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* MCP Tool implementations for curriculum data access
*/
import { eq, or, inArray, desc, and, gte } from 'drizzle-orm'
import { db, schema } from '@/db'
import { parentChild, worksheetShares } from '@/db/schema'
import type { GameBreakSettings } from '@/db/schema/session-plans'
import { getAllSkillMastery, getRecentSessions } from '@/lib/curriculum/progress-manager'
import {
getRecentSessionResults,
generateSessionPlan,
getActiveSessionPlan,
approveSessionPlan,
startSessionPlan,
completeSessionPlanEarly,
abandonSessionPlan,
type EnabledParts,
} from '@/lib/curriculum/session-planner'
import {
createSessionShare,
getActiveSharesForSession,
type ShareDuration,
} from '@/lib/session-share'
import { getShareUrl } from '@/lib/share/urls'
import { generateShareId, isValidShareId } from '@/lib/generateShareId'
import {
DIFFICULTY_PROFILES,
DIFFICULTY_PROGRESSION,
type DifficultyProfile,
} from '@/app/create/worksheets/difficultyProfiles'
import {
serializeAdditionConfig,
parseAdditionConfig,
defaultAdditionConfig,
type AdditionConfigV4Custom,
} from '@/app/create/worksheets/config-schemas'
import type { DisplayRules, RuleMode } from '@/app/create/worksheets/displayRules'
// Tool definitions for MCP tools/list response
export const MCP_TOOLS = [
{
name: 'list_students',
description:
'List all students (players) accessible to this API key. Returns player IDs, names, and emojis.',
inputSchema: {
type: 'object',
properties: {},
required: [],
},
},
{
name: 'get_student_overview',
description:
'Get a quick overview of a student including skill counts, last practice date, and current streak.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
},
required: ['player_id'],
},
},
{
name: 'get_skills',
description:
'Get detailed skill mastery levels for a student. Can filter by status (strong/developing/weak) or category.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
status: {
type: 'string',
enum: ['strong', 'developing', 'weak'],
description: 'Filter by mastery status',
},
category: {
type: 'string',
description:
'Filter by skill category (basic, fiveComplements, tenComplements, fiveComplementsSub, tenComplementsSub, advanced)',
},
},
required: ['player_id'],
},
},
{
name: 'get_recent_errors',
description:
'Get recent incorrect answers for a student. Useful for identifying patterns and targeting practice.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
days: {
type: 'number',
description: 'Number of days to look back (default: 7)',
},
skill_id: {
type: 'string',
description: 'Filter to a specific skill ID',
},
limit: {
type: 'number',
description: 'Maximum number of errors to return (default: 20)',
},
},
required: ['player_id'],
},
},
{
name: 'get_practice_sessions',
description:
'Get recent practice session history showing when and how much a student practiced.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
days: {
type: 'number',
description: 'Number of days to look back (default: 14)',
},
},
required: ['player_id'],
},
},
{
name: 'get_recommended_focus',
description:
'Get skill recommendations based on mastery levels. Returns skills that need the most practice.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
count: {
type: 'number',
description: 'Number of recommendations to return (default: 5)',
},
},
required: ['player_id'],
},
},
// Session management tools
{
name: 'start_practice_session',
description:
'Create and optionally start a new practice session for a student. Returns URLs for practice and observation.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
duration_minutes: {
type: 'number',
description: 'Session duration in minutes (5-60)',
},
auto_start: {
type: 'boolean',
description:
'If true, immediately approve and start the session. If false (default), creates a draft that needs approval.',
},
enabled_parts: {
type: 'object',
description: 'Which practice parts to enable. Default: all enabled.',
properties: {
abacus: {
type: 'boolean',
description: 'Physical abacus practice (default: true)',
},
visualization: {
type: 'boolean',
description: 'Mental math with visualization (default: true)',
},
linear: {
type: 'boolean',
description: 'Mental math with equations (default: true)',
},
},
},
max_terms: {
type: 'number',
description: 'Maximum terms per problem (3-12, default: 5)',
},
game_breaks: {
type: 'object',
description: 'Game break settings between session parts',
properties: {
enabled: {
type: 'boolean',
description: 'Allow game breaks (default: true)',
},
max_minutes: {
type: 'number',
description: 'Maximum game break duration in minutes (default: 5)',
},
selection_mode: {
type: 'string',
enum: ['auto-start', 'kid-chooses'],
description: 'How game is selected (default: kid-chooses)',
},
},
},
},
required: ['player_id', 'duration_minutes'],
},
},
{
name: 'get_active_session',
description:
'Get the current active practice session for a student, including URLs for practice and observation.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
},
required: ['player_id'],
},
},
{
name: 'control_session',
description:
'Control an active session: approve a draft, start an approved session, end early, or abandon.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
session_id: {
type: 'string',
description: 'The session plan ID',
},
action: {
type: 'string',
enum: ['approve', 'start', 'end_early', 'abandon'],
description: 'Action to perform on the session',
},
},
required: ['player_id', 'session_id', 'action'],
},
},
{
name: 'create_observation_link',
description:
'Generate a shareable URL that allows anyone (without login) to observe a practice session in real-time.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
session_id: {
type: 'string',
description: 'The session plan ID',
},
expires_in: {
type: 'string',
enum: ['1h', '24h'],
description: 'How long the link should be valid',
},
},
required: ['player_id', 'session_id', 'expires_in'],
},
},
{
name: 'list_observation_links',
description: 'List all active (non-expired, non-revoked) observation links for a session.',
inputSchema: {
type: 'object',
properties: {
player_id: {
type: 'string',
description: 'The student player ID',
},
session_id: {
type: 'string',
description: 'The session plan ID',
},
},
required: ['player_id', 'session_id'],
},
},
// Worksheet generation tools
{
name: 'generate_worksheet',
description:
'Generate a math worksheet with configurable difficulty, scaffolding, and layout. Returns share and download URLs.',
inputSchema: {
type: 'object',
properties: {
operator: {
type: 'string',
enum: ['addition', 'subtraction', 'mixed'],
description: 'Type of math operation (default: addition)',
},
digit_range: {
type: 'object',
description: 'Range of digits per number (default: { min: 2, max: 2 })',
properties: {
min: {
type: 'number',
description: 'Minimum digits (1-5)',
},
max: {
type: 'number',
description: 'Maximum digits (1-5)',
},
},
},
problems_per_page: {
type: 'number',
description: 'Number of problems per page (default: 20)',
},
pages: {
type: 'number',
description: 'Number of pages (default: 1)',
},
difficulty_profile: {
type: 'string',
enum: ['beginner', 'earlyLearner', 'practice', 'intermediate', 'advanced', 'expert'],
description: 'Preset difficulty profile that controls regrouping and scaffolding',
},
scaffolding: {
type: 'object',
description:
'Custom scaffolding overrides. When provided, these values override the difficulty profile defaults.',
properties: {
carryBoxes: {
type: 'string',
enum: ['always', 'whenRegrouping', 'whenMultipleRegroups', 'never'],
description: 'When to show carry boxes for addition',
},
answerBoxes: {
type: 'string',
enum: ['always', 'whenRegrouping', 'whenMultipleRegroups', 'never'],
description: 'When to show answer digit boxes',
},
placeValueColors: {
type: 'string',
enum: [
'always',
'whenRegrouping',
'whenMultipleRegroups',
'when3PlusDigits',
'never',
],
description: 'When to color-code place values',
},
tenFrames: {
type: 'string',
enum: ['always', 'whenRegrouping', 'whenMultipleRegroups', 'never'],
description: 'When to show ten frames for visual support',
},
borrowNotation: {
type: 'string',
enum: ['always', 'whenRegrouping', 'never'],
description: 'When to show borrow notation for subtraction',
},
borrowingHints: {
type: 'string',
enum: ['always', 'whenRegrouping', 'whenMultipleRegroups', 'never'],
description: 'When to show borrowing hints for subtraction',
},
},
},
show_problem_numbers: {
type: 'boolean',
description: 'Show problem numbers (1, 2, 3...) next to each problem (default: true)',
},
progressive_difficulty: {
type: 'boolean',
description:
'Increase difficulty across pages. Page 1 has lowest regrouping %, last page has highest. Only applies when pages > 1. (default: false)',
},
include_answer_key: {
type: 'boolean',
description: 'Include answer key pages at end (default: false)',
},
title: {
type: 'string',
description: 'Optional title for the worksheet',
},
orientation: {
type: 'string',
enum: ['portrait', 'landscape'],
description: 'Page orientation (default: landscape)',
},
cols: {
type: 'number',
description: 'Number of columns (1-6, default: 5)',
},
},
required: [],
},
},
{
name: 'get_worksheet_info',
description: 'Get information about an existing shared worksheet by its share ID.',
inputSchema: {
type: 'object',
properties: {
share_id: {
type: 'string',
description: 'The worksheet share ID',
},
},
required: ['share_id'],
},
},
{
name: 'list_difficulty_profiles',
description:
'List all available difficulty profiles with their regrouping and scaffolding settings.',
inputSchema: {
type: 'object',
properties: {},
required: [],
},
},
]
/**
* Get all players accessible to a user (created or linked via parent_child)
*/
export async function listStudents(userId: string) {
// Get player IDs linked via parent_child table
const linkedPlayerIds = await db.query.parentChild.findMany({
where: eq(parentChild.parentUserId, userId),
})
const linkedIds = linkedPlayerIds.map((link) => link.childPlayerId)
// Get all players: created by this user OR linked via parent_child
let players
if (linkedIds.length > 0) {
players = await db.query.players.findMany({
where: or(eq(schema.players.userId, userId), inArray(schema.players.id, linkedIds)),
orderBy: (players, { desc }) => [desc(players.createdAt)],
})
} else {
players = await db.query.players.findMany({
where: eq(schema.players.userId, userId),
orderBy: (players, { desc }) => [desc(players.createdAt)],
})
}
return players.map((p) => ({
playerId: p.id,
name: p.name,
emoji: p.emoji,
}))
}
/**
* Verify a player belongs to a user
*/
export async function verifyPlayerAccess(userId: string, playerId: string): Promise<boolean> {
const students = await listStudents(userId)
return students.some((s) => s.playerId === playerId)
}
/**
* Get student overview with skill counts and practice info
*/
export async function getStudentOverview(playerId: string) {
const player = await db.query.players.findFirst({
where: eq(schema.players.id, playerId),
})
if (!player) {
throw new Error('Player not found')
}
const skills = await getAllSkillMastery(playerId)
const recentSessions = await getRecentSessions(playerId, 30)
// Count by status
const strong = skills.filter((s) => s.isPracticing && s.lastPracticedAt).length
const developing = skills.filter((s) => s.isPracticing && !s.lastPracticedAt).length
// Find last practice date
const lastSession = recentSessions[0]
const lastPracticed = lastSession?.startedAt ?? null
return {
playerId: player.id,
name: player.name,
emoji: player.emoji,
lastPracticed,
totalSkills: skills.length,
strong,
developing,
weak: skills.length - strong - developing,
}
}
/**
* Get detailed skill data with optional filtering
*/
export async function getSkills(playerId: string, status?: string, category?: string) {
const rawSkills = await getAllSkillMastery(playerId)
const sessionResults = await getRecentSessionResults(playerId, 2000)
// Compute skill stats from session results
const skillStats = new Map<
string,
{ attempts: number; correct: number; lastPracticed: Date | null }
>()
for (const result of sessionResults) {
for (const skillId of result.skillsExercised) {
if (!skillStats.has(skillId)) {
skillStats.set(skillId, {
attempts: 0,
correct: 0,
lastPracticed: null,
})
}
const stats = skillStats.get(skillId)!
stats.attempts++
if (result.isCorrect) {
stats.correct++
}
if (!stats.lastPracticed || result.timestamp > stats.lastPracticed) {
stats.lastPracticed = result.timestamp
}
}
}
// Enrich skills with computed stats
let skills = rawSkills.map((skill) => {
const stats = skillStats.get(skill.skillId)
const attempts = stats?.attempts ?? 0
const correct = stats?.correct ?? 0
const accuracy = attempts > 0 ? correct / attempts : 0
// Determine status based on accuracy and attempts
let computedStatus: 'strong' | 'developing' | 'weak'
if (attempts >= 5 && accuracy >= 0.9) {
computedStatus = 'strong'
} else if (attempts >= 3 && accuracy >= 0.7) {
computedStatus = 'developing'
} else {
computedStatus = 'weak'
}
// Parse category from skillId (e.g., "fiveComplements.4=5-1" -> "fiveComplements")
const skillCategory = skill.skillId.split('.')[0]
return {
skillId: skill.skillId,
displayName: skill.skillId.split('.')[1] || skill.skillId,
category: skillCategory,
attempts,
correct,
errors: attempts - correct,
accuracy: Math.round(accuracy * 100),
lastPracticed: stats?.lastPracticed ?? null,
status: computedStatus,
}
})
// Apply filters
if (status) {
skills = skills.filter((s) => s.status === status)
}
if (category) {
skills = skills.filter((s) => s.category === category)
}
return skills
}
/**
* Get recent errors for a student
*/
export async function getRecentErrors(
playerId: string,
days: number = 7,
skillId?: string,
limit: number = 20
) {
const cutoffDate = new Date()
cutoffDate.setDate(cutoffDate.getDate() - days)
const sessionResults = await getRecentSessionResults(playerId, 2000)
// Filter to errors only
let errors = sessionResults
.filter((r) => !r.isCorrect && r.timestamp >= cutoffDate)
.map((r) => ({
timestamp: r.timestamp,
skillsExercised: r.skillsExercised,
responseTimeMs: r.responseTimeMs,
}))
// Filter by skill if specified
if (skillId) {
errors = errors.filter((e) => e.skillsExercised.includes(skillId))
}
// Limit results
return errors.slice(0, limit)
}
/**
* Get practice session history
*/
export async function getPracticeSessions(playerId: string, days: number = 14) {
const sessions = await getRecentSessions(playerId, 100)
const cutoffDate = new Date()
cutoffDate.setDate(cutoffDate.getDate() - days)
return sessions
.filter((s) => s.startedAt && s.startedAt >= cutoffDate)
.map((s) => ({
date: s.startedAt,
completedAt: s.completedAt,
// Duration in minutes if completed
durationMinutes:
s.completedAt && s.startedAt
? Math.round((s.completedAt.getTime() - s.startedAt.getTime()) / 60000)
: null,
}))
}
/**
* Get recommended skills to focus on
*/
export async function getRecommendedFocus(playerId: string, count: number = 5) {
const skills = await getSkills(playerId)
// Sort by priority: weak first, then developing, then by lowest accuracy
const sorted = [...skills].sort((a, b) => {
// Status priority
const statusOrder = { weak: 0, developing: 1, strong: 2 }
const statusDiff = statusOrder[a.status] - statusOrder[b.status]
if (statusDiff !== 0) return statusDiff
// Then by accuracy (lower is higher priority)
return a.accuracy - b.accuracy
})
return sorted.slice(0, count).map((skill) => ({
skillId: skill.skillId,
displayName: skill.displayName,
category: skill.category,
accuracy: skill.accuracy,
attempts: skill.attempts,
status: skill.status,
reason:
skill.status === 'weak'
? 'needs_practice'
: skill.status === 'developing'
? 'close_to_mastery'
: 'maintenance',
}))
}
// ============================================================================
// Session Management Tools
// ============================================================================
/**
* Get the base URL for generating practice/observation URLs
*/
function getBaseUrl(): string {
return process.env.NEXT_PUBLIC_APP_URL || 'https://abaci.one'
}
/**
* Build practice and observation URLs for a player
*/
function buildSessionUrls(playerId: string) {
const baseUrl = getBaseUrl()
return {
practiceUrl: `${baseUrl}/practice/${playerId}`,
observeUrl: `${baseUrl}/practice/${playerId}/observe`,
}
}
/**
* Start a new practice session for a student
*/
export async function startPracticeSession(
playerId: string,
userId: string,
options: {
durationMinutes: number
autoStart?: boolean
enabledParts?: {
abacus?: boolean
visualization?: boolean
linear?: boolean
}
maxTerms?: number
gameBreaks?: {
enabled?: boolean
maxMinutes?: number
selectionMode?: 'auto-start' | 'kid-chooses'
}
}
) {
const { durationMinutes, autoStart = false, enabledParts, maxTerms, gameBreaks } = options
// Build enabled parts with defaults
const parts: EnabledParts = {
abacus: enabledParts?.abacus ?? true,
visualization: enabledParts?.visualization ?? true,
linear: enabledParts?.linear ?? true,
}
// Build game break settings
const gameBreakSettings: GameBreakSettings | undefined = gameBreaks
? {
enabled: gameBreaks.enabled ?? true,
maxDurationMinutes: gameBreaks.maxMinutes ?? 5,
selectionMode: gameBreaks.selectionMode ?? 'kid-chooses',
selectedGame: null,
skipSetupPhase: true,
}
: undefined
// Generate session plan
let plan = await generateSessionPlan({
playerId,
durationMinutes,
enabledParts: parts,
gameBreakSettings,
...(maxTerms && {
config: {
abacusTermCount: { min: 3, max: maxTerms },
},
}),
})
// If auto_start, approve and start the session
if (autoStart) {
plan = await approveSessionPlan(plan.id)
plan = await startSessionPlan(plan.id)
}
const urls = buildSessionUrls(playerId)
// Build summary from plan parts
const partSummaries = plan.parts.map((part) => ({
partNumber: part.partNumber,
type: part.type,
problemCount: part.slots.length,
estimatedMinutes: part.estimatedMinutes,
}))
const totalProblems = plan.parts.reduce((sum, part) => sum + part.slots.length, 0)
const totalMinutes = plan.parts.reduce((sum, part) => sum + part.estimatedMinutes, 0)
return {
sessionId: plan.id,
status: plan.status,
practiceUrl: urls.practiceUrl,
observeUrl: urls.observeUrl,
summary: {
totalProblemCount: totalProblems,
estimatedMinutes: Math.round(totalMinutes),
parts: partSummaries,
},
}
}
/**
* Get the active session for a student
*/
export async function getActiveSession(playerId: string) {
const plan = await getActiveSessionPlan(playerId)
if (!plan) {
// Get last completed session date
const recentSessions = await getRecentSessions(playerId, 1)
const lastSession = recentSessions[0]
return {
hasActiveSession: false,
lastSessionAt: lastSession?.completedAt?.getTime() ?? null,
}
}
const urls = buildSessionUrls(playerId)
// Calculate progress
const totalProblems = plan.parts.reduce((sum, part) => sum + part.slots.length, 0)
const completedProblems = plan.results.length
const correctAnswers = plan.results.filter((r) => r.isCorrect).length
const accuracy = completedProblems > 0 ? correctAnswers / completedProblems : 0
// Find current position
let currentPart = 1
let currentProblem = 1
for (const part of plan.parts) {
const partResults = plan.results.filter((r) => r.partNumber === part.partNumber)
if (partResults.length < part.slots.length) {
currentPart = part.partNumber
currentProblem = partResults.length + 1
break
}
}
return {
hasActiveSession: true,
sessionId: plan.id,
status: plan.status,
practiceUrl: urls.practiceUrl,
observeUrl: urls.observeUrl,
startedAt: plan.startedAt?.getTime() ?? null,
progress: {
currentPart,
currentProblem,
totalProblems,
completedProblems,
accuracy: Math.round(accuracy * 100),
},
}
}
/**
* Control an active session (approve, start, end, abandon)
*/
export async function controlSession(
playerId: string,
sessionId: string,
action: 'approve' | 'start' | 'end_early' | 'abandon'
) {
let plan
let message: string
switch (action) {
case 'approve':
plan = await approveSessionPlan(sessionId)
message = 'Session approved and ready to start'
break
case 'start':
plan = await startSessionPlan(sessionId)
message = 'Session started'
break
case 'end_early':
plan = await completeSessionPlanEarly(sessionId, 'Ended via MCP')
message = 'Session ended early'
break
case 'abandon':
plan = await abandonSessionPlan(sessionId)
message = 'Session abandoned'
break
}
return {
success: true,
sessionId: plan.id,
newStatus: plan.status,
message,
}
}
/**
* Create a shareable observation link for a session
*/
export async function createObservationLink(
playerId: string,
sessionId: string,
userId: string,
expiresIn: ShareDuration
) {
const share = await createSessionShare(sessionId, playerId, userId, expiresIn)
return {
token: share.id,
url: getShareUrl('observe', share.id),
expiresAt: share.expiresAt.getTime(),
}
}
/**
* List active observation links for a session
*/
export async function listObservationLinks(playerId: string, sessionId: string) {
const shares = await getActiveSharesForSession(sessionId)
return {
shares: shares.map((share) => ({
token: share.id,
url: getShareUrl('observe', share.id),
expiresAt: share.expiresAt.getTime(),
viewCount: share.viewCount,
createdAt: share.createdAt.getTime(),
})),
}
}
// ============================================================================
// Worksheet Generation Tools
// ============================================================================
/**
* Scaffolding override options for MCP tool
*/
export interface ScaffoldingOverrides {
carryBoxes?: RuleMode
answerBoxes?: RuleMode
placeValueColors?: RuleMode
tenFrames?: RuleMode
borrowNotation?: RuleMode
borrowingHints?: RuleMode
}
/**
* Generate a worksheet with the given configuration
* Returns share and download URLs
*/
export async function generateWorksheet(options: {
operator?: 'addition' | 'subtraction' | 'mixed'
digitRange?: { min: number; max: number }
problemsPerPage?: number
pages?: number
difficultyProfile?: string
scaffolding?: ScaffoldingOverrides
showProblemNumbers?: boolean
progressiveDifficulty?: boolean
includeAnswerKey?: boolean
title?: string
orientation?: 'portrait' | 'landscape'
cols?: number
}) {
const baseUrl = getBaseUrl()
// Build config from options, using defaults
const {
operator = 'addition',
digitRange = { min: 2, max: 2 },
problemsPerPage = 20,
pages = 1,
difficultyProfile = 'earlyLearner',
scaffolding,
showProblemNumbers = true,
progressiveDifficulty = false,
includeAnswerKey = false,
title = '',
orientation = 'landscape',
cols = 5,
} = options
// Validate digit range
const validDigitRange = {
min: Math.max(1, Math.min(5, digitRange.min || 2)),
max: Math.max(1, Math.min(5, digitRange.max || 2)),
}
if (validDigitRange.min > validDigitRange.max) {
validDigitRange.max = validDigitRange.min
}
// Get difficulty profile settings
const profile = DIFFICULTY_PROFILES[difficultyProfile] || DIFFICULTY_PROFILES.earlyLearner
// Build display rules by merging profile defaults with custom scaffolding overrides
// Ensure all required fields from DisplayRules interface are present
const displayRules: DisplayRules = {
// Start with profile defaults
carryBoxes: scaffolding?.carryBoxes ?? profile.displayRules.carryBoxes,
answerBoxes: scaffolding?.answerBoxes ?? profile.displayRules.answerBoxes,
placeValueColors: scaffolding?.placeValueColors ?? profile.displayRules.placeValueColors,
tenFrames: scaffolding?.tenFrames ?? profile.displayRules.tenFrames,
borrowNotation: scaffolding?.borrowNotation ?? profile.displayRules.borrowNotation,
borrowingHints: scaffolding?.borrowingHints ?? profile.displayRules.borrowingHints,
// Cell borders from profile or default to 'always'
cellBorders: profile.displayRules.cellBorders ?? 'always',
// Problem numbers controlled by explicit parameter
problemNumbers: showProblemNumbers ? 'always' : 'never',
}
// Validate pages for progressive difficulty
const validPages = Math.max(1, Math.min(20, pages))
// Build worksheet config
const config: AdditionConfigV4Custom = {
version: 4,
mode: 'custom',
operator,
digitRange: validDigitRange,
problemsPerPage: Math.max(1, Math.min(40, problemsPerPage)),
pages: validPages,
cols: Math.max(1, Math.min(6, cols)),
orientation,
name: title,
fontSize: 16,
pAnyStart: profile.regrouping.pAnyStart,
pAllStart: profile.regrouping.pAllStart,
// Use interpolate for progressive difficulty (problems get harder through worksheet)
interpolate: progressiveDifficulty,
displayRules,
difficultyProfile: profile.name,
includeAnswerKey,
includeQRCode: true, // Always include QR code for MCP-generated worksheets
seed: Math.floor(Math.random() * 1000000), // Random seed for unique problems
// Store progressive difficulty flag for per-page regrouping calculation
...(progressiveDifficulty && validPages > 1 && { progressiveDifficulty: true }),
}
// Generate unique share ID
let shareId = generateShareId()
let attempts = 0
const MAX_ATTEMPTS = 5
let isUnique = false
while (!isUnique && attempts < MAX_ATTEMPTS) {
shareId = generateShareId()
const existing = await db.query.worksheetShares.findFirst({
where: eq(worksheetShares.id, shareId),
})
if (!existing) {
isUnique = true
} else {
attempts++
}
}
if (!isUnique) {
throw new Error('Failed to generate unique share ID')
}
// Serialize config
const configJson = serializeAdditionConfig(config)
// Create share record
await db.insert(worksheetShares).values({
id: shareId,
worksheetType: 'addition',
config: configJson,
createdAt: new Date(),
views: 0,
creatorIp: 'mcp', // Mark as MCP-generated
title: title || null,
})
// Build URLs
const shareUrl = `${baseUrl}/worksheets/shared/${shareId}`
const downloadUrl = `${baseUrl}/api/worksheets/download/${shareId}`
// Build summary
const totalProblems = config.problemsPerPage * config.pages
const summary = {
shareId,
operator: config.operator,
digitRange: config.digitRange,
totalProblems,
pages: config.pages,
problemsPerPage: config.problemsPerPage,
cols: config.cols,
orientation: config.orientation,
difficultyProfile: profile.name,
difficultyLabel: profile.label,
regroupingPercent: Math.round(profile.regrouping.pAnyStart * 100),
includeAnswerKey: config.includeAnswerKey,
progressiveDifficulty: progressiveDifficulty && validPages > 1,
showProblemNumbers,
scaffolding: {
carryBoxes: displayRules.carryBoxes,
answerBoxes: displayRules.answerBoxes,
placeValueColors: displayRules.placeValueColors,
tenFrames: displayRules.tenFrames,
borrowNotation: displayRules.borrowNotation,
borrowingHints: displayRules.borrowingHints,
problemNumbers: displayRules.problemNumbers,
},
}
return {
shareId,
shareUrl,
downloadUrl,
summary,
}
}
/**
* Get information about an existing shared worksheet
*/
export async function getWorksheetInfo(shareId: string) {
// Validate ID format
if (!isValidShareId(shareId)) {
throw new Error('Invalid share ID format')
}
// Fetch share record
const share = await db.query.worksheetShares.findFirst({
where: eq(worksheetShares.id, shareId),
})
if (!share) {
throw new Error('Worksheet not found')
}
// Parse config
const config = parseAdditionConfig(share.config)
const baseUrl = getBaseUrl()
// Find matching difficulty profile
let matchedProfile: DifficultyProfile | undefined
if (config.mode === 'custom' && config.difficultyProfile) {
matchedProfile = DIFFICULTY_PROFILES[config.difficultyProfile]
}
const totalProblems = config.problemsPerPage * config.pages
return {
shareId: share.id,
shareUrl: `${baseUrl}/worksheets/shared/${share.id}`,
downloadUrl: `${baseUrl}/api/worksheets/download/${share.id}`,
title: share.title,
worksheetType: share.worksheetType,
createdAt: share.createdAt.toISOString(),
views: share.views,
config: {
operator: config.operator,
digitRange: config.digitRange,
totalProblems,
pages: config.pages,
problemsPerPage: config.problemsPerPage,
cols: config.cols,
orientation: config.orientation,
difficultyProfile: matchedProfile?.name || 'custom',
difficultyLabel: matchedProfile?.label || 'Custom',
regroupingPercent: Math.round(config.pAnyStart * 100),
includeAnswerKey: config.includeAnswerKey || false,
},
}
}
/**
* List all available difficulty profiles
*/
export function listDifficultyProfiles() {
return {
profiles: DIFFICULTY_PROGRESSION.map((name) => {
const profile = DIFFICULTY_PROFILES[name]
return {
name: profile.name,
label: profile.label,
description: profile.description,
regrouping: {
pAnyStart: profile.regrouping.pAnyStart,
pAllStart: profile.regrouping.pAllStart,
percent: Math.round(profile.regrouping.pAnyStart * 100),
},
scaffolding: {
carryBoxes: profile.displayRules.carryBoxes,
answerBoxes: profile.displayRules.answerBoxes,
placeValueColors: profile.displayRules.placeValueColors,
tenFrames: profile.displayRules.tenFrames,
borrowNotation: profile.displayRules.borrowNotation,
borrowingHints: profile.displayRules.borrowingHints,
},
}
}),
progression: DIFFICULTY_PROGRESSION,
}
}
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