106 lines
2.5 KiB
JavaScript
106 lines
2.5 KiB
JavaScript
'use strict';
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var _require = require('../helpers/is'),
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isArray = _require.isArray,
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isObject = _require.isObject;
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var nestedValue = require('../helpers/nestedValue');
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var buildKeyPathMap = function buildKeyPathMap(items) {
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var keyPaths = {};
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items.forEach(function (item, index) {
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function buildKeyPath(val, keyPath) {
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if (isObject(val)) {
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Object.keys(val).forEach(function (prop) {
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buildKeyPath(val[prop], keyPath + '.' + prop);
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});
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} else if (isArray(val)) {
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val.forEach(function (v, i) {
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buildKeyPath(v, keyPath + '.' + i);
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});
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}
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keyPaths[keyPath] = val;
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}
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buildKeyPath(item, index);
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});
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return keyPaths;
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};
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module.exports = function pluck(value, key) {
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if (value.indexOf('*') !== -1) {
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var keyPathMap = buildKeyPathMap(this.items);
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var keyMatches = [];
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if (key !== undefined) {
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var keyRegex = new RegExp('0.' + key, 'g');
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var keyNumberOfLevels = ('0.' + key).split('.').length;
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Object.keys(keyPathMap).forEach(function (k) {
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var matchingKey = k.match(keyRegex);
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if (matchingKey) {
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var match = matchingKey[0];
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if (match.split('.').length === keyNumberOfLevels) {
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keyMatches.push(keyPathMap[match]);
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}
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}
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});
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}
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var valueMatches = [];
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var valueRegex = new RegExp('0.' + value, 'g');
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var valueNumberOfLevels = ('0.' + value).split('.').length;
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Object.keys(keyPathMap).forEach(function (k) {
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var matchingValue = k.match(valueRegex);
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if (matchingValue) {
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var match = matchingValue[0];
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if (match.split('.').length === valueNumberOfLevels) {
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valueMatches.push(keyPathMap[match]);
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}
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}
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});
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if (key !== undefined) {
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var collection = {};
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this.items.forEach(function (item, index) {
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collection[keyMatches[index] || ''] = valueMatches;
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});
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return new this.constructor(collection);
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}
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return new this.constructor([valueMatches]);
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}
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if (key !== undefined) {
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var _collection = {};
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this.items.forEach(function (item) {
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if (nestedValue(item, value) !== undefined) {
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_collection[item[key] || ''] = nestedValue(item, value);
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} else {
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_collection[item[key] || ''] = null;
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}
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});
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return new this.constructor(_collection);
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}
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return this.map(function (item) {
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if (nestedValue(item, value) !== undefined) {
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return nestedValue(item, value);
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}
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return null;
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});
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}; |