weatherfeeder: split the former maximumdirect.net/weatherd project in two.

feedkit now contains a reusable core, while weatherfeeder is a concrete implementation that includes weather-specific functions.

internal/sources/nws/forecast.go

@@ -0,0 +1,51 @@
+package nws
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"gitea.maximumdirect.net/ejr/feedkit/config"
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+)
+
+type ForecastSource struct {
+	name      string
+	url       string
+	userAgent string
+}
+
+func NewForecastSource(cfg config.SourceConfig) (*ForecastSource, error) {
+	if strings.TrimSpace(cfg.Name) == "" {
+		return nil, fmt.Errorf("nws_forecast: name is required")
+	}
+	if cfg.Params == nil {
+		return nil, fmt.Errorf("nws_forecast %q: params are required (need params.url and params.user_agent)", cfg.Name)
+	}
+
+	url, ok := cfg.ParamString("url", "URL")
+	if !ok {
+		return nil, fmt.Errorf("nws_forecast %q: params.url is required", cfg.Name)
+	}
+
+	ua, ok := cfg.ParamString("user_agent", "userAgent")
+	if !ok {
+		return nil, fmt.Errorf("nws_forecast %q: params.user_agent is required", cfg.Name)
+	}
+
+	return &ForecastSource{
+		name:      cfg.Name,
+		url:       url,
+		userAgent: ua,
+	}, nil
+}
+
+func (s *ForecastSource) Name() string { return s.name }
+
+// Kind is used for routing/policy.
+func (s *ForecastSource) Kind() event.Kind { return event.Kind("forecast") }
+
+func (s *ForecastSource) Poll(ctx context.Context) ([]event.Event, error) {
+	_ = ctx
+	return nil, fmt.Errorf("nws.ForecastSource.Poll: TODO implement (url=%s)", s.url)
+}