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shared voice framework. * * This hook wraps `useVoiceCall` from `@/lib/voice` and layers all the * number-line domain logic on top: conference calls, transfers, * explorations, games, story evolution, player identification, etc. * * The shared framework handles: WebRTC, audio, microphone, ring tone, * mode management, timer, data channel routing, and cleanup. * * This file handles: domain-specific tool dispatch (returning ToolCallResult), * conference/speaker state, transfer logic, exploration narration, * game state, session history, and the domain-specific public API. */ import { useCallback, useRef, useState, useMemo } from 'react' import { createId } from '@paralleldrive/cuid2' import { useVoiceCall } from '@/lib/voice/useVoiceCall' import type { VoiceSessionConfig, ToolCallResult, CallState as BaseCallState, UseVoiceCallReturn, } from '@/lib/voice/types' import { sendSystemMessage as sendSystemMessageHelper } from '@/lib/voice/toolCallHelpers' import type { GeneratedScenario, TranscriptEntry } from './generateScenario' import type { ChildProfile } from './childProfile' import { EXPLORATION_IDS, CONSTANT_IDS } from './explorationRegistry' import { GAME_MAP } from './gameRegistry' import { resolveMode, type ModeId, type ModeContext, type SessionActivity } from './sessionModes' import { getTraitSummary } from './generateNumberPersonality' import type { MomentSnapshot, PostcardManifest, RankedMoment, } from '@/db/schema/number-line-postcards' /** A moment bookmarked silently by the agent during the call. */ export interface MarkedMoment { caption: string category: 'question' | 'discovery' | 'game' | 'exploration' | 'conversation' | 'conference' significance: number snapshot: MomentSnapshot transcriptExcerpt: string timestampMs: number } export type CallState = BaseCallState | 'transferring' // ── Levenshtein fuzzy matching for identify_caller ────────────────────────── function levenshtein(a: string, b: string): number { const m = a.length const n = b.length const dp: number[] = Array.from({ length: n + 1 }, (_, i) => i) for (let i = 1; i <= m; i++) { let prev = dp[0] dp[0] = i for (let j = 1; j <= n; j++) { const temp = dp[j] dp[j] = a[i - 1] === b[j - 1] ? prev : 1 + Math.min(prev, dp[j], dp[j - 1]) prev = temp } } return dp[n] } function fuzzyMatchPlayer( input: string, players: Array<{ id: string; name: string; emoji: string }> ): { id: string; name: string } | null { if (players.length === 0) return null const norm = input.toLowerCase().trim() if (!norm) return null const exact = players.find((p) => p.name.toLowerCase() === norm) if (exact) return exact const prefixMatches = players.filter((p) => p.name.toLowerCase().startsWith(norm)) if (prefixMatches.length === 1) return prefixMatches[0] let bestDist = Infinity let bestPlayer: { id: string; name: string } | null = null for (const p of players) { const dist = levenshtein(norm, p.name.toLowerCase()) if (dist < bestDist) { bestDist = dist bestPlayer = p } } if (bestPlayer) { const maxLen = Math.max(norm.length, bestPlayer.name.length) if (bestDist <= Math.ceil(maxLen * 0.4)) return bestPlayer } return null } /** A single mode transition recorded for debug overlay. */ export interface ModeTransition { from: ModeId | 'idle' to: ModeId action: string timestamp: number tools: string[] } /** Debug info exposed to the UI for the voice state machine overlay. */ export interface ModeDebugInfo { current: ModeId previous: ModeId | null transitions: ModeTransition[] } /** A record of a completed call, preserved across calls within a session. */ interface CallRecord { number: number conferenceNumbers: number[] transcripts: TranscriptEntry[] scenario: GeneratedScenario | null timestamp: number } function formatCallHistory(history: CallRecord[], currentNumber: number): string { const lines: string[] = [ '[System — The child has had previous conversations this session. Here is what happened:\n', ] for (const record of history.slice(-5)) { const isSelf = record.number === currentNumber const header = isSelf ? `=== Your earlier call (you are ${record.number}) ===` : `=== Child's call with Number ${record.number} ===` lines.push(header) const transcripts = record.transcripts.slice(-10) for (const t of transcripts) { const speaker = t.role === 'child' ? 'Child' : `Number ${record.number}` lines.push(`${speaker}: "${t.text}"`) } lines.push('') } const calledBefore = history.some((r) => r.number === currentNumber) if (calledBefore) { lines.push( 'The child is calling you AGAIN. Greet them warmly — "Hey, you\'re back!" ' + 'Pick up where you left off naturally. Reference what you discussed before. ' + 'If they talked to other numbers, you may have heard about it on the number line.]' ) } else { lines.push( "This is a new call to a number the child hasn't called before. " + 'If the child mentions talking to other numbers, you may have heard about it on the number line.]' ) } return lines.join('\n') } const BASE_TIMEOUT_MS = 2 * 60 * 1000 const EXTENSION_MS = 2 * 60 * 1000 const WARNING_BEFORE_END_MS = 15 * 1000 const HANG_UP_DELAY_MS = 2000 const TRANSFER_DELAY_MS = 1500 interface UseRealtimeVoiceOptions { onTransfer?: (targetNumber: number) => void onStartExploration?: (constantId: string) => void onPauseExploration?: () => void onResumeExploration?: () => void onSeekExploration?: (segmentIndex: number) => void onEndExploration?: () => void onLookAt?: (center: number, range: number) => void onIndicate?: ( numbers: number[], range?: { from: number; to: number }, durationSeconds?: number, persistent?: boolean ) => void onGameStart?: (gameId: string, params: Record<string, unknown>) => void onGameEnd?: (gameId: string) => void onSetLabelStyle?: (scale: number, minOpacity: number) => void isExplorationActiveRef?: React.RefObject<boolean> onPlayerIdentified?: (playerId: string) => void /** Returns the current number line scene snapshot for moment capture. */ getSceneSnapshot?: () => SceneSnapshot } export interface SceneSnapshot { viewport: { center: number; pixelsPerUnit: number } indicator?: { numbers: number[]; range?: { from: number; to: number } } gameTarget?: { value: number; emoji: string } activeExplorationId?: string | null demoProgress?: number } interface DialOptions { recommendedExplorations?: string[] playerId?: string availablePlayers?: Array<{ id: string; name: string; emoji: string }> } interface UseRealtimeVoiceReturn { state: CallState error: string | null errorCode: string | null dial: (number: number, options?: DialOptions) => void profileFailed: boolean hangUp: () => void timeRemaining: number | null isSpeaking: boolean transferTarget: number | null conferenceNumbers: number[] currentSpeaker: number | null removeFromCall: (numberToRemove: number) => void sendSystemMessage: (text: string, promptResponse?: boolean) => void setNarrationPlaying: (playing: boolean) => void currentInstructions: string | null modeDebug: ModeDebugInfo } export function useRealtimeVoice(options?: UseRealtimeVoiceOptions): UseRealtimeVoiceReturn { // Stable refs for callbacks const onTransferRef = useRef(options?.onTransfer) onTransferRef.current = options?.onTransfer const onStartExplorationRef = useRef(options?.onStartExploration) onStartExplorationRef.current = options?.onStartExploration const onPauseExplorationRef = useRef(options?.onPauseExploration) onPauseExplorationRef.current = options?.onPauseExploration const onResumeExplorationRef = useRef(options?.onResumeExploration) onResumeExplorationRef.current = options?.onResumeExploration const onSeekExplorationRef = useRef(options?.onSeekExploration) onSeekExplorationRef.current = options?.onSeekExploration const onEndExplorationRef = useRef(options?.onEndExploration) onEndExplorationRef.current = options?.onEndExploration const onLookAtRef = useRef(options?.onLookAt) onLookAtRef.current = options?.onLookAt const onIndicateRef = useRef(options?.onIndicate) onIndicateRef.current = options?.onIndicate const onGameStartRef = useRef(options?.onGameStart) onGameStartRef.current = options?.onGameStart const onGameEndRef = useRef(options?.onGameEnd) onGameEndRef.current = options?.onGameEnd const onSetLabelStyleRef = useRef(options?.onSetLabelStyle) onSetLabelStyleRef.current = options?.onSetLabelStyle const onPlayerIdentifiedRef = useRef(options?.onPlayerIdentified) onPlayerIdentifiedRef.current = options?.onPlayerIdentified const getSceneSnapshotRef = useRef(options?.getSceneSnapshot) getSceneSnapshotRef.current = options?.getSceneSnapshot const isExplorationActiveRef = options?.isExplorationActiveRef // ── Domain-specific state ── const [transferTarget, setTransferTarget] = useState<number | null>(null) const [profileFailed, setProfileFailed] = useState(false) const [conferenceNumbers, setConferenceNumbers] = useState<number[]>([]) const conferenceNumbersRef = useRef<number[]>([]) const [currentSpeaker, setCurrentSpeaker] = useState<number | null>(null) const currentSpeakerRef = useRef<number | null>(null) const pendingSpeakerRef = useRef<number | null>(null) const pendingSpeakerTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null) const activePlayerIdRef = useRef<string | undefined>(undefined) const availablePlayersRef = useRef<Array<{ id: string; name: string; emoji: string }>>([]) const activeGameIdRef = useRef<string | null>(null) const gameStateRef = useRef<unknown>(null) const sessionActivityRef = useRef<SessionActivity>({ gamesPlayed: [], explorationsLaunched: [] }) const markedMomentsRef = useRef<MarkedMoment[]>([]) const postcardSentRef = useRef(false) const sessionIdRef = useRef<string>(createId()) const sharedHistoryRef = useRef<import('@/lib/number-line/shared-history').SharedHistory | null>( null ) const callStartTimeRef = useRef(0) const narrationPlayingRef = useRef(false) const lastResumeTimestampRef = useRef(0) const pendingExplorationRef = useRef< { type: 'start'; constantId: string } | { type: 'resume' } | null >(null) const responseCreatedMsRef = useRef(0) // Refs for voiceCall methods — set after hook is created (avoids circular dep with config) const extendTimerRef = useRef<(() => boolean) | null>(null) const voiceCallRef = useRef<UseVoiceCallReturn | null>(null) // Scenario + transcript + call state const childProfileRef = useRef<ChildProfile | undefined>(undefined) const profileFailedRef = useRef(false) const scenarioRef = useRef<GeneratedScenario | null>(null) const transcriptsRef = useRef<TranscriptEntry[]>([]) const calledNumberRef = useRef<number>(0) const sessionHistoryRef = useRef<CallRecord[]>([]) const extensionUsedRef = useRef(false) // Mirrors framework's extension state for ModeContext const windingDownRequestedRef = useRef(false) const goodbyeRequestedRef = useRef(false) const childHasSpokenRef = useRef(false) const familiarizingResponseCountRef = useRef(0) const momentNudgeSentRef = useRef(false) const defaultModeResponseCountRef = useRef(0) // Domain-specific call state (extends base CallState with 'transferring') const [domainState, setDomainState] = useState<'transferring' | null>(null) const transferTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null) // Recommended explorations for the current dial const recommendedExplorationsRef = useRef<string[] | undefined>(undefined) const setPendingSpeaker = useCallback((speaker: number) => { pendingSpeakerRef.current = speaker if (pendingSpeakerTimerRef.current) clearTimeout(pendingSpeakerTimerRef.current) pendingSpeakerTimerRef.current = setTimeout(() => { pendingSpeakerTimerRef.current = null if (pendingSpeakerRef.current === speaker) { pendingSpeakerRef.current = null currentSpeakerRef.current = speaker setCurrentSpeaker(speaker) } }, 1000) }, []) /** Build a ModeContext from current refs. */ const buildModeContext = useCallback( (): ModeContext => ({ calledNumber: calledNumberRef.current, scenario: scenarioRef.current, childProfile: childProfileRef.current, profileFailed: profileFailedRef.current, conferenceNumbers: conferenceNumbersRef.current, currentSpeaker: currentSpeakerRef.current, activeGameId: activeGameIdRef.current, gameState: gameStateRef.current, availablePlayers: availablePlayersRef.current, currentInstructions: null, sessionActivity: sessionActivityRef.current, extensionAvailable: !extensionUsedRef.current, momentCount: markedMomentsRef.current.length, postcardSent: postcardSentRef.current, sharedHistory: sharedHistoryRef.current, }), [] ) // ── Session end helper (triggers moment cull) ── const sessionEndedRef = useRef(false) const endVoiceSession = useCallback(() => { if (sessionEndedRef.current) return sessionEndedRef.current = true fetch('/api/number-line/sessions/end', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ sessionId: sessionIdRef.current }), }).catch((err) => console.warn('[moments] session end failed:', err)) }, []) // ── Tool call handler ── // Returns ToolCallResult for each tool, or null for unhandled. // NOTE: Many number-line tools need direct data channel access for async patterns // (identify_caller, evolve_story). For these, we use the dc ref from the shared hook. const onToolCall = useCallback( (name: string, args: Record<string, unknown>, _ctx: ModeContext): ToolCallResult | null => { // request_more_time if (name === 'request_more_time') { const extended = extendTimerRef.current?.() if (!extended) { return { output: { success: false, error: 'No extension available.' } } } extensionUsedRef.current = true const shouldExitMode = windingDownRequestedRef.current windingDownRequestedRef.current = false return { output: { success: true, message: 'Time extended. Do NOT mention this to the child — just keep the conversation going naturally.', }, exitMode: shouldExitMode || undefined, } } // hang_up — route through farewell mode if there are unsent moments if (name === 'hang_up') { if (markedMomentsRef.current.length > 0 && !postcardSentRef.current) { return { output: { success: true, message: 'Before you go, you have a chance to send the child a postcard.', }, enterMode: 'farewell', } } endVoiceSession() return { output: { success: true }, isHangUp: true } } // skip_postcard — child declined or call wasn't postcard-worthy if (name === 'skip_postcard') { return { output: { success: true }, enterMode: 'hanging_up', } } // transfer_call if (name === 'transfer_call') { const targetNumber = Number(args.target_number) if (!isFinite(targetNumber)) { return { output: { success: false, error: 'Invalid number' } } } return { output: { success: true, message: `Transferring to ${targetNumber}` }, isTransfer: true, transferTarget: targetNumber, promptResponse: false, } } // add_to_call (conference) if (name === 'add_to_call') { const raw = args.target_numbers if (!Array.isArray(raw) || raw.length === 0) { return { output: { success: false, error: 'Invalid target_numbers array' } } } const targetNumbers = raw.map((v: unknown) => Number(v)).filter(isFinite) if (targetNumbers.length === 0) { return { output: { success: false, error: 'Invalid target_numbers array' } } } const existing = new Set(conferenceNumbersRef.current) const newNumbers = targetNumbers.filter((n) => !existing.has(n)) if (newNumbers.length === 0) { return { output: { success: true, message: 'All those numbers are already on the call!' }, } } const updated = [...conferenceNumbersRef.current, ...newNumbers] conferenceNumbersRef.current = updated setConferenceNumbers(updated) setPendingSpeaker(newNumbers[0]) currentSpeakerRef.current = newNumbers[0] return { output: { success: true, message: `${newNumbers.join(', ')} joined the call!` }, enterMode: 'conference', promptResponse: false, // We'll prompt manually after injecting intro text } } // switch_speaker if (name === 'switch_speaker') { const targetNumber = Number(args.number) if (!isFinite(targetNumber)) { return { output: { success: false, error: 'Invalid number' } } } if (!conferenceNumbersRef.current.includes(targetNumber)) { return { output: { success: false, error: `${targetNumber} is not on the call` } } } setPendingSpeaker(targetNumber) currentSpeakerRef.current = targetNumber return { output: { success: true, now_speaking_as: targetNumber } } } // start_exploration if (name === 'start_exploration') { const constantId = String(args.constant_id) if (!EXPLORATION_IDS.has(constantId)) { return { output: { success: false, error: 'Invalid constant_id' } } } // Tour explorations — auto-hang-up if (!CONSTANT_IDS.has(constantId)) { onStartExplorationRef.current?.(constantId) endVoiceSession() return { output: { success: true }, isHangUp: true } } sessionActivityRef.current.explorationsLaunched.push(constantId) pendingExplorationRef.current = { type: 'start', constantId } return { output: { success: true, message: `Exploration of ${constantId} is ready but PAUSED. Give the child a brief intro — match their energy level — then call resume_exploration to start.`, companion_rules: 'Once the animation is playing: a pre-recorded narrator tells the story. You stay SILENT during playback. ' + 'You will receive context messages showing what the narrator is saying. ' + 'If the child speaks, the animation pauses automatically — answer their question, then call resume_exploration. ' + 'If the child seems disengaged, offer choices: keep watching, see a different one, or do something else. ' + 'One brief reaction when it finishes, then move on. Do NOT narrate, announce segments, or repeat what the narrator says.', }, enterMode: 'exploration', } } // pause_exploration if (name === 'pause_exploration') { narrationPlayingRef.current = false onPauseExplorationRef.current?.() return { output: { success: true, message: 'Exploration paused' } } } // resume_exploration if (name === 'resume_exploration') { pendingExplorationRef.current = { type: 'resume' } return { output: { success: true, message: 'Exploration resumed. The narrator is speaking now — stay completely silent until the child speaks or the exploration ends.', }, promptResponse: false, } } // seek_exploration if (name === 'seek_exploration') { const segNum = Number(args.segment_number) if (!isFinite(segNum) || segNum < 1) { return { output: { success: false, error: 'Invalid segment_number' } } } onSeekExplorationRef.current?.(segNum - 1) return { output: { success: true, message: `Jumped to segment ${segNum} (paused)` } } } // end_exploration if (name === 'end_exploration') { narrationPlayingRef.current = false onEndExplorationRef.current?.() return { output: { success: true, message: "Exploration stopped. You're back in conversation mode — full tools available.", }, exitMode: true, } } // look_at if (name === 'look_at') { const center = Number(args.center) if (!isFinite(center)) { return { output: { success: false, error: 'Invalid center value' } } } const range = Number(args.range) || 20 onLookAtRef.current?.(center, Math.abs(range)) return { output: { success: true, message: `Looking at ${center} (range ${range})` } } } // evolve_story if (name === 'evolve_story') { if (!scenarioRef.current) { return { output: { success: false, error: 'No active scenario to evolve' } } } const recent = transcriptsRef.current.slice(-10) const asyncResult = fetch('/api/realtime/evolve', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ number: calledNumberRef.current, scenario: scenarioRef.current, recentTranscripts: recent, conferenceNumbers: conferenceNumbersRef.current, }), }) .then((res) => res.ok ? res.json() : Promise.reject(new Error(`API error ${res.status}`)) ) .then((data) => { if (!data.evolution) { return { text: '[System: The story is flowing well — no twist needed right now. Keep going with the current thread.]', } } const { development, newTension, suggestion } = data.evolution return { text: `[System: Story evolution — Development: ${development}. New tension: ${newTension}. Suggestion: ${suggestion}. Weave this in naturally.]`, } }) return { output: { success: true, message: 'Generating story evolution...' }, asyncResult, promptResponse: false, } } // identify_caller if (name === 'identify_caller') { const inputName = args.name as string | undefined const inputId = args.player_id as string | undefined let playerId: string | undefined if (inputName && typeof inputName === 'string') { const match = fuzzyMatchPlayer(inputName, availablePlayersRef.current) if (!match) { return { output: { success: false, error: `No matching player found for "${inputName}". Known names: ${availablePlayersRef.current.map((p) => p.name).join(', ')}. Ask the child to repeat their name.`, }, } } playerId = match.id } else if (inputId && typeof inputId === 'string') { playerId = inputId } else { return { output: { success: false, error: 'Pass the name you heard from the child.' } } } activePlayerIdRef.current = playerId const asyncResult = fetch('/api/realtime/profile', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ playerId }), }) .then((res) => res.ok ? res.json() : Promise.reject(new Error(`API error ${res.status}`)) ) .then((data) => { if (data.failed || !data.profile) { return { text: "[System: Couldn't load their profile, but that's okay — continue naturally.]", } } const profile = data.profile as ChildProfile childProfileRef.current = profile const namePart = profile.name ? `This is ${profile.name}` : 'Identified the caller' const agePart = profile.age != null ? `, age ${profile.age}` : '' const focusPart = profile.currentFocus ? `. Currently learning: ${profile.currentFocus}` : '' onPlayerIdentifiedRef.current?.(playerId!) return { text: `[System: ${namePart}${agePart}${focusPart}. Personalize the conversation for them!]`, } }) return { output: { success: true, message: 'Looking up the caller...' }, asyncResult, promptResponse: false, } } // indicate if (name === 'indicate') { const numbers: number[] = Array.isArray(args.numbers) ? ((args.numbers as unknown[]).filter( (v) => typeof v === 'number' && isFinite(v as number) ) as number[]) : [] let range: { from: number; to: number } | undefined if (args.range && typeof args.range === 'object') { const r = args.range as Record<string, unknown> if (isFinite(Number(r.from)) && isFinite(Number(r.to))) { range = { from: Number(r.from), to: Number(r.to) } } } if (numbers.length === 0 && !range) { return { output: { success: false, error: 'Must provide at least numbers (array) or range ({ from, to })', }, } } const durationSeconds = typeof args.duration_seconds === 'number' && isFinite(args.duration_seconds) && args.duration_seconds > 0 ? args.duration_seconds : undefined const persistent = args.persistent === true onIndicateRef.current?.(numbers, range, durationSeconds, persistent) return { output: { success: true, message: `Indicating ${numbers.length} numbers${range ? ` and range ${range.from}–${range.to}` : ''}${persistent ? ' (persistent)' : durationSeconds ? ` for ${durationSeconds}s` : ''}`, }, } } // start_game if (name === 'start_game') { const gameId = String(args.game_id) const game = GAME_MAP.get(gameId) if (!game) { return { output: { success: false, error: `Unknown game: ${gameId}. Valid games: ${[...GAME_MAP.keys()].join(', ')}`, }, } } if (activeGameIdRef.current) { return { output: { success: false, error: `A game is already active (${activeGameIdRef.current}). End it first with end_game.`, }, } } const result = game.onStart?.(args as Record<string, unknown>) ?? { agentMessage: `${game.name} started!`, } activeGameIdRef.current = gameId gameStateRef.current = result.state ?? null sessionActivityRef.current.gamesPlayed.push(gameId) onGameStartRef.current?.(gameId, args) if (result.indicate) { onIndicateRef.current?.( result.indicate.numbers, undefined, undefined, result.indicate.persistent ) } return { output: { success: true, message: result.agentMessage }, enterMode: 'game', } } // end_game if (name === 'end_game') { const gameId = activeGameIdRef.current if (!gameId) { return { output: { success: true, message: 'No game is currently active.' } } } const game = GAME_MAP.get(gameId) activeGameIdRef.current = null gameStateRef.current = null onGameEndRef.current?.(gameId) return { output: { success: true, message: `${game?.name ?? gameId} game ended.` }, exitMode: true, } } // set_number_line_style if (name === 'set_number_line_style') { const scale = Math.max( 0.5, Math.min( 3, typeof args.label_scale === 'number' && isFinite(args.label_scale) ? args.label_scale : 1 ) ) const minOpacity = Math.max( 0, Math.min( 1, typeof args.label_min_opacity === 'number' && isFinite(args.label_min_opacity) ? args.label_min_opacity : 0 ) ) onSetLabelStyleRef.current?.(scale, minOpacity) return { output: { success: true, message: `Label style set: scale=${scale}, minOpacity=${minOpacity}`, }, } } // Game session tools (delegated to game handler) if (activeGameIdRef.current) { const game = GAME_MAP.get(activeGameIdRef.current) if (game?.onToolCall && game.sessionTools?.some((t) => t.name === name)) { try { const result = game.onToolCall(gameStateRef.current, name, args) gameStateRef.current = result.state if (result.indicate) { onIndicateRef.current?.( result.indicate.numbers, undefined, undefined, result.indicate.persistent ) } return { output: { success: true, message: result.agentMessage } } } catch (err) { return { output: { success: false, error: err instanceof Error ? err.message : 'Game tool call failed', }, } } } } // mark_moment — silently bookmark a memorable moment if (name === 'mark_moment') { console.log('[postcard] mark_moment called:', args) const caption = String(args.caption ?? '') const category = String(args.category ?? 'conversation') as MarkedMoment['category'] const significance = typeof args.significance === 'number' ? args.significance : 5 // Capture full scene snapshot (viewport + indicator + game target + exploration) const scene = getSceneSnapshotRef.current?.() ?? { viewport: { center: 0, pixelsPerUnit: 50 }, } // Capture recent transcript excerpt (last 4 lines) const recentTranscripts = transcriptsRef.current.slice(-4) const transcriptExcerpt = recentTranscripts .map((t) => `${t.role === 'child' ? 'Child' : 'Number'}: "${t.text}"`) .join('\n') const moment: MarkedMoment = { caption, category, significance, snapshot: { viewport: scene.viewport, highlights: scene.indicator?.numbers, indicatorRange: scene.indicator?.range, activeGameId: activeGameIdRef.current, activeExplorationId: scene.activeExplorationId, demoProgress: scene.demoProgress, gameTarget: scene.gameTarget, conferenceNumbers: conferenceNumbersRef.current.length > 1 ? [...conferenceNumbersRef.current] : undefined, timestamp: Date.now() - callStartTimeRef.current, }, transcriptExcerpt, timestampMs: Date.now() - callStartTimeRef.current, } markedMomentsRef.current.push(moment) // Persist moment server-side (fire-and-forget for relationship history) const playerId = activePlayerIdRef.current if (playerId) { fetch('/api/number-line/moments', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ playerId, callerNumber: calledNumberRef.current, sessionId: sessionIdRef.current, moment: { caption, category, significance, snapshot: moment.snapshot, transcriptExcerpt, }, }), }).catch((err) => console.warn('[moments] persist failed:', err)) } return { output: { success: true }, promptResponse: false } } // send_postcard — assemble manifest and POST to API if (name === 'send_postcard') { console.log( '[postcard] send_postcard called:', args, 'moments:', markedMomentsRef.current.length ) const sessionSummary = String(args.session_summary ?? '') const moments = markedMomentsRef.current if (moments.length === 0) { return { output: { success: false, error: 'No moments have been marked.' }, } } // Rank by significance, take top 4 const ranked: RankedMoment[] = [...moments] .sort((a, b) => b.significance - a.significance) .slice(0, 4) .map((m, i) => ({ rank: i + 1, caption: m.caption, category: m.category, snapshot: m.snapshot, transcriptExcerpt: m.transcriptExcerpt, })) const child = childProfileRef.current const manifest: PostcardManifest = { callerNumber: calledNumberRef.current, callerPersonality: getTraitSummary(calledNumberRef.current), childName: child?.name ?? 'Friend', childAge: child?.age, childEmoji: child?.emoji ?? '', moments: ranked, sessionSummary, } postcardSentRef.current = true // Fire and forget — POST to API (userId resolved server-side via session) const playerId = activePlayerIdRef.current fetch('/api/postcards', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ playerId, sessionId: sessionIdRef.current, manifest }), }).catch((err) => { console.warn('[postcard] POST failed:', err) }) return { output: { sent: true, message: 'Postcard is on its way!' }, enterMode: 'hanging_up', } } return null // unhandled }, [setPendingSpeaker, endVoiceSession] ) const onResponseDone = useCallback((_ctx: ModeContext, currentModeId: string): string | null => { if (currentModeId === 'answering' && childHasSpokenRef.current) { if (childProfileRef.current) { console.log('[postcard] transitioning answering → default (has profile)') return 'default' } console.log('[postcard] transitioning answering → familiarizing') return 'familiarizing' } if (currentModeId === 'familiarizing') { familiarizingResponseCountRef.current++ if (familiarizingResponseCountRef.current >= 4) { console.log('[postcard] transitioning familiarizing → default') return 'default' } } return null }, []) const onChildSpeech = useCallback( (transcript: string) => { childHasSpokenRef.current = true const buf = transcriptsRef.current buf.push({ role: 'child', text: transcript }) if (buf.length > 12) buf.shift() // Auto-pause exploration if (isExplorationActiveRef?.current && Date.now() - lastResumeTimestampRef.current > 3000) { narrationPlayingRef.current = false onPauseExplorationRef.current?.() } }, [isExplorationActiveRef] ) const onModelSpeech = useCallback((transcript: string) => { const buf = transcriptsRef.current buf.push({ role: 'number', text: transcript }) if (buf.length > 12) buf.shift() }, []) // Build the modes map from the number-line session modes // We need to wrap them as VoiceMode<ModeContext> const modes = useMemo(() => { const modeIds: ModeId[] = [ 'answering', 'familiarizing', 'default', 'conference', 'exploration', 'game', 'winding_down', 'farewell', 'hanging_up', ] const map: Record< string, { id: string getInstructions: (ctx: ModeContext) => string getTools: (ctx: ModeContext) => { type: 'function' name: string description: string parameters: { type: 'object'; properties: Record<string, unknown>; required?: string[] } }[] } > = {} for (const id of modeIds) { map[id] = { id, getInstructions: (ctx: ModeContext) => resolveMode(id, ctx).instructions, getTools: (ctx: ModeContext) => resolveMode(id, ctx).tools, } } return map }, []) const config = useMemo( (): VoiceSessionConfig<ModeContext> => ({ sessionEndpoint: '/api/realtime/session', buildContext: buildModeContext, initialModeId: 'answering', modes, onToolCall, onResponseDone, onChildSpeech, onModelSpeech, getSessionBody: () => ({ number: calledNumberRef.current, ...(activePlayerIdRef.current && { playerId: activePlayerIdRef.current }), ...(sessionHistoryRef.current.some((r) => r.number === calledNumberRef.current) && { previousScenario: sessionHistoryRef.current .filter((r) => r.number === calledNumberRef.current) .pop()?.scenario, }), ...(recommendedExplorationsRef.current?.length && { recommendedExplorations: recommendedExplorationsRef.current, }), ...(availablePlayersRef.current.length > 0 && { availablePlayers: availablePlayersRef.current, }), }), onSessionCreated: (data) => { scenarioRef.current = (data.scenario as GeneratedScenario) ?? null childProfileRef.current = (data.childProfile as ChildProfile) ?? undefined if (data.profileFailed) { setProfileFailed(true) profileFailedRef.current = true } }, onSessionEstablished: (dc) => { const history = sessionHistoryRef.current if (history.length > 0) { const historyText = formatCallHistory(history, calledNumberRef.current) sendSystemMessageHelper(dc, historyText) } // Set conference state const num = calledNumberRef.current conferenceNumbersRef.current = [num] setConferenceNumbers([num]) currentSpeakerRef.current = num setCurrentSpeaker(num) }, timer: { baseDurationMs: BASE_TIMEOUT_MS, extensionMs: EXTENSION_MS, warningBeforeEndMs: WARNING_BEFORE_END_MS, hangUpDelayMs: HANG_UP_DELAY_MS, }, onTimeWarning: (dc) => { dc.send( JSON.stringify({ type: 'conversation.item.create', item: { type: 'message', role: 'user', content: [ { type: 'input_text', text: '[System: Only 15 seconds left. If the conversation is going well, silently call request_more_time. Otherwise give a gentle in-character hint that you might have to go soon — but do NOT mention timers, countdowns, or the time system directly.]', }, ], }, }) ) dc.send(JSON.stringify({ type: 'response.create' })) }, onTimeExpired: (dc) => { if (!windingDownRequestedRef.current) { windingDownRequestedRef.current = true // Enter winding_down mode dc.send( JSON.stringify({ type: 'session.update', session: resolveMode('winding_down', buildModeContext()), }) ) dc.send(JSON.stringify({ type: 'response.create' })) } else if (!goodbyeRequestedRef.current) { goodbyeRequestedRef.current = true // Route through farewell if there are moments and no postcard sent const ctx = buildModeContext() const nextMode = ctx.momentCount > 0 && !ctx.postcardSent ? 'farewell' : 'hanging_up' dc.send( JSON.stringify({ type: 'session.update', session: resolveMode(nextMode, ctx), }) ) dc.send(JSON.stringify({ type: 'response.create' })) } // Phase 3 handled by the framework (force hangup) }, onResponseDoneRaw: (dc, msg, currentModeId) => { // Nudge the model to use mark_moment after a few exchanges in default mode if (currentModeId === 'default' && !momentNudgeSentRef.current) { defaultModeResponseCountRef.current++ if (defaultModeResponseCountRef.current >= 3 && markedMomentsRef.current.length === 0) { momentNudgeSentRef.current = true sendSystemMessageHelper( dc, '[System: REMINDER — You have not called mark_moment yet. You MUST call mark_moment to bookmark memorable moments during the conversation. Call it now for the most recent noteworthy exchange, and continue calling it throughout the call. The child will not hear or see this tool call.]' ) console.log( '[postcard] sent mark_moment nudge after %d responses with 0 moments', defaultModeResponseCountRef.current ) } } const pending = pendingExplorationRef.current if (!pending) return pendingExplorationRef.current = null if (pending.type === 'start') { // Wait for agent audio to finish (sustained silence) before starting exploration const SUSTAINED_SILENCE_MS = 300 const startedWaiting = Date.now() let silenceStartMs = voiceCallRef.current?.agentAudioPlayingRef.current ? 0 : Date.now() const waitForSilence = () => { if (Date.now() - startedWaiting > 3000) { onStartExplorationRef.current?.(pending.constantId) return } if (voiceCallRef.current?.agentAudioPlayingRef.current) { silenceStartMs = 0 requestAnimationFrame(waitForSilence) return } if (silenceStartMs === 0) silenceStartMs = Date.now() if (Date.now() - silenceStartMs < SUSTAINED_SILENCE_MS) { requestAnimationFrame(waitForSilence) return } onStartExplorationRef.current?.(pending.constantId) } requestAnimationFrame(waitForSilence) } else if (pending.type === 'resume') { // Truncate agent's buffered audio so narrator takes over immediately const response = (msg as Record<string, unknown>).response as | Record<string, unknown> | undefined const output = response?.output as Array<{ type: string; id?: string }> | undefined const audioItem = output?.find((item) => item.type === 'message') if (audioItem?.id) { const audioEndMs = Math.max(0, Date.now() - responseCreatedMsRef.current) dc.send( JSON.stringify({ type: 'conversation.item.truncate', item_id: audioItem.id, content_index: 0, audio_end_ms: audioEndMs, }) ) } narrationPlayingRef.current = true if (voiceCallRef.current?.audioElRef.current) { voiceCallRef.current.audioElRef.current.volume = 0 } lastResumeTimestampRef.current = Date.now() onResumeExplorationRef.current?.() } }, onResponseCreated: (dc) => { // Track response creation time for audio truncation responseCreatedMsRef.current = Date.now() // During narration, cancel any VAD-triggered response if (narrationPlayingRef.current) { if (!isExplorationActiveRef?.current) { // Exploration ended — allow agent to speak narrationPlayingRef.current = false if (voiceCallRef.current?.audioElRef.current) { voiceCallRef.current.audioElRef.current.volume = 1 } } else { dc.send(JSON.stringify({ type: 'response.cancel' })) } } }, onTransfer: (targetNumber, cleanupFn, _redialFn) => { setTransferTarget(targetNumber) setDomainState('transferring') onTransferRef.current?.(targetNumber) transferTimerRef.current = setTimeout(() => { transferTimerRef.current = null cleanupFn() setTransferTarget(null) setDomainState(null) // Re-dial the new number (preserves playerId via activePlayerIdRef) calledNumberRef.current = targetNumber // Reset for new call windingDownRequestedRef.current = false goodbyeRequestedRef.current = false childHasSpokenRef.current = false familiarizingResponseCountRef.current = 0 scenarioRef.current = null transcriptsRef.current = [] voiceCallRef.current?.dial() }, TRANSFER_DELAY_MS) }, suppressErrorCodes: [ 'response_cancel_not_active', 'conversation_already_has_active_response', 'item_truncation_failed', 'invalid_value', ], usageFeature: 'number-line:voice', }), [ buildModeContext, modes, onToolCall, onResponseDone, onChildSpeech, onModelSpeech, isExplorationActiveRef, ] ) const voiceCall = useVoiceCall(config) // Store voiceCall in a ref for use in callbacks that can't directly reference it voiceCallRef.current = voiceCall // Wire up the extendTimer ref extendTimerRef.current = voiceCall.extendTimer /** * Fetch shared history for this player-number pair and store it in the ref. * * If prior sessions have pending background culls (e.g. from dirty disconnects), * schedules a 15-second delayed re-fetch. If the re-fetch surfaces new moments, * injects them as a system message so the number "remembers" mid-conversation * without delaying the initial call connection. */ const fetchSharedHistory = useCallback( (playerId: string, callerNumber: number) => { const url = `/api/number-line/shared-history?playerId=${encodeURIComponent(playerId)}&callerNumber=${callerNumber}` fetch(url) .then((r) => r.json()) .then((data) => { if (!data.history) return sharedHistoryRef.current = data.history if (!data.history.pendingCulls) return // Delayed re-fetch: background culls may finish within ~15s setTimeout(() => { fetch(url) .then((r) => r.json()) .then((fresh) => { if (!fresh.history) return const prevCount = data.history.moments?.length ?? 0 if (fresh.history.moments.length <= prevCount) return sharedHistoryRef.current = fresh.history const lines = ( fresh.history.moments as Array<{ caption: string; recencyLabel: string }> ) .map( (m: { caption: string; recencyLabel: string }) => `- ${m.caption} (${m.recencyLabel})` ) .join('\n') voiceCall.sendSystemMessage( `[System update — you just remembered some things about this child from past calls:\n${lines}\nWeave these in naturally if relevant. Don't announce that you "just remembered" — act like you always knew.]` ) }) .catch(() => {}) }, 15_000) }) .catch((err) => console.warn('[moments] shared history fetch failed:', err)) }, [voiceCall] ) // ── Domain-specific dial that accepts number + options ── const dial = useCallback( (number: number, dialOptions?: DialOptions) => { // Set refs before calling the framework's dial calledNumberRef.current = number if (dialOptions?.playerId !== undefined) { activePlayerIdRef.current = dialOptions.playerId } availablePlayersRef.current = dialOptions?.availablePlayers ?? [] recommendedExplorationsRef.current = dialOptions?.recommendedExplorations // Reset domain state setProfileFailed(false) profileFailedRef.current = false extensionUsedRef.current = false windingDownRequestedRef.current = false goodbyeRequestedRef.current = false childHasSpokenRef.current = false familiarizingResponseCountRef.current = 0 momentNudgeSentRef.current = false defaultModeResponseCountRef.current = 0 scenarioRef.current = null transcriptsRef.current = [] markedMomentsRef.current = [] postcardSentRef.current = false sessionIdRef.current = createId() sessionEndedRef.current = false sharedHistoryRef.current = null callStartTimeRef.current = Date.now() setTransferTarget(null) setDomainState(null) // Load shared history — non-blocking, fills in ref before default mode starts. // If prior sessions have pending culls (dirty disconnects being processed), // schedules a delayed re-fetch and injects late-arriving memories mid-call. const playerId = dialOptions?.playerId ?? activePlayerIdRef.current if (playerId) { fetchSharedHistory(playerId, number) } voiceCall.dial() }, [voiceCall] ) const hangUp = useCallback(() => { // Save call record if (calledNumberRef.current && transcriptsRef.current.length > 0) { sessionHistoryRef.current.push({ number: calledNumberRef.current, conferenceNumbers: [...conferenceNumbersRef.current], transcripts: [...transcriptsRef.current], scenario: scenarioRef.current ? { ...scenarioRef.current } : null, timestamp: Date.now(), }) } // Clean up domain state conferenceNumbersRef.current = [] setConferenceNumbers([]) currentSpeakerRef.current = null setCurrentSpeaker(null) pendingSpeakerRef.current = null if (pendingSpeakerTimerRef.current) { clearTimeout(pendingSpeakerTimerRef.current) pendingSpeakerTimerRef.current = null } if (transferTimerRef.current) { clearTimeout(transferTimerRef.current) transferTimerRef.current = null } setTransferTarget(null) setDomainState(null) voiceCall.hangUp() }, [voiceCall]) const removeFromCall = useCallback( (numberToRemove: number) => { const updated = conferenceNumbersRef.current.filter((n) => n !== numberToRemove) if (updated.length === 0) { hangUp() return } conferenceNumbersRef.current = updated setConferenceNumbers(updated) if (currentSpeakerRef.current === numberToRemove) { currentSpeakerRef.current = updated[0] setCurrentSpeaker(updated[0]) } if (updated.length === 1) { voiceCall.enterMode('default', 'removeFromCall → solo') } else { voiceCall.updateSession('removeFromCall → conference') } voiceCall.sendSystemMessage(`[System: ${numberToRemove} has left the call.]`, true) }, [hangUp, voiceCall] ) const setNarrationPlaying = useCallback( (playing: boolean) => { narrationPlayingRef.current = playing if (voiceCall.audioElRef.current) { voiceCall.audioElRef.current.volume = playing ? 0 : 1 } }, [voiceCall.audioElRef] ) // Compute effective call state (overlay 'transferring' on base) const effectiveState: CallState = domainState === 'transferring' ? 'transferring' : voiceCall.state return { state: effectiveState, error: voiceCall.error, errorCode: voiceCall.errorCode, dial, hangUp, timeRemaining: voiceCall.timeRemaining, isSpeaking: voiceCall.isSpeaking, transferTarget, conferenceNumbers, currentSpeaker, removeFromCall, sendSystemMessage: voiceCall.sendSystemMessage, setNarrationPlaying, profileFailed, currentInstructions: voiceCall.currentInstructions, modeDebug: voiceCall.modeDebug as ModeDebugInfo, } } |