1 files changed, 23 insertions, 0 deletions
diff --git a/src/lib/shared/group-by-category.ts b/src/lib/shared/group-by-category.ts
new file mode 100644
index 0000000..e9b0acd
--- /dev/null
+++ b/src/lib/shared/group-by-category.ts
@@ -0,0 +1,23 @@
+export function groupByCategory<
+	TItem extends { categoryName: string | null },
+	TCategory extends { name: string },
+>(items: TItem[], categories: TCategory[]): [string, TItem[]][] {
+	const groups = new Map<string, TItem[]>();
+	for (const item of items) {
+		const key = item.categoryName ?? 'Non catégorisé';
+		const list = groups.get(key);
+		if (list) list.push(item);
+		else groups.set(key, [item]);
+	}
+
+	const result: [string, TItem[]][] = [];
+	for (const cat of categories) {
+		const list = groups.get(cat.name);
+		if (list?.length) result.push([cat.name, list]);
+	}
+	const uncategorized = groups.get('Non catégorisé');
+	if (uncategorized?.length) {
+		result.unshift(['Non catégorisé', uncategorized]);
+	}
+	return result;
+}