GH-9636 plugins api GetUsersInChannelByStatus (#9645)

* adds GetUsersInChannelByStatus to plugin api with generated rpc code.

* fixed typo in comment with actual func name

* replaced Response model with AppError in output of GetUsersInChannelByStatus

* removed etag param from GetUsersInChannelByStatus since it is not used

* plugin api for GetUsersInChannelByStatus updated to take the limit, conforming to the app api.

* fixed an issue in my own logic on app/plugin integration.

* adds GetUsersInChannelByStatus to plugin api with generated rpc code.

* fixed typo in comment with actual func name

* replaced Response model with AppError in output of GetUsersInChannelByStatus

* removed etag param from GetUsersInChannelByStatus since it is not used

* plugin api for GetUsersInChannelByStatus updated to take the limit, conforming to the app api.

* fixed an issue in my own logic on app/plugin integration.

* GetUsersInChannelByStatus changed to more generic GetUsersInChannel which takes a sortBy parameter, allowing for more granular/extensible sorting functionality in the future

* GetUsersInChannel accepts sort parameter of 'username' and 'status'. Both values are consts in model pkg.

* Documents minimum server version for GetUsersInChannel.

* adds GetUsersInChannelByStatus to plugin api with generated rpc code.

* fixed typo in comment with actual func name

* replaced Response model with AppError in output of GetUsersInChannelByStatus

* removed etag param from GetUsersInChannelByStatus since it is not used

* plugin api for GetUsersInChannelByStatus updated to take the limit, conforming to the app api.

* fixed an issue in my own logic on app/plugin integration.

* adds GetUsersInChannelByStatus to plugin api with generated rpc code.

* Resolved conflict on rebase

* replaced Response model with AppError in output of GetUsersInChannelByStatus

* removed etag param from GetUsersInChannelByStatus since it is not used

* plugin api for GetUsersInChannelByStatus updated to take the limit, conforming to the app api.

* fixed an issue in my own logic on app/plugin integration.

* GetUsersInChannelByStatus changed to more generic GetUsersInChannel which takes a sortBy parameter, allowing for more granular/extensible sorting functionality in the future

* GetUsersInChannel accepts sort parameter of 'username' and 'status'. Both values are consts in model pkg.

* Documents minimum server version for GetUsersInChannel.

* replaces GetUsersInChannel from #9608 / #9643 with sortBy functionality

app/plugin_api.go

@@ -200,6 +200,18 @@ func (api *PluginAPI) UpdateUserStatus(userId, status string) (*model.Status, *m
 
 	return api.app.GetStatus(userId)
 }
+
+func (api *PluginAPI) GetUsersInChannel(channelId, sortBy string, page, perPage int) ([]*model.User, *model.AppError) {
+	switch sortBy {
+	case model.CHANNEL_SORT_BY_USERNAME:
+		return api.app.GetUsersInChannel(channelId, page*perPage, perPage)
+	case model.CHANNEL_SORT_BY_STATUS:
+		return api.app.GetUsersInChannelByStatus(channelId, page*perPage, perPage)
+	default:
+		return nil, model.NewAppError("GetUsersInChannel", "plugin.api.get_users_in_channel", nil, "invalid sort option", http.StatusBadRequest)
+	}
+}
+
 func (api *PluginAPI) GetLDAPUserAttributes(userId string, attributes []string) (map[string]string, *model.AppError) {
 	if api.app.Ldap == nil {
 		return nil, model.NewAppError("GetLdapUserAttributes", "ent.ldap.disabled.app_error", nil, "", http.StatusNotImplemented)
@@ -298,10 +310,6 @@ func (api *PluginAPI) DeleteChannelMember(channelId, userId string) *model.AppEr
 	return api.app.LeaveChannel(channelId, userId)
 }
 
-func (api *PluginAPI) GetUsersInChannel(channelId string, page int, perPage int) ([]*model.User, *model.AppError) {
-	return api.app.GetUsersInChannel(channelId, page*perPage, perPage)
-}
-
 func (api *PluginAPI) CreatePost(post *model.Post) (*model.Post, *model.AppError) {
 	return api.app.CreatePostMissingChannel(post, true)
 }