photos.init = function()

in modules/renderer/photos.js [171:231]
48 lines of code
22 McCabe index (conditional complexity)

    photos.init = function() {
        var hash = utilStringQs(window.location.hash);
        if (hash.photo_dates) {
            // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
            var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
            this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
            this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
        }
        if (hash.photo_username) {
            this.setUsernameFilter(hash.photo_username, false);
        }
        if (hash.photo_overlay) {
            // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`

            var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
            hashOverlayIDs.forEach(function(id) {
                var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
                if (layer && !layer.enabled()) layer.enabled(true);
            });
        }
        if (hash.photo) {
            // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`

            var photoIds = hash.photo.replace(/;/g, ',').split(',');
            var photoId = photoIds.length && photoIds[0].trim();
            var results = /(.*)\/(.*)/g.exec(photoId);
            if (results && results.length >= 3) {
                var serviceId = results[1];
                var photoKey = results[2];
                var service = services[serviceId];
                if (service && service.ensureViewerLoaded) {

                    // if we're showing a photo then make sure its layer is enabled too
                    var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
                    if (layer && !layer.enabled()) layer.enabled(true);

                    var baselineTime = Date.now();

                    service.on('loadedImages.rendererPhotos', function() {
                        // don't open the viewer if too much time has elapsed
                        if (Date.now() - baselineTime > 45000) {
                            service.on('loadedImages.rendererPhotos', null);
                            return;
                        }

                        if (!service.cachedImage(photoKey)) return;

                        service.on('loadedImages.rendererPhotos', null);
                        service.ensureViewerLoaded(context)
                            .then(function() {
                                service
                                    .selectImage(context, photoKey)
                                    .showViewer(context);
                            });
                    });
                }
            }
        }

        context.layers().on('change.rendererPhotos', updateStorage);
    };