JoshHeaps.Net/tests/holdem/load.js

// Loads the dealer's browser modules into Node so they can be tested directly.
//
// The modules are plain script-tag files: each one declares a `const` namespace and
// ends with a `module.exports` guard. In the browser they find each other as globals,
// so the same names have to exist on `globalThis` here or `Betting` can't reach
// `HoldemState`. Load order matches the <script> order in TexasHoldem.cshtml.
const path = require("path");

const SRC = path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "js", "casino", "holdem");

function load(name) {
    const mod = require(path.join(SRC, `${name}.js`));
    globalThis[name.charAt(0).toUpperCase() + name.slice(1)] = mod;
    return mod;
}

const Money = load("money");
const HandRank = load("handRank");
const PotCalculator = load("potCalculator");
const SplitCalculator = load("splitCalculator");
const Betting = load("betting");
const SettleUp = load("settleUp");
const HandHistoryExport = load("handHistoryExport");

// render.js exports { Render } rather than the namespace directly.
const Render = require(path.join(SRC, "render.js")).Render;
globalThis.Render = Render;

// state.js exports `HoldemState`, which doesn't match its filename.
const HoldemState = require(path.join(SRC, "state.js"));
globalThis.HoldemState = HoldemState;

// actionBar.js after state, since its own module-level code reaches for neither but
// its methods reach for both. Loaded last so nothing it touches is still undefined.
const ActionBar = load("actionBar");

// The picker's slot bookkeeping — which slots it is filling, what is already dealt —
// is plain state work and testable here. Only render() and open() touch the DOM.
const CardPicker = load("cardPicker");

// The wake lock's rule about when a table needs the screen is plain state work too.
// Its acquire/release bookkeeping is testable here as well, against a stand-in for
// navigator.wakeLock — see wakeLock.test.js.
const WakeLock = load("wakeLock");

// Modal is DOM behaviour through and through, but two pieces of it answer here: the
// list of what counts as a Tab stop, which is a string, and preservingFocus, which asks
// so little of a document that a stand-in can answer it. See theKeyboardInASheet.
const Modal = load("modal");

// The seat menu's list — which actions a seat is offered and which group each one
// lands in — is decided before anything is drawn, so actionsFor() answers here. Only
// render() and open() touch the DOM.
const SeatMenu = load("seatMenu");

// ---- Table builders ----------------------------------------------------------

// A table with `seatCount` chairs where `seated` (a list of seat indexes) are dealt
// in with `stack` chips each. Everything else is the app's own defaults, so a test
// that forgets to set a field gets whatever a real dealer would get.
function makeTable({ seatCount = 6, seated = null, stack = 100, smallBlind = 1, bigBlind = 2, dealerSeatIndex = 0 } = {}) {
    const state = HoldemState.createDefault();
    HoldemState.resizeSeats(state, seatCount);
    state.smallBlind = smallBlind;
    state.bigBlind = bigBlind;
    state.dealerSeatIndex = dealerSeatIndex;

    const sitting = seated || state.seats.map((_, i) => i);
    state.seats.forEach((player, index) => {
        player.inHand = sitting.includes(index);
        player.stack = sitting.includes(index) ? stack : null;
        player.name = `P${index + 1}`;
    });
    return state;
}

// Total chips the table is accountable for: what's in front of everyone, plus what
// they've pushed in this street, plus what's already banked into the pot.
function chipsOnTable(state) {
    return Money.round(
        state.seats.reduce(
            (sum, p) => sum + (Number(p.stack) || 0) + (Number(p.committed) || 0) + (Number(p.amountOverride) || 0),
            0
        )
    );
}

// Contributions in the shape PotCalculator wants them.
function contributions(state) {
    return state.seats
        .filter(p => p.inHand)
        .map(p => ({
            id: p.id,
            contribution: Betting.handTotal(p),
            folded: p.folded,
        }));
}

module.exports = {
    Money,
    HandRank,
    Render,
    HandHistoryExport,
    PotCalculator,
    SplitCalculator,
    SettleUp,
    Betting,
    HoldemState,
    ActionBar,
    CardPicker,
    WakeLock,
    SeatMenu,
    Modal,
    makeTable,
    chipsOnTable,
    contributions,
};