78 行
2.9 KiB
Java
78 行
2.9 KiB
Java
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package com.xuqm.im.service;
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import com.fasterxml.jackson.core.type.TypeReference;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.xuqm.common.exception.BusinessException;
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import com.xuqm.im.entity.ImGroupEntity;
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import com.xuqm.im.repository.ImGroupRepository;
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import org.springframework.stereotype.Service;
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import java.time.LocalDateTime;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.UUID;
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@Service
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public class ImGroupService {
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private final ImGroupRepository groupRepository;
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private final ObjectMapper objectMapper;
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public ImGroupService(ImGroupRepository groupRepository, ObjectMapper objectMapper) {
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this.groupRepository = groupRepository;
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this.objectMapper = objectMapper;
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}
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public ImGroupEntity create(String appId, String name, String creatorId, List<String> memberIds) {
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List<String> members = new ArrayList<>(memberIds);
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if (!members.contains(creatorId)) members.add(creatorId);
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ImGroupEntity group = new ImGroupEntity();
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group.setId(UUID.randomUUID().toString());
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group.setAppId(appId);
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group.setName(name);
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group.setCreatorId(creatorId);
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group.setMemberIds(toJson(members));
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group.setAdminIds(toJson(List.of(creatorId)));
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group.setCreatedAt(LocalDateTime.now());
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return groupRepository.save(group);
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}
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public ImGroupEntity addMember(String groupId, String userId) {
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ImGroupEntity group = groupRepository.findById(groupId)
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.orElseThrow(() -> new BusinessException(404, "群组不存在"));
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List<String> members = fromJson(group.getMemberIds());
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if (!members.contains(userId)) {
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members.add(userId);
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group.setMemberIds(toJson(members));
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groupRepository.save(group);
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}
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return group;
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}
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public ImGroupEntity removeMember(String groupId, String userId, String operatorId) {
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ImGroupEntity group = groupRepository.findById(groupId)
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.orElseThrow(() -> new BusinessException(404, "群组不存在"));
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List<String> admins = fromJson(group.getAdminIds());
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if (!admins.contains(operatorId) && !group.getCreatorId().equals(operatorId)) {
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throw new BusinessException(403, "无权操作");
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}
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List<String> members = new ArrayList<>(fromJson(group.getMemberIds()));
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members.remove(userId);
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group.setMemberIds(toJson(members));
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return groupRepository.save(group);
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}
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public List<ImGroupEntity> listByApp(String appId) {
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return groupRepository.findByAppId(appId);
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}
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private String toJson(List<String> list) {
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try { return objectMapper.writeValueAsString(list); } catch (Exception e) { return "[]"; }
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}
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private List<String> fromJson(String json) {
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try { return objectMapper.readValue(json, new TypeReference<>() {}); } catch (Exception e) { return new ArrayList<>(); }
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}
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}
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