Remove Duplicates

brainly-solution.js

const testData = [
  {
    "id": 123,
    "content": "Content",
    "createTimestamp": 123213,
    "answers": [
      {
        "id": 142,
        "rating": 10,
        "content": "Test answer"
      },
      {
        "id": 242,
        "rating": 2,
        "content": "Test answer 2"
      }
    ]
  },
  {
    "id": 5,
    "content": "Different content",
    "createTimestamp": 123214,
    "answers": [
      {
        "id": 342,
        "rating": 15,
        "content": "Test answer 3"
      }
    ]
  },
  {
    "id": 1024,
    "content": "Content",
    "createTimestamp": 54343,
    "answers": [
      {
        "id": 442,
        "rating": 9,
        "content": "Test answer 4"
      }
    ]
  }
];

function fetchMaxAnswersRating(answers) {
  return answers.reduce((answer, maxScore) => {
    if(answer && answer.rating > maxScore) {
      return answer.rating
    }
    else return maxScore;
  }, 0).rating;
}

function filterUniqueContents(contents) {
  let results = []
  contents.map(content => {
    const contentData = content.content;
    const maxRating = fetchMaxAnswersRating(content.answers);
    const similarContents = contents.filter(content => {
      if (content.content === contentData) {
        const tempMaxRating = fetchMaxAnswersRating(content.answers);
        return maxRating > tempMaxRating;
      }
    });

    const isInResult = results.map(result => result.id === content.id).length;

    if (similarContents.length) {
      if (!isInResult) results.push(...similarContents);
    }
    else {
      results.push(content);
    }
  });

  return results;
}


console.log(filterUniqueContents(testData));