photoprism/internal/maps/location.go

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package maps
import (
"errors"
"strings"
"github.com/photoprism/photoprism/internal/maps/osm"
)
/* TODO
(SELECT pl.loc_label as album_name, pl.loc_country, YEAR(ph.taken_at) as taken_year, round(count(ph.id)) as photo_count FROM photos ph
JOIN places pl ON ph.place_id = pl.id AND pl.id <> 1
GROUP BY album_name, taken_year HAVING photo_count > 5) UNION (
SELECT c.country_name AS album_name, pl.loc_country, YEAR(ph.taken_at) as taken_year, round(count(ph.id)) as photo_count FROM photos ph
JOIN places pl ON ph.place_id = pl.id AND pl.id <> 1
JOIN countries c ON c.id = pl.loc_country
GROUP BY album_name, taken_year
HAVING photo_count > 10)
ORDER BY loc_country, album_name, taken_year;
*/
// Photo location
type Location struct {
ID uint64
LocLat float64
LocLng float64
LocName string
LocCategory string
LocSuburb string
LocLabel string
LocCity string
LocState string
LocCountry string
LocSource string
}
type LocationSource interface {
CountryCode() string
Latitude() float64
Longitude() float64
Category() string
Name() string
City() string
Suburb() string
State() string
Source() string
}
func NewLocation(lat, lng float64) *Location {
id := S2Encode(lat, lng)
result := &Location{
ID: id,
LocLat: lat,
LocLng: lng,
}
return result
}
func (l *Location) Query() error {
o, err := osm.FindLocation(l.LocLat, l.LocLng)
if err != nil {
return err
}
return l.Assign(o)
}
func (l *Location) Assign(s LocationSource) error {
l.LocSource = s.Source()
if l.LocLat == 0 {
l.LocLat = s.Latitude()
}
if l.LocLng == 0 {
l.LocLng = s.Longitude()
}
if l.Unknown() {
l.LocCategory = "unknown"
return errors.New("maps: unknown location")
}
if l.ID == 0 {
l.ID = S2Encode(l.LocLat, l.LocLng)
}
l.LocName = s.Name()
l.LocCity = s.City()
l.LocSuburb = s.Suburb()
l.LocState = s.State()
l.LocCountry = s.CountryCode()
l.LocCategory = s.Category()
l.LocLabel = l.label()
return nil
}
func (l *Location) Unknown() bool {
if l.LocLng == 0.0 && l.LocLat == 0.0 {
return true
}
return false
}
func (l *Location) label() string {
if l.Unknown() {
return "Unknown"
}
var countryName = l.CountryName()
var loc []string
shortCountry := len([]rune(countryName)) <= 20
if l.LocCity != "" {
loc = append(loc, l.LocCity)
}
if shortCountry && l.LocState != "" && l.LocCity != l.LocState {
loc = append(loc, l.LocState)
}
if countryName != "" {
loc = append(loc, countryName)
}
return strings.Join(loc[:], ", ")
}
func (l Location) Latitude() float64 {
return l.LocLat
}
func (l Location) Longitude() float64 {
return l.LocLng
}
func (l Location) Name() string {
return l.LocName
}
func (l Location) Category() string {
return l.LocCategory
}
func (l Location) Suburb() string {
return l.LocSuburb
}
func (l Location) Label() string {
return l.LocLabel
}
func (l Location) City() string {
return l.LocCity
}
func (l Location) State() string {
return l.LocState
}
func (l Location) CountryCode() string {
return l.LocCountry
}
func (l Location) CountryName() string {
return CountryNames[l.LocCountry]
}
func (l Location) Source() string {
return l.LocSource
}