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'use strict';
var isPlainObject = require('is-plain-object').isPlainObject;
var defaults = require('object.defaults/immutable');
module.exports = function (obj, fn, opts) {
if (!isObject(obj)) {
return;
}
if (typeof fn !== 'function') {
return;
}
if (!isPlainObject(opts)) {
opts = {};
}
forEachChild(obj, '', fn, 0, opts);
};
function forEachChild(node, baseKey, fn, depth, opts) {
var keys = Object.keys(node);
if (typeof opts.sort === 'function') {
var sortedKeys = opts.sort(keys);
if (Array.isArray(sortedKeys)) {
keys = sortedKeys;
}
}
depth += 1;
for (var i = 0, n = keys.length; i < n; i++) {
var key = keys[i];
var keyChain = baseKey + '.' + key;
var value = node[key];
var nodeInfo = defaults(opts);
nodeInfo.name = key;
nodeInfo.index = i;
nodeInfo.count = n;
nodeInfo.depth = depth;
nodeInfo.parent = node;
var notDigg = fn(value, keyChain.slice(1), nodeInfo);
if (notDigg || !isPlainObject(value)) {
continue;
}
forEachChild(value, keyChain, fn, depth, opts);
}
}
function isObject(v) {
return Object.prototype.toString.call(v) === '[object Object]';
}
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