92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
package model
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import (
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"bytes"
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"strings"
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"time"
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"github.com/sjzar/chatlog/pkg/util/zstd"
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)
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// CREATE TABLE Msg_md5(talker)(
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// local_id INTEGER PRIMARY KEY AUTOINCREMENT,
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// server_id INTEGER,
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// local_type INTEGER,
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// sort_seq INTEGER,
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// real_sender_id INTEGER,
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// create_time INTEGER,
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// status INTEGER,
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// upload_status INTEGER,
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// download_status INTEGER,
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// server_seq INTEGER,
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// origin_source INTEGER,
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// source TEXT,
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// message_content TEXT,
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// compress_content TEXT,
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// packed_info_data BLOB,
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// WCDB_CT_message_content INTEGER DEFAULT NULL,
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// WCDB_CT_source INTEGER DEFAULT NULL
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// )
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type MessageV4 struct {
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SortSeq int64 `json:"sort_seq"` // 消息序号，10位时间戳 + 3位序号
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LocalType int `json:"local_type"` // 消息类型
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RealSenderID int `json:"real_sender_id"` // 发送人 ID，对应 Name2Id 表序号
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CreateTime int64 `json:"create_time"` // 消息创建时间，10位时间戳
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MessageContent []byte `json:"message_content"` // 消息内容，文字聊天内容 或 zstd 压缩内容
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PackedInfoData []byte `json:"packed_info_data"` // 额外数据，类似 proto，格式与 v3 有差异
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Status int `json:"status"` // 消息状态，2 是已发送，4 是已接收，可以用于判断 IsSender（猜测）
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// 非关键信息，后续有需要再加入
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// LocalID int `json:"local_id"`
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// ServerID int64 `json:"server_id"`
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// UploadStatus int `json:"upload_status"`
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// DownloadStatus int `json:"download_status"`
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// ServerSeq int `json:"server_seq"`
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// OriginSource int `json:"origin_source"`
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// Source string `json:"source"`
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// CompressContent string `json:"compress_content"`
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}
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func (m *MessageV4) Wrap(id2Name map[int]string, isChatRoom bool) *Message {
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_m := &Message{
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Sequence: m.SortSeq,
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CreateTime: time.Unix(m.CreateTime, 0),
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TalkerID: m.RealSenderID, // 依赖 Name2Id 表进行转换为 StrTalker
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CompressContent: m.PackedInfoData,
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Type: m.LocalType,
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Version: WeChatV4,
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}
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if name, ok := id2Name[m.RealSenderID]; ok {
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_m.Talker = name
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}
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if m.Status == 2 {
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_m.IsSender = 1
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}
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if _m.Type == 1 {
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_m.Content = string(m.MessageContent)
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} else {
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if bytes.HasPrefix(m.MessageContent, []byte{0x28, 0xb5, 0x2f, 0xfd}) {
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if b, err := zstd.Decompress(m.MessageContent); err == nil {
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_m.Content = string(b)
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}
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} else {
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_m.CompressContent = m.MessageContent
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}
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}
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if isChatRoom {
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_m.IsChatRoom = true
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split := strings.SplitN(_m.Content, ":\n", 2)
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if len(split) == 2 {
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_m.ChatRoomSender = split[0]
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_m.Content = split[1]
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}
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}
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return _m
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}
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