302 lines
11 KiB
JavaScript
302 lines
11 KiB
JavaScript
// ═══════════════════════════════════════════════════════════════════════════
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// Vector Import/Export
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// 向量数据导入导出（当前 chatId 级别）
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// ═══════════════════════════════════════════════════════════════════════════
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import { zipSync, unzipSync, strToU8, strFromU8 } from '../../../libs/fflate.mjs';
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import { getContext } from '../../../../../../extensions.js';
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import { xbLog } from '../../../core/debug-core.js';
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import {
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getMeta,
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updateMeta,
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getAllChunks,
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getAllChunkVectors,
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getAllEventVectors,
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saveChunks,
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saveChunkVectors,
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clearAllChunks,
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clearEventVectors,
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saveEventVectors,
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} from './chunk-store.js';
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import { getEngineFingerprint } from './embedder.js';
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import { getVectorConfig } from '../data/config.js';
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const MODULE_ID = 'vector-io';
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const EXPORT_VERSION = 1;
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// ═══════════════════════════════════════════════════════════════════════════
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// 工具函数
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// ═══════════════════════════════════════════════════════════════════════════
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function float32ToBytes(vectors, dims) {
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const totalFloats = vectors.length * dims;
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const buffer = new ArrayBuffer(totalFloats * 4);
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const view = new Float32Array(buffer);
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let offset = 0;
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for (const vec of vectors) {
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for (let i = 0; i < dims; i++) {
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view[offset++] = vec[i] || 0;
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}
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}
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return new Uint8Array(buffer);
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}
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function bytesToFloat32(bytes, dims) {
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const view = new Float32Array(bytes.buffer, bytes.byteOffset, bytes.byteLength / 4);
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const vectors = [];
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for (let i = 0; i < view.length; i += dims) {
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vectors.push(Array.from(view.slice(i, i + dims)));
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}
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return vectors;
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}
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function downloadBlob(blob, filename) {
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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a.download = filename;
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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URL.revokeObjectURL(url);
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// 导出
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// ═══════════════════════════════════════════════════════════════════════════
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export async function exportVectors(onProgress) {
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const { chatId } = getContext();
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if (!chatId) {
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throw new Error('未打开聊天');
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}
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onProgress?.('读取数据...');
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const meta = await getMeta(chatId);
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const chunks = await getAllChunks(chatId);
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const chunkVectors = await getAllChunkVectors(chatId);
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const eventVectors = await getAllEventVectors(chatId);
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if (chunks.length === 0 && eventVectors.length === 0) {
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throw new Error('没有可导出的向量数据');
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}
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// 确定维度
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const dims = chunkVectors[0]?.vector?.length || eventVectors[0]?.vector?.length || 0;
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if (dims === 0) {
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throw new Error('无法确定向量维度');
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}
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onProgress?.('构建索引...');
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// 构建 chunk 索引（按 chunkId 排序保证顺序一致）
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const sortedChunks = [...chunks].sort((a, b) => a.chunkId.localeCompare(b.chunkId));
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const chunkVectorMap = new Map(chunkVectors.map(cv => [cv.chunkId, cv.vector]));
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// chunks.jsonl
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const chunksJsonl = sortedChunks.map(c => JSON.stringify({
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chunkId: c.chunkId,
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floor: c.floor,
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chunkIdx: c.chunkIdx,
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speaker: c.speaker,
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isUser: c.isUser,
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text: c.text,
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textHash: c.textHash,
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})).join('\n');
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// chunk_vectors.bin（按 sortedChunks 顺序）
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const chunkVectorsOrdered = sortedChunks.map(c => chunkVectorMap.get(c.chunkId) || new Array(dims).fill(0));
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onProgress?.('压缩向量...');
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// 构建 event 索引
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const sortedEventVectors = [...eventVectors].sort((a, b) => a.eventId.localeCompare(b.eventId));
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const eventsJsonl = sortedEventVectors.map(ev => JSON.stringify({
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eventId: ev.eventId,
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})).join('\n');
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// event_vectors.bin
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const eventVectorsOrdered = sortedEventVectors.map(ev => ev.vector);
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// manifest
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const manifest = {
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version: EXPORT_VERSION,
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exportedAt: Date.now(),
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chatId,
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fingerprint: meta.fingerprint || '',
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dims,
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chunkCount: sortedChunks.length,
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chunkVectorCount: chunkVectors.length,
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eventCount: sortedEventVectors.length,
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lastChunkFloor: meta.lastChunkFloor ?? -1,
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};
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onProgress?.('打包文件...');
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// 打包 zip
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const zipData = zipSync({
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'manifest.json': strToU8(JSON.stringify(manifest, null, 2)),
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'chunks.jsonl': strToU8(chunksJsonl),
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'chunk_vectors.bin': float32ToBytes(chunkVectorsOrdered, dims),
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'events.jsonl': strToU8(eventsJsonl),
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'event_vectors.bin': float32ToBytes(eventVectorsOrdered, dims),
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}, { level: 1 }); // 降低压缩级别，速度优先
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onProgress?.('下载文件...');
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// 生成文件名
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const timestamp = new Date().toISOString().slice(0, 10).replace(/-/g, '');
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const shortChatId = chatId.slice(0, 8);
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const filename = `vectors_${shortChatId}_${timestamp}.zip`;
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downloadBlob(new Blob([zipData]), filename);
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const sizeMB = (zipData.byteLength / 1024 / 1024).toFixed(2);
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xbLog.info(MODULE_ID, `导出完成: ${filename} (${sizeMB}MB)`);
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return {
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filename,
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size: zipData.byteLength,
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chunkCount: sortedChunks.length,
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eventCount: sortedEventVectors.length,
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};
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// 导入
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// ═══════════════════════════════════════════════════════════════════════════
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export async function importVectors(file, onProgress) {
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const { chatId } = getContext();
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if (!chatId) {
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throw new Error('未打开聊天');
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}
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onProgress?.('读取文件...');
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const arrayBuffer = await file.arrayBuffer();
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const zipData = new Uint8Array(arrayBuffer);
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onProgress?.('解压文件...');
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let unzipped;
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try {
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unzipped = unzipSync(zipData);
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} catch (e) {
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throw new Error('文件格式错误，无法解压');
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}
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// 读取 manifest
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if (!unzipped['manifest.json']) {
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throw new Error('缺少 manifest.json');
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}
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const manifest = JSON.parse(strFromU8(unzipped['manifest.json']));
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if (manifest.version !== EXPORT_VERSION) {
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throw new Error(`不支持的版本: ${manifest.version}`);
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}
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onProgress?.('校验数据...');
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// 校验 fingerprint
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const vectorCfg = getVectorConfig();
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const currentFingerprint = vectorCfg ? getEngineFingerprint(vectorCfg) : '';
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const fingerprintMismatch = manifest.fingerprint && currentFingerprint && manifest.fingerprint !== currentFingerprint;
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// chatId 校验（警告但允许）
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const chatIdMismatch = manifest.chatId !== chatId;
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const warnings = [];
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if (fingerprintMismatch) {
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warnings.push(`向量引擎不匹配（文件: ${manifest.fingerprint}, 当前: ${currentFingerprint}），导入后需重新生成`);
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}
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if (chatIdMismatch) {
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warnings.push(`聊天ID不匹配（文件: ${manifest.chatId}, 当前: ${chatId}）`);
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}
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onProgress?.('解析数据...');
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// 解析 chunks
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const chunksJsonl = unzipped['chunks.jsonl'] ? strFromU8(unzipped['chunks.jsonl']) : '';
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const chunkMetas = chunksJsonl.split('\n').filter(Boolean).map(line => JSON.parse(line));
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// 解析 chunk vectors
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const chunkVectorsBytes = unzipped['chunk_vectors.bin'];
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const chunkVectors = chunkVectorsBytes ? bytesToFloat32(chunkVectorsBytes, manifest.dims) : [];
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// 解析 events
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const eventsJsonl = unzipped['events.jsonl'] ? strFromU8(unzipped['events.jsonl']) : '';
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const eventMetas = eventsJsonl.split('\n').filter(Boolean).map(line => JSON.parse(line));
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// 解析 event vectors
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const eventVectorsBytes = unzipped['event_vectors.bin'];
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const eventVectors = eventVectorsBytes ? bytesToFloat32(eventVectorsBytes, manifest.dims) : [];
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// 校验数量
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if (chunkMetas.length !== chunkVectors.length) {
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throw new Error(`chunk 数量不匹配: 元数据 ${chunkMetas.length}, 向量 ${chunkVectors.length}`);
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}
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if (eventMetas.length !== eventVectors.length) {
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throw new Error(`event 数量不匹配: 元数据 ${eventMetas.length}, 向量 ${eventVectors.length}`);
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}
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onProgress?.('清空旧数据...');
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// 清空当前数据
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await clearAllChunks(chatId);
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await clearEventVectors(chatId);
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onProgress?.('写入数据...');
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// 写入 chunks
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if (chunkMetas.length > 0) {
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const chunksToSave = chunkMetas.map(meta => ({
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chunkId: meta.chunkId,
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floor: meta.floor,
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chunkIdx: meta.chunkIdx,
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speaker: meta.speaker,
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isUser: meta.isUser,
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text: meta.text,
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textHash: meta.textHash,
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}));
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await saveChunks(chatId, chunksToSave);
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// 写入 chunk vectors
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const chunkVectorItems = chunkMetas.map((meta, idx) => ({
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chunkId: meta.chunkId,
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vector: chunkVectors[idx],
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}));
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await saveChunkVectors(chatId, chunkVectorItems, manifest.fingerprint);
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}
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// 写入 event vectors
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if (eventMetas.length > 0) {
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const eventVectorItems = eventMetas.map((meta, idx) => ({
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eventId: meta.eventId,
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vector: eventVectors[idx],
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}));
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await saveEventVectors(chatId, eventVectorItems, manifest.fingerprint);
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}
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// 更新 meta
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await updateMeta(chatId, {
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fingerprint: manifest.fingerprint,
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lastChunkFloor: manifest.lastChunkFloor,
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});
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xbLog.info(MODULE_ID, `导入完成: ${chunkMetas.length} chunks, ${eventMetas.length} events`);
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return {
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chunkCount: chunkMetas.length,
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eventCount: eventMetas.length,
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warnings,
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fingerprintMismatch,
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};
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}
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