package meta import ( "encoding/json" "fmt" "runtime/debug" "time" "gopkg.in/ugjka/go-tz.v2/tz" ) type GPhoto struct { Title string `json:"title"` Description string `json:"description"` Views int `json:"imageViews,string"` Geo GGeo `json:"geoData"` TakenAt GTime `json:"photoTakenTime"` CreatedAt GTime `json:"creationTime"` UpdatedAt GTime `json:"modificationTime"` } func (m GPhoto) SanitizedTitle() string { return SanitizeTitle(m.Title) } func (m GPhoto) SanitizedDescription() string { return SanitizeDescription(m.Description) } type GMeta struct { Album GAlbum `json:"albumData"` } type GAlbum struct { Title string `json:"title"` Description string `json:"description"` Access string `json:"access"` Location string `json:"location"` Date GTime `json:"date"` Geo GGeo `json:"geoData"` } func (m GAlbum) Exists() bool { return m.Title != "" } type GGeo struct { Lat float64 `json:"latitude"` Lng float64 `json:"longitude"` Altitude float64 `json:"altitude"` } func (m GGeo) Exists() bool { return m.Lat != 0.0 && m.Lng != 0.0 } type GTime struct { Unix int64 `json:"timestamp,string"` Formatted string `json:"formatted"` } func (m GTime) Exists() bool { return m.Unix > 0 } func (m GTime) Time() time.Time { return time.Unix(m.Unix, 0).UTC() } // Parses JSON sidecar data as created by Google Photos. func (data *Data) GMeta(jsonData []byte) (err error) { defer func() { if e := recover(); e != nil { err = fmt.Errorf("metadata: %s (gmeta panic)\nstack: %s", e, debug.Stack()) } }() p := GMeta{} if err := json.Unmarshal(jsonData, &p); err != nil { return err } if p.Album.Exists() { data.Albums = append(data.Albums, p.Album.Title) } return nil } // Parses JSON photo sidecar data as created by Google Photos. func (data *Data) GPhoto(jsonData []byte) (err error) { defer func() { if e := recover(); e != nil { err = fmt.Errorf("metadata: %s (gphoto panic)\nstack: %s", e, debug.Stack()) } }() p := GPhoto{} if err := json.Unmarshal(jsonData, &p); err != nil { return err } if s := p.SanitizedTitle(); s != "" && data.Title == "" { data.Title = s } if s := p.SanitizedDescription(); s != "" && data.Description == "" { data.Description = s } if p.Views > 0 && data.Views == 0 { data.Views = p.Views } if p.TakenAt.Exists() { if data.TakenAt.IsZero() { data.TakenAt = p.TakenAt.Time() } if data.TakenAtLocal.IsZero() { data.TakenAtLocal = p.TakenAt.Time() } } if p.Geo.Exists() { if data.Lat == 0 && data.Lng == 0 { data.Lat = float32(p.Geo.Lat) data.Lng = float32(p.Geo.Lng) } if data.Altitude == 0 { data.Altitude = int(p.Geo.Altitude) } } // Set time zone and calculate UTC time. if data.Lat != 0 && data.Lng != 0 { zones, err := tz.GetZone(tz.Point{ Lat: float64(data.Lat), Lon: float64(data.Lng), }) if err == nil && len(zones) > 0 { data.TimeZone = zones[0] } if !data.TakenAtLocal.IsZero() { if loc, err := time.LoadLocation(data.TimeZone); err != nil { log.Warnf("metadata: unknown time zone %s (gphotos)", data.TimeZone) } else if tl, err := time.ParseInLocation("2006:01:02 15:04:05", data.TakenAtLocal.Format("2006:01:02 15:04:05"), loc); err == nil { data.TakenAt = tl.Round(time.Second).UTC() } else { log.Errorf("metadata: %s (gphotos)", err.Error()) // this should never happen } } } return nil }