dynatrace-cordova-outsystems-plugin/node_modules/stealthy-require/lib/index.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

'use strict';

var isNative = /\.node$/;

function forEach(obj, callback) {
    for ( var key in obj ) {
        if (!Object.prototype.hasOwnProperty.call(obj, key)) {
            continue;
        }
        callback(key);
    }
}

function assign(target, source) {
    forEach(source, function (key) {
        target[key] = source[key];
    });
    return target;
}

function clearCache(requireCache) {
    forEach(requireCache, function (resolvedPath) {
        if (!isNative.test(resolvedPath)) {
            delete requireCache[resolvedPath];
        }
    });
}

module.exports = function (requireCache, callback, callbackForModulesToKeep, module) {

    var originalCache = assign({}, requireCache);
    clearCache(requireCache);

    if (callbackForModulesToKeep) {

        var originalModuleChildren = module.children ? module.children.slice() : false; // Creates a shallow copy of module.children

        callbackForModulesToKeep();

        // Lists the cache entries made by callbackForModulesToKeep()
        var modulesToKeep = [];
        forEach(requireCache, function (key) {
            modulesToKeep.push(key);
        });

        // Discards the modules required in callbackForModulesToKeep()
        clearCache(requireCache);

        if (module.children) { // Only true for node.js
            module.children = originalModuleChildren; // Removes last references to modules required in callbackForModulesToKeep() -> No memory leak
        }

        // Takes the cache entries of the original cache in case the modules where required before
        for ( var i = 0; i < modulesToKeep.length; i+=1 ) {
            if (originalCache[modulesToKeep[i]]) {
                requireCache[modulesToKeep[i]] = originalCache[modulesToKeep[i]];
            }
        }

    }

    var freshModule = callback();

    var stealthCache = callbackForModulesToKeep ? assign({}, requireCache) : false;

    clearCache(requireCache);

    if (callbackForModulesToKeep) {
        // In case modules to keep were required inside the stealthy require for the first time, copy them to the restored cache
        for ( var k = 0; k < modulesToKeep.length; k+=1 ) {
            if (stealthCache[modulesToKeep[k]]) {
                requireCache[modulesToKeep[k]] = stealthCache[modulesToKeep[k]];
            }
        }
    }

    assign(requireCache, originalCache);

    return freshModule;

};