media: handle location shares

Signed-off-by: Sumner Evans <sumner.evans@automattic.com>

pkg/connector/msgconv/geouri.go

@@ -0,0 +1,60 @@
+package msgconv
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type GeoURI struct {
+	Lat  float64
+	Long float64
+}
+
+var _ json.Unmarshaler = (*GeoURI)(nil)
+var _ json.Marshaler = (*GeoURI)(nil)
+
+func GeoURIFromLatLong(lat, long float64) GeoURI {
+	return GeoURI{lat, long}
+}
+
+func ParseGeoURI(uri string) (g GeoURI, err error) {
+	if !strings.HasPrefix(uri, "geo:") {
+		return g, fmt.Errorf("invalid geo URI: %s", uri)
+	}
+	coordinates := strings.Split(strings.TrimPrefix(uri, "geo:"), ";")[0]
+	parts := strings.Split(coordinates, ",")
+	if len(parts) != 2 {
+		return g, fmt.Errorf("geo coordinates not formatted properly")
+	}
+	g.Lat, err = strconv.ParseFloat(parts[0], 64)
+	if err != nil {
+		return g, fmt.Errorf("failed to parse latitude: %w", err)
+	}
+	g.Long, err = strconv.ParseFloat(parts[1], 64)
+	if err != nil {
+		return g, fmt.Errorf("failed to parse longitude: %w", err)
+	}
+	return
+}
+
+func (g GeoURI) URI() string {
+	return fmt.Sprintf("geo:%f,%f", g.Lat, g.Long)
+}
+
+func (g *GeoURI) UnmarshalJSON(data []byte) (err error) {
+	var uri string
+	err = json.Unmarshal(data, &uri)
+	if err != nil {
+		return err
+	}
+	geo, err := ParseGeoURI(uri)
+	g.Lat = geo.Lat
+	g.Long = geo.Long
+	return
+}
+
+func (g *GeoURI) MarshalJSON() ([]byte, error) {
+	return json.Marshal(g.URI())
+}