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* Matching Pairs Framework - Validator Factory
*
* Creates a generic GameValidator from a MatchingPairsVariant.
* Ported from arcade-games/matching/Validator.ts with variant hooks.
*/
import type { GameResultsReport, PlayerResult } from '../game-sdk/types'
import { finalizeSongContext, pluralize, songDetail, songList, songMoment } from '../song-context'
import type { GameValidator, PracticeBreakOptions, ValidationResult } from '../validation/types'
import type {
BaseMatchingCard,
BaseMatchingConfig,
MatchingPairsMove,
MatchingPairsState,
MatchingPairsVariant,
Player,
} from './types'
/**
* Format duration in milliseconds to a human-readable string
*/
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 `${seconds}s`
}
function getGameDisplay(gameName: string): { name: string; icon: string } {
switch (gameName) {
case 'music-matching':
return { name: 'Music Note Match', icon: '🎵' }
default:
return { name: 'Matching Pairs Battle', icon: '⚔️' }
}
}
function describeCardForSong(card: BaseMatchingCard): string | null {
const data = card as unknown as Record<string, unknown>
if (typeof data.friendlyName === 'string' && data.friendlyName.trim()) {
return data.friendlyName
}
if (typeof data.displayName === 'string' && data.displayName.trim()) {
const clef = typeof data.clef === 'string' ? ` (${data.clef})` : ''
return `${data.displayName}${clef}`
}
if (typeof data.pitchClass === 'string') {
const octave = typeof data.octave === 'number' ? data.octave : ''
return `${data.pitchClass}${octave}`
}
if (typeof data.number === 'number') {
if (typeof data.complement === 'number' && typeof data.targetSum === 'number') {
return `${data.number} + ${data.complement} = ${data.targetSum}`
}
return String(data.number)
}
return null
}
function uniqueSongDetails(values: Array<string | null | undefined>, limit: number): string[] {
const seen = new Set<string>()
const result: string[] = []
for (const value of values) {
const trimmed = value?.trim()
if (!trimmed || seen.has(trimmed)) continue
seen.add(trimmed)
result.push(trimmed)
if (result.length >= limit) break
}
return result
}
function describeCardIdsForSong<TCard extends BaseMatchingCard>(
state: MatchingPairsState<TCard>,
cardIds: [string, string] | null
): string | undefined {
if (!cardIds) return undefined
const labels = uniqueSongDetails(
cardIds.map((id) => {
const card = state.gameCards.find((candidate) => candidate.id === id)
return card ? describeCardForSong(card) : null
}),
2
)
return labels.length > 0 ? labels.join(' + ') : undefined
}
function buildMatchingPairsSongContext<
TCard extends BaseMatchingCard,
TConfig extends BaseMatchingConfig,
>(
state: MatchingPairsState<TCard, TConfig> & TConfig,
options: {
gameName: string
headline: string
gameModeLabel: string
difficultyLabel: string
matchedDetails: string[]
unmatchedDetails: string[]
bestStreak: number
isSinglePlayer: boolean
}
): NonNullable<GameResultsReport['songContext']> {
const {
gameName,
headline,
gameModeLabel,
difficultyLabel,
matchedDetails,
unmatchedDetails,
bestStreak,
isSinglePlayer,
} = options
const remainingPairs = Math.max(0, state.totalPairs - state.matchedPairs)
const mismatchChecks = Math.max(0, state.moves - state.matchedPairs)
const finalMatch = describeCardIdsForSong(state, state.lastMatchedPair)
const openingMatch = matchedDetails[0]
const cleanRun = state.matchedPairs === state.totalPairs && mismatchChecks === 0
return finalizeSongContext({
summary: `${state.matchedPairs}/${state.totalPairs} pairs found in ${state.moves} ${pluralize(
state.moves,
'move'
)}`,
details: [
songDetail('Mode', gameModeLabel),
songDetail('Difficulty', difficultyLabel),
finalMatch ? songDetail('Final match', finalMatch) : undefined,
songList('Matched pairs', matchedDetails, 8),
songList('Still hidden', unmatchedDetails, 5),
],
dramaticMoments: [
openingMatch
? songMoment('Opening beat', `first visible matched pair was ${openingMatch}`)
: undefined,
finalMatch ? songMoment('Clutch moment', `final match was ${finalMatch}`) : undefined,
cleanRun ? songMoment('Perfect run', 'cleared the board with no mismatch checks') : undefined,
remainingPairs === 1 && unmatchedDetails[0]
? songMoment('Near miss', `one pair left hidden: ${unmatchedDetails[0]}`)
: undefined,
mismatchChecks > 0 && state.matchedPairs > 0
? songMoment(
'Comeback',
`found ${state.matchedPairs} ${pluralize(
state.matchedPairs,
'pair'
)} after ${mismatchChecks} mismatch ${pluralize(mismatchChecks, 'check')}`
)
: undefined,
bestStreak >= 3 ? songMoment('Strategy', `built a ${bestStreak}-match streak`) : undefined,
unmatchedDetails[0] && remainingPairs > 0
? songMoment('Tough item', `${unmatchedDetails[0]} stayed hidden`)
: undefined,
],
strategyNotes: [
gameName === 'music-matching'
? 'Matched musical notes by name and staff position'
: 'Matched abacus, numeral, or complement cards by value',
isSinglePlayer ? 'Solo scan of the board' : 'Competitive turn-taking match',
],
outcome:
state.matchedPairs === state.totalPairs ? `cleared all ${state.totalPairs} pairs` : headline,
})
}
/**
* Default canFlipCard check — used when variant doesn't override
*/
function defaultCanFlipCard<TCard extends BaseMatchingCard>(
card: TCard,
flippedCards: TCard[],
isProcessingMove: boolean
): boolean {
if (isProcessingMove) return false
if (card.matched) return false
if (flippedCards.some((c) => c.id === card.id)) return false
if (flippedCards.length >= 2) return false
return true
}
/**
* Default results report generator — provides standard matching-pairs report.
* Variants override only if they need custom stats/achievements.
*/
function defaultGetResultsReport<
TCard extends BaseMatchingCard,
TConfig extends BaseMatchingConfig,
>(
state: MatchingPairsState<TCard, TConfig> & TConfig,
config: TConfig,
gameName: string
): GameResultsReport {
const startedAt = state.gameStartTime ?? Date.now()
const endedAt = state.gameEndTime ?? Date.now()
const durationMs = endedAt - startedAt
const playerResults: PlayerResult[] = state.activePlayers
.map((playerId) => {
const meta = state.playerMetadata[playerId]
const playerScore = state.scores[playerId] ?? 0
const isSinglePlayer = state.activePlayers.length === 1
const movesForAccuracy = isSinglePlayer ? state.moves : playerScore * 2
const accuracy = movesForAccuracy > 0 ? Math.round((playerScore / movesForAccuracy) * 100) : 0
return {
playerId,
playerName: meta?.name ?? 'Player',
playerEmoji: meta?.emoji ?? '👤',
userId: meta?.userId ?? playerId,
score: playerScore,
rank: 0,
isWinner: false,
correctCount: playerScore,
totalAttempts: isSinglePlayer ? state.moves : undefined,
accuracy: isSinglePlayer ? accuracy : undefined,
bestStreak: state.consecutiveMatches[playerId] ?? 0,
}
})
.sort((a, b) => b.score - a.score)
.map((p, idx) => ({ ...p, rank: idx + 1, isWinner: idx === 0 }))
const winner = playerResults[0]
const isSinglePlayer = playerResults.length === 1
const overallAccuracy =
isSinglePlayer && state.moves > 0
? Math.round((state.matchedPairs / state.moves) * 100)
: (winner?.accuracy ?? 0)
let headline = 'Game Complete!'
let resultTheme: GameResultsReport['resultTheme'] = 'neutral'
let celebrationType: GameResultsReport['celebrationType'] = 'none'
if (isSinglePlayer) {
if (overallAccuracy >= 100) {
headline = 'Perfect Memory!'
resultTheme = 'success'
celebrationType = 'confetti'
} else if (overallAccuracy >= 80) {
headline = 'Great Job!'
resultTheme = 'good'
celebrationType = 'stars'
} else if (overallAccuracy >= 50) {
headline = 'Nice Work!'
resultTheme = 'neutral'
} else {
headline = 'Keep Practicing!'
resultTheme = 'needs-practice'
}
} else {
headline = `${winner?.playerName ?? 'Player'} Wins!`
resultTheme = 'success'
celebrationType = 'confetti'
}
const customStats: GameResultsReport['customStats'] = [
{
label: 'Pairs Found',
value: `${state.matchedPairs}/${state.totalPairs}`,
icon: '🎯',
highlight: state.matchedPairs === state.totalPairs,
},
{ label: 'Total Moves', value: state.moves, icon: '👆' },
{ label: 'Time', value: formatDuration(durationMs), icon: '⏱️' },
]
if (isSinglePlayer) {
customStats.push({
label: 'Accuracy',
value: `${overallAccuracy}%`,
icon: '📊',
highlight: overallAccuracy >= 80,
})
}
const bestStreak = Math.max(...Object.values(state.consecutiveMatches), 0)
if (bestStreak >= 3) {
customStats.push({
label: 'Best Streak',
value: bestStreak,
icon: '🔥',
highlight: true,
})
}
const display = getGameDisplay(gameName)
const matchedDetails = uniqueSongDetails(
state.gameCards.filter((card) => card.matched).map(describeCardForSong),
8
)
const unmatchedDetails = uniqueSongDetails(
state.gameCards.filter((card) => !card.matched).map(describeCardForSong),
5
)
const gameModeLabel = isSinglePlayer ? 'single-player' : 'competitive'
let difficultyLabel: string
if (config.difficulty <= 6) {
difficultyLabel = 'easy'
} else if (config.difficulty <= 8) {
difficultyLabel = 'medium'
} else if (config.difficulty <= 12) {
difficultyLabel = 'hard'
} else {
difficultyLabel = 'expert'
}
return {
gameName,
gameDisplayName: display.name,
gameIcon: display.icon,
durationMs,
completedNormally: state.matchedPairs === state.totalPairs,
startedAt,
endedAt,
gameMode: isSinglePlayer ? 'single-player' : 'competitive',
playerCount: playerResults.length,
playerResults,
winnerId: isSinglePlayer ? null : (winner?.playerId ?? null),
itemsCompleted: state.matchedPairs,
itemsTotal: state.totalPairs,
completionPercent: Math.round((state.matchedPairs / state.totalPairs) * 100),
leaderboardEntry: {
normalizedScore: isSinglePlayer ? overallAccuracy : (winner?.score ?? 0) * 10,
category: 'memory',
difficulty: difficultyLabel,
},
customStats,
headline,
subheadline: isSinglePlayer
? `${state.matchedPairs} pairs in ${formatDuration(durationMs)}`
: `Final Score: ${winner?.score ?? 0} pairs`,
resultTheme,
celebrationType,
songContext: buildMatchingPairsSongContext(state, {
gameName,
headline,
gameModeLabel,
difficultyLabel,
matchedDetails,
unmatchedDetails,
bestStreak,
isSinglePlayer,
}),
}
}
/**
* Create a GameValidator for a matching-pairs variant.
*/
export function createMatchingPairsValidator<
TCard extends BaseMatchingCard,
TConfig extends BaseMatchingConfig,
>(
variant: MatchingPairsVariant<TCard, TConfig>
): GameValidator<MatchingPairsState<TCard, TConfig> & TConfig, MatchingPairsMove<TCard>> {
type State = MatchingPairsState<TCard, TConfig> & TConfig
type Move = MatchingPairsMove<TCard>
const canFlip = variant.canFlipCard ?? defaultCanFlipCard
function validateFlipCard(
state: State,
cardId: string,
playerId: string,
context?: { userId?: string; playerOwnership?: Record<string, string> }
): ValidationResult {
if (state.gamePhase !== 'playing') {
return {
valid: false,
error: 'Cannot flip cards outside of playing phase',
}
}
if (state.activePlayers.length > 1 && state.currentPlayer !== playerId) {
return { valid: false, error: 'Not your turn' }
}
if (context?.userId && context?.playerOwnership) {
const playerOwner = context.playerOwnership[playerId]
if (playerOwner && playerOwner !== context.userId) {
return { valid: false, error: 'You can only move your own players' }
}
}
const card = state.gameCards.find((c) => c.id === cardId)
if (!card) {
return { valid: false, error: 'Card not found' }
}
if (!canFlip(card, state.flippedCards, state.isProcessingMove)) {
return { valid: false, error: 'Cannot flip this card' }
}
const newFlippedCards = [...state.flippedCards, card]
let newState: State = {
...state,
flippedCards: newFlippedCards,
isProcessingMove: newFlippedCards.length === 2,
showMismatchFeedback: false,
}
if (newFlippedCards.length === 2) {
const [card1, card2] = newFlippedCards
const matchResult = variant.validateMatch(card1, card2)
if (matchResult.isValid) {
newState = {
...newState,
gameCards: newState.gameCards.map((c) =>
c.id === card1.id || c.id === card2.id
? { ...c, matched: true, matchedBy: state.currentPlayer }
: c
) as TCard[],
matchedPairs: state.matchedPairs + 1,
scores: {
...state.scores,
[state.currentPlayer]: (state.scores[state.currentPlayer] || 0) + 1,
},
consecutiveMatches: {
...state.consecutiveMatches,
[state.currentPlayer]: (state.consecutiveMatches[state.currentPlayer] || 0) + 1,
},
moves: state.moves + 1,
flippedCards: [],
isProcessingMove: false,
lastMatchedPair: [card1.id, card2.id],
}
if (newState.matchedPairs === newState.totalPairs) {
newState = {
...newState,
gamePhase: 'results',
gameEndTime: Date.now(),
}
}
} else {
const shouldSwitchPlayer = state.activePlayers.length > 1
const nextPlayerIndex = shouldSwitchPlayer
? (state.activePlayers.indexOf(state.currentPlayer) + 1) % state.activePlayers.length
: 0
const nextPlayer = shouldSwitchPlayer
? state.activePlayers[nextPlayerIndex]
: state.currentPlayer
newState = {
...newState,
currentPlayer: nextPlayer,
consecutiveMatches: {
...state.consecutiveMatches,
[state.currentPlayer]: 0,
},
moves: state.moves + 1,
flippedCards: newFlippedCards,
isProcessingMove: true,
showMismatchFeedback: true,
playerHovers: {
...state.playerHovers,
[state.currentPlayer]: null,
},
}
}
}
return { valid: true, newState }
}
function validateStartGame(
state: State,
activePlayers: Player[],
cards?: TCard[],
playerMetadata?: { [playerId: string]: any }
): ValidationResult {
if (!activePlayers || activePlayers.length === 0) {
return { valid: false, error: 'Must have at least one player' }
}
const configFromState = extractConfig(state)
const gameCards = cards || variant.generateCards(configFromState)
const newState: State = {
...state,
gameCards,
cards: gameCards,
activePlayers,
playerMetadata: playerMetadata || {},
gamePhase: 'playing',
gameStartTime: Date.now(),
currentPlayer: activePlayers[0],
flippedCards: [],
matchedPairs: 0,
moves: 0,
scores: activePlayers.reduce((acc, p) => ({ ...acc, [p]: 0 }), {}),
consecutiveMatches: activePlayers.reduce((acc, p) => ({ ...acc, [p]: 0 }), {}),
originalConfig: variant.getOriginalConfig(configFromState),
pausedGamePhase: undefined,
pausedGameState: undefined,
playerHovers: {},
}
return { valid: true, newState }
}
function validateClearMismatch(state: State): ValidationResult {
if (!state.showMismatchFeedback || state.flippedCards.length === 0) {
return { valid: true, newState: state }
}
const clearedHovers = { ...state.playerHovers }
for (const playerId of state.activePlayers) {
if (playerId !== state.currentPlayer) {
clearedHovers[playerId] = null
}
}
return {
valid: true,
newState: {
...state,
flippedCards: [],
showMismatchFeedback: false,
isProcessingMove: false,
playerHovers: clearedHovers,
},
}
}
function validateGoToSetup(state: State): ValidationResult {
const isPausingGame = state.gamePhase === 'playing' || state.gamePhase === 'results'
return {
valid: true,
newState: {
...state,
gamePhase: 'setup',
pausedGamePhase: isPausingGame ? state.gamePhase : undefined,
pausedGameState: isPausingGame
? {
gameCards: state.gameCards,
currentPlayer: state.currentPlayer,
matchedPairs: state.matchedPairs,
moves: state.moves,
scores: state.scores,
activePlayers: state.activePlayers,
playerMetadata: state.playerMetadata,
consecutiveMatches: state.consecutiveMatches,
gameStartTime: state.gameStartTime,
}
: undefined,
gameCards: [] as unknown as TCard[],
cards: [] as unknown as TCard[],
flippedCards: [] as unknown as TCard[],
currentPlayer: '',
matchedPairs: 0,
moves: 0,
scores: {},
activePlayers: [],
playerMetadata: {},
consecutiveMatches: {},
gameStartTime: null,
gameEndTime: null,
currentMoveStartTime: null,
celebrationAnimations: [],
isProcessingMove: false,
showMismatchFeedback: false,
lastMatchedPair: null,
playerHovers: {},
},
}
}
function validateSetConfig(state: State, field: string, value: any): ValidationResult {
if (state.gamePhase !== 'setup') {
return {
valid: false,
error: 'Cannot change configuration outside of setup phase',
}
}
const error = variant.validateConfigField(field, value)
if (error) {
return { valid: false, error }
}
const clearPausedGame = !!state.pausedGamePhase
// Build new config to compute totalPairs
const configUpdate: Record<string, any> = { [field]: value }
const newConfigState = { ...state, ...configUpdate } as TConfig
const newTotalPairs = variant.getTotalPairs(newConfigState)
return {
valid: true,
newState: {
...state,
[field]: value,
totalPairs: newTotalPairs,
...(clearPausedGame
? {
pausedGamePhase: undefined,
pausedGameState: undefined,
originalConfig: undefined,
}
: {}),
},
}
}
function validateResumeGame(state: State): ValidationResult {
if (state.gamePhase !== 'setup') {
return { valid: false, error: 'Can only resume from setup phase' }
}
if (!state.pausedGamePhase || !state.pausedGameState) {
return { valid: false, error: 'No paused game to resume' }
}
if (state.originalConfig) {
const configFromState = extractConfig(state)
if (variant.hasConfigChangedFrom(configFromState, state.originalConfig)) {
return {
valid: false,
error: 'Cannot resume - configuration has changed',
}
}
}
return {
valid: true,
newState: {
...state,
gamePhase: state.pausedGamePhase,
gameCards: state.pausedGameState.gameCards,
cards: state.pausedGameState.gameCards,
currentPlayer: state.pausedGameState.currentPlayer,
matchedPairs: state.pausedGameState.matchedPairs,
moves: state.pausedGameState.moves,
scores: state.pausedGameState.scores,
activePlayers: state.pausedGameState.activePlayers,
playerMetadata: state.pausedGameState.playerMetadata,
consecutiveMatches: state.pausedGameState.consecutiveMatches,
gameStartTime: state.pausedGameState.gameStartTime,
pausedGamePhase: undefined,
pausedGameState: undefined,
},
}
}
function validateHoverCard(
state: State,
cardId: string | null,
playerId: string
): ValidationResult {
return {
valid: true,
newState: {
...state,
playerHovers: {
...state.playerHovers,
[playerId]: cardId,
},
},
}
}
/**
* Extract TConfig from the full state.
* The state is State = MatchingPairsState & TConfig,
* so variant config fields are top-level.
*/
function extractConfig(state: State): TConfig {
// We reconstruct from defaultConfig keys
const config = {} as any
for (const key of Object.keys(variant.defaultConfig)) {
config[key] = (state as any)[key]
}
return config as TConfig
}
function buildInitialState(config: TConfig): State {
const totalPairs = variant.getTotalPairs(config)
const baseState: MatchingPairsState<TCard, TConfig> = {
cards: [] as unknown as TCard[],
gameCards: [] as unknown as TCard[],
flippedCards: [] as unknown as TCard[],
difficulty: config.difficulty,
turnTimer: config.turnTimer,
gamePhase: 'setup',
currentPlayer: '',
matchedPairs: 0,
totalPairs,
moves: 0,
scores: {},
activePlayers: [],
playerMetadata: {},
consecutiveMatches: {},
gameStartTime: null,
gameEndTime: null,
currentMoveStartTime: null,
celebrationAnimations: [],
isProcessingMove: false,
showMismatchFeedback: false,
lastMatchedPair: null,
originalConfig: undefined,
pausedGamePhase: undefined,
pausedGameState: undefined,
playerHovers: {},
}
// Merge variant config fields into state
return { ...baseState, ...config } as State
}
const validator: GameValidator<State, Move> = {
stateSchema: variant.stateSchema,
validateMove(
state: State,
move: Move,
context?: { userId?: string; playerOwnership?: Record<string, string> }
): ValidationResult {
switch (move.type) {
case 'FLIP_CARD':
return validateFlipCard(state, move.data.cardId, move.playerId, context)
case 'START_GAME':
return validateStartGame(
state,
move.data.activePlayers,
move.data.cards,
move.data.playerMetadata
)
case 'CLEAR_MISMATCH':
return validateClearMismatch(state)
case 'GO_TO_SETUP':
return validateGoToSetup(state)
case 'SET_CONFIG':
return validateSetConfig(state, move.data.field, move.data.value)
case 'RESUME_GAME':
return validateResumeGame(state)
case 'HOVER_CARD':
return validateHoverCard(state, move.data.cardId, move.playerId)
default:
return {
valid: false,
error: `Unknown move type: ${(move as any).type}`,
}
}
},
isGameComplete(state: State): boolean {
return state.gamePhase === 'results' || state.matchedPairs === state.totalPairs
},
getInitialState(config: unknown): State {
const typedConfig = config as TConfig
if (typedConfig.skipSetupPhase) {
const gameCards = variant.generateCards(typedConfig)
const state = buildInitialState(typedConfig)
return {
...state,
gameCards,
cards: gameCards,
gamePhase: 'playing',
gameStartTime: Date.now(),
originalConfig: variant.getOriginalConfig(typedConfig),
}
}
return buildInitialState(typedConfig)
},
getInitialStateForPracticeBreak(config: unknown, options: PracticeBreakOptions): State {
const defaults = variant.practiceBreakDefaults ?? variant.defaultConfig
let fullConfig: TConfig = {
...defaults,
...(config as Partial<TConfig>),
}
if (variant.adjustConfigForBreak) {
fullConfig = variant.adjustConfigForBreak(fullConfig, options.maxDurationMinutes)
} else if (options.maxDurationMinutes <= 3 && fullConfig.difficulty > 6) {
fullConfig = { ...fullConfig, difficulty: 6 as any }
}
const gameCards = variant.generateCards(fullConfig)
const playerId = options.playerId
const playerMetadata: Record<string, any> = {
[playerId]: {
id: playerId,
name: options.playerName || 'Player',
emoji: '🎮',
userId: playerId,
},
}
// Build player arrays starting with the primary player
const activePlayers: string[] = [playerId]
const scores: Record<string, number> = { [playerId]: 0 }
const consecutiveMatches: Record<string, number> = { [playerId]: 0 }
// Include additional players (observers joining at game start)
if (options.additionalPlayers) {
for (const ap of options.additionalPlayers) {
activePlayers.push(ap.playerId)
scores[ap.playerId] = 0
consecutiveMatches[ap.playerId] = 0
playerMetadata[ap.playerId] = {
id: ap.playerId,
name: ap.playerName,
emoji: ap.emoji,
userId: ap.userId,
color: ap.color,
}
}
}
const state = buildInitialState(fullConfig)
return {
...state,
cards: gameCards,
gameCards,
gamePhase: 'playing',
currentPlayer: playerId,
scores,
activePlayers,
playerMetadata,
consecutiveMatches,
gameStartTime: Date.now(),
originalConfig: variant.getOriginalConfig(fullConfig),
}
},
}
// Attach getResultsReport as a non-interface method
;(validator as any).getResultsReport = (state: State, config: TConfig): GameResultsReport => {
if (variant.getResultsReport) {
return variant.getResultsReport(state, config)
}
return defaultGetResultsReport(state, config, variant.gameName)
}
return validator
}
|