58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
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'use strict';
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var assert = require('assert');
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var utils = require('../utils');
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/**
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* Get all keys.
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*
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* **NOTE**
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* Building an in-memory array of all keys may be expensive.
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* Consider using `iterateKeys` instead.
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*
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* @param {Object} filter An optional filter object with the following
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* properties:
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* - `match` - glob string to use to filter returned keys, e.g. 'userid.*'
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* @param {Object} options
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* @callback callback
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* @param {Error=} err
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* @param {[String]} keys The list of keys.
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*
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* @promise
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*
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* @header KVAO.keys(filter, callback)
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*/
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module.exports = function keyValueKeys(filter, options, callback) {
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if (callback === undefined) {
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if (typeof options === 'function') {
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callback = options;
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options = undefined;
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} else if (options === undefined && typeof filter === 'function') {
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callback = filter;
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filter = undefined;
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}
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}
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filter = filter || {};
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options = options || {};
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assert(typeof filter === 'object', 'filter must be an object');
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assert(typeof options === 'object', 'options must be an object');
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callback = callback || utils.createPromiseCallback();
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var iter = this.iterateKeys(filter, options);
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var keys = [];
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iter.next(onNextKey);
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function onNextKey(err, key) {
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if (err) return callback(err);
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if (key === undefined) return callback(null, keys);
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keys.push(key);
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iter.next(onNextKey);
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}
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return callback.promise;
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};
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