contract PLS is DSToken("PLS"), Controlled {

    function PLS() {
        setName("DACPLAY Token");
    }

    /// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
    ///  is approved by `_from`
    /// @param _from The address holding the tokens being transferred
    /// @param _to The address of the recipient
    /// @param _amount The amount of tokens to be transferred
    /// @return True if the transfer was successful
    function transferFrom(address _from, address _to, uint256 _amount
    ) returns (bool success) {
        // Alerts the token controller of the transfer
        if (isContract(controller)) {
            if (!TokenController(controller).onTransfer(_from, _to, _amount))
               throw;
        }

        success = super.transferFrom(_from, _to, _amount);

        if (success && isContract(_to))
        {
            // Refer Contract Interface ApproveAndCallFallBack, using keccak256 since sha3 has been deprecated.
            if(!_to.call(bytes4(bytes32(keccak256("receiveToken(address,uint256,address)"))), _from, _amount, this)) {
                // do nothing when error in call in case that the _to contract is not inherited from ReceiveAndCallFallBack
                // revert();
                // TODO: Log Some Event here to record the fail.
                // Even the fallback failed if there is such one, the transfer will not be revert since "revert()" is not called.
            }
        }
    }

    /*
     * ERC 223
     * Added support for the ERC 223 "tokenFallback" method in a "transfer" function with a payload.
     * https://github.com/ethereum/EIPs/issues/223
     * function transfer(address _to, uint256 _value, bytes _data) public returns (bool success);
     */

    /// @notice Send `_value` tokens to `_to` from `msg.sender` and trigger
    /// tokenFallback if sender is a contract.
    /// @dev Function that is called when a user or another contract wants to transfer funds.
    /// @param _to Address of token receiver.
    /// @param _value Number of tokens to transfer.
    /// @param _data Data to be sent to tokenFallback
    /// @return Returns success of function call.
    function transfer(
        address _to,
        uint256 _value,
        bytes _data)
        public
        returns (bool)
    {
        require(transfer(_to, _value));

        if (isContract(_to)) {
            ERC223ReceivingContract receiver = ERC223ReceivingContract(_to);
            receiver.tokenFallback(msg.sender, _value, _data);
        }

        return true;
    }

    /// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on
    ///  its behalf. This is a modified version of the ERC20 approve function
    ///  to be a little bit safer
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the approval was successful
    function approve(address _spender, uint256 _amount) returns (bool success) {
        // Alerts the token controller of the approve function call
        if (isContract(controller)) {
            if (!TokenController(controller).onApprove(msg.sender, _spender, _amount))
                throw;
        }
        
        return super.approve(_spender, _amount);
    }

    function mint(address _guy, uint _wad) auth stoppable {
        super.mint(_guy, _wad);

        Transfer(0, _guy, _wad);
    }
    function burn(address _guy, uint _wad) auth stoppable {
        super.burn(_guy, _wad);

        Transfer(_guy, 0, _wad);
    }

    /// @notice `msg.sender` approves `_spender` to send `_amount` tokens on
    ///  its behalf, and then a function is triggered in the contract that is
    ///  being approved, `_spender`. This allows users to use their tokens to
    ///  interact with contracts in one function call instead of two
    /// @param _spender The address of the contract able to transfer the tokens
    /// @param _amount The amount of tokens to be approved for transfer
    /// @return True if the function call was successful
    function approveAndCall(address _spender, uint256 _amount, bytes _extraData
    ) returns (bool success) {
        if (!approve(_spender, _amount)) throw;

        ApproveAndCallFallBack(_spender).receiveApproval(
            msg.sender,
            _amount,
            this,
            _extraData
        );

        return true;
    }

    /// @dev Internal function to determine if an address is a contract
    /// @param _addr The address being queried
    /// @return True if `_addr` is a contract
    function isContract(address _addr) constant internal returns(bool) {
        uint size;
        if (_addr == 0) return false;
        assembly {
            size := extcodesize(_addr)
        }
        return size>0;
    }

    /// @notice The fallback function: If the contract's controller has not been
    ///  set to 0, then the `proxyPayment` method is called which relays the
    ///  ether and creates tokens as described in the token controller contract
    function ()  payable {
        if (isContract(controller)) {
            if (! TokenController(controller).proxyPayment.value(msg.value)(msg.sender))
                throw;
        } else {
            throw;
        }
    }

//////////
// Safety Methods
//////////

    /// @notice This method can be used by the controller to extract mistakenly
    ///  sent tokens to this contract.
    /// @param _token The address of the token contract that you want to recover
    ///  set to 0 in case you want to extract ether.
    function claimTokens(address _token) onlyController {
        if (_token == 0x0) {
            controller.transfer(this.balance);
            return;
        }

        ERC20 token = ERC20(_token);
        uint balance = token.balanceOf(this);
        token.transfer(controller, balance);
        ClaimedTokens(_token, controller, balance);
    }

////////////////
// Events
////////////////

    event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);

}
function isContract(address _addr) constant internal returns(bool) {
        uint size;
        if (_addr == 0) return false;
        assembly {
            size := extcodesize(_addr)
        }
        return size>0;
    }
/// @dev Internal function to determine if an address is a contract
/// @param _addr The address being queried
/// @return True if `_addr` is a contract