status-go/protocol/common/message.go

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package common
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import (
"crypto/ecdsa"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"strings"
"unicode"
"unicode/utf8"
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"github.com/golang/protobuf/proto"
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"github.com/status-im/markdown"
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"github.com/status-im/markdown/ast"
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"github.com/status-im/status-go/protocol/protobuf"
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)
// QuotedMessage contains the original text of the message replied to
type QuotedMessage struct {
// 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"`
// Base64Image is the converted base64 image
Base64Image string `json:"image,omitempty"`
// Base64Audio is the converted base64 audio
Base64Audio string `json:"audio,omitempty"`
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// AudioDurationMs is the audio duration in milliseconds
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AudioDurationMs uint64 `json:"audioDurationMs,omitempty"`
}
type CommandState int
const (
CommandStateRequestAddressForTransaction CommandState = iota + 1
CommandStateRequestAddressForTransactionDeclined
CommandStateRequestAddressForTransactionAccepted
CommandStateRequestTransaction
CommandStateRequestTransactionDeclined
CommandStateTransactionPending
CommandStateTransactionSent
)
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"`
}
func (c *CommandParameters) IsTokenTransfer() bool {
return len(c.Contract) != 0
}
const (
OutgoingStatusSending = "sending"
OutgoingStatusSent = "sent"
)
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// Message represents a message record in the database,
// more specifically in user_messages table.
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type Message struct {
protobuf.ChatMessage
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// 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"`
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// 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"`
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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"`
// 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"`
// 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"`
// Replace indicates that this is a replacement of a message
// that has been updated
Replace string `json:"replace,omitempty"`
SigPubKey *ecdsa.PublicKey `json:"-"`
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// Mentions is an array of mentions for a given message
Mentions []string
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// Links is an array of links within given message
Links []string
}
func (m *Message) MarshalJSON() ([]byte, error) {
type StickerAlias struct {
Hash string `json:"hash"`
Pack int32 `json:"pack"`
}
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"`
EnsName string `json:"ensName"`
Image string `json:"image,omitempty"`
Audio string `json:"audio,omitempty"`
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AudioDurationMs uint64 `json:"audioDurationMs,omitempty"`
Sticker *StickerAlias `json:"sticker"`
CommandParameters *CommandParameters `json:"commandParameters"`
Timestamp uint64 `json:"timestamp"`
ContentType protobuf.ChatMessage_ContentType `json:"contentType"`
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MessageType protobuf.MessageType `json:"messageType"`
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Mentions []string `json:"mentions,omitempty"`
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Links []string `json:"links,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,
EnsName: m.EnsName,
Image: m.Base64Image,
Audio: m.Base64Audio,
Timestamp: m.Timestamp,
ContentType: m.ContentType,
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Mentions: m.Mentions,
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Links: m.Links,
MessageType: m.MessageType,
CommandParameters: m.CommandParameters,
}
if sticker := m.GetSticker(); sticker != nil {
item.Sticker = &StickerAlias{
Pack: sticker.Pack,
Hash: sticker.Hash,
}
}
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if audio := m.GetAudio(); audio != nil {
item.AudioDurationMs = audio.DurationMs
}
return json.Marshal(item)
}
func (m *Message) UnmarshalJSON(data []byte) error {
type Alias Message
aux := struct {
*Alias
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ResponseTo string `json:"responseTo"`
EnsName string `json:"ensName"`
ChatID string `json:"chatId"`
Sticker *protobuf.StickerMessage `json:"sticker"`
AudioDurationMs uint64 `json:"audioDurationMs"`
ParsedText json.RawMessage `json:"parsedText"`
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ContentType protobuf.ChatMessage_ContentType `json:"contentType"`
}{
Alias: (*Alias)(m),
}
if err := json.Unmarshal(data, &aux); err != nil {
return err
}
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if aux.ContentType == protobuf.ChatMessage_STICKER {
m.Payload = &protobuf.ChatMessage_Sticker{Sticker: aux.Sticker}
}
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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.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 := getImageMessageMIME(image)
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
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type NodeVisitor struct {
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mentions []string
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links []string
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}
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func (v *NodeVisitor) Visit(node ast.Node, entering bool) ast.WalkStatus {
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// only on entering we fetch, otherwise we go on
if !entering {
return ast.GoToNext
}
switch n := node.(type) {
case *ast.Mention:
v.mentions = append(v.mentions, string(n.Literal))
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case *ast.Link:
v.links = append(v.links, string(n.Destination))
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}
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return ast.GoToNext
}
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func extractMentionsAndLinks(parsedText ast.Node) ([]string, []string) {
visitor := &NodeVisitor{}
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ast.Walk(parsedText, visitor)
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return visitor.mentions, visitor.links
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}
// PrepareContent return the parsed content of the message, the line-count and whether
// is a right-to-left message
func (m *Message) PrepareContent() error {
parsedText := markdown.Parse([]byte(m.Text), nil)
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m.Mentions, m.Links = extractMentionsAndLinks(parsedText)
jsonParsedText, err := json.Marshal(parsedText)
if err != nil {
return err
}
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()
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}
func getImageMessageMIME(i *protobuf.ImageMessage) (string, error) {
switch i.Type {
case protobuf.ImageMessage_PNG:
return "png", nil
case protobuf.ImageMessage_JPEG:
return "jpeg", nil
case protobuf.ImageMessage_WEBP:
return "webp", nil
case protobuf.ImageMessage_GIF:
return "gif", nil
}
return "", errors.New("image format not supported")
}
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
}