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ballot.sol

pragma solidity >=0.4.22 <0.6.0;
contract Ballot {

    struct Voter {
        uint weight;
        bool voted;
        uint8 vote;
        address delegate;
    }
    struct Proposal {
        uint voteCount;
    }

    address chairperson;
    mapping(address => Voter) voters;
    Proposal[] proposals;

    /// Create a new ballot with $(_numProposals) different proposals.
    constructor(uint8 _numProposals) public {
        chairperson = msg.sender;
        voters[chairperson].weight = 1;
        proposals.length = _numProposals;
    }

    /// Give $(toVoter) the right to vote on this ballot.
    /// May only be called by $(chairperson).
    function giveRightToVote(address toVoter) public {
        if (msg.sender != chairperson || voters[toVoter].voted) return;
        voters[toVoter].weight = 1;
    }

    /// Delegate your vote to the voter $(to).
    function delegate(address to) public {
        Voter storage sender = voters[msg.sender]; // assigns reference
        if (sender.voted) return;
        while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender)
            to = voters[to].delegate;
        if (to == msg.sender) return;
        sender.voted = true;
        sender.delegate = to;
        Voter storage delegateTo = voters[to];
        if (delegateTo.voted)
            proposals[delegateTo.vote].voteCount += sender.weight;
        else
            delegateTo.weight += sender.weight;
    }

    /// Give a single vote to proposal $(toProposal).
    function vote(uint8 toProposal) public {
        Voter storage sender = voters[msg.sender];
        if (sender.voted || toProposal >= proposals.length) return;
        sender.voted = true;
        sender.vote = toProposal;
        proposals[toProposal].voteCount += sender.weight;
    }

    function winningProposal() public view returns (uint8 _winningProposal) {
        uint256 winningVoteCount = 0;
        for (uint8 prop = 0; prop < proposals.length; prop++)
            if (proposals[prop].voteCount > winningVoteCount) {
                winningVoteCount = proposals[prop].voteCount;
                _winningProposal = prop;
            }
    }
}

ballot_test.sol

pragma solidity ^0.4.17;

contract CampaignFactory {
    address[] public deployedCampaigns;
    
    function createCampaign(uint minimum) public {
        address newCampaign = new Campaign(minimum, msg.sender);
        deployedCampaigns.push(newCampaign);
    }
    
    function getDeployedCampaigns() public view returns(address[]) {
        return deployedCampaigns;
    }
}


contract Campaign {
    struct Request {
        string description;
        uint value;
        address recipient;
        bool complete;
        uint approvalCount;
        mapping(address => bool) approvals;
    }
    
    Request[] public requests;
    address public manager;
    uint public mininumContribution;
    mapping(address => bool) public approvers;
    uint public approversCount;
    
    modifier restricted() {
        require(msg.sender == manager);
        _;
    }
    
    function Campaign(uint minimum, address creator) public{
        manager = creator;
        mininumContribution = minimum;
    }
    
    function contribute() public payable {
        require(msg.value > mininumContribution);
        
        approvers[msg.sender] = true;
        approversCount++;

    }
    
    function createRequest(string description, uint value, address recipient) public restricted {
        Request memory newRequest = Request({
           description: description, 
           value: value,
           recipient: recipient,
           complete: false,
           approvalCount: 0
        });
        
        requests.push(newRequest);
    }
    
    function approveRequest(uint index) public {
        Request storage request = requests[index];
    
        require(approvers[msg.sender]);
        require(!request.approvals[msg.sender]);
        request.approvals[msg.sender] = true;
        request.approvalCount++;
        
    }
    
    function finalizeRequest(uint index) public restricted {
        Request storage request = requests[index];
        require(!request.complete);
        require(request.approvalCount > (approversCount/2));
        request.recipient.transfer(request.value);
        request.complete = true;
        
    }
}