pragma solidity ^0.4.24;



/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * See https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}


/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender)
    public view returns (uint256);

  function transferFrom(address from, address to, uint256 value)
    public returns (bool);

  function approve(address spender, uint256 value) public returns (bool);
  event Approval(
    address indexed owner,
    address indexed spender,
    uint256 value
  );
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  /**
  * @dev Total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @dev Transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256) {
    return balances[_owner];
  }

}

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/issues/20
 * Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    emit Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(
    address _owner,
    address _spender
   )
    public
    view
    returns (uint256)
  {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(
    address _spender,
    uint256 _addedValue
  )
    public
    returns (bool)
  {
    allowed[msg.sender][_spender] = (
      allowed[msg.sender][_spender].add(_addedValue));
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseApproval(
    address _spender,
    uint256 _subtractedValue
  )
    public
    returns (bool)
  {
    uint256 oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}


/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipRenounced(address indexed previousOwner);
  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Allows the current owner to relinquish control of the contract.
   * @notice Renouncing to ownership will leave the contract without an owner.
   * It will not be possible to call the functions with the `onlyOwner`
   * modifier anymore.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  /**
   * @dev Transfers control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}


/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */
contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  modifier hasMintPermission() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will receive the minted tokens.
   * @param _amount The amount of tokens to mint.
   * @return A boolean that indicates if the operation was successful.
   */
  function mint(
    address _to,
    uint256 _amount
  )
    hasMintPermission
    canMint
    public
    returns (bool)
  {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    emit Mint(_to, _amount);
    emit Transfer(address(0), _to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    emit MintFinished();
    return true;
  }
}

/**
 * @title Burnable Token
 * @dev Token that can be irreversibly burned (destroyed).
 */
contract BurnableToken is BasicToken {

  event Burn(address indexed burner, uint256 value);

  /**
   * @dev Burns a specific amount of tokens.
   * @param _value The amount of token to be burned.
   */
  function burn(uint256 _value) public {
    _burn(msg.sender, _value);
  }

  function _burn(address _who, uint256 _value) internal {
    require(_value <= balances[_who]);
    // no need to require value <= totalSupply, since that would imply the
    // sender's balance is greater than the totalSupply, which *should* be an assertion failure

    balances[_who] = balances[_who].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    emit Burn(_who, _value);
    emit Transfer(_who, address(0), _value);
  }
}



/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (a == 0) {
      return 0;
    }

    c = a * b;
    assert(c / a == b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    // uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return a / b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
    c = a + b;
    assert(c >= a);
    return c;
  }
}

/**
 * @title ERC827 interface, an extension of ERC20 token standard
 *
 * @dev Interface of a ERC827 token, following the ERC20 standard with extra
 * methods to transfer value and data and execute calls in transfers and
 * approvals.
 */
contract ERC827 is ERC20 {

    function approveAndCall(address _spender,uint256 _value,bytes _data) public payable returns(bool);

    function transferAndCall(address _to,uint256 _value,bytes _data) public payable returns(bool);

    function transferFromAndCall(address _from,address _to,uint256 _value,bytes _data) public payable returns(bool);

}

/**
 * @title ERC827, an extension of ERC20 token standard
 *
 * @dev Implementation the ERC827, following the ERC20 standard with extra
 * methods to transfer value and data and execute calls in transfers and
 * approvals. Uses OpenZeppelin StandardToken.
 */
contract ERC827Token is ERC827, StandardToken {

  /**
   * @dev Addition to ERC20 token methods. It allows to
   * approve the transfer of value and execute a call with the sent data.
   * Beware that changing an allowance with this method brings the risk that
   * someone may use both the old and the new allowance by unfortunate
   * transaction ordering. One possible solution to mitigate this race condition
   * is to first reduce the spender's allowance to 0 and set the desired value
   * afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address that will spend the funds.
   * @param _value The amount of tokens to be spent.
   * @param _data ABI-encoded contract call to call `_spender` address.
   * @return true if the call function was executed successfully
   */
    function approveAndCall(
        address _spender,
        uint256 _value,
        bytes _data
    )
    public
    payable
    returns (bool)
    {
        require(_spender != address(this));

        super.approve(_spender, _value);

        // solium-disable-next-line security/no-call-value
        require(_spender.call.value(msg.value)(_data));

        return true;
    }

  /**
   * @dev Addition to ERC20 token methods. Transfer tokens to a specified
   * address and execute a call with the sent data on the same transaction
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amout of tokens to be transfered
   * @param _data ABI-encoded contract call to call `_to` address.
   * @return true if the call function was executed successfully
   */
    function transferAndCall(
        address _to,
        uint256 _value,
        bytes _data
    )
    public
    payable
    returns (bool)
    {
        require(_to != address(this));

        super.transfer(_to, _value);

        // solium-disable-next-line security/no-call-value
        require(_to.call.value(msg.value)(_data));
        return true;
    }

  /**
   * @dev Addition to ERC20 token methods. Transfer tokens from one address to
   * another and make a contract call on the same transaction
   * @param _from The address which you want to send tokens from
   * @param _to The address which you want to transfer to
   * @param _value The amout of tokens to be transferred
   * @param _data ABI-encoded contract call to call `_to` address.
   * @return true if the call function was executed successfully
   */
    function transferFromAndCall(
        address _from,
        address _to,
        uint256 _value,
        bytes _data
    )
    public payable returns (bool)
    {
        require(_to != address(this));

        super.transferFrom(_from, _to, _value);

        // solium-disable-next-line security/no-call-value
        require(_to.call.value(msg.value)(_data));
        return true;
    }

  /**
   * @dev Addition to StandardToken methods. Increase the amount of tokens that
   * an owner allowed to a spender and execute a call with the sent data.
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   * @param _data ABI-encoded contract call to call `_spender` address.
   */
    function increaseApprovalAndCall(
        address _spender,
        uint _addedValue,
        bytes _data
    )
    public
    payable
    returns (bool)
    {
        require(_spender != address(this));

        super.increaseApproval(_spender, _addedValue);

        // solium-disable-next-line security/no-call-value
        require(_spender.call.value(msg.value)(_data));

        return true;
    }

  /**
   * @dev Addition to StandardToken methods. Decrease the amount of tokens that
   * an owner allowed to a spender and execute a call with the sent data.
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   * @param _data ABI-encoded contract call to call `_spender` address.
   */
    function decreaseApprovalAndCall(
        address _spender,
        uint _subtractedValue,
        bytes _data
    )
    public
    payable
    returns (bool)
    {
        require(_spender != address(this));

        super.decreaseApproval(_spender, _subtractedValue);

        // solium-disable-next-line security/no-call-value
        require(_spender.call.value(msg.value)(_data));

        return true;
    }

}

/**
 * @title DAOToken, base on zeppelin contract.
 * @dev ERC20 compatible token. It is a mintable, destructible, burnable token.
 */

contract DAOToken is ERC827Token,MintableToken,BurnableToken {

    string public name;
    string public symbol;
    // solium-disable-next-line uppercase
    uint8 public constant decimals = 18;
    uint public cap;

    /**
    * @dev Constructor
    * @param _name - token name
    * @param _symbol - token symbol
    * @param _cap - token cap - 0 value means no cap
    */
    constructor(string _name, string _symbol,uint _cap) public {
        name = _name;
        symbol = _symbol;
        cap = _cap;
    }

    /**
     * @dev Function to mint tokens
     * @param _to The address that will receive the minted tokens.
     * @param _amount The amount of tokens to mint.
     * @return A boolean that indicates if the operation was successful.
     */
    function mint(address _to, uint256 _amount) public onlyOwner canMint returns (bool) {
        if (cap > 0)
            require(totalSupply_.add(_amount) <= cap);
        return super.mint(_to, _amount);
    }
}

/**
 * @title Reputation system
 * @dev A DAO has Reputation System which allows peers to rate other peers in order to build trust .
 * A reputation is use to assign influence measure to a DAO'S peers.
 * Reputation is similar to regular tokens but with one crucial difference: It is non-transferable.
 * The Reputation contract maintain a map of address to reputation value.
 * It provides an onlyOwner functions to mint and burn reputation _to (or _from) a specific address.
 */

contract Reputation is Ownable {
    using SafeMath for uint;

    mapping (address => uint256) public balances;
    uint256 public totalSupply;
    uint public decimals = 18;

    // Event indicating minting of reputation to an address.
    event Mint(address indexed _to, uint256 _amount);
    // Event indicating burning of reputation for an address.
    event Burn(address indexed _from, uint256 _amount);

    /**
    * @dev return the reputation amount of a given owner
    * @param _owner an address of the owner which we want to get his reputation
    */
    function reputationOf(address _owner) public view returns (uint256 balance) {
        return balances[_owner];
    }

    /**
    * @dev Generates `_amount` of reputation that are assigned to `_to`
    * @param _to The address that will be assigned the new reputation
    * @param _amount The quantity of reputation to be generated
    * @return True if the reputation are generated correctly
    */
    function mint(address _to, uint _amount)
    public
    onlyOwner
    returns (bool)
    {
        totalSupply = totalSupply.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        emit Mint(_to, _amount);
        return true;
    }

    /**
    * @dev Burns `_amount` of reputation from `_from`
    * if _amount tokens to burn > balances[_from] the balance of _from will turn to zero.
    * @param _from The address that will lose the reputation
    * @param _amount The quantity of reputation to burn
    * @return True if the reputation are burned correctly
    */
    function burn(address _from, uint _amount)
    public
    onlyOwner
    returns (bool)
    {
        uint amountMinted = _amount;
        if (balances[_from] < _amount) {
            amountMinted = balances[_from];
        }
        totalSupply = totalSupply.sub(amountMinted);
        balances[_from] = balances[_from].sub(amountMinted);
        emit Burn(_from, amountMinted);
        return true;
    }
}

/**
 * @title An Avatar holds tokens, reputation and ether for a controller
 */
contract Avatar is Ownable {
    bytes32 public orgName;
    DAOToken public nativeToken;
    Reputation public nativeReputation;

    event GenericAction(address indexed _action, bytes32[] _params);
    event SendEther(uint _amountInWei, address indexed _to);
    event ExternalTokenTransfer(address indexed _externalToken, address indexed _to, uint _value);
    event ExternalTokenTransferFrom(address indexed _externalToken, address _from, address _to, uint _value);
    event ExternalTokenIncreaseApproval(StandardToken indexed _externalToken, address _spender, uint _addedValue);
    event ExternalTokenDecreaseApproval(StandardToken indexed _externalToken, address _spender, uint _subtractedValue);
    event ReceiveEther(address indexed _sender, uint _value);

    /**
    * @dev the constructor takes organization name, native token and reputation system
    and creates an avatar for a controller
    */
    constructor(bytes32 _orgName, DAOToken _nativeToken, Reputation _nativeReputation) public {
        orgName = _orgName;
        nativeToken = _nativeToken;
        nativeReputation = _nativeReputation;
    }

    /**
    * @dev enables an avatar to receive ethers
    */
    function() public payable {
        emit ReceiveEther(msg.sender, msg.value);
    }

    /**
    * @dev perform a generic call to an arbitrary contract
    * @param _contract  the contract's address to call
    * @param _data ABI-encoded contract call to call `_contract` address.
    * @return the return bytes of the called contract's function.
    */
    function genericCall(address _contract,bytes _data) public onlyOwner {
        // solium-disable-next-line security/no-low-level-calls
        bool result = _contract.call(_data);
        // solium-disable-next-line security/no-inline-assembly
        assembly {
        // Copy the returned data.
        returndatacopy(0, 0, returndatasize)

        switch result
        // call returns 0 on error.
        case 0 { revert(0, returndatasize) }
        default { return(0, returndatasize) }
        }
    }

    /**
    * @dev send ethers from the avatar's wallet
    * @param _amountInWei amount to send in Wei units
    * @param _to send the ethers to this address
    * @return bool which represents success
    */
    function sendEther(uint _amountInWei, address _to) public onlyOwner returns(bool) {
        _to.transfer(_amountInWei);
        emit SendEther(_amountInWei, _to);
        return true;
    }

    /**
    * @dev external token transfer
    * @param _externalToken the token contract
    * @param _to the destination address
    * @param _value the amount of tokens to transfer
    * @return bool which represents success
    */
    function externalTokenTransfer(StandardToken _externalToken, address _to, uint _value)
    public onlyOwner returns(bool)
    {
        _externalToken.transfer(_to, _value);
        emit ExternalTokenTransfer(_externalToken, _to, _value);
        return true;
    }

    /**
    * @dev external token transfer from a specific account
    * @param _externalToken the token contract
    * @param _from the account to spend token from
    * @param _to the destination address
    * @param _value the amount of tokens to transfer
    * @return bool which represents success
    */
    function externalTokenTransferFrom(
        StandardToken _externalToken,
        address _from,
        address _to,
        uint _value
    )
    public onlyOwner returns(bool)
    {
        _externalToken.transferFrom(_from, _to, _value);
        emit ExternalTokenTransferFrom(_externalToken, _from, _to, _value);
        return true;
    }

    /**
    * @dev increase approval for the spender address to spend a specified amount of tokens
    *      on behalf of msg.sender.
    * @param _externalToken the address of the Token Contract
    * @param _spender address
    * @param _addedValue the amount of ether (in Wei) which the approval is referring to.
    * @return bool which represents a success
    */
    function externalTokenIncreaseApproval(StandardToken _externalToken, address _spender, uint _addedValue)
    public onlyOwner returns(bool)
    {
        _externalToken.increaseApproval(_spender, _addedValue);
        emit ExternalTokenIncreaseApproval(_externalToken, _spender, _addedValue);
        return true;
    }

    /**
    * @dev decrease approval for the spender address to spend a specified amount of tokens
    *      on behalf of msg.sender.
    * @param _externalToken the address of the Token Contract
    * @param _spender address
    * @param _subtractedValue the amount of ether (in Wei) which the approval is referring to.
    * @return bool which represents a success
    */
    function externalTokenDecreaseApproval(StandardToken _externalToken, address _spender, uint _subtractedValue )
    public onlyOwner returns(bool)
    {
        _externalToken.decreaseApproval(_spender, _subtractedValue);
        emit ExternalTokenDecreaseApproval(_externalToken,_spender, _subtractedValue);
        return true;
    }

}