pragma solidity ^0.4.18;

interface ERC20 {
    function transferFrom(address _from, address _to, uint _value) external returns (bool);
    function approve(address _spender, uint _value) external returns (bool);
    function allowance(address _owner, address _spender) external constant returns (uint);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

interface ERC223 {
    function transfer(address _to, uint _value, bytes _data) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value, bytes indexed data);
}

contract ERC223ReceivingContract {
    function tokenFallback(address _from, uint _value, bytes _data) public;
}

contract Token {
    string internal _symbol;
    string internal _name;
    uint8 internal _decimals;
    uint internal _totalSupply = 100000000000000000;
    mapping (address => uint) internal _balanceOf;
    mapping (address => mapping (address => uint)) internal _allowances;
    
    constructor(string symbol, string name, uint8 decimals, uint totalSupply) public {
        _symbol = symbol;
        _name = name;
        _decimals = decimals;
        _totalSupply = totalSupply;
    }
    
    function name() public constant returns (string) {
        return _name;
    }
    
    function symbol() public constant returns (string) {
        return _symbol;
    }
    
    function decimals() public constant returns (uint8) {
        return _decimals;
    }
    
    function totalSupply() public constant returns (uint) {
        return _totalSupply;
    }
    
    function balanceOf(address _addr) public constant returns (uint);
    function transfer(address _to, uint _value) public returns (bool);
    event Transfer(address indexed _from, address indexed _to, uint _value);
}

library SafeMath {
    /**
     * @dev Multiplies two unsigned integers, reverts on overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring '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;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
     * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Adds two unsigned integers, reverts on overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
     * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
     * reverts when dividing by zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

contract AllPointPay is Token("APP", "AllPointPay", 8, 100000000000000000), ERC20, ERC223 {
    using SafeMath for uint;

    constructor() public {
        _balanceOf[msg.sender] = _totalSupply;
    }
    
    function totalSupply() public constant returns (uint) {
        return _totalSupply;
    }
    
    function balanceOf(address _addr) public constant returns (uint) {
        return _balanceOf[_addr];
    }

    function transfer(address _to, uint _value) public returns (bool) {
        if (_value > 0 && 
            _value <= _balanceOf[msg.sender] &&
            !isContract(_to)) {
            _balanceOf[msg.sender] -= _value;
            _balanceOf[_to] += _value;
            emit Transfer(msg.sender, _to, _value);
            return true;
        }
        return false;
    }

    function transfer(address _to, uint _value, bytes _data) external returns (bool) {
        if (_value > 0 && 
            _value <= _balanceOf[msg.sender] &&
            isContract(_to)) {
            _balanceOf[msg.sender] -= _value;
            _balanceOf[_to] += _value;
            ERC223ReceivingContract _contract = ERC223ReceivingContract(_to);
                _contract.tokenFallback(msg.sender, _value, _data);
            emit Transfer(msg.sender, _to, _value, _data);
            return true;
        }
        return false;
    }

    function isContract(address _addr) public view returns (bool) {
        uint codeSize;
        assembly {
            codeSize := extcodesize(_addr)
        }
        return codeSize > 0;
    }

    function transferFrom(address _from, address _to, uint _value) public returns (bool) {
        if (_allowances[_from][msg.sender] > 0 &&
            _value > 0 &&
            _allowances[_from][msg.sender] >= _value &&
            _balanceOf[_from] >= _value) {
            _balanceOf[_from] -= _value;
            _balanceOf[_to] += _value;
            _allowances[_from][msg.sender] -= _value;
            emit Transfer(_from, _to, _value);
            return true;
        }
        return false;
    }
    
    function approve(address _spender, uint _value) public returns (bool) {
        _allowances[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }
    
    function allowance(address _owner, address _spender) public constant returns (uint) {
        return _allowances[_owner][_spender];
    }
}