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status-go/protocol/common/message.go

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package common
import (
"crypto/ecdsa"
"encoding/base64"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"strings"
"unicode"
"unicode/utf8"
"github.com/golang/protobuf/proto"
"github.com/status-im/markdown"
"github.com/status-im/markdown/ast"
"github.com/status-im/status-go/eth-node/crypto"
"github.com/status-im/status-go/images"
"github.com/status-im/status-go/protocol/protobuf"
)
// QuotedMessage contains the original text of the message replied to
type QuotedMessage struct {
ID string `json:"id"`
ContentType int64 `json:"contentType"`
// From is a public key of the author of the message.
From string `json:"from"`
Text string `json:"text"`
ParsedText json.RawMessage `json:"parsedText,omitempty"`
// ImageLocalURL is the local url of the image
ImageLocalURL string `json:"image,omitempty"`
// AudioLocalURL is the local url of the audio
AudioLocalURL string `json:"audio,omitempty"`
HasSticker bool `json:"sticker,omitempty"`
// CommunityID is the id of the community advertised
CommunityID string `json:"communityId,omitempty"`
}
type CommandState int
const (
CommandStateRequestAddressForTransaction CommandState = iota + 1
CommandStateRequestAddressForTransactionDeclined
CommandStateRequestAddressForTransactionAccepted
CommandStateRequestTransaction
CommandStateRequestTransactionDeclined
CommandStateTransactionPending
CommandStateTransactionSent
)
type ContactRequestState int
const (
ContactRequestStatePending ContactRequestState = iota + 1
ContactRequestStateAccepted
ContactRequestStateDismissed
)
type ContactVerificationState int
const (
ContactVerificationStatePending ContactVerificationState = iota + 1
ContactVerificationStateAccepted
ContactVerificationStateDeclined
ContactVerificationStateTrusted
ContactVerificationStateUntrustworthy
ContactVerificationStateCanceled
)
const everyoneMentionTag = "0x00001"
type CommandParameters struct {
// ID is the ID of the initial message
ID string `json:"id"`
// From is the address we are sending the command from
From string `json:"from"`
// Address is the address sent with the command
Address string `json:"address"`
// Contract is the contract address for ERC20 tokens
Contract string `json:"contract"`
// Value is the value as a string sent
Value string `json:"value"`
// TransactionHash is the hash of the transaction
TransactionHash string `json:"transactionHash"`
// CommandState is the state of the command
CommandState CommandState `json:"commandState"`
// The Signature of the pk-bytes+transaction-hash from the wallet
// address originating
Signature []byte `json:"signature"`
}
// GapParameters is the From and To indicating the missing period in chat history
type GapParameters struct {
From uint32 `json:"from,omitempty"`
To uint32 `json:"to,omitempty"`
}
func (c *CommandParameters) IsTokenTransfer() bool {
return len(c.Contract) != 0
}
const (
OutgoingStatusSending = "sending"
OutgoingStatusSent = "sent"
OutgoingStatusDelivered = "delivered"
)
type Messages []*Message
func (m Messages) GetClock(i int) uint64 {
return m[i].Clock
}
// Message represents a message record in the database,
// more specifically in user_messages table.
type Message struct {
protobuf.ChatMessage
// ID calculated as keccak256(compressedAuthorPubKey, data) where data is unencrypted payload.
ID string `json:"id"`
// WhisperTimestamp is a timestamp of a Whisper envelope.
WhisperTimestamp uint64 `json:"whisperTimestamp"`
// From is a public key of the author of the message.
From string `json:"from"`
// Random 3 words name
Alias string `json:"alias"`
// Identicon of the author
Identicon string `json:"identicon"`
// The chat id to be stored locally
LocalChatID string `json:"localChatId"`
// Seen set to true when user have read this message already
Seen bool `json:"seen"`
OutgoingStatus string `json:"outgoingStatus,omitempty"`
QuotedMessage *QuotedMessage `json:"quotedMessage"`
// CommandParameters is the parameters sent with the message
CommandParameters *CommandParameters `json:"commandParameters"`
// GapParameters is the value from/to related to the gap
GapParameters *GapParameters `json:"gapParameters,omitempty"`
// Computed fields
// RTL is whether this is a right-to-left message (arabic/hebrew script etc)
RTL bool `json:"rtl"`
// ParsedText is the parsed markdown for displaying
ParsedText []byte `json:"parsedText,omitempty"`
// ParsedTextAst is the ast of the parsed text
ParsedTextAst *ast.Node `json:"-"`
// LineCount is the count of newlines in the message
LineCount int `json:"lineCount"`
// Base64Image is the converted base64 image
Base64Image string `json:"image,omitempty"`
// ImagePath is the path of the image to be sent
ImagePath string `json:"imagePath,omitempty"`
// Base64Audio is the converted base64 audio
Base64Audio string `json:"audio,omitempty"`
// AudioPath is the path of the audio to be sent
AudioPath string `json:"audioPath,omitempty"`
// ImageLocalURL is the local url of the image
ImageLocalURL string `json:"imageLocalUrl,omitempty"`
// AlbumID for a collage of images
AlbumID string `json:"albumId,omitempty"`
// AudioLocalURL is the local url of the audio
AudioLocalURL string `json:"audioLocalUrl,omitempty"`
// StickerLocalURL is the local url of the sticker
StickerLocalURL string `json:"stickerLocalUrl,omitempty"`
// CommunityID is the id of the community to advertise
CommunityID string `json:"communityId,omitempty"`
// Replace indicates that this is a replacement of a message
// that has been updated
Replace string `json:"replace,omitempty"`
New bool `json:"new,omitempty"`
SigPubKey *ecdsa.PublicKey `json:"-"`
// Mentions is an array of mentions for a given message
Mentions []string
// Mentioned is whether the user is mentioned in the message
Mentioned bool `json:"mentioned"`
// Replied is whether the user is replied to in the message
Replied bool `json:"replied"`
// Links is an array of links within given message
Links []string
// EditedAt indicates the clock value it was edited
EditedAt uint64 `json:"editedAt"`
// Deleted indicates if a message was deleted
Deleted bool `json:"deleted"`
DeletedForMe bool `json:"deletedForMe"`
// ContactRequestState is the state of the contact request message
ContactRequestState ContactRequestState `json:"contactRequestState,omitempty"`
// ContactVerificationState is the state of the identity verification process
ContactVerificationState ContactVerificationState `json:"contactVerificationState,omitempty"`
DiscordMessage *protobuf.DiscordMessage `json:"discordMessage,omitempty"`
}
func (m *Message) MarshalJSON() ([]byte, error) {
type StickerAlias struct {
Hash string `json:"hash"`
Pack int32 `json:"pack"`
URL string `json:"url"`
}
item := struct {
ID string `json:"id"`
WhisperTimestamp uint64 `json:"whisperTimestamp"`
From string `json:"from"`
Alias string `json:"alias"`
Identicon string `json:"identicon"`
Seen bool `json:"seen"`
OutgoingStatus string `json:"outgoingStatus,omitempty"`
QuotedMessage *QuotedMessage `json:"quotedMessage"`
RTL bool `json:"rtl"`
ParsedText json.RawMessage `json:"parsedText,omitempty"`
LineCount int `json:"lineCount"`
Text string `json:"text"`
ChatID string `json:"chatId"`
LocalChatID string `json:"localChatId"`
Clock uint64 `json:"clock"`
Replace string `json:"replace"`
ResponseTo string `json:"responseTo"`
New bool `json:"new,omitempty"`
EnsName string `json:"ensName"`
DisplayName string `json:"displayName"`
Image string `json:"image,omitempty"`
AlbumID string `json:"albumId,omitempty"`
Audio string `json:"audio,omitempty"`
AudioDurationMs uint64 `json:"audioDurationMs,omitempty"`
CommunityID string `json:"communityId,omitempty"`
Sticker *StickerAlias `json:"sticker,omitempty"`
CommandParameters *CommandParameters `json:"commandParameters,omitempty"`
GapParameters *GapParameters `json:"gapParameters,omitempty"`
Timestamp uint64 `json:"timestamp"`
ContentType protobuf.ChatMessage_ContentType `json:"contentType"`
MessageType protobuf.MessageType `json:"messageType"`
Mentions []string `json:"mentions,omitempty"`
Mentioned bool `json:"mentioned,omitempty"`
Replied bool `json:"replied,omitempty"`
Links []string `json:"links,omitempty"`
EditedAt uint64 `json:"editedAt,omitempty"`
Deleted bool `json:"deleted,omitempty"`
DeletedForMe bool `json:"deletedForMe,omitempty"`
ContactRequestState ContactRequestState `json:"contactRequestState,omitempty"`
ContactVerificationState ContactVerificationState `json:"contactVerificationState,omitempty"`
DiscordMessage *protobuf.DiscordMessage `json:"discordMessage,omitempty"`
}{
ID: m.ID,
WhisperTimestamp: m.WhisperTimestamp,
From: m.From,
Alias: m.Alias,
Identicon: m.Identicon,
Seen: m.Seen,
OutgoingStatus: m.OutgoingStatus,
QuotedMessage: m.QuotedMessage,
RTL: m.RTL,
ParsedText: m.ParsedText,
LineCount: m.LineCount,
Text: m.Text,
Replace: m.Replace,
ChatID: m.ChatId,
LocalChatID: m.LocalChatID,
Clock: m.Clock,
ResponseTo: m.ResponseTo,
New: m.New,
EnsName: m.EnsName,
DisplayName: m.DisplayName,
Image: m.ImageLocalURL,
AlbumID: m.AlbumID,
Audio: m.AudioLocalURL,
CommunityID: m.CommunityID,
Timestamp: m.Timestamp,
ContentType: m.ContentType,
Mentions: m.Mentions,
Mentioned: m.Mentioned,
Replied: m.Replied,
Links: m.Links,
MessageType: m.MessageType,
CommandParameters: m.CommandParameters,
GapParameters: m.GapParameters,
EditedAt: m.EditedAt,
Deleted: m.Deleted,
DeletedForMe: m.DeletedForMe,
ContactRequestState: m.ContactRequestState,
ContactVerificationState: m.ContactVerificationState,
}
if sticker := m.GetSticker(); sticker != nil {
item.Sticker = &StickerAlias{
Pack: sticker.Pack,
Hash: sticker.Hash,
URL: m.StickerLocalURL,
}
}
if audio := m.GetAudio(); audio != nil {
item.AudioDurationMs = audio.DurationMs
}
if discordMessage := m.GetDiscordMessage(); discordMessage != nil {
item.DiscordMessage = discordMessage
}
return json.Marshal(item)
}
func (m *Message) UnmarshalJSON(data []byte) error {
type Alias Message
aux := struct {
*Alias
ResponseTo string `json:"responseTo"`
EnsName string `json:"ensName"`
DisplayName string `json:"displayName"`
ChatID string `json:"chatId"`
Sticker *protobuf.StickerMessage `json:"sticker"`
AudioDurationMs uint64 `json:"audioDurationMs"`
ParsedText json.RawMessage `json:"parsedText"`
ContentType protobuf.ChatMessage_ContentType `json:"contentType"`
}{
Alias: (*Alias)(m),
}
if err := json.Unmarshal(data, &aux); err != nil {
return err
}
if aux.ContentType == protobuf.ChatMessage_STICKER {
m.Payload = &protobuf.ChatMessage_Sticker{Sticker: aux.Sticker}
}
if aux.ContentType == protobuf.ChatMessage_AUDIO {
m.Payload = &protobuf.ChatMessage_Audio{
Audio: &protobuf.AudioMessage{DurationMs: aux.AudioDurationMs},
}
}
m.ResponseTo = aux.ResponseTo
m.EnsName = aux.EnsName
m.DisplayName = aux.DisplayName
m.ChatId = aux.ChatID
m.ContentType = aux.ContentType
m.ParsedText = aux.ParsedText
return nil
}
// Check if the first character is Hebrew or Arabic or the RTL character
func isRTL(s string) bool {
first, _ := utf8.DecodeRuneInString(s)
return unicode.Is(unicode.Hebrew, first) ||
unicode.Is(unicode.Arabic, first) ||
// RTL character
first == '\u200f'
}
// parseImage check the message contains an image, and if so
// it creates the a base64 encoded version of it.
func (m *Message) parseImage() error {
if m.ContentType != protobuf.ChatMessage_IMAGE {
return nil
}
image := m.GetImage()
if image == nil {
return errors.New("image empty")
}
payload := image.Payload
e64 := base64.StdEncoding
maxEncLen := e64.EncodedLen(len(payload))
encBuf := make([]byte, maxEncLen)
e64.Encode(encBuf, payload)
mime, err := images.GetMimeType(image.Payload)
if err != nil {
return err
}
m.Base64Image = fmt.Sprintf("data:image/%s;base64,%s", mime, encBuf)
return nil
}
// parseAudio check the message contains an audio, and if so
// it creates a base64 encoded version of it.
func (m *Message) parseAudio() error {
if m.ContentType != protobuf.ChatMessage_AUDIO {
return nil
}
audio := m.GetAudio()
if audio == nil {
return errors.New("audio empty")
}
payload := audio.Payload
e64 := base64.StdEncoding
maxEncLen := e64.EncodedLen(len(payload))
encBuf := make([]byte, maxEncLen)
e64.Encode(encBuf, payload)
mime, err := getAudioMessageMIME(audio)
if err != nil {
return err
}
m.Base64Audio = fmt.Sprintf("data:audio/%s;base64,%s", mime, encBuf)
return nil
}
// implement interface of https://github.com/status-im/markdown/blob/b9fe921681227b1dace4b56364e15edb3b698308/ast/node.go#L701
type SimplifiedTextVisitor struct {
text string
canonicalNames map[string]string
}
func (v *SimplifiedTextVisitor) Visit(node ast.Node, entering bool) ast.WalkStatus {
// only on entering we fetch, otherwise we go on
if !entering {
return ast.GoToNext
}
switch n := node.(type) {
case *ast.Mention:
literal := string(n.Literal)
canonicalName, ok := v.canonicalNames[literal]
if ok {
v.text += canonicalName
} else {
v.text += literal
}
case *ast.Link:
destination := string(n.Destination)
v.text += destination
default:
var literal string
leaf := node.AsLeaf()
container := node.AsContainer()
if leaf != nil {
literal = string(leaf.Literal)
} else if container != nil {
literal = string(container.Literal)
}
v.text += literal
}
return ast.GoToNext
}
// implement interface of https://github.com/status-im/markdown/blob/b9fe921681227b1dace4b56364e15edb3b698308/ast/node.go#L701
type MentionsAndLinksVisitor struct {
identity string
mentioned bool
mentions []string
links []string
}
func (v *MentionsAndLinksVisitor) Visit(node ast.Node, entering bool) ast.WalkStatus {
// only on entering we fetch, otherwise we go on
if !entering {
return ast.GoToNext
}
switch n := node.(type) {
case *ast.Mention:
mention := string(n.Literal)
if mention == v.identity || mention == everyoneMentionTag {
v.mentioned = true
}
v.mentions = append(v.mentions, mention)
case *ast.Link:
v.links = append(v.links, string(n.Destination))
}
return ast.GoToNext
}
func runMentionsAndLinksVisitor(parsedText ast.Node, identity string) *MentionsAndLinksVisitor {
visitor := &MentionsAndLinksVisitor{identity: identity}
ast.Walk(parsedText, visitor)
return visitor
}
// PrepareContent return the parsed content of the message, the line-count and whether
// is a right-to-left message
func (m *Message) PrepareContent(identity string) error {
var parsedText ast.Node
switch m.ContentType {
case protobuf.ChatMessage_DISCORD_MESSAGE:
parsedText = markdown.Parse([]byte(m.GetDiscordMessage().Content), nil)
default:
parsedText = markdown.Parse([]byte(m.Text), nil)
}
visitor := runMentionsAndLinksVisitor(parsedText, identity)
m.Mentions = visitor.mentions
m.Links = visitor.links
// Leave it set if already set, as sometimes we might run this without
// an identity
if !m.Mentioned {
m.Mentioned = visitor.mentioned
}
jsonParsedText, err := json.Marshal(parsedText)
if err != nil {
return err
}
m.ParsedTextAst = &parsedText
m.ParsedText = jsonParsedText
m.LineCount = strings.Count(m.Text, "\n")
m.RTL = isRTL(m.Text)
if err := m.parseImage(); err != nil {
return err
}
return m.parseAudio()
}
// GetSimplifiedText returns a the text stripped of all the markdown and with mentions
// replaced by canonical names
func (m *Message) GetSimplifiedText(identity string, canonicalNames map[string]string) (string, error) {
if m.ContentType == protobuf.ChatMessage_AUDIO {
return "Audio", nil
}
if m.ContentType == protobuf.ChatMessage_STICKER {
return "Sticker", nil
}
if m.ContentType == protobuf.ChatMessage_IMAGE {
return "Image", nil
}
if m.ContentType == protobuf.ChatMessage_COMMUNITY {
return "Community", nil
}
if m.ContentType == protobuf.ChatMessage_SYSTEM_MESSAGE_CONTENT_PRIVATE_GROUP {
return "Group", nil
}
if m.ParsedTextAst == nil {
err := m.PrepareContent(identity)
if err != nil {
return "", err
}
}
visitor := &SimplifiedTextVisitor{canonicalNames: canonicalNames}
ast.Walk(*m.ParsedTextAst, visitor)
return visitor.text, nil
}
func getAudioMessageMIME(i *protobuf.AudioMessage) (string, error) {
switch i.Type {
case protobuf.AudioMessage_AAC:
return "aac", nil
case protobuf.AudioMessage_AMR:
return "amr", nil
}
return "", errors.New("audio format not supported")
}
// GetSigPubKey returns an ecdsa encoded public key
// this function is required to implement the ChatEntity interface
func (m Message) GetSigPubKey() *ecdsa.PublicKey {
return m.SigPubKey
}
// GetProtoBuf returns the struct's embedded protobuf struct
// this function is required to implement the ChatEntity interface
func (m *Message) GetProtobuf() proto.Message {
return &m.ChatMessage
}
// SetMessageType a setter for the MessageType field
// this function is required to implement the ChatEntity interface
func (m *Message) SetMessageType(messageType protobuf.MessageType) {
m.MessageType = messageType
}
// WrapGroupMessage indicates whether we should wrap this in membership information
func (m *Message) WrapGroupMessage() bool {
return true
}
// GetPublicKey attempts to return or recreate the *ecdsa.PublicKey of the Message sender.
// If the m.SigPubKey is set this will be returned
// If the m.From is present the string is decoded and unmarshalled into a *ecdsa.PublicKey, the m.SigPubKey is set and returned
// Else an error is thrown
// This function differs from GetSigPubKey() as this function may return an error
func (m *Message) GetSenderPubKey() (*ecdsa.PublicKey, error) {
// TODO requires tests
if m.SigPubKey != nil {
return m.SigPubKey, nil
}
if len(m.From) > 0 {
fromB, err := hex.DecodeString(m.From[2:])
if err != nil {
return nil, err
}
senderPubKey, err := crypto.UnmarshalPubkey(fromB)
if err != nil {
return nil, err
}
m.SigPubKey = senderPubKey
return senderPubKey, nil
}
return nil, errors.New("no Message.SigPubKey or Message.From set unable to get public key")
}
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