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Prevent duplicate registrations and add input validation #60

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Oct 21, 2024
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Prevent duplicate registrations and add input validation #60

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29 changes: 26 additions & 3 deletions contracts/event_registration.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,17 @@ contract EventRegistration {
mapping(address => Participant) public participants;
address[] public participantAddresses;

event ParticipantRegistered(
address indexed participantAddress,
string fullname,
string eventName
);
event ParticipantUpdated(
address indexed participantAddress,
string fullname,
string eventName
);

function registerParticipant(
string memory _fullname,
string memory _stream,
Expand All @@ -22,16 +33,28 @@ contract EventRegistration {
string memory _phno,
string memory _roll
) public {
Participant memory newParticipant = Participant({
require(bytes(_fullname).length > 0, "Full name is required.");
require(bytes(_stream).length > 0, "Stream is required.");
require(bytes(_eventName).length > 0, "Event name is required.");
require(bytes(_email).length > 0, "Email is required.");
require(bytes(_phno).length > 0, "Phone number is required.");
require(bytes(_roll).length > 0, "Roll number is required.");

if (bytes(participants[msg.sender].fullname).length == 0) {
participantAddresses.push(msg.sender);
emit ParticipantRegistered(msg.sender, _fullname, _eventName);
} else {
emit ParticipantUpdated(msg.sender, _fullname, _eventName);
}

participants[msg.sender] = Participant({
fullname: _fullname,
stream: _stream,
eventName: _eventName,
email: _email,
phno: _phno,
roll: _roll
});
participants[msg.sender] = newParticipant;
participantAddresses.push(msg.sender);
}

function getParticipant(address _addr)
Expand Down