public/subjects/is-winner

Is Winner

Instructions

Create a function named isWinner which accepts a string representing the name of a country. It should use the winners "API" to return a resolved Promise with an appropriate string.

The strings which can be returned are listed below. You'll need to replace "Country" with the country named which is passed to isWinner:

• "Country never was a winner": The country has never won a FIFA world cup.

• "Country is not what we are looking for because of the continent": The country is not from the european continent.

• "Country is not what we are looking for because of the number of times it was champion": The country won the FIFA world cup fewer than 3 times.

• "Country won the FIFA World Cup in <years> winning by <results>": with the following format:

  • <years>: "1000, 1004, 1008"
  • <results>: "4-3, 5-2, 1-0"

Code provided

The provided code will be added to your solution, and does not need to be submitted.

const db = (() => {
  //countries that won the FIFA World Cup
  const countries = [
    { id: 1, name: 'Brazil', continent: 'South America' },
    { id: 2, name: 'Germany', continent: 'Europe' },
    { id: 3, name: 'Italy', continent: 'Europe' },
    { id: 4, name: 'Argentina', continent: 'South America' },
    { id: 5, name: 'France', continent: 'Europe' },
    { id: 6, name: 'Uruguay', continent: 'South America' },
    { id: 7, name: 'England', continent: 'Europe' },
    { id: 8, name: 'Spain', continent: 'Europe' },
  ]

  //Information about the wins
  const results = [
    { id: 1, countryId: 6, year: 1930, score: '4-2' },
    { id: 2, countryId: 3, year: 1934, score: '2-1' },
    { id: 3, countryId: 3, year: 1938, score: '4-2' },
    { id: 4, countryId: 6, year: 1950, score: '2-1' },
    { id: 5, countryId: 2, year: 1954, score: '3-2' },
    { id: 6, countryId: 1, year: 1958, score: '5-2' },
    { id: 7, countryId: 1, year: 1962, score: '3-1' },
    { id: 8, countryId: 7, year: 1966, score: '4-2' },
    { id: 9, countryId: 1, year: 1970, score: '4-1' },
    { id: 10, countryId: 2, year: 1974, score: '2-1' },
    { id: 11, countryId: 4, year: 1978, score: '3-1' },
    { id: 12, countryId: 3, year: 1982, score: '3-1' },
    { id: 13, countryId: 4, year: 1986, score: '3-2' },
    { id: 14, countryId: 2, year: 1990, score: '1-0' },
    { id: 15, countryId: 1, year: 1994, score: '3-2p' },
    { id: 16, countryId: 5, year: 1998, score: '3-0' },
    { id: 17, countryId: 1, year: 2002, score: '2-0' },
    { id: 18, countryId: 3, year: 2006, score: '5-3p' },
    { id: 19, countryId: 8, year: 2010, score: '1-0' },
    { id: 20, countryId: 2, year: 2014, score: '1-0' },
    { id: 21, countryId: 5, year: 2018, score: '4-2' },
  ]

  return {
    //returns the information of the country
    getWinner: async (countryName) => {
      const match = countries.find((country) => country.name === countryName)
      if (!match) throw Error('Country Not Found')
      return match
    },
    //returns the information of the wins of that country
    getResults: async (countryId) => {
      const match = results.filter((result) => result.countryId === countryId)
      if (!match.length) throw Error('Results Not Found')
      return match
    },
    addCountry: (country) => countries.push(country),
    addResults: (result) => results.push(result),
  }
})()