pf_app/ui/src/views/Forecast.jsx
Paul Trowbridge 2ee0d18f2e Fix large dataset loading in Forecast view
- Switch server Arrow encoding from tableFromJSON (row objects) to
  tableFromArrays (column arrays) — cuts peak Node heap 3-5x for large
  datasets by avoiding one JS object per row
- Remove unused pf.log JOIN from data endpoint; forecast rows only
- Load Perspective viewer with direct table reference instead of worker
  Server object — fixes "No Table attached" error on large datasets where
  named-table registry lookup raced against WASM initialization
- Pre-emptively clean up stale named table in worker registry before
  creating, eliminating the "already exists" retry path that silently
  swallowed errors (finally ran but flash never fired)
- Strip cfg.table from restore configs since table is loaded by reference
- Throttle progress bar updates to 100ms intervals (was every chunk)
- Persist load errors until dismissed; add console.error for devtools

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
2026-05-21 20:52:47 -04:00

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import { useState, useEffect, useRef } from 'react'
import useTheme from '../theme.jsx'
const LAYOUT_KEY = (vid) => `pf_layout_v${vid}` // last-used layout (auto restore)
const LAYOUTS_KEY = (vid) => `pf_layouts_v${vid}` // named layout list
let perspectivePromise = null
function loadPerspective() {
if (perspectivePromise) return perspectivePromise
perspectivePromise = Promise.all([
import(/* @vite-ignore */ 'https://cdn.jsdelivr.net/npm/@perspective-dev/client@4.4.0/dist/cdn/perspective.js'),
import(/* @vite-ignore */ 'https://cdn.jsdelivr.net/npm/@perspective-dev/viewer@4.4.0/dist/cdn/perspective-viewer.js'),
import(/* @vite-ignore */ 'https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid@4.4.0/dist/cdn/perspective-viewer-datagrid.js'),
import(/* @vite-ignore */ 'https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-d3fc@4.4.0/dist/cdn/perspective-viewer-d3fc.js'),
]).then(([{ default: perspective }]) => perspective)
return perspectivePromise
}
function cleanLayout(cfg, validCols) {
if (!cfg) return cfg
const c = { ...cfg }
const exprNames = new Set(Object.keys(cfg.expressions || {}))
const ok = (col) => validCols.has(col) || exprNames.has(col)
if (c.columns) c.columns = c.columns.filter(col => col == null || ok(col))
if (c.group_by) c.group_by = c.group_by.filter(ok)
if (c.split_by) c.split_by = c.split_by.filter(ok)
if (c.sort) c.sort = c.sort.filter(([col]) => ok(col))
if (c.filter) c.filter = c.filter.filter(([col]) => ok(col))
return c
}
export default function Forecast({ sources = [], sourceId, versionId, refreshSources }) {
const { dark } = useTheme()
const [loading, setLoading] = useState(false)
const [largeDataset, setLargeDataset] = useState(false)
const [loadProgress, setLoadProgress] = useState(null) // { received, total }
const [msg, setMsg] = useState(null)
// layouts
const [layouts, setLayouts] = useState([])
const [activeLayoutId, setActiveLayoutId] = useState(null)
const [showSaveAs, setShowSaveAs] = useState(false)
const [saveAsName, setSaveAsName] = useState('')
// operation panel
const [slice, setSlice] = useState({})
const [activeOp, setActiveOp] = useState('scale')
const [currentTotals, setCurrentTotals] = useState(null) // { value, units }
const [scaleMode, setScaleMode] = useState('target') // 'target' | 'delta'
const [scaleValue, setScaleValue] = useState('')
const [scaleUnits, setScaleUnits] = useState('')
const [scalePrice, setScalePrice] = useState('')
const [scalePct, setScalePct] = useState(false)
const [scaleNote, setScaleNote] = useState('')
const [recodeSet, setRecodeSet] = useState({})
const [recodeNote, setRecodeNote] = useState('')
const [cloneSet, setCloneSet] = useState({})
const [cloneScale, setCloneScale] = useState('1')
const [cloneNote, setCloneNote] = useState('')
const [panelWidth, setPanelWidth] = useState(224)
// history modal
const [showLog, setShowLog] = useState(false)
const [logEntries, setLogEntries] = useState([])
const [logLoading, setLogLoading] = useState(false)
const [editingNote, setEditingNote] = useState(null) // { id, text }
const [undoingId, setUndoingId] = useState(null)
const viewerRef = useRef(null)
const workerRef = useRef(null)
const tableRef = useRef(null)
const colMetaRef = useRef([])
const expandDepthRef = useRef(null)
const initIdRef = useRef(0)
function onDragStart(e) {
e.preventDefault()
const startX = e.clientX
const startW = panelWidth
const onMove = (ev) => setPanelWidth(Math.max(160, Math.min(480, startW - (ev.clientX - startX))))
const onUp = () => { window.removeEventListener('mousemove', onMove); window.removeEventListener('mouseup', onUp) }
window.addEventListener('mousemove', onMove)
window.addEventListener('mouseup', onUp)
}
useEffect(() => {
if (!versionId || !sourceId) return
loadLayouts(versionId)
initViewer(versionId, sourceId)
}, [versionId, sourceId])
useEffect(() => {
if (viewerRef.current) {
viewerRef.current.setAttribute('theme', dark ? 'Pro Dark' : 'Pro Light')
}
}, [dark, versionId])
useEffect(() => {
const blank = Object.fromEntries(Object.keys(slice).map(k => [k, '']))
setRecodeSet(blank)
setCloneSet(blank)
setScaleValue('')
setScaleUnits('')
setScalePrice('')
if (Object.keys(slice).length > 0) fetchCurrentTotals(slice)
else setCurrentTotals(null)
}, [slice])
async function fetchCurrentTotals(sliceObj) {
if (!tableRef.current) return
const valueCol = colMetaRef.current.find(c => c.role === 'value')?.cname
const unitsCol = colMetaRef.current.find(c => c.role === 'units')?.cname
if (!valueCol && !unitsCol) return
try {
const dimNames = new Set(colMetaRef.current.filter(c => c.role === 'dimension').map(c => c.cname))
const filters = [
...Object.entries(sliceObj)
.filter(([col]) => dimNames.has(col))
.map(([col, val]) => [col, '==', val]),
['pf_iter', '!=', 'reference'],
]
const view = await tableRef.current.view({ filter: filters })
const rows = await view.to_json()
await view.delete()
const buckets = new Map()
for (const r of rows) {
const k = r.pf_iter || '?'
const t = buckets.get(k) || { value: 0, units: 0 }
if (valueCol) t.value += parseFloat(r[valueCol]) || 0
if (unitsCol) t.units += parseFloat(r[unitsCol]) || 0
buckets.set(k, t)
}
const ITER_ORDER = ['baseline', 'scale', 'recode', 'clone']
const byIter = Array.from(buckets, ([iter, t]) => ({ iter, ...t }))
.sort((a, b) => {
const ai = ITER_ORDER.indexOf(a.iter), bi = ITER_ORDER.indexOf(b.iter)
return (ai === -1 ? 99 : ai) - (bi === -1 ? 99 : bi)
})
const total = byIter.reduce((s, r) => ({ value: s.value + (r.value || 0), units: s.units + (r.units || 0) }), { value: 0, units: 0 })
setCurrentTotals({ byIter, total, valueCol, unitsCol })
} catch {
setCurrentTotals(null)
}
}
function loadLayouts(vid) {
const stored = localStorage.getItem(LAYOUTS_KEY(vid))
setLayouts(stored ? JSON.parse(stored) : [])
setActiveLayoutId(null)
}
async function initViewer(vid, sid) {
const viewer = viewerRef.current
if (!viewer) return
const myId = ++initIdRef.current
setLoading(true)
setLargeDataset(false)
setLoadProgress(null)
setSlice({})
expandDepthRef.current = null
try {
const [perspective, dataResult, meta] = await Promise.all([
loadPerspective(),
fetch(`/api/versions/${vid}/data`).then(async r => {
if (!r.ok) { const { error } = await r.json(); throw new Error(error || 'Failed to load data') }
const rowCount = parseInt(r.headers.get('X-Row-Count') || '0')
const total = parseInt(r.headers.get('Content-Length') || '0') || null
const reader = r.body.getReader()
const chunks = []
let received = 0
let lastUpdate = 0
setLoadProgress({ received: 0, total })
while (true) {
const { done, value } = await reader.read()
if (done) break
chunks.push(value)
received += value.byteLength
const now = Date.now()
if (now - lastUpdate >= 100) {
setLoadProgress({ received, total })
lastUpdate = now
}
}
setLoadProgress({ received, total })
const merged = new Uint8Array(received)
let pos = 0
for (const c of chunks) { merged.set(c, pos); pos += c.byteLength }
return { buffer: merged.buffer, rowCount }
}),
fetch(`/api/sources/${sid}/cols`).then(r => r.json()),
])
const { buffer, rowCount } = dataResult
colMetaRef.current = meta
const validCols = new Set([
...meta.filter(c => ['dimension','value','units','date'].includes(c.role)).map(c => c.cname),
'pf_id', 'pf_iter', 'pf_logid', 'pf_user', 'created_at',
])
const tableName = `fc_${vid}`
if (rowCount >= 500000) setLargeDataset(true)
if (myId !== initIdRef.current) return
if (!workerRef.current) workerRef.current = await perspective.worker()
const worker = workerRef.current
// Clean up the previous table — by JS reference first, then by name in the
// worker registry (covers the case where the ref was lost or delete failed).
if (tableRef.current) {
try { await tableRef.current.delete() } catch {}
tableRef.current = null
}
try {
const stale = await worker.open_table(tableName)
if (stale) await stale.delete()
} catch {}
const opts = { name: tableName, index: 'pf_id' }
tableRef.current = await (rowCount > 0 ? worker.table(buffer, opts) : worker.table([], opts))
if (myId !== initIdRef.current) {
try { await tableRef.current.delete() } catch {}
tableRef.current = null
return
}
// Load by direct table reference — avoids "No Table attached" on large datasets
// that occurs when viewer.load(worker) + restore({ table: name }) can't resolve
// the named table in time.
await viewer.load(tableRef.current)
viewer.setAttribute('theme', dark ? 'Pro Dark' : 'Pro Light')
// restore last-used layout or build default
// Strip cfg.table — table is already loaded by reference above; a stale name
// in a saved config would cause Perspective to fail the name lookup.
const saved = localStorage.getItem(LAYOUT_KEY(vid))
if (saved) {
const { table: _t, ...rest } = cleanLayout(JSON.parse(saved), validCols)
const cfg = { ...rest, plugin_config: { edit_mode: 'SELECT_REGION', ...(rest.plugin_config || {}) } }
await viewer.restore(cfg)
if (cfg.expand_depth != null) await applyDepth(cfg.expand_depth)
} else {
const sourceDefault = sources.find(s => String(s.id) === String(sid))?.default_layout
let cfg
if (sourceDefault && Object.keys(sourceDefault).length > 0) {
const { table: _t, ...rest } = cleanLayout(sourceDefault, validCols)
cfg = { ...rest, plugin_config: { edit_mode: 'SELECT_REGION', ...(rest.plugin_config || {}) } }
} else {
const valueCol = meta.find(c => c.role === 'value')?.cname
cfg = {
settings: false,
group_by: ['pf_iter'],
columns: valueCol ? [valueCol] : [],
plugin_config: { edit_mode: 'SELECT_REGION' }
}
}
await viewer.restore(cfg)
}
// auto-persist viewer state (formatting, columns, etc.) to the last-used cache
if (viewer._pspUpdate) viewer.removeEventListener('perspective-config-update', viewer._pspUpdate)
viewer._pspUpdate = async () => {
try {
const cfg = await captureConfig()
if (cfg) await persistLayout(vid, cfg)
} catch {}
}
viewer.addEventListener('perspective-config-update', viewer._pspUpdate)
// click → slice via event filters (Perspective encodes row position as [col,'==',val] triples)
if (viewer._pspClick) viewer.removeEventListener('perspective-click', viewer._pspClick)
viewer._pspClick = async (e) => {
const detail = e.detail || {}
if (!detail.row) return
const config = await viewer.save()
if (!(config.group_by || []).length) return
const eventFilters = (detail.config || {}).filter || []
const s = {}
eventFilters.forEach(([col, op, val]) => {
if (op === '==' && val != null) s[col] = String(val)
})
if (Object.keys(s).length > 0) setSlice(s)
}
viewer.addEventListener('perspective-click', viewer._pspClick)
setLargeDataset(false)
} catch (err) {
console.error('[initViewer]', err)
flash(err.message || String(err), 'error')
} finally {
setLoading(false)
}
}
async function applyDepth(d) {
const viewer = viewerRef.current
if (!viewer) return
const view = await viewer.getView()
await view.set_depth(d)
const plugin = await viewer.getPlugin()
await plugin.draw(view)
expandDepthRef.current = d
}
async function captureConfig() {
const viewer = viewerRef.current
if (!viewer) return null
const cfg = await viewer.save()
return { ...cfg, expand_depth: expandDepthRef.current }
}
async function persistLayout(vid, cfg) {
localStorage.setItem(LAYOUT_KEY(vid), JSON.stringify(cfg))
}
async function handleSaveAs() {
const name = saveAsName.trim()
if (!name) return
const cfg = await captureConfig()
if (!cfg) return
const id = Date.now()
const updated = [...layouts, { id, name, config: cfg }]
localStorage.setItem(LAYOUTS_KEY(versionId), JSON.stringify(updated))
await persistLayout(versionId, cfg)
setLayouts(updated)
setActiveLayoutId(id)
setShowSaveAs(false)
setSaveAsName('')
flash('Saved')
}
async function saveAsSourceDefault() {
const cfg = await captureConfig()
if (!cfg) return
const { table, expand_depth, ...rest } = cfg
try {
const res = await fetch(`/api/sources/${sourceId}/default-layout`, {
method: 'PUT',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify(rest)
})
if (!res.ok) { const data = await res.json(); flash(data.error || 'Failed', 'error'); return }
if (refreshSources) await refreshSources()
flash('Saved as source default')
} catch (err) { flash(err.message, 'error') }
}
async function handleSaveOver() {
const layout = layouts.find(l => l.id === activeLayoutId)
if (!layout) return
const cfg = await captureConfig()
if (!cfg) return
const updated = layouts.map(l => l.id === activeLayoutId ? { ...l, config: cfg } : l)
localStorage.setItem(LAYOUTS_KEY(versionId), JSON.stringify(updated))
await persistLayout(versionId, cfg)
setLayouts(updated)
flash('Saved')
}
async function applyLayout(layout) {
const viewer = viewerRef.current
if (!viewer) return
const validCols = new Set(tableRef.current ? Object.keys(await tableRef.current.schema()) : [])
const cfg = cleanLayout(layout.config, validCols)
cfg.plugin_config = { edit_mode: 'SELECT_REGION', ...(cfg.plugin_config || {}) }
await viewer.restore(cfg)
if (cfg.expand_depth != null) await applyDepth(cfg.expand_depth)
setActiveLayoutId(layout.id)
await persistLayout(versionId, cfg)
}
function deleteLayout(id, e) {
e.stopPropagation()
const updated = layouts.filter(l => l.id !== id)
localStorage.setItem(LAYOUTS_KEY(versionId), JSON.stringify(updated))
setLayouts(updated)
if (activeLayoutId === id) setActiveLayoutId(null)
}
function resetLayout() {
localStorage.removeItem(LAYOUT_KEY(versionId))
setActiveLayoutId(null)
const viewer = viewerRef.current
if (viewer) viewer.restore({ settings: true })
}
async function submitOp(op) {
if (!Object.keys(slice).length) { flash('Select a slice first', 'error'); return }
let body = { pf_user: 'admin', slice }
if (op === 'scale') {
let vi = null, ui = null
if (scaleMode === 'target') {
const curValue = currentTotals?.total?.value
const curUnits = currentTotals?.total?.units
if (scalePrice !== '' && curUnits != null && curValue != null) {
// hold units constant; new value = price × current units
vi = (parseFloat(scalePrice) * curUnits) - curValue
}
if (scaleValue !== '' && curValue != null)
vi = parseFloat(scaleValue) - curValue
if (scaleUnits !== '' && curUnits != null)
ui = parseFloat(scaleUnits) - curUnits
} else {
if (scaleValue !== '') vi = scalePct ? parseFloat(scaleValue) : parseFloat(scaleValue)
if (scaleUnits !== '') ui = scalePct ? parseFloat(scaleUnits) : parseFloat(scaleUnits)
}
if (vi == null && ui == null) { flash('Enter a target or increment', 'error'); return }
body = { ...body, note: scaleNote, value_incr: vi, units_incr: ui, pct: scaleMode === 'delta' && scalePct }
} else if (op === 'recode') {
const set = Object.fromEntries(Object.entries(recodeSet).filter(([, v]) => v.trim()))
if (!Object.keys(set).length) { flash('Enter at least one new dimension value', 'error'); return }
body = { ...body, note: recodeNote, set }
} else if (op === 'clone') {
const set = Object.fromEntries(Object.entries(cloneSet).filter(([, v]) => v.trim()))
if (!Object.keys(set).length) { flash('Enter at least one override value', 'error'); return }
body = { ...body, note: cloneNote, set, scale: parseFloat(cloneScale) || 1 }
}
try {
const res = await fetch(`/api/versions/${versionId}/${op}`, {
method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body)
})
const data = await res.json()
if (!res.ok) { flash(data.error, 'error'); return }
if (data.rows?.length && tableRef.current) await tableRef.current.update(data.rows)
flash(`${op}: ${data.rows_affected ?? data.rows?.length ?? ''} rows`)
if (op === 'scale') { setScaleValue(''); setScaleUnits(''); setScalePrice(''); setScaleNote(''); fetchCurrentTotals(slice) }
if (op === 'recode') { setRecodeNote('') }
if (op === 'clone') { setCloneNote(''); setCloneScale('1') }
} catch (err) { flash(err.message, 'error') }
}
function flash(text, type = 'ok') {
setMsg({ text, type })
if (type !== 'error') setTimeout(() => setMsg(null), 3000)
}
async function openLog() {
setShowLog(true)
setLogLoading(true)
try {
const data = await fetch(`/api/versions/${versionId}/log`).then(r => r.json())
setLogEntries(data)
} catch (err) {
flash(err.message, 'error')
} finally {
setLogLoading(false)
}
}
async function undoEntry(logId) {
setUndoingId(logId)
try {
const res = await fetch(`/api/log/${logId}`, { method: 'DELETE' })
const data = await res.json()
if (!res.ok) { flash(data.error, 'error'); return }
setLogEntries(prev => prev.filter(e => e.id !== logId))
if (data.pf_ids?.length && tableRef.current) {
await tableRef.current.remove(data.pf_ids)
}
flash(`Undone — ${data.rows_deleted} rows removed`)
} catch (err) {
flash(err.message, 'error')
} finally {
setUndoingId(null)
}
}
async function saveNote(logId, text) {
try {
const res = await fetch(`/api/log/${logId}`, {
method: 'PATCH', headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ note: text })
})
if (!res.ok) { flash('Failed to save note', 'error'); return }
setLogEntries(prev => prev.map(e => e.id === logId ? { ...e, note: text } : e))
setEditingNote(null)
} catch (err) {
flash(err.message, 'error')
}
}
const dimCols = colMetaRef.current.filter(c => c.role === 'dimension')
const hasSlice = Object.keys(slice).length > 0
return (
<div className="h-full flex flex-col">
{/* Toolbar */}
<div className="px-3 py-1.5 border-b border-gray-200 bg-white flex items-center gap-3 shrink-0 flex-wrap text-xs">
{/* Layout group */}
<div className="flex items-center gap-1.5">
<span className="text-gray-400 uppercase tracking-wide" style={{fontSize:'10px'}}>Layout</span>
{layouts.map(l => (
<div key={l.id} onClick={() => applyLayout(l)}
className={`flex items-center gap-1 rounded px-2 py-0.5 cursor-pointer border transition-colors
${activeLayoutId === l.id ? 'bg-blue-50 border-blue-300 text-blue-700' : 'bg-white border-gray-200 text-gray-600 hover:border-gray-400'}`}>
{l.name}
<button onClick={e => deleteLayout(l.id, e)} className="text-gray-300 hover:text-red-400 text-sm leading-none ml-0.5">×</button>
</div>
))}
{showSaveAs ? (
<div className="flex items-center gap-1">
<input autoFocus value={saveAsName} onChange={e => setSaveAsName(e.target.value)}
onKeyDown={e => { if (e.key === 'Enter') handleSaveAs(); if (e.key === 'Escape') { setShowSaveAs(false); setSaveAsName('') } }}
placeholder="Layout name…" className="border border-gray-300 rounded px-2 py-0.5 w-32 focus:outline-none focus:border-blue-400" />
<button onClick={handleSaveAs} className="text-blue-600 hover:text-blue-800 px-1">Save</button>
<button onClick={() => { setShowSaveAs(false); setSaveAsName('') }} className="text-gray-400 px-1">Cancel</button>
</div>
) : (
<>
{activeLayoutId !== null && (
<button onClick={handleSaveOver} className="border border-blue-200 text-blue-500 hover:text-blue-700 rounded px-2 py-0.5">Save</button>
)}
<button onClick={() => setShowSaveAs(true)} className="border border-dashed border-gray-200 text-gray-400 hover:text-gray-600 rounded px-2 py-0.5">
Save as
</button>
<button onClick={saveAsSourceDefault} disabled={!sourceId}
className="border border-dashed border-gray-200 text-gray-400 hover:text-gray-600 rounded px-2 py-0.5 disabled:opacity-40"
title="Use this layout as the default for new versions of this source">
Set source default
</button>
{activeLayoutId !== null && (
<button onClick={resetLayout} className="text-gray-300 hover:text-red-400">Reset</button>
)}
</>
)}
</div>
<div className="w-px h-4 bg-gray-200 shrink-0" />
{/* Expand group */}
<div className="flex items-center gap-1.5">
<span className="text-gray-400 uppercase tracking-wide" style={{fontSize:'10px'}}>Expand</span>
{[0, 1, 2, 3].map(d => (
<button key={d} onClick={() => applyDepth(d)}
className={`border rounded px-1.5 py-0.5 transition-colors
${expandDepthRef.current === d ? 'border-blue-300 text-blue-600 bg-blue-50' : 'border-gray-200 text-gray-500 hover:border-gray-400'}`}>
{d}
</button>
))}
</div>
<div className="w-px h-4 bg-gray-200 shrink-0" />
{/* Data group */}
<div className="flex items-center gap-1.5">
<button onClick={() => initViewer(versionId, sourceId)} disabled={loading || !versionId}
className="border border-gray-200 rounded px-2 py-0.5 text-gray-500 hover:bg-gray-50 disabled:opacity-40">
{loading ? 'Loading…' : 'Refresh data'}
</button>
<button onClick={openLog} disabled={!versionId}
className="border border-gray-200 rounded px-2 py-0.5 text-gray-500 hover:bg-gray-50 disabled:opacity-40">
Change log
</button>
</div>
{msg && (
<span className={`ml-2 text-xs font-medium px-2 py-0.5 rounded flex items-center gap-1.5 ${msg.type === 'error' ? 'bg-red-50 text-red-600' : 'bg-green-50 text-green-600'}`}>
{msg.text}
{msg.type === 'error' && (
<button onClick={() => setMsg(null)} className="opacity-60 hover:opacity-100 leading-none">×</button>
)}
</span>
)}
</div>
{/* History modal */}
{showLog && (
<div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40" onClick={() => setShowLog(false)}>
<div className="bg-white rounded-lg shadow-xl w-full max-w-4xl mx-4 flex flex-col max-h-[80vh]" onClick={e => e.stopPropagation()}>
<div className="flex items-center justify-between px-5 py-3 border-b border-gray-200 shrink-0">
<span className="font-medium text-gray-700 text-sm">Change History</span>
<button onClick={() => setShowLog(false)} className="text-gray-400 hover:text-gray-600 text-lg leading-none">×</button>
</div>
<div className="overflow-y-auto flex-1">
{logLoading ? (
<div className="p-8 text-center text-sm text-gray-400">Loading</div>
) : logEntries.length === 0 ? (
<div className="p-8 text-center text-sm text-gray-400">No log entries yet.</div>
) : (
<table className="w-full text-xs border-collapse">
<thead className="sticky top-0 bg-gray-50 text-gray-400 uppercase tracking-wide" style={{fontSize:'10px'}}>
<tr>
<th className="text-left px-4 py-2 font-medium w-32">Time</th>
<th className="text-left px-4 py-2 font-medium w-24">Op</th>
<th className="text-left px-4 py-2 font-medium">Slice</th>
<th className="text-left px-4 py-2 font-medium">Note</th>
<th className="text-right px-4 py-2 font-medium w-16">Rows</th>
<th className="px-4 py-2 w-16"></th>
</tr>
</thead>
<tbody>
{logEntries.map(entry => (
<tr key={entry.id} className="border-t border-gray-100 hover:bg-gray-50">
<td className="px-4 py-2 text-gray-400 whitespace-nowrap">{fmtStamp(entry.stamp)}</td>
<td className="px-4 py-2">
<span className={`px-1.5 py-0.5 rounded text-xs font-medium ${opBadge(entry.operation)}`}>
{entry.operation}
</span>
</td>
<td className="px-4 py-2 text-gray-600 font-mono">{fmtSlice(entry.slice)}</td>
<td className="px-4 py-2 text-gray-600 max-w-xs">
{editingNote?.id === entry.id ? (
<div className="flex items-center gap-1">
<input autoFocus value={editingNote.text}
onChange={e => setEditingNote(n => ({ ...n, text: e.target.value }))}
onKeyDown={e => {
if (e.key === 'Enter') saveNote(entry.id, editingNote.text)
if (e.key === 'Escape') setEditingNote(null)
}}
className="border border-blue-300 rounded px-1.5 py-0.5 text-xs flex-1 focus:outline-none" />
<button onClick={() => saveNote(entry.id, editingNote.text)} className="text-blue-600 hover:text-blue-800"></button>
<button onClick={() => setEditingNote(null)} className="text-gray-400 hover:text-gray-600"></button>
</div>
) : (
<span onClick={() => setEditingNote({ id: entry.id, text: entry.note || '' })}
className="cursor-text hover:bg-blue-50 rounded px-1 -mx-1 block truncate"
title={entry.note || 'Click to add note'}>
{entry.note || <span className="text-gray-300 italic">add note</span>}
</span>
)}
</td>
<td className="px-4 py-2 text-right text-gray-500 tabular-nums">{entry.row_count ?? '—'}</td>
<td className="px-4 py-2">
<button
onClick={() => undoEntry(entry.id)}
disabled={undoingId === entry.id}
className="text-xs border border-red-200 text-red-400 hover:text-red-600 hover:border-red-400 rounded px-2 py-0.5 disabled:opacity-40 whitespace-nowrap">
{undoingId === entry.id ? '…' : 'Undo'}
</button>
</td>
</tr>
))}
</tbody>
</table>
)}
</div>
</div>
</div>
)}
{/* Main area */}
<div className="flex-1 flex min-h-0">
{/* Perspective viewer */}
<div className="relative flex-1 min-w-0">
{loading && (
<div className="absolute inset-0 flex flex-col items-center justify-center bg-gray-50 z-10 gap-2">
<span className="text-sm text-gray-400">Loading</span>
{loadProgress && (
<>
<span className="text-xs text-gray-400 font-mono">
{fmtBytes(loadProgress.received)}
{loadProgress.total ? ` / ${fmtBytes(loadProgress.total)}` : ''}
</span>
{loadProgress.total > 0 && (
<div className="w-48 h-1 bg-gray-200 rounded overflow-hidden">
<div
className="h-full bg-blue-400 transition-all"
style={{ width: `${Math.min(100, (loadProgress.received / loadProgress.total) * 100)}%` }}
/>
</div>
)}
</>
)}
</div>
)}
{!loading && largeDataset && (
<div className="absolute top-2 left-1/2 -translate-x-1/2 z-10 bg-amber-50 border border-amber-200 text-amber-800 text-xs px-3 py-1.5 rounded shadow-sm">
Large dataset pivot may take a moment to render
</div>
)}
<perspective-viewer ref={viewerRef} style={{ position: 'absolute', inset: 0 }} />
</div>
{/* Drag handle */}
<div onMouseDown={onDragStart} className="w-1 shrink-0 cursor-col-resize hover:bg-blue-400 bg-transparent transition-colors" />
{/* Operation panel */}
<div className="shrink-0 border-l border-gray-200 bg-white flex flex-col overflow-y-auto text-xs" style={{ width: panelWidth }}>
<div className="p-3 border-b border-gray-100">
<div className="font-medium text-gray-400 uppercase tracking-wide mb-2" style={{fontSize:'10px'}}>Slice</div>
{!hasSlice ? (
<div className="text-gray-300 italic">Click a pivot row to select a slice</div>
) : (
<div className="flex flex-col gap-1">
{Object.entries(slice).map(([k, v]) => (
<div key={k} className="text-gray-700">
<span className="text-gray-400">{k}</span> = <span className="font-medium">{v}</span>
</div>
))}
<button onClick={() => setSlice({})} className="text-gray-300 hover:text-red-500 mt-1 text-left">Clear</button>
</div>
)}
</div>
{hasSlice && currentTotals?.byIter?.length > 0 && (
<div className="px-3 py-2 border-b border-gray-100">
<div className="font-medium text-gray-400 uppercase tracking-wide mb-1.5" style={{fontSize:'10px'}}>Current</div>
<table className="w-full text-xs">
<thead>
<tr className="text-gray-400" style={{fontSize:'10px'}}>
<th className="text-left font-normal pb-1"></th>
{currentTotals.valueCol && <th className="text-right font-normal pb-1 pl-1">{currentTotals.valueCol}</th>}
{currentTotals.unitsCol && <th className="text-right font-normal pb-1 pl-1">{currentTotals.unitsCol}</th>}
{currentTotals.valueCol && currentTotals.unitsCol && <th className="text-right font-normal pb-1 pl-1">price</th>}
</tr>
</thead>
<tbody>
{currentTotals.byIter.map(r => (
<tr key={r.iter}>
<td className="text-gray-500 capitalize pr-1">{r.iter}</td>
{currentTotals.valueCol && <td className="text-right font-mono text-gray-700 pl-1">{fmtNum(r.value)}</td>}
{currentTotals.unitsCol && <td className="text-right font-mono text-gray-700 pl-1">{fmtNum(r.units)}</td>}
{currentTotals.valueCol && currentTotals.unitsCol && <td className="text-right font-mono text-gray-700 pl-1">{fmtNum(r.units ? r.value / r.units : null, 4)}</td>}
</tr>
))}
{currentTotals.byIter.length > 1 && (
<tr className="border-t border-gray-100">
<td className="text-gray-600 font-medium pt-1 pr-1">total</td>
{currentTotals.valueCol && <td className="text-right font-mono font-semibold text-gray-800 pt-1 pl-1">{fmtNum(currentTotals.total.value)}</td>}
{currentTotals.unitsCol && <td className="text-right font-mono font-semibold text-gray-800 pt-1 pl-1">{fmtNum(currentTotals.total.units)}</td>}
{currentTotals.valueCol && currentTotals.unitsCol && <td className="text-right font-mono font-semibold text-gray-800 pt-1 pl-1">{fmtNum(currentTotals.total.units ? currentTotals.total.value / currentTotals.total.units : null, 4)}</td>}
</tr>
)}
</tbody>
</table>
</div>
)}
{hasSlice && (
<>
<div className="flex border-b border-gray-100">
{['scale', 'recode', 'clone'].map(op => (
<button key={op} onClick={() => setActiveOp(op)}
className={`flex-1 py-2 capitalize ${activeOp === op ? 'border-b-2 border-blue-500 text-blue-600 font-medium' : 'text-gray-400 hover:text-gray-600'}`}>
{op}
</button>
))}
</div>
<div className="p-3 flex flex-col gap-2.5">
{activeOp === 'scale' && <>
{/* Mode toggle */}
<div className="flex rounded border border-gray-200 overflow-hidden">
{[['target','= Target'],['delta','Δ Increment']].map(([m, label]) => (
<button key={m} onClick={() => { setScaleMode(m); setScaleValue(''); setScaleUnits(''); setScalePrice('') }}
className={`flex-1 py-1 text-xs ${scaleMode === m ? 'bg-blue-600 text-white' : 'bg-white text-gray-500 hover:bg-gray-50'}`}>
{label}
</button>
))}
</div>
{currentTotals?.valueCol && (
<Row label={currentTotals.valueCol}>
<input type="number" step="any" value={scaleValue}
onChange={e => setScaleValue(e.target.value)}
placeholder={scaleMode === 'target' ? 'target total' : '+ / amount'}
className={inp} />
</Row>
)}
{currentTotals?.unitsCol && (
<Row label={currentTotals.unitsCol}>
<input type="number" step="any" value={scaleUnits}
onChange={e => setScaleUnits(e.target.value)}
placeholder={scaleMode === 'target' ? 'target total' : '+ / amount'}
className={inp} />
</Row>
)}
{scaleMode === 'target' && currentTotals?.valueCol && currentTotals?.unitsCol && (
<Row label="price">
<input type="number" step="any" value={scalePrice}
onChange={e => setScalePrice(e.target.value)}
placeholder="target price (holds units)"
className={inp} />
</Row>
)}
{scaleMode === 'delta' && (
<label className="flex items-center gap-2 text-gray-500">
<input type="checkbox" checked={scalePct} onChange={e => setScalePct(e.target.checked)} /> % of slice
</label>
)}
<Row label="Note"><input value={scaleNote} onChange={e => setScaleNote(e.target.value)} placeholder="optional" className={inp} /></Row>
<Submit onClick={() => submitOp('scale')}>Apply Scale</Submit>
</>}
{activeOp === 'recode' && <>
<p className="text-gray-400">New values for dimensions to replace. Leave blank to keep.</p>
{dimCols.map(c => (
<Row key={c.cname} label={c.cname}>
<input value={recodeSet[c.cname] || ''} onChange={e => setRecodeSet(s => ({ ...s, [c.cname]: e.target.value }))}
placeholder={slice[c.cname] || '—'} className={`${inp} font-mono`} />
</Row>
))}
<Row label="Note"><input value={recodeNote} onChange={e => setRecodeNote(e.target.value)} placeholder="optional" className={inp} /></Row>
<Submit onClick={() => submitOp('recode')}>Apply Recode</Submit>
</>}
{activeOp === 'clone' && <>
<p className="text-gray-400">Override dimensions on cloned rows. Leave blank to keep.</p>
{dimCols.map(c => (
<Row key={c.cname} label={c.cname}>
<input value={cloneSet[c.cname] || ''} onChange={e => setCloneSet(s => ({ ...s, [c.cname]: e.target.value }))}
placeholder={slice[c.cname] || '—'} className={`${inp} font-mono`} />
</Row>
))}
<Row label="Scale"><input type="number" step="any" value={cloneScale} onChange={e => setCloneScale(e.target.value)} className={inp} /></Row>
<Row label="Note"><input value={cloneNote} onChange={e => setCloneNote(e.target.value)} placeholder="optional" className={inp} /></Row>
<Submit onClick={() => submitOp('clone')}>Apply Clone</Submit>
</>}
</div>
</>
)}
</div>
</div>
</div>
)
}
const inp = 'border border-gray-200 rounded px-2 py-1 text-xs flex-1 bg-white min-w-0'
function fmtBytes(n) {
if (n < 1024) return `${n} B`
if (n < 1048576) return `${(n / 1024).toFixed(1)} KB`
return `${(n / 1048576).toFixed(1)} MB`
}
function fmtNum(n, decimals = 2) {
if (n == null || !isFinite(n)) return '—'
return n.toLocaleString(undefined, { maximumFractionDigits: decimals })
}
function fmtStamp(stamp) {
return new Date(stamp).toLocaleString(undefined, { month: 'short', day: 'numeric', hour: 'numeric', minute: '2-digit' })
}
function fmtSlice(slice) {
if (!slice || !Object.keys(slice).length) return '—'
return Object.entries(slice).map(([k, v]) => `${k} = ${v}`).join(', ')
}
const OP_BADGE = {
baseline: 'bg-gray-100 text-gray-600',
reference: 'bg-blue-50 text-blue-600',
scale: 'bg-green-50 text-green-700',
recode: 'bg-amber-50 text-amber-700',
clone: 'bg-purple-50 text-purple-700',
}
function opBadge(op) { return OP_BADGE[op] || 'bg-gray-100 text-gray-500' }
function Row({ label, children }) {
return (
<div className="flex items-center gap-2">
<span className="text-gray-400 w-14 shrink-0 truncate" title={label}>{label}</span>
{children}
</div>
)
}
function Submit({ onClick, children }) {
return (
<button onClick={onClick} className="mt-1 bg-blue-600 text-white text-xs px-3 py-1.5 rounded hover:bg-blue-700 w-full">
{children}
</button>
)
}