//! The P0 review's thirteen books (round 3's bounds broke every one) and //! its control (at_limit), written through the writing version's Store //! API: what that version accepted is what every later version must open. use chrono::NaiveDate; use ledger_core::*; use ledger_store::Store; use rust_decimal::Decimal; use std::path::PathBuf; fn d(y: i32, m: u32, day: u32) -> NaiveDate { NaiveDate::from_ymd_opt(y, m, day).unwrap() } fn dec(s: &str) -> Decimal { s.parse().unwrap() } fn usd(s: &str) -> Money { Money::new(dec(s), Currency::USD) } struct B { s: Store, cash: AccountId, eq: AccountId, exp: AccountId } fn books(root: &PathBuf, name: &str) -> B { let dir = root.join(name); let _ = std::fs::remove_dir_all(&dir); std::fs::create_dir_all(&dir).unwrap(); let mut s = Store::create(&dir, Currency::USD).unwrap(); let cash = s.add_account("1000", "Cash", AccountType::Asset, None, false).unwrap(); let eq = s.add_account("3000", "Capital", AccountType::Equity, None, false).unwrap(); let exp = s.add_account("6000", "Rent", AccountType::Expense, None, false).unwrap(); B { s, cash, eq, exp } } fn report(name: &str, r: Result) { match r { Ok(v) => println!("WROTE {name}: {v:?}"), Err(e) => println!("REFUSED {name}: {e}") } } fn main() { let root = PathBuf::from(std::env::args().nth(1).unwrap()); // 1. draft line over the limit { let mut b = books(&root, "draft_big_line"); let e = b.s.create_entry(d(2026,3,1), "big draft").unwrap(); report("draft_big_line", b.s.add_line(e, b.cash, Side::Debit, usd("2000000000000000.00"))); } // 2. entry in year 0 for (name, date) in [("year0_entry", d(0,6,1)), ("year10000_entry", d(10000,1,1)), ("yearneg_entry", d(-1,1,1))] { let mut b = books(&root, name); let r = (|| -> Result { let e = b.s.create_entry(date, "far")?; b.s.add_line(e, b.cash, Side::Debit, usd("10.00"))?; b.s.add_line(e, b.eq, Side::Credit, usd("10.00"))?; b.s.post_entry(e)?; Ok(e) })(); report(name, r); } // 4. asset late for (name, date, life) in [("asset_late", d(9999,1,1), 60u32), ("asset_long_life", d(2026,1,1), 120_000u32)] { let mut b = books(&root, name); let accum = b.s.add_account("1510","Accum",AccountType::Asset,None,false).unwrap(); let fa = b.s.add_account("1500","Equip",AccountType::Asset,None,false).unwrap(); report(name, b.s.register_asset(NewAsset { description: "thing".into(), purchase_date: date, cost: usd("1200.00"), salvage_value: usd("0"), useful_life_months: life, cost_account: fa, accum_depr_account: accum, expense_account: b.exp })); } // 6. tax basis big { let mut b = books(&root, "tax_basis_big"); let accum = b.s.add_account("1510","Accum",AccountType::Asset,None,false).unwrap(); let fa = b.s.add_account("1500","Equip",AccountType::Asset,None,false).unwrap(); let id = b.s.register_asset(NewAsset { description: "thing".into(), purchase_date: d(2026,1,1), cost: usd("1200.00"), salvage_value: usd("0"), useful_life_months: 36, cost_account: fa, accum_depr_account: accum, expense_account: b.exp }).unwrap(); report("tax_basis_big", b.s.set_asset_tax_basis(id, TaxBasis { rule: TaxBasisRule::Carryover, contributor_basis: Some(dec("2000000000000000.00")) })); } // 7. schedule late { let mut b = books(&root, "schedule_late"); let pre = b.s.add_account("1300","Prepaid",AccountType::Asset,None,false).unwrap(); report("schedule_late", b.s.register_schedule(NewSchedule { description: "late".into(), kind: ScheduleKind::PrepaidExpense, total: usd("1200.00"), start: d(9999,6,1), months: 12, balance_account: pre, pl_account: b.exp })); } // 8. recurring big { let mut b = books(&root, "recurring_big"); let big = usd("2000000000000000.00"); report("recurring_big", b.s.register_recurring(NewRecurring { description: "big".into(), lines: vec![(b.exp, Side::Debit, big), (b.cash, Side::Credit, big)], frequency: Frequency::Monthly, start: d(2026,1,1), end: None })); } // 9. shares big { let mut b = books(&root, "shares_big"); let p = b.s.add_party("Acme", &[Role::Member]).unwrap(); let r = (|| -> Result<(), ledger_store::StoreError> { let e = b.s.create_entry(d(2026,3,1), "rent")?; b.s.add_line(e, b.exp, Side::Debit, usd("10.00"))?; b.s.add_line(e, b.cash, Side::Credit, usd("10.00"))?; b.s.post_entry(e)?; b.s.set_entry_parties(e, &[PartyShare { party: p, share: Share::Amount(dec("2000000000000000.00")) }]) })(); report("shares_big", r); } // 10. payroll with sub-cent parts that cancel in the totals { let mut b = books(&root, "payroll_fine"); let line = |n: &str, fed: &str| PayrollLine { employee_name: n.into(), employee: None, gross_pay: dec("100.00"), federal_withholding: dec(fed), state_withholding: Decimal::ZERO, ss_employee: Decimal::ZERO, medicare_employee: Decimal::ZERO, ss_employer: Decimal::ZERO, medicare_employer: Decimal::ZERO, other_deductions: Decimal::ZERO }; report("payroll_fine", b.s.run_payroll(d(2026,3,1), vec![line("A","0.000000000001"), line("B","0.009999999999")], b.cash)); } // 11. invoice with sub-cent lines that cancel { let mut b = books(&root, "invoice_fine"); let c = b.s.add_customer("Cust").unwrap(); report("invoice_fine", b.s.create_invoice(c, d(2026,3,1), d(2026,3,31), vec![ DocumentLine{description:"a".into(), amount: dec("0.00000000001"), account: None, quantity: None, unit_price: None}, DocumentLine{description:"b".into(), amount: dec("9.99999999999"), account: None, quantity: None, unit_price: None}])); } // 12. period year 0 { let mut b = books(&root, "period_year0"); report("period_year0", b.s.create_period("y0", d(0,1,1), d(0,12,31))); } // 13. exactly at the limit (control: must open) { let mut b = books(&root, "at_limit"); let r = (|| -> Result { let e = b.s.create_entry(d(9999,12,31), "max")?; b.s.add_line(e, b.cash, Side::Debit, usd("1000000000000000"))?; b.s.add_line(e, b.eq, Side::Credit, usd("1000000000000000"))?; b.s.post_entry(e)?; Ok(e) })(); report("at_limit", r); } }