skyview/internal/parser/sbs1.go

package parser

import (
	"strconv"
	"strings"
	"time"
)

type Aircraft struct {
	Hex         string    `json:"hex"`
	Flight      string    `json:"flight,omitempty"`
	Altitude    int       `json:"alt_baro,omitempty"`
	GroundSpeed int       `json:"gs,omitempty"`
	Track       int       `json:"track,omitempty"`
	Latitude    float64   `json:"lat,omitempty"`
	Longitude   float64   `json:"lon,omitempty"`
	VertRate    int       `json:"vert_rate,omitempty"`
	Squawk      string    `json:"squawk,omitempty"`
	Emergency   bool      `json:"emergency,omitempty"`
	OnGround    bool      `json:"on_ground,omitempty"`
	LastSeen    time.Time `json:"last_seen"`
	Messages    int       `json:"messages"`
}

type AircraftData struct {
	Now      int64               `json:"now"`
	Messages int                 `json:"messages"`
	Aircraft map[string]Aircraft `json:"aircraft"`
}

func ParseSBS1Line(line string) (*Aircraft, error) {
	parts := strings.Split(strings.TrimSpace(line), ",")
	if len(parts) < 22 {
		return nil, nil
	}

	messageType := parts[1]
	if messageType != "1" && messageType != "3" && messageType != "4" {
		return nil, nil
	}

	aircraft := &Aircraft{
		Hex:      strings.TrimSpace(parts[4]),
		LastSeen: time.Now(),
		Messages: 1,
	}

	if parts[10] != "" {
		aircraft.Flight = strings.TrimSpace(parts[10])
	}

	if parts[11] != "" {
		if alt, err := strconv.Atoi(parts[11]); err == nil {
			aircraft.Altitude = alt
		}
	}

	if parts[12] != "" {
		if gs, err := strconv.Atoi(parts[12]); err == nil {
			aircraft.GroundSpeed = gs
		}
	}

	if parts[13] != "" {
		if track, err := strconv.Atoi(parts[13]); err == nil {
			aircraft.Track = track
		}
	}

	if parts[14] != "" && parts[15] != "" {
		if lat, err := strconv.ParseFloat(parts[14], 64); err == nil {
			aircraft.Latitude = lat
		}
		if lon, err := strconv.ParseFloat(parts[15], 64); err == nil {
			aircraft.Longitude = lon
		}
	}

	if parts[16] != "" {
		if vr, err := strconv.Atoi(parts[16]); err == nil {
			aircraft.VertRate = vr
		}
	}

	if parts[17] != "" {
		aircraft.Squawk = strings.TrimSpace(parts[17])
	}

	if parts[21] != "" {
		aircraft.OnGround = parts[21] == "1"
	}

	return aircraft, nil
}