2 files changed, 125 insertions, 0 deletions
diff --git a/src/static/js/client/gallery-style-selector.js b/src/static/js/client/gallery-style-selector.js
new file mode 100644
index 00000000..c7086eae
--- /dev/null
+++ b/src/static/js/client/gallery-style-selector.js
@@ -0,0 +1,123 @@
+/* eslint-env browser */
+
+import {cssProp} from '../client-util.js';
+
+import {stitchArrays} from '../../shared-util/sugar.js';
+
+export const info = {
+  id: 'galleryStyleSelectorInfo',
+
+  selectors: null,
+  sections: null,
+
+  selectorStyleInputs: null,
+  selectorStyleInputStyles: null,
+
+  selectorReleaseItems: null,
+  selectorReleaseItemStyles: null,
+
+  selectorCountAll: null,
+  selectorCountFiltered: null,
+  selectorCountFilteredCount: null,
+  selectorCountNone: null,
+};
+
+export function getPageReferences() {
+  info.selectors =
+    Array.from(document.querySelectorAll('.gallery-style-selector'));
+
+  info.sections =
+    info.selectors
+      .map(selector => selector.closest('section'));
+
+  info.selectorStyleInputs =
+    info.selectors
+      .map(selector => selector.querySelectorAll('.styles input'))
+      .map(inputs => Array.from(inputs));
+
+  info.selectorStyleInputStyles =
+    info.selectorStyleInputs
+      .map(inputs => inputs
+        .map(input => input.closest('label').dataset.style));
+
+  info.selectorReleaseItems =
+    info.sections
+      .map(section => section.querySelectorAll('.grid-item'))
+      .map(items => Array.from(items));
+
+  info.selectorReleaseItemStyles =
+    info.selectorReleaseItems
+      .map(items => items
+        .map(item => item.dataset.style));
+
+  info.selectorCountAll =
+    info.selectors
+      .map(selector => selector.querySelector('.count.all'));
+
+  info.selectorCountFiltered =
+    info.selectors
+      .map(selector => selector.querySelector('.count.filtered'));
+
+  info.selectorCountFilteredCount =
+    info.selectorCountFiltered
+      .map(selector => selector.querySelector('span'));
+
+  info.selectorCountNone =
+    info.selectors
+      .map(selector => selector.querySelector('.count.none'));
+}
+
+export function addPageListeners() {
+  for (const index of info.selectors.keys()) {
+    for (const input of info.selectorStyleInputs[index]) {
+      input.addEventListener('input', () => updateVisibleReleases(index));
+    }
+  }
+}
+
+function updateVisibleReleases(index) {
+  const inputs = info.selectorStyleInputs[index];
+  const inputStyles = info.selectorStyleInputStyles[index];
+
+  const selectedStyles =
+    stitchArrays({input: inputs, style: inputStyles})
+      .filter(({input}) => input.checked)
+      .map(({style}) => style);
+
+  const releases = info.selectorReleaseItems[index];
+  const releaseStyles = info.selectorReleaseItemStyles[index];
+
+  let visible = 0;
+
+  stitchArrays({
+    release: releases,
+    style: releaseStyles,
+  }).forEach(({release, style}) => {
+      if (selectedStyles.includes(style)) {
+        release.classList.remove('hidden-by-style-mismatch');
+        visible++;
+      } else {
+        release.classList.add('hidden-by-style-mismatch');
+      }
+    });
+
+  const countAll = info.selectorCountAll[index];
+  const countFiltered = info.selectorCountFiltered[index];
+  const countFilteredCount = info.selectorCountFilteredCount[index];
+  const countNone = info.selectorCountNone[index];
+
+  if (visible === releases.length) {
+    cssProp(countAll, 'display', null);
+    cssProp(countFiltered, 'display', 'none');
+    cssProp(countNone, 'display', 'none');
+  } else if (visible === 0) {
+    cssProp(countAll, 'display', 'none');
+    cssProp(countFiltered, 'display', 'none');
+    cssProp(countNone, 'display', null);
+  } else {
+    cssProp(countAll, 'display', 'none');
+    cssProp(countFiltered, 'display', null);
+    cssProp(countNone, 'display', 'none');
+    countFilteredCount.innerHTML = visible;
+  }
+}
diff --git a/src/static/js/client/index.js b/src/static/js/client/index.js
index 9d7eae86..4ca4700e 100644
--- a/src/static/js/client/index.js
+++ b/src/static/js/client/index.js
@@ -12,6 +12,7 @@ import * as cssCompatibilityAssistantModule from './css-compatibility-assistant.
 import * as datetimestampTooltipModule from './datetimestamp-tooltip.js';
 import * as draggedLinkModule from './dragged-link.js';
 import * as expandableGallerySectionModule from './expandable-gallery-section.js';
+import * as galleryStyleSelectorModule from './gallery-style-selector.js';
 import * as hashLinkModule from './hash-link.js';
 import * as hoverableTooltipModule from './hoverable-tooltip.js';
 import * as imageOverlayModule from './image-overlay.js';
@@ -36,6 +37,7 @@ export const modules = [
   datetimestampTooltipModule,
   draggedLinkModule,
   expandableGallerySectionModule,
+  galleryStyleSelectorModule,
   hashLinkModule,
   hoverableTooltipModule,
   imageOverlayModule,