catcrafts.net/server/implementations/Catcrafts.Server-Financials.cpp

/*
catcrafts.net
Copyright (C) 2026 Catcrafts

The source code of this website is made available for viewing purposes only.
No permission is granted to copy, modify, distribute, or create derivative works.
*/

// The public financials aggregates.
//
// The page at /financials shows running totals only. Sales and shop donations
// fold out of the order ledger on every request (Orders.cpp); the bank-side
// donations and the expenses come from the aggregates file this unit reads —
// written by the owner's own tooling, off this box, and re-read per request so
// updating the file is all it takes to update the page.
//
// This unit once also held the bunq mutation callback that moved those numbers
// live (parser, default-deny classifier, dedup ledger, signature check). That
// integration was retired 2026-08-17 — the webhook is deregistered and the
// endpoint is gone — and the file is in git history if a bank feed ever comes
// back. What survives is the privacy property the page still promises: the
// only bank-derived state on this box is category totals with an as-of date;
// no transaction, counterparty or timestamp ever reaches disk here.

module;
module Catcrafts.Server;

import std;
import Catcrafts.Shared;

namespace Catcrafts::Server {

namespace {

std::mutex gFinMutex;
FinancialsConfig gFinCfg;

std::string ReadStateFile(const std::filesystem::path& p) {
    if (p.empty()) return {};
    std::ifstream in(p, std::ios::binary);
    if (!in) return {};
    std::ostringstream buf;
    buf << in.rdbuf();
    return buf.str();
}

} // namespace

void ConfigureFinancials(FinancialsConfig config) {
    std::lock_guard lock(gFinMutex);
    gFinCfg = std::move(config);
}

Financials CurrentFinancials() {
    std::lock_guard lock(gFinMutex);
    return LoadFinancials(ReadStateFile(gFinCfg.publicPath));
}

} // namespace Catcrafts::Server