ophirvotingdapp.sol

//SPDX-License-Identifier:MIT

pragma solidity >=0.7.0<0.9.0;

/*

Intrinsic function of voting dapp

1. It will accept proposal Name, and number for tracking

2. Allow for members to vote and exercise voting ability.
(keep track of voting, check if voters are authenticated to vote.)

3. There will be an "authenticator" to approve wallets to vote

*/

contract OphirVotingDapp {

    struct Voter {
        uint vote;
        bool anyvotes;
        uint value;
    }

    struct Proposal{
        bytes32 name;
        uint voteCount;
    }

    Proposal [] public proposals;

    mapping(address => Voter) public voters;

    address public authenticator;

    constructor (bytes32 [] memory proposalNames) {
        
        authenticator = msg.sender;

        voters[authenticator].value = 1;

        for (uint i=0; i <
            
            proposalNames.length; i++) {
                proposals.push(Proposal({
                    name:proposalNames[i],
                    voteCount: 0
                }));
            }
    }

    //Function to authenticate votes
    function giveRightToVote(address voter) public {
        require(msg.sender == authenticator,
        'Only the authenticator gives access to vote');

        //require that voter hasn't voted yet

        require(!voters[voter].anyvotes,
        
        'The voter has already voted');
        require(voters[voter].value == 0);
        voters[voter].value = 1;
    }

    //Function for voting

    function vote (uint proposal) public{

        Voter storage sender =
        voters[msg.sender];

        require(sender.value !=0, 'Has no right to vote');

        require(!sender.anyvotes, 'Already voted');

        sender.anyvotes = true;
        sender.vote = proposal;

        proposals[proposal].voteCount = proposals[proposal].voteCount + sender.value;

        }

        //functions for showing results

        // 1. function that shows the winning proposal by integer

        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;

                
            }
            
        }

    }

        //2. function that shows the winner by name

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

            proposals[winningProposal()].name;
        }
}