feat: release version 1.0.7

src/lib/data/song-catalog.ts

@@ -0,0 +1,56 @@
+export type SongSort = 'title' | 'difficulty-asc' | 'difficulty-desc';
+
+export type SongChartSummary = {
+  songId: string;
+  title: string;
+  difficulty: string;
+  difficultyLevel?: number | null;
+  scoreCalibrationSource?: 'measured' | 'local-estimated-v1' | string;
+};
+
+export type SongOption = {
+  id: string;
+  title: string;
+  difficultyLevel: number | null;
+};
+
+const englishTitleCollator = new Intl.Collator('en', {
+  sensitivity: 'base',
+  numeric: true
+});
+
+function normalizedSearch(value: string): string {
+  return value.normalize('NFKD').toLocaleLowerCase('en').replace(/[^a-z0-9]+/g, ' ').trim();
+}
+
+export function songOptions(
+  charts: readonly SongChartSummary[],
+  difficulty: string,
+  query = '',
+  sort: SongSort = 'title'
+): SongOption[] {
+  const levelBySongId = new Map(charts
+    .filter((chart) => chart.difficulty === difficulty)
+    .map((chart) => [chart.songId, chart.difficultyLevel ?? null]));
+  const options = Array.from(new Map(charts.map((chart) => [chart.songId, {
+    id: chart.songId,
+    title: chart.title,
+    difficultyLevel: levelBySongId.get(chart.songId) ?? null
+  }])).values());
+  const search = normalizedSearch(query);
+  const filtered = search
+    ? options.filter((song) => normalizedSearch(`${song.title} ${song.id}`).includes(search))
+    : options;
+  const titleOrder = (left: SongOption, right: SongOption) =>
+    englishTitleCollator.compare(left.title, right.title) || left.id.localeCompare(right.id);
+
+  return filtered.sort((left, right) => {
+    if (sort === 'title') return titleOrder(left, right);
+    if (left.difficultyLevel === null) return right.difficultyLevel === null ? titleOrder(left, right) : 1;
+    if (right.difficultyLevel === null) return -1;
+    const leftLevel = left.difficultyLevel;
+    const rightLevel = right.difficultyLevel;
+    const levelOrder = sort === 'difficulty-desc' ? rightLevel - leftLevel : leftLevel - rightLevel;
+    return levelOrder || titleOrder(left, right);
+  });
+}