Added new endpoints under /forecast/narrative

internal/adapters/inbound/httpapi/forecast_endpoint.go

@@ -1,4 +1,4 @@
-// forecast_endpoint.go defines the /forecast/hourly endpoint behavior.
+// forecast_endpoint.go defines forecast endpoint behavior.
 // Layer: adapters/inbound/httpapi forecast route.
 package httpapi
 
@@ -24,19 +24,43 @@ const (
 var forecastNow = time.Now
 
 func forecastDefinitions(svc Service) []endpoint.Definition {
+	out := make([]endpoint.Definition, 0, 6)
+	out = append(out, forecastDefinitionSet(
+		"/forecast/hourly",
+		"forecast_hourly.txt.tmpl",
+		svc.LatestHourlyForecast,
+	)...)
+	out = append(out, forecastDefinitionSet(
+		"/forecast/narrative",
+		"forecast_narrative.txt.tmpl",
+		svc.LatestNarrativeForecast,
+	)...)
+	return out
+}
+
+func forecastDefinitionSet(
+	basePath string,
+	templateName string,
+	fetch func(context.Context) (*model.WeatherForecastRun, error),
+) []endpoint.Definition {
 	return []endpoint.Definition{
-		forecastDefinition(svc, "/forecast/hourly", forecastDaySliceAll),
-		forecastDefinition(svc, "/forecast/hourly/today", forecastDaySliceToday),
-		forecastDefinition(svc, "/forecast/hourly/tomorrow", forecastDaySliceTomorrow),
+		forecastDefinition(basePath, forecastDaySliceAll, templateName, fetch),
+		forecastDefinition(basePath+"/today", forecastDaySliceToday, templateName, fetch),
+		forecastDefinition(basePath+"/tomorrow", forecastDaySliceTomorrow, templateName, fetch),
 	}
 }
 
-func forecastDefinition(svc Service, path string, daySlice forecastDaySlice) endpoint.Definition {
+func forecastDefinition(
+	path string,
+	daySlice forecastDaySlice,
+	templateName string,
+	fetch func(context.Context) (*model.WeatherForecastRun, error),
+) endpoint.Definition {
 	return endpoint.GET(
 		path,
 		bindForecastPrecisionQuery,
 		func(ctx context.Context, req precisionQueryRequest) (any, error) {
-			run, err := svc.LatestHourlyForecast(ctx)
+			run, err := fetch(ctx)
 			if err != nil {
 				return nil, err
 			}
@@ -48,7 +72,7 @@ func forecastDefinition(svc Service, path string, daySlice forecastDaySlice) end
 			return response.Envelope{Data: presenter.ForecastPayload(run, req.Units, req.Precision, req.Timezone)}, nil
 		},
 		endpoint.WithProduces(render.FormatJSON, render.FormatXML, render.FormatText),
-		endpoint.WithTemplate("forecast_hourly.txt.tmpl"),
+		endpoint.WithTemplate(templateName),
 	)
 }