Eric Rakestraw
40f17c9d86
All checks were successful
ci/woodpecker/push/build-image Pipeline was successful
99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// FILE: ./internal/sources/openmeteo/observation.go
|
|
package openmeteo
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"time"
|
|
|
|
"gitea.maximumdirect.net/ejr/feedkit/config"
|
|
"gitea.maximumdirect.net/ejr/feedkit/event"
|
|
fksources "gitea.maximumdirect.net/ejr/feedkit/sources"
|
|
"gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openmeteo"
|
|
"gitea.maximumdirect.net/ejr/weatherfeeder/standards"
|
|
)
|
|
|
|
// ObservationSource polls an Open-Meteo endpoint and emits one RAW Observation Event.
|
|
type ObservationSource struct {
|
|
http *fksources.HTTPSource
|
|
}
|
|
|
|
func NewObservationSource(cfg config.SourceConfig) (*ObservationSource, error) {
|
|
const driver = "openmeteo_observation"
|
|
|
|
hs, err := fksources.NewHTTPSource(driver, cfg, "application/json")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &ObservationSource{http: hs}, nil
|
|
}
|
|
|
|
func (s *ObservationSource) Name() string { return s.http.Name }
|
|
|
|
func (s *ObservationSource) Kinds() []event.Kind { return []event.Kind{event.Kind("observation")} }
|
|
|
|
func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
|
|
raw, meta, changed, err := s.fetchRaw(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !changed {
|
|
return nil, nil
|
|
}
|
|
|
|
var effectiveAt *time.Time
|
|
if !meta.ParsedTimestamp.IsZero() {
|
|
t := meta.ParsedTimestamp.UTC()
|
|
effectiveAt = &t
|
|
}
|
|
|
|
emittedAt := time.Now().UTC()
|
|
eventID := fksources.DefaultEventID("", s.http.Name, effectiveAt, emittedAt)
|
|
|
|
return fksources.SingleEvent(
|
|
event.Kind("observation"),
|
|
s.http.Name,
|
|
standards.SchemaRawOpenMeteoCurrentV1,
|
|
eventID,
|
|
emittedAt,
|
|
effectiveAt,
|
|
raw,
|
|
)
|
|
}
|
|
|
|
// ---- RAW fetch + minimal metadata decode ----
|
|
|
|
type openMeteoMeta struct {
|
|
Timezone string `json:"timezone"`
|
|
UTCOffsetSeconds int `json:"utc_offset_seconds"`
|
|
|
|
Current struct {
|
|
Time string `json:"time"`
|
|
} `json:"current"`
|
|
|
|
ParsedTimestamp time.Time `json:"-"`
|
|
}
|
|
|
|
func (s *ObservationSource) fetchRaw(ctx context.Context) (json.RawMessage, openMeteoMeta, bool, error) {
|
|
raw, changed, err := s.http.FetchJSONIfChanged(ctx)
|
|
if err != nil {
|
|
return nil, openMeteoMeta{}, false, err
|
|
}
|
|
if !changed {
|
|
return nil, openMeteoMeta{}, false, nil
|
|
}
|
|
|
|
var meta openMeteoMeta
|
|
if err := json.Unmarshal(raw, &meta); err != nil {
|
|
// If metadata decode fails, still return raw; envelope will omit EffectiveAt.
|
|
return raw, openMeteoMeta{}, true, nil
|
|
}
|
|
|
|
if t, err := openmeteo.ParseTime(meta.Current.Time, meta.Timezone, meta.UTCOffsetSeconds); err == nil {
|
|
meta.ParsedTimestamp = t.UTC()
|
|
}
|
|
|
|
return raw, meta, true, nil
|
|
}
|