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"use strict";
exports.parse = (lines) => {
function addHiddenProperties(scope, props) {
for (const p of Object.keys(props)) {
Object.defineProperty(scope, p, { enumerable: false, value: props[p] });
}
}
const TreeNode = function (data, depth) {
this.parent = null;
addHiddenProperties(this, {
data,
depth,
parent: null,
children: [],
});
this[data || 'root'] = this.children;
};
TreeNode.prototype.toString = function () {
return JSON.stringify(this.children);
};
const tree = new TreeNode(null, -1);
const levels = [tree];
function countTabs(line) {
let count = 0;
for (const i of Object.keys(line)) {
const ch = line[i];
if ((ch === '\t')) {
count += 1;
}
else if (/[^\s]/.test(ch)) {
return count;
}
}
return -1; // no content
}
for (const i of Object.keys(lines)) {
const line = lines[i];
const tabcount = countTabs(line);
if (tabcount >= 0) {
// then add node to tree
while (tabcount - levels[levels.length - 1].depth <= 0) {
levels.pop();
}
const depth = levels.length - 1;
const node = new TreeNode(line.substring(tabcount), depth);
node.parent = levels[levels.length - 1];
node.parent.children.push(node);
levels.push(node);
}
}
return tree;
};
exports.traverse = (tree, cb) => {
function _traverse(node) {
cb(node);
for (const i of node.children.length) {
_traverse(node.children[i]);
}
}
for (const i of tree.children) {
_traverse(tree.children[i]);
}
};
exports.print = (tree) => {
exports.traverse(tree, (node) => {
let str = '';
for (let i = 0; i < node.depth; i++) {
str += '\t';
}
str += node.data;
});
};
exports.toJSON = (tree) => {
return JSON.stringify(tree.children);
};
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