125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
package model
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import (
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"fmt"
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"path/filepath"
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"strings"
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"time"
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"github.com/sjzar/chatlog/internal/model/wxproto"
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"github.com/sjzar/chatlog/pkg/util/lz4"
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"google.golang.org/protobuf/proto"
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)
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// CREATE TABLE MSG (
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// localId INTEGER PRIMARY KEY AUTOINCREMENT,
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// TalkerId INT DEFAULT 0,
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// MsgSvrID INT,
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// Type INT,
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// SubType INT,
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// IsSender INT,
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// CreateTime INT,
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// Sequence INT DEFAULT 0,
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// StatusEx INT DEFAULT 0,
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// FlagEx INT,
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// Status INT,
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// MsgServerSeq INT,
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// MsgSequence INT,
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// StrTalker TEXT,
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// StrContent TEXT,
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// DisplayContent TEXT,
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// Reserved0 INT DEFAULT 0,
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// Reserved1 INT DEFAULT 0,
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// Reserved2 INT DEFAULT 0,
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// Reserved3 INT DEFAULT 0,
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// Reserved4 TEXT,
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// Reserved5 TEXT,
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// Reserved6 TEXT,
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// CompressContent BLOB,
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// BytesExtra BLOB,
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// BytesTrans BLOB
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// )
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type MessageV3 struct {
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MsgSvrID int64 `json:"MsgSvrID"` // 消息 ID
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Sequence int64 `json:"Sequence"` // 消息序号，10位时间戳 + 3位序号
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CreateTime int64 `json:"CreateTime"` // 消息创建时间，10位时间戳
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StrTalker string `json:"StrTalker"` // 聊天对象，微信 ID or 群 ID
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IsSender int `json:"IsSender"` // 是否为发送消息，0 接收消息，1 发送消息
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Type int64 `json:"Type"` // 消息类型
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SubType int `json:"SubType"` // 消息子类型
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StrContent string `json:"StrContent"` // 消息内容，文字聊天内容 或 XML
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CompressContent []byte `json:"CompressContent"` // 非文字聊天内容，如图片、语音、视频等
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BytesExtra []byte `json:"BytesExtra"` // protobuf 额外数据，记录群聊发送人等信息
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}
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func (m *MessageV3) Wrap() *Message {
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_m := &Message{
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Seq: m.Sequence,
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Time: time.Unix(m.CreateTime, 0),
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Talker: m.StrTalker,
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IsChatRoom: strings.HasSuffix(m.StrTalker, "@chatroom"),
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IsSelf: m.IsSender == 1,
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Type: m.Type,
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SubType: int64(m.SubType),
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Content: m.StrContent,
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Version: WeChatV3,
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}
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if !_m.IsChatRoom && !_m.IsSelf {
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_m.Sender = m.StrTalker
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}
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if _m.Type == 49 {
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b, err := lz4.Decompress(m.CompressContent)
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if err == nil {
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_m.Content = string(b)
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}
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}
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_m.ParseMediaInfo(_m.Content)
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// 语音消息
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if _m.Type == 34 {
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_m.Contents["voice"] = fmt.Sprint(m.MsgSvrID)
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}
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if len(m.BytesExtra) != 0 {
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if bytesExtra := ParseBytesExtra(m.BytesExtra); bytesExtra != nil {
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if _m.IsChatRoom {
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_m.Sender = bytesExtra[1]
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}
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// FIXME xml 中的 md5 数据无法匹配到 hardlink 记录，所以直接用 proto 数据
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if _m.Type == 43 {
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path := bytesExtra[4]
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parts := strings.Split(filepath.ToSlash(path), "/")
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if len(parts) > 1 {
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path = strings.Join(parts[1:], "/")
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}
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_m.Contents["path"] = path
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}
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}
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}
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return _m
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}
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// ParseBytesExtra 解析额外数据
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// 按需解析
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func ParseBytesExtra(b []byte) map[int]string {
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var pbMsg wxproto.BytesExtra
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if err := proto.Unmarshal(b, &pbMsg); err != nil {
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return nil
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}
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if pbMsg.Items == nil {
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return nil
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}
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ret := make(map[int]string, len(pbMsg.Items))
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for _, item := range pbMsg.Items {
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ret[int(item.Type)] = item.Value
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}
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return ret
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}
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