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- 'use strict';
-
- var values = require('../helpers/values');
- var nestedValue = require('../helpers/nestedValue');
-
- module.exports = function where(key, operator, value) {
- var comparisonOperator = operator;
- var comparisonValue = value;
-
- var items = values(this.items);
-
- if (operator === undefined || operator === true) {
- return new this.constructor(items.filter(function (item) {
- return nestedValue(item, key);
- }));
- }
-
- if (operator === false) {
- return new this.constructor(items.filter(function (item) {
- return !nestedValue(item, key);
- }));
- }
-
- if (value === undefined) {
- comparisonValue = operator;
- comparisonOperator = '===';
- }
-
- var collection = items.filter(function (item) {
- switch (comparisonOperator) {
- case '==':
- return nestedValue(item, key) === Number(comparisonValue) || nestedValue(item, key) === comparisonValue.toString();
-
- default:
- case '===':
- return nestedValue(item, key) === comparisonValue;
-
- case '!=':
- case '<>':
- return nestedValue(item, key) !== Number(comparisonValue) && nestedValue(item, key) !== comparisonValue.toString();
-
- case '!==':
- return nestedValue(item, key) !== comparisonValue;
-
- case '<':
- return nestedValue(item, key) < comparisonValue;
-
- case '<=':
- return nestedValue(item, key) <= comparisonValue;
-
- case '>':
- return nestedValue(item, key) > comparisonValue;
-
- case '>=':
- return nestedValue(item, key) >= comparisonValue;
- }
- });
-
- return new this.constructor(collection);
- };
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