Fix: Empty community tags in always empty slice, not nil (#4420)

protocol/communities/community.go

@@ -428,7 +428,7 @@ func (o *Community) TagsRaw() []string {
 }
 
 func (o *Community) TagsIndices() []uint32 {
-	var indices []uint32
+	indices := []uint32{}
 	for _, t := range o.config.CommunityDescription.Tags {
 		i := uint32(0)
 		for k := range requests.TagsEmojies {

protocol/messenger_share_urls.go

@@ -189,13 +189,20 @@ func parseCommunityURLWithData(data string, chatKey string) (*URLDataResponse, e
 		return nil, err
 	}
 
+	var tagIndices []uint32
+	if communityProto.TagIndices != nil {
+		tagIndices = communityProto.TagIndices
+	} else {
+		tagIndices = []uint32{}
+	}
+
 	return &URLDataResponse{
 		Community: &CommunityURLData{
 			DisplayName:  communityProto.DisplayName,
 			Description:  communityProto.Description,
 			MembersCount: communityProto.MembersCount,
 			Color:        communityProto.Color,
-			TagIndices:   communityProto.TagIndices,
+			TagIndices:   tagIndices,
 			CommunityID:  types.EncodeHex(communityID),
 		},
 		Shard: shard.FromProtobuff(urlDataProto.Shard),
@@ -351,13 +358,20 @@ func parseCommunityChannelURLWithData(data string, chatKey string) (*URLDataResp
 		return nil, err
 	}
 
+	var tagIndices []uint32
+	if channelProto.Community.TagIndices != nil {
+		tagIndices = channelProto.Community.TagIndices
+	} else {
+		tagIndices = []uint32{}
+	}
+
 	return &URLDataResponse{
 		Community: &CommunityURLData{
 			DisplayName:  channelProto.Community.DisplayName,
 			Description:  channelProto.Community.Description,
 			MembersCount: channelProto.Community.MembersCount,
 			Color:        channelProto.Community.Color,
-			TagIndices:   channelProto.Community.TagIndices,
+			TagIndices:   tagIndices,
 			CommunityID:  types.EncodeHex(communityID),
 		},
 		Channel: &CommunityChannelURLData{

protocol/messenger_share_urls_test.go

@@ -21,6 +21,8 @@ const (
 	userURLWithData              = "https://status.app/u/G10A4B0JdgwyRww90WXtnP1oNH1ZLQNM0yX0Ja9YyAMjrqSZIYINOHCbFhrnKRAcPGStPxCMJDSZlGCKzmZrJcimHY8BbcXlORrElv_BbQEegnMDPx1g9C5VVNl0fE4y#zQ3shwQPhRuDJSjVGVBnTjCdgXy5i9WQaeVPdGJD6yTarJQSj"
 	communityURL                 = "https://status.app/c#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11"
 	communityURLWithData         = "https://status.app/c/iyKACkQKB0Rvb2RsZXMSJ0NvbG9yaW5nIHRoZSB3b3JsZCB3aXRoIGpveSDigKIg4bSXIOKAohiYohsiByMxMzFEMkYqAwEhMwM=#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11"
+	communityURLWithDataNoTags   = "https://status.app/c/CxCACh8KBFBJR1MSDHdlIGxvdmUgcGlncxgBIgcjRDM0NEM1Aw==#zQ3shZp9gY1FXfYkcd3CMrFLHriHQfrXvpF9XbZMwJhTcZsq8"
+	communityURLWithDataWithTags = "https://status.app/c/CxKACiMKBFBJR1MSDHdlIGxvdmUgcGlncxgBIgcjRDM0NEM1KgIjHgM=#zQ3shZp9gY1FXfYkcd3CMrFLHriHQfrXvpF9XbZMwJhTcZsq8"
 	channelURL                   = "https://status.app/cc/003cdcd5-e065-48f9-b166-b1a94ac75a11#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11"
 	channelURLWithData           = "https://status.app/cc/G54AAKwObLdpiGjXnckYzRcOSq0QQAS_CURGfqVU42ceGHCObstUIknTTZDOKF3E8y2MSicncpO7fTskXnoACiPKeejvjtLTGWNxUhlT7fyQS7Jrr33UVHluxv_PLjV2ePGw5GQ33innzeK34pInIgUGs5RjdQifMVmURalxxQKwiuoY5zwIjixWWRHqjHM=#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11"
 )
@@ -261,6 +263,34 @@ func (s *MessengerShareUrlsSuite) TestParseCommunityURLWithData() {
 	s.Require().Equal([]uint32{1, 33, 51}, urlData.Community.TagIndices)
 }
 
+func (s *MessengerShareUrlsSuite) TestParseCommunityURLWithDataNoTags() {
+	urlData, err := ParseSharedURL(communityURLWithDataNoTags)
+	s.Require().NoError(err)
+	s.Require().NotNil(urlData)
+
+	s.Require().NotNil(urlData.Community)
+	s.Require().Equal("0x02b84843377a24ff498b6c37bd63e2b285c1ee2ccbab82d7a4afa25fff8c5076df", urlData.Community.CommunityID)
+	s.Require().Equal("PIGS", urlData.Community.DisplayName)
+	s.Require().Equal("we love pigs", urlData.Community.Description)
+	s.Require().Equal(uint32(0x1), urlData.Community.MembersCount)
+	s.Require().Equal("#D344C5", urlData.Community.Color)
+	s.Require().Equal([]uint32{}, urlData.Community.TagIndices)
+}
+
+func (s *MessengerShareUrlsSuite) TestParseCommunityURLWithDataWithTags() {
+	urlData, err := ParseSharedURL(communityURLWithDataWithTags)
+	s.Require().NoError(err)
+	s.Require().NotNil(urlData)
+
+	s.Require().NotNil(urlData.Community)
+	s.Require().Equal("0x02b84843377a24ff498b6c37bd63e2b285c1ee2ccbab82d7a4afa25fff8c5076df", urlData.Community.CommunityID)
+	s.Require().Equal("PIGS", urlData.Community.DisplayName)
+	s.Require().Equal("we love pigs", urlData.Community.Description)
+	s.Require().Equal(uint32(0x1), urlData.Community.MembersCount)
+	s.Require().Equal("#D344C5", urlData.Community.Color)
+	s.Require().Equal([]uint32{0x23, 0x1e}, urlData.Community.TagIndices)
+}
+
 func (s *MessengerShareUrlsSuite) TestShareAndParseCommunityURLWithData() {
 	community := s.createCommunity()