js-gpiozero/gpiozero/tools.js

A simple interface to GPIO devices with Raspberry Pi using nodejs

exports.with_close = function(device, method) {
    method(device);
    device.close();
};


exports.inherit = function(proto) {
    /*eslint no-empty-function: off*/
    function F() {}
    F.prototype = proto;
    return new F();
};

// Pass in the objects to merge as arguments.
// For a deep extend, set the first argument to `true`.
exports.extend = extend;

/*eslint prefer-rest-params: off*/
function extend() {

    // Variables
    const extended = {};
    let deep = false;
    let i = 0;
    const length = arguments.length;

    // Check if a deep merge
    if (Object.prototype.toString.call(arguments[0]) === '[object Boolean]') {
        deep = arguments[0];
        i++;
    }

    // Merge the object into the extended object
    const merge = function(obj) {
        for (const prop in obj) {
            if (Object.prototype.hasOwnProperty.call(obj, prop)) {
                // If deep merge and property is an object, merge properties
                if (deep && Object.prototype.toString.call(obj[prop]) === '[object Object]') {
                    extended[prop] = extend(true, extended[prop], obj[prop]);
                } else {
                    extended[prop] = obj[prop];
                }
            }
        }
    };

    // Loop through each object and conduct a merge
    for (; i < length; i++) {
        const obj = arguments[i];
        merge(obj);
    }

    return extended;
}

/*eslint prefer-rest-params: off*/
function _extend_object() {

    // Variables

    let deep = false;
    let i = 0;
    const length = arguments.length;

    // Check if a deep merge
    if (Object.prototype.toString.call(arguments[0]) === '[object Boolean]') {
        deep = arguments[0];
        i++;
    }
    const extended = arguments[i];
    i++;

    // Merge the object into the extended object
    const merge = function(obj) {
        for (const prop in obj) {
            if (Object.prototype.hasOwnProperty.call(obj, prop)) {
                // If deep merge and property is an object, merge properties
                if (deep && Object.prototype.toString.call(obj[prop]) === '[object Object]') {
                    extended[prop] = extend(true, extended[prop], obj[prop]);
                } else {
                    extended[prop] = obj[prop];
                }
            }
        }
    };
    // Loop through each object and conduct a merge
    for (; i < length; i++) {
        const obj = arguments[i];
        merge(obj);
    }
}

// Pass in the objects to merge as arguments.
// For a deep extend, set the first argument to `true`.
exports._extend_object = _extend_object;