| 1 | 'use strict'; |
| 2 | |
| 3 | /* eslint-disable react-internal/safe-string-coercion */ |
| 4 | |
| 5 | //------------------------------------------------------------------------------ |
| 6 | // Public Interface |
| 7 | //------------------------------------------------------------------------------ |
| 8 | |
| 9 | /** |
| 10 | * A generator for unique ids. |
| 11 | */ |
| 12 | class IdGenerator { |
| 13 | /** |
| 14 | * @param {string} prefix Optional. A prefix of generated ids. |
| 15 | */ |
| 16 | constructor(prefix) { |
| 17 | this.prefix = String(prefix); |
| 18 | this.n = 0; |
| 19 | } |
| 20 | |
| 21 | /** |
| 22 | * Generates id. |
| 23 | * @returns {string} A generated id. |
| 24 | */ |
| 25 | next() { |
| 26 | this.n = (1 + this.n) | 0; |
| 27 | |
| 28 | /* c8 ignore start */ |
| 29 | if (this.n < 0) { |
| 30 | this.n = 1; |
| 31 | } /* c8 ignore stop */ |
| 32 | |
| 33 | return this.prefix + this.n; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | module.exports = IdGenerator; |