/
completegeotripsfilter.go
executable file
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/
completegeotripsfilter.go
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// Copyright 2016 Patrick Brosi
// Authors: [email protected]
//
// Use of this source code is governed by a GPL v2
// license that can be found in the LICENSE file
package processors
import (
"github.com/patrickbr/gtfsparser"
"github.com/patrickbr/gtfsparser/gtfs"
)
// StopDuplicateRemover merges semantically equivalent stops
type CompleteTripsGeoFilter struct {
Polygons []gtfsparser.Polygon
}
// Run this StopDuplicateRemover on some feed
func (f CompleteTripsGeoFilter) Run(feed *gtfsparser.Feed) {
// collect stops within the polygons
filterstops := make(map[*gtfs.Stop]bool, 0)
usedstops := make(map[*gtfs.Stop]bool, 0)
for _, s := range feed.Stops {
for _, poly := range f.Polygons {
if poly.PolyContains(float64(s.Lon), float64(s.Lat)) {
filterstops[s] = true
usedstops[s] = true
if s.Parent_station != nil {
usedstops[s.Parent_station] = true
}
break
}
}
}
for id, t := range feed.Trips {
contained := false
for _, st := range t.StopTimes {
if _, ok := filterstops[st.Stop()]; ok {
contained = true
break
}
}
if !contained {
feed.DeleteTrip(id)
} else {
for _, st := range t.StopTimes {
usedstops[st.Stop()] = true
if st.Stop().Parent_station != nil {
usedstops[st.Stop().Parent_station] = true
}
}
}
}
toDel := make([]*gtfs.Stop, 0)
for _, s := range feed.Stops {
if _, ok := usedstops[s]; !ok {
toDel = append(toDel, s)
}
}
pathways := make(map[*gtfs.Stop][]*gtfs.Pathway, len(feed.Stops))
// collect pathways that use a stop
for _, p := range feed.Pathways {
pathways[p.From_stop] = append(pathways[p.From_stop], p)
if p.From_stop != p.To_stop {
pathways[p.To_stop] = append(pathways[p.To_stop], p)
}
}
for _, s := range toDel {
for _, p := range pathways[s] {
feed.DeletePathway(p.Id)
}
feed.DeleteStop(s.Id)
}
// delete transfers
feed.CleanTransfers()
}