func FixupComplaint(c *types.Complaint, key *datastore.Key) { // 0. Snag the key, so we can refer to this object later c.DatastoreKey = key.Encode() // 1. GAE datastore helpfully converts timezones to UTC upon storage; fix that c.Timestamp = date.InPdt(c.Timestamp) // 2. Compute the flight details URL, if within 24 days age := date.NowInPdt().Sub(c.Timestamp) if age < time.Hour*24 { // c.AircraftOverhead.Fr24Url = c.AircraftOverhead.PlaybackUrl() c.AircraftOverhead.Fr24Url = "http://flightaware.com/live/flight/" + c.AircraftOverhead.FlightNumber // Or: http://flightaware.com/live/flight/UAL337/history/20151215/ [0655Z/KLAX/KSFO] // date is UTC of departure time; might be tricky to guess :/ } // 3. Compute distances, if we have an aircraft if c.AircraftOverhead.FlightNumber != "" { a := c.AircraftOverhead aircraftPos := geo.Latlong{a.Lat, a.Long} observerPos := geo.Latlong{c.Profile.Lat, c.Profile.Long} c.Dist2KM = observerPos.Dist(aircraftPos) c.Dist3KM = observerPos.Dist3(aircraftPos, a.Altitude) } }
func (fr *Fr24) FindOverhead(observerPos geo.Latlong, overhead *Aircraft, grabAnything bool) (debug string, err error) { debug = fmt.Sprintf("*** FindOverhead for %s, at %s\n", observerPos, date.NowInPdt()) // Create a bounding box that's ~40m square, centred on the input lat,long // This is a grievous fudge http://www.movable-type.co.uk/scripts/latlong.html lat_20miles := 0.3 long_20miles := 0.35 nearby := []Aircraft{} if err = fr.ListBbox(observerPos.Lat-lat_20miles, observerPos.Long-long_20miles, observerPos.Lat+lat_20miles, observerPos.Long+long_20miles, &nearby); err != nil { debug += fmt.Sprintf("Lookup error: %s\n", err) return } for i, a := range nearby { aircraftPos := geo.Latlong{a.Lat, a.Long} nearby[i].Dist = observerPos.Dist(aircraftPos) nearby[i].Dist3 = observerPos.Dist3(aircraftPos, a.Altitude) nearby[i].BearingFromObserver = observerPos.BearingTowards(aircraftPos) } sort.Sort(byDist3(nearby)) debug += "** nearby list:-\n" + DebugFlightList(nearby) filtered := filterAircraft(nearby) if len(filtered) == 0 { debug += "** all empty after filtering\n" return } debug += "** filtered:-\n" + DebugFlightList(filtered) if grabAnything { *overhead = filtered[0] debug += "** grabbed 1st\n" } else { // closest plane has to be within 12 km to be 'overhead', and it has // to be 4km away from the next-closest if filtered[0].Dist3 < 12.0 { if (len(filtered) == 1) || (filtered[1].Dist3-filtered[0].Dist3) > 4.0 { *overhead = filtered[0] debug += "** selected 1st\n" } else { debug += "** 2nd was too close to 1st\n" } } else { debug += "** 1st was too far away\n" } } return }
func (f Flight) SnapshotAt(t time.Time, pos *geo.Latlong) (*FlightSnapshot, error) { if len(f.Track) == 0 { return nil, fmt.Errorf("SnapshotAt: found no trackpoints") } t = t.UTC() start, end := f.Track[0].TimestampUTC, f.Track[len(f.Track)-1].TimestampUTC if t.Before(start) { return nil, fmt.Errorf("SnapshotAt: t<start (t=%s, start=%s)", t, start) } else if t.After(end) { return nil, fmt.Errorf("SnapshotAt: t>end (t=%s, end=%s)", t, end) } for i, tp := range f.Track { if i == len(f.Track)-1 { break } if tp.TimestampUTC.Before(t) && f.Track[i+1].TimestampUTC.After(t) { // Grab the two trackpoints that bracket our time snap := &FlightSnapshot{ F: f, Pos: f.Track[i], NextPos: f.Track[i+1], } if pos != nil { snap.Reference = *pos snap.DistToReferenceKM = pos.Dist(f.Track[i].Latlong) snap.BearingToReference = float64(int64(pos.BearingTowards(f.Track[i].Latlong))) } return snap, nil } } return nil, fmt.Errorf("SnapshotAt: fell off the end, bad track ?") }
func (fr *Fr24) FindAllOverhead(observerPos geo.Latlong, overhead *flightid.Aircraft, grabAnything bool) (outAll []*Aircraft, outFilt []*Aircraft, debug string, err error) { outAll = []*Aircraft{} outFilt = []*Aircraft{} debug = fmt.Sprintf("*** FindOverhead for %s, at %s\n", observerPos, date.NowInPdt()) debug += fmt.Sprintf("* url: http://%s%s?array=1&bounds=%s\n", fr.host, kListUrlPath, "...") // Create a bounding box that's ~40m square, centred on the input lat,long // This is a grievous fudge http://www.movable-type.co.uk/scripts/latlong.html lat_20miles := 0.3 long_20miles := 0.35 nearby := []Aircraft{} if err = fr.ListBbox(observerPos.Lat-lat_20miles, observerPos.Long-long_20miles, observerPos.Lat+lat_20miles, observerPos.Long+long_20miles, &nearby); err != nil { debug += fmt.Sprintf("Lookup error: %s\n", err) return } for i, a := range nearby { // Hack for Surf Air; promote callsigns into (invalid_ flightnumbers, so they don't get stripped if a.FlightNumber == "" && regexp.MustCompile("^URF\\d+$").MatchString(a.Callsign) { nearby[i].FlightNumber = a.Callsign } else if a.FlightNumber != "" { if _, _, err := fdb.ParseIata(a.FlightNumber); err != nil { debug += "** saw bad flightnumber '" + a.FlightNumber + "' from fr24\n" nearby[i].FlightNumber = "" } } aircraftPos := geo.Latlong{a.Lat, a.Long} nearby[i].Dist = observerPos.Dist(aircraftPos) nearby[i].Dist3 = observerPos.Dist3(aircraftPos, a.Altitude) nearby[i].BearingFromObserver = observerPos.BearingTowards(aircraftPos) } sort.Sort(byDist3(nearby)) debug += "** nearby list:-\n" + DebugFlightList(nearby) filtered := filterAircraft(nearby) if len(filtered) == 0 { debug += "** all empty after filtering\n" return } for i, _ := range nearby { outAll = append(outAll, &nearby[i]) } for i, _ := range filtered { outFilt = append(outFilt, &filtered[i]) } debug += "** filtered:-\n" + DebugFlightList(filtered) if grabAnything { filtered[0].IntoFlightIdAircraft(overhead) debug += "** grabbed 1st\n" } else { // closest plane has to be within 12 km to be 'overhead', and it has // to be 4km away from the next-closest if filtered[0].Dist3 < 12.0 { if (len(filtered) == 1) || (filtered[1].Dist3-filtered[0].Dist3) > 4.0 { filtered[0].IntoFlightIdAircraft(overhead) debug += "** selected 1st\n" } else { debug += "** 2nd was too close to 1st\n" } } else { debug += "** 1st was too far away\n" } } return }