feat: add /versions endpoint

Author: christophwitzko

internal/plugin/plugin.go

@@ -153,7 +153,7 @@ func (p *Plugin) Update(ctx context.Context, db *firestore.Client, ghClient *git
 	return err
 }
 
-func (p *Plugin) getVersions(ctx context.Context, db *firestore.Client) ([]string, error) {
+func (p *Plugin) GetVersions(ctx context.Context, db *firestore.Client) ([]string, error) {
 	versionRefs, err := p.getVersionsColRef(db).DocumentRefs(ctx).GetAll()
 	if err != nil {
 		return nil, err
@@ -195,7 +195,7 @@ func (p *Plugin) Get(ctx context.Context, db *firestore.Client) (*registry.Plugi
 	if err != nil {
 		return nil, fmt.Errorf("failed to get plugin: %w", err)
 	}
-	versions, err := p.getVersions(ctx, db)
+	versions, err := p.GetVersions(ctx, db)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get versions: %w", err)
 	}
@@ -234,7 +234,7 @@ func (p *Plugin) GetReleaseWithVersionConstraint(ctx context.Context, db *firest
 		return nil, fmt.Errorf("failed to parse version constraint: %w", err)
 	}
 
-	versions, err := p.getVersions(ctx, db)
+	versions, err := p.GetVersions(ctx, db)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get versions: %w", err)
 	}

internal/server/handlers.go

@@ -74,3 +74,20 @@ func (s *Server) getPlugin(w http.ResponseWriter, r *http.Request) {
 	s.setInCache(s.getCacheKeyFromRequest(r), res)
 	s.writeJSON(w, res)
 }
+
+func (s *Server) listPluginVersions(w http.ResponseWriter, r *http.Request) {
+	pluginName := chi.URLParam(r, "plugin")
+	p := config.Plugins.Find(pluginName)
+	if p == nil {
+		s.writeJSONError(w, r, 404, fmt.Errorf("plugin %s not found", pluginName))
+		return
+	}
+
+	versions, err := p.GetVersions(r.Context(), s.db)
+	if err != nil {
+		s.writeJSONError(w, r, http.StatusInternalServerError, err, "could not get plugin versions")
+		return
+	}
+	s.setInCache(s.getCacheKeyFromRequest(r), versions)
+	s.writeJSON(w, versions)
+}

internal/server/server.go

@@ -79,6 +79,7 @@ func New(log *logrus.Logger, db *firestore.Client, ghClient *github.Client, stor
 		r.With(server.cacheMiddleware).Group(func(r chi.Router) {
 			r.Get("/", server.listPlugins)
 			r.Get("/{plugin}", server.getPlugin)
+			r.Get("/{plugin}/versions", server.listPluginVersions)
 			r.Get("/{plugin}/versions/{version}", server.getPlugin)
 		})
 		r.Post("/_batch", server.batchGetPlugins)