getTokenIdOfAccessLevel

This view function retrieves the token ID associated with a specific access level for an event. It takes two parameters:

• _eventId: The unique identifier for the event.

• _accessLevel: The access level for which to retrieve the token ID.

// Some code

```remix-solidity
 /**
    GetTokenIdOfAccessLevel: Get the token ID associated with a specific access level for an event.
    @param _eventId: The unique identifier for the event.
    @param _accessLevel: The access level for which to retrieve the token ID.
    @return _tokenId: The token ID associated with the specified access level.
    */
    function getTokenIdOfAccessLevel(
        string calldata _eventId,
        string calldata _accessLevel
    ) public view returns (uint256) {
        uint256 _tokenId;

        // Retrieve all token IDs and access levels for the event
        uint256[] memory tokenIds = getTokenIdsFromEventId(_eventId);
        string[] memory accessLevels = getAccessLevelsFromEventId(_eventId);

        // Loop through access levels to find matching access level and retrieve corresponding token ID
        for (
            uint256 i = 0;
            i < tokenIds.length && i < accessLevels.length;
            ++i
        ) {
            if (
                keccak256(bytes(_accessLevel)) ==
                keccak256(bytes(accessLevels[i]))
            ) {
                _tokenId = tokenIds[i];
                break;
            }
        }

        // Revert if no matching token ID is found
        if (_tokenId == 0) {
            revert DecastGating__TokenIdDoesNotExists();
        }
        return _tokenId;
    }
```

Explanation:

The function first retrieves all token IDs and access levels associated with the provided event ID using helper functions getTokenIdsFromEventId and getAccessLevelsFromEventId. Then, it iterates through these arrays to find a match between the provided access level and the access levels associated with the event. If a match is found, it retrieves the corresponding token ID.

If no matching token ID is found, the function reverts with the error message DecastGating__TokenIdDoesNotExists.

Finally, the function returns the retrieved token ID associated with the specified access level.