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