MM-53125 Add feature to convert group message to private channel (#24421)

* Added convert to channel menu item

* WIP

* refactored channel name input field and created conversion modal

* style

* style

* WIP

* wip

* Created API to fetch common teams of GM members

* Added UI for all members deactivated

* Fetched common teams in client

* WIP

* Added a required attribute to DropdownInput component

* Fixed a case with dropdown input required flag

* WIP

* API first draft

* Genetayed layers and mocks

* Fixed create channel bug

* WIP

* Added cache invalidation

* Calling API from client

* Updated API to accept name and display name as well

* WIP

* Moved converted GM to correct category

* Style fixes

* Added logic to move user to new team/channel after GM conversion

* Prevented guest user from performing action

* Added loading indicator

* Added smoother height transistion when loading finishes

* UI imporvements

* WIP

* Formatted GM conversion message on client side

* lint fix

* Moved convert option from sidebar menu to channel header menu

* Some cleanup

* Updated server layers

* Fixed i18n

* Fixed types

* Fix server i18n

* Fixed channel creation bug

* Added store test for GetCommonTeamIDsForMultipleUsers

* Server tests done

* Updated snapshots

* Updated layers

* lint fix

* Update tests

* For CI

* lint

* restored debug code

* Used user ID instead of username in channel conversion post

* WIP

* Review fixes

* LInt fixes

* Test fix

* WIP

* WIP

* WIP

* wip

* Review fixes, lots of them

* Review fix

* Disabled WIP test

* test

* Cleanup

* Test fix

* removed testing line

* Fixed incorrect default message

* Review fixes

* Fixes

* lint and i18n fix

* Setting category on server side

* updated i18n

* Updated tests

* Added tests

* Refs cleanup

* added test

---------

Co-authored-by: Harshil Sharma <harshilsharma@Harshils-MacBook-Pro.local>

server/public/model/channel.go

@@ -443,3 +443,10 @@ func GetGroupNameFromUserIds(userIds []string) string {
 
 	return hex.EncodeToString(h.Sum(nil))
 }
+
+type GroupMessageConversionRequestBody struct {
+	ChannelID   string `json:"channel_id"`
+	TeamID      string `json:"team_id"`
+	Name        string `json:"name"`
+	DisplayName string `json:"display_name"`
+}

server/public/model/post.go

@@ -45,6 +45,7 @@ const (
 	PostTypeChannelRestored        = "system_channel_restored"
 	PostTypeEphemeral              = "system_ephemeral"
 	PostTypeChangeChannelPrivacy   = "system_change_chan_privacy"
+	PostTypeGMConvertedToChannel   = "system_gm_to_channel"
 	PostTypeAddBotTeamsChannels    = "add_bot_teams_channels"
 	PostTypeSystemWarnMetricStatus = "warn_metric_status"
 	PostTypeMe                     = "me"
@@ -428,7 +429,8 @@ func (o *Post) IsValid(maxPostSize int) *AppError {
 		PostTypeAddBotTeamsChannels,
 		PostTypeSystemWarnMetricStatus,
 		PostTypeReminder,
-		PostTypeMe:
+		PostTypeMe,
+		PostTypeGMConvertedToChannel:
 	default:
 		if !strings.HasPrefix(o.Type, PostCustomTypePrefix) {
 			return NewAppError("Post.IsValid", "model.post.is_valid.type.app_error", nil, "id="+o.Type, http.StatusBadRequest)