57 lines
976 B
JavaScript
57 lines
976 B
JavaScript
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import generateRandomString from 'croodle/utils/generate-passphrase';
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export default class {
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constructor() {
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this.reset();
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}
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/**
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* Returns an unique identifier.
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*
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* @method fetch
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* @param {Object} data Records attributes hash
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* @return {String} Unique identifier
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* @public
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*/
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fetch() {
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let id;
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while (id === undefined) {
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let randomString = generateRandomString(10);
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if (this._ids[randomString] === undefined) {
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id = randomString;
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}
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}
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this._ids[id] = true;
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return id;
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}
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/**
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* Register an identifier.
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* Must throw if identifier is already used.
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*
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* @method set
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* @param {String|Number} id
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* @public
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*/
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set(id) {
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if (typeof this._ids[id] !== 'undefined') {
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throw new Error(`Id {id} is already used.`);
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}
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this._ids[id] = true;
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}
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/**
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* Reset identity manager.
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*
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* @method reset
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* @public
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*/
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reset() {
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this._ids = {};
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}
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}
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