pragma solidity ^0.5.2;

contract Campaign{
    struct Request{
        string description;
        uint value;
        address payable recipient;
        bool complete;
        uint approvalCount;
        mapping(address=>bool) approvals;
    }

    Request[] public requests;
    address public manager;
    uint public minimumContribution;
    mapping(address=>bool) public approvers;//people who do yes or no , these are the people who contribute
    uint public approversCount;// will be incremented when they contribute

    modifier restricted(){
        require(msg.sender==manager);
        _;
    }

    constructor (uint minimum) public{
        manager=msg.sender;
        minimumContribution=minimum;

    }

    function contribute() public payable{
        require(msg.value>minimumContribution);

        approvers[msg.sender]=true;
        approversCount++;
    }

    function createRequest(string memory description,uint value,address payable recipient) public restricted{
        Request memory newRequest= Request({
            description:description,
            value:value,
            recipient:recipient,
            complete:false,
            approvalCount:0
           // approvals:false
            //:false
        });

        requests.push(newRequest);
    }

    function approveRequest(uint index) public {
        Request storage request= requests[index];

        require(approvers[msg.sender]);//he should be a contributer first
        require(!request.approvals[msg.sender]);//check wheather he has not voted before!

        request.approvals[msg.sender]=true;// double check by making if that guy is voting now in side this function set him as he
        //voted inside in this function

        request.approvalCount++;

    }

    function finalizeRequest(uint index) public{
        Request storage request=requests[index];

        require(request.approvalCount>(approversCount/2));


        require(!request.complete);
        request.recipient.transfer(request.value);
        request.complete=true;

    }


}