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Named the types to explain more clearly

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gras 2024-04-18 23:57:22 +02:00
parent 7077fedc5a
commit 32225ca091
1 changed files with 4 additions and 3 deletions
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src/backend/model/fileaccess/MetadataCreationDate.ts
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@ -1,5 +1,6 @@
//The elements are [tag-name1, tag-name2, type of tag-name2] type MainDateTag = string; //The main date tag, where the date is to be found. Typically has both date, time and offset. Except (see SecondaryDateTag and -Type)
//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 type SecondaryDateTag = string | undefined; //The secondary date tag, which is sometimes needed to get a full date (sometimes contains offset, sometimes the time part of a timestamp)
type SecondaryDateTagType = 'O' | 'T' | undefined; //The secondary date tag type: 'O' for offset, 'T' for time undefined, if there is no secondary tag for the main tag
//Interesting exiftool forums posts about some of these tags: //Interesting exiftool forums posts about some of these tags:
//https://exiftool.org/forum/index.php?topic=13170.msg71174#msg71174 - about the meaning of exif.DateTimeOriginal, exif.CreateDate/exif.DateTimeDigitized and exif.ModifyDate //https://exiftool.org/forum/index.php?topic=13170.msg71174#msg71174 - about the meaning of exif.DateTimeOriginal, exif.CreateDate/exif.DateTimeDigitized and exif.ModifyDate
@ -8,7 +9,7 @@
//This is the PRIORITIZED LIST of tags which Pigallery2 uses to determine the date of creation of pictures. //This is the PRIORITIZED LIST of tags which Pigallery2 uses to determine the date of creation of pictures.
//The list is used for embedded picture metadata and xmp-sidecar files for both pictures and vidoes. //The list is used for embedded picture metadata and xmp-sidecar files for both pictures and vidoes.
export const DateTags: [string, string, string][] = [ export const DateTags: [MainDateTag, SecondaryDateTag, SecondaryDateTagType][] = [
// Date tag Offset or time tag Type //Description // Date tag Offset or time tag Type //Description
["exif.DateTimeOriginal", "exif.OffsetTimeOriginal", 'O'], //Date and time when the original image was taken - shutter close time ["exif.DateTimeOriginal", "exif.OffsetTimeOriginal", 'O'], //Date and time when the original image was taken - shutter close time
["exif.CreateDate", "exif.OffsetTimeDigitized", 'O'], //Date and time when the image was created ["exif.CreateDate", "exif.OffsetTimeDigitized", 'O'], //Date and time when the image was created