Voting System's Smart Contract

 pragma solidity ^0.8.0;

//making a voting contract

//1 we want the ability to accept proposals and store them
// proposal: their name, number

//2 voters & voing ability
//keep track of voting 





contract Ballot {

    
    struct Voter{
        uint vote;
       bool voted; 
       uint weight;
    }
    struct Proposal {   
    bytes32 name; //name of each proposal
    uint voteCount; //number of accumulated votes
}

Proposal[] public proposals;
  
  //mapping

  mapping (address => Voter) public voters; 

//   address public chairperson; 
  
  constructor( bytes32[] memory proposalNames) { 

    //   chairperson = msg.sender; 
      
    //   voters[chairperson].weight = 1;
      
      for(uint i=0; i < proposalNames.length; i++){ 
          proposals.push(Proposal({ 
              name: proposalNames[i], 
              voteCount: 0 
              
            })); 
            } 
  }
//function for authenticate votes
//  function giveRightToVote(address voter) public {
//     //  require(msg.sender == voter,
//     //          'Only the chairperson can give access to vote');
//             //  require that the voter hasn't voted yet
            //  require(!voters[voter].voted,
            //  'The voter has already voted');

function giveRight (address voter) public { 
             require(!voters[voter].voted,
             'The voter has already voted');

             require(voters[voter].weight == 0);
             voters[voter].weight = 1;
}
//  }

//functions for voting

function vote(uint proposal) public {
    Voter storage sender = voters[msg.sender];
    require(sender.weight != 0,'Has no right to vote');
    require(!sender.voted, 'Already voted');
    sender.voted = true;
    sender.vote = proposal;

    proposals[proposal].voteCount += sender.weight;
}

//functions for showing the results
 
//winning

function winningProposal() public view returns (uint winningProposal_) {

uint winningVoteCount = 0;

for (uint i = 0; i< proposals.length; i++) {

    if (proposals[i].voteCount > winningVoteCount) {

        winningVoteCount = proposals[i].voteCount;

        winningProposal_ = i;
    }
}

}

//winner's namme

function winningName() public view returns (bytes32 winningName_) {

winningName_ = proposals[winningProposal()].name;

}


}