// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;
struct Request {
uint id;
address author;
string title;
string description;
string contact;
uint timestamp;//quantidade de segundos de 1/1/1970 até hoje
uint goal;//wei
uint balance;
bool open;
}
contract CatHelp {
uint public lastId = 0;
mapping(uint=>Request) public requests;
function openRequest(string memory title, string memory description, string memory contact, uint goal) public {
lastId++;
requests[lastId]= Request ({
id: lastId,
title: title,
description: description,
contact: contact,
goal: goal,
balance:0,
timestamp: block.timestamp,
author: msg.sender,
open: true
});
}
function closeRequest (uint id) public {
address author = requests[id].author;
uint balance = requests[id].balance;
uint goal = requests[id].balance;
require(requests[id].open && msg.sender == author || balance >= goal, "Not Allowed");
requests[id].open = false;
if (balance > 0) {
requests[id].balance = 0;
payable(author).transfer(balance);
}
}
function donate(uint id) public payable{
requests[id].balance += msg.value;
if (requests[id].balance >= requests[id].goal)
closeRequest(id);
}
function getOpenRequests (uint startId, uint quantity) public view returns (Request[] memory) {
Request[] memory result = new Request[](quantity);
uint id = startId;
uint count = 0;
do {
if (requests[id].open) {
result[count] = requests[id];
count++;
}
id++;
}
while(count<quantity && id <= lastId);
return result;
}
}
