|null */ public static function fileFieldRow(?Competition $competition, string $fieldKey): ?array { if ($competition === null) { return null; } $competition->loadMissing('formSchema'); $rows = $competition->formSchema?->schema_json; if (! is_array($rows)) { return null; } foreach ($rows as $row) { if (! is_array($row)) { continue; } if (($row['key'] ?? '') === $fieldKey && ($row['type'] ?? '') === 'file') { return $row; } } return null; } /** * 有效扩展名：未配置 file_extensions 时用全局白名单；配置时与全局白名单求交集。 * * @param array|null $row * @return list */ public static function effectiveAllowedExtensions(?array $row): array { /** @var list $global */ $global = array_values(array_unique(array_filter(array_map( static fn ($x) => strtolower(ltrim(trim((string) $x), '.')), config('contest.file_mimes', []) ?: [], )))); $globIndex = []; foreach ($global as $g) { $globIndex[$g] = true; } $exts = is_array($row) ? ($row['file_extensions'] ?? null) : null; if (! is_array($exts) || count($exts) === 0) { return $global; } $out = []; foreach ($exts as $e) { $s = strtolower(ltrim(trim((string) $e), '.')); if ($s !== '' && isset($globIndex[$s])) { $out[] = $s; } } $out = array_values(array_unique($out)); return count($out) > 0 ? $out : $global; } /** * @param array|null $row */ public static function maxCount(?array $row): ?int { if (! is_array($row) || ! array_key_exists('file_max_count', $row)) { return null; } $n = $row['file_max_count']; if ($n === null || $n === '') { return null; } $i = (int) $n; return $i >= 1 ? $i : null; } }