feat: add date_taken field to media model and update related functionalities

libertas_worker/src/plugins/exif_reader.rs

@@ -1,4 +1,5 @@
 use async_trait::async_trait;
+use chrono::{DateTime, NaiveDateTime, Utc};
 use std::path::PathBuf;
 
 use libertas_core::{
@@ -59,15 +60,20 @@ impl MediaProcessorPlugin for ExifReaderPlugin {
             .and_then(|f| f.as_u32())
             .map(|v| v as i32);
 
-        if width.is_some() || height.is_some() || location.is_some() {
+        let date_taken = exif
+            .get(ExifTag::DateTimeOriginal)
+            .and_then(|f| f.as_str())
+            .and_then(parse_exif_datetime);
+
+        if width.is_some() || height.is_some() || location.is_some() || date_taken.is_some() {
             context
                 .media_repo
-                .update_metadata(media.id, width, height, location.clone())
+                .update_metadata(media.id, width, height, location.clone(), date_taken)
                 .await?;
 
             let message = format!(
-                "Extracted EXIF: width={:?}, height={:?}, location={:?}",
-                width, height, location
+                "Extracted EXIF: width={:?}, height={:?}, location={:?}, date_taken={:?}",
+                width, height, location, date_taken
             );
             Ok(PluginData { message })
         } else {
@@ -77,3 +83,10 @@ impl MediaProcessorPlugin for ExifReaderPlugin {
         }
     }
 }
+
+fn parse_exif_datetime(s: &str) -> Option<DateTime<Utc>> {
+    // EXIF datetime format is 'YYYY:MM:DD HH:MM:SS'
+    NaiveDateTime::parse_from_str(s, "%Y:%m:%d %H:%M:%S")
+        .ok()
+        .map(|ndt| ndt.and_local_timezone(Utc).unwrap())
+}

libertas_worker/src/plugins/xmp_writer.rs

@@ -7,7 +7,7 @@ use libertas_core::{
     plugins::{MediaProcessorPlugin, PluginContext, PluginData},
 };
 use tokio::fs;
-use xmp_toolkit::XmpMeta;
+use xmp_toolkit::{XmpMeta, XmpValue};
 
 pub struct XmpWriterPlugin;
 
@@ -39,6 +39,18 @@ impl MediaProcessorPlugin for XmpWriterPlugin {
             CoreError::Unknown(format!("Failed to set description property in XMP: {}", e))
         })?;
 
+        if let Some(date_taken) = &fresh_media.date_taken {
+            let date_str = date_taken.to_rfc3339();
+            xmp.set_property(
+                "http://ns.adobe.com/exif/1.0/",
+                "DateTimeOriginal",
+                &XmpValue::from(date_str),
+            )
+            .map_err(|e| {
+                CoreError::Unknown(format!("Failed to set DateTimeOriginal in XMP: {}", e))
+            })?;
+        }
+
         if let Some(_location) = &fresh_media.extracted_location {
             // TODO: Set location properties in XMP
         }