/*

    Copyright 2022 Dolomite.

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

*/

pragma solidity ^0.5.7;

import { Require } from "../../protocol/lib/Require.sol";
import { ILiquidatorAssetRegistry } from "../interfaces/ILiquidatorAssetRegistry.sol";


contract HasLiquidatorRegistry {

    // ============ Constants ============

    bytes32 private constant FILE = "HasLiquidatorRegistry";

    // ============ Storage ============

    ILiquidatorAssetRegistry public LIQUIDATOR_ASSET_REGISTRY;

    // ============ Modifiers ============

    modifier requireIsAssetWhitelistedForLiquidation(uint256 _marketId) {
        _validateAssetForLiquidation(_marketId);
        _;
    }

    modifier requireIsAssetsWhitelistedForLiquidation(uint256[] memory _marketIds) {
        _validateAssetsForLiquidation(_marketIds);
        _;
    }

    // ============ Constructors ============

    constructor(
        address _liquidatorAssetRegistry
    )
    public
    {
        LIQUIDATOR_ASSET_REGISTRY = ILiquidatorAssetRegistry(_liquidatorAssetRegistry);
    }

    // ============ Internal Functions ============

    function _validateAssetForLiquidation(uint256 _marketId) internal view {
        Require.that(
            LIQUIDATOR_ASSET_REGISTRY.isAssetWhitelistedForLiquidation(_marketId, address(this)),
            FILE,
            "Asset not whitelisted",
            _marketId
        );
    }

    function _validateAssetsForLiquidation(uint256[] memory _marketIds) internal view {
        ILiquidatorAssetRegistry liquidatorAssetRegistry = LIQUIDATOR_ASSET_REGISTRY;
        uint256 marketIdsLength = _marketIds.length;
        for (uint256 i; i < marketIdsLength; ++i) {
            Require.that(
                liquidatorAssetRegistry.isAssetWhitelistedForLiquidation(_marketIds[i], address(this)),
                FILE,
                "Asset not whitelisted",
                _marketIds[i]
            );
        }
    }

}