watchAcceleration: function()

in www/accelerometer.js [158:205]

• 30 lines of code
• 9 McCabe index (conditional complexity)

    watchAcceleration: function (successCallback, errorCallback, options) {
        argscheck.checkArgs('fFO', 'accelerometer.watchAcceleration', arguments);
        // Default interval (10 sec)
        var frequency = options && options.frequency && typeof options.frequency === 'number' ? options.frequency : 10000;

        // Keep reference to watch id, and report accel readings as often as defined in frequency
        var id = utils.createUUID();

        var p = createCallbackPair(
            function () {},
            function (e) {
                removeListeners(p);
                if (errorCallback) {
                    errorCallback(e);
                }
            }
        );
        listeners.push(p);

        timers[id] = {
            timer: window.setInterval(function () {
                if (accel) {
                    successCallback(accel);
                }
            }, frequency),
            listeners: p
        };

        if (running) {
            // If we're already running then immediately invoke the success callback
            // but only if we have retrieved a value, sample code does not check for null ...
            if (accel) {
                successCallback(accel);
            }
        } else {
            start();
        }

        if (cordova.platformId === 'browser' && !eventTimerId) {
            // Start firing devicemotion events if we haven't already
            var devicemotionEvent = new Event('devicemotion');
            eventTimerId = window.setInterval(function () {
                window.dispatchEvent(devicemotionEvent);
            }, 200);
        }

        return id;
    },