New: Faster searching of existing series

frontend/src/Components/Page/Header/fuse.worker.js

@@ -0,0 +1,63 @@
+import Fuse from 'fuse.js';
+
+const fuseOptions = {
+  shouldSort: true,
+  includeMatches: true,
+  threshold: 0.3,
+  location: 0,
+  distance: 100,
+  maxPatternLength: 32,
+  minMatchCharLength: 1,
+  keys: [
+    'title',
+    'alternateTitles.title',
+    'tags.label'
+  ]
+};
+
+function getSuggestions(series, value) {
+  const limit = 10;
+  let suggestions = [];
+
+  if (value.length === 1) {
+    for (let i = 0; i < series.length; i++) {
+      const s = series[i];
+      if (s.firstCharacter === value.toLowerCase()) {
+        suggestions.push({
+          item: series[i],
+          indices: [
+            [0, 0]
+          ],
+          matches: [
+            {
+              value: s.title,
+              key: 'title'
+            }
+          ],
+          arrayIndex: 0
+        });
+        if (suggestions.length > limit) {
+          break;
+        }
+      }
+    }
+  } else {
+    const fuse = new Fuse(series, fuseOptions);
+    suggestions = fuse.search(value, { limit });
+  }
+
+  return suggestions;
+}
+
+self.addEventListener('message', (e) => {
+  if (!e) {
+    return;
+  }
+
+  const {
+    series,
+    value
+  } = e.data;
+
+  self.postMessage(getSuggestions(series, value));
+});