fs-iterator/dist/esm/PathStack.js

A file system iterator with filter and asyncIterator iterafaces. Supports Node 0.10 and above

import FIFO from 'fifo';
import depthFirst from './depthFirst/index.js';
function PathStack() {
    this.stack = new FIFO();
    this.length = 0;
}
PathStack.prototype.push = function push(item) {
    if (!item) throw new Error('item is mandatory');
    if (item.files && !item.files.length) throw new Error('item files must have a length');
    this.stack.push(item);
    this.length += item.files ? item.files.length : 1;
    return this;
};
PathStack.prototype.pop = function pop() {
    if (!this.stack.length) throw new Error('Stack is empty');
    const item = this.stack.last();
    this.length--;
    // just a simple item
    if (!item.files) return depthFirst.bind(null, this.stack.pop());
    // resuse this item
    if (item.files.length > 1) return depthFirst.bind(null, {
        path: item.path,
        basename: item.files.pop(),
        depth: item.depth
    });
    // done with this item
    item.basename = item.files.pop();
    return depthFirst.bind(null, this.stack.pop());
};
PathStack.prototype.last = function last() {
    return this.stack.last();
};
export default PathStack;