feat: 添加会议转录文件服务
- 新增 `MeetingTranscriptFileServiceImpl` 实现会议转录文件的初始化和导出功能 - 定义 `MeetingTranscriptExportResult` 数据传输对象，用于封装导出结果 - 定义 `MeetingTranscriptFileService` 接口，提供初始化和导出会议转录文件的方法dev_na
chenhao
parent
35698287de
commit
a8b93a46f8
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package com.imeeting.dto.biz;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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@Data
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@AllArgsConstructor
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public class MeetingTranscriptExportResult {
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private byte[] content;
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private String contentType;
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private String fileName;
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}
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package com.imeeting.service.biz;
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import com.imeeting.dto.biz.MeetingTranscriptExportResult;
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import com.imeeting.dto.biz.MeetingVO;
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import com.imeeting.entity.biz.Meeting;
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public interface MeetingTranscriptFileService {
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void initializeTranscriptFileIfAbsent(Long meetingId);
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MeetingTranscriptExportResult exportTranscript(Meeting meeting, MeetingVO meetingDetail);
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}
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package com.imeeting.service.biz.impl;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.imeeting.dto.biz.MeetingTranscriptExportResult;
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import com.imeeting.dto.biz.MeetingVO;
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import com.imeeting.entity.biz.Meeting;
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import com.imeeting.entity.biz.MeetingTranscript;
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import com.imeeting.mapper.biz.MeetingMapper;
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import com.imeeting.mapper.biz.MeetingTranscriptMapper;
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import com.imeeting.service.biz.MeetingTranscriptFileService;
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import lombok.RequiredArgsConstructor;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Service;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.List;
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@Service
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@RequiredArgsConstructor
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public class MeetingTranscriptFileServiceImpl implements MeetingTranscriptFileService {
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private static final String TRANSCRIPT_RELATIVE_PATH_TEMPLATE = "meetings/%s/transcripts/current.md";
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private static final String CONTENT_TYPE = "text/markdown; charset=UTF-8";
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private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
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private final MeetingMapper meetingMapper;
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private final MeetingTranscriptMapper meetingTranscriptMapper;
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@Value("${unisbase.app.upload-path}")
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private String uploadPath;
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@Override
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public void initializeTranscriptFileIfAbsent(Long meetingId) {
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if (meetingId == null) {
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return;
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}
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Path transcriptPath = buildTranscriptPath(meetingId);
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if (Files.exists(transcriptPath)) {
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return;
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}
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Meeting meeting = meetingMapper.selectById(meetingId);
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if (meeting == null) {
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return;
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}
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writeTranscriptFile(meeting, null);
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}
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@Override
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public MeetingTranscriptExportResult exportTranscript(Meeting meeting, MeetingVO meetingDetail) {
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if (meeting == null || meeting.getId() == null) {
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throw new RuntimeException("会议不存在");
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}
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byte[] content = writeTranscriptFile(meeting, meetingDetail);
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String safeTitle = sanitizeFileName(
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meetingDetail != null ? meetingDetail.getTitle() : meeting.getTitle(),
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"meeting-transcript-" + meeting.getId()
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);
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return new MeetingTranscriptExportResult(content, CONTENT_TYPE, safeTitle + "-Transcript.md");
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}
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private byte[] writeTranscriptFile(Meeting meeting, MeetingVO meetingDetail) {
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try {
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Path transcriptPath = buildTranscriptPath(meeting.getId());
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Path parent = transcriptPath.getParent();
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if (parent != null) {
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Files.createDirectories(parent);
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}
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String markdown = buildTranscriptMarkdown(meeting, meetingDetail);
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Files.writeString(transcriptPath, markdown, StandardCharsets.UTF_8);
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return markdown.getBytes(StandardCharsets.UTF_8);
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} catch (IOException ex) {
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throw new RuntimeException("写入会议转录文件失败", ex);
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}
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}
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private String buildTranscriptMarkdown(Meeting meeting, MeetingVO meetingDetail) {
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List<MeetingTranscript> transcripts = meetingTranscriptMapper.selectList(new LambdaQueryWrapper<MeetingTranscript>()
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.eq(MeetingTranscript::getMeetingId, meeting.getId())
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.orderByAsc(MeetingTranscript::getSortOrder)
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.orderByAsc(MeetingTranscript::getStartTime)
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.orderByAsc(MeetingTranscript::getId));
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String title = firstNonBlank(meetingDetail != null ? meetingDetail.getTitle() : null, meeting.getTitle(), "未命名会议");
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String hostName = firstNonBlank(meetingDetail != null ? meetingDetail.getHostName() : null, meeting.getHostName(), "未知");
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String meetingTime = formatDateTime(meetingDetail != null ? meetingDetail.getMeetingTime() : meeting.getMeetingTime());
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StringBuilder builder = new StringBuilder();
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builder.append("# ").append(title).append(" 会议转录\n\n");
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builder.append("- 会议时间：").append(meetingTime).append("\n");
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builder.append("- 主持人：").append(hostName).append("\n");
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builder.append("- 导出时间：").append(formatDateTime(LocalDateTime.now())).append("\n\n");
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builder.append("## 转录正文\n\n");
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if (transcripts.isEmpty()) {
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builder.append("_当前暂无转录内容_\n");
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return builder.toString();
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}
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for (MeetingTranscript transcript : transcripts) {
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String speaker = firstNonBlank(transcript.getSpeakerName(), transcript.getSpeakerId(), "未知发言人");
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builder.append("- ");
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String timeRange = buildTimeRange(transcript.getStartTime(), transcript.getEndTime());
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if (!timeRange.isBlank()) {
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builder.append(timeRange).append(' ');
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}
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builder.append(speaker).append("：").append(normalizeTranscriptContent(transcript.getContent())).append("\n");
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}
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return builder.toString();
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}
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private Path buildTranscriptPath(Long meetingId) {
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String basePath = uploadPath.endsWith("/") || uploadPath.endsWith("\\") ? uploadPath : uploadPath + "/";
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String relativePath = TRANSCRIPT_RELATIVE_PATH_TEMPLATE.formatted(meetingId);
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return Paths.get(basePath, relativePath.replace("\\", "/"));
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}
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private String buildTimeRange(Integer startTime, Integer endTime) {
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if (startTime == null && endTime == null) {
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return "";
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}
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String start = formatMillis(startTime);
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String end = formatMillis(endTime);
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if (start.isBlank()) {
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return "[" + end + "]";
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}
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if (end.isBlank()) {
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return "[" + start + "]";
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}
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return "[" + start + " - " + end + "]";
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}
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private String formatMillis(Integer millis) {
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if (millis == null || millis < 0) {
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return "";
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}
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int totalSeconds = millis / 1000;
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int hours = totalSeconds / 3600;
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int minutes = (totalSeconds % 3600) / 60;
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int seconds = totalSeconds % 60;
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return String.format("%02d:%02d:%02d", hours, minutes, seconds);
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}
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private String normalizeTranscriptContent(String content) {
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if (content == null || content.isBlank()) {
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return "";
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}
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return content.replace("\r\n", " ").replace('\n', ' ').trim();
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}
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private String sanitizeFileName(String value, String fallback) {
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String normalized = value == null ? "" : value.replaceAll("[\\\\/:*?\"<>|\\r\\n]", "_").trim();
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return normalized.isEmpty() ? fallback : normalized;
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}
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private String formatDateTime(LocalDateTime value) {
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if (value == null) {
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return "未知";
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}
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return DATE_TIME_FORMATTER.format(value);
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}
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private String firstNonBlank(String... values) {
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if (values == null) {
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return "";
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}
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for (String value : values) {
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if (value != null && !value.isBlank()) {
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return value.trim();
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}
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}
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return "";
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}
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}
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