outpost: separate ak-api and proxy further for future outposts

outpost/pkg/proxy/api.go

@@ -0,0 +1,48 @@
+package proxy
+
+import (
+	"net/url"
+
+	"github.com/BeryJu/authentik/outpost/pkg/models"
+	log "github.com/sirupsen/logrus"
+)
+
+func (s *Server) Refresh() error {
+	providers, err := s.ak.Update()
+	if err != nil {
+		return err
+	}
+	if providers == nil {
+		s.logger.Debug("Providers have not changed, not updating")
+		return nil
+	}
+	bundles := s.bundleProviders(providers)
+	s.updateHTTPServer(bundles)
+	return nil
+}
+
+func (s *Server) bundleProviders(providers []*models.ProxyOutpostConfig) []*providerBundle {
+	bundles := make([]*providerBundle, len(providers))
+	for idx, provider := range providers {
+		externalHost, err := url.Parse(*provider.ExternalHost)
+		if err != nil {
+			log.WithError(err).Warning("Failed to parse URL, skipping provider")
+		}
+		bundles[idx] = &providerBundle{
+			s:    s,
+			Host: externalHost.Host,
+			log:  log.WithField("component", "proxy-bundle").WithField("provider", provider.Name),
+		}
+		bundles[idx].Build(provider)
+	}
+	return bundles
+}
+
+func (s *Server) updateHTTPServer(bundles []*providerBundle) {
+	newMap := make(map[string]*providerBundle)
+	for _, bundle := range bundles {
+		newMap[bundle.Host] = bundle
+	}
+	s.logger.Debug("Swapped maps")
+	s.Handlers = newMap
+}