369 lines
11 KiB
Go
369 lines
11 KiB
Go
package meta
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import (
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"fmt"
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"path/filepath"
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"reflect"
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"runtime/debug"
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"strconv"
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"strings"
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"time"
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"github.com/tidwall/gjson"
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"gopkg.in/photoprism/go-tz.v2/tz"
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"github.com/photoprism/photoprism/pkg/clean"
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"github.com/photoprism/photoprism/pkg/projection"
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"github.com/photoprism/photoprism/pkg/rnd"
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"github.com/photoprism/photoprism/pkg/txt"
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"github.com/photoprism/photoprism/pkg/video"
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)
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const MimeVideoMP4 = "video/mp4"
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const MimeQuicktime = "video/quicktime"
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// Exiftool parses JSON sidecar data as created by Exiftool.
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func (data *Data) Exiftool(jsonData []byte, originalName string) (err error) {
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defer func() {
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if e := recover(); e != nil {
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err = fmt.Errorf("metadata: %s (exiftool panic)\nstack: %s", e, debug.Stack())
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}
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}()
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j := gjson.GetBytes(jsonData, "@flatten|@join")
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logName := "json file"
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if originalName != "" {
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logName = clean.Log(filepath.Base(originalName))
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}
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if !j.IsObject() {
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return fmt.Errorf("metadata: data is not an object in %s (exiftool)", logName)
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}
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data.json = make(map[string]string)
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jsonValues := j.Map()
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for key, val := range jsonValues {
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data.json[key] = val.String()
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}
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if fileName, ok := data.json["FileName"]; ok && fileName != "" && originalName != "" && fileName != originalName {
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return fmt.Errorf("metadata: original name %s does not match %s (exiftool)", clean.Log(originalName), clean.Log(fileName))
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} else if fileName != "" && originalName == "" {
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logName = clean.Log(filepath.Base(fileName))
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}
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v := reflect.ValueOf(data).Elem()
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// Iterate through all config fields
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for i := 0; i < v.NumField(); i++ {
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fieldValue := v.Field(i)
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tagData := v.Type().Field(i).Tag.Get("meta")
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// Automatically assign values to fields with "flag" tag
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if tagData != "" {
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tagValues := strings.Split(tagData, ",")
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var jsonValue gjson.Result
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var tagValue string
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for _, tagValue = range tagValues {
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if r, ok := jsonValues[tagValue]; !ok {
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continue
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} else if txt.Empty(r.String()) {
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continue
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} else {
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jsonValue = r
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break
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}
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}
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// Skip empty values.
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if !jsonValue.Exists() {
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continue
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}
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switch t := fieldValue.Interface().(type) {
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case time.Time:
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if !fieldValue.IsZero() {
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continue
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}
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if dateTime := txt.DateTime(jsonValue.String(), ""); !dateTime.IsZero() {
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fieldValue.Set(reflect.ValueOf(dateTime))
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}
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case time.Duration:
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if !fieldValue.IsZero() {
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continue
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}
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fieldValue.Set(reflect.ValueOf(Duration(jsonValue.String())))
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case int, int64:
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if !fieldValue.IsZero() {
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continue
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}
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if intVal := jsonValue.Int(); intVal != 0 {
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fieldValue.SetInt(intVal)
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} else if intVal = txt.Int64(jsonValue.String()); intVal != 0 {
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fieldValue.SetInt(intVal)
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}
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case float32, float64:
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if !fieldValue.IsZero() {
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continue
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}
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if f := jsonValue.Float(); f != 0 {
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fieldValue.SetFloat(f)
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} else if f = txt.Float(jsonValue.String()); f != 0 {
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fieldValue.SetFloat(f)
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}
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case uint, uint64:
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if !fieldValue.IsZero() {
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continue
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}
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if uintVal := jsonValue.Uint(); uintVal > 0 {
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fieldValue.SetUint(uintVal)
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} else if intVal := txt.Int64(jsonValue.String()); intVal > 0 {
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fieldValue.SetUint(uint64(intVal))
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}
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case []string:
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existing := fieldValue.Interface().([]string)
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fieldValue.Set(reflect.ValueOf(txt.AddToWords(existing, SanitizeUnicode(jsonValue.String()))))
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case Keywords:
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existing := fieldValue.Interface().(Keywords)
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fieldValue.Set(reflect.ValueOf(txt.AddToWords(existing, SanitizeUnicode(jsonValue.String()))))
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case projection.Type:
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if !fieldValue.IsZero() {
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continue
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}
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fieldValue.Set(reflect.ValueOf(projection.Type(SanitizeUnicode(jsonValue.String()))))
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case string:
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if !fieldValue.IsZero() {
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continue
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}
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fieldValue.SetString(SanitizeUnicode(jsonValue.String()))
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case bool:
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if !fieldValue.IsZero() {
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continue
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}
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fieldValue.SetBool(jsonValue.Bool())
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default:
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log.Warnf("metadata: cannot assign value of type %s to %s (exiftool)", t, tagValue)
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}
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}
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}
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// Nanoseconds.
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if data.TakenNs <= 0 {
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for _, name := range exifSubSecTags {
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if s := data.json[name]; txt.IsPosInt(s) {
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data.TakenNs = txt.Int(s + strings.Repeat("0", 9-len(s)))
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break
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}
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}
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}
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// Set latitude and longitude if known and not already set.
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if data.Lat == 0 && data.Lng == 0 {
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if data.GPSPosition != "" {
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lat, lng := GpsToLatLng(data.GPSPosition)
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data.Lat, data.Lng = NormalizeGPS(lat, lng)
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} else if data.GPSLatitude != "" && data.GPSLongitude != "" {
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data.Lat, data.Lng = NormalizeGPS(GpsToDecimal(data.GPSLatitude), GpsToDecimal(data.GPSLongitude))
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}
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}
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if data.Altitude == 0 {
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// Parseable floating point number?
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if fl := GpsFloatRegexp.FindAllString(data.json["GPSAltitude"], -1); len(fl) != 1 {
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// Ignore.
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} else if alt, err := strconv.ParseFloat(fl[0], 64); err == nil && alt != 0 {
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data.Altitude = alt
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}
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}
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hasTimeOffset := false
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// Has Media Create Date?
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if !data.CreatedAt.IsZero() {
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data.TakenAt = data.CreatedAt
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}
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// Fallback to GPS UTC Time?
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if data.TakenAt.IsZero() && data.TakenAtLocal.IsZero() && !data.TakenGps.IsZero() {
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data.TimeZone = time.UTC.String()
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data.TakenAt = data.TakenGps.UTC()
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data.TakenAtLocal = time.Time{}
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}
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// Check plausibility of the local <> UTC time difference.
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if !data.TakenAt.IsZero() && !data.TakenAtLocal.IsZero() {
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if d := data.TakenAt.Sub(data.TakenAtLocal).Abs(); d > time.Hour*27 {
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log.Infof("metadata: %s has an invalid local time offset (%s)", logName, d.String())
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log.Debugf("metadata: %s was taken at %s, local time %s, create time %s, time zone %s", logName, clean.Log(data.TakenAt.UTC().String()), clean.Log(data.TakenAtLocal.String()), clean.Log(data.CreatedAt.String()), clean.Log(data.TimeZone))
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data.TakenAtLocal = data.TakenAt
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data.TakenAt = data.TakenAt.UTC()
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}
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}
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// Has time zone offset?
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if _, offset := data.TakenAtLocal.Zone(); offset != 0 && !data.TakenAtLocal.IsZero() {
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hasTimeOffset = true
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} else if mt, ok := data.json["MIMEType"]; ok && data.TakenAtLocal.IsZero() && (mt == MimeVideoMP4 || mt == MimeQuicktime) {
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// Assume default time zone for MP4 & Quicktime videos is UTC.
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// see https://exiftool.org/TagNames/QuickTime.html
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log.Debugf("metadata: %s uses utc by default (%s)", logName, clean.Log(mt))
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data.TimeZone = time.UTC.String()
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data.TakenAt = data.TakenAt.UTC()
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data.TakenAtLocal = time.Time{}
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}
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// Set time zone and calculate UTC time.
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if data.Lat != 0 && data.Lng != 0 {
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zones, err := tz.GetZone(tz.Point{
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Lat: float64(data.Lat),
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Lon: float64(data.Lng),
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})
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if err == nil && len(zones) > 0 {
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data.TimeZone = zones[0]
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}
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if loc, err := time.LoadLocation(data.TimeZone); err != nil {
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log.Warnf("metadata: unknown time zone %s (exiftool)", data.TimeZone)
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} else if !data.TakenAtLocal.IsZero() {
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if tl, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAtLocal.Format("2006:01:02 15:04:05"), loc); err == nil {
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if localUtc, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAtLocal.Format("2006:01:02 15:04:05"), time.UTC); err == nil {
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data.TakenAtLocal = localUtc
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}
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data.TakenAt = tl.Truncate(time.Second).UTC()
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} else {
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log.Errorf("metadata: %s (exiftool)", err.Error()) // this should never happen
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}
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} else if !data.TakenAt.IsZero() {
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if localUtc, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAt.In(loc).Format("2006:01:02 15:04:05"), time.UTC); err == nil {
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data.TakenAtLocal = localUtc
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data.TakenAt = data.TakenAt.UTC()
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} else {
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log.Errorf("metadata: %s (exiftool)", err.Error()) // this should never happen
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}
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}
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} else if hasTimeOffset {
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if localUtc, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAtLocal.Format("2006:01:02 15:04:05"), time.UTC); err == nil {
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data.TakenAtLocal = localUtc
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}
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data.TakenAt = data.TakenAt.Truncate(time.Second).UTC()
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}
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// Set local time if still empty.
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if data.TakenAtLocal.IsZero() && !data.TakenAt.IsZero() {
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if loc, err := time.LoadLocation(data.TimeZone); data.TimeZone == "" || err != nil {
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data.TakenAtLocal = data.TakenAt
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} else if localUtc, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAt.In(loc).Format("2006:01:02 15:04:05"), time.UTC); err == nil {
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data.TakenAtLocal = localUtc
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data.TakenAt = data.TakenAt.UTC()
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} else {
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log.Errorf("metadata: %s (exiftool)", err.Error()) // this should never happen
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}
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}
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// Add nanoseconds to the calculated UTC and local time.
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if data.TakenAt.Nanosecond() == 0 {
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if ns := time.Duration(data.TakenNs); ns > 0 && ns <= time.Second {
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data.TakenAt.Truncate(time.Second).UTC().Add(ns)
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data.TakenAtLocal.Truncate(time.Second).Add(ns)
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}
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}
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// Use actual image width and height if available, see issue #2447.
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if jsonValues["ImageWidth"].Exists() && jsonValues["ImageHeight"].Exists() {
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if val := jsonValues["ImageWidth"].Int(); val > 0 {
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data.Width = int(val)
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}
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if val := jsonValues["ImageHeight"].Int(); val > 0 {
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data.Height = int(val)
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}
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}
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// Image orientation, see https://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/.
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if orientation, ok := data.json["Orientation"]; ok && orientation != "" {
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switch orientation {
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case "1", "Horizontal (normal)":
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data.Orientation = 1
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case "2":
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data.Orientation = 2
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case "3", "Rotate 180 CW":
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data.Orientation = 3
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case "4":
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data.Orientation = 4
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case "5":
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data.Orientation = 5
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case "6", "Rotate 90 CW":
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data.Orientation = 6
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case "7":
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data.Orientation = 7
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case "8", "Rotate 270 CW":
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data.Orientation = 8
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}
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}
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if data.Orientation == 0 {
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// Set orientation based on rotation.
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switch data.Rotation {
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case 0:
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data.Orientation = 1
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case -180, 180:
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data.Orientation = 3
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case 90:
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data.Orientation = 6
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case -90, 270:
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data.Orientation = 8
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}
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}
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// Normalize codec name.
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data.Codec = strings.ToLower(data.Codec)
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if strings.Contains(data.Codec, CodecJpeg) { // JPEG Image?
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data.Codec = CodecJpeg
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} else if c, ok := video.Codecs[data.Codec]; ok { // Video codec?
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data.Codec = string(c)
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} else if strings.HasPrefix(data.Codec, "a_") { // Audio codec?
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data.Codec = ""
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}
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// Validate and normalize optional DocumentID.
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if data.DocumentID != "" {
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data.DocumentID = rnd.SanitizeUUID(data.DocumentID)
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}
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// Validate and normalize optional InstanceID.
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if data.InstanceID != "" {
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data.InstanceID = rnd.SanitizeUUID(data.InstanceID)
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}
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if projection.Equirectangular.Equal(data.Projection) {
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data.AddKeywords(KeywordPanorama)
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}
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if data.Description != "" {
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data.AutoAddKeywords(data.Description)
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data.Description = SanitizeDescription(data.Description)
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}
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data.Title = SanitizeTitle(data.Title)
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data.Subject = SanitizeMeta(data.Subject)
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data.Artist = SanitizeMeta(data.Artist)
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return nil
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}
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