photoprism/internal/meta/data.go

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package meta
import (
"math"
"time"
)
// Data represents image meta data.
type Data struct {
DocumentID string `meta:"ImageUniqueID,OriginalDocumentID,DocumentID"`
InstanceID string `meta:"InstanceID,DocumentID"`
TakenAt time.Time `meta:"DateTimeOriginal,CreateDate,MediaCreateDate,DateTimeDigitized,DateTime"`
TakenAtLocal time.Time `meta:"DateTimeOriginal,CreateDate,MediaCreateDate,DateTimeDigitized,DateTime"`
TimeZone string `meta:"-"`
Duration time.Duration `meta:"Duration,MediaDuration,TrackDuration"`
Codec string `meta:"CompressorID,Compression,FileType"`
Title string `meta:"Title"`
Subject string `meta:"Subject,PersonInImage,ObjectName"`
Keywords string `meta:"Keywords"`
Comment string `meta:"-"`
Artist string `meta:"Artist,Creator"`
Description string `meta:"Description"`
Copyright string `meta:"Rights,Copyright"`
CameraMake string `meta:"CameraMake,Make"`
CameraModel string `meta:"CameraModel,Model"`
CameraOwner string `meta:"OwnerName"`
CameraSerial string `meta:"SerialNumber"`
LensMake string `meta:"LensMake"`
LensModel string `meta:"Lens,LensModel"`
Flash bool `meta:"-"`
FocalLength int `meta:"-"`
Exposure string `meta:"ExposureTime"`
Aperture float32 `meta:"ApertureValue"`
FNumber float32 `meta:"FNumber"`
Iso int `meta:"ISO"`
GPSPosition string `meta:"GPSPosition"`
GPSLatitude string `meta:"GPSLatitude"`
GPSLongitude string `meta:"GPSLongitude"`
Lat float32 `meta:"-"`
Lng float32 `meta:"-"`
Altitude int `meta:"GlobalAltitude"`
Width int `meta:"PixelXDimension,ImageWidth,ExifImageWidth,SourceImageWidth"`
Height int `meta:"PixelYDimension,ImageHeight,ImageLength,ExifImageHeight,SourceImageHeight"`
Orientation int `meta:"-"`
Rotation int `meta:"Rotation"`
Error error `meta:"-"`
All map[string]string
}
// AspectRatio returns the aspect ratio based on width and height.
func (data Data) AspectRatio() float32 {
width := float64(data.ActualWidth())
height := float64(data.ActualHeight())
if width <= 0 || height <= 0 {
return 0
}
aspectRatio := float32(width / height)
return aspectRatio
}
// Portrait returns true if it's a portrait picture or video based on width and height.
func (data Data) Portrait() bool {
return data.Width < data.Height
}
// Megapixels returns the resolution in megapixels.
func (data Data) Megapixels() int {
return int(math.Round(float64(data.Width*data.Height) / 1000000))
}
// HasDocumentID returns true if a DocumentID exists.
func (data Data) HasDocumentID() bool {
return len(data.DocumentID) >= 15
}
// HasInstanceID returns true if an InstanceID exists.
func (data Data) HasInstanceID() bool {
return len(data.InstanceID) >= 15
}
// HasTimeAndPlace if data contains a time and gps position.
func (data Data) HasTimeAndPlace() bool {
return !data.TakenAt.IsZero() && data.Lat != 0 && data.Lng != 0
}
// ActualWidth is the width after rotating the media file if needed.
func (data Data) ActualWidth() int {
if data.Orientation > 4 {
return data.Height
}
return data.Width
}
// ActualHeight is the height after rotating the media file if needed.
func (data Data) ActualHeight() int {
if data.Orientation > 4 {
return data.Width
}
return data.Height
}