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script.go
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script.go
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package nzcan
import (
"context"
"github.com/whitewater-guide/gorge/core"
)
type optionsNzcan struct{}
type scriptNzcan struct {
name string
url string
// upstream assumes current year, but for stable tests we have to parametrize it
year int
core.LoggingScript
}
func (s *scriptNzcan) ListGauges() (core.Gauges, error) {
locations, err := s.fetchGeo()
if err != nil {
return nil, err
}
msmnts := make(chan *core.Measurement)
go func() {
defer close(msmnts)
err = s.fetchList("NORTH", msmnts)
if err != nil {
return
}
err = s.fetchList("SOUTH", msmnts)
}()
var result core.Gauges
for m := range msmnts {
loc := locations[m.Code]
var levelUnit, flowUnit string
if m.Flow.Valid() {
flowUnit = "m3/s"
}
if m.Level.Valid() {
levelUnit = "m"
}
result = append(result, core.Gauge{
GaugeID: core.GaugeID{
Script: s.name,
Code: m.Code,
},
Name: loc.name,
URL: "https://ecan.govt.nz/data/riverflow/sitedetails/" + m.Code,
LevelUnit: levelUnit,
FlowUnit: flowUnit,
Location: loc.location,
})
}
return result, err
}
func (s *scriptNzcan) Harvest(ctx context.Context, recv chan<- *core.Measurement, errs chan<- error, codes core.StringSet, since int64) {
defer close(recv)
defer close(errs)
err := s.fetchList("NORTH", recv)
if err != nil {
errs <- err
return
}
err = s.fetchList("SOUTH", recv)
if err != nil {
errs <- err
return
}
}