pragma solidity ^0.4.15;

contract Utils {
    /**
        constructor
    */
    function Utils() internal {
    }

    // validates an address - currently only checks that it isn't null
    modifier validAddress(address _address) {
        require(_address != 0x0);
        _;
    }

    // verifies that the address is different than this contract address
    modifier notThis(address _address) {
        require(_address != address(this));
        _;
    }

    // Overflow protected math functions

    /**
        @dev returns the sum of _x and _y, asserts if the calculation overflows

        @param _x   value 1
        @param _y   value 2

        @return sum
    */
    function safeAdd(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x + _y;
        assert(z >= _x);
        return z;
    }

    /**
        @dev returns the difference of _x minus _y, asserts if the subtraction results in a negative number

        @param _x   minuend
        @param _y   subtrahend

        @return difference
    */
    function safeSub(uint256 _x, uint256 _y) internal pure returns (uint256) {
        assert(_x >= _y);
        return _x - _y;
    }

    /**
        @dev returns the product of multiplying _x by _y, asserts if the calculation overflows

        @param _x   factor 1
        @param _y   factor 2

        @return product
    */
    function safeMul(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x * _y;
        assert(_x == 0 || z / _x == _y);
        return z;
    }
}

/*
    ERC20 Standard Token interface
*/
contract IERC20Token {
    // these functions aren't abstract since the compiler emits automatically generated getter functions as external
    function name() public constant returns (string) { name; }
    function symbol() public constant returns (string) { symbol; }
    function decimals() public constant returns (uint8) { decimals; }
    function totalSupply() public constant returns (uint256) { totalSupply; }
    function balanceOf(address _owner) public constant returns (uint256 balance);
    function allowance(address _owner, address _spender) public constant returns (uint256 remaining);

    function transfer(address _to, uint256 _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
    function approve(address _spender, uint256 _value) public returns (bool success);
}


/*
    Owned contract interface
*/
contract IOwned {
    // this function isn't abstract since the compiler emits automatically generated getter functions as external
    function owner() public constant returns (address) { owner; }

    function transferOwnership(address _newOwner) public;
    function acceptOwnership() public;
}

/*
    Provides support and utilities for contract ownership
*/
contract Owned is IOwned {
    address public owner;
    address public newOwner;

    event OwnerUpdate(address _prevOwner, address _newOwner);

    /**
        @dev constructor
    */
    function Owned() public {
        owner = msg.sender;
    }

    // allows execution by the owner only
    modifier ownerOnly {
        assert(msg.sender == owner);
        _;
    }

    /**
        @dev allows transferring the contract ownership
        the new owner still needs to accept the transfer
        can only be called by the contract owner

        @param _newOwner    new contract owner
    */
    function transferOwnership(address _newOwner) public ownerOnly {
        require(_newOwner != owner);
        newOwner = _newOwner;
    }

    /**
        @dev used by a new owner to accept an ownership transfer
    */
    function acceptOwnership() public {
        require(msg.sender == newOwner);
        OwnerUpdate(owner, newOwner);
        owner = newOwner;
        newOwner = 0x0;
    }
}

contract YooStop is Owned{

    bool public stopped = false;

    modifier stoppable {
        assert (!stopped);
        _;
    }
    function stop() public ownerOnly{
        stopped = true;
    }
    function start() public ownerOnly{
        stopped = false;
    }

}


contract YoobaEarlyInvest is  Owned,YooStop,Utils {
    IERC20Token public yoobaTokenAddress;


    /**
        @dev constructor
        
    */
    function YoobaEarlyInvest(IERC20Token _yoobaTokenAddress) public{
        yoobaTokenAddress = _yoobaTokenAddress;
    }
    

    
    function withdrawTo(address _to, uint256 _amount)
        public ownerOnly stoppable
        notThis(_to)
    {   
        require(_amount <= this.balance);
        _to.transfer(_amount); // send the amount to the target account
    }
    
    function withdrawERC20TokenTo(IERC20Token _token, address _to, uint256 _amount)
        public
        ownerOnly
        validAddress(_token)
        validAddress(_to)
        notThis(_to)
    {
        assert(_token.transfer(_to, _amount));

    }
    
    function buyToken() internal
    {
        require(!stopped && msg.value >= 0.1 ether);
        uint256  amount = msg.value * 350000;
        assert(yoobaTokenAddress.transfer(msg.sender, amount));
    }

    function() public payable stoppable {
        buyToken();
    }
}