Adds disclosure slides to custom decks

disclosures.js

(function ($) {
    var prefix = 'System:ds:';

    function uniqueArray(ar) {
        var j = {};

        ar.forEach(function (v) {
            j[v + '::' + typeof v] = v;
        });

        return Object.keys(j).map(function (v) {
            return j[v];
        });
    }

    function parseSlideOrder(slideOrder) {
        return slideOrder
            .split(',')
            .map(function (slide) {
                var pieces = slide.split(/_|\|/);
                return {
                    dirname: pieces[0] + '_' + pieces[1],
                    fileID: pieces[0],
                    page: parseInt(pieces[2])
                }
            });
    }

    function toSlideOrder(slides) {
        return slides.map(function(slide) {
            return slide.dirname + '|' + slide.page
        }).join(',')
    }

    function parseDisclosurePages(keywords, pageMax) {
        if (!keywords) {
            return []
        }

        return pages = keywords.split(',')
            .map(function (kw) {
                return kw.trim()
            })
            .filter(function (kw) {
                return prefix === kw.substring(0, prefix.length)
            })
            .map(function (kw) {
                return parseInt(kw.substring(prefix.length, kw.length))
            })
            .filter(function (page) {
                return page > 0 && page <= pageMax;
            });
    }

    function getFile(id) {
        for (var i = 0; i < serverJSON.files.length; i++) {
            var file = serverJSON.files[i];
            if (parseInt(file.ID) === parseInt(id)) {
                return file
            }
        }
    }

    function addDisclures(decks) {
        for (var i = 0; i < decks.length; i++) {
            var deck = decks[i];

            if (!deck.isCustom || !deck.slideOrder) {
                continue;
            }

            var slides = parseSlideOrder(deck.slideOrder);

            var fileIDs = uniqueArray(slides.map(function (slide) {
                return slide.fileID
            }));

            for (var j = 0; j < fileIDs.length; j++) {
                var file = getFile(fileIDs[j]);
                var dpages = parseDisclosurePages(file.keywords, parseInt(file.extra));

                for (var k = 0; k < dpages.length; k++) {
                    slides.push({
                        dirname: file.vUrl.split(/\/|\./)[1],
                        fileID: parseInt(file.ID),
                        page: dpages[k]
                    })
                }
            }

            deck.ID = deck.slideOrder = toSlideOrder(slides);
            deck.vNumber = slides.length
        }

        return decks
    }

    var superLoadPresentations = window.loadPresentations;
    window.loadPresentations = function(presentationsObject, searchPhrase) {
        superLoadPresentations(addDisclures(presentationsObject), searchPhrase)
    }
})(jQuery);