714 lines
17 KiB
Go
714 lines
17 KiB
Go
package v4
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import (
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"context"
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"crypto/md5"
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"database/sql"
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"encoding/hex"
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"fmt"
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"sort"
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"strings"
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"time"
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_ "github.com/mattn/go-sqlite3"
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"github.com/rs/zerolog/log"
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"github.com/sjzar/chatlog/internal/errors"
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"github.com/sjzar/chatlog/internal/model"
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"github.com/sjzar/chatlog/pkg/util"
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)
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const (
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MessageFilePattern = "^message_([0-9]?[0-9])?\\.db$"
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ContactFilePattern = "^contact\\.db$"
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SessionFilePattern = "^session\\.db$"
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MediaFilePattern = "^hardlink\\.db$"
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)
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// MessageDBInfo 存储消息数据库的信息
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type MessageDBInfo struct {
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FilePath string
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StartTime time.Time
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EndTime time.Time
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}
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type DataSource struct {
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path string
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messageDbs map[string]*sql.DB
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contactDb *sql.DB
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sessionDb *sql.DB
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mediaDb *sql.DB
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// 消息数据库信息
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messageFiles []MessageDBInfo
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}
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func New(path string) (*DataSource, error) {
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ds := &DataSource{
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path: path,
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messageDbs: make(map[string]*sql.DB),
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messageFiles: make([]MessageDBInfo, 0),
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}
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if err := ds.initMessageDbs(path); err != nil {
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return nil, errors.DBInitFailed(err)
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}
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if err := ds.initContactDb(path); err != nil {
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return nil, errors.DBInitFailed(err)
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}
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if err := ds.initSessionDb(path); err != nil {
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return nil, errors.DBInitFailed(err)
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}
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if err := ds.initMediaDb(path); err != nil {
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return nil, errors.DBInitFailed(err)
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}
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return ds, nil
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}
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func (ds *DataSource) initMessageDbs(path string) error {
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// 查找所有消息数据库文件
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files, err := util.FindFilesWithPatterns(path, MessageFilePattern, true)
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if err != nil {
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return errors.DBFileNotFound(path, MessageFilePattern, err)
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}
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if len(files) == 0 {
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return errors.DBFileNotFound(path, MessageFilePattern, nil)
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}
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// 处理每个数据库文件
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for _, filePath := range files {
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// 连接数据库
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db, err := sql.Open("sqlite3", filePath)
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if err != nil {
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log.Err(err).Msgf("连接数据库 %s 失败", filePath)
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continue
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}
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// 获取 Timestamp 表中的开始时间
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var startTime time.Time
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var timestamp int64
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row := db.QueryRow("SELECT timestamp FROM Timestamp LIMIT 1")
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if err := row.Scan(×tamp); err != nil {
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log.Err(err).Msgf("获取数据库 %s 的时间戳失败", filePath)
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db.Close()
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continue
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}
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startTime = time.Unix(timestamp, 0)
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// 保存数据库信息
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ds.messageFiles = append(ds.messageFiles, MessageDBInfo{
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FilePath: filePath,
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StartTime: startTime,
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})
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// 保存数据库连接
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ds.messageDbs[filePath] = db
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}
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// 按照 StartTime 排序数据库文件
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sort.Slice(ds.messageFiles, func(i, j int) bool {
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return ds.messageFiles[i].StartTime.Before(ds.messageFiles[j].StartTime)
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})
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// 设置结束时间
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for i := range ds.messageFiles {
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if i == len(ds.messageFiles)-1 {
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ds.messageFiles[i].EndTime = time.Now()
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} else {
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ds.messageFiles[i].EndTime = ds.messageFiles[i+1].StartTime
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}
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}
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return nil
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}
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func (ds *DataSource) initContactDb(path string) error {
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files, err := util.FindFilesWithPatterns(path, ContactFilePattern, true)
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if err != nil {
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return errors.DBFileNotFound(path, ContactFilePattern, err)
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}
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if len(files) == 0 {
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return errors.DBFileNotFound(path, ContactFilePattern, nil)
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}
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ds.contactDb, err = sql.Open("sqlite3", files[0])
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if err != nil {
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return errors.DBConnectFailed(files[0], err)
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}
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return nil
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}
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func (ds *DataSource) initSessionDb(path string) error {
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files, err := util.FindFilesWithPatterns(path, SessionFilePattern, true)
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if err != nil {
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return errors.DBFileNotFound(path, SessionFilePattern, err)
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}
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if len(files) == 0 {
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return errors.DBFileNotFound(path, SessionFilePattern, nil)
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}
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ds.sessionDb, err = sql.Open("sqlite3", files[0])
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if err != nil {
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return errors.DBConnectFailed(files[0], err)
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}
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return nil
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}
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func (ds *DataSource) initMediaDb(path string) error {
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files, err := util.FindFilesWithPatterns(path, MediaFilePattern, true)
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if err != nil {
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return errors.DBFileNotFound(path, MediaFilePattern, err)
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}
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if len(files) == 0 {
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return errors.DBFileNotFound(path, MediaFilePattern, nil)
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}
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ds.mediaDb, err = sql.Open("sqlite3", files[0])
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if err != nil {
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return errors.DBConnectFailed(files[0], err)
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}
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return nil
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}
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// getDBInfosForTimeRange 获取时间范围内的数据库信息
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func (ds *DataSource) getDBInfosForTimeRange(startTime, endTime time.Time) []MessageDBInfo {
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var dbs []MessageDBInfo
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for _, info := range ds.messageFiles {
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if info.StartTime.Before(endTime) && info.EndTime.After(startTime) {
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dbs = append(dbs, info)
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}
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}
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return dbs
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}
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func (ds *DataSource) GetMessages(ctx context.Context, startTime, endTime time.Time, talker string, limit, offset int) ([]*model.Message, error) {
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if talker == "" {
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return nil, errors.ErrTalkerEmpty
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}
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// 找到时间范围内的数据库文件
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dbInfos := ds.getDBInfosForTimeRange(startTime, endTime)
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if len(dbInfos) == 0 {
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return nil, errors.TimeRangeNotFound(startTime, endTime)
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}
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if len(dbInfos) == 1 {
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// LIMIT 和 OFFSET 逻辑在单文件情况下可以直接在 SQL 里处理
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return ds.getMessagesSingleFile(ctx, dbInfos[0], startTime, endTime, talker, limit, offset)
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}
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// 从每个相关数据库中查询消息
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totalMessages := []*model.Message{}
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for _, dbInfo := range dbInfos {
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// 检查上下文是否已取消
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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db, ok := ds.messageDbs[dbInfo.FilePath]
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if !ok {
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log.Error().Msgf("数据库 %s 未打开", dbInfo.FilePath)
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continue
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}
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messages, err := ds.getMessagesFromDB(ctx, db, dbInfo, startTime, endTime, talker)
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if err != nil {
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log.Err(err).Msgf("从数据库 %s 获取消息失败", dbInfo.FilePath)
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continue
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}
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totalMessages = append(totalMessages, messages...)
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if limit+offset > 0 && len(totalMessages) >= limit+offset {
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break
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}
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}
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// 对所有消息按时间排序
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sort.Slice(totalMessages, func(i, j int) bool {
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return totalMessages[i].Seq < totalMessages[j].Seq
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})
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// 处理分页
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if limit > 0 {
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if offset >= len(totalMessages) {
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return []*model.Message{}, nil
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}
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end := offset + limit
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if end > len(totalMessages) {
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end = len(totalMessages)
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}
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return totalMessages[offset:end], nil
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}
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return totalMessages, nil
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}
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// getMessagesSingleFile 从单个数据库文件获取消息
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func (ds *DataSource) getMessagesSingleFile(ctx context.Context, dbInfo MessageDBInfo, startTime, endTime time.Time, talker string, limit, offset int) ([]*model.Message, error) {
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db, ok := ds.messageDbs[dbInfo.FilePath]
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if !ok {
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return nil, errors.DBConnectFailed(dbInfo.FilePath, nil)
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}
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// 构建表名
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_talkerMd5Bytes := md5.Sum([]byte(talker))
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talkerMd5 := hex.EncodeToString(_talkerMd5Bytes[:])
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tableName := "Msg_" + talkerMd5
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// 构建查询条件
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conditions := []string{"create_time >= ? AND create_time <= ?"}
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args := []interface{}{startTime.Unix(), endTime.Unix()}
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query := fmt.Sprintf(`
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SELECT m.sort_seq, m.local_type, n.user_name, m.create_time, m.message_content, m.packed_info_data, m.status
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FROM %s m
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LEFT JOIN Name2Id n ON m.real_sender_id = n.rowid
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WHERE %s
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ORDER BY m.sort_seq ASC
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`, tableName, strings.Join(conditions, " AND "))
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if limit > 0 {
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query += fmt.Sprintf(" LIMIT %d", limit)
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if offset > 0 {
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query += fmt.Sprintf(" OFFSET %d", offset)
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}
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}
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// 执行查询
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rows, err := db.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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// 处理查询结果
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messages := []*model.Message{}
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for rows.Next() {
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var msg model.MessageV4
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err := rows.Scan(
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&msg.SortSeq,
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&msg.LocalType,
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&msg.UserName,
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&msg.CreateTime,
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&msg.MessageContent,
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&msg.PackedInfoData,
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&msg.Status,
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)
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if err != nil {
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return nil, errors.ScanRowFailed(err)
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}
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messages = append(messages, msg.Wrap(talker))
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}
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return messages, nil
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}
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// getMessagesFromDB 从数据库获取消息
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func (ds *DataSource) getMessagesFromDB(ctx context.Context, db *sql.DB, dbInfo MessageDBInfo, startTime, endTime time.Time, talker string) ([]*model.Message, error) {
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// 构建表名
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_talkerMd5Bytes := md5.Sum([]byte(talker))
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talkerMd5 := hex.EncodeToString(_talkerMd5Bytes[:])
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tableName := "Msg_" + talkerMd5
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// 检查表是否存在
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var exists bool
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err := db.QueryRowContext(ctx,
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"SELECT 1 FROM sqlite_master WHERE type='table' AND name=?",
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tableName).Scan(&exists)
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if err != nil {
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if err == sql.ErrNoRows {
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// 表不存在，返回空结果
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return []*model.Message{}, nil
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}
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return nil, errors.QueryFailed("", err)
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}
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// 构建查询条件
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conditions := []string{"create_time >= ? AND create_time <= ?"}
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args := []interface{}{startTime.Unix(), endTime.Unix()}
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query := fmt.Sprintf(`
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SELECT m.sort_seq, m.local_type, n.user_name, m.create_time, m.message_content, m.packed_info_data, m.status
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FROM %s m
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LEFT JOIN Name2Id n ON m.real_sender_id = n.rowid
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WHERE %s
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ORDER BY m.sort_seq ASC
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`, tableName, strings.Join(conditions, " AND "))
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// 执行查询
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rows, err := db.QueryContext(ctx, query, args...)
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if err != nil {
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// 如果表不存在，SQLite 会返回错误
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if strings.Contains(err.Error(), "no such table") {
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return []*model.Message{}, nil
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}
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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// 处理查询结果
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messages := []*model.Message{}
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for rows.Next() {
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var msg model.MessageV4
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err := rows.Scan(
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&msg.SortSeq,
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&msg.LocalType,
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&msg.UserName,
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&msg.CreateTime,
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&msg.MessageContent,
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&msg.PackedInfoData,
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&msg.Status,
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)
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if err != nil {
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return nil, errors.ScanRowFailed(err)
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}
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messages = append(messages, msg.Wrap(talker))
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}
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return messages, nil
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}
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// 联系人
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func (ds *DataSource) GetContacts(ctx context.Context, key string, limit, offset int) ([]*model.Contact, error) {
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var query string
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var args []interface{}
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if key != "" {
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// 按照关键字查询
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query = `SELECT username, local_type, alias, remark, nick_name
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FROM contact
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WHERE username = ? OR alias = ? OR remark = ? OR nick_name = ?`
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args = []interface{}{key, key, key, key}
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} else {
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// 查询所有联系人
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query = `SELECT username, local_type, alias, remark, nick_name FROM contact`
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}
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// 添加排序、分页
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query += ` ORDER BY username`
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if limit > 0 {
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query += fmt.Sprintf(" LIMIT %d", limit)
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if offset > 0 {
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query += fmt.Sprintf(" OFFSET %d", offset)
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}
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}
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// 执行查询
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rows, err := ds.contactDb.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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contacts := []*model.Contact{}
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for rows.Next() {
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var contactV4 model.ContactV4
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err := rows.Scan(
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&contactV4.UserName,
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&contactV4.LocalType,
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&contactV4.Alias,
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&contactV4.Remark,
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&contactV4.NickName,
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)
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if err != nil {
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return nil, errors.ScanRowFailed(err)
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}
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contacts = append(contacts, contactV4.Wrap())
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}
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return contacts, nil
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}
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// 群聊
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func (ds *DataSource) GetChatRooms(ctx context.Context, key string, limit, offset int) ([]*model.ChatRoom, error) {
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var query string
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var args []interface{}
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if key != "" {
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// 按照关键字查询
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query = `SELECT username, owner, ext_buffer FROM chat_room WHERE username = ?`
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args = []interface{}{key}
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// 执行查询
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rows, err := ds.contactDb.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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chatRooms := []*model.ChatRoom{}
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for rows.Next() {
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var chatRoomV4 model.ChatRoomV4
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err := rows.Scan(
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&chatRoomV4.UserName,
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&chatRoomV4.Owner,
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&chatRoomV4.ExtBuffer,
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)
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if err != nil {
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return nil, errors.ScanRowFailed(err)
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}
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chatRooms = append(chatRooms, chatRoomV4.Wrap())
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}
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// 如果没有找到群聊，尝试通过联系人查找
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if len(chatRooms) == 0 {
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contacts, err := ds.GetContacts(ctx, key, 1, 0)
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if err == nil && len(contacts) > 0 && strings.HasSuffix(contacts[0].UserName, "@chatroom") {
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// 再次尝试通过用户名查找群聊
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rows, err := ds.contactDb.QueryContext(ctx,
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`SELECT username, owner, ext_buffer FROM chat_room WHERE username = ?`,
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contacts[0].UserName)
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if err != nil {
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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for rows.Next() {
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var chatRoomV4 model.ChatRoomV4
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err := rows.Scan(
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&chatRoomV4.UserName,
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&chatRoomV4.Owner,
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&chatRoomV4.ExtBuffer,
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)
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if err != nil {
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return nil, errors.ScanRowFailed(err)
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}
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chatRooms = append(chatRooms, chatRoomV4.Wrap())
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}
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// 如果群聊记录不存在，但联系人记录存在，创建一个模拟的群聊对象
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if len(chatRooms) == 0 {
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chatRooms = append(chatRooms, &model.ChatRoom{
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Name: contacts[0].UserName,
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Users: make([]model.ChatRoomUser, 0),
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User2DisplayName: make(map[string]string),
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})
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}
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}
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}
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return chatRooms, nil
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} else {
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// 查询所有群聊
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query = `SELECT username, owner, ext_buffer FROM chat_room`
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// 添加排序、分页
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query += ` ORDER BY username`
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if limit > 0 {
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query += fmt.Sprintf(" LIMIT %d", limit)
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if offset > 0 {
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query += fmt.Sprintf(" OFFSET %d", offset)
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}
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}
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// 执行查询
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rows, err := ds.contactDb.QueryContext(ctx, query, args...)
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if err != nil {
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return nil, errors.QueryFailed(query, err)
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}
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defer rows.Close()
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chatRooms := []*model.ChatRoom{}
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for rows.Next() {
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var chatRoomV4 model.ChatRoomV4
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err := rows.Scan(
|
||
&chatRoomV4.UserName,
|
||
&chatRoomV4.Owner,
|
||
&chatRoomV4.ExtBuffer,
|
||
)
|
||
|
||
if err != nil {
|
||
return nil, errors.ScanRowFailed(err)
|
||
}
|
||
|
||
chatRooms = append(chatRooms, chatRoomV4.Wrap())
|
||
}
|
||
|
||
return chatRooms, nil
|
||
}
|
||
}
|
||
|
||
// 最近会话
|
||
func (ds *DataSource) GetSessions(ctx context.Context, key string, limit, offset int) ([]*model.Session, error) {
|
||
var query string
|
||
var args []interface{}
|
||
|
||
if key != "" {
|
||
// 按照关键字查询
|
||
query = `SELECT username, summary, last_timestamp, last_msg_sender, last_sender_display_name
|
||
FROM SessionTable
|
||
WHERE username = ? OR last_sender_display_name = ?
|
||
ORDER BY sort_timestamp DESC`
|
||
args = []interface{}{key, key}
|
||
} else {
|
||
// 查询所有会话
|
||
query = `SELECT username, summary, last_timestamp, last_msg_sender, last_sender_display_name
|
||
FROM SessionTable
|
||
ORDER BY sort_timestamp DESC`
|
||
}
|
||
|
||
// 添加分页
|
||
if limit > 0 {
|
||
query += fmt.Sprintf(" LIMIT %d", limit)
|
||
if offset > 0 {
|
||
query += fmt.Sprintf(" OFFSET %d", offset)
|
||
}
|
||
}
|
||
|
||
// 执行查询
|
||
rows, err := ds.sessionDb.QueryContext(ctx, query, args...)
|
||
if err != nil {
|
||
return nil, errors.QueryFailed(query, err)
|
||
}
|
||
defer rows.Close()
|
||
|
||
sessions := []*model.Session{}
|
||
for rows.Next() {
|
||
var sessionV4 model.SessionV4
|
||
err := rows.Scan(
|
||
&sessionV4.Username,
|
||
&sessionV4.Summary,
|
||
&sessionV4.LastTimestamp,
|
||
&sessionV4.LastMsgSender,
|
||
&sessionV4.LastSenderDisplayName,
|
||
)
|
||
|
||
if err != nil {
|
||
return nil, errors.ScanRowFailed(err)
|
||
}
|
||
|
||
sessions = append(sessions, sessionV4.Wrap())
|
||
}
|
||
|
||
return sessions, nil
|
||
}
|
||
|
||
func (ds *DataSource) GetMedia(ctx context.Context, _type string, key string) (*model.Media, error) {
|
||
if key == "" {
|
||
return nil, errors.ErrKeyEmpty
|
||
}
|
||
|
||
if len(key) != 32 {
|
||
return nil, errors.ErrKeyLengthMust32
|
||
}
|
||
|
||
var table string
|
||
switch _type {
|
||
case "image":
|
||
table = "image_hardlink_info_v3"
|
||
case "video":
|
||
table = "video_hardlink_info_v3"
|
||
case "file":
|
||
table = "file_hardlink_info_v3"
|
||
default:
|
||
return nil, errors.MediaTypeUnsupported(_type)
|
||
}
|
||
|
||
query := fmt.Sprintf(`
|
||
SELECT
|
||
f.md5,
|
||
f.file_name,
|
||
f.file_size,
|
||
f.modify_time,
|
||
IFNULL(d1.username,""),
|
||
IFNULL(d2.username,"")
|
||
FROM
|
||
%s f
|
||
LEFT JOIN
|
||
dir2id d1 ON d1.rowid = f.dir1
|
||
LEFT JOIN
|
||
dir2id d2 ON d2.rowid = f.dir2
|
||
`, table)
|
||
query += " WHERE f.md5 = ? OR f.file_name LIKE ? || '%'"
|
||
args := []interface{}{key, key}
|
||
|
||
rows, err := ds.mediaDb.QueryContext(ctx, query, args...)
|
||
if err != nil {
|
||
return nil, errors.QueryFailed(query, err)
|
||
}
|
||
defer rows.Close()
|
||
|
||
var media *model.Media
|
||
for rows.Next() {
|
||
var mediaV4 model.MediaV4
|
||
err := rows.Scan(
|
||
&mediaV4.Key,
|
||
&mediaV4.Name,
|
||
&mediaV4.Size,
|
||
&mediaV4.ModifyTime,
|
||
&mediaV4.Dir1,
|
||
&mediaV4.Dir2,
|
||
)
|
||
if err != nil {
|
||
return nil, errors.ScanRowFailed(err)
|
||
}
|
||
mediaV4.Type = _type
|
||
media = mediaV4.Wrap()
|
||
|
||
// 跳过缩略图
|
||
if _type == "image" && !strings.Contains(media.Name, "_t") {
|
||
break
|
||
}
|
||
}
|
||
|
||
if media == nil {
|
||
return nil, errors.ErrMediaNotFound
|
||
}
|
||
|
||
return media, nil
|
||
}
|
||
|
||
func (ds *DataSource) Close() error {
|
||
var errs []error
|
||
|
||
// 关闭消息数据库连接
|
||
for _, db := range ds.messageDbs {
|
||
if err := db.Close(); err != nil {
|
||
errs = append(errs, err)
|
||
}
|
||
}
|
||
|
||
// 关闭联系人数据库连接
|
||
if ds.contactDb != nil {
|
||
if err := ds.contactDb.Close(); err != nil {
|
||
errs = append(errs, err)
|
||
}
|
||
}
|
||
|
||
// 关闭会话数据库连接
|
||
if ds.sessionDb != nil {
|
||
if err := ds.sessionDb.Close(); err != nil {
|
||
errs = append(errs, err)
|
||
}
|
||
}
|
||
|
||
if ds.mediaDb != nil {
|
||
if err := ds.mediaDb.Close(); err != nil {
|
||
errs = append(errs, err)
|
||
}
|
||
}
|
||
|
||
if len(errs) > 0 {
|
||
return errors.DBCloseFailed(errs[0])
|
||
}
|
||
|
||
return nil
|
||
}
|