src/components/Scoreboard/Scoreboard.js


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import React, { useEffect, useState } from 'react';

import { makeStyles } from "@material-ui/core/styles";

import { get } from "../../requests";

import SmartList from "../SmartList/SmartList";
import SolutionCard from "../SolutionCard/SolutionCard";
import Loading from "../Loading/Loading";


const useStyles = makeStyles(theme => ({
  cell: {
    display: 'flex',
    justifyContent: 'center',
    padding: theme.spacing(4),

    '& .MuiCard-root': {
      width: '30%',
    }
  }
}));

const Scoreboard = () => {
  const classes = useStyles();
  const [solutions, setSolutions] = useState([]);

  const updateSolutions = () => {
    get('scoreboard/').then(response => {
      setTimeout(() => {
        setSolutions(response.data);
      }, 300);
    });
  };

  const removeSolution = (id) => {
    setSolutions(solutions.filter((solution => solution.id !== id)));
  };

  useEffect(() => {
    updateSolutions();
  }, []);

  const renderItem = ({ index, style }) => {
    return (
      <div style={style} className={classes.cell}>
        <SolutionCard data={solutions[index]} removeThisCard={removeSolution}/>
      </div>
    )
  };


  return (solutions.length === 0) ?
    <div className={classes.cell}>
      <Loading/>
    </div>
    :
    <SmartList
      cellHeight={300}
      itemCount={solutions.length}
      renderItem={renderItem}
    />
};


export default Scoreboard;