source: node_modules/color-convert/index.js

const conversions = require('./conversions');
const route = require('./route');

const convert = {};

const models = Object.keys(conversions);

function wrapRaw(fn) {
        const wrappedFn = function (...args) {
                const arg0 = args[0];
                if (arg0 === undefined || arg0 === null) {
                        return arg0;
                }

                if (arg0.length > 1) {
                        args = arg0;
                }

                return fn(args);
        };

        // Preserve .conversion property if there is one
        if ('conversion' in fn) {
                wrappedFn.conversion = fn.conversion;
        }

        return wrappedFn;
}

function wrapRounded(fn) {
        const wrappedFn = function (...args) {
                const arg0 = args[0];

                if (arg0 === undefined || arg0 === null) {
                        return arg0;
                }

                if (arg0.length > 1) {
                        args = arg0;
                }

                const result = fn(args);

                // We're assuming the result is an array here.
                // see notice in conversions.js; don't use box types
                // in conversion functions.
                if (typeof result === 'object') {
                        for (let len = result.length, i = 0; i < len; i++) {
                                result[i] = Math.round(result[i]);
                        }
                }

                return result;
        };

        // Preserve .conversion property if there is one
        if ('conversion' in fn) {
                wrappedFn.conversion = fn.conversion;
        }

        return wrappedFn;
}

models.forEach(fromModel => {
        convert[fromModel] = {};

        Object.defineProperty(convert[fromModel], 'channels', {value: conversions[fromModel].channels});
        Object.defineProperty(convert[fromModel], 'labels', {value: conversions[fromModel].labels});

        const routes = route(fromModel);
        const routeModels = Object.keys(routes);

        routeModels.forEach(toModel => {
                const fn = routes[toModel];

                convert[fromModel][toModel] = wrapRounded(fn);
                convert[fromModel][toModel].raw = wrapRaw(fn);
        });
});

module.exports = convert;