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* Type Racer Jr. - Server-side Validator
*
* Validates all game moves and state transitions.
* Runs on both client (optimistic) and server (authoritative).
*/
import type { GameValidator, PracticeBreakOptions, ValidationResult } from '@/lib/arcade/game-sdk'
import type { GameResultsReport, PlayerResult } from '@/lib/arcade/game-sdk/types'
import {
finalizeSongContext,
pluralize,
songDetail,
songList,
songMoment,
} from '@/lib/arcade/song-context'
import {
type DifficultyLevel,
type TypeRacerJrConfig,
type TypeRacerJrMove,
type TypeRacerJrState,
TypeRacerJrStateSchema,
} from './types'
import { pickWords, type DifficultyLevel as WordDifficultyLevel } from './words'
const PRACTICE_BREAK_DEFAULTS: TypeRacerJrConfig = {
gameMode: 'free-play',
timeLimit: null,
startingDifficulty: 'level1',
wordCount: 5,
keyboardLayout: 'qwerty',
showVirtualKeyboard: false,
}
function difficultyToWordLevel(d: DifficultyLevel): WordDifficultyLevel {
return d
}
export class TypeRacerJrValidator implements GameValidator<TypeRacerJrState, TypeRacerJrMove> {
stateSchema = TypeRacerJrStateSchema as unknown as import('zod').ZodType<TypeRacerJrState>
validateMove(
state: TypeRacerJrState,
move: TypeRacerJrMove,
_context?: { userId?: string; playerOwnership?: Record<string, string> }
): ValidationResult {
switch (move.type) {
case 'START_GAME':
return this.validateStartGame(state, move.data)
case 'COMPLETE_WORD':
return this.validateCompleteWord(state, move.data)
case 'ADVANCE_DIFFICULTY':
return this.validateAdvanceDifficulty(state, move.data)
case 'END_GAME':
return this.validateEndGame(state, move.data)
case 'SET_CONFIG':
return this.validateSetConfig(state, move.data.field, move.data.value)
case 'RESET_GAME':
return this.validateResetGame(state)
default:
return {
valid: false,
error: `Unknown move type: ${(move as TypeRacerJrMove).type}`,
}
}
}
private validateStartGame(
state: TypeRacerJrState,
data: {
wordQueue: typeof state.wordQueue
playerMetadata: typeof state.playerMetadata
}
): ValidationResult {
if (state.gamePhase !== 'setup') {
return { valid: false, error: 'Can only start from setup phase' }
}
if (!Array.isArray(data.wordQueue) || data.wordQueue.length === 0) {
return { valid: false, error: 'Word queue is required' }
}
return {
valid: true,
newState: {
...state,
gamePhase: 'playing',
wordQueue: data.wordQueue,
currentWordIndex: 0,
completedWords: [],
totalStars: 0,
bestStreak: 0,
consecutiveCleanWords: 0,
usedWords: data.wordQueue.map((w) => w.word),
gameStartTime: Date.now(),
currentWordStartTime: Date.now(),
playerMetadata: data.playerMetadata,
endReason: null,
},
}
}
private validateCompleteWord(
state: TypeRacerJrState,
data: {
word: string
stars: number
mistakeCount: number
durationMs: number
}
): ValidationResult {
if (state.gamePhase !== 'playing') {
return {
valid: false,
error: 'Can only complete words during playing phase',
}
}
const currentWord = state.wordQueue[state.currentWordIndex]
if (!currentWord || currentWord.word !== data.word) {
return { valid: false, error: 'Word does not match current word' }
}
const completedWord = {
word: data.word,
emoji: currentWord.emoji,
stars: data.stars,
mistakeCount: data.mistakeCount,
durationMs: data.durationMs,
}
const newConsecutiveClean = data.mistakeCount === 0 ? state.consecutiveCleanWords + 1 : 0
const newBestStreak = Math.max(state.bestStreak, newConsecutiveClean)
const nextWordIndex = state.currentWordIndex + 1
// Check if all words done (free-play mode)
const allWordsDone = nextWordIndex >= state.wordQueue.length
const newState: TypeRacerJrState = {
...state,
completedWords: [...state.completedWords, completedWord],
currentWordIndex: nextWordIndex,
totalStars: state.totalStars + data.stars,
consecutiveCleanWords: newConsecutiveClean,
bestStreak: newBestStreak,
currentWordStartTime: allWordsDone ? null : Date.now(),
}
// Auto-end if all words completed
if (allWordsDone) {
return {
valid: true,
newState: {
...newState,
gamePhase: 'results',
endReason: 'all-words-done',
},
}
}
return { valid: true, newState }
}
private validateAdvanceDifficulty(
state: TypeRacerJrState,
data: { newDifficulty: DifficultyLevel; newWords: typeof state.wordQueue }
): ValidationResult {
if (state.gamePhase !== 'playing') {
return {
valid: false,
error: 'Can only advance difficulty during playing phase',
}
}
// Append new words to queue
const newQueue = [...state.wordQueue, ...data.newWords]
return {
valid: true,
newState: {
...state,
currentDifficulty: data.newDifficulty,
wordQueue: newQueue,
usedWords: [...state.usedWords, ...data.newWords.map((w) => w.word)],
consecutiveCleanWords: 0,
},
}
}
private validateEndGame(
state: TypeRacerJrState,
data: { reason: 'timer-expired' | 'all-words-done' | 'player-quit' }
): ValidationResult {
if (state.gamePhase !== 'playing') {
return { valid: false, error: 'Can only end game during playing phase' }
}
return {
valid: true,
newState: {
...state,
gamePhase: 'results',
endReason: data.reason,
},
}
}
private validateSetConfig(
state: TypeRacerJrState,
field: string,
value: unknown
): ValidationResult {
if (state.gamePhase !== 'setup') {
return { valid: false, error: 'Can only change config in setup phase' }
}
switch (field) {
case 'gameMode':
if (!['free-play', 'beat-the-clock'].includes(value as string)) {
return { valid: false, error: 'Invalid game mode' }
}
return {
valid: true,
newState: {
...state,
gameMode: value as TypeRacerJrState['gameMode'],
// Set default time limit for beat-the-clock
timeLimit: value === 'beat-the-clock' ? (state.timeLimit ?? 60) : null,
// Set default word count for free-play
wordCount: value === 'free-play' ? (state.wordCount ?? 5) : null,
},
}
case 'timeLimit':
if (value !== null && ![60, 90, 120].includes(value as number)) {
return { valid: false, error: 'Invalid time limit' }
}
return {
valid: true,
newState: {
...state,
timeLimit: value as TypeRacerJrState['timeLimit'],
},
}
case 'startingDifficulty':
if (!['level1', 'level2', 'level3'].includes(value as string)) {
return { valid: false, error: 'Invalid difficulty level' }
}
return {
valid: true,
newState: {
...state,
currentDifficulty: value as DifficultyLevel,
},
}
case 'wordCount':
if (value !== null && (typeof value !== 'number' || value < 1 || value > 20)) {
return { valid: false, error: 'Invalid word count' }
}
return {
valid: true,
newState: { ...state, wordCount: value as number | null },
}
default:
return { valid: false, error: `Unknown config field: ${field}` }
}
}
private validateResetGame(state: TypeRacerJrState): ValidationResult {
return {
valid: true,
newState: {
...state,
gamePhase: 'setup',
wordQueue: [],
currentWordIndex: 0,
completedWords: [],
totalStars: 0,
bestStreak: 0,
consecutiveCleanWords: 0,
usedWords: [],
gameStartTime: null,
currentWordStartTime: null,
endReason: null,
},
}
}
isGameComplete(state: TypeRacerJrState): boolean {
return state.gamePhase === 'results'
}
getInitialState(config: TypeRacerJrConfig): TypeRacerJrState {
return {
gamePhase: 'setup',
gameMode: config.gameMode,
timeLimit: config.timeLimit,
wordCount: config.wordCount,
keyboardLayout: config.keyboardLayout,
showVirtualKeyboard: config.showVirtualKeyboard,
currentDifficulty: config.startingDifficulty,
consecutiveCleanWords: 0,
wordQueue: [],
currentWordIndex: 0,
completedWords: [],
usedWords: [],
totalStars: 0,
bestStreak: 0,
gameStartTime: null,
currentWordStartTime: null,
playerId: '',
playerMetadata: {},
endReason: null,
}
}
getInitialStateForPracticeBreak(
config: Partial<TypeRacerJrConfig>,
options: PracticeBreakOptions
): TypeRacerJrState {
const fullConfig: TypeRacerJrConfig = {
...PRACTICE_BREAK_DEFAULTS,
...config,
}
const wordCount = fullConfig.wordCount ?? 5
const words = pickWords(difficultyToWordLevel(fullConfig.startingDifficulty), wordCount)
const playerId = options.playerId
const playerMetadata = {
[playerId]: {
id: playerId,
name: options.playerName || 'Player',
emoji: '⌨️',
userId: playerId,
},
}
return {
gamePhase: 'playing',
gameMode: fullConfig.gameMode,
timeLimit: fullConfig.timeLimit,
wordCount: wordCount,
keyboardLayout: fullConfig.keyboardLayout,
showVirtualKeyboard: fullConfig.showVirtualKeyboard,
currentDifficulty: fullConfig.startingDifficulty,
consecutiveCleanWords: 0,
wordQueue: words,
currentWordIndex: 0,
completedWords: [],
usedWords: words.map((w) => w.word),
totalStars: 0,
bestStreak: 0,
gameStartTime: Date.now(),
currentWordStartTime: Date.now(),
playerId,
playerMetadata,
endReason: null,
}
}
}
function formatDuration(ms: number): string {
const totalSeconds = Math.floor(ms / 1000)
const minutes = Math.floor(totalSeconds / 60)
const seconds = totalSeconds % 60
if (minutes > 0) {
return `${minutes}:${seconds.toString().padStart(2, '0')}`
}
return `${seconds}s`
}
function formatCompletedWord(word: TypeRacerJrState['completedWords'][number]) {
return `${word.emoji} ${word.word}`.trim()
}
function buildTypeRacerSongContext(
state: TypeRacerJrState,
wordsTyped: number,
totalMistakes: number,
accuracy: number,
headline: string
): NonNullable<GameResultsReport['songContext']> {
const completedWords = state.completedWords
const firstWord = completedWords[0]
const finalWord = completedWords[completedWords.length - 1]
const cleanWords = completedWords.filter((word) => word.mistakeCount === 0)
const trickiestWord = [...completedWords].sort(
(a, b) => b.mistakeCount - a.mistakeCount || b.durationMs - a.durationMs
)[0]
const firstMistakeIndex = completedWords.findIndex((word) => word.mistakeCount > 0)
const cleanAfterMistake =
firstMistakeIndex >= 0
? completedWords.slice(firstMistakeIndex + 1).find((word) => word.mistakeCount === 0)
: undefined
const remainingWords = Math.max(0, state.wordQueue.length - wordsTyped)
const nextWord = state.wordQueue[wordsTyped]?.word
const cleanRun = wordsTyped > 0 && totalMistakes === 0
return finalizeSongContext({
summary: `${wordsTyped} ${pluralize(wordsTyped, 'word')} typed, ${state.totalStars} stars, ${accuracy}% typing accuracy`,
details: [
firstWord ? songDetail('Opening word', firstWord.word) : undefined,
finalWord
? songDetail(
'Final word',
`${finalWord.word} (${finalWord.mistakeCount} ${pluralize(finalWord.mistakeCount, 'mistake')}, ${finalWord.stars} ${pluralize(finalWord.stars, 'star')})`
)
: undefined,
songList(
'Words typed',
completedWords.map((word) => word.word),
8
),
songList('Clean words', cleanWords.map(formatCompletedWord), 5),
trickiestWord && trickiestWord.mistakeCount > 0
? songDetail(
'Tough word',
`${trickiestWord.word} with ${trickiestWord.mistakeCount} ${pluralize(
trickiestWord.mistakeCount,
'mistake'
)}`
)
: undefined,
],
dramaticMoments: [
firstWord ? songMoment('Opening beat', `first word was "${firstWord.word}"`) : undefined,
cleanRun
? songMoment(
'Clean run',
`no mistakes across ${wordsTyped} ${pluralize(wordsTyped, 'word')}`
)
: undefined,
state.bestStreak > 1
? songMoment('Strategy', `built a ${state.bestStreak}-word clean streak`)
: undefined,
trickiestWord && trickiestWord.mistakeCount > 0
? songMoment(
'Tough item',
`"${trickiestWord.word}" took ${trickiestWord.mistakeCount} ${pluralize(
trickiestWord.mistakeCount,
'mistake'
)}`
)
: undefined,
cleanAfterMistake
? songMoment('Comeback', `after a mistake, "${cleanAfterMistake.word}" landed clean`)
: undefined,
remainingWords === 1
? songMoment('Near miss', `one word left${nextWord ? `: "${nextWord}"` : ''}`)
: undefined,
finalWord
? songMoment(
'Clutch moment',
`final word was "${finalWord.word}" with ${finalWord.mistakeCount} ${pluralize(
finalWord.mistakeCount,
'mistake'
)}`
)
: undefined,
],
strategyNotes: [
songDetail('Typing level', state.currentDifficulty),
songDetail('Keyboard layout', state.keyboardLayout),
cleanRun
? 'Typed carefully enough to keep every completed word clean'
: totalMistakes > 0
? `Recovered from ${totalMistakes} total ${pluralize(totalMistakes, 'mistake')}`
: undefined,
],
outcome:
remainingWords === 0 && wordsTyped > 0
? `finished ${wordsTyped} typed ${pluralize(wordsTyped, 'word')}`
: headline,
})
}
// Create validator instance
const validator = new TypeRacerJrValidator()
// Attach getResultsReport as a non-interface method (same pattern as memory-quiz)
;(validator as any).getResultsReport = (
state: TypeRacerJrState,
_config: TypeRacerJrConfig
): GameResultsReport => {
const startedAt = state.gameStartTime ?? Date.now()
const endedAt = Date.now()
const durationMs = endedAt - startedAt
const wordsTyped = state.completedWords.length
const totalMistakes = state.completedWords.reduce((sum, w) => sum + w.mistakeCount, 0)
const totalLetters = state.completedWords.reduce((sum, w) => sum + w.word.length, 0)
const accuracy =
totalLetters > 0 ? Math.round(((totalLetters - totalMistakes) / totalLetters) * 100) : 0
const playerResults: PlayerResult[] = [
{
playerId: state.playerId || 'player',
playerName: Object.values(state.playerMetadata)[0]?.name ?? 'Player',
playerEmoji: '⌨️',
userId: state.playerId || 'player',
score: state.totalStars,
rank: 1,
isWinner: true,
correctCount: wordsTyped,
incorrectCount: totalMistakes,
totalAttempts: wordsTyped,
accuracy,
bestStreak: state.bestStreak,
},
]
let headline: string
let resultTheme: GameResultsReport['resultTheme']
let celebrationType: GameResultsReport['celebrationType']
if (accuracy >= 95 && wordsTyped >= 5) {
headline = 'Perfect Typing!'
resultTheme = 'success'
celebrationType = 'confetti'
} else if (accuracy >= 80) {
headline = 'Great Typing!'
resultTheme = 'good'
celebrationType = 'stars'
} else if (wordsTyped >= 3) {
headline = 'Nice Try!'
resultTheme = 'neutral'
celebrationType = 'none'
} else {
headline = 'Keep Practicing!'
resultTheme = 'needs-practice'
celebrationType = 'none'
}
const customStats: GameResultsReport['customStats'] = [
{
label: 'Words',
value: wordsTyped,
icon: '📝',
highlight: wordsTyped >= 5,
},
{
label: 'Stars',
value: `${state.totalStars}`,
icon: '⭐',
highlight: state.totalStars >= wordsTyped * 2,
},
{
label: 'Accuracy',
value: `${accuracy}%`,
icon: '🎯',
highlight: accuracy >= 90,
},
{ label: 'Time', value: formatDuration(durationMs), icon: '⏱️' },
]
if (state.bestStreak > 1) {
customStats.push({
label: 'Best Streak',
value: state.bestStreak,
icon: '🔥',
highlight: true,
})
}
return {
gameName: 'type-racer-jr',
gameDisplayName: 'Type Racer Jr.',
gameIcon: '⌨️',
durationMs,
completedNormally: state.endReason === 'all-words-done' || state.endReason === 'timer-expired',
startedAt,
endedAt,
gameMode: 'single-player',
playerCount: 1,
playerResults,
winnerId: null,
itemsCompleted: wordsTyped,
itemsTotal: state.wordQueue.length,
completionPercent:
state.wordQueue.length > 0 ? Math.round((wordsTyped / state.wordQueue.length) * 100) : 0,
leaderboardEntry: {
normalizedScore: accuracy,
category: 'speed',
difficulty: state.currentDifficulty,
},
customStats,
headline,
subheadline: `${wordsTyped} words in ${formatDuration(durationMs)}`,
resultTheme,
celebrationType,
songContext: buildTypeRacerSongContext(state, wordsTyped, totalMistakes, accuracy, headline),
}
}
export const typeRacerJrValidator = validator
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