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Sharing.sol

pragma solidity ^0.4.11;



contract ExampleContract {
    
    struct ShareEntry
    {
        address sharedAddress;
        // 0 = No respone, 1 = Appoved, 2 = Rejected
        int state;
    }
    
    string private _data;
    bytes private _hash;
    address private _creator;
    address private _student;
    ShareEntry[] private _sharedAdresses;
    
    function ProtoypeEmpData(string data, bytes hash, address student) public {
        _data = data;
        _hash = hash;
        _creator = msg.sender;
        _student = student;
    }
    
    function char(byte b) constant private returns (byte c) {
        if (b < 10) return byte(uint8(b) + 0x30);
        else return byte(uint8(b) + 0x57);
    }

    function toString(address toConvert) constant public returns (string){
        
        bytes memory s = new bytes(40);
        
        for (uint i = 0; i < 20; i++) {
            byte b = byte(uint8(uint(toConvert) / (2**(8*(19 - i)))));
            byte hi = byte(uint8(b) / 16);
            byte lo = byte(uint8(b) - 16 * uint8(hi));
            s[2*i] = char(hi);
            s[2*i+1] = char(lo);            
        }
        
        return string(s);
    }
    
    function ShareWithAddress(address shared) public returns (bool)
    {
        if(msg.sender == _student)
        {
            _sharedAdresses.push(ShareEntry(shared, 0));
            return true;
        }
        
        return false;
    }
    
    function RespondRequest(address appvoed, bool response) public returns (bool)
    {
        for(uint256 i = 0; i < _sharedAdresses.length; i++)
        {
            if(_sharedAdresses[i].sharedAddress == appvoed)
            {
                if(response)
                    _sharedAdresses[i].state = 1;
                else
                    _sharedAdresses[i].state = 2;
            }
        }
    }
    
    function getShareRecords() constant public returns (string)
    {
        string result ;
        
        for(uint256 i = 0; i < _sharedAdresses.length; i++)
        {
            if(_sharedAdresses[i].state == 0)
            {
                //result += toString(_sharedAdresses[i].sharedAddress);
            }
        }
    }
    
    function getHash() constant public returns (bytes){
        return _hash;
    }
    
    function getData() constant public returns (string){
        return _data;
    }
}