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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
import { createDirectoryNode } from "./utils";
import type { TreeDirectory, TreeNode } from "./types";
/**
* Take an existing source tree, and return a new one with collapsed nodes.
*/
function _collapseTree(node: TreeNode, depth: number): TreeNode {
// Node is a folder.
if (node.type === "directory") {
if (!Array.isArray(node.contents)) {
console.log(`Expected array at: ${node.path}`);
}
// Node is not a (1) thread and (2) root/domain node,
// and only contains 1 item.
if (depth > 2 && node.contents.length === 1) {
const next = node.contents[0];
// Do not collapse if the next node is a leaf node.
if (next.type === "directory") {
if (!Array.isArray(next.contents)) {
console.log(
`Expected array at: ${next.name} -- ${
node.name
} -- ${JSON.stringify(next.contents)}`
);
}
const name = `${node.name}/${next.name}`;
const nextNode = createDirectoryNode(name, next.path, next.contents);
return _collapseTree(nextNode, depth + 1);
}
}
// Map the contents.
return createDirectoryNode(
node.name,
node.path,
node.contents.map(next => _collapseTree(next, depth + 1))
);
}
// Node is a leaf, not a folder, do not modify it.
return node;
}
export function collapseTree(node: TreeDirectory): TreeDirectory {
const tree = _collapseTree(node, 0);
return ((tree: any): TreeDirectory);
}
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