Add option to preserve export file timestamps from EXIF capture date

src-tauri/Cargo.toml

@@ -66,6 +66,7 @@ mozjpeg-rs = "0.9.0"
 webp = "0.3"
 jxl-oxide = { version = "0.12.5", features = ["image"] }
 jxl-encoder = "0.1.3"
+filetime = "0.2"
 libc = "0.2.183"
 rgb = "0.8.53"
 imgref = "1.12.0"

src-tauri/src/lib.rs

@@ -40,6 +40,7 @@ use std::sync::{Arc, Mutex};
 use std::time::Duration;
 
 use base64::{Engine as _, engine::general_purpose};
+use filetime;
 use image::codecs::jpeg::JpegEncoder;
 use image::{
     DynamicImage, GenericImageView, GrayImage, ImageBuffer, ImageFormat, Luma, Rgb, RgbImage, Rgba,
@@ -234,6 +235,8 @@ struct ExportSettings {
     jpeg_quality: u8,
     resize: Option<ResizeOptions>,
     keep_metadata: bool,
+    #[serde(default)]
+    preserve_timestamps: bool,
     strip_gps: bool,
     filename_template: Option<String>,
     watermark: Option<WatermarkSettings>,
@@ -1784,6 +1787,14 @@ fn process_image_for_export_pipeline(
     )
 }
 
+fn set_timestamps_from_exif(src: &Path, dst: &Path) {
+    let capture_dt = exif_processing::get_creation_date_from_path(src);
+    let ft = filetime::FileTime::from_unix_time(capture_dt.timestamp(), capture_dt.timestamp_subsec_nanos());
+    if let Err(e) = filetime::set_file_times(dst, ft, ft) {
+        log::warn!("Could not set timestamps on '{}': {}", dst.display(), e);
+    }
+}
+
 fn save_image_with_metadata(
     image: &DynamicImage,
     output_path: &std::path::Path,
@@ -2058,6 +2069,10 @@ fn export_masks_for_image(
                 export_settings,
             )?;
 
+            if export_settings.preserve_timestamps {
+                set_timestamps_from_exif(Path::new(source_path_str), &mask_image_path);
+            }
+
             let alpha_bytes = encode_grayscale_to_png(&alpha_resized)?;
             #[cfg(target_os = "android")]
             {
@@ -2207,6 +2222,10 @@ async fn export_image(
                 &export_settings,
             )?;
 
+            if export_settings.preserve_timestamps {
+                set_timestamps_from_exif(Path::new(&source_path_str), output_path_obj);
+            }
+
             if export_settings.export_masks {
                 export_masks_for_image(
                     &base_image,
@@ -2471,6 +2490,10 @@ async fn batch_export_images(
 
                         save_image_with_metadata(&final_image, &output_path, &source_path_str, &export_settings)?;
 
+                        if export_settings.preserve_timestamps {
+                            set_timestamps_from_exif(Path::new(&source_path_str), &output_path);
+                        }
+
                         if export_settings.export_masks {
                             export_masks_for_image(
                                 &base_image,

src/components/panel/right/ExportPanel.tsx

@@ -191,6 +191,8 @@ export default function ExportPanel({
     setDontEnlarge,
     keepMetadata,
     setKeepMetadata,
+    preserveTimestamps,
+    setPreserveTimestamps,
     stripGps,
     setStripGps,
     exportMasks,
@@ -334,6 +336,7 @@ export default function ExportPanel({
       filenameTemplate,
       jpegQuality,
       keepMetadata,
+      preserveTimestamps,
       resize: enableResize ? { mode: resizeMode, value: resizeValue, dontEnlarge } : null,
       stripGps,
       watermark:
@@ -361,6 +364,7 @@ export default function ExportPanel({
     resizeValue,
     dontEnlarge,
     keepMetadata,
+    preserveTimestamps,
     stripGps,
     filenameTemplate,
     enableWatermark,
@@ -408,6 +412,7 @@ export default function ExportPanel({
       filenameTemplate: finalFilenameTemplate,
       jpegQuality: jpegQuality,
       keepMetadata,
+      preserveTimestamps,
       resize: enableResize ? { mode: resizeMode, value: resizeValue, dontEnlarge } : null,
       stripGps,
       exportMasks: isEditorContext ? exportMasks : undefined,
@@ -639,6 +644,15 @@ export default function ExportPanel({
                   </>
                 )}
 
+                <Section title="File Timestamps">
+                  <Switch
+                    checked={preserveTimestamps}
+                    disabled={isExporting}
+                    label="Set File Timestamps from EXIF Capture Date"
+                    onChange={setPreserveTimestamps}
+                  />
+                </Section>
+
                 {isEditorContext && (
                   <Section title="Masks">
                     <Switch

src/components/panel/right/LibraryExportPanel.tsx

@@ -192,6 +192,8 @@ export default function LibraryExportPanel({
     setDontEnlarge,
     keepMetadata,
     setKeepMetadata,
+    preserveTimestamps,
+    setPreserveTimestamps,
     stripGps,
     setStripGps,
     exportMasks,
@@ -356,6 +358,7 @@ export default function LibraryExportPanel({
       filenameTemplate,
       jpegQuality,
       keepMetadata,
+      preserveTimestamps,
       resize: enableResize ? { mode: resizeMode, value: resizeValue, dontEnlarge } : null,
       stripGps,
       watermark:
@@ -384,6 +387,7 @@ export default function LibraryExportPanel({
     resizeValue,
     dontEnlarge,
     keepMetadata,
+    preserveTimestamps,
     stripGps,
     filenameTemplate,
     enableWatermark,
@@ -435,6 +439,7 @@ export default function LibraryExportPanel({
       filenameTemplate: finalFilenameTemplate,
       jpegQuality: jpegQuality,
       keepMetadata,
+      preserveTimestamps,
       resize: enableResize ? { mode: resizeMode, value: resizeValue, dontEnlarge } : null,
       stripGps,
       exportMasks,
@@ -634,6 +639,15 @@ export default function LibraryExportPanel({
                   </>
                 )}
 
+                <Section title="File Timestamps">
+                  <Switch
+                    checked={preserveTimestamps}
+                    disabled={isExporting}
+                    label="Set File Timestamps from EXIF Capture Date"
+                    onChange={setPreserveTimestamps}
+                  />
+                </Section>
+
                 <Section title="Masks">
                   <Switch
                     label="Export masks as separate files"

src/components/ui/ExportImportProperties.tsx

@@ -37,6 +37,7 @@ export interface ExportSettings {
   filenameTemplate: string | null;
   jpegQuality: number;
   keepMetadata: boolean;
+  preserveTimestamps: boolean;
   resize: {
     mode: string;
     value: number;
@@ -105,6 +106,7 @@ export interface ExportPreset {
   resizeValue: number;
   dontEnlarge: boolean;
   keepMetadata: boolean;
+  preserveTimestamps: boolean;
   stripGps: boolean;
   exportMasks?: boolean;
   filenameTemplate: string;

src/hooks/useExportSettings.ts

@@ -9,6 +9,7 @@ export function useExportSettings() {
   const [resizeValue, setResizeValue] = useState(2048);
   const [dontEnlarge, setDontEnlarge] = useState(true);
   const [keepMetadata, setKeepMetadata] = useState(true);
+  const [preserveTimestamps, setPreserveTimestamps] = useState(false);
   const [stripGps, setStripGps] = useState(true);
   const [exportMasks, setExportMasks] = useState(false);
   const [filenameTemplate, setFilenameTemplate] = useState('{original_filename}_edited');
@@ -27,6 +28,7 @@ export function useExportSettings() {
     setResizeValue(preset.resizeValue);
     setDontEnlarge(preset.dontEnlarge);
     setKeepMetadata(preset.keepMetadata);
+    setPreserveTimestamps(preset.preserveTimestamps ?? false);
     setStripGps(preset.stripGps);
     setExportMasks(preset.exportMasks ?? false);
     setFilenameTemplate(preset.filenameTemplate);
@@ -47,6 +49,7 @@ export function useExportSettings() {
       resizeValue,
       dontEnlarge,
       keepMetadata,
+      preserveTimestamps,
       stripGps,
       exportMasks,
       filenameTemplate,
@@ -65,6 +68,7 @@ export function useExportSettings() {
       resizeValue,
       dontEnlarge,
       keepMetadata,
+      preserveTimestamps,
       stripGps,
       exportMasks,
       filenameTemplate,
@@ -92,6 +96,8 @@ export function useExportSettings() {
     setDontEnlarge,
     keepMetadata,
     setKeepMetadata,
+    preserveTimestamps,
+    setPreserveTimestamps,
     stripGps,
     setStripGps,
     exportMasks,