package protocol import ( "context" "crypto/ecdsa" "errors" "go.uber.org/zap" "github.com/golang/protobuf/proto" "github.com/status-im/status-go/protocol/common" "github.com/status-im/status-go/protocol/protobuf" "github.com/status-im/status-go/protocol/requests" ) var ErrInvalidEditOrDeleteAuthor = errors.New("sender is not the author of the message") var ErrInvalidDeleteTypeAuthor = errors.New("message type cannot be deleted") var ErrInvalidEditContentType = errors.New("only text or emoji messages can be replaced") var ErrInvalidDeletePermission = errors.New("don't have enough permission to delete") func (m *Messenger) EditMessage(ctx context.Context, request *requests.EditMessage) (*MessengerResponse, error) { err := request.Validate() if err != nil { return nil, err } message, err := m.persistence.MessageByID(request.ID.String()) if err != nil { return nil, err } if message.From != common.PubkeyToHex(&m.identity.PublicKey) { return nil, ErrInvalidEditOrDeleteAuthor } if message.ContentType != protobuf.ChatMessage_TEXT_PLAIN && message.ContentType != protobuf.ChatMessage_EMOJI && message.ContentType != protobuf.ChatMessage_IMAGE { return nil, ErrInvalidEditContentType } // A valid added chat is required. chat, ok := m.allChats.Load(message.ChatId) if !ok { return nil, ErrChatNotFound } messages, err := m.getOtherMessagesInAlbum(message, message.LocalChatID) if err != nil { return nil, err } response := &MessengerResponse{} for _, message := range messages { //Add LinkPreviews only to first message if len(request.LinkPreviews) > 0 { message.LinkPreviews = request.LinkPreviews } if len(request.StatusLinkPreviews) > 0 { message.StatusLinkPreviews = request.StatusLinkPreviews } clock, _ := chat.NextClockAndTimestamp(m.getTimesource()) editMessage := NewEditMessage() editMessage.Text = request.Text editMessage.ContentType = request.ContentType editMessage.ChatId = message.ChatId editMessage.MessageId = message.ID editMessage.Clock = clock // We consider link previews non-critical data, so we do not want to block // messages from being sent. unfurledLinks, err := message.ConvertLinkPreviewsToProto() if err != nil { m.logger.Error("failed to convert link previews", zap.Error(err)) } else { editMessage.UnfurledLinks = unfurledLinks } unfurledStatusLinks, err := message.ConvertStatusLinkPreviewsToProto() if err != nil { m.logger.Error("failed to convert status link previews", zap.Error(err)) } else { editMessage.UnfurledStatusLinks = unfurledStatusLinks } err = m.applyEditMessage(editMessage.EditMessage, message) if err != nil { return nil, err } encodedMessage, err := m.encodeChatEntity(chat, editMessage) if err != nil { return nil, err } rawMessage := common.RawMessage{ LocalChatID: chat.ID, Payload: encodedMessage, MessageType: protobuf.ApplicationMetadataMessage_EDIT_MESSAGE, SkipGroupMessageWrap: true, ResendAutomatically: true, } _, err = m.dispatchMessage(ctx, rawMessage) if err != nil { return nil, err } if chat.LastMessage != nil && chat.LastMessage.ID == message.ID { chat.LastMessage = message err := m.saveChat(chat) if err != nil { return nil, err } } response.AddMessage(message) } // pull updated messages updatedMessages, err := m.persistence.MessagesByResponseTo(request.ID.String()) if err != nil { return nil, err } response.AddMessages(updatedMessages) m.prepareMessages(response.messages) response.AddChat(chat) return response, nil } func (m *Messenger) CanDeleteMessageForEveryoneInCommunity(communityID string, publicKey *ecdsa.PublicKey) bool { if communityID != "" { community, err := m.communitiesManager.GetByIDString(communityID) if err != nil { m.logger.Error("failed to find community", zap.String("communityID", communityID), zap.Error(err)) return false } return community.CanDeleteMessageForEveryone(publicKey) } return false } func (m *Messenger) CanDeleteMessageForEveryoneInPrivateGroupChat(chat *Chat, publicKey *ecdsa.PublicKey) bool { group, err := newProtocolGroupFromChat(chat) if err != nil { m.logger.Error("failed to find group", zap.String("chatID", chat.ID), zap.Error(err)) return false } admins := group.Admins() return stringSliceContains(admins, common.PubkeyToHex(publicKey)) } func (m *Messenger) DeleteMessageAndSend(ctx context.Context, messageID string) (*MessengerResponse, error) { message, err := m.persistence.MessageByID(messageID) if err != nil { return nil, err } // A valid added chat is required. chat, ok := m.allChats.Load(message.ChatId) if !ok { return nil, ErrChatNotFound } var canDeleteMessageForEveryone = false var deletedBy string if message.From != common.PubkeyToHex(&m.identity.PublicKey) { if message.MessageType == protobuf.MessageType_COMMUNITY_CHAT { communityID := chat.CommunityID canDeleteMessageForEveryone = m.CanDeleteMessageForEveryoneInCommunity(communityID, &m.identity.PublicKey) if !canDeleteMessageForEveryone { return nil, ErrInvalidDeletePermission } } else if message.MessageType == protobuf.MessageType_PRIVATE_GROUP { canDeleteMessageForEveryone = m.CanDeleteMessageForEveryoneInPrivateGroupChat(chat, &m.identity.PublicKey) if !canDeleteMessageForEveryone { return nil, ErrInvalidDeletePermission } } // only add DeletedBy when not deleted by message.From deletedBy = contactIDFromPublicKey(m.IdentityPublicKey()) if !canDeleteMessageForEveryone { return nil, ErrInvalidEditOrDeleteAuthor } } // Only certain types of messages can be deleted if message.ContentType != protobuf.ChatMessage_TEXT_PLAIN && message.ContentType != protobuf.ChatMessage_STICKER && message.ContentType != protobuf.ChatMessage_EMOJI && message.ContentType != protobuf.ChatMessage_IMAGE && message.ContentType != protobuf.ChatMessage_AUDIO { return nil, ErrInvalidDeleteTypeAuthor } messagesToDelete, err := m.getOtherMessagesInAlbum(message, message.ChatId) if err != nil { return nil, err } clock, _ := chat.NextClockAndTimestamp(m.getTimesource()) deleteMessage := NewDeleteMessage() deleteMessage.ChatId = message.ChatId deleteMessage.MessageId = messageID deleteMessage.Clock = clock deleteMessage.DeletedBy = deletedBy encodedMessage, err := m.encodeChatEntity(chat, deleteMessage) if err != nil { return nil, err } rawMessage := common.RawMessage{ LocalChatID: chat.ID, Payload: encodedMessage, MessageType: protobuf.ApplicationMetadataMessage_DELETE_MESSAGE, SkipGroupMessageWrap: true, ResendAutomatically: true, } _, err = m.dispatchMessage(ctx, rawMessage) if err != nil { return nil, err } response := &MessengerResponse{} for _, messageToDelete := range messagesToDelete { messageToDelete.Deleted = true messageToDelete.DeletedBy = deletedBy err = m.persistence.SaveMessages([]*common.Message{messageToDelete}) if err != nil { return nil, err } response.AddMessage(messageToDelete) response.AddRemovedMessage(&RemovedMessage{MessageID: messageToDelete.ID, ChatID: chat.ID, DeletedBy: deletedBy}) if chat.LastMessage != nil && chat.LastMessage.ID == messageToDelete.ID { chat.LastMessage = messageToDelete err = m.saveChat(chat) if err != nil { return nil, err } } // pull updated messages updatedMessages, err := m.persistence.MessagesByResponseTo(messageToDelete.ID) if err != nil { return nil, err } response.AddMessages(updatedMessages) m.prepareMessages(response.messages) } response.AddChat(chat) return response, nil } func (m *Messenger) DeleteMessageForMeAndSync(ctx context.Context, localChatID string, messageID string) (*MessengerResponse, error) { message, err := m.persistence.MessageByID(messageID) if err != nil { return nil, err } // A valid added chat is required. chat, ok := m.allChats.Load(localChatID) if !ok { return nil, ErrChatNotFound } // Only certain types of messages can be deleted if message.ContentType != protobuf.ChatMessage_TEXT_PLAIN && message.ContentType != protobuf.ChatMessage_STICKER && message.ContentType != protobuf.ChatMessage_EMOJI && message.ContentType != protobuf.ChatMessage_IMAGE && message.ContentType != protobuf.ChatMessage_AUDIO { return nil, ErrInvalidDeleteTypeAuthor } messagesToDelete, err := m.getOtherMessagesInAlbum(message, localChatID) if err != nil { return nil, err } response := &MessengerResponse{} for _, messageToDelete := range messagesToDelete { messageToDelete.DeletedForMe = true err = m.persistence.SaveMessages([]*common.Message{messageToDelete}) if err != nil { return nil, err } if chat.LastMessage != nil && chat.LastMessage.ID == messageToDelete.ID { chat.LastMessage = messageToDelete err = m.saveChat(chat) if err != nil { return nil, err } } response.AddMessage(messageToDelete) // pull updated messages updatedMessages, err := m.persistence.MessagesByResponseTo(messageToDelete.ID) if err != nil { return nil, err } response.AddMessages(updatedMessages) m.prepareMessages(response.messages) } response.AddChat(chat) err = m.withChatClock(func(chatID string, clock uint64) error { deletedForMeMessage := &protobuf.SyncDeleteForMeMessage{ MessageId: messageID, Clock: clock, } if m.hasPairedDevices() { encodedMessage, err2 := proto.Marshal(deletedForMeMessage) if err2 != nil { return err2 } rawMessage := common.RawMessage{ LocalChatID: chatID, Payload: encodedMessage, MessageType: protobuf.ApplicationMetadataMessage_SYNC_DELETE_FOR_ME_MESSAGE, ResendAutomatically: true, } _, err2 = m.dispatchMessage(ctx, rawMessage) return err2 } return m.persistence.SaveOrUpdateDeleteForMeMessage(deletedForMeMessage) }) if err != nil { return response, err } return response, nil } func (m *Messenger) applyEditMessage(editMessage *protobuf.EditMessage, message *common.Message) error { if err := ValidateText(editMessage.Text); err != nil { return err } message.Text = editMessage.Text message.EditedAt = editMessage.Clock message.UnfurledLinks = editMessage.UnfurledLinks message.UnfurledStatusLinks = editMessage.UnfurledStatusLinks if editMessage.ContentType != protobuf.ChatMessage_UNKNOWN_CONTENT_TYPE { message.ContentType = editMessage.ContentType } // Save original message as edit so we can retrieve history if message.EditedAt == 0 { originalEdit := NewEditMessage() originalEdit.Clock = message.Clock originalEdit.LocalChatID = message.LocalChatID originalEdit.MessageId = message.ID originalEdit.Text = message.Text originalEdit.ContentType = message.ContentType originalEdit.From = message.From originalEdit.UnfurledLinks = message.UnfurledLinks originalEdit.UnfurledStatusLinks = message.UnfurledStatusLinks err := m.persistence.SaveEdit(originalEdit) if err != nil { return err } } err := message.PrepareContent(common.PubkeyToHex(&m.identity.PublicKey)) if err != nil { return err } return m.persistence.SaveMessages([]*common.Message{message}) } func (m *Messenger) applyDeleteMessage(messageDeletes []*DeleteMessage, message *common.Message) error { if messageDeletes[0].From != message.From { return ErrInvalidEditOrDeleteAuthor } message.Deleted = true message.DeletedBy = messageDeletes[0].DeletedBy err := message.PrepareContent(common.PubkeyToHex(&m.identity.PublicKey)) if err != nil { return err } err = m.persistence.SaveMessages([]*common.Message{message}) if err != nil { return err } return nil } func (m *Messenger) applyDeleteForMeMessage(message *common.Message) error { message.DeletedForMe = true err := message.PrepareContent(m.myHexIdentity()) if err != nil { return err } err = m.persistence.SaveMessages([]*common.Message{message}) if err != nil { return err } return nil } func (m *Messenger) addContactRequestPropagatedState(message *common.Message) error { chat, ok := m.allChats.Load(message.LocalChatID) if !ok { return ErrChatNotFound } if !chat.OneToOne() { return nil } contact, err := m.BuildContact(&requests.BuildContact{PublicKey: chat.ID}) if err != nil { return err } message.ContactRequestPropagatedState = contact.ContactRequestPropagatedState() return nil } func (m *Messenger) SendOneToOneMessage(request *requests.SendOneToOneMessage) (*MessengerResponse, error) { if err := request.Validate(); err != nil { return nil, err } chatID, err := request.HexID() if err != nil { return nil, err } _, ok := m.allChats.Load(chatID) if !ok { // Only one to one chan be muted when it's not in the database publicKey, err := common.HexToPubkey(chatID) if err != nil { return nil, err } // Create a one to one chat chat := CreateOneToOneChat(chatID, publicKey, m.getTimesource()) err = m.initChatSyncFields(chat) if err != nil { return nil, err } err = m.saveChat(chat) if err != nil { return nil, err } } message := common.NewMessage() message.Text = request.Message message.ChatId = chatID message.ContentType = protobuf.ChatMessage_TEXT_PLAIN return m.sendChatMessage(context.Background(), message) } func (m *Messenger) SendGroupChatMessage(request *requests.SendGroupChatMessage) (*MessengerResponse, error) { if err := request.Validate(); err != nil { return nil, err } chatID := request.ID _, ok := m.allChats.Load(chatID) if !ok { return nil, ErrChatNotFound } message := common.NewMessage() message.Text = request.Message message.ChatId = chatID message.ContentType = protobuf.ChatMessage_TEXT_PLAIN return m.sendChatMessage(context.Background(), message) }