Phase 8: version history + export (trust foundation)
Version history: new document_versions table (migration 0003) holding full-body snapshots that cascade with the doc. Throttled auto-snapshots on save (>=3min apart, max 40/doc, pruned), explicit manual restore points, and a pre_restore safety copy taken before each restore so restoring is itself undoable. Endpoints under /api/docs/:id/versions, all owner-scoped. Empties and bare renames never snapshot. Export: pure-Go Tiptap-JSON -> Markdown / HTML / plain-text / docx (no cgo/pandoc, single-binary intact), CJK-safe with RFC 5987 filenames. docx is a hand-built OOXML zip. PDF is handled client-side via the browser print dialog + an @media print stylesheet so CJK renders with the reader's own fonts. Frontend: ExportMenu (downloads + Print/PDF) and HistoryPanel (snapshot list, preview, restore) wired into the title row; bilingual zh-first to match chrome. Restore remounts the editor via editorEpoch. Stop saving empty docs: blank Untitled drafts now reuse-on-create and self-discard when navigated away from (refs avoid stale closures). Tests: versions_test.go, export_test.go (incl. valid-zip docx). go build/vet/test, tsc, vite build all clean; live end-to-end smoke verified snapshot/throttle/restore/export. Claude-Session: https://claude.ai/code/session_016Yr6jELuRc7hyzYLccQKZd
This commit is contained in:
prosolis
230
web/src/components/History/HistoryPanel.tsx
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230
web/src/components/History/HistoryPanel.tsx
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import { useCallback, useEffect, useState } from 'react'
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import { api, type Document, type DocumentVersion } from '../../api/client'
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// HistoryPanel is the "time machine" drawer: every snapshot Petal kept of this
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// document, newest first, with a one-click preview and restore. It's the safety
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// net that makes trusting Petal with real writing reasonable — a bad edit or a
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// regretted rewrite is always recoverable, and restoring is itself undoable
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// (the server keeps a pre_restore copy). Bilingual, zh-first, to match chrome.
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interface Props {
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docId: string
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onClose: () => void
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// Called after a successful restore with the freshly-restored document so the
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// editor can reload it.
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onRestored: (doc: Document) => void
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}
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// kindLabel maps a snapshot kind to its bilingual badge + accent color.
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const KIND: Record<DocumentVersion['kind'], { zh: string; en: string; color: string }> = {
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manual: { zh: '保存点', en: 'Saved point', color: 'var(--color-accent)' },
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auto: { zh: '自动', en: 'Auto', color: 'var(--color-muted)' },
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pre_restore: { zh: '恢复前', en: 'Before restore', color: 'var(--color-lavender)' },
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}
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// relativeTime renders a UTC timestamp as a gentle "x minutes ago" string.
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function relativeTime(iso: string): string {
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const then = new Date(iso).getTime()
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const secs = Math.max(0, Math.round((Date.now() - then) / 1000))
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if (secs < 60) return 'just now · 刚刚'
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const mins = Math.round(secs / 60)
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if (mins < 60) return `${mins} min ago · ${mins} 分钟前`
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const hrs = Math.round(mins / 60)
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if (hrs < 24) return `${hrs} hr ago · ${hrs} 小时前`
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const days = Math.round(hrs / 24)
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return `${days} day${days > 1 ? 's' : ''} ago · ${days} 天前`
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}
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export function HistoryPanel({ docId, onClose, onRestored }: Props) {
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const [versions, setVersions] = useState<DocumentVersion[] | null>(null)
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const [error, setError] = useState(false)
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const [selected, setSelected] = useState<DocumentVersion | null>(null)
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const [preview, setPreview] = useState<DocumentVersion | null>(null)
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const [busy, setBusy] = useState(false)
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const load = useCallback(async () => {
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setError(false)
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try {
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setVersions(await api.listVersions(docId))
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} catch {
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setError(true)
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}
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}, [docId])
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useEffect(() => {
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void load()
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}, [load])
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// Escape closes the drawer.
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useEffect(() => {
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const onKey = (e: KeyboardEvent) => {
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if (e.key === 'Escape') onClose()
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}
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window.addEventListener('keydown', onKey)
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return () => window.removeEventListener('keydown', onKey)
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}, [onClose])
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const choose = useCallback(
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async (v: DocumentVersion) => {
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setSelected(v)
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setPreview(null)
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try {
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setPreview(await api.getVersion(docId, v.id))
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} catch {
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setPreview(null)
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}
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},
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[docId],
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)
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const restore = useCallback(async () => {
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if (!selected) return
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setBusy(true)
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try {
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const doc = await api.restoreVersion(docId, selected.id)
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onRestored(doc)
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onClose()
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} catch {
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setBusy(false)
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}
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}, [docId, selected, onRestored, onClose])
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return (
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<div className="petal-no-print fixed inset-0 z-40 flex justify-end">
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{/* Backdrop */}
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<div
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className="absolute inset-0"
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style={{ background: 'rgba(61, 46, 57, 0.18)' }}
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onClick={onClose}
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/>
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<aside
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className="relative flex h-full w-full max-w-[380px] flex-col"
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style={{
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background: 'var(--color-surface)',
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borderLeft: '1px solid var(--color-border)',
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boxShadow: 'var(--shadow-soft)',
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}}
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>
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<header
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className="flex items-center justify-between px-5 py-4"
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style={{ borderBottom: '1px solid var(--color-border)' }}
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>
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<div>
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<div className="text-base font-extrabold text-plum">历史 · History</div>
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<div className="text-xs" style={{ color: 'var(--color-muted)' }}>
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Every saved moment — nothing is ever lost 🌸
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</div>
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</div>
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<button
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type="button"
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aria-label="Close history"
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onClick={onClose}
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className="flex h-8 w-8 items-center justify-center rounded-full text-lg"
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style={{ color: 'var(--color-muted)' }}
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onMouseEnter={(e) => (e.currentTarget.style.background = 'var(--color-surface-alt)')}
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onMouseLeave={(e) => (e.currentTarget.style.background = 'transparent')}
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>
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✕
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</button>
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</header>
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<div className="min-h-0 flex-1 overflow-y-auto px-3 py-3">
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{error ? (
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<div className="px-2 py-6 text-center text-sm" style={{ color: 'var(--color-muted)' }}>
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Couldn’t load history just now.
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<button onClick={load} className="ml-1 font-bold text-plum underline">
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Try again
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</button>
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</div>
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) : versions === null ? (
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<div className="px-2 py-6 text-center text-sm" style={{ color: 'var(--color-muted)' }}>
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Loading…
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</div>
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) : versions.length === 0 ? (
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<div className="px-2 py-8 text-center text-sm" style={{ color: 'var(--color-muted)' }}>
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No snapshots yet. Keep writing — Petal saves restore points as you go.
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</div>
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) : (
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<ul className="flex flex-col gap-1.5">
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{versions.map((v) => {
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const k = KIND[v.kind]
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const active = selected?.id === v.id
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return (
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<li key={v.id}>
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<button
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type="button"
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onClick={() => choose(v)}
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className="flex w-full flex-col gap-1 rounded-2xl px-3 py-2.5 text-left"
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style={{
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background: active ? 'var(--color-surface-alt)' : 'transparent',
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border: `1px solid ${active ? 'var(--color-border)' : 'transparent'}`,
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}}
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onMouseEnter={(e) =>
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(e.currentTarget.style.background = 'var(--color-surface-alt)')
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}
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onMouseLeave={(e) =>
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(e.currentTarget.style.background = active
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? 'var(--color-surface-alt)'
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: 'transparent')
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}
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>
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<div className="flex items-center justify-between gap-2">
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<span className="truncate text-sm font-bold text-plum">{v.title || 'Untitled'}</span>
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<span
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className="shrink-0 rounded-full px-2 py-0.5 text-[10px] font-bold"
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style={{ background: k.color, color: '#fff' }}
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>
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{k.zh} · {k.en}
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</span>
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</div>
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<div className="flex items-center justify-between gap-2 text-xs" style={{ color: 'var(--color-muted)' }}>
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<span>{relativeTime(v.created_at)}</span>
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<span>{v.word_count} words</span>
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</div>
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</button>
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</li>
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)
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})}
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</ul>
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)}
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</div>
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{selected && (
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<div
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className="shrink-0 px-4 py-3"
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style={{ borderTop: '1px solid var(--color-border)', background: 'var(--color-surface-alt)' }}
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>
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<div className="mb-2 text-xs font-bold" style={{ color: 'var(--color-muted)' }}>
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预览 · Preview
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</div>
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<div
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className="mb-3 max-h-32 overflow-y-auto whitespace-pre-wrap rounded-xl px-3 py-2 text-sm"
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style={{
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background: 'var(--color-surface)',
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color: 'var(--color-plum)',
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fontFamily: 'var(--font-body)',
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}}
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>
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{preview ? preview.content_text || '(empty)' : 'Loading…'}
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</div>
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<button
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type="button"
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onClick={restore}
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disabled={busy}
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className="w-full rounded-full py-2.5 text-sm font-extrabold text-white disabled:opacity-60"
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style={{ background: 'var(--color-accent)' }}
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onMouseEnter={(e) => (e.currentTarget.style.background = 'var(--color-accent-hover)')}
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onMouseLeave={(e) => (e.currentTarget.style.background = 'var(--color-accent)')}
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>
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{busy ? 'Restoring…' : '恢复这个版本 · Restore this version'}
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</button>
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<div className="mt-1.5 text-center text-[11px]" style={{ color: 'var(--color-muted)' }}>
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Your current draft is saved first, so this is undoable.
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</div>
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</div>
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)}
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</aside>
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</div>
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)
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}
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