refactor: exif entity (#16621)

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/infrastructure/utils/exif.converter.dart

@@ -0,0 +1,56 @@
+import 'package:immich_mobile/domain/models/exif.model.dart';
+import 'package:openapi/api.dart';
+
+abstract final class ExifDtoConverter {
+  static ExifInfo fromDto(ExifResponseDto dto) {
+    return ExifInfo(
+      fileSize: dto.fileSizeInByte,
+      description: dto.description,
+      orientation: dto.orientation,
+      timeZone: dto.timeZone,
+      dateTimeOriginal: dto.dateTimeOriginal,
+      isFlipped: _isOrientationFlipped(dto.orientation),
+      latitude: dto.latitude?.toDouble(),
+      longitude: dto.longitude?.toDouble(),
+      city: dto.city,
+      state: dto.state,
+      country: dto.country,
+      make: dto.make,
+      model: dto.model,
+      lens: dto.lensModel,
+      f: dto.fNumber?.toDouble(),
+      mm: dto.focalLength?.toDouble(),
+      iso: dto.iso?.toInt(),
+      exposureSeconds: _exposureTimeToSeconds(dto.exposureTime),
+    );
+  }
+
+  static bool _isOrientationFlipped(String? orientation) {
+    final value = orientation == null ? null : int.tryParse(orientation);
+    if (value == null) {
+      return false;
+    }
+    final isRotated90CW = value == 5 || value == 6 || value == 90;
+    final isRotated270CW = value == 7 || value == 8 || value == -90;
+    return isRotated90CW || isRotated270CW;
+  }
+
+  static double? _exposureTimeToSeconds(String? s) {
+    if (s == null) {
+      return null;
+    }
+    double? value = double.tryParse(s);
+    if (value != null) {
+      return value;
+    }
+    final parts = s.split("/");
+    if (parts.length == 2) {
+      final numerator = double.tryParse(parts.firstOrNull ?? "-");
+      final denominator = double.tryParse(parts.lastOrNull ?? "-");
+      if (numerator != null && denominator != null) {
+        return numerator / denominator;
+      }
+    }
+    return null;
+  }
+}