how_much_netflix_and_export.js

// A script that looks through your Netflix viewing activity and
// tallys up how much time you've spent watching Netflix.
// And then it exports to a json file.
//
// INSTRUCTIONS TO USE:
// Open https://www.netflix.com/WiViewingActivity and the developer console
// Copy and paste this script into the developer console and press enter
//
(function () {
    var ex = function (data, filename) {
        if (typeof data === "object") {	
            data = JSON.stringify(data, undefined, 4)	
        }

        var blob = new Blob([data], {
                type: 'text/json'
            }),
            e = document.createEvent('MouseEvents'),
            a = document.createElement('a')

        a.download = filename
        a.href = window.URL.createObjectURL(blob)
        a.dataset.downloadurl = ['text/json', a.download, a.href].join(':')
        e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
        a.dispatchEvent(e)
    }

    var fetchAllViewedItems = function () {
        var deferred = jQuery.Deferred();
        var viewedItems = [];
        (function fetchPage(page) {
            data = netflix.reactContext.models.serverDefs.data;
            url = data.SHAKTI_API_ROOT + '/' + data.BUILD_IDENTIFIER;
            jQuery.getJSON(url + '/viewingactivity?pg=' + page).done(function (json) {
                viewedItems = viewedItems.concat(json.viewedItems);
                console.log('Fetched %s viewed items', viewedItems.length);
                if (json.viewedItems.length == json.size) {
                    fetchPage(++page);
                } else {
                    deferred.resolve(viewedItems);
                }
            }).fail(deferred.reject);
        })(0);
        return deferred.promise();
    };

    fetchAllViewedItems().then(function (viewedItems) {
        var totalTime = viewedItems.reduce(function (runningTotal, viewedItem) {
            return runningTotal + viewedItem.bookmark;
        }, 0);

        var days = Math.floor(totalTime / 60 / 60 / 24);
        var hours = Math.floor((totalTime / 60 / 60) % 24);
        var minutes = Math.round((totalTime / 60) % 60);

        console.log('According to your viewing history, you have cumulatively watched %i days, %i hours and %i minutes of Netflix', days, hours, minutes);

        ex(viewedItems, "netflix-history.json");
    });
})();