Build variant slug from pattern

sandbox.js

const Product = {
    "attributes": [
        {
            "name": "Color",
            "value": "red", // whatever
        },
        {
            "name": "Size",
            "value": 'M',
        },
    ],
    "pattern": "Color-Size",
}

buildSlug = (product) => {
    pattern = product.pattern.split('-');
    const parts = [];

    const partCount = pattern.length;
    for (let i = 0; i < partCount; i++) {
        const partName = pattern[i];
        const attrCount = product.attributes.length;

        const attr = product.attributes.find(attr => attr.name === partName);

        if (attr === undefined) {
            throw "Attribute not found.";
        }

        parts.push(attr.value);
    }

    return parts.join('-');
};

console.log(buildSlug(Product));