feat(websocket): support user_*_changed events

Closes #1541.

Author: nlopes

CHANGELOG.md

@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- **RTM support for `user_status_changed`, `user_huddle_changed`, `user_profile_changed`
+  events** — these events are now mapped in `EventMapping` with dedicated structs
+  (`UserStatusChangedEvent`, `UserHuddleChangedEvent`, `UserProfileChangedEvent`).
+  Previously they triggered `UnmarshallingErrorEvent`. ([#1541])
+- **`CacheTS` and `EventTS` fields on `UserChangeEvent`** — these fields were sent by Slack
+  but silently dropped during unmarshalling.
 - **`workflows.featured` API support** — add, list, remove, and set featured workflows on
   channels via `WorkflowsFeaturedAdd`, `WorkflowsFeaturedList`, `WorkflowsFeaturedRemove`,
   and `WorkflowsFeaturedSet`
@@ -326,6 +332,7 @@ for details.
 [#1533]: https://github.com/slack-go/slack/pull/1533
 [#1534]: https://github.com/slack-go/slack/pull/1534
 [#1536]: https://github.com/slack-go/slack/pull/1536
+[#1541]: https://github.com/slack-go/slack/issues/1541
 
 [Unreleased]: https://github.com/slack-go/slack/compare/v0.20.0...HEAD
 [0.20.0]: https://github.com/slack-go/slack/compare/v0.19.0...v0.20.0

websocket_managed_conn.go

@@ -582,7 +582,10 @@ var EventMapping = map[string]interface{}{
 
 	"manual_presence_change": ManualPresenceChangeEvent{},
 
-	"user_change": UserChangeEvent{},
+	"user_change":          UserChangeEvent{},
+	"user_status_changed":  UserStatusChangedEvent{},
+	"user_huddle_changed":  UserHuddleChangedEvent{},
+	"user_profile_changed": UserProfileChangedEvent{},
 
 	"emoji_changed": EmojiChangedEvent{},
 

websocket_managed_conn_test.go

@@ -317,7 +317,7 @@ func TestRTMSingleConnect(t *testing.T) {
 }
 
 func TestRTMUnmappedError(t *testing.T) {
-	const unmappedEventName = "user_status_changed"
+	const unmappedEventName = "some_unknown_event"
 	// Set up the test server.
 	testServer := slacktest.NewTestServer()
 	go testServer.Start()

websocket_misc.go

@@ -71,8 +71,34 @@ type ManualPresenceChangeEvent struct {
 
 // UserChangeEvent represents the user change event
 type UserChangeEvent struct {
-	Type string `json:"type"`
-	User User   `json:"user"`
+	Type    string `json:"type"`
+	User    User   `json:"user"`
+	CacheTS int64  `json:"cache_ts"`
+	EventTS string `json:"event_ts"`
+}
+
+// UserStatusChangedEvent represents the user status changed event
+type UserStatusChangedEvent struct {
+	Type    string `json:"type"`
+	User    User   `json:"user"`
+	CacheTS int64  `json:"cache_ts"`
+	EventTS string `json:"event_ts"`
+}
+
+// UserHuddleChangedEvent represents the user huddle changed event
+type UserHuddleChangedEvent struct {
+	Type    string `json:"type"`
+	User    User   `json:"user"`
+	CacheTS int64  `json:"cache_ts"`
+	EventTS string `json:"event_ts"`
+}
+
+// UserProfileChangedEvent represents the user profile changed event
+type UserProfileChangedEvent struct {
+	Type    string `json:"type"`
+	User    User   `json:"user"`
+	CacheTS int64  `json:"cache_ts"`
+	EventTS string `json:"event_ts"`
 }
 
 // EmojiChangedEvent represents the emoji changed event