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A few extra comments added
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@ -1,10 +1,13 @@
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//The elements are [tag-name1, tag-name2, type of tag-name2]
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//The elements are [tag-name1, tag-name2, type of tag-name2]
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//tagname1 is typically a full date time, but in some cases tagname1 and tagname2 together make up a full timestamp
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//tagname1 is typically a full date time, but in some cases tagname1 and tagname2 together make up a full timestamp. The type makes it easier to code correct concatenation of tag1 and tag2
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//Interesting exiftool forums posts about some of these tags:
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//Interesting exiftool forums posts about some of these tags:
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//exif.DateTimeOriginal, exif.CreateDate/exif.DateTimeDigitized and exif.ModifyDate: https://exiftool.org/forum/index.php?topic=13170.msg71174#msg71174
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//https://exiftool.org/forum/index.php?topic=13170.msg71174#msg71174 - about the meaning of exif.DateTimeOriginal, exif.CreateDate/exif.DateTimeDigitized and exif.ModifyDate
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//https://exiftool.org/forum/index.php?topic=15555.msg83536#msg83536
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//https://exiftool.org/forum/index.php?topic=15555.msg83536#msg83536
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//This is the PRIORITIZED LIST of tags which Pigallery2 uses to determine the date of creation of pictures.
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//The list is used for embedded picture metadata and xmp-sidecar files for both pictures and vidoes.
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export const DateTags: [string, string, string][] = [
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export const DateTags: [string, string, string][] = [
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// Date tag Offset or time tag Type //Description
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// Date tag Offset or time tag Type //Description
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["exif.DateTimeOriginal", "exif.OffsetTimeOriginal", 'O'], //Date and time when the original image was taken - shutter close time
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["exif.DateTimeOriginal", "exif.OffsetTimeOriginal", 'O'], //Date and time when the original image was taken - shutter close time
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@ -249,6 +249,7 @@ export class MetadataLoader {
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if (fs.existsSync(sidecarPath)) {
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if (fs.existsSync(sidecarPath)) {
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const sidecarData: any = await exifr.sidecar(sidecarPath, exifrOptions);
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const sidecarData: any = await exifr.sidecar(sidecarPath, exifrOptions);
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if (sidecarData !== undefined) {
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if (sidecarData !== undefined) {
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//note that since side cars are loaded last, data loaded here overwrites embedded metadata (in Pigallery2, not in the actual files)
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MetadataLoader.mapMetadata(metadata, sidecarData);
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MetadataLoader.mapMetadata(metadata, sidecarData);
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break;
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break;
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}
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}
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@ -363,6 +364,7 @@ export class MetadataLoader {
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}
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}
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private static mapTimestampAndOffset(metadata: PhotoMetadata, exif: any) {
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private static mapTimestampAndOffset(metadata: PhotoMetadata, exif: any) {
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//This method looks for date tags matching the priorized list 'DateTags' of 'MetadataCreationDate'
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let ts: string, offset: string;
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let ts: string, offset: string;
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for (let i = 0; i < DateTags.length; i++) {
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for (let i = 0; i < DateTags.length; i++) {
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const [mainpath, extrapath, extratype] = DateTags[i];
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const [mainpath, extrapath, extratype] = DateTags[i];
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