Update files

packages/app/src/utils/markdown-list.ts

@@ -0,0 +1,87 @@
+type MarkdownNode = {
+  type?: string;
+  index?: number;
+  markup?: string;
+  attributes?: {
+    start?: number | string;
+  };
+  children?: MarkdownNode[];
+};
+
+const LIST_BULLET = "•";
+const DEFAULT_ORDERED_LIST_MARKUP = ".";
+
+function toParentNodes(parent: unknown): MarkdownNode[] {
+  if (Array.isArray(parent)) {
+    return parent;
+  }
+
+  if (parent && typeof parent === "object") {
+    return [parent as MarkdownNode];
+  }
+
+  return [];
+}
+
+function getNearestListParent(parent: unknown): MarkdownNode | undefined {
+  return toParentNodes(parent).find(
+    (ancestor) =>
+      ancestor?.type === "ordered_list" || ancestor?.type === "bullet_list"
+  );
+}
+
+function getOrderedListItemIndex(node: MarkdownNode, listParent: MarkdownNode): number {
+  if (typeof node.index === "number" && Number.isFinite(node.index) && node.index >= 0) {
+    return node.index;
+  }
+
+  if (Array.isArray(listParent.children)) {
+    const fallbackIndex = listParent.children.indexOf(node);
+    if (fallbackIndex >= 0) {
+      return fallbackIndex;
+    }
+  }
+
+  return 0;
+}
+
+function parseOrderedListStart(node: MarkdownNode): number {
+  const rawStart = node.attributes?.start;
+  if (typeof rawStart === "number" && Number.isFinite(rawStart)) {
+    return rawStart;
+  }
+
+  if (typeof rawStart === "string") {
+    const parsed = Number.parseInt(rawStart, 10);
+    if (Number.isFinite(parsed)) {
+      return parsed;
+    }
+  }
+
+  return 1;
+}
+
+export function getMarkdownListMarker(node: MarkdownNode, parent: unknown): {
+  isOrdered: boolean;
+  marker: string;
+} {
+  const listParent = getNearestListParent(parent);
+  if (!listParent || listParent.type !== "ordered_list") {
+    return {
+      isOrdered: false,
+      marker: LIST_BULLET,
+    };
+  }
+
+  const orderedIndex = getOrderedListItemIndex(node, listParent);
+  const orderedStart = parseOrderedListStart(listParent);
+  const orderedMarkup =
+    typeof node.markup === "string" && node.markup.length > 0
+      ? node.markup
+      : DEFAULT_ORDERED_LIST_MARKUP;
+
+  return {
+    isOrdered: true,
+    marker: `${orderedStart + orderedIndex}${orderedMarkup}`,
+  };
+}