Functions that look at different aspects of the social network (eg. who's most popular)

socialNetwork.js

const biggestFollower = function(data) {
  let biggestFollower = 0;
  let biggestFollowerKey = '';
  for (const person in data) {
    if (data[person]["follows"].length > biggestFollower) {
      biggestFollower = data[person]["follows"].length;
      biggestFollowerKey = person;
    }
  }
  return biggestFollowerKey;
};

const mostPopular = function(data) {
  let result = {};
  for (const person in data) {
    for (const following of data[person]["follows"]) {
      if (result[following] === undefined) {
        result[following] = 1;
      } else {
        result[following] += 1;
      }
    }
  }
  let resultValues = Object.values(result);
  let resultKeys = Object.keys(result);
  return resultKeys[resultValues.indexOf(Math.max(...resultValues))];
};

const whoFollowsMe = function(person, data) {
  let result = [];
  for (const pal in data) {
    if (data[pal]["follows"].includes(person)) {
      result.push(pal);
    }
  }
  return result;
};

const printAll = function(data) {
  let result = {};
  for (const person in data) {
    result[person] = {
      following: data[person]["follows"],
      followers: whoFollowsMe(person, data),
    };
  }
  return result;
};

const eqArrays = function(firstArray, secondArray) {
  if (firstArray.length !== secondArray.length) {
    return false;
  } else {
    for (let i = 0; i < firstArray.length; i++) {
      if (firstArray[i] !== secondArray[i]) {
        return false;
      }
    }
  }
  return true;
};

const unrequitedFollowers = function(data) {
  let unrequitedFollowers = [];
  for (const person in data) {
    if (!eqArrays(data[person]["follows"], whoFollowsMe(person, data))) {
      unrequitedFollowers.push(person);
    }
  }
  return unrequitedFollowers;
};

const mostPopularOver30 = function(data) {
  let peopleOver30Followers = [];
  let peopleOver30Name = [];
  for (const person in data) {
    if (data[person]["age"] >= 30) {
      peopleOver30Name.push(person);
      peopleOver30Followers.push(whoFollowsMe(person, data).length);
    }
  }
  return peopleOver30Name[peopleOver30Followers.indexOf(Math.max(...peopleOver30Followers))];
};

const biggestFollowerOver30 = function(data) {
  let peopleOver30 = {};
  for (const person in data) {
    if (data[person]["age"] >= 30) {
      peopleOver30[person] = data[person];
    }
  }
  return biggestFollower(peopleOver30);
};

const everyonesReach = function(data) {
  let result = {};
  for (const person in data) {
    const totalFollowers = whoFollowsMe(person, data);
    result[person] = {
      totalFollowers,
      totalFollowersFollowers: [...new Set(totalFollowers.map(follower => whoFollowsMe(follower, data)).flat())],
    };
  }
  return result;
};

const data = {
  f01: {
    name: "Alice",
    age: 15,
    follows: ["f02", "f03", "f04"]
  },
  f02: {
    name: "Bob",
    age: 20,
    follows: ["f05", "f06"]
  },
  f03: {
    name: "Charlie",
    age: 35,
    follows: ["f01", "f04", "f06"]
  },
  f04: {
    name: "Debbie",
    age: 10,
    follows: ["f01", "f02", "f03", "f05", "f06"]
  },
  f05: {
    name: "Elizabeth",
    age: 45,
    follows: ["f04"]
  },
  f06: {
    name: "Finn",
    age: 25,
    follows: ["f05"]
  }
};

//Test Code
console.log(biggestFollower(data));
console.log(mostPopular(data));
console.log(printAll(data));
console.log(unrequitedFollowers(data));
console.log(mostPopularOver30(data));
console.log(biggestFollowerOver30(data));
console.log(everyonesReach(data));