function Controller()

in kahuna/public/js/components/gr-downloader/gr-downloader.js [17:98]
62 lines of code
15 McCabe index (conditional complexity)

  function Controller($window, $q, $scope, inject$, imageDownloadsService) {

    let ctrl = this;

    ctrl.$onInit = () => {

      ctrl.canDownloadCrop = $window._clientConfig.canDownloadCrop;
      const restrictDownload = $window._clientConfig.restrictDownload;

      ctrl.imagesArray = () => Array.isArray(ctrl.images) ?
        ctrl.images : Array.from(ctrl.images.values());
      ctrl.imageCount = () => ctrl.imagesArray().length;

      ctrl.downloadableImagesArray = () => restrictDownload ?
        ctrl.imagesArray().filter(({data, links}) =>
          links?.some(({rel}) => rel === 'download') && data.softDeletedMetadata === undefined) :
        ctrl.imagesArray();

      $scope.$watch('ctrl.images', function () {
        ctrl.singleImageSelected = ctrl.imageCount() === 1;
        ctrl.multipleSelectedAllValid = ctrl.imageCount() > 1;

        if (restrictDownload) {
          const totalSelectedImages = ctrl.imageCount();
          const selectedNonDownloadableImages = ctrl.imagesArray().filter(({data, links}) =>
            !links?.some(({rel}) => rel === 'download') || data.softDeletedMetadata !== undefined);
          const singleImageSelected = totalSelectedImages === 1;
          const multipleImagesSelected = totalSelectedImages > 1;

          ctrl.singleImageSelected = singleImageSelected && ctrl.imagesArray()[0].links?.some(({rel}) => rel === 'download')
            && ctrl.imagesArray()[0].data.softDeletedMetadata === undefined;

          ctrl.singleSelectedInvalid = singleImageSelected && selectedNonDownloadableImages.length === 1;

          ctrl.multipleSelectedAllValid = multipleImagesSelected && selectedNonDownloadableImages.length < 1;
          ctrl.multipleSelectedNoneValid = multipleImagesSelected && totalSelectedImages === selectedNonDownloadableImages.length;
          ctrl.multipleSelectedSomeValid = multipleImagesSelected && !(ctrl.multipleSelectedNoneValid || ctrl.multipleSelectedAllValid);
        }
      });

      ctrl.isDeleted = ctrl.singleImageSelected && ctrl.images[0].data.softDeletedMetadata !== undefined;

      const uris$ = imageDownloadsService.getDownloads(ctrl.imagesArray()[0]);

      inject$($scope, uris$, ctrl, 'firstImageUris');

      ctrl.download = (downloadKey) => {

        ctrl.downloading = true;

        const downloads$ = imageDownloadsService.download$(
          ctrl.downloadableImagesArray(),
          downloadKey || 'downloadUri'
        );

        downloads$.subscribe((zip) => {
            zip.generateAsync({type: 'uint8array'}).then(file => {
              const blob = new Blob([file], {type: 'application/zip'});

              const createDownload = () => {
                const url = $window.URL.createObjectURL(blob);
                $window.location = url;
                $window.URL.revokeObjectURL(url);
              };
              createDownload();
              ctrl.downloading = false;
              $scope.$apply();
            });
          },
          (e) => {
            const message = [
              'Something has gone wrong with your download!', e
            ].join('\n');

            $window.alert(message);

            ctrl.downloading = false;
            throw e;
          });
      };
    };
  }]);