package com.ruoyi.ai.store;
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import com.ruoyi.ai.mongodbBean.ChatMessages;
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import dev.langchain4j.data.message.ChatMessage;
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import dev.langchain4j.data.message.ChatMessageDeserializer;
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import dev.langchain4j.data.message.ChatMessageSerializer;
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import dev.langchain4j.store.memory.chat.ChatMemoryStore;
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import lombok.RequiredArgsConstructor;
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import org.springframework.data.mongodb.core.MongoTemplate;
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import org.springframework.data.mongodb.core.query.Criteria;
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import org.springframework.data.mongodb.core.query.Query;
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import org.springframework.data.mongodb.core.query.Update;
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import org.springframework.stereotype.Component;
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import java.util.Date;
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import java.util.LinkedList;
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import java.util.List;
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@Component
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@RequiredArgsConstructor
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public class MongoChatMemoryStore implements ChatMemoryStore {
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private final MongoTemplate mongoTemplate;
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@Override
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public List<ChatMessage> getMessages(Object memoryId) {
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Query query = Query.query(Criteria.where("memoryId").is(memoryIdString(memoryId)));
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ChatMessages chatMessages = mongoTemplate.findOne(query, ChatMessages.class);
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if (chatMessages == null || chatMessages.getContent() == null) {
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return new LinkedList<>();
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}
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return ChatMessageDeserializer.messagesFromJson(chatMessages.getContent());
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}
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@Override
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public void updateMessages(Object memoryId, List<ChatMessage> messages) {
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String memoryIdValue = memoryIdString(memoryId);
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Query query = Query.query(Criteria.where("memoryId").is(memoryIdValue));
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Update update = new Update();
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update.set("memoryId", memoryIdValue);
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update.set("content", ChatMessageSerializer.messagesToJson(messages));
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update.set("updateTime", new Date());
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update.setOnInsert("createTime", new Date());
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mongoTemplate.upsert(query, update, ChatMessages.class);
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}
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@Override
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public void deleteMessages(Object memoryId) {
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Query query = Query.query(Criteria.where("memoryId").is(memoryIdString(memoryId)));
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mongoTemplate.remove(query, ChatMessages.class);
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}
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public void appendMessages(Object memoryId, List<ChatMessage> appendList) {
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List<ChatMessage> messages = new LinkedList<>(getMessages(memoryId));
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messages.addAll(appendList);
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updateMessages(memoryId, messages);
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}
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private String memoryIdString(Object memoryId) {
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return memoryId == null ? "" : memoryId.toString();
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}
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}
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