chore: optimize the credit functions
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javayhu
parent
12fb19e97b
commit
abf8b31ec7
@ -1,3 +1,4 @@
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import { randomUUID } from 'crypto';
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import { getDb } from '@/db';
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import { creditTransaction, userCredit } from '@/db/schema';
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import { addDays, isAfter } from 'date-fns';
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@ -9,7 +10,11 @@ import {
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REGISTER_GIFT_CREDITS,
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} from './constants';
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// Get user's current credit balance
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/**
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* Get user's current credit balance
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* @param userId - User ID
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* @returns User's current credit balance
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*/
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export async function getUserCredits(userId: string): Promise<number> {
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const db = await getDb();
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const record = await db
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@ -20,8 +25,18 @@ export async function getUserCredits(userId: string): Promise<number> {
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return record[0]?.currentCredits || 0;
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}
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// Write a credit transaction record
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async function logCreditTransaction(params: {
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/**
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* Write a credit transaction record
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* @param params - Credit transaction parameters
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*/
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async function logCreditTransaction({
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userId,
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type,
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amount,
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description,
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paymentId,
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expirationDate,
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}: {
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userId: string;
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type: string;
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amount: number;
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@ -29,28 +44,33 @@ async function logCreditTransaction(params: {
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paymentId?: string;
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expirationDate?: Date;
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}) {
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if (!params.userId || !params.type || !params.description) {
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if (!userId || !type || !description) {
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throw new Error('Invalid params');
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}
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if (!Number.isFinite(params.amount) || params.amount === 0) {
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throw new Error('Amount must be positive');
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if (!Number.isFinite(amount) || amount === 0) {
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throw new Error('Invalid amount');
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}
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const db = await getDb();
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await db.insert(creditTransaction).values({
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id: crypto.randomUUID(),
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userId: params.userId,
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type: params.type,
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amount: params.amount,
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remainingAmount: params.amount > 0 ? params.amount : null,
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description: params.description,
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paymentId: params.paymentId,
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expirationDate: params.expirationDate,
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id: randomUUID(),
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userId,
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type,
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amount,
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// remaining amount is the same as amount for earn transactions
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// remaining amount is null for spend transactions
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remainingAmount: amount > 0 ? amount : null,
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description,
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paymentId,
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expirationDate,
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createdAt: new Date(),
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updatedAt: new Date(),
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});
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}
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// Add credits (registration, monthly, purchase, etc.)
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/**
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* Add credits (registration, monthly, purchase, etc.)
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* @param params - Credit creation parameters
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*/
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export async function addCredits({
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userId,
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amount,
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@ -70,10 +90,10 @@ export async function addCredits({
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throw new Error('Invalid params');
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}
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if (!Number.isFinite(amount) || amount <= 0) {
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throw new Error('Amount must be positive');
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throw new Error('Invalid amount');
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}
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if (!Number.isFinite(expireDays) || expireDays <= 0) {
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throw new Error('expireDays must be positive');
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throw new Error('Invalid expire days');
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}
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// Process expired credits first
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await processExpiredCredits(userId);
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@ -90,16 +110,16 @@ export async function addCredits({
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.update(userCredit)
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.set({
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currentCredits: newBalance,
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lastRefreshAt: new Date(),
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lastRefreshAt: new Date(), // TODO: maybe we can not update this field here
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updatedAt: new Date(),
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})
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.where(eq(userCredit.userId, userId));
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} else {
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await db.insert(userCredit).values({
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id: crypto.randomUUID(),
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id: randomUUID(),
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userId,
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currentCredits: newBalance,
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lastRefreshAt: new Date(),
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lastRefreshAt: new Date(), // TODO: maybe we can not update this field here
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createdAt: new Date(),
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updatedAt: new Date(),
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});
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@ -111,13 +131,15 @@ export async function addCredits({
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amount,
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description,
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paymentId,
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// TODO: maybe there is no expiration date for PURCHASE type?
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expirationDate: addDays(new Date(), expireDays),
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});
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// Refresh session if needed
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// await refreshUserSession(userId);
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}
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// Consume credits (FIFO, by expiration)
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/**
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* Consume credits (FIFO, by expiration)
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* @param params - Credit consumption parameters
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*/
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export async function consumeCredits({
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userId,
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amount,
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@ -131,16 +153,21 @@ export async function consumeCredits({
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throw new Error('Invalid params');
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}
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if (!Number.isFinite(amount) || amount <= 0) {
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throw new Error('Amount must be positive');
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throw new Error('Invalid amount');
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}
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// Process expired credits first
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await processExpiredCredits(userId);
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// Check balance
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const balance = await getUserCredits(userId);
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if (balance < amount) throw new Error('Insufficient credits');
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if (balance < amount) {
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console.error(
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`Insufficient credits for user ${userId}, balance: ${balance}, amount: ${amount}, description: ${description}`
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);
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throw new Error('Insufficient credits');
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}
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// FIFO consumption: consume from the earliest unexpired credits first
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const db = await getDb();
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const txs = await db
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const transactions = await db
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.select()
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.from(creditTransaction)
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.where(
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@ -159,9 +186,9 @@ export async function consumeCredits({
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);
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// Consume credits
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let left = amount;
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for (const tx of txs) {
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for (const transaction of transactions) {
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if (left <= 0) break;
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const remain = tx.remainingAmount || 0;
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const remain = transaction.remainingAmount || 0;
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if (remain <= 0) continue;
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// credits to consume at most in this transaction
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const consume = Math.min(remain, left);
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@ -171,7 +198,7 @@ export async function consumeCredits({
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remainingAmount: remain - consume,
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updatedAt: new Date(),
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})
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.where(eq(creditTransaction.id, tx.id));
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.where(eq(creditTransaction.id, transaction.id));
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left -= consume;
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}
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// Update balance
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@ -181,6 +208,7 @@ export async function consumeCredits({
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.where(eq(userCredit.userId, userId))
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.limit(1);
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const newBalance = (current[0]?.currentCredits || 0) - amount;
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// TODO: there must have one record for this user in userCredit?
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await db
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.update(userCredit)
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.set({ currentCredits: newBalance, updatedAt: new Date() })
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@ -192,23 +220,25 @@ export async function consumeCredits({
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amount: -amount,
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description,
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});
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// Refresh session if needed
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// await refreshUserSession(userId);
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}
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// Process expired credits
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/**
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* Process expired credits
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* @param userId - User ID
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*/
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export async function processExpiredCredits(userId: string) {
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const now = new Date();
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// Get all credit transactions without type EXPIRE
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const db = await getDb();
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const txs = await db
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const transactions = await db
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.select()
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.from(creditTransaction)
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.where(
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and(
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eq(creditTransaction.userId, userId),
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or(
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eq(creditTransaction.type, CREDIT_TRANSACTION_TYPE.PURCHASE),
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// TODO: credits with PURCHASE type can not be expired?
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// eq(creditTransaction.type, CREDIT_TRANSACTION_TYPE.PURCHASE),
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eq(creditTransaction.type, CREDIT_TRANSACTION_TYPE.MONTHLY_REFRESH),
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eq(creditTransaction.type, CREDIT_TRANSACTION_TYPE.REGISTER_GIFT)
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)
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@ -216,13 +246,13 @@ export async function processExpiredCredits(userId: string) {
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);
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let expiredTotal = 0;
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// Process expired credit transactions
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for (const tx of txs) {
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for (const transaction of transactions) {
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if (
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tx.expirationDate &&
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isAfter(now, tx.expirationDate) &&
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!tx.expirationDateProcessedAt
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transaction.expirationDate &&
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isAfter(now, transaction.expirationDate) &&
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!transaction.expirationDateProcessedAt
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) {
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const remain = tx.remainingAmount || 0;
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const remain = transaction.remainingAmount || 0;
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if (remain > 0) {
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expiredTotal += remain;
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await db
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@ -232,7 +262,7 @@ export async function processExpiredCredits(userId: string) {
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expirationDateProcessedAt: now,
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updatedAt: now,
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})
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.where(eq(creditTransaction.id, tx.id));
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.where(eq(creditTransaction.id, transaction.id));
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}
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}
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}
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@ -261,7 +291,10 @@ export async function processExpiredCredits(userId: string) {
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}
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}
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// Add register gift credits
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/**
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* Add register gift credits
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* @param userId - User ID
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*/
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export async function addRegisterGiftCredits(userId: string) {
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// Check if user has already received register gift credits
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const db = await getDb();
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@ -286,7 +319,10 @@ export async function addRegisterGiftCredits(userId: string) {
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}
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}
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// Add free monthly credits
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/**
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* Add free monthly credits
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* @param userId - User ID
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*/
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export async function addMonthlyFreeCredits(userId: string) {
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// Check last refresh time
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const db = await getDb();
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@ -314,10 +350,5 @@ export async function addMonthlyFreeCredits(userId: string) {
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type: CREDIT_TRANSACTION_TYPE.MONTHLY_REFRESH,
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description: `Free monthly credits: ${FREE_MONTHLY_CREDITS} for ${now.getFullYear()}-${now.getMonth() + 1}`,
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});
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// update last refresh time ? addCredits has already updated it
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// await db
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// .update(userCredit)
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// .set({ lastRefresh: now, updatedAt: now })
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// .where(eq(userCredit.userId, userId));
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}
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}
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