election.js

/**
* CYF JS core 3 election project
*/
/**
 * 1 - Convert candidates object to array
 */
function candidatesObjToArray(candidates) {
    var candidatesArr = Object.keys(candidates).map((x)=> candidates[x]);
    return candidatesArr;
}

/**
* 2 - Remove any voters who have voted for more than 2 people, or have voted for the same person twice.
*/
function filterInvalidVoters(voters) {
var validVoters =[];
    for(i=0; i<voters.length; i++){
       if(voters[i].votingCard.length <= 2 && voters[i].votingCard[0]!==voters[i].votingCard[1]){
            validVoters.push(voters[i])
        }
      }
      return validVoters
 }

/**
* 3 - Add up all the votes cast by the voting population. Note that for two adjacent votes in the vote array,
* the right vote counts for half of the left vote.
*/
function runElection(voters, candidates) {
for(i=0; i < voters.length; i++){
          if(voters[i].votingCard['0'] === 1 ){
            console.log(candidates);
            candidates[1].numVotes++    
        }
          if(voters[i].votingCard[1] === 1 ){
            candidates[1].numVotes+=1/2    
        } 
           if(voters[i].votingCard[0] === 2 ){
            candidates[2].numVotes++    
        }
          if(voters[i].votingCard[1] === 2 ){
            candidates[2].numVotes+=1/2    
        }
         if(voters[i].votingCard[0] === 3 ){
            candidates[3].numVotes++    
        }
          if(voters[i].votingCard[1] === 3 ){
            candidates[3].numVotes+=1/2    
        }
        
         if(voters[i].votingCard[0] === 4 ){
            candidates[4].numVotes++    
        }
          if(voters[i].votingCard[1] === 4 ){
            candidates[4].numVotes+=1/2    
        }
        }
        return candidates

}

/**
* 4 - After an election has been run, return the winner
*
* Desired return value: {name: "Tamara Faiza", age: 46, party: "Pizza Party", numVotes: 3}
*/
function getWinner(candidates) {
var maxVote = 0;
    var winner;
    for (var i = 1; i < 5; i++) {
        if (candidates[i].numVotes > maxVote) {
            maxVote = candidates[i].numVotes;
            winner = candidates[i];
        }
    }
    return winner;
}

/**
* 5 - Return a message including the name of the winner, and how many votes
* he/she received
*/
function winnerMessage(winner) {
return winner.name + ' has won the election with ' + winner.numVotes + ' votes!';
}


/*
// A sample population of a small number of voters, stored as an array
let votingPopulation = [
{name: 'Jane Finnegan', age: 19, votingCard: [1,3]},
{name: 'Norman Beracha', age: 35, votingCard: [3,4]},
{name: 'Salome Kadek', age: 22, votingCard: [2,1,3]},
{name: 'Wei Li', age: 19, votingCard: [1,2]},
{name: 'Sam MacKinnon', age: 59, votingCard: [1,4]}
];

// The election candidates, stored as an object where each object key is the candidate ID, and the object
// value is the candidate object itself.
let candidates = {
1: {name: 'Tamara Faiza', age: 46, votingCard: [1,1], party: 'Pizza Party', numVotes: 0},
2: {name: 'Aylin Duke', age: 39, votingCard: [2,2], party: 'Foam Party', numVotes: 0},
3: {name: 'Clay Roderick', age: 54, votingCard: [3,4], party: 'Flat Earth Party', numVotes: 0},
4: {name: 'Nour al-Din', age: 32, votingCard: [4,1], party: 'Pizza Party', numVotes: 0}
};

let allVoters = votingPopulation.concat(candidatesObjToArray(candidates));

let validVoters = filterInvalidVoters(allVoters);

candidates = runElection(validVoters, candidates);

let winner = getWinner(candidates);
*/
module.exports = {
candidatesObjToArray,
filterInvalidVoters,
runElection,
getWinner,
winnerMessage
}