpreadsheetService
+{
+    public function generateTemplate(bool $fillExample = true): \Closure
+    {
+        $spreadsheet = new Spreadsheet();
+
+        $sheet = $spreadsheet->getActiveSheet();
+
+        $sheet->getStyle('1:1')->getFont()->setBold(true);
+
+        $sheet->setCellValue('A1', 'Question');
+        $sheet->getColumnDimension('A')->setWidth(30);
+        $sheet->getStyle('A:A')->getAlignment()->setWrapText(true);
+
+        $counter = 1;
+        foreach (range('B', 'L', 2) as $column) {
+            $sheet->setCellValue($column.'1', 'Answer '.$counter++);
+            $sheet->getColumnDimension($column)->setWidth(30);
+            $sheet->getStyle($column.':'.$column)->getAlignment()->setWrapText(true);
+        }
+
+        foreach (range('C', 'M', 2) as $column) {
+            $sheet->setCellValue($column.'1', 'Correct');
+            $sheet->getColumnDimension($column)->setAutoSize(true);
+        }
+
+        if ($fillExample) {
+            $sheet->setCellValue('B2', 'Man');
+            $sheet->setCellValue('C2', true);
+
+            $sheet->setCellValue('D2', 'Vrouw');
+            $sheet->setCellValue('E2', false);
+
+            $sheet->setCellValue('A2', 'Is de mol een man of een vrouw?');
+        }
+
+        return $this->toXlsx($spreadsheet);
+    }
+
+    /** @throws SpreadsheetDataException */
+    public function xlsxToQuiz(Quiz $quiz, File $file): Quiz
+    {
+        $spreadsheet = $this->readSheet($file);
+        $sheet = $spreadsheet->getSheet($spreadsheet->getFirstSheetIndex());
+
+        $answerLines = \array_slice($sheet->toArray(formatData: false), 1);
+
+        return $this->fillQuizFromArray($quiz, $answerLines);
+    }
+
+    private function readSheet(File $file): Spreadsheet
+    {
+        return (new \PhpOffice\PhpSpreadsheet\Reader\Xlsx())->setReadDataOnly(true)->load($file->getRealPath());
+    }
+
+    /**
+     * @param array<int, array<int, string|bool|null>> $sheet
+     *
+     * @throws SpreadsheetDataException
+     */
+    private function fillQuizFromArray(Quiz $quiz, array $sheet): Quiz
+    {
+        $errors = [];
+
+        $questionCounter = 1;
+        foreach ($sheet as $questionArr) {
+            if (null === $questionArr[0]) {
+                break;
+            }
+
+            $question = new Question();
+            $question->setQuestion((string) $questionArr[0]);
+            $question->setOrdering($questionCounter++);
+
+            $answerCounter = 1;
+            $arrCounter = 1;
+
+            while (true) {
+                if (null === $questionArr[$arrCounter]) {
+                    if (1 === $answerCounter) {
+                        $errors[] = \sprintf('Question %d has no answers', $answerCounter);
+                    }
+                    break;
+                }
+
+                $answer = new Answer((string) $questionArr[$arrCounter++], (bool) $questionArr[$arrCounter++]);
+                $answer->setOrdering($answerCounter++);
+                $question->addAnswer($answer);
+            }
+
+            $quiz->addQuestion($question);
+        }
+
+        if ([] !== $errors) {
+            throw new SpreadsheetDataException($errors);
+        }
+
+        return $quiz;
+    }
+
+    public function quizToXlsx(Quiz $quiz): void {}
+
+    private function toXlsx(Spreadsheet $spreadsheet): \Closure
+    {
+        $writer = new Xlsx($spreadsheet);
+
+        return static fn () => $writer->save('php://output');
+    }
+}