YoutubeOraclesTester.sol

pragma solidity ^0.4.0;
import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";

interface YoutubeViewsReceiver {
    function updateYoutubeViewsInternal(uint videoViews);
}

interface YoutubeLikesReceiver {
    function updateYoutubeLikesInternal(uint videoLikes);
}

contract YoutubeViewsOracle is usingOraclize {
    
    uint public viewsCount;
    string internal apiKey;
    string internal url;
    YoutubeViewsReceiver receiver;
    
    event newOraclizeQuery(string description);
    event newYoutubeViewsCount(uint views);

    function YoutubeViewsOracle(YoutubeViewsReceiver receiverAddress) payable public {
        apiKey = 'API_KEY'; // TODO: Get from constructor's parameter or somewhere else
        receiver = receiverAddress;
    }
    
    function () public payable {}
    
    function __callback(bytes32 myid, string result) public {
        if (msg.sender != oraclize_cbAddress()) throw;
        viewsCount = parseInt(result);
        newYoutubeViewsCount(viewsCount);
        receiver.updateYoutubeViewsInternal(viewsCount);
    }
    
    function update(string videoId) public payable {
        newOraclizeQuery("Oraclize query was sent, standing by for the answer..");
        url = strConcat('json(https://www.googleapis.com/youtube/v3/videos?part=statistics&id=', videoId, '&key=', apiKey, ').items.0.statistics.viewCount');
        oraclize_query('URL', url);
    }
    
}

contract YoutubeLikesOracle is usingOraclize {
    
    uint public likesCount;
    string internal apiKey;
    string internal url;
    YoutubeLikesReceiver receiver;
    
    event newOraclizeQuery(string description);
    event newYoutubeLikesCount(uint likes);

    function YoutubeLikesOracle(YoutubeLikesReceiver receiverAddress) payable public {
        apiKey = 'API_KEY'; // TODO: Get from constructor's parameter or somewhere else
        receiver = receiverAddress;
    }
    
    function () public payable {}
    
    function __callback(bytes32 myid, string result) public {
        if (msg.sender != oraclize_cbAddress()) throw;
        likesCount = parseInt(result);
        newYoutubeLikesCount(likesCount);
        receiver.updateYoutubeLikesInternal(likesCount);
    }
    
    function update(string videoId) public payable {
        newOraclizeQuery("Oraclize query was sent, standing by for the answer..");
        url = strConcat('json(https://www.googleapis.com/youtube/v3/videos?part=statistics&id=', videoId, '&key=', apiKey, ').items.0.statistics.likeCount');
        oraclize_query('URL', url);
    }
    
}

contract YoutubeOraclesTester {
    uint public views;
    uint public likes;
    YoutubeViewsOracle yvOracle;
    YoutubeLikesOracle ylOracle;
    
    function YoutubeOraclesTester() public {
        yvOracle = new YoutubeViewsOracle(YoutubeViewsReceiver(this));
        ylOracle = new YoutubeLikesOracle(YoutubeLikesReceiver(this));
    }
    
    function updateYoutubeStats(string videoId) public {
        yvOracle.update(videoId);
        ylOracle.update(videoId);
    }
    
    function updateYoutubeViewsInternal(uint videoViews) public {
        require(msg.sender == address(yvOracle));
        views = videoViews;
    }
    
    function updateYoutubeLikesInternal(uint videoLikes) public {
        require(msg.sender == address(ylOracle));
        likes = videoLikes;
    }

}