Handle gif stickers

go.mod

@@ -34,4 +34,4 @@ require (
 	maunium.net/go/mauflag v1.0.0 // indirect
 )
 
-replace github.com/bwmarrin/discordgo => github.com/beeper/discordgo v0.0.0-20230223130830-7848603fe535
+replace github.com/bwmarrin/discordgo => github.com/beeper/discordgo v0.0.0-20230226184350-ef6bcfe94f07

go.sum

@@ -1,6 +1,6 @@
 github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
-github.com/beeper/discordgo v0.0.0-20230223130830-7848603fe535 h1:xBf8EQ7gMd01Gk9/e5dSrVyJsVkYgqk0Bih5RcRKCUs=
-github.com/beeper/discordgo v0.0.0-20230223130830-7848603fe535/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
+github.com/beeper/discordgo v0.0.0-20230226184350-ef6bcfe94f07 h1:YajAt8iJkBn4aavUuftybeXUaeN4p0DPCE3a4wxE2Oc=
+github.com/beeper/discordgo v0.0.0-20230226184350-ef6bcfe94f07/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
 github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=

portal.go

@@ -632,6 +632,10 @@ func (portal *Portal) handleDiscordSticker(intent *appservice.IntentAPI, sticker
 		mime = "image/apng"
 	case discordgo.StickerFormatTypeLottie:
 		mime = "application/json"
+	case discordgo.StickerFormatTypeGIF:
+		mime = "image/gif"
+	default:
+		portal.log.Warnfln("Unknown sticker format %d in %s", sticker.FormatType, sticker.ID)
 	}
 	content := &event.MessageEventContent{
 		Body: sticker.Name, // TODO find description from somewhere?