package com.vincent.rsf.server.ai.service.impl.conversation;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.vincent.rsf.framework.common.Cools;
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import com.vincent.rsf.framework.exception.CoolException;
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import com.vincent.rsf.server.ai.config.AiDefaults;
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import com.vincent.rsf.server.ai.dto.AiChatMemoryDto;
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import com.vincent.rsf.server.ai.dto.AiChatMessageDto;
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import com.vincent.rsf.server.ai.dto.AiChatSessionDto;
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import com.vincent.rsf.server.ai.entity.AiChatMessage;
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import com.vincent.rsf.server.ai.entity.AiChatSession;
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import com.vincent.rsf.server.ai.mapper.AiChatMessageMapper;
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import com.vincent.rsf.server.ai.mapper.AiChatSessionMapper;
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import com.vincent.rsf.server.ai.store.AiConversationCacheStore;
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import com.vincent.rsf.server.system.enums.StatusType;
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import lombok.RequiredArgsConstructor;
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import org.springframework.stereotype.Service;
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import org.springframework.util.StringUtils;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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@Service
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@RequiredArgsConstructor
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public class AiConversationQueryService {
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private final AiChatSessionMapper aiChatSessionMapper;
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private final AiChatMessageMapper aiChatMessageMapper;
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private final AiConversationCacheStore aiConversationCacheStore;
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public AiChatMemoryDto getMemory(Long userId, Long tenantId, String promptCode, Long sessionId) {
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ensureIdentity(userId, tenantId);
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String resolvedPromptCode = requirePromptCode(promptCode);
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AiChatMemoryDto cached = aiConversationCacheStore.getMemory(tenantId, userId, resolvedPromptCode, sessionId);
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if (cached != null) {
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return cached;
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}
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AiChatSession session = sessionId == null
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? findLatestSession(userId, tenantId, resolvedPromptCode)
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: getSession(sessionId, userId, tenantId, resolvedPromptCode);
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AiChatMemoryDto memory;
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if (session == null) {
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memory = AiChatMemoryDto.builder()
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.sessionId(null)
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.memorySummary(null)
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.memoryFacts(null)
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.recentMessageCount(0)
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.persistedMessages(List.of())
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.shortMemoryMessages(List.of())
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.build();
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aiConversationCacheStore.cacheMemory(tenantId, userId, resolvedPromptCode, sessionId, memory);
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return memory;
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}
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List<AiChatMessageDto> persistedMessages = listMessages(session.getId());
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List<AiChatMessageDto> shortMemoryMessages = tailMessagesByRounds(persistedMessages, AiDefaults.MEMORY_RECENT_ROUNDS);
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memory = AiChatMemoryDto.builder()
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.sessionId(session.getId())
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.memorySummary(session.getMemorySummary())
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.memoryFacts(session.getMemoryFacts())
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.recentMessageCount(shortMemoryMessages.size())
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.persistedMessages(persistedMessages)
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.shortMemoryMessages(shortMemoryMessages)
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.build();
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aiConversationCacheStore.cacheMemory(tenantId, userId, resolvedPromptCode, session.getId(), memory);
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if (sessionId == null || !session.getId().equals(sessionId)) {
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aiConversationCacheStore.cacheMemory(tenantId, userId, resolvedPromptCode, null, memory);
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}
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return memory;
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}
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public List<AiChatSessionDto> listSessions(Long userId, Long tenantId, String promptCode, String keyword) {
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ensureIdentity(userId, tenantId);
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String resolvedPromptCode = requirePromptCode(promptCode);
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List<AiChatSessionDto> cached = aiConversationCacheStore.getSessionList(tenantId, userId, resolvedPromptCode, keyword);
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if (cached != null) {
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return cached;
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}
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List<AiChatSession> sessions = aiChatSessionMapper.selectList(new LambdaQueryWrapper<AiChatSession>()
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.eq(AiChatSession::getUserId, userId)
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.eq(AiChatSession::getTenantId, tenantId)
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.eq(AiChatSession::getPromptCode, resolvedPromptCode)
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.eq(AiChatSession::getDeleted, 0)
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.eq(AiChatSession::getStatus, StatusType.ENABLE.val)
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.like(StringUtils.hasText(keyword), AiChatSession::getTitle, keyword == null ? null : keyword.trim())
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.orderByDesc(AiChatSession::getPinned)
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.orderByDesc(AiChatSession::getLastMessageTime)
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.orderByDesc(AiChatSession::getId));
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if (Cools.isEmpty(sessions)) {
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aiConversationCacheStore.cacheSessionList(tenantId, userId, resolvedPromptCode, keyword, List.of());
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return List.of();
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}
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List<Long> sessionIds = sessions.stream().map(AiChatSession::getId).toList();
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Map<Long, AiChatMessage> latestMessageMap = new LinkedHashMap<>();
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for (AiChatMessage message : aiChatMessageMapper.selectLatestMessagesBySessionIds(sessionIds)) {
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latestMessageMap.put(message.getSessionId(), message);
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}
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List<AiChatSessionDto> result = new ArrayList<>();
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for (AiChatSession session : sessions) {
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result.add(buildSessionDto(session, latestMessageMap.get(session.getId())));
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}
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aiConversationCacheStore.cacheSessionList(tenantId, userId, resolvedPromptCode, keyword, result);
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return result;
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}
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public void evictConversationCaches(Long tenantId, Long userId) {
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aiConversationCacheStore.evictUserConversationCaches(tenantId, userId);
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}
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public AiChatSession findLatestSession(Long userId, Long tenantId, String promptCode) {
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return aiChatSessionMapper.selectOne(new LambdaQueryWrapper<AiChatSession>()
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.eq(AiChatSession::getUserId, userId)
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.eq(AiChatSession::getTenantId, tenantId)
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.eq(AiChatSession::getPromptCode, promptCode)
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.eq(AiChatSession::getDeleted, 0)
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.eq(AiChatSession::getStatus, StatusType.ENABLE.val)
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.orderByDesc(AiChatSession::getLastMessageTime)
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.orderByDesc(AiChatSession::getId)
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.last("limit 1"));
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}
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public AiChatSession getSession(Long sessionId, Long userId, Long tenantId, String promptCode) {
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AiChatSession session = aiChatSessionMapper.selectOne(new LambdaQueryWrapper<AiChatSession>()
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.eq(AiChatSession::getId, sessionId)
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.eq(AiChatSession::getUserId, userId)
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.eq(AiChatSession::getTenantId, tenantId)
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.eq(AiChatSession::getPromptCode, promptCode)
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.eq(AiChatSession::getDeleted, 0)
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.eq(AiChatSession::getStatus, StatusType.ENABLE.val)
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.last("limit 1"));
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if (session == null) {
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throw new CoolException("AI 会话不存在或无权访问");
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}
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return session;
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}
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public AiChatSession requireOwnedSession(Long sessionId, Long userId, Long tenantId) {
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if (sessionId == null) {
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throw new CoolException("AI 会话 ID 不能为空");
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}
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AiChatSession session = aiChatSessionMapper.selectOne(new LambdaQueryWrapper<AiChatSession>()
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.eq(AiChatSession::getId, sessionId)
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.eq(AiChatSession::getUserId, userId)
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.eq(AiChatSession::getTenantId, tenantId)
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.eq(AiChatSession::getDeleted, 0)
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.eq(AiChatSession::getStatus, StatusType.ENABLE.val)
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.last("limit 1"));
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if (session == null) {
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throw new CoolException("AI 会话不存在或无权访问");
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}
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return session;
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}
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public List<AiChatMessageDto> listMessages(Long sessionId) {
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List<AiChatMessage> records = listMessageRecords(sessionId);
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if (Cools.isEmpty(records)) {
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return List.of();
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}
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List<AiChatMessageDto> messages = new ArrayList<>();
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for (AiChatMessage record : records) {
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if (!StringUtils.hasText(record.getContent())) {
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continue;
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}
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AiChatMessageDto item = new AiChatMessageDto();
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item.setRole(record.getRole());
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item.setContent(record.getContent());
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messages.add(item);
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}
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return messages;
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}
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public List<AiChatMessage> listMessageRecords(Long sessionId) {
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return aiChatMessageMapper.selectList(new LambdaQueryWrapper<AiChatMessage>()
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.eq(AiChatMessage::getSessionId, sessionId)
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.eq(AiChatMessage::getDeleted, 0)
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.orderByAsc(AiChatMessage::getSeqNo)
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.orderByAsc(AiChatMessage::getId));
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}
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public int findNextSeqNo(Long sessionId) {
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AiChatMessage lastMessage = aiChatMessageMapper.selectOne(new LambdaQueryWrapper<AiChatMessage>()
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.eq(AiChatMessage::getSessionId, sessionId)
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.eq(AiChatMessage::getDeleted, 0)
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.orderByDesc(AiChatMessage::getSeqNo)
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.orderByDesc(AiChatMessage::getId)
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.last("limit 1"));
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return lastMessage == null || lastMessage.getSeqNo() == null ? 1 : lastMessage.getSeqNo() + 1;
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}
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public String resolveUpdatedTitle(String currentTitle, List<AiChatMessageDto> memoryMessages) {
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if (StringUtils.hasText(currentTitle)) {
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return currentTitle;
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}
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for (AiChatMessageDto item : memoryMessages) {
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if ("user".equals(item.getRole()) && StringUtils.hasText(item.getContent())) {
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return buildSessionTitle(item.getContent());
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}
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}
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return null;
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}
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public String buildSessionTitle(String titleSeed) {
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if (!StringUtils.hasText(titleSeed)) {
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throw new CoolException("AI 会话标题不能为空");
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}
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String title = titleSeed.trim()
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.replace("\r", " ")
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.replace("\n", " ")
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.replaceAll("\\s+", " ");
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int punctuationIndex = findSummaryBreakIndex(title);
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if (punctuationIndex > 0) {
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title = title.substring(0, punctuationIndex).trim();
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}
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return title.length() > 48 ? title.substring(0, 48) : title;
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}
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public List<AiChatMessageDto> tailMessagesByRounds(List<AiChatMessageDto> source, int rounds) {
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if (Cools.isEmpty(source) || rounds <= 0) {
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return List.of();
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}
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int userCount = 0;
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int startIndex = source.size();
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for (int i = source.size() - 1; i >= 0; i--) {
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AiChatMessageDto item = source.get(i);
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startIndex = i;
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if (item != null && "user".equalsIgnoreCase(item.getRole())) {
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userCount++;
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if (userCount >= rounds) {
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break;
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}
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}
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}
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return new ArrayList<>(source.subList(Math.max(0, startIndex), source.size()));
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}
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public List<AiChatMessage> tailMessageRecordsByRounds(List<AiChatMessage> source, int rounds) {
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if (Cools.isEmpty(source) || rounds <= 0) {
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return List.of();
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}
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int userCount = 0;
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int startIndex = source.size();
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for (int i = source.size() - 1; i >= 0; i--) {
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AiChatMessage item = source.get(i);
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startIndex = i;
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if (item != null && "user".equalsIgnoreCase(item.getRole())) {
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userCount++;
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if (userCount >= rounds) {
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break;
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}
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}
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}
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return new ArrayList<>(source.subList(Math.max(0, startIndex), source.size()));
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}
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public String compactText(String content, int maxLength) {
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if (!StringUtils.hasText(content)) {
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return null;
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}
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String normalized = content.trim()
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.replace("\r", " ")
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.replace("\n", " ")
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.replaceAll("\\s+", " ");
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return normalized.length() > maxLength ? normalized.substring(0, maxLength) : normalized;
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}
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public String requirePromptCode(String promptCode) {
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if (!StringUtils.hasText(promptCode)) {
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throw new CoolException("Prompt 编码不能为空");
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}
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return promptCode;
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}
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public void ensureIdentity(Long userId, Long tenantId) {
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if (userId == null) {
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throw new CoolException("当前登录用户不存在");
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}
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if (tenantId == null) {
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throw new CoolException("当前租户不存在");
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}
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}
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private int findSummaryBreakIndex(String title) {
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String[] separators = {"。", "！", "？", ".", "!", "?"};
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int result = -1;
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for (String separator : separators) {
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int index = title.indexOf(separator);
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if (index > 0 && (result < 0 || index < result)) {
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result = index;
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}
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}
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return result;
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}
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private AiChatSessionDto buildSessionDto(AiChatSession session, AiChatMessage lastMessage) {
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return AiChatSessionDto.builder()
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.sessionId(session.getId())
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.title(session.getTitle())
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.promptCode(session.getPromptCode())
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.pinned(session.getPinned() != null && session.getPinned() == 1)
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.lastMessagePreview(buildLastMessagePreview(lastMessage))
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.lastMessageTime(session.getLastMessageTime())
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.build();
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}
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private String buildLastMessagePreview(AiChatMessage message) {
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if (message == null || !StringUtils.hasText(message.getContent())) {
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return null;
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}
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String preview = message.getContent().trim()
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.replace("\r", " ")
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.replace("\n", " ")
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.replaceAll("\\s+", " ");
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String prefix = "assistant".equalsIgnoreCase(message.getRole()) ? "AI: " : "你: ";
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String normalized = prefix + preview;
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return normalized.length() > 80 ? normalized.substring(0, 80) : normalized;
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}
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}
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