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chatlog/internal/model/message.go
2025-03-28 16:48:49 +08:00

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package model
import (
"path/filepath"
"strings"
"time"
"github.com/sjzar/chatlog/internal/model/wxproto"
"github.com/sjzar/chatlog/pkg/util/lz4"
"google.golang.org/protobuf/proto"
)
const (
// Source
WeChatV3 = "wechatv3"
WeChatV4 = "wechatv4"
WeChatDarwinV3 = "wechatdarwinv3"
)
type Message struct {
Sequence int64 `json:"sequence"` // 消息序号10位时间戳 + 3位序号
CreateTime time.Time `json:"createTime"` // 消息创建时间10位时间戳
TalkerID int `json:"talkerID"` // 聊天对象Name2ID 表序号,索引值
Talker string `json:"talker"` // 聊天对象,微信 ID or 群 ID
IsSender int `json:"isSender"` // 是否为发送消息0 接收消息1 发送消息
Type int64 `json:"type"` // 消息类型
SubType int `json:"subType"` // 消息子类型
Content string `json:"content"` // 消息内容,文字聊天内容 或 XML
CompressContent []byte `json:"compressContent"` // 非文字聊天内容,如图片、语音、视频等
IsChatRoom bool `json:"isChatRoom"` // 是否为群聊消息
ChatRoomSender string `json:"chatRoomSender"` // 群聊消息发送人
// Fill Info
// 从联系人等信息中填充
DisplayName string `json:"-"` // 显示名称
ChatRoomName string `json:"-"` // 群聊名称
MediaMessage *MediaMessage `json:"-"` // 多媒体消息
Version string `json:"-"` // 消息版本,内部判断
}
// CREATE TABLE MSG (
// localId INTEGER PRIMARY KEY AUTOINCREMENT,
// TalkerId INT DEFAULT 0,
// MsgSvrID INT,
// Type INT,
// SubType INT,
// IsSender INT,
// CreateTime INT,
// Sequence INT DEFAULT 0,
// StatusEx INT DEFAULT 0,
// FlagEx INT,
// Status INT,
// MsgServerSeq INT,
// MsgSequence INT,
// StrTalker TEXT,
// StrContent TEXT,
// DisplayContent TEXT,
// Reserved0 INT DEFAULT 0,
// Reserved1 INT DEFAULT 0,
// Reserved2 INT DEFAULT 0,
// Reserved3 INT DEFAULT 0,
// Reserved4 TEXT,
// Reserved5 TEXT,
// Reserved6 TEXT,
// CompressContent BLOB,
// BytesExtra BLOB,
// BytesTrans BLOB
// )
type MessageV3 struct {
Sequence int64 `json:"Sequence"` // 消息序号10位时间戳 + 3位序号
CreateTime int64 `json:"CreateTime"` // 消息创建时间10位时间戳
TalkerID int `json:"TalkerId"` // 聊天对象Name2ID 表序号,索引值
StrTalker string `json:"StrTalker"` // 聊天对象,微信 ID or 群 ID
IsSender int `json:"IsSender"` // 是否为发送消息0 接收消息1 发送消息
Type int64 `json:"Type"` // 消息类型
SubType int `json:"SubType"` // 消息子类型
StrContent string `json:"StrContent"` // 消息内容,文字聊天内容 或 XML
CompressContent []byte `json:"CompressContent"` // 非文字聊天内容,如图片、语音、视频等
BytesExtra []byte `json:"BytesExtra"` // protobuf 额外数据,记录群聊发送人等信息
// 非关键信息,后续有需要再加入
// LocalID int64 `json:"localId"`
// MsgSvrID int64 `json:"MsgSvrID"`
// StatusEx int `json:"StatusEx"`
// FlagEx int `json:"FlagEx"`
// Status int `json:"Status"`
// MsgServerSeq int64 `json:"MsgServerSeq"`
// MsgSequence int64 `json:"MsgSequence"`
// DisplayContent string `json:"DisplayContent"`
// Reserved0 int `json:"Reserved0"`
// Reserved1 int `json:"Reserved1"`
// Reserved2 int `json:"Reserved2"`
// Reserved3 int `json:"Reserved3"`
// Reserved4 string `json:"Reserved4"`
// Reserved5 string `json:"Reserved5"`
// Reserved6 string `json:"Reserved6"`
// BytesTrans []byte `json:"BytesTrans"`
}
func (m *MessageV3) Wrap() *Message {
_m := &Message{
Sequence: m.Sequence,
CreateTime: time.Unix(m.CreateTime, 0),
TalkerID: m.TalkerID,
Talker: m.StrTalker,
IsSender: m.IsSender,
Type: m.Type,
SubType: m.SubType,
Content: m.StrContent,
CompressContent: m.CompressContent,
Version: WeChatV3,
}
_m.IsChatRoom = strings.HasSuffix(_m.Talker, "@chatroom")
if _m.Type == 49 {
b, err := lz4.Decompress(m.CompressContent)
if err == nil {
_m.Content = string(b)
}
}
if _m.Type != 1 {
mediaMessage, err := NewMediaMessage(_m.Type, _m.Content)
if err == nil {
_m.MediaMessage = mediaMessage
}
}
if len(m.BytesExtra) != 0 {
if bytesExtra := ParseBytesExtra(m.BytesExtra); bytesExtra != nil {
if _m.IsChatRoom {
_m.ChatRoomSender = bytesExtra[1]
}
// FIXME xml 中的 md5 数据无法匹配到 hardlink 记录,所以直接用 proto 数据
if _m.Type == 43 {
path := bytesExtra[4]
parts := strings.Split(filepath.ToSlash(path), "/")
if len(parts) > 1 {
path = strings.Join(parts[1:], "/")
}
_m.MediaMessage.MediaPath = path
}
}
}
return _m
}
// ParseBytesExtra 解析额外数据
// 按需解析
func ParseBytesExtra(b []byte) map[int]string {
var pbMsg wxproto.BytesExtra
if err := proto.Unmarshal(b, &pbMsg); err != nil {
return nil
}
if pbMsg.Items == nil {
return nil
}
ret := make(map[int]string, len(pbMsg.Items))
for _, item := range pbMsg.Items {
ret[int(item.Type)] = item.Value
}
return ret
}
func (m *Message) PlainText(showChatRoom bool, host string) string {
buf := strings.Builder{}
talker := m.Talker
if m.IsSender == 1 {
talker = "我"
} else if m.IsChatRoom {
talker = m.ChatRoomSender
}
if m.DisplayName != "" {
buf.WriteString(m.DisplayName)
buf.WriteString("(")
buf.WriteString(talker)
buf.WriteString(")")
} else {
buf.WriteString(talker)
}
buf.WriteString(" ")
if m.IsChatRoom && showChatRoom {
buf.WriteString("[")
if m.ChatRoomName != "" {
buf.WriteString(m.ChatRoomName)
buf.WriteString("(")
buf.WriteString(m.Talker)
buf.WriteString(")")
} else {
buf.WriteString(m.Talker)
}
buf.WriteString("] ")
}
buf.WriteString(m.CreateTime.Format("2006-01-02 15:04:05"))
buf.WriteString("\n")
if m.MediaMessage != nil {
m.MediaMessage.SetHost(host)
buf.WriteString(m.MediaMessage.String())
} else {
buf.WriteString(m.Content)
}
buf.WriteString("\n")
return buf.String()
}