Untitled

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

/**
* @title GarageManager
* @dev Contract to manage a garage of cars for each user
*/
contract GarageManager {
mapping(address => Car[]) private garages;

struct Car {
string make;
string model;
string color;
uint numberOfDoors;
}

error BadCarIndex(uint256 index);

/**
* @dev Adds a new car to the caller's garage
* @param _make The make of the car
* @param _model The model of the car
* @param _color The color of the car
* @param _numberOfDoors The number of doors of the car
*/
function addCar(string memory _make, string memory _model, string memory _color, uint _numberOfDoors) external {
garages[msg.sender].push(Car(_make, _model, _color, _numberOfDoors));
}

/**
* @dev Retrieves the caller's array of cars
* @return An array of `Car` structs
*/
function getMyCars() external view returns (Car[] memory) {
return garages[msg.sender];
}

/**
* @dev Retrieves a specific user's array of cars
* @param _user The address of the user
* @return An array of `Car` structs
*/
function getUserCars(address _user) external view returns (Car[] memory) {
return garages[_user];
}

/**
* @dev Updates a specific car in the caller's garage
* @param _index The index of the car in the garage array
* @param _make The new make of the car
* @param _model The new model of the car
* @param _color The new color of the car
* @param _numberOfDoors The new number of doors of the car
*/
function updateCar(uint256 _index, string memory _make, string memory _model, string memory _color, uint _numberOfDoors) external {
if (_index >= garages[msg.sender].length) {
revert BadCarIndex({index: _index});
}
garages[msg.sender][_index] = Car(_make, _model, _color, _numberOfDoors);
}

/**
* @dev Deletes all cars in the caller's garage
*/
function resetMyGarage() external {
delete garages[msg.sender];
}
}