initial: standalone repo from monorepo split
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kevin-asprec
209
src/accounting/accounting.service.ts
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209
src/accounting/accounting.service.ts
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import { Injectable, NotFoundException, ConflictException, BadRequestException } from '@nestjs/common';
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import { PrismaService } from '../prisma/prisma.service';
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import { CreateAccountDto } from './dto/create-coa.dto';
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// Default Chart of Accounts for new tenants
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const DEFAULT_COA = [
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{ code: '1000', name: 'Assets', type: 'asset', isSystem: true },
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{ code: '1010', name: 'Cash on Hand', type: 'asset', isSystem: true },
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{ code: '1020', name: 'GCash Business', type: 'asset', isSystem: true },
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{ code: '1030', name: 'Maya Business', type: 'asset', isSystem: true },
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{ code: '1040', name: 'Bank Account', type: 'asset', isSystem: true },
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{ code: '1100', name: 'Accounts Receivable', type: 'asset', isSystem: true },
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{ code: '1200', name: 'Equipment', type: 'asset', isSystem: true },
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{ code: '2000', name: 'Liabilities', type: 'liability', isSystem: true },
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{ code: '2010', name: 'Accounts Payable', type: 'liability', isSystem: true },
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{ code: '3000', name: 'Equity', type: 'equity', isSystem: true },
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{ code: '3010', name: 'Owner\'s Equity', type: 'equity', isSystem: true },
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{ code: '3020', name: 'Retained Earnings', type: 'equity', isSystem: true },
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{ code: '4000', name: 'Revenue', type: 'revenue', isSystem: true },
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{ code: '4010', name: 'Internet Service Revenue', type: 'revenue', isSystem: true },
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{ code: '4020', name: 'Installation Fees', type: 'revenue', isSystem: true },
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{ code: '5000', name: 'Expenses', type: 'expense', isSystem: true },
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{ code: '5010', name: 'Utilities Expense', type: 'expense', isSystem: true },
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{ code: '5020', name: 'Salaries Expense', type: 'expense', isSystem: true },
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{ code: '5030', name: 'Maintenance Expense', type: 'expense', isSystem: true },
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{ code: '5040', name: 'Transport Expense', type: 'expense', isSystem: true },
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{ code: '5050', name: 'Supplies Expense', type: 'expense', isSystem: true },
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{ code: '5060', name: 'Equipment Expense', type: 'expense', isSystem: true },
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];
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@Injectable()
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export class AccountingService {
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constructor(private readonly prisma: PrismaService) {}
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async getChartOfAccounts(tenantId: string) {
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const accounts = await this.prisma.chartOfAccount.findMany({
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where: { tenantId },
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orderBy: { code: 'asc' },
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});
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// Auto-seed if empty
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if (accounts.length === 0) {
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await this.seedDefaultAccounts(tenantId);
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return this.prisma.chartOfAccount.findMany({ where: { tenantId }, orderBy: { code: 'asc' } });
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}
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return accounts;
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}
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async seedDefaultAccounts(tenantId: string) {
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for (const acc of DEFAULT_COA) {
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await this.prisma.chartOfAccount.upsert({
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where: { tenantId_code: { tenantId, code: acc.code } },
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create: { tenantId, ...acc },
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update: {},
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});
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}
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}
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async createAccount(tenantId: string, dto: CreateAccountDto) {
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const existing = await this.prisma.chartOfAccount.findFirst({
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where: { tenantId, code: dto.code },
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});
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if (existing) throw new ConflictException('Account code already exists');
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return this.prisma.chartOfAccount.create({
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data: { tenantId, code: dto.code, name: dto.name, type: dto.type, parentId: dto.parentId },
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});
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}
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async deleteAccount(tenantId: string, id: string) {
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const account = await this.prisma.chartOfAccount.findFirst({ where: { id, tenantId } });
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if (!account) throw new NotFoundException('Account not found');
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if (account.isSystem) throw new BadRequestException('Cannot delete system account');
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const hasEntries = await this.prisma.journalLine.count({ where: { accountId: id } });
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if (hasEntries > 0) throw new BadRequestException('Cannot delete account with journal entries');
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await this.prisma.chartOfAccount.delete({ where: { id } });
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return { deleted: true };
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}
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async getGeneralLedger(tenantId: string, accountId?: string) {
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const where: any = {};
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if (accountId) {
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where.accountId = accountId;
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} else {
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where.journalEntry = { tenantId };
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}
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return this.prisma.journalLine.findMany({
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where,
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include: {
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account: { select: { code: true, name: true, type: true } },
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journalEntry: { select: { entryDate: true, description: true, reference: true } },
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},
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orderBy: { journalEntry: { entryDate: 'desc' } },
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take: 100,
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});
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}
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async getTrialBalance(tenantId: string) {
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const accounts = await this.prisma.chartOfAccount.findMany({
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where: { tenantId },
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include: {
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journalLines: { select: { debit: true, credit: true } },
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},
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orderBy: { code: 'asc' },
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});
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return accounts.map((a) => {
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const totalDebit = a.journalLines.reduce((s, l) => s + Number(l.debit), 0);
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const totalCredit = a.journalLines.reduce((s, l) => s + Number(l.credit), 0);
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return {
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id: a.id,
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code: a.code,
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name: a.name,
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type: a.type,
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debit: totalDebit,
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credit: totalCredit,
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balance: totalDebit - totalCredit,
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};
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}).filter((a) => a.debit > 0 || a.credit > 0);
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}
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async getAccountingOverview(tenantId: string) {
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const now = new Date();
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const monthStart = new Date(now.getFullYear(), now.getMonth(), 1);
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// All accounts with their full journal lines
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const accounts = await this.prisma.chartOfAccount.findMany({
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where: { tenantId },
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include: {
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journalLines: {
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select: { debit: true, credit: true, journalEntry: { select: { entryDate: true } } },
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},
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},
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orderBy: { code: 'asc' },
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});
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// Compute balances by type (from all journal entries)
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const byType: Record<string, { debit: number; credit: number; balance: number }> = {};
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const cashAccounts: { code: string; name: string; balance: number }[] = [];
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for (const acc of accounts) {
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const totalDebit = acc.journalLines.reduce((s, l) => s + Number(l.debit), 0);
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const totalCredit = acc.journalLines.reduce((s, l) => s + Number(l.credit), 0);
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const balance = totalDebit - totalCredit;
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if (!byType[acc.type]) byType[acc.type] = { debit: 0, credit: 0, balance: 0 };
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byType[acc.type].debit += totalDebit;
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byType[acc.type].credit += totalCredit;
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byType[acc.type].balance += balance;
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// Track individual cash accounts (codes 1010-1040)
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if (['1010', '1020', '1030', '1040'].includes(acc.code)) {
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cashAccounts.push({ code: acc.code, name: acc.name, balance });
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}
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}
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// Monthly income (revenue credits this month)
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const monthlyRevenue = accounts
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.filter((a) => a.type === 'revenue')
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.reduce((sum, acc) => {
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const monthCredits = acc.journalLines
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.filter((l) => new Date(l.journalEntry.entryDate) >= monthStart)
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.reduce((s, l) => s + Number(l.credit), 0);
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return sum + monthCredits;
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}, 0);
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// Monthly expenses (expense debits this month)
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const monthlyExpenses = accounts
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.filter((a) => a.type === 'expense')
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.reduce((sum, acc) => {
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const monthDebits = acc.journalLines
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.filter((l) => new Date(l.journalEntry.entryDate) >= monthStart)
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.reduce((s, l) => s + Number(l.debit), 0);
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return sum + monthDebits;
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}, 0);
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// Expense breakdown by category this month
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const expenseBreakdown = accounts
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.filter((a) => a.type === 'expense')
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.map((acc) => ({
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code: acc.code,
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name: acc.name,
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amount: acc.journalLines
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.filter((l) => new Date(l.journalEntry.entryDate) >= monthStart)
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.reduce((s, l) => s + Number(l.debit), 0),
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}))
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.filter((e) => e.amount > 0)
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.sort((a, b) => b.amount - a.amount);
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return {
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totalAssets: byType['asset']?.balance || 0,
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totalLiabilities: byType['liability']?.balance || 0,
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totalEquity: byType['equity']?.balance || 0,
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totalRevenue: byType['revenue']?.credit || 0,
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totalExpenses: byType['expense']?.debit || 0,
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accountsReceivable: accounts.find((a) => a.code === '1100')?.journalLines.reduce((s, l) => s + Number(l.debit) - Number(l.credit), 0) || 0,
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cashAccounts,
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cashOnHand: cashAccounts.reduce((s, a) => s + a.balance, 0),
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monthlyRevenue,
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monthlyExpenses,
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netIncome: monthlyRevenue - monthlyExpenses,
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expenseBreakdown,
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};
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}
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}
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