Created
March 5, 2019 19:55
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Final utils.js
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| import { HEROES, COMICS } from './data'; | |
| // the Knuth shuffle algorithm | |
| export function shuffle(array) { | |
| let currentIndex = array.length; | |
| let temporaryValue; | |
| let randomIndex; | |
| // While there remain elements to shuffle... | |
| while (0 !== currentIndex) { | |
| // Pick a remaining element... | |
| randomIndex = Math.floor(Math.random() * currentIndex); | |
| currentIndex -= 1; | |
| // And swap it with the current element. | |
| temporaryValue = array[currentIndex]; | |
| array[currentIndex] = array[randomIndex]; | |
| array[randomIndex] = temporaryValue; | |
| } | |
| return array; | |
| } | |
| // method to handle points calculation based on sort order as well as grouping | |
| function calculateScore(groupedHeroes, comics) { | |
| const correctOrder = HEROES.filter(hero => hero.comics === comics).sort((a, b) => | |
| a.name.toLowerCase() < b.name.toLowerCase() ? -1 : 1 | |
| ); | |
| return groupedHeroes.reduce((score, { name }, index) => { | |
| const maxPoint = HEROES.length; | |
| const heroIndex = correctOrder.findIndex(hero => hero.name === name); | |
| const penalty = heroIndex >= 0 ? Math.abs(index - heroIndex) : maxPoint; | |
| console.log({ name, points: maxPoint - penalty }); | |
| return score + (maxPoint - penalty); | |
| }, 0); | |
| } | |
| export function getTotalScore(groups, timeLeft) { | |
| const gameScore = Object.values(COMICS).reduce( | |
| (sum, comicsName) => sum + calculateScore(groups[comicsName], comicsName), | |
| 0 | |
| ); | |
| const timeBonus = getSeconds(timeLeft); | |
| return gameScore ? gameScore + timeBonus : 0; | |
| } | |
| // method to handle to the heroe cards movement | |
| export const move = (state, source, destination) => { | |
| const srcListClone = [...state[source.droppableId]]; | |
| const destListClone = | |
| source.droppableId === destination.droppableId | |
| ? srcListClone | |
| : [...state[destination.droppableId]]; | |
| const [movedElement] = srcListClone.splice(source.index, 1); | |
| destListClone.splice(destination.index, 0, movedElement); | |
| return { | |
| [source.droppableId]: srcListClone, | |
| ...(source.droppableId === destination.droppableId | |
| ? {} | |
| : { | |
| [destination.droppableId]: destListClone, | |
| }), | |
| }; | |
| }; | |
| // method to get time left | |
| export const getTimeLeft = deadline => deadline - Date.now(); | |
| // method to get time left in seconds | |
| export const getSeconds = timeLeft => Math.floor(timeLeft / 1000); | |
| // enums for representing the game state | |
| export const GAME_STATE = { | |
| READY: 'ready', | |
| PLAYING: 'playing', | |
| DONE: 'done', | |
| }; |
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