Function formatAsciiTree

packages/utils/src/lib/text-formats/ascii/tree.ts:12–36

(tree: Tree)

const COL_GAP = 2;

export function formatAsciiTree(tree: Tree): string {
  const nodes = flatten(tree.root);
  const maxWidth = Math.max(
    ...nodes.map(({ node, level }) => level * INDENT_CHARS + node.name.length),
  );
  const keysMaxWidths =
    tree.type === 'coverage'
      ? {}
      : nodes.reduce<Record<string, number>>(
          (acc, { node }) => ({
            ...acc,
            ...Object.fromEntries(
              Object.entries(node.values ?? {}).map(([key, value]) => [
                key,
                Math.max(acc[key] ?? 0, `${value}`.length),
              ]),
            ),
          }),
          {},
        );

  return formatTreeNode(tree.root, '', maxWidth, keysMaxWidths)
    .map(line => `${line}\n`)
    .join('');
}

function formatTreeNode(
  node: TreeNode,