Update go-pluggable

vendor/github.com/mudler/go-pluggable/events.go

@@ -0,0 +1,60 @@
+// Copyright © 2020 Ettore Di Giacinto <mudler@mocaccino.org>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see <http://www.gnu.org/licenses/>.
+
+package pluggable
+
+import "encoding/json"
+
+// EventType describes an event type
+type EventType string
+
+// Event describes the event structure.
+// Contains a Name field and a Data field which
+// is marshalled in JSON
+type Event struct {
+	Name EventType `json:"name"`
+	Data string    `json:"data"`
+}
+
+// EventResponse describes the event response structure
+// It represent the JSON response from plugins
+type EventResponse struct {
+	State string `json:"state"`
+	Data  string `json:"data"`
+	Error string `json:"error"`
+}
+
+// JSON returns the stringified JSON of the Event
+func (e Event) JSON() (string, error) {
+	dat, err := json.Marshal(e)
+	return string(dat), err
+}
+
+// Unmarshal decodes the json payload in the given parameteer
+func (r EventResponse) Unmarshal(i interface{}) error {
+	return json.Unmarshal([]byte(r.Data), i)
+}
+
+// Errored returns true if the response contains an error
+func (r EventResponse) Errored() bool {
+	return len(r.Error) != 0
+}
+
+// NewEvent retuns a new event which can be used for publishing
+// the obj gets automatically serialized in json.
+func NewEvent(name EventType, obj interface{}) (*Event, error) {
+	dat, err := json.Marshal(obj)
+	return &Event{Name: name, Data: string(dat)}, err
+}