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* Family Manager Module
*
* Manages parent-child relationships:
* - Link parent to child via family code
* - Get linked parents for a child
* - Unlink parent from child
* - Generate family codes
*/
import { and, eq } from 'drizzle-orm'
import { db } from '@/db'
import {
familyEvents,
generateFamilyCode,
parentChild,
type Player,
players,
users,
type User,
} from '@/db/schema'
import { syncParentLink, removeParentLink } from '@/lib/auth/sync-relationships'
import { autoFormHousehold } from '@/lib/household'
import { notifyParentLinked } from '@/lib/notifications/family-link-email'
/** Maximum number of parents that can be linked to a single child */
export const MAX_PARENTS_PER_CHILD = 4
/** Number of days before a family code expires */
export const FAMILY_CODE_EXPIRY_DAYS = 7
/**
* Result of linking a parent to a child
*/
export interface LinkResult {
success: boolean
player?: Player
error?: string
}
/**
* Link a parent to a child via family code
*
* Parents share family codes to link another parent to their child.
* This creates a many-to-many relationship where children can have
* multiple parents with equal access.
*/
export async function linkParentToChild(
parentUserId: string,
familyCode: string
): Promise<LinkResult> {
// Normalize code
const normalizedCode = familyCode.toUpperCase().trim()
// Find player by family code
const player = await db.query.players.findFirst({
where: eq(players.familyCode, normalizedCode),
})
if (!player) {
return { success: false, error: 'Invalid family code' }
}
// Check if family code has expired (7-day window)
if (player.familyCode) {
const generatedAt = player.familyCodeGeneratedAt
if (!generatedAt) {
// Code exists but no timestamp — treat as expired (legacy code without timestamp)
return {
success: false,
error: 'This family code has expired. Ask the parent to regenerate it.',
}
}
const expiresAt = new Date(
generatedAt.getTime() + FAMILY_CODE_EXPIRY_DAYS * 24 * 60 * 60 * 1000
)
if (new Date() > expiresAt) {
return {
success: false,
error: 'This family code has expired. Ask the parent to regenerate it.',
}
}
}
// Only students owned by non-guest (authenticated) users can be shared.
// Guest-created students are ephemeral and shouldn't be linked to other accounts.
const owner = await db.query.users.findFirst({
where: eq(users.id, player.userId),
})
if (!owner?.upgradedAt) {
return { success: false, error: 'This student cannot be shared' }
}
// Check if already linked
const existing = await db.query.parentChild.findFirst({
where: and(
eq(parentChild.parentUserId, parentUserId),
eq(parentChild.childPlayerId, player.id)
),
})
if (existing) {
return { success: false, error: 'Already linked to this child' }
}
// Check parent cap
const existingParents = await db.query.parentChild.findMany({
where: eq(parentChild.childPlayerId, player.id),
})
if (existingParents.length >= MAX_PARENTS_PER_CHILD) {
return {
success: false,
error: `This student already has the maximum number of linked parents (${MAX_PARENTS_PER_CHILD})`,
}
}
// Create link
await db.insert(parentChild).values({
parentUserId,
childPlayerId: player.id,
})
// Record event (non-fatal)
recordFamilyEvent(player.id, 'parent_linked', parentUserId, parentUserId).catch((err) =>
console.error('[family-events] Failed to record parent_linked:', err)
)
// Sync to Casbin (non-fatal)
syncParentLink(parentUserId, player.id).catch((err) =>
console.error('[auth-sync] Failed to sync parent link:', err)
)
// Auto-form household between child owner and linking parent (non-fatal)
autoFormHousehold(player.userId, parentUserId).catch((err) =>
console.error('[household] Failed to auto-form household:', err)
)
// Notify existing parents (non-fatal)
notifyParentLinked(player.id, player.name, parentUserId).catch((err) =>
console.error('[family-notify] Failed to send parent link notification:', err)
)
return { success: true, player }
}
/**
* Get all parents linked to a child
*/
export async function getLinkedParents(playerId: string): Promise<User[]> {
const links = await db.query.parentChild.findMany({
where: eq(parentChild.childPlayerId, playerId),
})
if (links.length === 0) return []
const parentIds = links.map((l) => l.parentUserId)
const linkedParents = await db.query.users.findMany({
where: (users, { inArray }) => inArray(users.id, parentIds),
})
return linkedParents
}
/**
* Get all parent user IDs for a child (simpler version)
*/
export async function getLinkedParentIds(playerId: string): Promise<string[]> {
const links = await db.query.parentChild.findMany({
where: eq(parentChild.childPlayerId, playerId),
})
return links.map((l) => l.parentUserId)
}
/**
* Get all children linked to a parent
*/
export async function getLinkedChildren(parentUserId: string): Promise<Player[]> {
const links = await db.query.parentChild.findMany({
where: eq(parentChild.parentUserId, parentUserId),
})
if (links.length === 0) return []
const childIds = links.map((l) => l.childPlayerId)
const linkedChildren = await db.query.players.findMany({
where: (players, { inArray }) => inArray(players.id, childIds),
})
return linkedChildren
}
/**
* Unlink a parent from a child
*
* Note: The last parent cannot be unlinked (every child must have at least one parent).
* Returns error if trying to unlink the only parent.
*/
export async function unlinkParentFromChild(
parentUserId: string,
playerId: string,
actorUserId?: string
): Promise<{ success: boolean; error?: string }> {
// Check how many parents this child has
const parentCount = await db.query.parentChild.findMany({
where: eq(parentChild.childPlayerId, playerId),
})
if (parentCount.length <= 1) {
return { success: false, error: 'Cannot unlink the only parent' }
}
// Remove the link
await db
.delete(parentChild)
.where(and(eq(parentChild.parentUserId, parentUserId), eq(parentChild.childPlayerId, playerId)))
// Record event (non-fatal)
recordFamilyEvent(playerId, 'parent_unlinked', actorUserId ?? parentUserId, parentUserId).catch(
(err) => console.error('[family-events] Failed to record parent_unlinked:', err)
)
// Sync to Casbin (non-fatal)
removeParentLink(parentUserId, playerId).catch((err) =>
console.error('[auth-sync] Failed to remove parent link:', err)
)
return { success: true }
}
/**
* Result of getting or creating a family code
*/
export interface FamilyCodeResult {
familyCode: string
generatedAt: Date | null
}
/**
* Get the family code for a player, generating one if needed
*/
export async function getOrCreateFamilyCode(playerId: string): Promise<FamilyCodeResult | null> {
const player = await db.query.players.findFirst({
where: eq(players.id, playerId),
})
if (!player) return null
if (player.familyCode) {
return {
familyCode: player.familyCode,
generatedAt: player.familyCodeGeneratedAt ?? null,
}
}
// Generate and save new family code
const newCode = generateFamilyCode()
const now = new Date()
await db
.update(players)
.set({ familyCode: newCode, familyCodeGeneratedAt: now })
.where(eq(players.id, playerId))
return { familyCode: newCode, generatedAt: now }
}
/**
* Regenerate family code for a player
*
* Use this if a parent wants to invalidate an old code that was shared.
* Note: This won't affect existing parent-child links.
*/
export async function regenerateFamilyCode(
playerId: string,
userId?: string
): Promise<string | null> {
const player = await db.query.players.findFirst({
where: eq(players.id, playerId),
})
if (!player) return null
const newCode = generateFamilyCode()
await db
.update(players)
.set({ familyCode: newCode, familyCodeGeneratedAt: new Date() })
.where(eq(players.id, playerId))
// Record event (non-fatal)
if (userId) {
recordFamilyEvent(playerId, 'code_regenerated', userId).catch((err) =>
console.error('[family-events] Failed to record code_regenerated:', err)
)
}
return newCode
}
/**
* Record a family event for the audit log
*/
async function recordFamilyEvent(
childPlayerId: string,
eventType: 'parent_linked' | 'parent_unlinked' | 'code_regenerated',
actorUserId: string,
targetUserId?: string
): Promise<void> {
await db.insert(familyEvents).values({
childPlayerId,
eventType,
actorUserId,
targetUserId: targetUserId ?? null,
})
}
/**
* Get recent family events for a child (last 7 days, max 20)
*/
export async function getRecentFamilyEvents(playerId: string) {
const sevenDaysAgo = new Date(Date.now() - 7 * 24 * 60 * 60 * 1000)
const events = await db.query.familyEvents.findMany({
where: and(
eq(familyEvents.childPlayerId, playerId)
// created_at is stored as unix timestamp in seconds
// We need to compare with the timestamp value
),
orderBy: (familyEvents, { desc }) => [desc(familyEvents.createdAt)],
limit: 20,
})
// Filter by date in JS since drizzle timestamp mode stores as Date
return events.filter((e) => e.createdAt >= sevenDaysAgo)
}
// Re-export the generateFamilyCode function from schema for convenience
export { generateFamilyCode } from '@/db/schema'
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