102 lines
3.2 KiB
JavaScript
102 lines
3.2 KiB
JavaScript
import { persistGet, persistSet } from './persistence';
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import { getChapters, saveChapters } from './storage';
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import { getSettingsNodes, saveSettingsNodes, getActiveWorkId } from './settings';
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const SNAPSHOTS_KEY = 'author-snapshots';
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/**
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* 获取所有快照
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* @returns {Promise<Array>} 快照列表（按时间倒序）
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*/
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export async function getSnapshots() {
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try {
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const snapshots = await persistGet(SNAPSHOTS_KEY);
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return Array.isArray(snapshots) ? snapshots : [];
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} catch (e) {
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console.error('Failed to get snapshots:', e);
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return [];
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}
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}
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/**
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* 创建新快照
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* @param {string} label - 快照标签描述
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* @param {string} type - 'auto' | 'manual'
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* @returns {Promise<object>}
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*/
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export async function createSnapshot(label, type = 'auto') {
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try {
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const chapters = await getChapters(getActiveWorkId());
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const settingsNodes = await getSettingsNodes();
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const snapshot = {
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id: `snap-${Date.now()}`,
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timestamp: Date.now(),
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label: label || (type === 'auto' ? '自动存档' : '手动存档'),
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type,
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stats: {
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chapterCount: chapters.length,
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totalWords: chapters.reduce((acc, ch) => acc + (ch.wordCount || 0), 0),
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settingCount: settingsNodes.length,
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},
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data: {
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chapters,
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settingsNodes,
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}
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};
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const existing = await getSnapshots();
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existing.unshift(snapshot); // 最新在前
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// 限制自动快照数量（例如最多保留 50 个自动快照，超出的按时间删除）
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const maxAutoSnapshots = 50;
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let finalSnapshots = existing;
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const autoSnapshots = existing.filter(s => s.type === 'auto');
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if (autoSnapshots.length > maxAutoSnapshots) {
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const toRemove = autoSnapshots.slice(maxAutoSnapshots).map(s => s.id);
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finalSnapshots = existing.filter(s => !toRemove.includes(s.id));
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}
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await persistSet(SNAPSHOTS_KEY, finalSnapshots);
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return snapshot;
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} catch (e) {
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console.error('Failed to create snapshot:', e);
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throw e;
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}
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}
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/**
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* 恢复到指定快照
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* @param {string} snapshotId
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* @returns {Promise<boolean>}
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*/
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export async function restoreSnapshot(snapshotId) {
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try {
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const snapshots = await getSnapshots();
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const target = snapshots.find(s => s.id === snapshotId);
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if (!target) throw new Error('Snapshot not found');
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// 发起静默的当前状态备份，以防后悔
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await createSnapshot('恢复前的备份', 'auto');
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// 覆盖现有数据
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await saveChapters(target.data.chapters || [], getActiveWorkId());
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await saveSettingsNodes(target.data.settingsNodes || []);
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return true;
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} catch (e) {
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console.error('Failed to restore snapshot:', e);
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throw e;
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}
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}
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/**
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* 删除指定快照
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*/
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export async function deleteSnapshot(snapshotId) {
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const snapshots = await getSnapshots();
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const remaining = snapshots.filter(s => s.id !== snapshotId);
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await persistSet(SNAPSHOTS_KEY, remaining);
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return remaining;
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}
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