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/**
 *     NOTICE
 *
 *     The T-REX software is licensed under a proprietary license or the GPL v.3.
 *     If you choose to receive it under the GPL v.3 license, the following applies:
 *     T-REX is a suite of smart contracts implementing the ERC-3643 standard and
 *     developed by Tokeny to manage and transfer financial assets on EVM blockchains
 *
 *     Copyright (C) 2023, Tokeny sàrl.
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

pragma solidity 0.8.17;

import "./IModule.sol";

abstract contract AbstractModule is IModule {

    /// compliance contract binding status
    mapping(address => bool) private _complianceBound;

    /**
     * @dev Throws if `_compliance` is not a bound compliance contract address.
     */
    modifier onlyBoundCompliance(address _compliance) {
        require(_complianceBound[_compliance], "compliance not bound");
        _;
    }

    /**
     * @dev Throws if called from an address that is not a bound compliance contract.
     */
    modifier onlyComplianceCall() {
        require(_complianceBound[msg.sender], "only bound compliance can call");
        _;
    }

    /**
     *  @dev See {IModule-bindCompliance}.
     */
    function bindCompliance(address _compliance) external override {
        require(_compliance != address(0), "invalid argument - zero address");
        require(!_complianceBound[_compliance], "compliance already bound");
        require(msg.sender == _compliance, "only compliance contract can call");
        _complianceBound[_compliance] = true;
        emit ComplianceBound(_compliance);
    }

    /**
     *  @dev See {IModule-unbindCompliance}.
     */
    function unbindCompliance(address _compliance) external onlyComplianceCall override {
        require(_compliance != address(0), "invalid argument - zero address");
        require(msg.sender == _compliance, "only compliance contract can call");
        _complianceBound[_compliance] = false;
        emit ComplianceUnbound(_compliance);
    }

    /**
     *  @dev See {IModule-isComplianceBound}.
     */
    function isComplianceBound(address _compliance) external view override returns (bool) {
        return _complianceBound[_compliance];
    }

}