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pragma solidity ^0.4.2;
contract Ballot {
struct Voter {
uint weight;
bool voted;
Proposal vote;
address delegate;
}
struct Proposal {
string name;
string desc;
uint voteCount;
}
address chairperson;
mapping(address => Voter) voters;
Proposal[] public proposals;
string public voteName;
/// Create a new ballot with $(_numProposals) different proposals.
function Ballot(string votename) {
chairperson = msg.sender;
voters[chairperson].weight = 1;
//proposals.length = _numProposals;
voteName = votename;
}
function addProposal(string propsalname, string desc){
if(msg.sender != chairperson){
return;
}
proposals.push(Proposal({
name: propsalname,
desc: desc,
voteCount: 0
}));
}
/// Give $(voter) the right to vote on this ballot.
/// May only be called by $(chairperson).
function giveRightToVote(address voter) {
if (msg.sender != chairperson || voters[voter].voted) return;
voters[voter].weight = 1;
}
/// Give a single vote to proposal $(proposal).
function vote(string proposalname) {
Voter sender = voters[msg.sender];
if (sender.voted) return;
bool find = false;
for(uint i=0;i<proposals.length;i++){
if(equal(proposals[i].name , proposalname)){
sender.voted = true;
sender.vote = proposals[i];
proposals[i].voteCount += sender.weight;
}
}
return;
}
function winningProposal() constant returns (uint8 winningProposal) {
uint256 winningVoteCount = 0;
for (uint8 proposal = 0; proposal < proposals.length; proposal++)
if (proposals[proposal].voteCount > winningVoteCount) {
winningVoteCount = proposals[proposal].voteCount;
winningProposal = proposal;
}
}
function compare(string _a, string _b) private returns (int) {
bytes memory a = bytes(_a);
bytes memory b = bytes(_b);
uint minLength = a.length;
if (b.length < minLength) minLength = b.length;
//@todo unroll the loop into increments of 32 and do full 32 byte comparisons
for (uint i = 0; i < minLength; i ++)
if (a[i] < b[i])
return -1;
else if (a[i] > b[i])
return 1;
if (a.length < b.length)
return -1;
else if (a.length > b.length)
return 1;
else
return 0;
}
/// @dev Compares two strings and returns true iff they are equal.
function equal(string _a, string _b) private returns (bool) {
return compare(_a, _b) == 0;
}
}
@fdoherty13

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@fdoherty13 fdoherty13 commented Feb 12, 2021

Awesome

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