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readings.go
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readings.go
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package ukea
import (
"strings"
"time"
"github.com/mattn/go-nulltype"
"github.com/whitewater-guide/gorge/core"
)
type reading struct {
time core.HTime
levelMid string
level nulltype.NullFloat64
flow nulltype.NullFloat64
}
func (s *scriptUkea) getReadings(recv chan<- *core.Measurement, errs chan<- error) {
readings := map[string]reading{}
err := core.Client.StreamCSV(s.url+"/data/readings.csv?latest&_limit=10000", func(row []string) error {
t, err := time.ParseInLocation("2006-01-02T15:04:05Z", row[0], time.UTC)
if err != nil {
return nil
}
mid, code := getMeasureID(row[1])
var value nulltype.NullFloat64
err = value.Scan(row[2])
if err != nil {
return nil
}
r, ok := readings[code]
if !ok {
r = reading{
time: core.HTime{Time: t},
}
}
if strings.HasPrefix(mid, "flow") {
r.flow = value
} else if strings.HasPrefix(mid, "level") && !strings.HasPrefix(r.levelMid, "level-stage-i-15_min") {
r.levelMid = mid
r.level = value
}
readings[code] = r
return nil
}, core.CSVStreamOptions{
HeaderHeight: 1,
NumColumns: 3,
})
if err != nil {
errs <- err
return
}
for k, v := range readings {
if v.level.Valid() || v.flow.Valid() {
recv <- &core.Measurement{
GaugeID: core.GaugeID{
Script: s.name,
Code: k,
},
Timestamp: v.time,
Level: v.level,
Flow: v.flow,
}
}
}
}