Chp1. baseApp.js src - Githubissues

let plays =   {
    "hamlet": {"name": "Hamlet", "type": "tragedy"},
    "as-like": {"name": "As You Like It", "type": "comedy"},
    "othello": {"name": "Othello", "type": "tragedy"}
};
let invoices =

        {
            "customer": "BigCo",
            "performances": [
                {
                    "playID": "hamlet",
                    "audience": 55
                },
                {
                    "playID": "as-like",
                    "audience": 35
                },
                {
                    "playID": "othello",
                    "audience": 40
                }
            ]
        }

function statement (invoice, play) {
    let totalAmount = 0;
    let volumeCredits = 0;
    let result = `Statement for ${invoice.customer}\n`;
    const format = new Intl.NumberFormat("en-US",
        { style: "currency", currency: "USD",
            minimumFractionDigits: 2 }).format;

    console.log(invoice.performances)
    for (let perf of invoice.performances) {
        const play = plays[perf.playID];
        let thisAmount = 0;

        switch (play.type) {
            case "tragedy":
                thisAmount = 40000;
                if (perf.audience > 30) {
                    thisAmount += 1000 * (perf.audience - 30);
                }
                break;
            case "comedy":
                thisAmount = 30000;
                if (perf.audience > 20) {
                    thisAmount += 10000 + 500 * (perf.audience - 20);
                }
                thisAmount += 300 * perf.audience;
                break;
            default:
                throw new Error(`unknown type: ${play.type}`);
        }

        // add volume credits
        volumeCredits += Math.max(perf.audience - 30, 0);
        // add extra credit for every ten comedy attendees
        if ("comedy" === play.type) volumeCredits += Math.floor(perf.audience / 5);

        // print line for this order
        result += `  ${play.name}: ${format(thisAmount/100)} (${perf.audience} seats)\n`;
        totalAmount += thisAmount;
    }
    result += `Amount owed is ${format(totalAmount/100)}\n`;
    result += `You earned ${volumeCredits} credits\n`;
    return result;
}

(async () => {
    console.info("start here ==")
    console.info(  statement(invoices, plays))

})();
dkmin / martin-fowler-refactoring-2nd

Chp1. baseApp.js src #1
