148 lines
3.7 KiB
Go
148 lines
3.7 KiB
Go
package meta
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import (
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"fmt"
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"io/ioutil"
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"path/filepath"
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"reflect"
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"strings"
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"time"
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"github.com/photoprism/photoprism/pkg/txt"
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"github.com/tidwall/gjson"
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"gopkg.in/ugjka/go-tz.v2/tz"
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)
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// JSON parses a json sidecar file (as used by Exiftool) and returns a Data struct.
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func JSON(fileName string) (data Data, err error) {
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err = data.JSON(fileName)
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return data, err
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}
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// JSON parses a json sidecar file (as used by Exiftool) and returns a Data struct.
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func (data *Data) JSON(fileName 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("%s (json metadata)", e)
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}
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}()
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if data.All == nil {
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data.All = make(map[string]string)
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}
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jsonString, err := ioutil.ReadFile(fileName)
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if err != nil {
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log.Warnf("meta: %s", err.Error())
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return fmt.Errorf("can't read %s (json)", txt.Quote(filepath.Base(fileName)))
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}
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j := gjson.GetBytes(jsonString, "@flatten|@join")
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if !j.IsObject() {
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return fmt.Errorf("data is not an object in %s (json)", txt.Quote(filepath.Base(fileName)))
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}
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jsonValues := j.Map()
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for key, val := range jsonValues {
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data.All[key] = val.String()
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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 {
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jsonValue = r
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break
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}
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}
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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 tv, err := time.Parse("2006:01:02 15:04:05", strings.TrimSpace(jsonValue.String())); err == nil {
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fieldValue.Set(reflect.ValueOf(tv.Round(time.Second).UTC()))
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}
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case time.Duration:
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fieldValue.Set(reflect.ValueOf(StringToDuration(jsonValue.String())))
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case int, int64:
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fieldValue.SetInt(jsonValue.Int())
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case float32, float64:
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fieldValue.SetFloat(jsonValue.Float())
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case uint, uint64:
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fieldValue.SetUint(jsonValue.Uint())
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case string:
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fieldValue.SetString(strings.TrimSpace(jsonValue.String()))
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case bool:
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fieldValue.SetBool(jsonValue.Bool())
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default:
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log.Warnf("meta: can't assign value of type %s to %s", t, tagValue)
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}
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}
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}
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// Calculate latitude and longitude if exists.
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if data.GPSPosition != "" {
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data.Lat, data.Lng = GpsToLatLng(data.GPSPosition)
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} else if data.GPSLatitude != "" && data.GPSLongitude != "" {
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data.Lat = GpsToDecimal(data.GPSLatitude)
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data.Lng = GpsToDecimal(data.GPSLongitude)
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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 !data.TakenAtLocal.IsZero() {
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if loc, err := time.LoadLocation(data.TimeZone); err != nil {
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log.Warnf("meta: unknown time zone %s", data.TimeZone)
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} else 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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data.TakenAt = tl.Round(time.Second).UTC()
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} else {
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log.Errorf("meta: %s", err.Error()) // this should never happen
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}
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}
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}
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// Fix rotation.
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if data.Rotation == 90 || data.Rotation == 270 || data.Rotation == -90 {
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data.Width, data.Height = data.Height, data.Width
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data.Rotation = 0
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}
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// Normalize compression information.
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data.Codec = strings.ToLower(data.Codec)
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if strings.Contains(data.Codec, CodecJpeg) {
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data.Codec = CodecJpeg
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}
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return nil
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}
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