add api to convert a channel from public to private and restrict that to system_admin (#8655)

app/channel.go

@@ -817,34 +817,6 @@ func (a *App) PostUpdateChannelDisplayNameMessage(userId string, channel *model.
 	return nil
 }
 
-func (a *App) PostConvertChannelToPrivate(userId string, channel *model.Channel) *model.AppError {
-	uc := a.Srv.Store.User().Get(userId)
-
-	if uresult := <-uc; uresult.Err != nil {
-		return model.NewAppError("PostConvertChannelToPrivate", "api.channel.post_convert_channel_to_private.retrieve_user.error", nil, uresult.Err.Error(), http.StatusBadRequest)
-	} else {
-		user := uresult.Data.(*model.User)
-
-		message := fmt.Sprintf(utils.T("api.channel.post_convert_channel_to_private.updated_from"), user.Username)
-
-		post := &model.Post{
-			ChannelId: channel.Id,
-			Message:   message,
-			Type:      model.POST_CONVERT_CHANNEL,
-			UserId:    userId,
-			Props: model.StringInterface{
-				"username": user.Username,
-			},
-		}
-
-		if _, err := a.CreatePost(post, channel, false); err != nil {
-			return model.NewAppError("PostConvertChannelToPrivate", "api.channel.post_convert_channel_to_private.create_post.error", nil, err.Error(), http.StatusInternalServerError)
-		}
-	}
-
-	return nil
-}
-
 func (a *App) GetChannel(channelId string) (*model.Channel, *model.AppError) {
 	if result := <-a.Srv.Store.Channel().Get(channelId, true); result.Err != nil && result.Err.Id == "store.sql_channel.get.existing.app_error" {
 		result.Err.StatusCode = http.StatusNotFound