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Add support for ceb pollution data source
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package ceb | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "github.com/hg/airmon/influx" | ||
| "github.com/hg/airmon/net" | ||
| "github.com/hg/airmon/tm" | ||
| influxdb2 "github.com/influxdata/influxdb-client-go/v2" | ||
| "github.com/pkg/errors" | ||
| "io/ioutil" | ||
| "log" | ||
| "net/http" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| type measurement struct { | ||
| Id string `json:"id"` | ||
| Title string `json:"post_title"` | ||
| Address string `json:"address"` | ||
| Lat float64 `json:"lat,string"` | ||
| Lon float64 `json:"lon,string"` | ||
| Pollutant string `json:"desc"` | ||
| PollutantFull string `json:"substance"` | ||
| ValueMg float64 `json:"value"` | ||
| Date tm.Time `json:"cdate"` | ||
| } | ||
|
|
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| func Collect(sender *influx.MeasurementSender) { | ||
| client := net.NewProxiedClient() | ||
| lastAt := time.Time{} | ||
|
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| for { | ||
| if measurements, err := getResponse(client); err == nil { | ||
| latest := time.Time{} | ||
| toSave := make([]measurement, len(measurements)) | ||
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| log.Print("found ", len(measurements), " ceb measurements") | ||
|
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| for _, meas := range measurements { | ||
| if meas.Date.After(lastAt) { | ||
| latest = meas.Date.Time | ||
| toSave = append(toSave, meas) | ||
| } | ||
| } | ||
|
|
||
| if !latest.IsZero() { | ||
| lastAt = latest | ||
| } | ||
|
|
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| go func() { | ||
| for _, ms := range toSave { | ||
| saveMeasurement(ms, sender) | ||
| } | ||
| }() | ||
| } else { | ||
| log.Print("could not load data: ", err) | ||
| } | ||
|
|
||
| time.Sleep(5 * time.Minute) | ||
| } | ||
| } | ||
|
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| func saveMeasurement(ms measurement, sender *influx.MeasurementSender) { | ||
| endOfFormula := strings.Index(ms.PollutantFull, "-") | ||
| if endOfFormula <= 0 { | ||
| return | ||
| } | ||
|
|
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| tags := map[string]string{ | ||
| "station": ms.Title, | ||
| "address": ms.Address, | ||
| "formula": ms.PollutantFull[:endOfFormula], | ||
| "pollutant": ms.Pollutant, | ||
| } | ||
|
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| fields := map[string]interface{}{ | ||
| "level_ug": ms.ValueMg * 1000, | ||
| "lat": ms.Lat, | ||
| "lon": ms.Lon, | ||
| } | ||
|
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| sender.Send(influxdb2.NewPoint("ceb", tags, fields, ms.Date.Time)) | ||
| } | ||
|
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| func getResponse(client *http.Client) ([]measurement, error) { | ||
| resp, err := client.Get("https://ceb-uk.kz/map/ajax.php?markers") | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "data fetch failed") | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| body, err := ioutil.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "could not read response") | ||
| } | ||
|
|
||
| var measurements []measurement | ||
| err = json.Unmarshal(body, &measurements) | ||
| return measurements, err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| package tm | ||
|
|
||
| import ( | ||
| "log" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
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| const timeFormat = "2006-01-02 15:04:05" | ||
|
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| type Time struct { | ||
| time.Time | ||
| } | ||
|
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| var location *time.Location | ||
|
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| func init() { | ||
| var err error | ||
| if location, err = time.LoadLocation("Asia/Almaty"); err != nil { | ||
| log.Fatal("could not find timezone") | ||
| } | ||
| } | ||
|
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| func (t *Time) UnmarshalJSON(b []byte) (err error) { | ||
| s := strings.Trim(string(b), `"`) | ||
| if s == "null" { | ||
| t.Time = time.Time{} | ||
| return nil | ||
| } | ||
| t.Time, err = time.ParseInLocation(timeFormat, s, location) | ||
| return err | ||
| } |