MM-31401 Add Shared flag to Channels table (#16568)

* add Shared flag to Channels table

model/channel.go

@@ -51,6 +51,7 @@ type Channel struct {
 	SchemeId         *string                `json:"scheme_id"`
 	Props            map[string]interface{} `json:"props" db:"-"`
 	GroupConstrained *bool                  `json:"group_constrained"`
+	Shared           *bool                  `json:"shared"`
 }
 
 type ChannelWithTeamData struct {
@@ -313,6 +314,10 @@ func (o *Channel) IsGroupConstrained() bool {
 	return o.GroupConstrained != nil && *o.GroupConstrained
 }
 
+func (o *Channel) IsShared() bool {
+	return o.Shared != nil && *o.Shared
+}
+
 func (o *Channel) GetOtherUserIdForDM(userId string) string {
 	if o.Type != CHANNEL_DIRECT {
 		return ""

store/sqlstore/upgrade.go

@@ -956,6 +956,7 @@ func upgradeDatabaseToVersion531(sqlStore *SqlStore) {
 	// if shouldPerformUpgrade(sqlStore, VERSION_5_30_0, VERSION_5_31_0) {
 	// allow 10 files per post
 	sqlStore.AlterColumnTypeIfExists("Posts", "FileIds", "text", "varchar(300)")
+	sqlStore.CreateColumnIfNotExistsNoDefault("Channels", "Shared", "tinyint(1)", "boolean")
 	// saveSchemaVersion(sqlStore, VERSION_5_31_0)
 	// }
 }