feat: exif medium tests (#23561)

server/src/services/metadata.service.ts

@@ -2,7 +2,7 @@ import { Injectable } from '@nestjs/common';
 import { ContainerDirectoryItem, ExifDateTime, Tags } from 'exiftool-vendored';
 import { Insertable } from 'kysely';
 import _ from 'lodash';
-import { Duration } from 'luxon';
+import { DateTime, Duration } from 'luxon';
 import { Stats } from 'node:fs';
 import { constants } from 'node:fs/promises';
 import { join, parse } from 'node:path';
@@ -866,31 +866,40 @@ export class MetadataService extends BaseService {
       this.logger.debug(`No timezone information found for asset ${asset.id}: ${asset.originalPath}`);
     }
 
-    let dateTimeOriginal = dateTime?.toDate();
-    let localDateTime = dateTime?.toDateTime().setZone('UTC', { keepLocalTime: true }).toJSDate();
+    let dateTimeOriginal = dateTime?.toDateTime();
+
+    // do not let JavaScript use local timezone
+    if (dateTimeOriginal && !dateTime?.hasZone) {
+      dateTimeOriginal = dateTimeOriginal.setZone('UTC', { keepLocalTime: true });
+    }
+
+    // align with whatever timeZone we chose
+    dateTimeOriginal = dateTimeOriginal?.setZone(timeZone ?? 'UTC');
+
+    // store as "local time"
+    let localDateTime = dateTimeOriginal?.setZone('UTC', { keepLocalTime: true });
+
     if (!localDateTime || !dateTimeOriginal) {
       // FileCreateDate is not available on linux, likely because exiftool hasn't integrated the statx syscall yet
       // birthtime is not available in Docker on macOS, so it appears as 0
-      const earliestDate = new Date(
+      const earliestDate = DateTime.fromMillis(
         Math.min(
           asset.fileCreatedAt.getTime(),
           stats.birthtimeMs ? Math.min(stats.mtimeMs, stats.birthtimeMs) : stats.mtime.getTime(),
         ),
       );
       this.logger.debug(
-        `No exif date time found, falling back on ${earliestDate.toISOString()}, earliest of file creation and modification for asset ${asset.id}: ${asset.originalPath}`,
+        `No exif date time found, falling back on ${earliestDate.toISO()}, earliest of file creation and modification for asset ${asset.id}: ${asset.originalPath}`,
       );
       dateTimeOriginal = localDateTime = earliestDate;
     }
 
-    this.logger.verbose(
-      `Found local date time ${localDateTime.toISOString()} for asset ${asset.id}: ${asset.originalPath}`,
-    );
+    this.logger.verbose(`Found local date time ${localDateTime.toISO()} for asset ${asset.id}: ${asset.originalPath}`);
 
     return {
-      dateTimeOriginal,
       timeZone,
-      localDateTime,
+      localDateTime: localDateTime.toJSDate(),
+      dateTimeOriginal: dateTimeOriginal.toJSDate(),
     };
   }