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fix(server): prefer explicit timezone over GPS based guess

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exiftool-vendored sadly treats the offset +00:00 (used in several countries) as unknown
and may return a timezone which is based on GPS coordinates. Because of this, when
one manually fixes the timezone offset to +00:00, this fix is overwritten. With this fix,
we explicitly prefer +00:00 (if set).
This commit is contained in:
Carsten Otto 2024-09-15 19:33:55 +02:00
parent b06ea687b4
commit 7abe36f820
2 changed files with 26 additions and 7 deletions
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23
server/src/services/metadata.service.spec.ts
View File

@ -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 { constants } from 'node:fs/promises';
@ -854,10 +855,30 @@ describe(MetadataService.name, () => {
metadataMock.readTags.mockResolvedValue(tags);
await sut.handleMetadataExtraction({ id: assetStub.image.id });
expect(assetMock.getByIds).toHaveBeenCalledWith([assetStub.image.id]);
expect(assetMock.upsertExif).toHaveBeenCalledWith(
expect.objectContaining({
timeZone: 'UTC+0',
dateTimeOriginal: DateTime.fromISO('2024-09-01T00:00:00.000Z').toJSDate(),
}),
);
});
it('should extract +00:00 timezone from raw value despite conflicting GPS location/timezone', async () => {
// exiftool-vendored returns a timezone derived from GPS coordinates even though "+00:00" might be set explicitly
// https://github.com/photostructure/exiftool-vendored.js/issues/203
const tags: ImmichTags = {
DateTimeOriginal: ExifDateTime.fromISO('2024-09-15T00:00:00.000+00:00'),
tz: 'America/Santiago',
};
assetMock.getByIds.mockResolvedValue([assetStub.image]);
metadataMock.readTags.mockResolvedValue(tags);
await sut.handleMetadataExtraction({ id: assetStub.image.id });
expect(assetMock.upsertExif).toHaveBeenCalledWith(
expect.objectContaining({
timeZone: 'UTC+0',
dateTimeOriginal: DateTime.fromISO('2024-09-15T00:00:00.000Z').toJSDate(),
}),
);
});

8
server/src/services/metadata.service.ts
View File

@ -608,12 +608,10 @@ export class MetadataService {
}
// timezone
let timeZone = exifTags.tz ?? null;
if (timeZone == null && dateTime?.rawValue?.endsWith('+00:00')) {
// exiftool-vendored returns "no timezone" information even though "+00:00" might be set explicitly
// exiftool-vendored returns "no timezone" information or one derived from GPS coordinates even though "+00:00"
// might be set explicitly
// https://github.com/photostructure/exiftool-vendored.js/issues/203
timeZone = 'UTC+0';
}
const timeZone = dateTime?.rawValue?.endsWith('+00:00') ? 'UTC+0' : (exifTags.tz ?? null);
if (timeZone) {
this.logger.debug(`Asset ${asset.id} timezone is ${timeZone} (via ${exifTags.tzSource})`);