Created
July 13, 2020 15:49
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| import { capitalize, downTo } from "./helpers"; | |
| export class Bottles { | |
| song() { | |
| return this.verses(99, 0); | |
| } | |
| verses(from, to) { | |
| return downTo(from, to) | |
| .map((i) => this.verse(i)) | |
| .join("\n"); | |
| } | |
| verse(number) { | |
| return capitalize( | |
| `${this.firstValue(number)} of beer on the wall, ${this.firstValue( | |
| number | |
| )} of beer.\n${this.action(number)}, ${this.lastValue( | |
| number | |
| )} of beer on the wall.\n` | |
| ); | |
| } | |
| action(number) { | |
| if (number === 1) { | |
| return "Take it down and pass it around"; | |
| } | |
| if (number > 1) { | |
| return "Take one down and pass it around"; | |
| } | |
| return "Go to the store and buy some more"; | |
| } | |
| firstValue(number) { | |
| if (number === 0) { | |
| return "no more bottles"; | |
| } | |
| if (number === 1) { | |
| return "1 bottle"; | |
| } | |
| return `${number} bottles`; | |
| } | |
| lastValue(number) { | |
| if (number === 0) { | |
| return "99 bottles"; | |
| } | |
| if (number - 1 === 0) { | |
| return "no more bottles"; | |
| } | |
| if (number - 1 === 1) { | |
| return "1 bottle"; | |
| } | |
| return `${number - 1} bottles`; | |
| } | |
| } |
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