squarenotsquare/squarenotsquare/src/realm/repos/ScoreRepo.js

import {ScoreEntity} from '../entities/Score';
import 'react-native-get-random-values';
import { v4 as uuidv4 } from 'uuid';

export default class ScoreRepo {
  realmDB = null;

  constructor(db) {
    this.realmDB = db;
    this.scoreCache = [];
  }

  updateScoreCache = (newScore) => {
    this.scoreCache.push(newScore);
    this.scoreCache.sort((a, b) => b.value - a.value);

    if (this.scoreCache.length > 99) {
      this.scoreCache = this.scoreCache.slice(99, this.scoreCache.length - 1);
    }
  }

  createScore = (user, score) => {
    let scoreID = uuidv4();

    let newScore = {
      id: scoreID,
      user: user,
      value: score
    };

    this.updateScoreCache(newScore);

    this.realmDB.write(() => {
      this.realmDB.create( ScoreEntity.name, newScore, true);
    });
  }

  getHighScores = () => {
    let score = this.realmDB.objects(ScoreEntity.name).sorted('value', true);
    let highScores = [];
    let i = 0;
    score.forEach((row) => {
      if (i > 99){
        return highScores;
      }
      highScores.push({user: row.user, value: row.value});
    });
    return highScores;
  }

  loadCache = () => {
    this.scoreCache = this.getHighScores();
  }

  getCachedScores = () => {
    return this.scoreCache;
  }
}