CommunityHealthSupportDapp.sol

//Author: @emma_odia on Twitter
// We will be using Solidity version 0.5.4
pragma solidity ^0.6.0;

import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol';

contract CommunityHealthSupportDapp {
    using SafeMath for uint256;

    // List of existing projects
    Project[] private projects;

    // Event that will be emitted whenever a new project is started
    event ProjectStarted(
        address contractAddress,
        address projectStarter,
        string projectTitle,
        string projectDesc,
        string email,
        uint256 phone,
        uint256 goalAmount
    );

    function startProject(
        string calldata title,
        string calldata description,
        string calldata email,
        uint phone,
        uint amountToRaise
    ) external {
        Project newProject = new Project(msg.sender, title, description, email, phone, amountToRaise);
        projects.push(newProject);
        emit ProjectStarted(
            address(newProject),
            msg.sender,
            title,
            description,
            email,
            phone,
            amountToRaise
        );
    }                                                                                                                                   

  
    function returnAllProjects() external view returns(Project[] memory){
        return projects;
    }
}


contract Project {
    using SafeMath for uint256;
    
    // Data structures
    enum State {
        Fundraising,
        Successful
    }

    // State variables
    address payable public creator;
    uint public amountGoal; // required to reach at least this much, else everyone gets refund
    uint public completeAt;
    uint256 public currentBalance;
    uint public raiseBy;
    string public title;
    string public description;
    string public email;
    uint256 public phone;
    State public state = State.Fundraising; // initialize on create
    mapping (address => uint) public contributions;

    // Event that will be emitted whenever funding will be received
    event FundingReceived(address contributor, uint amount, uint currentTotal);
    // Event that will be emitted whenever the project starter has received the funds
    event CreatorPaid(address recipient);

    // Modifier to check current state
    modifier inState(State _state) {
        require(state == _state);
        _;
    }

    // Modifier to check if the function caller is the project creator
    modifier isCreator() {
        require(msg.sender == creator);
        _;
    }

    constructor
    (
        address payable projectStarter,
        string memory projectTitle,
        string memory projectDesc,
        string memory projectEmail,
        uint projectPhone,
        uint goalAmount
    ) public {
        creator = projectStarter;
        title = projectTitle;
        description = projectDesc;
        email = projectEmail;
        phone = projectPhone;
        amountGoal = goalAmount;
        currentBalance = 0;
    }

    
    function contribute() external inState(State.Fundraising) payable {
        require(msg.sender != creator);
        contributions[msg.sender] = contributions[msg.sender].add(msg.value);
        currentBalance = currentBalance.add(msg.value);
        emit FundingReceived(msg.sender, msg.value, currentBalance);
    }

    
    function payOut() internal inState(State.Successful) returns (bool) {
        uint256 totalRaised = currentBalance;
        currentBalance = 0;

        if (creator.send(totalRaised)) {
            emit CreatorPaid(creator);
            return true;
        } else {
            currentBalance = totalRaised;
            state = State.Successful;
        }

        return false;
    }

    
    function getDetails() public view returns 
    (
        address payable projectStarter,
        string memory projectTitle,
        string memory projectDesc,
        string memory projectEmail,
        uint256 projectPhone,
        State currentState,
        uint256 currentAmount,
        uint256 goalAmount
    ) {
        projectStarter = creator;
        projectTitle = title;
        projectDesc = description;
        projectEmail = email;
        projectPhone = phone;
        currentState = state;
        currentAmount = currentBalance;
        goalAmount = amountGoal;
    }
}