Import/Export backend prep

pkg/pmapi/clientmanager.go

@@ -347,6 +347,14 @@ func (cm *ClientManager) CheckConnection() error {
 	return nil
 }
 
+// CheckConnection returns an error if there is no internet connection.
+func CheckConnection() error {
+	client := &http.Client{Timeout: time.Second * 10}
+	retStatus := make(chan error)
+	checkConnection(client, "http://protonstatus.com/vpn_status", retStatus)
+	return <-retStatus
+}
+
 func checkConnection(client *http.Client, url string, errorChannel chan error) {
 	resp, err := client.Get(url)
 	if err != nil {

pkg/pmapi/import.go

@@ -95,6 +95,11 @@ type ImportMsgReq struct {
 	LabelIDs []string
 }
 
+func (req ImportMsgReq) String() string {
+	data, _ := json.Marshal(req)
+	return string(data)
+}
+
 // ImportRes is a response to an import request.
 type ImportRes struct {
 	Res