relative-placement.js
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/**
* Created by Techniv on 30/11/2016.
*/
(function (define) {
// TODO define exhaustive module platform
module.exports = define();
})(function(){
/**
*
* @constructor
* @property {Candidate[]} candidateList
* @property {String[]} votes
* @property {Number} numberOfCandidates
*
*/
function RelativePlacement() {
Object.defineProperties(this, {
candidateList: {value: {}},
votes: {value: []},
numberOfCandidates: {get: () => Object.keys(this.candidateList).length}
});
}
/**
* @name addCandidate
* @param {String} candidateName
* @methodOf RelativePlacement
* @this RelativePlacement
*/
RelativePlacement.prototype.addCandidate = function addCandidate(candidateName){
if(this.candidateList[candidateName]) throw new Error('"' +candidateName+ '" already exist in candidate list.');
this.candidateList[candidateName] = new Candidate(candidateName);
};
/**
* @name addCandidates
* @param {String[]} candidateNames
* @methodOf RelativePlacement
* @this RelativePlacement
*/
RelativePlacement.prototype.addCandidates = function (candidateNames) {
for(let i = 0; i < candidateNames.length; i++){
this.addCandidate(candidateNames[i]);
}
};
/**
* @name addVote
* @param {String[]} vote
* @methodOf RelativePlacement
* @this RelativePlacement
*/
RelativePlacement.prototype.addVote = function (vote) {
if(vote.length != this.numberOfCandidates)
throw new Error('The vote and the candidate list have not the same size.');
var candidates = Object.keys(this.candidateList);
var controlMask = Math.pow(2,candidates.length)-1;
var checkMask = 0;
for(let i = 0; i < vote.length; i++){
var index = candidates.indexOf(vote[i]);
if(index == -1) throw new Error('The candidate "'+vote[i]+"' is not present in candidate list.");
checkMask |= Math.pow(2, index);
}
if(checkMask != controlMask) throw new Error('Candidate must be unique in each vote.');
this.votes.push(vote);
for(let i = 0; i < vote.length; i++){
let candidate = this.candidateList[vote[i]];
candidate.votes.push(i);
}
};
RelativePlacement.prototype.addVotes = function () {};
RelativePlacement.prototype.getResult = function () {};
/**
*
* @param name
* @constructor
* @property {String} name
* @property {Number[]} votes
* @property {Number[]} placements
*/
function Candidate(name) {
Object.defineProperties(this, {
name: {value: name, enumerable: true},
votes: {value:[], enumerable: true},
placements: {value:[], enumerable: true, writable: true}
});
}
return RelativePlacement;
});