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import { stripAnsi } from '../components/BashResult'
import { isTooManyRequestsError, parseQuotaError } from '../lib/quotaErrors'
import { createToolMessage } from '../lib/toolMessageFormatter'
import type { MessageEntry } from '../lib/types'
import { isHiddenResultTool } from '../lib/utils'
import type { MessageRouter } from './useMessageRouter'
export function parseQaItems(content: string): { question: string; answer: string }[] {
const items: { question: string; answer: string }[] = []
const answerSection = content.match(/^User answered:(.*)/s)
if (answerSection) {
const pairs = answerSection[1].matchAll(/"([^"]+)"\s*=\s*"([^"]+)"/g)
for (const [, q, a] of pairs) items.push({ question: q, answer: a })
}
return items
}
export function useChatState(router: MessageRouter) {
const [messages, setMessages] = useState<MessageEntry[]>([])
const [streamingText, setStreamingText] = useState('')
const [streamingThinking, setStreamingThinking] = useState('')
const [isRunning, setIsRunning] = useState(false)
const streamingTextRef = useRef('')
const streamingThinkingRef = useRef('')
// ── Session lifecycle ─────────────────────────────────────────────
router.register('session', (_msg) => {
setMessages((prev) => {
const lastSkillIdx = [...prev]
.reverse()
.findIndex((m) => m.role === 'skill-imported' && (m as { restartState?: string }).restartState === 'restarting')
if (lastSkillIdx === -1) return prev
const idx = prev.length - 1 - lastSkillIdx
return prev.map((m, i) => (i === idx ? { ...m, restartState: 'active' } : m))
})
})
router.register('agentRestarting', () => {
setMessages((prev) => {
const lastSkillIdx = [...prev]
.reverse()
.findIndex((m) => m.role === 'skill-imported' && !(m as { restartState?: string }).restartState)
if (lastSkillIdx === -1) return prev
const idx = prev.length - 1 - lastSkillIdx
return prev.map((m, i) => (i === idx ? { ...m, restartState: 'restarting' } : m))
})
})
router.register('skillUploaded', (msg) => {
setMessages((prev) => [...prev, { role: 'skill-imported', skillName: msg.skillName as string }])
})
// ── Conversation load/switch ──────────────────────────────────────
router.register('conversationLoaded', (msg) => {
setMessages(msg.messages as MessageEntry[])
setStreamingText('')
setStreamingThinking('')
streamingTextRef.current = ''
streamingThinkingRef.current = ''
setIsRunning(false)
})
router.register('conversationSwitched', () => {
setMessages([])
setStreamingText('')
setStreamingThinking('')
streamingTextRef.current = ''
streamingThinkingRef.current = ''
setIsRunning(false)
})
// ── Status ────────────────────────────────────────────────────────
router.register('status', (msg) => {
Eif (msg.status === 'running') setIsRunning(true)
})
router.register('userMessage', () => {
setIsRunning(true)
})
// ── Streaming ─────────────────────────────────────────────────────
router.register('delta', (msg) => {
Iif (msg.blockType === 'thinking' && msg.field === 'thinking') {
streamingThinkingRef.current += msg.content as string
setStreamingThinking(streamingThinkingRef.current)
E} else if (msg.blockType === 'text' && msg.field === 'text') {
streamingTextRef.current += msg.content as string
setStreamingText(streamingTextRef.current)
}
})
router.register('assistant', () => {
const thinking = streamingThinkingRef.current
const text = streamingTextRef.current
streamingThinkingRef.current = ''
streamingTextRef.current = ''
setStreamingText('')
setStreamingThinking('')
setMessages((prev) => {
const next = [...prev]
Iif (thinking) next.push({ role: 'thinking', content: thinking })
Eif (text) next.push({ role: 'assistant', content: text })
return next
})
})
// ── Tool ──────────────────────────────────────────────────────────
router.register('tool', (msg) => {
if (msg.status === 'running') {
const input = msg.input as Record<string, unknown>
const toolMessage = createToolMessage(msg.name as string, msg.toolUseId as string, input)
if (msg.name === 'FileEdit' || msg.name === 'Edit') {
const oldString = String(input.old_string ?? '')
const newString = String(input.new_string ?? '')
const totalLines = oldString.split('\n').length + newString.split('\n').length
if (totalLines > 6) toolMessage.diffAutoOpened = true
}
setMessages((prev) => {
let promptIdx = -1
for (let i = prev.length - 1; i >= 0; i--) {
const m = prev[i]
Iif (m.role === 'tool' && !m.toolUseId && m.summary === toolMessage.summary) {
promptIdx = i
break
}
}
Iif (promptIdx !== -1) {
const updated = [...prev]
const entry = updated[promptIdx]
if (entry.role === 'tool') updated[promptIdx] = { ...entry, toolUseId: msg.toolUseId as string }
return updated
}
return [...prev, toolMessage]
})
} else if (msg.status === 'done') {
setMessages((prev) => {
let idx = -1
for (let i = prev.length - 1; i >= 0; i--) {
const m = prev[i]
Eif (m.role === 'tool' && m.toolUseId === msg.toolUseId) {
idx = i
break
}
}
const lastMsg = prev[prev.length - 1]
const lastTool = lastMsg?.role === 'tool' ? lastMsg : null
const entry = idx !== -1 ? prev[idx] : lastTool && !lastTool.result ? lastTool : null
const entryIdx = idx !== -1 ? idx : prev.length - 1
Eif (entry?.role === 'tool') {
const updated = [...prev]
const content = msg.content as string
const isError = msg.isError as boolean
let result: string | null
if (['FileRead', 'Edit', 'FileEdit', 'Write', 'FileWrite', 'WebFetch'].includes(entry.name)) {
result = null
} else if (entry.name === 'Glob' && !isError) {
result = content
} else if (entry.name === 'Grep' && !isError) {
result = content
} else if (entry.name === 'Bash') {
result = stripAnsi(content).slice(0, 5000)
} else if (
[
'TodoWrite',
'Skill',
'EnterPlanMode',
'ExitPlanMode',
'mcp__ide-vs-code__build_app',
'build_app',
'mcp__ide-vs-code__get_problems',
'get_problems',
].includes(entry.name)
) {
result = null
} else if (isHiddenResultTool(entry.name)) {
result = null
updated[entryIdx] = { ...entry, result, isError, apiResult: content.slice(0, 300) }
return updated
} else if (entry.name === 'AskUserQuestion' && !isError) {
result = null
const qaItems = parseQaItems(content)
Eif (qaItems.length > 0) {
updated[entryIdx] = { ...entry, result, isError, qaItems }
return updated
}
I} else if ((entry.name === 'mcp__ide-vs-code__get_problems' || entry.name === 'get_problems') && !isError) {
result = null
try {
const parsed = JSON.parse(content)
if (Array.isArray(parsed)) {
updated[entryIdx] = { ...entry, result, isError, problems: parsed }
return updated
}
} catch {}
} else {
result = content.slice(0, 500)
}
updated[entryIdx] = { ...entry, result, isError }
return updated
}
return [
...prev,
{
role: (msg.isError ? 'error' : 'info') as 'error' | 'info',
content: (msg.content as string).slice(0, 500),
},
]
})
E} else if (msg.status === 'error') {
setMessages((prev) => [...prev, { role: 'error', content: `${msg.name}: ${msg.message}` }])
}
})
// ── Result ────────────────────────────────────────────────────────
router.register('result', (msg) => {
setIsRunning(false)
const appendUsage = (next: MessageEntry[], usage?: Record<string, unknown>) => {
Iif (usage) {
next.push({
role: 'token-stats',
inputTokens: usage.inputTokens as number,
outputTokens: usage.outputTokens as number,
bzTokens: usage.bzTokens as number,
interactionCount: usage.interactionCount as number,
})
}
}
if (msg.status === 'aborted') {
const thinking = streamingThinkingRef.current
const text = streamingTextRef.current
streamingThinkingRef.current = ''
streamingTextRef.current = ''
setStreamingThinking('')
setStreamingText('')
setMessages((prev) => {
const next = [...prev]
Iif (thinking) next.push({ role: 'thinking', content: thinking })
Eif (text) next.push({ role: 'assistant', content: text })
const last = next[next.length - 1]
Iif (last?.role === 'tool' && !last.result) {
next[next.length - 1] = { ...last, result: 'Tool interrupted', isError: true }
}
next.push({ role: 'info', content: 'Interrupted' })
appendUsage(next, msg.usage as Record<string, unknown> | undefined)
return next
})
}
if (msg.status === 'error') {
const error = msg.error as string
const quota = parseQuotaError(error)
if (quota) {
setMessages((prev) => {
const next: MessageEntry[] = [
...prev,
{
role: 'quota-error',
kind: quota.kind,
used: quota.used,
limit: quota.limit,
window: quota.window,
resetAt: quota.resetAt?.toISOString() ?? null,
},
]
appendUsage(next, msg.usage as Record<string, unknown> | undefined)
return next
})
} else if (isTooManyRequestsError(error)) {
setMessages((prev) => {
const next: MessageEntry[] = [...prev, { role: 'unavailable-error' }]
appendUsage(next, msg.usage as Record<string, unknown> | undefined)
return next
})
} else {
setMessages((prev) => {
const next: MessageEntry[] = [...prev, { role: 'error', content: error }]
appendUsage(next, msg.usage as Record<string, unknown> | undefined)
return next
})
}
}
if (msg.status === 'success') {
if (msg.output) {
setMessages((prev) => {
const next: MessageEntry[] = [...prev, { role: 'info', content: msg.output as string }]
appendUsage(next, msg.usage as Record<string, unknown> | undefined)
return next
})
} else if (msg.usage) {
const usage = msg.usage as Record<string, unknown>
setMessages((prev) => [
...prev,
{
role: 'token-stats',
inputTokens: usage.inputTokens as number,
outputTokens: usage.outputTokens as number,
bzTokens: usage.bzTokens as number,
interactionCount: usage.interactionCount as number,
},
])
}
}
})
return {
messages,
setMessages,
streamingText,
streamingThinking,
isRunning,
setIsRunning,
}
}
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