message search (#60)
This commit is contained in:
Sarv
@@ -2,9 +2,9 @@ package windowsv3
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import (
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"context"
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"database/sql"
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"encoding/hex"
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"fmt"
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"regexp"
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"sort"
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"strings"
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"time"
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@@ -16,6 +16,7 @@ import (
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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/internal/wechatdb/datasource/dbm"
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"github.com/sjzar/chatlog/pkg/util"
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)
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const (
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@@ -221,21 +222,38 @@ func (ds *DataSource) getDBInfosForTimeRange(startTime, endTime time.Time) []Mes
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return dbs
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}
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// GetMessages 实现 DataSource 接口的 GetMessages 方法
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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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func (ds *DataSource) GetMessages(ctx context.Context, startTime, endTime time.Time, talker string, sender string, keyword 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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// 解析talker参数，支持多个talker（以英文逗号分隔）
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talkers := util.Str2List(talker, ",")
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if len(talkers) == 0 {
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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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// 解析sender参数，支持多个发送者（以英文逗号分隔）
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senders := util.Str2List(sender, ",")
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// 预编译正则表达式（如果有keyword）
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var regex *regexp.Regexp
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if keyword != "" {
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var err error
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regex, err = regexp.Compile(keyword)
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if err != nil {
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return nil, errors.QueryFailed("invalid regex pattern", err)
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}
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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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filteredMessages := []*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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@@ -249,172 +267,137 @@ func (ds *DataSource) GetMessages(ctx context.Context, startTime, endTime time.T
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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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// 对每个talker进行查询
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for _, talkerItem := range talkers {
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// 构建查询条件
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conditions := []string{"Sequence >= ? AND Sequence <= ?"}
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args := []interface{}{startTime.Unix() * 1000, endTime.Unix() * 1000}
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totalMessages = append(totalMessages, messages...)
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// 添加talker条件
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talkerID, ok := dbInfo.TalkerMap[talkerItem]
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if ok {
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conditions = append(conditions, "TalkerId = ?")
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args = append(args, talkerID)
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} else {
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conditions = append(conditions, "StrTalker = ?")
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args = append(args, talkerItem)
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}
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if limit+offset > 0 && len(totalMessages) >= limit+offset {
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break
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query := fmt.Sprintf(`
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SELECT MsgSvrID, Sequence, CreateTime, StrTalker, IsSender,
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Type, SubType, StrContent, CompressContent, BytesExtra
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FROM MSG
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WHERE %s
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ORDER BY Sequence ASC
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`, 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，跳过此talker
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if strings.Contains(err.Error(), "no such table") {
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continue
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}
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log.Err(err).Msgf("从数据库 %s 查询消息失败", dbInfo.FilePath)
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continue
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}
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// 处理查询结果，在读取时进行过滤
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for rows.Next() {
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var msg model.MessageV3
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var compressContent []byte
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var bytesExtra []byte
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err := rows.Scan(
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&msg.MsgSvrID,
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&msg.Sequence,
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&msg.CreateTime,
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&msg.StrTalker,
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&msg.IsSender,
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&msg.Type,
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&msg.SubType,
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&msg.StrContent,
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&compressContent,
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&bytesExtra,
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)
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if err != nil {
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rows.Close()
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return nil, errors.ScanRowFailed(err)
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}
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msg.CompressContent = compressContent
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msg.BytesExtra = bytesExtra
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// 将消息转换为标准格式
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message := msg.Wrap()
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// 应用sender过滤
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if len(senders) > 0 {
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senderMatch := false
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for _, s := range senders {
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if message.Sender == s {
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senderMatch = true
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break
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}
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}
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if !senderMatch {
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continue // 不匹配sender，跳过此消息
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}
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}
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// 应用keyword过滤
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if regex != nil {
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plainText := message.PlainTextContent()
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if !regex.MatchString(plainText) {
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continue // 不匹配keyword，跳过此消息
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}
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}
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// 通过所有过滤条件，保留此消息
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filteredMessages = append(filteredMessages, message)
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// 检查是否已经满足分页处理数量
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if limit > 0 && len(filteredMessages) >= offset+limit {
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// 已经获取了足够的消息，可以提前返回
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rows.Close()
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// 对所有消息按时间排序
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sort.Slice(filteredMessages, func(i, j int) bool {
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return filteredMessages[i].Seq < filteredMessages[j].Seq
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})
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// 处理分页
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if offset >= len(filteredMessages) {
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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(filteredMessages) {
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end = len(filteredMessages)
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}
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return filteredMessages[offset:end], nil
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}
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}
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rows.Close()
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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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sort.Slice(filteredMessages, func(i, j int) bool {
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return filteredMessages[i].Seq < filteredMessages[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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if offset >= len(filteredMessages) {
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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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if end > len(filteredMessages) {
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end = len(filteredMessages)
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}
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return totalMessages[offset:end], nil
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return filteredMessages[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, err := ds.dbm.OpenDB(dbInfo.FilePath)
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if err != nil {
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return nil, errors.DBConnectFailed(dbInfo.FilePath, nil)
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}
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// 构建查询条件
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conditions := []string{"Sequence >= ? AND Sequence <= ?"}
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args := []interface{}{startTime.Unix() * 1000, endTime.Unix() * 1000}
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if len(talker) > 0 {
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// TalkerId 有索引，优先使用
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talkerID, ok := dbInfo.TalkerMap[talker]
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if ok {
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conditions = append(conditions, "TalkerId = ?")
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args = append(args, talkerID)
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} else {
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conditions = append(conditions, "StrTalker = ?")
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args = append(args, talker)
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}
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}
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query := fmt.Sprintf(`
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SELECT MsgSvrID, Sequence, CreateTime, StrTalker, IsSender,
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Type, SubType, StrContent, CompressContent, BytesExtra
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FROM MSG
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WHERE %s
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ORDER BY Sequence ASC
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`, 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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totalMessages := []*model.Message{}
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for rows.Next() {
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var msg model.MessageV3
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var compressContent []byte
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var bytesExtra []byte
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err := rows.Scan(
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&msg.MsgSvrID,
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&msg.Sequence,
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&msg.CreateTime,
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&msg.StrTalker,
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&msg.IsSender,
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&msg.Type,
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&msg.SubType,
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&msg.StrContent,
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&compressContent,
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&bytesExtra,
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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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msg.CompressContent = compressContent
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msg.BytesExtra = bytesExtra
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totalMessages = append(totalMessages, msg.Wrap())
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}
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return totalMessages, 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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// 构建查询条件
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conditions := []string{"Sequence >= ? AND Sequence <= ?"}
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args := []interface{}{startTime.Unix() * 1000, endTime.Unix() * 1000}
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if len(talker) > 0 {
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talkerID, ok := dbInfo.TalkerMap[talker]
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if ok {
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conditions = append(conditions, "TalkerId = ?")
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args = append(args, talkerID)
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} else {
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conditions = append(conditions, "StrTalker = ?")
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args = append(args, talker)
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}
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}
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query := fmt.Sprintf(`
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SELECT MsgSvrID, Sequence, CreateTime, StrTalker, IsSender,
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Type, SubType, StrContent, CompressContent, BytesExtra
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FROM MSG
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WHERE %s
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ORDER BY Sequence ASC
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`, 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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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.MessageV3
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var compressContent []byte
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var bytesExtra []byte
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err := rows.Scan(
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&msg.MsgSvrID,
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&msg.Sequence,
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&msg.CreateTime,
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&msg.StrTalker,
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&msg.IsSender,
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&msg.Type,
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&msg.SubType,
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&msg.StrContent,
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&compressContent,
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&bytesExtra,
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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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msg.CompressContent = compressContent
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msg.BytesExtra = bytesExtra
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messages = append(messages, msg.Wrap())
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}
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return messages, nil
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return filteredMessages, nil
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}
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// GetContacts 实现获取联系人信息的方法
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