shape.go

package gtfs

import (
	"strconv"
)

type Shape struct {

	// Copy of first ShapePoint in Points
	Id string

	Points []*ShapePoint

	// Copy of Route.Color for json export
	Color string
}

// shapes.txt
type ShapePoint struct {
	// shape_id - Required. The shape_id field contains an ID that uniquely identifies a shape.
	Id string

	// shape_pt_lat - Required. The shape_pt_lat field associates a shape point's latitude with a shape ID. 
	// The field value must be a valid WGS 84 latitude. Each row in shapes.txt represents a shape point in your shape definition.
	// For example, if the shape "A_shp" has three points in its definition, the shapes.txt file might contain these rows to define the shape:
	// 		A_shp,37.61956,-122.48161,0
	// 		A_shp,37.64430,-122.41070,6
	// 		A_shp,37.65863,-122.30839,11
	Lat float64

	// shape_pt_lon - Required. The shape_pt_lon field associates a shape point's longitude with a shape ID. The field value must be a 
	// valid WGS 84 longitude value from -180 to 180. Each row in shapes.txt represents a shape point in your shape definition.
	// For example, if the shape "A_shp" has three points in its definition, the shapes.txt file might contain these rows to define the shape:
	// 		A_shp,37.61956,-122.48161,0
	// 		A_shp,37.64430,-122.41070,6
	// 		A_shp,37.65863,-122.30839,11
	Lon float64

	// shape_pt_sequence - Required. The shape_pt_sequence field associates the latitude and longitude of a shape point with its sequence 
	// order along the shape. The values for shape_pt_sequence must be non-negative integers, and they must increase along the trip.
	// For example, if the shape "A_shp" has three points in its definition, the shapes.txt file might contain these rows to define the shape:
	// 		A_shp,37.61956,-122.48161,0
	// 		A_shp,37.64430,-122.41070,6
	// 		A_shp,37.65863,-122.30839,11
	PointSequence int

	// shape_dist_traveled - Optional. When used in the shapes.txt file, the shape_dist_traveled field positions a shape point as a distance traveled along a shape 
	// from the first shape point. The shape_dist_traveled field represents a real distance traveled along the route in units such as feet 
	// or kilometers. This information allows the trip planner to determine how much of the shape to draw when showing part of a trip on the map. 
	// 
	// The values used for shape_dist_traveled must increase along with shape_pt_sequence: they cannot be used to show reverse travel along a route. 
	// 
	// The units used for shape_dist_traveled in the shapes.txt file must match the units that are used for this field in the stop_times.txt file.
	// For example, if a bus travels along the three points defined above for A_shp, the additional shape_dist_traveled values 
	// (shown here in kilometers) would look like this:
	// 		A_shp,37.61956,-122.48161,0,0
	// 		A_shp,37.64430,-122.41070,6,6.8310
	// 		A_shp,37.65863,-122.30839,11,15.8765
	DistanceTraveled float64

	feed *Feed
}

func (sp *ShapePoint) setField(fieldName, val string) {
	// log.Println("setField", fieldName, value)
	switch fieldName {
	case "shape_id":
		sp.Id = val
		break
	case "shape_pt_lat":
		v, _ := strconv.ParseFloat(val, 64) // Should panic on error !
		sp.Lat = v
		break
	case "shape_pt_lon":
		v, _ := strconv.ParseFloat(val, 64) // Should panic on error !
		sp.Lon = v
		break
	case "shape_pt_sequence":
		v, _ := strconv.Atoi(val) // Should panic on error !
		sp.PointSequence = v
		break
	case "shape_dist_traveled":
		v, _ := strconv.ParseFloat(val, 64) // Should panic on error !
		sp.DistanceTraveled = v
		break
	}
}