feat: exif medium tests (#23561)

server/src/services/metadata.service.spec.ts

@@ -1,4 +1,5 @@
 import { BinaryField, ExifDateTime } from 'exiftool-vendored';
+import { DateTime } from 'luxon';
 import { randomBytes } from 'node:crypto';
 import { Stats } from 'node:fs';
 import { defaults } from 'src/config';
@@ -231,7 +232,7 @@ describe(MetadataService.name, () => {
       });
     });
 
-    it('should account for the server being in a non-UTC timezone', async () => {
+    it('should determine dateTimeOriginal regardless of the server time zone', async () => {
       process.env.TZ = 'America/Los_Angeles';
       mocks.assetJob.getForMetadataExtraction.mockResolvedValue(assetStub.sidecar);
       mockReadTags({ DateTimeOriginal: '2022:01:01 00:00:00' });
@@ -239,7 +240,7 @@ describe(MetadataService.name, () => {
       await sut.handleMetadataExtraction({ id: assetStub.image.id });
       expect(mocks.asset.upsertExif).toHaveBeenCalledWith(
         expect.objectContaining({
-          dateTimeOriginal: new Date('2022-01-01T08:00:00.000Z'),
+          dateTimeOriginal: new Date('2022-01-01T00:00:00.000Z'),
         }),
       );
 
@@ -856,6 +857,7 @@ describe(MetadataService.name, () => {
         tz: 'UTC-11:30',
         Rating: 3,
       };
+
       mocks.assetJob.getForMetadataExtraction.mockResolvedValue(assetStub.image);
       mockReadTags(tags);
 
@@ -897,7 +899,7 @@ describe(MetadataService.name, () => {
           id: assetStub.image.id,
           duration: null,
           fileCreatedAt: dateForTest,
-          localDateTime: dateForTest,
+          localDateTime: DateTime.fromISO('1970-01-01T00:00:00.000Z').toJSDate(),
         }),
       );
     });
@@ -1595,7 +1597,7 @@ describe(MetadataService.name, () => {
 
       const result = firstDateTime(tags);
       expect(result?.tag).toBe('SonyDateTime2');
-      expect(result?.dateTime?.toDate()?.toISOString()).toBe('2023-07-07T07:00:00.000Z');
+      expect(result?.dateTime?.toISOString()).toBe('2023-07-07T07:00:00');
     });
 
     it('should respect full priority order with all date tags present', () => {
@@ -1624,7 +1626,7 @@ describe(MetadataService.name, () => {
       const result = firstDateTime(tags);
       // Should use SubSecDateTimeOriginal as it has highest priority
       expect(result?.tag).toBe('SubSecDateTimeOriginal');
-      expect(result?.dateTime?.toDate()?.toISOString()).toBe('2023-01-01T01:00:00.000Z');
+      expect(result?.dateTime?.toISOString()).toBe('2023-01-01T01:00:00');
     });
 
     it('should handle missing SubSec tags and use available date tags', () => {
@@ -1644,7 +1646,7 @@ describe(MetadataService.name, () => {
       const result = firstDateTime(tags);
       // Should use CreationDate when available
       expect(result?.tag).toBe('CreationDate');
-      expect(result?.dateTime?.toDate()?.toISOString()).toBe('2023-07-07T07:00:00.000Z');
+      expect(result?.dateTime?.toISOString()).toBe('2023-07-07T07:00:00');
     });
 
     it('should handle invalid date formats gracefully', () => {
@@ -1658,7 +1660,7 @@ describe(MetadataService.name, () => {
       const result = firstDateTime(tags);
       // Should skip invalid dates and use the first valid one
       expect(result?.tag).toBe('GPSDateTime');
-      expect(result?.dateTime?.toDate()?.toISOString()).toBe('2023-10-10T10:00:00.000Z');
+      expect(result?.dateTime?.toISOString()).toBe('2023-10-10T10:00:00');
     });
 
     it('should prefer CreationDate over CreateDate', () => {

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(),
     };
   }