Locations Smart Contract

Locations.sol

pragma solidity 0.4.26;

contract Locations {
  struct Location {
    string lat;
    string long;
  }

  Location[] locations;

  mapping (address => uint256[]) accounts;

  function addLocation(string lat, string long) public {
    uint256 locationIndex = locations.push(
      Location({
        lat: lat,
        long: long
      })
    ) - 1;

    accounts[msg.sender].push(locationIndex);
  }

  function getLocationByIndex(uint256 locationIndex) public view returns (
    string lat,
    string long
  ) {
    return (
      locations[locationIndex].lat,
      locations[locationIndex].long
    );
  }

  function getLocationsByAccount(address account) public view returns (uint256[] memory) {
    return accounts[account];
  }
}