Files
wanderbooks/crates/ledger-mcp/src/server.rs
T
swaitsandClaude Opus 5.5 8164abb2b8 fix: period close sweeps only through the period end; partnerships close into members' capital
The close zeroed every revenue and expense account's all-time movement,
so closing a period after later entries were posted swept those too:
close January in March and February's and March's income landed in
January's closing entry. The preview had the same bug and never showed
where the net went. Now:

- close_period_to(id, to) zeroes balances as of the period end; entries
  dated later stay open for their own period. Periods must close in
  order (LedgerError::CloseOutOfOrder): a later close has already swept
  the earlier period.
- CloseTo::Members: for a partnership (multi-member LLC) the net goes to
  each member's capital account by share, to the cent, the last member
  absorbing rounding, which is what K-1 capital accounts track.
  CloseTo::RetainedEarnings (3999) stays the default; close_period is
  shorthand for it. books.close_period picks Members when
  wanderbooks.toml lists members.
- The journal records the close target; replay re-derives the closing
  entry and now compares every line with the journal, not just the id,
  so a change to closing math can never silently rewrite history.
- The tool's preview is the real close run on a clone of the ledger
  (Ledger now derives Clone), so preview and post can't disagree.
- Members' equity: closing entries into a capital account are income,
  not contributions. Balance sheet for a partnership: capital accounts
  (with allocated earnings), then only unallocated earnings —
  "Undistributed earnings, prior years" if any, and this year's unclosed
  net income (loss). periods::allocate is shared by the close and the
  statement.

Tests: January closed after February is posted sweeps exactly Dr 4000
2,500 / Cr 6100 800 / Cr 3999 1,700 (mutation-checked: the old code gives
3,500/120/800/2,580); out-of-order close refused; a partnership close
splits 666.67 into 333.34/333.33 with no 3999, and the members' equity
statement reads correctly before and after; store replay of a members
close (reopen, rebuild, verify); partnership and corporate balance sheet
layouts; stdio close preview equals the posted lines.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MtYEaR6M6Ybdhm6X98BWNu
2026-10-11 20:39:17 -07:00

3276 lines
126 KiB
Rust

//! The MCP server: narrow typed tools over the store, with the receipt
//! policy enforced server-side.
use crate::company::Company;
use crate::policy::ReceiptPolicy;
use crate::types::*;
use chrono::NaiveDate;
use ledger_core::{
AccountId, AccountType, AssetStatus, Currency, DocumentLine, DocumentStatus, JournalEntry,
Ledger, Money, NewAsset, PeriodStatus, Side, accumulated_depreciation, book_value,
depreciation_schedule, reports,
};
use ledger_import::ReportMeta;
use ledger_store::Store;
use rmcp::handler::server::wrapper::{Json, Parameters};
use rmcp::model::{
Implementation, ListResourcesResult, ReadResourceRequestParams, ReadResourceResponse,
ReadResourceResult, Resource, ResourceContents, ServerCapabilities, ServerConfig,
};
use rmcp::service::{RequestContext, RoleServer};
use rmcp::{ServerHandler, tool, tool_handler, tool_router};
use rust_decimal::Decimal;
use std::sync::{Arc, Mutex};
/// The agent operating contract, delivered via initialize.
const INSTRUCTIONS: &str = "You are the bookkeeping agent for these books. The engine enforces the accounting; you enforce the workflow.\n\nRULES\n- Money is exact decimal. Always pass amounts as decimal strings (\"123.45\"), never floats.\n- Never post directly. The flow is draft (books.draft_entry) -> add lines (books.add_line) -> preview (books.post_entry without confirmed) -> review the preview -> post (books.post_entry with confirmed=true).\n- Every entry must balance: debits equal credits, exactly. Every line needs a real account from books.chart. The engine rejects anything else.\n- Receipts: any entry moving more than $25.00 in debits needs at least one receipt attached (books.attach_receipt) before posting. The server rejects the post otherwise. This is enforced, not a suggestion.\n- Never invent accounts. If the account you need does not exist, add it with books.add_account first.\n- Corrections go through books.reverse_entry. Posted entries are immutable; there is no edit.\n- Receipt corrections: receipts can change, but nothing is erased. To replace one, attach the new receipt, then books.unlink_receipt the old (with a reason); retire unwanted receipts or documents with books.withdraw_attachment (with a reason). The journal keeps every step.\n- After posting, check books.digest to review what changed, so a human can review too.\n- Amounts in every response are decimal strings. Treat them as exact.\n- Fixed assets: register with books.register_asset, inspect with books.asset_schedule and books.list_assets, post monthly depreciation with books.run_depreciation (exempt from the receipt policy; the schedule is the evidence), and dispose with books.dispose_asset (preview first; the bill of sale is the receipt). Depreciation is straight-line, book basis only - tax depreciation stays with the CPA.";
/// Max receipt/document upload: 25 MB.
const MAX_UPLOAD_BYTES: usize = 25 * 1024 * 1024;
/// The server. One store, one receipt policy, shared across tool calls.
/// `Store` is `!Sync`, so access is serialized through a mutex; the server
/// is single-writer by construction.
#[derive(Clone)]
pub struct BooksServer {
store: Arc<Mutex<Store>>,
policy: ReceiptPolicy,
company: Company,
}
impl BooksServer {
/// Build the server around an open store.
pub fn new(store: Store, policy: ReceiptPolicy) -> Self {
Self {
store: Arc::new(Mutex::new(store)),
policy,
company: Company::default(),
}
}
/// Build the server around a shared store (for HTTP: each connection
/// gets a handle to the same store).
pub fn new_shared(store: Arc<Mutex<Store>>, policy: ReceiptPolicy) -> Self {
Self {
store,
policy,
company: Company::default(),
}
}
/// Set the company (name for report headers, fiscal year).
pub fn with_company(mut self, company: Company) -> Self {
self.company = company;
self
}
/// Header and provenance for a rendered report.
fn report_meta(&self, store: &Store) -> ReportMeta {
ReportMeta {
company: self.company.name.clone(),
basis: self.company.basis.clone(),
prepared_on: today(),
journal_seq: store.journal_seq(),
}
}
/// Members as reports name them (empty unless a multi-member LLC).
fn report_members(&self) -> Vec<ledger_import::Member> {
self.company
.members
.iter()
.map(|m| ledger_import::Member {
name: m.name.clone(),
capital_code: m.capital_account.clone(),
})
.collect()
}
/// Members with their capital accounts resolved in the chart, for the
/// statement of members' equity.
fn member_capitals(&self, ledger: &Ledger) -> Result<Vec<ledger_core::MemberCapital>, String> {
if self.company.members.is_empty() {
return Err(
"no members configured: add [[company.members]] (name, share, capital_account) to wanderbooks.toml"
.to_string(),
);
}
self.company
.members
.iter()
.map(|m| {
let account = ledger
.chart()
.find_by_code(&m.capital_account)
.ok_or_else(|| {
format!(
"member {}: unknown capital account {}",
m.name, m.capital_account
)
})?;
Ok(ledger_core::MemberCapital {
name: m.name.clone(),
capital_account: account.id,
share: m.share,
})
})
.collect()
}
/// The fiscal year's earnings through `as_of`, for the balance sheet:
/// net income (loss) year to date (closing entries excluded), and the
/// part of it still unclosed (closing entries included, so months
/// already closed into equity drop out).
fn year_earnings(
&self,
ledger: &Ledger,
as_of: NaiveDate,
) -> Result<ledger_import::YearEarnings, String> {
let (fy_start, _) = self.company.fiscal_year_containing(as_of);
let net_income_ytd = ledger_core::profit_and_loss_for_period(ledger, fy_start, as_of, None)
.map_err(|e| e.to_string())?
.net_income();
let mut unclosed = Decimal::ZERO;
for a in ledger.chart().all().filter(|a| !a.placeholder) {
match a.account_type {
AccountType::Revenue => unclosed += movement_in(ledger, a.id, fy_start, as_of),
AccountType::Expense => unclosed -= movement_in(ledger, a.id, fy_start, as_of),
_ => {}
}
}
Ok(ledger_import::YearEarnings {
net_income_ytd,
unclosed,
})
}
fn lock(&self) -> Result<std::sync::MutexGuard<'_, Store>, String> {
self.store
.lock()
.map_err(|_| "store lock poisoned".to_string())
}
/// Fail with the structured `receipt_required` error when the receipt
/// policy requires this posted entry to keep at least one receipt.
/// Drafts pass (posting enforces the policy later); reversals pass (they
/// are exempt: the original carries the evidence).
fn ensure_receipt_not_required(&self, store: &Store, entry_id: u64) -> Result<(), String> {
let entry = store
.ledger()
.get_entry(entry_id)
.ok_or_else(|| format!("unknown entry {entry_id}"))?;
if entry.status() != ledger_core::EntryStatus::Posted || entry.reversal_of().is_some() {
return Ok(());
}
let split_group = self.policy.split_group(store.ledger(), entry_id, entry);
if !self.policy.receipt_required(store.ledger(), entry) && split_group.is_empty() {
return Ok(());
}
let total = ReceiptPolicy::entry_debits(entry);
Err(ReceiptRequiredError {
code: "receipt_required".to_string(),
message: format!(
"entry {entry_id} moves {} in debits ({}); unlinking its last receipt would leave it without one.",
money(total),
self.policy.describe()
),
entry_id: Some(entry_id),
asset_id: None,
debits: total.to_string(),
policy: self.policy.describe(),
remedy_tool: "books.attach_receipt".to_string(),
remedy_hint: format!(
"attach the replacement receipt to entry {entry_id} with books.attach_receipt first, then retry books.unlink_receipt"
),
split_group,
}
.to_tool_error())
}
}
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
fn parse_date(s: &str) -> Result<NaiveDate, String> {
NaiveDate::parse_from_str(s, "%Y-%m-%d")
.map_err(|_| format!("bad date {s:?}: expected YYYY-MM-DD"))
}
fn parse_amount(s: &str) -> Result<Decimal, String> {
s.parse::<Decimal>()
.map_err(|_| format!("bad amount {s:?}: expected a decimal string like \"123.45\""))
}
fn parse_side(s: &str) -> Result<Side, String> {
match s.to_lowercase().as_str() {
"debit" => Ok(Side::Debit),
"credit" => Ok(Side::Credit),
_ => Err(format!("bad side {s:?}: expected \"debit\" or \"credit\"")),
}
}
/// Parse a calendar-month period "YYYY-MM".
fn parse_period_mcp(period: &str) -> Result<(i32, u32), String> {
let err = || format!("bad period {period:?}: expected YYYY-MM");
let mut parts = period.split('-');
let year: i32 = parts.next().ok_or_else(err)?.parse().map_err(|_| err())?;
let month: u32 = parts.next().ok_or_else(err)?.parse().map_err(|_| err())?;
if parts.next().is_some() || year < 1 || !(1..=12).contains(&month) {
return Err(err());
}
Ok((year, month))
}
/// Last calendar day of a month.
fn last_day_of_month(year: i32, month: u32) -> NaiveDate {
let first = NaiveDate::from_ymd_opt(year, month, 1).expect("valid period");
first
.checked_add_months(chrono::Months::new(1))
.expect("month arithmetic")
.pred_opt()
.expect("month arithmetic")
}
fn parse_account_type(s: &str) -> Result<AccountType, String> {
match s.to_lowercase().as_str() {
"asset" => Ok(AccountType::Asset),
"liability" => Ok(AccountType::Liability),
"equity" => Ok(AccountType::Equity),
"revenue" => Ok(AccountType::Revenue),
"expense" => Ok(AccountType::Expense),
_ => Err(format!(
"bad account_type {s:?}: expected asset, liability, equity, revenue, or expense"
)),
}
}
/// Resolve an account reference: a numeric id, or an account code.
fn resolve_account(store: &Store, account: &str) -> Result<AccountId, String> {
if let Ok(id) = account.parse::<u64>()
&& store.ledger().chart().get(id).is_some()
{
return Ok(id);
}
store
.ledger()
.chart()
.find_by_code(account)
.map(|a| a.id)
.ok_or_else(|| format!("unknown account {account:?}: use an id or code from books.chart"))
}
/// Resolve a class by id or name (case-insensitive).
fn resolve_class(store: &Store, class: &str) -> Result<u32, String> {
if let Ok(id) = class.parse::<u32>()
&& store.ledger().get_class(id).is_some()
{
return Ok(id);
}
store
.ledger()
.find_class_by_name(class)
.map(|c| c.id)
.ok_or_else(|| {
format!("unknown class {class:?}: use an id or name from books.list_classes")
})
}
/// A money amount as a decimal string with at least two places: "0.00",
/// "207.68", "1000.00". Padding only, never rounding: an exact amount with
/// more places (an FX-converted line) keeps them. Never "-0".
fn money(n: Decimal) -> String {
let mut n = if n.is_zero() { Decimal::ZERO } else { n };
if n.scale() < 2 {
n.rescale(2);
}
n.to_string()
}
/// Preview lines with resulting balances for raw (account, side, amount) lines.
fn preview_lines_for(
store: &Store,
lines: &[(AccountId, Side, Money)],
) -> Result<Vec<PreviewLine>, String> {
let ledger = store.ledger();
let mut out = Vec::with_capacity(lines.len());
for (account_id, side, amount) in lines {
let account = ledger
.chart()
.get(*account_id)
.ok_or_else(|| format!("unknown account {account_id}"))?;
let before = ledger
.account_balance(*account_id)
.map_err(|e| e.to_string())?;
let normal = account.account_type.normal_side();
let delta = if *side == normal {
amount.amount
} else {
-amount.amount
};
let after = before + delta;
out.push(PreviewLine {
account_id: *account_id,
code: account.code.clone(),
name: account.name.clone(),
side: match side {
Side::Debit => "debit".to_string(),
Side::Credit => "credit".to_string(),
},
amount: money(amount.amount),
balance_before: money(if before.is_zero() {
Decimal::ZERO
} else {
before
}),
balance_after: money(if after.is_zero() {
Decimal::ZERO
} else {
after
}),
});
}
Ok(out)
}
/// Preview lines with resulting balances for an entry.
fn preview_lines(store: &Store, entry: &JournalEntry) -> Result<Vec<PreviewLine>, String> {
let lines: Vec<(AccountId, Side, Money)> = entry
.lines()
.iter()
.map(|l| (l.account, l.side, l.amount))
.collect();
preview_lines_for(store, &lines)
}
fn preview_receipts(store: &Store, entry_id: u64) -> Result<Vec<PreviewReceipt>, String> {
Ok(store
.list_attachments(Some(entry_id))
.map_err(|e| e.to_string())?
.into_iter()
.map(|a| PreviewReceipt {
attachment_id: a.id,
file_name: a.file_name,
sha256: a.blob_sha,
})
.collect())
}
/// Build the cash flow statement from account codes, as the exports need it:
/// `start` defaults to the beginning of time, `end` to today, and at least
/// one cash account is required (the statement reconciles to them).
fn cash_flow_statement(
ledger: &Ledger,
start: Option<&str>,
end: Option<&str>,
cash_codes: &[String],
financing_codes: &[String],
) -> Result<ledger_core::reports::CashFlowStatement, String> {
let resolve = |codes: &[String], what: &str| -> Result<Vec<AccountId>, String> {
codes
.iter()
.map(|code| {
ledger
.chart()
.find_by_code(code)
.map(|a| a.id)
.ok_or_else(|| format!("unknown {what} account code: {code}"))
})
.collect()
};
let cash_accounts = resolve(cash_codes, "cash")?;
if cash_accounts.is_empty() {
return Err("cash_accounts is required for the cash flow statement".to_string());
}
let financing_accounts = resolve(financing_codes, "financing")?;
let (start, end) = statement_range(ledger, start, end)?;
ledger_core::cash_flow(
ledger,
&ledger_core::CashFlowParams {
start,
end,
cash_accounts,
financing_accounts,
},
)
.map_err(|e| e.to_string())
}
/// Net movement of one account over entries in `[from, to]`, normal side.
fn movement_in(ledger: &Ledger, account: AccountId, from: NaiveDate, to: NaiveDate) -> Decimal {
let movement: Decimal = ledger
.posted_entries()
.filter(|e| e.date() >= from && e.date() <= to)
.flat_map(|e| e.lines())
.filter(|l| l.account == account)
.map(|l| match l.side {
Side::Debit => l.amount.amount,
Side::Credit => -l.amount.amount,
})
.sum();
let account = ledger.chart().get(account).expect("account exists");
match account.account_type.normal_side() {
Side::Debit => movement,
Side::Credit => -movement,
}
}
/// Today in the books' local time zone. Not UTC: in the evening (US
/// time) UTC is already tomorrow, and "through today" must not include it.
fn today() -> NaiveDate {
chrono::Local::now().date_naive()
}
/// Resolve a statement's date range: `end` defaults to today and `start` to
/// the first posted entry (where "from the beginning" really begins, so no
/// statement says "0001-01-01"), or to `end` for empty books.
fn statement_range(
ledger: &Ledger,
start: Option<&str>,
end: Option<&str>,
) -> Result<(NaiveDate, NaiveDate), String> {
let end = match end {
Some(s) => parse_date(s)?,
None => today(),
};
let start = match start {
Some(s) => parse_date(s)?,
None => ledger
.posted_entries()
.map(|e| e.date())
.min()
.map_or(end, |first| first.min(end)),
};
if end < start {
return Err("end is before start".to_string());
}
Ok((start, end))
}
/// Profit and loss for a range (see [`statement_range`]), optionally one class.
fn pnl_statement(
ledger: &Ledger,
start: Option<&str>,
end: Option<&str>,
class_id: Option<ledger_core::ClassId>,
) -> Result<ledger_core::ProfitAndLossStatement, String> {
let (start, end) = statement_range(ledger, start, end)?;
ledger_core::profit_and_loss_for_period(ledger, start, end, class_id).map_err(|e| e.to_string())
}
/// Balance sheet as of a date (default today).
fn bs_statement(
ledger: &Ledger,
as_of: Option<&str>,
) -> Result<ledger_core::BalanceSheetStatement, String> {
let as_of = match as_of {
Some(s) => parse_date(s)?,
None => today(),
};
ledger_core::balance_sheet_as_of(ledger, as_of).map_err(|e| e.to_string())
}
fn lines_out(lines: &[ledger_core::StatementLine]) -> Vec<StatementLineOut> {
lines
.iter()
.map(|l| StatementLineOut {
code: l.code.clone(),
name: l.name.clone(),
amount: money(l.amount),
})
.collect()
}
// ---------------------------------------------------------------------------
// Tools
// ---------------------------------------------------------------------------
#[tool_router]
impl BooksServer {
#[tool(
name = "books.chart",
description = "List the chart of accounts with current balances. Start here: every line you post must use a real account from this chart.",
annotations(read_only_hint = true)
)]
async fn chart(&self) -> Result<Json<ChartOut>, String> {
let store = self.lock()?;
let ledger = store.ledger();
let mut accounts = Vec::new();
let mut all: Vec<_> = ledger.chart().all().collect();
all.sort_by(|a, b| a.code.cmp(&b.code));
for a in all {
let balance = ledger.account_balance(a.id).map_err(|e| e.to_string())?;
accounts.push(ChartAccount {
id: a.id,
code: a.code.clone(),
name: a.name.clone(),
account_type: format!("{:?}", a.account_type).to_lowercase(),
parent: a.parent,
placeholder: a.placeholder,
balance: money(if balance.is_zero() {
Decimal::ZERO
} else {
balance
}),
});
}
Ok(Json(ChartOut {
accounts,
base_currency: store.base_currency().code().to_string(),
}))
}
#[tool(
name = "books.add_account",
description = "Add an account to the chart. Codes must be unique; check books.chart first."
)]
async fn add_account(
&self,
params: Parameters<AddAccountParams>,
) -> Result<Json<AddAccountOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store
.add_account(
&p.code,
&p.name,
parse_account_type(&p.account_type)?,
p.parent,
p.placeholder.unwrap_or(false),
)
.map_err(|e| e.to_string())?;
Ok(Json(AddAccountOut { account_id: id }))
}
#[tool(
name = "books.trial_balance",
description = "The trial balance as of a date (default today): every account with a non-zero balance, debit and credit columns and totals. Debits must equal credits.",
annotations(read_only_hint = true)
)]
async fn trial_balance(
&self,
params: Parameters<TrialBalanceParams>,
) -> Result<Json<TrialBalanceOut>, String> {
let store = self.lock()?;
let as_of = match &params.0.as_of {
Some(s) => parse_date(s)?,
None => today(),
};
let tb = reports::trial_balance_as_of(store.ledger(), as_of);
Ok(Json(TrialBalanceOut {
as_of: as_of.to_string(),
lines: tb
.lines
.iter()
.map(|l| TrialBalanceLineOut {
code: l.code.clone(),
name: l.name.clone(),
debit: money(l.debit),
credit: money(l.credit),
})
.collect(),
total_debits: money(tb.total_debits),
total_credits: money(tb.total_credits),
balanced: tb.balanced(),
}))
}
#[tool(
name = "books.profit_and_loss",
description = "Profit and loss for a period: revenue, expenses, net income. Dates are YYYY-MM-DD; omit for all time. Pass class (name or id) to filter to one division.",
annotations(read_only_hint = true)
)]
async fn profit_and_loss(
&self,
params: Parameters<ProfitAndLossParams>,
) -> Result<Json<ProfitAndLossOut>, String> {
let p = params.0;
let store = self.lock()?;
let class_id = match &p.class {
Some(c) => Some(resolve_class(&store, c)?),
None => None,
};
let pl = pnl_statement(
store.ledger(),
p.start.as_deref(),
p.end.as_deref(),
class_id,
)?;
Ok(Json(ProfitAndLossOut {
start: pl.start.to_string(),
end: pl.end.to_string(),
revenue: money(pl.total_revenue),
expenses: money(pl.total_expenses),
net_income: money(pl.net_income()),
revenue_accounts: lines_out(&pl.revenue),
expense_accounts: lines_out(&pl.expenses),
}))
}
#[tool(
name = "books.balance_sheet",
description = "The balance sheet as of a date: assets, liabilities, equity (including current earnings). Omit as_of for today.",
annotations(read_only_hint = true)
)]
async fn balance_sheet(
&self,
params: Parameters<BalanceSheetParams>,
) -> Result<Json<BalanceSheetOut>, String> {
let p = params.0;
let store = self.lock()?;
let bs = bs_statement(store.ledger(), p.as_of.as_deref())?;
Ok(Json(BalanceSheetOut {
as_of: bs.as_of.to_string(),
assets: money(bs.total_assets),
liabilities: money(bs.total_liabilities),
equity: money(bs.total_equity),
current_earnings: money(bs.current_earnings),
balanced: bs.balanced(),
asset_accounts: lines_out(&bs.assets),
liability_accounts: lines_out(&bs.liabilities),
equity_accounts: lines_out(&bs.equity),
}))
}
#[tool(
name = "books.cash_flow",
description = "Cash flow statement (indirect method) for a period: net income, depreciation add-back, working-capital changes, investing (asset purchases, disposal proceeds), financing. The three sections reconcile to the net change in the given cash accounts.",
annotations(read_only_hint = true)
)]
async fn cash_flow(
&self,
params: Parameters<CashFlowParams>,
) -> Result<Json<CashFlowOut>, String> {
let p = params.0;
let store = self.lock()?;
let ledger = store.ledger();
let start = match p.start {
Some(s) => parse_date(&s)?,
None => NaiveDate::from_ymd_opt(1, 1, 1).unwrap(),
};
let end = match p.end {
Some(s) => parse_date(&s)?,
None => today(),
};
// Resolve cash and financing account codes to ids.
let mut cash_accounts = Vec::new();
for code in &p.cash_accounts {
let id = ledger
.chart()
.find_by_code(code)
.map(|a| a.id)
.ok_or_else(|| format!("unknown cash account code: {code}"))?;
cash_accounts.push(id);
}
if cash_accounts.is_empty() {
return Err("at least one cash account code is required".to_string());
}
let mut financing_accounts = Vec::new();
for code in &p.financing_accounts {
let id = ledger
.chart()
.find_by_code(code)
.map(|a| a.id)
.ok_or_else(|| format!("unknown financing account code: {code}"))?;
financing_accounts.push(id);
}
let stmt = ledger_core::cash_flow(
ledger,
&ledger_core::CashFlowParams {
start,
end,
cash_accounts,
financing_accounts,
},
)
.map_err(|e| e.to_string())?;
let line = |l: &ledger_core::CashFlowLine| CashFlowLineOut {
label: l.label.clone(),
amount: money(l.amount),
};
Ok(Json(CashFlowOut {
start: stmt.start.to_string(),
end: stmt.end.to_string(),
net_income: money(stmt.net_income),
depreciation: money(stmt.depreciation),
working_capital: stmt.working_capital.iter().map(line).collect(),
cash_from_operations: money(stmt.cash_from_operations),
investing: stmt.investing.iter().map(line).collect(),
cash_from_investing: money(stmt.cash_from_investing),
financing: stmt.financing.iter().map(line).collect(),
cash_from_financing: money(stmt.cash_from_financing),
net_change_in_cash: money(stmt.net_change_in_cash),
cash_beginning: money(stmt.cash_beginning),
cash_ending: money(stmt.cash_ending),
}))
}
#[tool(
name = "books.draft_entry",
description = "Start a draft journal entry. Drafts are journaled and survive restarts, but don't affect reports until posted; add lines with books.add_line."
)]
async fn draft_entry(
&self,
params: Parameters<DraftEntryParams>,
) -> Result<Json<DraftEntryOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store
.create_entry(parse_date(&p.date)?, &p.description)
.map_err(|e| e.to_string())?;
Ok(Json(DraftEntryOut {
entry_id: id,
status: "draft".to_string(),
}))
}
#[tool(
name = "books.add_line",
description = "Add one line to a draft entry. Amount is a decimal string, never a float. The entry must balance before posting. For foreign-currency lines, pass foreign_currency, foreign_amount, and fx_rate (foreign -> base); the base amount is computed as foreign_amount * fx_rate. Pass class (name or id) to tag the line for divisional tracking."
)]
async fn add_line(
&self,
params: Parameters<AddLineParams>,
) -> Result<Json<AddLineOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let account = resolve_account(&store, &p.account)?;
let side = parse_side(&p.side)?;
// Foreign-currency line?
if p.foreign_currency.is_some() || p.foreign_amount.is_some() || p.fx_rate.is_some() {
let fc = p
.foreign_currency
.ok_or("foreign_currency is required for fx lines")?;
let fa = p
.foreign_amount
.ok_or("foreign_amount is required for fx lines")?;
let rate = p.fx_rate.ok_or("fx_rate is required for fx lines")?;
let currency = Currency::new(&fc).map_err(|e| e.to_string())?;
let foreign_amount = parse_amount(&fa)?;
let fx_rate = parse_amount(&rate)?;
store
.add_line_fx(p.entry_id, account, side, currency, foreign_amount, fx_rate)
.map_err(|e| e.to_string())?;
} else {
let amount = parse_amount(&p.amount)?;
if amount <= Decimal::ZERO {
return Err("amount must be positive".to_string());
}
let currency = store.base_currency();
store
.add_line(p.entry_id, account, side, Money::new(amount, currency))
.map_err(|e| e.to_string())?;
}
// Class tag, if requested. The line just added is the last one.
if let Some(class_ref) = p.class {
let class_id = resolve_class(&store, &class_ref)?;
let line_index = store
.ledger()
.get_entry(p.entry_id)
.ok_or_else(|| format!("unknown entry {}", p.entry_id))?
.lines()
.len()
.checked_sub(1)
.ok_or_else(|| "entry has no lines".to_string())?;
store
.set_line_class(p.entry_id, line_index, Some(class_id))
.map_err(|e| e.to_string())?;
}
Ok(Json(AddLineOut { ok: true }))
}
#[tool(
name = "books.post_entry",
description = "Post a draft entry. Without confirmed=true this returns a preview (lines, resulting balances, receipt checklist) and posts nothing. With confirmed=true it posts after enforcing the receipt policy."
)]
async fn post_entry(
&self,
params: Parameters<PostEntryParams>,
) -> Result<Json<PostEntryOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let entry = store
.ledger()
.get_entry(p.entry_id)
.ok_or_else(|| format!("unknown entry {}", p.entry_id))?
.clone();
if entry.status() != ledger_core::EntryStatus::Draft {
return Err(format!("entry {} is not a draft", p.entry_id));
}
// Pure validation before anything is journaled.
entry
.validate(store.ledger().chart())
.map_err(|e| e.to_string())?;
let total = ReceiptPolicy::entry_debits(&entry);
if let Some(expected) = p.expected_total {
let want = parse_amount(&expected)?;
if total != want {
return Err(format!(
"expected_total mismatch: entry totals {total}, expected {want}"
));
}
}
let mut receipt_required = self.policy.receipt_required(store.ledger(), &entry);
let receipts = preview_receipts(&store, p.entry_id)?;
// Anti-splitting: if this entry looks like part of a split group,
// the receipt policy applies to the group total.
let split_group = self.policy.split_group(store.ledger(), p.entry_id, &entry);
if !split_group.is_empty() {
receipt_required = true;
}
let receipt_missing = receipt_required && receipts.is_empty();
let out = PostEntryOut {
status: "preview".to_string(),
entry_id: p.entry_id,
date: entry.date().to_string(),
description: entry.description().to_string(),
total: money(total),
lines: preview_lines(&store, &entry)?,
receipts,
receipt_required,
receipt_missing,
split_detected: split_group.clone(),
};
if !p.confirmed.unwrap_or(false) {
return Ok(Json(out));
}
if receipt_missing {
let split_note = if split_group.is_empty() {
String::new()
} else {
format!(
" Anti-splitting: this looks like part of a split group with entries {:?}; the policy applies to the group total.",
split_group
)
};
return Err(ReceiptRequiredError {
code: "receipt_required".to_string(),
message: format!(
"entry {} moves {} in debits ({}); attach a receipt with books.attach_receipt before posting.{}",
p.entry_id,
money(total),
self.policy.describe(),
split_note
),
entry_id: Some(p.entry_id),
asset_id: None,
debits: total.to_string(),
policy: self.policy.describe(),
remedy_tool: "books.attach_receipt".to_string(),
remedy_hint: format!(
"attach a receipt to entry {} with books.attach_receipt, then retry books.post_entry with confirmed=true",
p.entry_id
),
split_group,
}
.to_tool_error());
}
store.post_entry(p.entry_id).map_err(|e| e.to_string())?;
let mut posted = out;
posted.status = "posted".to_string();
Ok(Json(posted))
}
#[tool(
name = "books.reverse_entry",
description = "Reverse a posted entry with an offsetting entry. Without confirmed=true returns a preview; reversals are exempt from the receipt policy."
)]
async fn reverse_entry(
&self,
params: Parameters<ReverseEntryParams>,
) -> Result<Json<ReverseEntryOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let orig = store
.ledger()
.get_entry(p.entry_id)
.ok_or_else(|| format!("unknown entry {}", p.entry_id))?
.clone();
if orig.status() != ledger_core::EntryStatus::Posted {
return Err(format!("entry {} is not posted", p.entry_id));
}
let date = parse_date(&p.date)?;
// Build the preview from the flipped lines without mutating.
let flipped: Vec<(AccountId, Side, Money)> = orig
.lines()
.iter()
.map(|l| {
let side = match l.side {
Side::Debit => Side::Credit,
Side::Credit => Side::Debit,
};
(l.account, side, l.amount)
})
.collect();
let out = ReverseEntryOut {
status: "preview".to_string(),
reversal_id: 0, // filled in on post
reverses: p.entry_id,
lines: preview_lines_for(&store, &flipped)?,
};
if !p.confirmed.unwrap_or(false) {
return Ok(Json(out));
}
let reversal_id = store
.reverse_entry(p.entry_id, date, &p.description)
.map_err(|e| e.to_string())?;
let mut posted = out;
posted.status = "posted".to_string();
posted.reversal_id = reversal_id;
Ok(Json(posted))
}
#[tool(
name = "books.attach_receipt",
description = "Attach a receipt (base64 file bytes) to an entry, or file it unlinked and link later with books.link_receipt. Files are content-addressed and deduplicated."
)]
async fn attach_receipt(
&self,
params: Parameters<AttachReceiptParams>,
) -> Result<Json<AttachReceiptOut>, String> {
let p = params.0;
let bytes = base64::Engine::decode(
&base64::engine::general_purpose::STANDARD,
&p.content_base64,
)
.map_err(|_| "content_base64 is not valid base64".to_string())?;
if bytes.len() > MAX_UPLOAD_BYTES {
return Err(format!(
"file is {} bytes; the limit is {MAX_UPLOAD_BYTES}",
bytes.len()
));
}
let mut store = self.lock()?;
let (attachment_id, sha256, deduplicated) = store
.attach_receipt(
p.entry_id,
&p.file_name,
&p.mime_type,
&bytes,
p.description.as_deref(),
)
.map_err(|e| e.to_string())?;
Ok(Json(AttachReceiptOut {
attachment_id,
sha256,
deduplicated,
}))
}
#[tool(
name = "books.file_document",
description = "File a formation, legal, tax, or accounting document into the content-addressed store."
)]
async fn file_document(
&self,
params: Parameters<FileDocumentParams>,
) -> Result<Json<AttachReceiptOut>, String> {
let p = params.0;
match p.category.as_str() {
"formation" | "legal" | "tax" | "accounting" | "other" => {}
_ => {
return Err(format!(
"bad category {:?}: expected formation, legal, tax, accounting, or other",
p.category
));
}
}
let bytes = base64::Engine::decode(
&base64::engine::general_purpose::STANDARD,
&p.content_base64,
)
.map_err(|_| "content_base64 is not valid base64".to_string())?;
if bytes.len() > MAX_UPLOAD_BYTES {
return Err(format!(
"file is {} bytes; the limit is {MAX_UPLOAD_BYTES}",
bytes.len()
));
}
let mut store = self.lock()?;
let (attachment_id, sha256, deduplicated) = store
.file_document(
&p.category,
&p.file_name,
&p.mime_type,
&bytes,
p.description.as_deref(),
)
.map_err(|e| e.to_string())?;
Ok(Json(AttachReceiptOut {
attachment_id,
sha256,
deduplicated,
}))
}
#[tool(
name = "books.link_receipt",
description = "Link a previously filed (unlinked) receipt to an entry."
)]
async fn link_receipt(
&self,
params: Parameters<LinkReceiptParams>,
) -> Result<Json<LinkReceiptOut>, String> {
let p = params.0;
let mut store = self.lock()?;
store
.link_receipt(p.attachment_id, p.entry_id)
.map_err(|e| e.to_string())?;
Ok(Json(LinkReceiptOut { ok: true }))
}
#[tool(
name = "books.unlink_receipt",
description = "Detach a receipt from its entry, with a reason recorded in the journal. The receipt stays filed (unlinked); link it elsewhere or withdraw it with books.withdraw_attachment. The receipt policy still holds: an entry that requires a receipt cannot be left with none, so to replace a receipt attach the new one first, then unlink the old."
)]
async fn unlink_receipt(
&self,
params: Parameters<UnlinkReceiptParams>,
) -> Result<Json<UnlinkReceiptOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let attachment = store
.list_attachments(None)
.map_err(|e| e.to_string())?
.into_iter()
.find(|a| a.id == p.attachment_id)
.ok_or_else(|| format!("unknown attachment {}", p.attachment_id))?;
if let Some(entry_id) = attachment.entry_id {
let remaining = store
.list_attachments(Some(entry_id))
.map_err(|e| e.to_string())?
.len()
- 1;
if remaining == 0 {
self.ensure_receipt_not_required(&store, entry_id)?;
}
}
let entry_id = store
.unlink_receipt(p.attachment_id, &p.reason)
.map_err(|e| e.to_string())?;
let remaining_receipts = store
.list_attachments(Some(entry_id))
.map_err(|e| e.to_string())?
.len() as u64;
Ok(Json(UnlinkReceiptOut {
ok: true,
entry_id,
remaining_receipts,
}))
}
#[tool(
name = "books.withdraw_attachment",
description = "Withdraw an unlinked receipt or a filed document, with a reason recorded in the journal. It drops out of books.list_receipts and can never be linked again. Nothing is deleted: the bytes stay in the blob store and the journal keeps the filing and the withdrawal. Unlink a linked receipt first."
)]
async fn withdraw_attachment(
&self,
params: Parameters<WithdrawAttachmentParams>,
) -> Result<Json<WithdrawAttachmentOut>, String> {
let p = params.0;
let mut store = self.lock()?;
store
.withdraw_attachment(p.attachment_id, &p.reason)
.map_err(|e| e.to_string())?;
Ok(Json(WithdrawAttachmentOut { ok: true }))
}
#[tool(
name = "books.list_receipts",
description = "List receipts and filed documents, optionally filtered to one entry. Withdrawn attachments are hidden unless include_withdrawn=true.",
annotations(read_only_hint = true)
)]
async fn list_receipts(
&self,
params: Parameters<ListReceiptsParams>,
) -> Result<Json<ListReceiptsOut>, String> {
let p = params.0;
let store = self.lock()?;
let include_withdrawn = p.include_withdrawn.unwrap_or(false);
let receipts = store
.list_attachments(p.entry_id)
.map_err(|e| e.to_string())?
.into_iter()
.filter(|a| include_withdrawn || a.withdrawn_at.is_none())
.map(|a| ReceiptOut {
attachment_id: a.id,
sha256: a.blob_sha,
entry_id: a.entry_id,
category: a.category,
file_name: a.file_name,
mime_type: a.mime_type,
size_bytes: a.size_bytes,
description: a.description,
withdrawn: a.withdrawn_at.is_some(),
withdrawn_reason: a.withdrawn_reason,
})
.collect();
Ok(Json(ListReceiptsOut { receipts }))
}
#[tool(
name = "books.get_receipt",
description = "Fetch a receipt or document's metadata and base64 bytes. Bytes are hash-verified on read.",
annotations(read_only_hint = true)
)]
async fn get_receipt(
&self,
params: Parameters<GetReceiptParams>,
) -> Result<Json<GetReceiptOut>, String> {
let p = params.0;
let store = self.lock()?;
let meta = store
.list_attachments(None)
.map_err(|e| e.to_string())?
.into_iter()
.find(|a| a.id == p.attachment_id)
.ok_or_else(|| format!("unknown attachment {}", p.attachment_id))?;
let bytes = store
.attachment_bytes(p.attachment_id)
.map_err(|e| e.to_string())?;
Ok(Json(GetReceiptOut {
attachment_id: meta.id,
sha256: meta.blob_sha,
entry_id: meta.entry_id,
category: meta.category,
file_name: meta.file_name,
mime_type: meta.mime_type,
size_bytes: meta.size_bytes,
content_base64: base64::Engine::encode(
&base64::engine::general_purpose::STANDARD,
&bytes,
),
}))
}
#[tool(
name = "books.get_entry",
description = "Full detail of one entry: lines, totals, status, and attached receipts.",
annotations(read_only_hint = true)
)]
async fn get_entry(
&self,
params: Parameters<GetEntryParams>,
) -> Result<Json<GetEntryOut>, String> {
let p = params.0;
let store = self.lock()?;
let entry = store
.ledger()
.get_entry(p.entry_id)
.ok_or_else(|| format!("unknown entry {}", p.entry_id))?
.clone();
let lines = entry
.lines()
.iter()
.map(|l| {
let a = store.ledger().chart().get(l.account).unwrap();
EntryLineOut {
account_id: l.account,
code: a.code.clone(),
name: a.name.clone(),
side: match l.side {
Side::Debit => "debit".to_string(),
Side::Credit => "credit".to_string(),
},
amount: money(l.amount.amount),
}
})
.collect();
Ok(Json(GetEntryOut {
entry_id: p.entry_id,
date: entry.date().to_string(),
description: entry.description().to_string(),
status: match entry.status() {
ledger_core::EntryStatus::Draft => "draft".to_string(),
ledger_core::EntryStatus::Posted => "posted".to_string(),
},
reversal_of: entry.reversal_of(),
lines,
total: money(ReceiptPolicy::entry_debits(&entry)),
receipts: preview_receipts(&store, p.entry_id)?,
}))
}
#[tool(
name = "books.search_entries",
description = "Search posted entries by account, date range, and description text. Newest first.",
annotations(read_only_hint = true)
)]
async fn search_entries(
&self,
params: Parameters<SearchEntriesParams>,
) -> Result<Json<SearchEntriesOut>, String> {
let p = params.0;
let store = self.lock()?;
let rows = store
.search_entries(
p.account_id,
p.date_from.as_deref(),
p.date_to.as_deref(),
p.text.as_deref(),
p.limit.unwrap_or(50).min(500),
p.offset.unwrap_or(0),
)
.map_err(|e| e.to_string())?;
let mut entries = Vec::with_capacity(rows.len());
for r in rows {
let e = store
.ledger()
.get_entry(r.id)
.ok_or_else(|| format!("entry {} missing from ledger", r.id))?;
let total = ReceiptPolicy::entry_debits(e);
let receipt_count = store
.list_attachments(Some(r.id))
.map_err(|e| e.to_string())?
.len() as u64;
entries.push(EntrySummary {
entry_id: r.id,
date: r.date,
description: r.description,
total: money(total),
reversal_of: r.reversal_of,
receipt_count,
});
}
Ok(Json(SearchEntriesOut { entries }))
}
#[tool(
name = "books.digest",
description = "What changed since a date: entries posted, per-account movement, and receipt coverage. Built for human review.",
annotations(read_only_hint = true)
)]
async fn digest(&self, params: Parameters<DigestParams>) -> Result<Json<DigestOut>, String> {
let p = params.0;
let since = parse_date(&p.since)?;
let today = today();
let store = self.lock()?;
let ledger = store.ledger();
let mut entries = Vec::new();
for e in ledger.posted_entries() {
if e.date() < since {
continue;
}
let receipts = store
.list_attachments(Some(e.id()))
.map_err(|e| e.to_string())?;
let required = self.policy.receipt_required(ledger, e);
entries.push(DigestEntry {
entry_id: e.id(),
date: e.date().to_string(),
description: e.description().to_string(),
total: money(ReceiptPolicy::entry_debits(e)),
reversal_of: e.reversal_of(),
receipt_count: receipts.len() as u64,
receipt_required: required,
receipt_missing: required && receipts.is_empty(),
});
}
entries.sort_by(|a, b| b.date.cmp(&a.date).then(b.entry_id.cmp(&a.entry_id)));
let mut totals = Vec::new();
for a in ledger.chart().all() {
if a.placeholder {
continue;
}
let m = movement_in(ledger, a.id, since, today);
if !m.is_zero() {
totals.push(DigestTotal {
code: a.code.clone(),
name: a.name.clone(),
movement: money(m),
});
}
}
totals.sort_by(|a, b| a.code.cmp(&b.code));
Ok(Json(DigestOut {
since: since.to_string(),
entries,
totals_by_account: totals,
}))
}
#[tool(
name = "books.import_bank_csv",
description = "Import a QuickBooks-style bank/credit-card CSV (Date,Description,Amount or Date,Description,Expense,Income). Creates one DRAFT entry per transaction: bank account on one side, categorized offset on the other (via rules or default_offset_code). Review with books.digest, then post."
)]
async fn import_bank_csv(
&self,
params: Parameters<ImportBankCsvParams>,
) -> Result<Json<ImportBankCsvOut>, String> {
let p = params.0;
let txns = ledger_import::parse_bank_csv(&p.csv_text).map_err(|e| e.to_string())?;
let mut store = self.lock()?;
let bank = store
.ledger()
.chart()
.find_by_code(&p.bank_account_code)
.map(|a| (a.id, a.code.clone()))
.ok_or_else(|| format!("unknown bank account code: {}", p.bank_account_code))?;
let default_offset = store
.ledger()
.chart()
.find_by_code(&p.default_offset_code)
.map(|a| (a.id, a.code.clone()))
.ok_or_else(|| format!("unknown offset account code: {}", p.default_offset_code))?;
// Resolve rule account codes upfront.
let mut rules: Vec<(String, (ledger_core::AccountId, String))> = Vec::new();
for (pattern, code) in &p.rules {
let (id, c) = store
.ledger()
.chart()
.find_by_code(code)
.map(|a| (a.id, a.code.clone()))
.ok_or_else(|| format!("unknown rule account code: {code}"))?;
rules.push((pattern.to_lowercase(), (id, c)));
}
let mut imported = Vec::new();
for txn in txns {
let desc_lower = txn.description.to_lowercase();
let (offset_id, offset_code) = rules
.iter()
.find(|(pat, _)| desc_lower.contains(pat))
.map(|(_, v)| v.clone())
.unwrap_or_else(|| default_offset.clone());
let amount = Money::new(txn.amount.abs(), store.ledger().base_currency());
let entry_id = store
.create_entry(txn.date, &format!("Bank import — {}", txn.description))
.map_err(|e| e.to_string())?;
// Money in: debit bank, credit offset. Money out: reverse.
let (bank_side, offset_side) = if txn.amount > Decimal::ZERO {
(Side::Debit, Side::Credit)
} else {
(Side::Credit, Side::Debit)
};
store
.add_line(entry_id, bank.0, bank_side, amount)
.map_err(|e| e.to_string())?;
store
.add_line(entry_id, offset_id, offset_side, amount)
.map_err(|e| e.to_string())?;
imported.push(ImportedTxnOut {
entry_id,
date: txn.date.to_string(),
description: txn.description.clone(),
amount: money(txn.amount),
offset_account: offset_code,
});
}
let count = imported.len();
Ok(Json(ImportBankCsvOut { imported, count }))
}
#[tool(
name = "books.import_chart_csv",
description = "Import a chart of accounts from CSV (header: code,name,type,parent_code). Types: asset, liability, equity, revenue, expense. Parents must come before children. Fails on the first bad row; nothing is half-imported."
)]
async fn import_chart_csv(
&self,
params: Parameters<ImportChartCsvParams>,
) -> Result<Json<ImportChartCsvOut>, String> {
let p = params.0;
let rows = ledger_import::parse_chart_csv(&p.csv_text).map_err(|e| e.to_string())?;
let mut store = self.lock()?;
// Validate all rows first: nothing is half-imported.
for row in &rows {
if store.ledger().chart().find_by_code(&row.code).is_some() {
return Err(format!("duplicate account code: {}", row.code));
}
}
let mut created = Vec::new();
for row in rows {
let account_type = match row.account_type.as_str() {
"asset" => AccountType::Asset,
"liability" => AccountType::Liability,
"equity" => AccountType::Equity,
"revenue" => AccountType::Revenue,
"expense" => AccountType::Expense,
_ => return Err(format!("bad account type: {}", row.account_type)),
};
let parent = match &row.parent_code {
Some(code) => Some(
store
.ledger()
.chart()
.find_by_code(code)
.map(|a| a.id)
.ok_or_else(|| format!("unknown parent code: {code}"))?,
),
None => None,
};
store
.add_account(&row.code, &row.name, account_type, parent, false)
.map_err(|e| e.to_string())?;
created.push(row.code.clone());
}
let count = created.len();
Ok(Json(ImportChartCsvOut { created, count }))
}
#[tool(
name = "books.import_local_file",
description = "Import a file from the server's local filesystem into the blob store (receipt or document). Used for backfills: the agent downloads from Google Drive (or elsewhere) to a temp path, then calls this. Path must be absolute."
)]
async fn import_local_file(
&self,
params: Parameters<ImportLocalFileParams>,
) -> Result<Json<ImportLocalFileOut>, String> {
let p = params.0;
let path = std::path::Path::new(&p.path);
if !path.is_absolute() {
return Err("path must be absolute".to_string());
}
let bytes = std::fs::read(path).map_err(|e| format!("read {}: {e}", p.path))?;
if bytes.len() > 25 * 1024 * 1024 {
return Err("file exceeds 25 MB limit".to_string());
}
let file_name = p.file_name.unwrap_or_else(|| {
path.file_name()
.and_then(|n| n.to_str())
.unwrap_or("file")
.to_string()
});
let mime_type = mime_guess::from_path(path)
.first_or_octet_stream()
.to_string();
let mut store = self.lock()?;
let (attachment_id, sha256, deduplicated) = match p.category.as_str() {
"receipt" => store
.attach_receipt(
p.entry_id,
&file_name,
&mime_type,
&bytes,
p.description.as_deref(),
)
.map_err(|e| e.to_string())?,
"document" => {
let cat = p.document_category.as_deref().unwrap_or("other");
store
.file_document(
cat,
&file_name,
&mime_type,
&bytes,
p.description.as_deref(),
)
.map_err(|e| e.to_string())?
}
_ => return Err("category must be \"receipt\" or \"document\"".to_string()),
};
Ok(Json(ImportLocalFileOut {
attachment_id,
sha256,
deduplicated,
file_name,
}))
}
#[tool(
name = "books.export",
description = "Export a report. Reports: profit_and_loss, balance_sheet, cash_flow (needs cash_accounts), trial_balance (as_of), members_equity (multi-member LLC; members from wanderbooks.toml), general_ledger (by account: running balances, splits), general_journal (every entry in date order; alias journal). Formats: pdf and xlsx (base64) for the five statements; xlsx, csv, json for every report; iif for general_journal (QuickBooks Desktop). Dates: start/end for period reports (start defaults to the first entry, end to today), as_of for balance_sheet and trial_balance.",
annotations(read_only_hint = true)
)]
async fn export(&self, params: Parameters<ExportParams>) -> Result<Json<ExportOut>, String> {
let p = params.0;
let format = p.format.to_lowercase();
if !["csv", "json", "xlsx", "pdf", "iif"].contains(&format.as_str()) {
return Err(format!(
"bad format {:?}: expected \"csv\", \"json\", \"xlsx\", \"pdf\", or \"iif\"",
p.format
));
}
let report = p.report.to_lowercase();
if format == "iif" && report != "journal" {
return Err("iif format is only valid for the journal report".to_string());
}
if format == "xlsx" || format == "pdf" {
let bytes = if format == "xlsx" {
self.export_xlsx(&report, &p)?
} else {
self.export_pdf(&report, &p)?
};
return Ok(Json(ExportOut {
format,
report,
content: base64::Engine::encode(&base64::engine::general_purpose::STANDARD, &bytes),
content_encoding: Some("base64".to_string()),
}));
}
if format == "iif" {
let content = self.export_iif()?;
return Ok(Json(ExportOut {
format,
report,
content,
content_encoding: None,
}));
}
let content = match report.as_str() {
"journal" | "general_journal" => self.export_journal(&format)?,
"trial_balance" => self.export_trial_balance(&format, p.as_of.as_deref())?,
"general_ledger" => self.export_general_ledger(&format, &p)?,
"members_equity" => self.export_members_equity(&format, &p)?,
"profit_and_loss" => self.export_pnl(&format, p.start.as_deref(), p.end.as_deref())?,
"balance_sheet" => self.export_balance_sheet(&format, p.as_of.as_deref())?,
"cash_flow" => self.export_cash_flow(&format, &p)?,
_ => {
return Err(format!(
"bad report {:?}: expected general_journal, general_ledger, trial_balance, profit_and_loss, balance_sheet, cash_flow, or members_equity",
p.report
));
}
};
Ok(Json(ExportOut {
format,
report,
content,
content_encoding: None,
}))
}
/// Lay out a financial statement for rendering, from export params.
fn layout_statement(
&self,
ledger: &Ledger,
report: &str,
p: &ExportParams,
) -> Result<ledger_import::Statement, String> {
use ledger_import::report;
let members = self.report_members();
Ok(match report {
"profit_and_loss" => report::profit_and_loss(&pnl_statement(
ledger,
p.start.as_deref(),
p.end.as_deref(),
None,
)?),
"balance_sheet" => {
let bs = bs_statement(ledger, p.as_of.as_deref())?;
let earnings = self.year_earnings(ledger, bs.as_of)?;
report::balance_sheet(&bs, earnings, &members)
}
"cash_flow" => report::cash_flow(
&cash_flow_statement(
ledger,
p.start.as_deref(),
p.end.as_deref(),
&p.cash_accounts,
&p.financing_accounts,
)?,
&members,
),
"trial_balance" => {
let as_of = match &p.as_of {
Some(s) => parse_date(s)?,
None => today(),
};
report::trial_balance(&reports::trial_balance_as_of(ledger, as_of), as_of)
}
"members_equity" => {
let (start, end) = statement_range(ledger, p.start.as_deref(), p.end.as_deref())?;
let me =
ledger_core::members_equity(ledger, start, end, &self.member_capitals(ledger)?)
.map_err(|e| e.to_string())?;
report::members_equity(&me)
}
_ => {
return Err(format!(
"bad report {report:?}: expected profit_and_loss, balance_sheet, cash_flow, trial_balance, or members_equity"
));
}
})
}
/// Render a report to XLSX bytes via ledger-import.
fn export_xlsx(&self, report: &str, p: &ExportParams) -> Result<Vec<u8>, String> {
use ledger_import::{XlsxReport, report_to_xlsx};
let store = self.lock()?;
let meta = self.report_meta(&store);
let ledger = store.ledger();
let xlsx = |r: XlsxReport<'_>| report_to_xlsx(&r, &meta).map_err(|e| e.to_string());
match report {
"general_ledger" => {
let (start, end) = statement_range(ledger, p.start.as_deref(), p.end.as_deref())?;
let gl =
ledger_core::general_ledger(ledger, start, end).map_err(|e| e.to_string())?;
xlsx(XlsxReport::GeneralLedger(&gl))
}
"general_journal" | "journal" => {
let (start, end) = statement_range(ledger, p.start.as_deref(), p.end.as_deref())?;
xlsx(XlsxReport::GeneralJournal(ledger, start, end))
}
_ => xlsx(XlsxReport::Statement(
&self.layout_statement(ledger, report, p)?,
)),
}
}
/// Render a financial statement to PDF bytes via ledger-import.
fn export_pdf(&self, report: &str, p: &ExportParams) -> Result<Vec<u8>, String> {
if matches!(report, "general_ledger" | "general_journal" | "journal") {
return Err(format!("{report} exports as xlsx, csv, or json, not pdf"));
}
let store = self.lock()?;
let meta = self.report_meta(&store);
let st = self.layout_statement(store.ledger(), report, p)?;
ledger_import::statement_pdf(&st, &meta).map_err(|e| e.to_string())
}
/// Render the journal as IIF text via ledger-import.
fn export_iif(&self) -> Result<String, String> {
use ledger_import::{IifEntry, journal_to_iif};
let store = self.lock()?;
let ledger = store.ledger();
let account_names = |id: ledger_core::AccountId| {
ledger
.chart()
.get(id)
.map(|a| a.name.clone())
.unwrap_or_default()
};
let entries: Vec<IifEntry<'_>> = ledger
.posted_entries()
.map(|e| IifEntry {
entry: e,
account_names: &account_names,
})
.collect();
Ok(journal_to_iif(&entries))
}
// ------------------------------------------------------------------
// Fixed assets
// ------------------------------------------------------------------
#[tool(
name = "books.register_asset",
description = "Register a fixed asset (equipment, vehicles, buildings). Links three accounts: cost (asset), accumulated depreciation (asset, contra), depreciation expense. Depreciation is straight-line, book basis only — tax depreciation (MACRS, Section 179) stays with the CPA."
)]
async fn register_asset(
&self,
params: Parameters<RegisterAssetParams>,
) -> Result<Json<RegisterAssetOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let base = store.ledger().base_currency();
let cost_account = resolve_account(&store, &p.cost_account)?;
let accum_depr_account = resolve_account(&store, &p.accum_depr_account)?;
let expense_account = resolve_account(&store, &p.expense_account)?;
let asset_id = store
.register_asset(NewAsset {
description: p.description,
purchase_date: parse_date(&p.purchase_date)?,
cost: Money::new(parse_amount(&p.cost)?, base),
salvage_value: Money::new(
parse_amount(p.salvage_value.as_deref().unwrap_or("0"))?,
base,
),
useful_life_months: p.useful_life_months,
cost_account,
accum_depr_account,
expense_account,
})
.map_err(|e| e.to_string())?;
Ok(Json(RegisterAssetOut { asset_id }))
}
#[tool(
name = "books.asset_schedule",
description = "Month-by-month straight-line depreciation schedule for an asset: period, amount, accumulated, book value. Partial first and last months are prorated by days; the lifetime total is exactly cost minus salvage.",
annotations(read_only_hint = true)
)]
async fn asset_schedule(
&self,
params: Parameters<AssetScheduleParams>,
) -> Result<Json<AssetScheduleOut>, String> {
let p = params.0;
let store = self.lock()?;
let asset = store
.ledger()
.get_asset(p.asset_id)
.ok_or_else(|| format!("unknown asset {}", p.asset_id))?
.clone();
// The schedule clamps to the depreciation end internally, so an
// unbounded default just means "the whole life".
let through = match p.through {
Some(t) => parse_date(&t)?,
None => NaiveDate::MAX,
};
let schedule = depreciation_schedule(&asset, through)
.into_iter()
.map(|l| ScheduleLineOut {
period: l.period,
amount: money(l.amount),
accumulated: money(l.accumulated),
book_value: money(l.book_value),
})
.collect();
Ok(Json(AssetScheduleOut {
asset_id: asset.id,
description: asset.description.clone(),
cost: money(asset.cost.amount),
salvage_value: money(asset.salvage_value.amount),
useful_life_months: asset.useful_life_months,
status: match asset.status {
AssetStatus::Active => "active".to_string(),
AssetStatus::Disposed { .. } => "disposed".to_string(),
},
schedule,
}))
}
#[tool(
name = "books.list_assets",
description = "List all registered fixed assets with accumulated depreciation and book value as of today.",
annotations(read_only_hint = true)
)]
async fn list_assets(&self) -> Result<Json<ListAssetsOut>, String> {
let store = self.lock()?;
let today = today();
let assets = store
.ledger()
.registered_assets()
.map(|a| AssetSummary {
asset_id: a.id,
description: a.description.clone(),
purchase_date: a.purchase_date.to_string(),
cost: money(a.cost.amount),
useful_life_months: a.useful_life_months,
status: match a.status {
AssetStatus::Active => "active".to_string(),
AssetStatus::Disposed { .. } => "disposed".to_string(),
},
accumulated: money(accumulated_depreciation(a, today)),
book_value: money(book_value(a, today)),
})
.collect();
Ok(Json(ListAssetsOut { assets }))
}
#[tool(
name = "books.run_depreciation",
description = "Post one month of depreciation (Dr Depreciation Expense / Cr Accumulated Depreciation) for one asset, or for every active asset when asset_id is omitted. Idempotent: re-running a posted period returns the original entry instead of double-posting. Depreciation is an allocation, not money movement, so it is exempt from the receipt policy; the registered asset and its schedule are the evidence."
)]
async fn run_depreciation(
&self,
params: Parameters<RunDepreciationParams>,
) -> Result<Json<RunDepreciationOut>, String> {
let p = params.0;
let (py, pm) = parse_period_mcp(&p.period)?;
let mut store = self.lock()?;
let targets: Vec<(u64, String)> = match p.asset_id {
Some(id) => {
let a = store
.ledger()
.get_asset(id)
.ok_or_else(|| format!("unknown asset {id}"))?;
vec![(id, a.description.clone())]
}
None => store
.ledger()
.registered_assets()
.filter(|a| a.status == AssetStatus::Active)
.map(|a| (a.id, a.description.clone()))
.collect(),
};
let mut runs = Vec::with_capacity(targets.len());
let mut skipped = Vec::new();
for (id, description) in targets {
// Run-all skips assets whose depreciable life doesn't touch the
// period instead of failing the whole batch.
if p.asset_id.is_none()
&& let Some(asset) = store.ledger().get_asset(id)
{
let period_end = last_day_of_month(py, pm);
let touches = depreciation_schedule(asset, period_end)
.iter()
.any(|l| l.period == p.period);
if !touches {
skipped.push(SkippedDepreciation {
asset_id: id,
description,
reason: format!(
"period {} is outside the asset's depreciable life",
p.period
),
});
continue;
}
}
let r = store
.run_depreciation(id, &p.period)
.map_err(|e| e.to_string())?;
runs.push(DepreciationRunOut {
asset_id: r.asset_id,
description,
period: r.period,
amount: money(r.amount),
entry_id: r.entry_id,
already_posted: r.already_posted,
});
}
Ok(Json(RunDepreciationOut { runs, skipped }))
}
#[tool(
name = "books.dispose_asset",
description = "Dispose of a fixed asset (sell or retire). Without confirmed=true returns a preview — book value, gain/loss, the auto-posted final depreciation, and the disposal entry's lines — and posts nothing. With confirmed=true posts the disposal entry (plus any missing final-period depreciation) after enforcing the receipt policy: file the bill of sale with books.file_document first and pass its attachment ids as receipt_attachment_ids."
)]
async fn dispose_asset(
&self,
params: Parameters<DisposeAssetParams>,
) -> Result<Json<DisposeAssetOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let date = parse_date(&p.date)?;
let base = store.ledger().base_currency();
let proceeds = Money::new(parse_amount(&p.proceeds)?, base);
let proceeds_account = resolve_account(&store, &p.proceeds_account)?;
let gain_loss_account = resolve_account(&store, &p.gain_loss_account)?;
let asset = store
.ledger()
.get_asset(p.asset_id)
.ok_or_else(|| format!("unknown asset {}", p.asset_id))?
.clone();
let preview = store
.dispose_preview(p.asset_id, date, proceeds)
.map_err(|e| e.to_string())?;
// The would-be disposal entry's lines, for the preview and the
// receipt-policy check.
let mut raw: Vec<(AccountId, Side, Money)> = vec![
(
asset.accum_depr_account,
Side::Debit,
Money::new(preview.accumulated, base),
),
(proceeds_account, Side::Debit, proceeds),
(asset.cost_account, Side::Credit, asset.cost),
];
if preview.gain_loss > Decimal::ZERO {
raw.push((
gain_loss_account,
Side::Credit,
Money::new(preview.gain_loss, base),
));
} else if preview.gain_loss < Decimal::ZERO {
raw.push((
gain_loss_account,
Side::Debit,
Money::new(-preview.gain_loss, base),
));
}
// Disposals are money movement: the bill of sale is the receipt.
let chart = store.ledger().chart();
let code_of = |id: AccountId| {
chart
.get(id)
.map(|a| a.code.clone())
.ok_or_else(|| format!("unknown account {id}"))
};
let codes: Vec<String> = [
asset.accum_depr_account,
proceeds_account,
asset.cost_account,
gain_loss_account,
]
.iter()
.map(|id| code_of(*id))
.collect::<Result<_, _>>()?;
let code_refs: Vec<&str> = codes.iter().map(|s| s.as_str()).collect();
let debits = preview.accumulated
+ proceeds.amount
+ if preview.gain_loss < Decimal::ZERO {
-preview.gain_loss
} else {
Decimal::ZERO
};
let receipt_required = self.policy.receipt_required_for(&code_refs, debits);
let out = DisposeAssetOut {
status: "preview".to_string(),
asset_id: p.asset_id,
entry_id: 0,
accumulated: money(preview.accumulated),
book_value: money(preview.book_value),
proceeds: money(proceeds.amount),
gain_loss: money(preview.gain_loss),
final_depreciation: money(preview.final_depreciation),
lines: preview_lines_for(&store, &raw)?,
receipt_required,
};
if !p.confirmed.unwrap_or(false) {
return Ok(Json(out));
}
let attachment_ids = p.receipt_attachment_ids.unwrap_or_default();
if receipt_required && attachment_ids.is_empty() {
return Err(ReceiptRequiredError {
code: "receipt_required".to_string(),
message: format!(
"disposing {} moves {} in debits ({}); file the bill of sale with books.file_document, then retry with receipt_attachment_ids",
asset.description,
money(debits),
self.policy.describe()
),
entry_id: None,
asset_id: Some(p.asset_id),
debits: debits.to_string(),
policy: self.policy.describe(),
remedy_tool: "books.file_document".to_string(),
remedy_hint:
"file the bill of sale with books.file_document, then retry books.dispose_asset with confirmed=true and receipt_attachment_ids=[<id>]"
.to_string(),
split_group: Vec::new(),
}
.to_tool_error());
}
for aid in &attachment_ids {
store.check_linkable(*aid).map_err(|e| e.to_string())?;
}
let entry_id = store
.dispose_asset(
p.asset_id,
date,
proceeds,
proceeds_account,
gain_loss_account,
)
.map_err(|e| e.to_string())?;
for aid in &attachment_ids {
store
.link_receipt(*aid, entry_id)
.map_err(|e| e.to_string())?;
}
let mut posted = out;
posted.status = "posted".to_string();
posted.entry_id = entry_id;
Ok(Json(posted))
}
// ------------------------------------------------------------------
// Periods
// ------------------------------------------------------------------
#[tool(
name = "books.create_period",
description = "Create an accounting period (month, quarter, year). Dates are YYYY-MM-DD, inclusive."
)]
async fn create_period(
&self,
params: Parameters<CreatePeriodParams>,
) -> Result<Json<CreatePeriodOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store
.create_period(&p.name, parse_date(&p.start)?, parse_date(&p.end)?)
.map_err(|e| e.to_string())?;
Ok(Json(CreatePeriodOut { period_id: id }))
}
#[tool(
name = "books.close_period",
description = "Close an accounting period. The closing entry, dated at period end, zeroes revenue and expense balances as of that date into Retained Earnings, or, for a multi-member LLC (members in wanderbooks.toml), into each member's capital account by share. Periods close in order. Without confirmed=true, returns the exact closing entry it would post and closes nothing. With confirmed=true, posts it and marks the period closed. Closed periods reject new entries."
)]
async fn close_period(
&self,
params: Parameters<ClosePeriodParams>,
) -> Result<Json<ClosePeriodOut>, String> {
let p = params.0;
let mut store = self.lock()?;
// Verify the period exists.
if store.ledger().get_period(p.period_id).is_none() {
return Err(format!("unknown period {}", p.period_id));
}
// A partnership closes into its members' capital accounts by share;
// everyone else into Retained Earnings.
let to = if self.company.members.is_empty() {
ledger_core::CloseTo::RetainedEarnings
} else {
ledger_core::CloseTo::Members(
self.member_capitals(store.ledger())?
.into_iter()
.map(|m| (m.capital_account, m.share))
.collect(),
)
};
let describe = |ledger: &Ledger, eid: Option<ledger_core::EntryId>| -> Vec<String> {
let Some(entry) = eid.and_then(|e| ledger.get_entry(e)) else {
return Vec::new();
};
entry
.lines()
.iter()
.map(|line| {
let code = ledger
.chart()
.get(line.account)
.map(|a| a.code.clone())
.unwrap_or_default();
format!("{:?} {} {}", line.side, code, money(line.amount.amount))
})
.collect()
};
if !p.confirmed {
// Preview: run the real close on a copy of the ledger, so the
// preview is exactly what confirming would post.
let mut scratch = store.ledger().clone();
let closing = scratch
.close_period_to(p.period_id, &to)
.map_err(|e| e.to_string())?;
return Ok(Json(ClosePeriodOut {
status: "preview".to_string(),
period_id: p.period_id,
closing_entry: None,
lines: describe(&scratch, closing),
}));
}
let closing = store
.close_period_to(p.period_id, &to)
.map_err(|e| e.to_string())?;
let lines = describe(store.ledger(), closing);
Ok(Json(ClosePeriodOut {
status: "closed".to_string(),
period_id: p.period_id,
closing_entry: closing,
lines,
}))
}
#[tool(
name = "books.list_periods",
description = "List all accounting periods with their status."
)]
async fn list_periods(&self) -> Result<Json<ListPeriodsOut>, String> {
let store = self.lock()?;
let periods = store
.ledger()
.list_periods()
.into_iter()
.map(|p| PeriodOut {
id: p.id,
name: p.name.clone(),
start: p.start.to_string(),
end: p.end.to_string(),
status: match p.status {
PeriodStatus::Open => "open".to_string(),
PeriodStatus::Closed => "closed".to_string(),
},
closing_entry: p.closing_entry,
})
.collect();
Ok(Json(ListPeriodsOut { periods }))
}
// ------------------------------------------------------------------
// Bank reconciliation
// ------------------------------------------------------------------
#[tool(
name = "books.mark_cleared",
description = "Mark a posted entry's line as cleared (or uncleared) for bank reconciliation. Only posted lines can be marked."
)]
async fn mark_cleared(
&self,
params: Parameters<MarkClearedParams>,
) -> Result<Json<MarkClearedOut>, String> {
let p = params.0;
let mut store = self.lock()?;
store
.mark_cleared(p.entry_id, p.line_index, p.cleared)
.map_err(|e| e.to_string())?;
Ok(Json(MarkClearedOut { ok: true }))
}
#[tool(
name = "books.reconcile",
description = "Reconcile a bank/cash account against a statement. Returns book balance, cleared balance, statement balance, the difference (zero means reconciled), and the list of uncleared lines."
)]
async fn reconcile(
&self,
params: Parameters<ReconcileParams>,
) -> Result<Json<ReconcileOut>, String> {
let p = params.0;
let store = self.lock()?;
let account = resolve_account(&store, &p.account)?;
let report = store
.ledger()
.reconciliation_report(
account,
parse_date(&p.statement_date)?,
parse_amount(&p.statement_balance)?,
)
.map_err(|e| e.to_string())?;
let code = store
.ledger()
.chart()
.get(account)
.map(|a| a.code.clone())
.unwrap_or_default();
let uncleared = report
.uncleared_lines
.into_iter()
.map(|l| UnclearedLineOut {
entry_id: l.entry_id,
line_index: l.line_index,
date: l.date.to_string(),
description: l.description,
side: match l.side {
Side::Debit => "debit".to_string(),
Side::Credit => "credit".to_string(),
},
amount: l.amount.to_string(),
})
.collect();
Ok(Json(ReconcileOut {
account_code: code,
book_balance: report.book_balance.to_string(),
cleared_balance: report.cleared_balance.to_string(),
statement_balance: report.statement_balance.to_string(),
difference: report.difference.to_string(),
uncleared_lines: uncleared,
}))
}
// ------------------------------------------------------------------
// A/R and A/P
// ------------------------------------------------------------------
#[tool(
name = "books.add_customer",
description = "Add a customer for accounts receivable."
)]
async fn add_customer(
&self,
params: Parameters<AddPartyParams>,
) -> Result<Json<AddPartyOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store.add_customer(&p.name).map_err(|e| e.to_string())?;
Ok(Json(AddPartyOut { id }))
}
#[tool(
name = "books.add_vendor",
description = "Add a vendor for accounts payable."
)]
async fn add_vendor(
&self,
params: Parameters<AddPartyParams>,
) -> Result<Json<AddPartyOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store.add_vendor(&p.name).map_err(|e| e.to_string())?;
Ok(Json(AddPartyOut { id }))
}
#[tool(
name = "books.create_invoice",
description = "Create a sales invoice. Auto-posts Dr Accounts Receivable / Cr Revenue. Lines are {description, amount} with decimal-string amounts."
)]
async fn create_invoice(
&self,
params: Parameters<CreateDocumentParams>,
) -> Result<Json<CreateDocumentOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let lines: Vec<DocumentLine> = p
.lines
.into_iter()
.map(|l| {
Ok(DocumentLine {
description: l.description,
amount: parse_amount(&l.amount)?,
})
})
.collect::<Result<_, String>>()?;
let id = store
.create_invoice(
p.party_id,
parse_date(&p.date)?,
parse_date(&p.due_date)?,
lines,
)
.map_err(|e| e.to_string())?;
let inv = store
.ledger()
.get_invoice(id)
.ok_or_else(|| format!("invoice {id} not found after creation"))?;
Ok(Json(CreateDocumentOut {
id,
total: inv.total().to_string(),
entry_id: inv.entry_id,
}))
}
#[tool(
name = "books.create_bill",
description = "Create a vendor bill. Auto-posts Dr General Expenses / Cr Accounts Payable. Lines are {description, amount} with decimal-string amounts."
)]
async fn create_bill(
&self,
params: Parameters<CreateDocumentParams>,
) -> Result<Json<CreateDocumentOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let lines: Vec<DocumentLine> = p
.lines
.into_iter()
.map(|l| {
Ok(DocumentLine {
description: l.description,
amount: parse_amount(&l.amount)?,
})
})
.collect::<Result<_, String>>()?;
let id = store
.create_bill(
p.party_id,
parse_date(&p.date)?,
parse_date(&p.due_date)?,
lines,
)
.map_err(|e| e.to_string())?;
let bill = store
.ledger()
.get_bill(id)
.ok_or_else(|| format!("bill {id} not found after creation"))?;
Ok(Json(CreateDocumentOut {
id,
total: bill.total().to_string(),
entry_id: bill.entry_id,
}))
}
#[tool(
name = "books.receive_payment",
description = "Record a customer payment against an invoice. Posts Dr Cash / Cr A/R."
)]
async fn receive_payment(
&self,
params: Parameters<PaymentParams>,
) -> Result<Json<PaymentOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let cash = resolve_account(&store, &p.cash_account)?;
let entry_id = store
.receive_payment(
p.document_id,
parse_date(&p.date)?,
parse_amount(&p.amount)?,
cash,
)
.map_err(|e| e.to_string())?;
let inv = store
.ledger()
.get_invoice(p.document_id)
.ok_or_else(|| format!("invoice {} not found", p.document_id))?;
Ok(Json(PaymentOut {
entry_id,
remaining: inv.balance().to_string(),
status: match inv.status {
DocumentStatus::Open => "open".to_string(),
DocumentStatus::Partial => "partial".to_string(),
DocumentStatus::Paid => "paid".to_string(),
},
}))
}
#[tool(
name = "books.pay_bill",
description = "Pay a vendor bill. Posts Dr A/P / Cr Cash."
)]
async fn pay_bill(
&self,
params: Parameters<PaymentParams>,
) -> Result<Json<PaymentOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let cash = resolve_account(&store, &p.cash_account)?;
let entry_id = store
.pay_bill(
p.document_id,
parse_date(&p.date)?,
parse_amount(&p.amount)?,
cash,
)
.map_err(|e| e.to_string())?;
let bill = store
.ledger()
.get_bill(p.document_id)
.ok_or_else(|| format!("bill {} not found", p.document_id))?;
Ok(Json(PaymentOut {
entry_id,
remaining: bill.balance().to_string(),
status: match bill.status {
DocumentStatus::Open => "open".to_string(),
DocumentStatus::Partial => "partial".to_string(),
DocumentStatus::Paid => "paid".to_string(),
},
}))
}
#[tool(
name = "books.ar_aging",
description = "A/R aging report as of a date: outstanding balances per customer, bucketed by days past due (current, 30, 60, 90, 90+)."
)]
async fn ar_aging(&self, params: Parameters<AgingParams>) -> Result<Json<AgingOut>, String> {
let p = params.0;
let store = self.lock()?;
let rows = store
.ledger()
.ar_aging(parse_date(&p.as_of)?)
.into_iter()
.map(|r| {
let total = r.total().to_string();
AgingRowOut {
name: r.name,
current: r.current.to_string(),
days_30: r.days_30.to_string(),
days_60: r.days_60.to_string(),
days_90: r.days_90.to_string(),
days_90_plus: r.days_90_plus.to_string(),
total,
}
})
.collect();
Ok(Json(AgingOut { rows }))
}
#[tool(
name = "books.ap_aging",
description = "A/P aging report as of a date: outstanding balances per vendor, bucketed by days past due (current, 30, 60, 90, 90+)."
)]
async fn ap_aging(&self, params: Parameters<AgingParams>) -> Result<Json<AgingOut>, String> {
let p = params.0;
let store = self.lock()?;
let rows = store
.ledger()
.ap_aging(parse_date(&p.as_of)?)
.into_iter()
.map(|r| {
let total = r.total().to_string();
AgingRowOut {
name: r.name,
current: r.current.to_string(),
days_30: r.days_30.to_string(),
days_60: r.days_60.to_string(),
days_90: r.days_90.to_string(),
days_90_plus: r.days_90_plus.to_string(),
total,
}
})
.collect();
Ok(Json(AgingOut { rows }))
}
// ------------------------------------------------------------------
// Foreign exchange
// ------------------------------------------------------------------
#[tool(
name = "books.set_fx_rate",
description = "Record a historical FX rate: how much base currency one unit of the foreign currency buys on the given date. For reference; lines store their own rate at entry time."
)]
async fn set_fx_rate(
&self,
params: Parameters<SetFxRateParams>,
) -> Result<Json<SetFxRateOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let currency = Currency::new(&p.currency).map_err(|e| e.to_string())?;
store
.set_fx_rate(currency, parse_date(&p.date)?, parse_amount(&p.rate)?)
.map_err(|e| e.to_string())?;
Ok(Json(SetFxRateOut { ok: true }))
}
// ------------------------------------------------------------------
// Payroll (accounting only — the caller supplies every number; no tax tables)
// ------------------------------------------------------------------
#[tool(
name = "books.run_payroll",
description = "Run payroll for a pay date. Each line carries one employee's gross pay and every withholding/deduction as decimal strings — the engine cuts one balanced entry (Dr Salary & Wage Expense, Dr Payroll Tax Expense for the employer share, Cr the withholding payables, Cr cash for net pay). Auto-creates the 61xx/21xx accounts. All amounts are decimal strings, never floats."
)]
async fn run_payroll(
&self,
params: Parameters<RunPayrollParams>,
) -> Result<Json<RunPayrollOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let cash = resolve_account(&store, &p.cash_account)?;
let lines: Vec<ledger_store::PayrollLineInput> = p
.lines
.into_iter()
.map(|l| {
Ok(ledger_core::PayrollLine {
employee_name: l.employee_name,
gross_pay: parse_amount(&l.gross_pay)?,
federal_withholding: parse_amount(&l.federal_withholding)?,
state_withholding: parse_amount(&l.state_withholding)?,
ss_employee: parse_amount(&l.ss_employee)?,
medicare_employee: parse_amount(&l.medicare_employee)?,
ss_employer: parse_amount(&l.ss_employer)?,
medicare_employer: parse_amount(&l.medicare_employer)?,
other_deductions: parse_amount(&l.other_deductions)?,
})
})
.collect::<Result<_, String>>()?;
let run_id = store
.run_payroll(parse_date(&p.date)?, lines, cash)
.map_err(|e| e.to_string())?;
let run = store
.ledger()
.get_payroll_run(run_id)
.ok_or_else(|| format!("payroll run {run_id} not found after creation"))?;
let total_gross: Decimal = run.lines.iter().map(|l| l.gross_pay).sum();
let total_net: Decimal = run.lines.iter().map(|l| l.net_pay()).sum();
Ok(Json(RunPayrollOut {
run_id,
entry_id: run.entry_id,
total_gross: money(total_gross),
total_net: money(total_net),
}))
}
#[tool(
name = "books.remit_payroll_taxes",
description = "Remit all outstanding payroll tax payables (federal/state withholding, SS, Medicare, other deductions) to cash in one balanced entry."
)]
async fn remit_payroll_taxes(
&self,
params: Parameters<RemitPayrollTaxesParams>,
) -> Result<Json<RemitPayrollTaxesOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let cash = resolve_account(&store, &p.cash_account)?;
// Total before remitting, for the response.
let mut total = Decimal::ZERO;
for code in ["2110", "2120", "2130", "2140", "2150"] {
if let Some(a) = store.ledger().chart().find_by_code(code) {
total += store
.ledger()
.account_balance(a.id)
.map_err(|e| e.to_string())?;
}
}
let entry_id = store
.remit_payroll_taxes(parse_date(&p.date)?, cash)
.map_err(|e| e.to_string())?;
Ok(Json(RemitPayrollTaxesOut {
entry_id,
total: money(total),
}))
}
#[tool(
name = "books.list_payroll_runs",
description = "List payroll runs in id order: date, employee count, totals, and the posted entry id.",
annotations(read_only_hint = true)
)]
async fn list_payroll_runs(&self) -> Result<Json<ListPayrollRunsOut>, String> {
let store = self.lock()?;
let runs = store
.list_payroll_runs()
.into_iter()
.map(|r| {
let total_gross: Decimal = r.lines.iter().map(|l| l.gross_pay).sum();
PayrollRunOut {
id: r.id,
date: r.date.to_string(),
employee_count: r.lines.len(),
total_gross: money(total_gross),
entry_id: r.entry_id,
}
})
.collect();
Ok(Json(ListPayrollRunsOut { runs }))
}
// ------------------------------------------------------------------
// Classes (divisional tracking)
// ------------------------------------------------------------------
#[tool(
name = "books.add_class",
description = "Add a tracking class for divisional P&L (e.g. an app, website, or channel). Tag journal lines with it via books.add_line's class param, then report per division."
)]
async fn add_class(
&self,
params: Parameters<AddClassParams>,
) -> Result<Json<AddClassOut>, String> {
let p = params.0;
let mut store = self.lock()?;
let id = store.add_class(&p.name).map_err(|e| e.to_string())?;
Ok(Json(AddClassOut { id }))
}
#[tool(
name = "books.list_classes",
description = "List tracking classes in id order.",
annotations(read_only_hint = true)
)]
async fn list_classes(&self) -> Result<Json<ListClassesOut>, String> {
let store = self.lock()?;
let classes = store
.list_classes()
.into_iter()
.map(|c| ClassOut {
id: c.id,
name: c.name.clone(),
})
.collect();
Ok(Json(ListClassesOut { classes }))
}
#[tool(
name = "books.profit_and_loss_by_class",
description = "P&L broken down by tracking class for a period, plus an unclassified row for untagged lines. Dates are YYYY-MM-DD; omit for all time.",
annotations(read_only_hint = true)
)]
async fn profit_and_loss_by_class(
&self,
params: Parameters<ProfitAndLossParams>,
) -> Result<Json<ProfitAndLossByClassOut>, String> {
let p = params.0;
let store = self.lock()?;
let ledger = store.ledger();
let start = match p.start {
Some(s) => parse_date(&s)?,
None => NaiveDate::from_ymd_opt(1, 1, 1).unwrap(),
};
let end = match p.end {
Some(s) => parse_date(&s)?,
None => today(),
};
if end < start {
return Err("end is before start".to_string());
}
// Per-class P&L over the date range: accumulate line by line.
use std::collections::HashMap;
#[derive(Default)]
struct Acc {
revenue: Decimal,
expenses: Decimal,
}
let mut by_class: HashMap<Option<u32>, Acc> = HashMap::new();
for entry in ledger.posted_entries() {
if entry.date() < start || entry.date() > end {
continue;
}
for line in entry.lines() {
let account = match ledger.chart().get(line.account) {
Some(a) if !a.placeholder => a,
_ => continue,
};
let signed = match line.side {
Side::Debit => line.amount.amount,
Side::Credit => -line.amount.amount,
};
// Normal-side positive.
let normal = match account.account_type.normal_side() {
Side::Debit => signed,
Side::Credit => -signed,
};
let acc = by_class.entry(line.class_id).or_default();
match account.account_type {
AccountType::Revenue => acc.revenue += normal,
AccountType::Expense => acc.expenses += normal,
_ => {}
}
}
}
// Sort: named classes by name, unclassified last.
let mut rows: Vec<(Option<String>, Acc)> = by_class
.into_iter()
.map(|(cid, acc)| {
let name = cid
.and_then(|id| ledger.get_class(id))
.map(|c| c.name.clone());
(name, acc)
})
// Drop rows with no P&L movement.
.filter(|(_, acc)| !acc.revenue.is_zero() || !acc.expenses.is_zero())
.collect();
rows.sort_by(|a, b| match (&a.0, &b.0) {
(Some(x), Some(y)) => x.cmp(y),
(Some(_), None) => std::cmp::Ordering::Less,
(None, Some(_)) => std::cmp::Ordering::Greater,
(None, None) => std::cmp::Ordering::Equal,
});
let classes = rows
.into_iter()
.map(|(class, acc)| ClassPnlOut {
class,
revenue: money(acc.revenue),
expenses: money(acc.expenses),
net_income: money(acc.revenue - acc.expenses),
})
.collect();
Ok(Json(ProfitAndLossByClassOut {
start: start.to_string(),
end: end.to_string(),
classes,
}))
}
// ------------------------------------------------------------------
// CPA handoff package
// ------------------------------------------------------------------
#[tool(
name = "books.export_cpa_package",
description = "Build the CPA handoff package as a zip (base64): the profit and loss, balance sheet, cash flow, statement of changes in members' equity (multi-member LLCs), and trial balance, each as PDF and XLSX; plus the general ledger (by account) and general journal (entry by entry) as XLSX. cash_accounts (e.g. [\"1000\"]) is required: the cash flow statement reconciles to them. as_of defaults to today; period reports cover the fiscal year to date.",
annotations(read_only_hint = true)
)]
async fn export_cpa_package(
&self,
params: Parameters<ExportCpaPackageParams>,
) -> Result<Json<ExportCpaPackageOut>, String> {
use ledger_import::{XlsxReport, report, report_to_xlsx, statement_pdf};
let p = params.0;
let as_of = match p.as_of {
Some(s) => parse_date(&s)?,
None => today(),
};
let store = self.lock()?;
let meta = self.report_meta(&store);
let ledger = store.ledger();
// Fiscal year to date, per wanderbooks.toml's fiscal_year_start.
let (fy_start, _) = self.company.fiscal_year_containing(as_of);
let (fy_start, as_of_s) = (fy_start.to_string(), as_of.to_string());
let xlsx = |r: XlsxReport<'_>| report_to_xlsx(&r, &meta).map_err(|e| e.to_string());
let pdf =
|st: &ledger_import::Statement| statement_pdf(st, &meta).map_err(|e| e.to_string());
let fy = NaiveDate::parse_from_str(&fy_start, "%Y-%m-%d").map_err(|e| e.to_string())?;
let members = self.report_members();
// The financial statements, each as PDF and XLSX.
let mut statements: Vec<(&str, ledger_import::Statement)> = vec![
(
"profit-and-loss",
report::profit_and_loss(&pnl_statement(
ledger,
Some(&fy_start),
Some(&as_of_s),
None,
)?),
),
(
"balance-sheet",
report::balance_sheet(
&bs_statement(ledger, Some(&as_of_s))?,
self.year_earnings(ledger, as_of)?,
&members,
),
),
(
"cash-flow",
report::cash_flow(
&cash_flow_statement(
ledger,
Some(&fy_start),
Some(&as_of_s),
&p.cash_accounts,
&p.financing_accounts,
)?,
&members,
),
),
];
if !self.company.members.is_empty() {
let me = ledger_core::members_equity(ledger, fy, as_of, &self.member_capitals(ledger)?)
.map_err(|e| e.to_string())?;
statements.push(("members-equity", report::members_equity(&me)));
}
statements.push((
"trial-balance",
report::trial_balance(&reports::trial_balance_as_of(ledger, as_of), as_of),
));
let mut files: Vec<(String, Vec<u8>)> = Vec::new();
for (name, st) in &statements {
files.push((format!("{name}.pdf"), pdf(st)?));
files.push((format!("{name}.xlsx"), xlsx(XlsxReport::Statement(st))?));
}
// The books behind them: by account, and entry by entry.
let gl = ledger_core::general_ledger(ledger, fy, as_of).map_err(|e| e.to_string())?;
files.push((
"general-ledger.xlsx".into(),
xlsx(XlsxReport::GeneralLedger(&gl))?,
));
files.push((
"general-journal.xlsx".into(),
xlsx(XlsxReport::GeneralJournal(ledger, fy, as_of))?,
));
drop(store);
// Zip it.
let mut zip_buf = Vec::new();
{
let mut zip = zip::ZipWriter::new(std::io::Cursor::new(&mut zip_buf));
let opts = zip::write::SimpleFileOptions::default();
for (name, bytes) in &files {
zip.start_file(name.as_str(), opts)
.map_err(|e| e.to_string())?;
use std::io::Write;
zip.write_all(bytes).map_err(|e| e.to_string())?;
}
zip.finish().map_err(|e| e.to_string())?;
}
Ok(Json(ExportCpaPackageOut {
file_name: format!("cpa-package-{as_of}.zip"),
content_base64: base64::Engine::encode(
&base64::engine::general_purpose::STANDARD,
&zip_buf,
),
}))
}
}
// ---------------------------------------------------------------------------
// Export builders (called under the tool lock via &self)
// ---------------------------------------------------------------------------
impl BooksServer {
fn export_journal(&self, format: &str) -> Result<String, String> {
let store = self.lock()?;
let ledger = store.ledger();
if format == "json" {
let rows: Vec<serde_json::Value> = ledger
.posted_entries()
.map(|e| {
serde_json::json!({
"entry_id": e.id(),
"date": e.date().to_string(),
"description": e.description(),
"reversal_of": e.reversal_of(),
"lines": e.lines().iter().map(|l| {
let a = ledger.chart().get(l.account).unwrap();
serde_json::json!({
"account_code": a.code,
"account_name": a.name,
"side": match l.side { Side::Debit => "debit", Side::Credit => "credit" },
"amount": money(l.amount.amount),
"currency": l.amount.currency.code(),
})
}).collect::<Vec<_>>(),
})
})
.collect();
return serde_json::to_string_pretty(&rows).map_err(|e| e.to_string());
}
let mut csv = String::from(
"entry_id,date,description,reversal_of,account_code,account_name,side,amount,currency\n",
);
for e in ledger.posted_entries() {
for l in e.lines() {
let a = ledger.chart().get(l.account).unwrap();
csv.push_str(&format!(
"{},{},{},{},{},{},{},{},{}\n",
e.id(),
e.date(),
csv_escape(e.description()),
e.reversal_of().map(|v| v.to_string()).unwrap_or_default(),
a.code,
csv_escape(&a.name),
match l.side {
Side::Debit => "debit",
Side::Credit => "credit",
},
money(l.amount.amount),
l.amount.currency.code(),
));
}
}
Ok(csv)
}
fn export_trial_balance(&self, format: &str, as_of: Option<&str>) -> Result<String, String> {
let store = self.lock()?;
let as_of = match as_of {
Some(s) => parse_date(s)?,
None => today(),
};
let tb = reports::trial_balance_as_of(store.ledger(), as_of);
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"as_of": as_of.to_string(),
"lines": tb.lines.iter().map(|l| serde_json::json!({
"code": l.code, "name": l.name,
"debit": money(l.debit), "credit": money(l.credit),
})).collect::<Vec<_>>(),
"total_debits": money(tb.total_debits),
"total_credits": money(tb.total_credits),
"balanced": tb.balanced(),
}))
.map_err(|e| e.to_string());
}
let mut csv = String::from("code,name,debit,credit\n");
for l in &tb.lines {
csv.push_str(&format!(
"{},{},{},{}\n",
l.code,
csv_escape(&l.name),
money(l.debit),
money(l.credit)
));
}
csv.push_str(&format!(
"TOTAL,,{},{}",
money(tb.total_debits),
money(tb.total_credits)
));
Ok(csv)
}
fn export_general_ledger(&self, format: &str, p: &ExportParams) -> Result<String, String> {
let store = self.lock()?;
let ledger = store.ledger();
let (start, end) = statement_range(ledger, p.start.as_deref(), p.end.as_deref())?;
let gl = ledger_core::general_ledger(ledger, start, end).map_err(|e| e.to_string())?;
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"start": gl.start.to_string(), "end": gl.end.to_string(),
"accounts": gl.accounts.iter().map(|a| serde_json::json!({
"code": a.code, "name": a.name,
"beginning_balance": money(a.beginning_balance),
"postings": a.postings.iter().map(|p| serde_json::json!({
"date": p.date.to_string(), "entry_id": p.entry_id,
"description": p.description, "split": p.split,
"debit": money(p.debit), "credit": money(p.credit),
"balance": money(p.balance),
})).collect::<Vec<_>>(),
"total_debits": money(a.total_debits),
"total_credits": money(a.total_credits),
"ending_balance": money(a.ending_balance),
})).collect::<Vec<_>>(),
}))
.map_err(|e| e.to_string());
}
let mut csv = String::from("account,date,entry,description,split,debit,credit,balance\n");
for a in &gl.accounts {
let account = csv_escape(&format!("{} {}", a.code, a.name));
csv.push_str(&format!(
"{account},,,Beginning balance,,,,{}\n",
money(a.beginning_balance)
));
for p in &a.postings {
csv.push_str(&format!(
"{account},{},{},{},{},{},{},{}\n",
p.date,
p.entry_id,
csv_escape(&p.description),
csv_escape(&p.split),
money(p.debit),
money(p.credit),
money(p.balance)
));
}
csv.push_str(&format!(
"{account},,,Total,,{},{},{}\n",
money(a.total_debits),
money(a.total_credits),
money(a.ending_balance)
));
}
Ok(csv)
}
fn export_members_equity(&self, format: &str, p: &ExportParams) -> Result<String, String> {
let store = self.lock()?;
let ledger = store.ledger();
let (start, end) = statement_range(ledger, p.start.as_deref(), p.end.as_deref())?;
let me = ledger_core::members_equity(ledger, start, end, &self.member_capitals(ledger)?)
.map_err(|e| e.to_string())?;
let col = |c: &ledger_core::MemberEquityColumn| {
serde_json::json!({
"name": c.name, "beginning": money(c.beginning),
"contributions": money(c.contributions), "net_income": money(c.net_income),
"distributions": money(c.distributions), "other": money(c.other),
"ending": money(c.ending),
})
};
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"start": me.start.to_string(), "end": me.end.to_string(),
"members": me.members.iter().map(col).collect::<Vec<_>>(),
"total": col(&me.total),
}))
.map_err(|e| e.to_string());
}
let mut csv =
String::from("member,beginning,contributions,net_income,distributions,other,ending\n");
for c in me.members.iter().chain(std::iter::once(&me.total)) {
csv.push_str(&format!(
"{},{},{},{},{},{},{}\n",
csv_escape(&c.name),
money(c.beginning),
money(c.contributions),
money(c.net_income),
money(c.distributions),
money(c.other),
money(c.ending)
));
}
Ok(csv)
}
fn export_pnl(
&self,
format: &str,
start: Option<&str>,
end: Option<&str>,
) -> Result<String, String> {
let store = self.lock()?;
let pl = pnl_statement(store.ledger(), start, end, None)?;
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"start": pl.start.to_string(), "end": pl.end.to_string(),
"revenue_accounts": lines_out(&pl.revenue),
"expense_accounts": lines_out(&pl.expenses),
"revenue": money(pl.total_revenue), "expenses": money(pl.total_expenses),
"net_income": money(pl.net_income()),
}))
.map_err(|e| e.to_string());
}
let mut csv = String::from("section,code,name,amount\n");
for (section, lines) in [("revenue", &pl.revenue), ("expenses", &pl.expenses)] {
for l in lines {
csv.push_str(&format!(
"{section},{},{},{}\n",
csv_escape(&l.code),
csv_escape(&l.name),
money(l.amount)
));
}
}
csv.push_str(&format!(
"total,,revenue,{}\ntotal,,expenses,{}\ntotal,,net_income,{}\n",
money(pl.total_revenue),
money(pl.total_expenses),
money(pl.net_income())
));
Ok(csv)
}
fn export_balance_sheet(&self, format: &str, as_of: Option<&str>) -> Result<String, String> {
let store = self.lock()?;
let bs = bs_statement(store.ledger(), as_of)?;
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"as_of": bs.as_of.to_string(),
"asset_accounts": lines_out(&bs.assets),
"liability_accounts": lines_out(&bs.liabilities),
"equity_accounts": lines_out(&bs.equity),
"assets": money(bs.total_assets), "liabilities": money(bs.total_liabilities),
"equity": money(bs.total_equity), "current_earnings": money(bs.current_earnings),
"balanced": bs.balanced(),
}))
.map_err(|e| e.to_string());
}
let mut csv = String::from("section,code,name,amount\n");
for (section, lines) in [
("assets", &bs.assets),
("liabilities", &bs.liabilities),
("equity", &bs.equity),
] {
for l in lines {
csv.push_str(&format!(
"{section},{},{},{}\n",
csv_escape(&l.code),
csv_escape(&l.name),
money(l.amount)
));
}
}
csv.push_str(&format!(
"equity,,current_earnings,{}\ntotal,,assets,{}\ntotal,,liabilities,{}\ntotal,,equity,{}\n",
money(bs.current_earnings),
money(bs.total_assets),
money(bs.total_liabilities),
money(bs.total_equity)
));
Ok(csv)
}
fn export_cash_flow(&self, format: &str, p: &ExportParams) -> Result<String, String> {
let store = self.lock()?;
let ledger = store.ledger();
let mut cash_accounts = Vec::new();
for code in &p.cash_accounts {
let id = ledger
.chart()
.find_by_code(code)
.map(|a| a.id)
.ok_or_else(|| format!("unknown cash account code: {code}"))?;
cash_accounts.push(id);
}
if cash_accounts.is_empty() {
return Err("cash_accounts is required for cash_flow".to_string());
}
let start = match &p.start {
Some(s) => parse_date(s)?,
None => NaiveDate::from_ymd_opt(1, 1, 1).unwrap(),
};
let end = match &p.end {
Some(s) => parse_date(s)?,
None => today(),
};
let stmt = ledger_core::cash_flow(
ledger,
&ledger_core::CashFlowParams {
start,
end,
cash_accounts,
financing_accounts: vec![],
},
)
.map_err(|e| e.to_string())?;
if format == "json" {
return serde_json::to_string_pretty(&serde_json::json!({
"start": stmt.start.to_string(), "end": stmt.end.to_string(),
"net_income": money(stmt.net_income),
"depreciation": money(stmt.depreciation),
"working_capital": stmt.working_capital.iter().map(|l| serde_json::json!({
"label": l.label, "amount": money(l.amount),
})).collect::<Vec<_>>(),
"cash_from_operations": money(stmt.cash_from_operations),
"investing": stmt.investing.iter().map(|l| serde_json::json!({
"label": l.label, "amount": money(l.amount),
})).collect::<Vec<_>>(),
"cash_from_investing": money(stmt.cash_from_investing),
"financing": stmt.financing.iter().map(|l| serde_json::json!({
"label": l.label, "amount": money(l.amount),
})).collect::<Vec<_>>(),
"cash_from_financing": money(stmt.cash_from_financing),
"net_change_in_cash": money(stmt.net_change_in_cash),
"cash_beginning": money(stmt.cash_beginning),
"cash_ending": money(stmt.cash_ending),
}))
.map_err(|e| e.to_string());
}
let mut csv = String::from("section,label,amount\n");
csv.push_str(&format!(
"operating,Net income,{}\n",
money(stmt.net_income)
));
csv.push_str(&format!(
"operating,Depreciation,{}\n",
money(stmt.depreciation)
));
for l in &stmt.working_capital {
csv.push_str(&format!(
"operating,{},{}\n",
csv_escape(&l.label),
money(l.amount)
));
}
csv.push_str(&format!(
"operating,Cash from operations,{}\n",
money(stmt.cash_from_operations)
));
for l in &stmt.investing {
csv.push_str(&format!(
"investing,{},{}\n",
csv_escape(&l.label),
money(l.amount)
));
}
csv.push_str(&format!(
"investing,Cash from investing,{}\n",
money(stmt.cash_from_investing)
));
for l in &stmt.financing {
csv.push_str(&format!(
"financing,{},{}\n",
csv_escape(&l.label),
money(l.amount)
));
}
csv.push_str(&format!(
"financing,Cash from financing,{}\n",
money(stmt.cash_from_financing)
));
csv.push_str(&format!(
"reconciliation,Net change in cash,{}\n",
money(stmt.net_change_in_cash)
));
Ok(csv)
}
}
fn csv_escape(s: &str) -> String {
if s.contains([',', '"', '\n']) {
format!("\"{}\"", s.replace('"', "\"\""))
} else {
s.to_string()
}
}
// ---------------------------------------------------------------------------
// ServerHandler
// ---------------------------------------------------------------------------
impl BooksServer {
/// Render a resource URI to its JSON text. Used by `read_resource`.
async fn resource_text(&self, uri: &str) -> Result<String, String> {
// Split off the query string for URIs like books://digest?since=...
let (path, query) = match uri.split_once('?') {
Some((p, q)) => (p, q),
None => (uri, ""),
};
match path {
"books://chart" => {
let Json(out) = self.chart().await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
"books://reports/trial-balance" => {
let Json(out) = self
.trial_balance(Parameters(TrialBalanceParams::default()))
.await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
"books://reports/balance-sheet" => {
let Json(out) = self
.balance_sheet(Parameters(BalanceSheetParams { as_of: None }))
.await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
"books://reports/profit-and-loss" => {
let Json(out) = self
.profit_and_loss(Parameters(ProfitAndLossParams {
start: None,
end: None,
class: None,
}))
.await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
"books://digest" => {
let since = query
.split('&')
.find_map(|kv| kv.strip_prefix("since="))
.unwrap_or("")
.to_string();
let Json(out) = self.digest(Parameters(DigestParams { since })).await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
_ if path.starts_with("books://receipts/") => {
let id: u64 = path
.strip_prefix("books://receipts/")
.unwrap_or("")
.parse()
.map_err(|_| format!("bad receipt resource URI: {uri}"))?;
let Json(out) = self
.get_receipt(Parameters(GetReceiptParams { attachment_id: id }))
.await?;
serde_json::to_string_pretty(&out).map_err(|e| e.to_string())
}
_ => Err(format!("unknown resource: {uri}")),
}
}
}
#[tool_handler]
impl ServerHandler for BooksServer {
fn get_info(&self) -> ServerConfig {
ServerConfig::new(
ServerCapabilities::builder()
.enable_tools()
.enable_resources()
.build(),
)
.with_instructions(INSTRUCTIONS)
.with_server_info(Implementation::new(
"wanderbooks",
env!("CARGO_PKG_VERSION"),
))
}
async fn list_resources(
&self,
_request: Option<rmcp::model::PaginatedRequestParams>,
_context: RequestContext<RoleServer>,
) -> Result<ListResourcesResult, rmcp::ErrorData> {
let mk = |uri: &str, name: &str, title: &str, description: &str| {
let mut r = Resource::new(uri, name);
r.title = Some(title.to_string());
r.description = Some(description.to_string());
r.mime_type = Some("application/json".to_string());
r
};
let resources = vec![
mk(
"books://chart",
"chart",
"Chart of accounts",
"All accounts with codes, types, and hierarchy.",
),
mk(
"books://reports/trial-balance",
"trial-balance",
"Trial balance",
"Current trial balance, debits equal credits.",
),
mk(
"books://reports/balance-sheet",
"balance-sheet",
"Balance sheet",
"Assets, liabilities, equity.",
),
mk(
"books://reports/profit-and-loss",
"profit-and-loss",
"Profit and loss",
"Revenue, expenses, net income.",
),
mk(
"books://digest",
"digest",
"Activity digest",
"What changed in the books. Optional ?since=YYYY-MM-DD query.",
),
];
Ok(ListResourcesResult::with_all_items(resources))
}
async fn read_resource(
&self,
request: ReadResourceRequestParams,
_context: RequestContext<RoleServer>,
) -> Result<ReadResourceResponse, rmcp::ErrorData> {
let uri = request.uri.clone();
let text = self.resource_text(&uri).await.map_err(|e| {
rmcp::ErrorData::resource_not_found(uri.clone(), Some(serde_json::json!({"reason": e})))
})?;
Ok(ReadResourceResponse::Complete(ReadResourceResult::new(
vec![ResourceContents::TextResourceContents {
uri,
mime_type: Some("application/json".to_string()),
text,
meta: None,
}],
)))
}
}
#[cfg(test)]
mod tests {
use super::money;
use rust_decimal::Decimal;
use std::str::FromStr;
#[test]
fn money_always_has_cents_and_never_rounds() {
let m = |s: &str| money(Decimal::from_str(s).unwrap());
assert_eq!(money(Decimal::ZERO), "0.00");
assert_eq!(m("-0"), "0.00");
assert_eq!(m("1000"), "1000.00");
assert_eq!(m("5.8"), "5.80");
assert_eq!(m("-207.68"), "-207.68");
assert_eq!(m("12.3456"), "12.3456");
}
}