Revert "Don't set the empty string as we display it on the scoreboard"

This reverts commit 9974cec.

A better fix was applied in: #2567, the values is now properly validated
and we fail if the property is not set. Added another case for this
specific case of an empty name.

Author: vmcj

webapp/src/Service/ImportExportService.php

@@ -984,8 +984,8 @@ public function importTeamsJson(array $data, ?string &$message = null, ?array &$
                     'icpcid' => $team['icpc_id'] ?? null,
                     'label' => $team['label'] ?? null,
                     'categoryid' => $team['group_ids'][0] ?? null,
-                    'name' => $team['name'] ?? null,
-                    'display_name' => $team['display_name'] ?? null,
+                    'name' => $team['name'] ?? '',
+                    'display_name' => $team['display_name'] ?? '',
                     'publicdescription' => $team['public_description'] ?? $team['members'] ?? '',
                     'location' => $team['location']['description'] ?? null,
                 ],

webapp/tests/Unit/Service/ImportExportServiceTest.php

@@ -858,6 +858,44 @@ public function testImportTeamsJsonError(): void
         self::assertEquals($preCount, $postCount);
     }
 
+    public function testImportTeamsJsonErrorEmptyString(): void
+    {
+        $teamsData = <<<EOF
+[{
+    "id": "11",
+    "icpc_id": "447047",
+    "label": "team1",
+    "name": "",
+    "group_ids": ["24"],
+    "organization_id": "INST-42",
+    "location": {"description": "AUD 10"}
+}, {
+    "id": "12",
+    "icpc_id": "447837",
+    "group_ids": ["25"],
+    "name": "Pleading not FAUlty",
+    "organization_id": "INST-43"
+}]
+EOF;
+        $em = static::getContainer()->get(EntityManagerInterface::class);
+        $preCount = $em->getRepository(Team::class)->count([]);
+
+        $fileName = tempnam(static::getContainer()->get(DOMJudgeService::class)->getDomjudgeTmpDir(), 'teams-json');
+        file_put_contents($fileName, $teamsData);
+        $file = new UploadedFile($fileName, 'teams.json');
+        /** @var ImportExportService $importExportService */
+        $importExportService = static::getContainer()->get(ImportExportService::class);
+        $importCount = $importExportService->importJson('teams', $file, $message);
+        // Remove the file, we don't need it anymore.
+        unlink($fileName);
+
+        self::assertMatchesRegularExpression('/name: This value should not be blank./', $message);
+        self::assertEquals(0, $importCount);
+
+        $postCount = $em->getRepository(Team::class)->count([]);
+        self::assertEquals($preCount, $postCount);
+    }
+
     public function testImportGroupsTsv(): void
     {
         // Example from the manual