learning-jsdp/ch07/command.html at main · addyosmani/learning-jsdp · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Command Pattern Interactive Example with List</title>
    <style>
        button {
            margin-bottom: 10px;
        }
    </style>
</head>
<body>
    <h1>Command Pattern Interactive Example with List</h1>
    <ul id="carList">
        <li>
            <input type="checkbox" id="car1" data-model="Ford Mondeo" data-id="54323" data-info="The Ford Mondeo is a mid-size car with great fuel efficiency.">
            <label for="car1">Ford Mondeo (ID: 54323)</label>
        </li>
        <li>
            <input type="checkbox" id="car2" data-model="Ford Escort" data-id="34232" data-info="The Ford Escort is a compact car known for its reliability and affordable price.">
            <label for="car2">Ford Escort (ID: 34232)</label>
        </li>
        <li>
            <input type="checkbox" id="car3" data-model="Ferrari" data-id="14523" data-info="The Ferrari is a luxury sports car with high performance and stunning design.">
            <label for="car3">Ferrari (ID: 14523)</label>
        </li>
    </ul>
    <button id="requestInfo">Request Car Information</button>
    <button id="buyVehicle">Buy Car</button>
    <button id="arrangeViewing">Arrange Viewing</button>
    <div id="output"></div>
    <script>
        const CarManager = {
            requestInfo(model, id, info) {
                return `The information for ${model} with ID ${id} is: ${info}`;
            },

            buyVehicle(model, id) {
                return `You have successfully purchased Item ${id}, a ${model}`;
            },

            arrangeViewing(model, id) {
                return `You have booked a viewing of ${model} ( ${id} ) `;
            }
        };

        CarManager.execute = function(name) {
            return (
                CarManager[name] &&
                CarManager[name].apply(CarManager, [].slice.call(arguments, 1))
            );
        };

        const getCheckedCar = () => {
            const checkboxes = document.querySelectorAll('#carList input[type="checkbox"]');
            let checkedCar = null;

            checkboxes.forEach(checkbox => {
                if (checkbox.checked) {
                    checkedCar = {
                        model: checkbox.dataset.model,
                        id: checkbox.dataset.id,
                        info: checkbox.dataset.info
                    };
                }
            });

            return checkedCar;
        };

        document.getElementById('requestInfo').addEventListener('click', () => {
            const car = getCheckedCar();

            if (car) {
                const result = CarManager.execute('requestInfo', car.model, car.id, car.info);
                document.getElementById('output').innerHTML = result;
            } else {
                alert('Please select a car.');
            }
        });

        document.getElementById('buyVehicle').addEventListener('click', () => {
            const car = getCheckedCar();

            if (car) {
                const result = CarManager.execute('buyVehicle', car.model, car.id);
                document.getElementById('output').innerHTML = result;
            } else {
                alert('Please select a car.');
            }
        });

        document.getElementById('arrangeViewing').addEventListener('click', () => {
            const car = getCheckedCar();

            if (car) {
                const result = CarManager.execute('arrangeViewing', car.model, car.id);
            document.getElementById('output').innerHTML = result;
        } else {
            console.log('Please select a car.');
        }
    });
</script>