Added support for Area Forecast Discussions issued by the NWS

internal/normalizers/nws/forecast_discussion.go

@@ -0,0 +1,72 @@
+package nws
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/standards"
+)
+
+type ForecastDiscussionNormalizer struct{}
+
+func (ForecastDiscussionNormalizer) Match(e event.Event) bool {
+	return strings.TrimSpace(e.Schema) == standards.SchemaRawNWSForecastDiscussionV1
+}
+
+func (ForecastDiscussionNormalizer) Normalize(ctx context.Context, in event.Event) (*event.Event, error) {
+	_ = ctx
+
+	rawHTML, err := decodeStringPayload(in.Payload)
+	if err != nil {
+		return nil, fmt.Errorf("nws forecast discussion normalize: %w", err)
+	}
+
+	parsed, err := nwscommon.ParseForecastDiscussionHTML(rawHTML)
+	if err != nil {
+		return nil, fmt.Errorf("nws forecast discussion normalize: build: %w", err)
+	}
+
+	payload := model.WeatherForecastDiscussion{
+		OfficeID:    strings.TrimSpace(parsed.OfficeID),
+		OfficeName:  strings.TrimSpace(parsed.OfficeName),
+		Product:     model.ForecastDiscussionProduct(strings.TrimSpace(parsed.Product)),
+		IssuedAt:    parsed.IssuedAt.UTC(),
+		UpdatedAt:   parsed.UpdatedAt,
+		KeyMessages: append([]string(nil), parsed.KeyMessages...),
+		ShortTerm:   mapForecastDiscussionSection(parsed.ShortTerm),
+		LongTerm:    mapForecastDiscussionSection(parsed.LongTerm),
+	}
+
+	out, err := normcommon.Finalize(in, standards.SchemaWeatherForecastDiscussionV1, payload, payload.IssuedAt)
+	if err != nil {
+		return nil, fmt.Errorf("nws forecast discussion normalize: %w", err)
+	}
+	return out, nil
+}
+
+func mapForecastDiscussionSection(in *nwscommon.ForecastDiscussionSection) *model.WeatherForecastDiscussionSection {
+	if in == nil {
+		return nil
+	}
+	return &model.WeatherForecastDiscussionSection{
+		Qualifier: strings.TrimSpace(in.Qualifier),
+		IssuedAt:  in.IssuedAt,
+		Text:      strings.TrimSpace(in.Text),
+	}
+}
+
+func decodeStringPayload(payload any) (string, error) {
+	switch v := payload.(type) {
+	case string:
+		return v, nil
+	case []byte:
+		return string(v), nil
+	default:
+		return "", fmt.Errorf("extract payload: expected string payload, got %T", payload)
+	}
+}