feat(template/test): add gitops API for previewing the specific file in git repository

api/http/handler/gitops/handler.go

@@ -0,0 +1,33 @@
+package gitops
+
+import (
+	"net/http"
+
+	"github.com/gorilla/mux"
+	httperror "github.com/portainer/libhttp/error"
+	portainer "github.com/portainer/portainer/api"
+	"github.com/portainer/portainer/api/dataservices"
+	"github.com/portainer/portainer/api/http/security"
+)
+
+// Handler is the HTTP handler used to handle git repo operation
+type Handler struct {
+	*mux.Router
+	dataStore   dataservices.DataStore
+	gitService  portainer.GitService
+	fileService portainer.FileService
+}
+
+func NewHandler(bouncer *security.RequestBouncer, dataStore dataservices.DataStore, gitService portainer.GitService, fileService portainer.FileService) *Handler {
+	h := &Handler{
+		Router:      mux.NewRouter(),
+		dataStore:   dataStore,
+		gitService:  gitService,
+		fileService: fileService,
+	}
+
+	h.Handle("/gitops/repo/file/preview",
+		bouncer.AuthenticatedAccess(httperror.LoggerHandler(h.gitOperationRepoFilePreview))).Methods(http.MethodPost)
+
+	return h
+}