bySpecies.js

/**
 * For each species, execute the gremlin 100 times, separated by a 10ms delay
 */
define(function(require) {
    "use strict";

    var executeInSeries = require('../utils/executeInSeries');
    var configurable = require('../utils/configurable');

    return function() {

        /**
         * @mixin
         */
        var config = {
            delay: 10, // delay in milliseconds between each attack
            nb: 100    // number of attacks to execute (can be overridden in params)
        };

        var stopped;
        var doneCallback;

        /**
         * @mixes config
         */
        function bySpeciesStrategy(gremlins, params, done) {
            var nb = params && params.nb ? params.nb : config.nb,
                gremlins = gremlins.slice(0), // clone the array to avoid modifying the original
                horde = this;

            stopped = false;
            doneCallback = done; // done can also be called by stop()

            function executeNext(gremlin, i, callback) {
                if (stopped) return;
                if (i >= nb) return callback();
                executeInSeries([gremlin], [], horde, function() {
                    setTimeout(function() {
                        executeNext(gremlin, ++i, callback);
                    }, config.delay);
                });
            }

            function executeNextGremlin() {
                if (stopped) return;
                if (gremlins.length === 0) {
                    return callDone();
                }
                executeNext(gremlins.shift(), 0, executeNextGremlin);
            }

            executeNextGremlin();
        }

        bySpeciesStrategy.stop = function() {
            stopped = true;
            setTimeout(callDone, 4);
        };

        function callDone() {
            if (typeof doneCallback === 'function') {
                doneCallback();
            }
            doneCallback = null;
        }

        configurable(bySpeciesStrategy, config);

        return bySpeciesStrategy;
    };
});