feat: add channel_unshared event

Author: nlopes

slackevents/inner_events.go

@@ -147,6 +147,15 @@ type ChannelRenameInfo struct {
 	Created int    `json:"created"`
 }
 
+// ChannelUnsharedEvent represents a channel has been unshared with an external workspace event
+type ChannelUnsharedEvent struct {
+	Type                      string `json:"type"`
+	PreviouslyConnectedTeamID string `json:"previously_connected_team_id"`
+	Channel                   string `json:"channel"`
+	IsExtShared               bool   `json:"is_ext_shared"`
+	EventTimestamp            string `json:"event_ts"`
+}
+
 // GroupDeletedEvent represents the Group deleted event
 type GroupDeletedEvent struct {
 	Type           string `json:"type"`
@@ -1170,6 +1179,8 @@ const (
 	ChannelArchive = EventsAPIType("channel_archive")
 	// ChannelUnarchive is sent when a channel is unarchived.
 	ChannelUnarchive = EventsAPIType("channel_unarchive")
+	// ChannelUnshared is sent when a channel is unshared.
+	ChannelUnshared = EventsAPIType("channel_unshared")
 	// ChannelLeft is sent when a channel is left.
 	ChannelLeft = EventsAPIType("channel_left")
 	// ChannelRename is sent when a channel is rename.
@@ -1327,6 +1338,7 @@ var EventsAPIInnerEventMapping = map[EventsAPIType]interface{}{
 	ChannelDeleted:                ChannelDeletedEvent{},
 	ChannelArchive:                ChannelArchiveEvent{},
 	ChannelUnarchive:              ChannelUnarchiveEvent{},
+	ChannelUnshared:               ChannelUnsharedEvent{},
 	ChannelLeft:                   ChannelLeftEvent{},
 	ChannelRename:                 ChannelRenameEvent{},
 	ChannelIDChanged:              ChannelIDChangedEvent{},

slackevents/inner_events_test.go

@@ -2502,6 +2502,37 @@ func TestChannelSharedEvent(t *testing.T) {
 	}
 }
 
+func TestChannelUnsharedEvent(t *testing.T) {
+	jsonStr := `{
+		"type": "channel_unshared",
+		"previously_connected_team_id": "E163Q94DX",
+		"channel": "C123ABC456",
+        "is_ext_shared": false,
+		"event_ts": "1561064063.001100"
+	}`
+
+	var event ChannelUnsharedEvent
+	if err := json.Unmarshal([]byte(jsonStr), &event); err != nil {
+		t.Errorf("Failed to unmarshal ChannelUnsharedEvent: %v", err)
+	}
+
+	if event.Type != "channel_unshared" {
+		t.Errorf("Expected type to be 'channel_unshared', got %s", event.Type)
+	}
+
+	if event.PreviouslyConnectedTeamID != "E163Q94DX" {
+		t.Errorf("Expected previously_connected_team_id to be 'E163Q94DX', got %s", event.PreviouslyConnectedTeamID)
+	}
+
+	if event.IsExtShared {
+		t.Errorf("Expected is_ext_shared to be false, got %t", event.IsExtShared)
+	}
+
+	if event.Channel != "C123ABC456" {
+		t.Fail()
+	}
+}
+
 func TestFileCreatedEvent(t *testing.T) {
 	jsonStr := `{
 		"type": "file_created",