Implement support for NWS weather stories

internal/adapters/weatherapi/client.go

@@ -109,10 +109,10 @@ func (c *Client) FetchBundle(ctx context.Context) (*forecast.Bundle, error) {
 	if err := builder.fetchDiscussion(ctx); err != nil {
 		return nil, err
 	}
-	if err := builder.addStub("daily", "daily forecast data is not available from the weather API yet"); err != nil {
+	if err := builder.fetchWeatherStory(ctx); err != nil {
 		return nil, err
 	}
-	if err := builder.addStub("weather_story", "NWS weather story is not available from the weather API yet"); err != nil {
+	if err := builder.addStub("daily", "daily forecast data is not available from the weather API yet"); err != nil {
 		return nil, err
 	}
 
@@ -246,6 +246,27 @@ func (b *bundleBuilder) fetchDiscussion(ctx context.Context) error {
 	return nil
 }
 
+func (b *bundleBuilder) fetchWeatherStory(ctx context.Context) error {
+	raw, source, err := b.client.fetch(ctx, "weather_story", "/weatherstories/latest", queryOptions{omitUnits: true})
+	if err != nil {
+		return err
+	}
+	if raw == nil {
+		return b.handleMissing(&source, "NWS weather story data is missing", false)
+	}
+	var story forecast.WeatherStory
+	if err := decodeSource(raw, &story); err != nil {
+		return b.handleMalformed(&source, err, false)
+	}
+	if !story.StartTime.IsZero() {
+		source.IssuedAt = &story.StartTime
+	}
+	source.UpdatedAt = story.UpdatedAt
+	b.bundle.WeatherStory = &story
+	b.addSource(source)
+	return nil
+}
+
 func (b *bundleBuilder) addStub(sourceName string, message string) error {
 	source := forecast.Source{
 		Name:      sourceName,
@@ -307,6 +328,7 @@ type queryOptions struct {
 	precision bool
 	timezone  bool
 	allowNull bool
+	omitUnits bool
 }
 
 type envelope struct {
@@ -366,7 +388,9 @@ func (c *Client) endpointURL(endpoint string, opts queryOptions) *url.URL {
 	reqURL.Path = path.Join(c.baseURL.Path, endpoint)
 	query := reqURL.Query()
 	query.Set("format", c.format)
-	query.Set("units", c.units)
+	if !opts.omitUnits {
+		query.Set("units", c.units)
+	}
 	if opts.precision {
 		query.Set("precision", strconv.Itoa(c.precision))
 	}