??? ?? Unity? ??? ??

??? ??(DI)? ???? ???? ??? ???? ??? ? ?? ?? ??? ???? ?????. ????? ? ??. ??? ??? ?? ??? ???? ?????? ??? ??? ???? ???? ??? ?????.

??:

? ?? ???? TwitterAuth ? IAuthenticate ?????? ???? FacebookAuth:

public interface IAuthenticate
{
    bool Login(string user, string pass);
}

public class TwitterAuth : IAuthenticate
{
    bool Login(string user, string pass) { /* connect to twitter api */ }
}

public class FacebookAuth : IAuthenticate
{
    bool Login(string user, string pass) { /* connect to fb api */ }
}

????? ?? ???? ???? ??? ?????. ? ?? ?? ??(?: Twitter ?? Facebook)? ?? ?????.

??????? ??? ??:

? ?? ?? ??? ??? ??? ?? ??? ??? ???? ????. ??? ???? ? ?? ???? ?? ??? ???? ???? ??? ???? ???? ?? ?? ? ?? ?? ??? ??? ? ????.

??? ??? ??? ?? ??:

?? ??? ??? ??? ??? ?? ?? ??? ???? ????. ??:

?????:

public interface IAuthenticate
{
    bool Login(string user, string pass);
    bool AppliesTo(string providerName);
}

public interface IAuthenticateStrategy
{
    bool Login(string providerName, string user, string pass);
}

??? ??:

public class TwitterAuth : IAuthenticate
{
    bool Login(string user, string pass) { /* connect to twitter api */ }

    bool AppliesTo(string providerName)
    {
        return this.GetType().Name.Equals(providerName);
    }
}

public class FacebookAuth : IAuthenticate
{
    bool Login(string user, string pass) { /* connect to fb api */ }

    bool AppliesTo(string providerName)
    {
        return this.GetType().Name.Equals(providerName);
    }
}

? ???? IAuthenticate? ???? ?? ???? ????? ???? ?? name.

??:

public class AuthenticateStrategy : IAuthenticateStrategy
{
    private readonly IAuthenticate[] authenticateProviders;

    public AuthenticateStrategy(IAuthenticate[] authenticateProviders)
    {
        this.authenticateProviders = authenticateProviders;
    }

    public bool Login(string providerName, string user, string pass)
    {
        var provider = authenticateProviders.FirstOrDefault(x => x.AppliesTo(providerName));
        if (provider == null) throw new Exception("Login provider not registered");
        return provider.Login(user, pass);
    }
}

? ??? IAuthenticate ??? ??? ???? ??? ??? ?????. ??? ??? ???? ???? ?? ?? ???? ???? ??? ??? ??? ?????.

Unity ??:

unityContainer.RegisterType<IAuthenticate, TwitterAuth>("twitterAuth");
unityContainer.RegisterType<IAuthenticate, FacebookAuth>("facebookAuth");
unityContainer.RegisterType<IAuthenticateStrategy, AuthenticateStrategy>(
    new InjectionConstructor(
        new ResolvedArrayParameter<IAuthenticate>(
            new ResolvedParameter<IAuthenticate>("twitterAuth"),
            new ResolvedParameter<IAuthenticate>("facebookAuth")
        )
    ));

? ??? Unity? ?????. ??? ???? IAuthenticate ??? ???? ??? ??? ??? ???? AuthenticateStrategy? ?????. ????.

??:

private readonly IAuthenticateStrategy _authenticateStrategy;

public AuthenticateController(IAuthenticateStrategy authenticateStrategy)
{
    _authenticateStrategy = authenticateStrategy;
}

// login with twitter
public virtual ActionResult Twitter(string user, string pass)
{
    bool success = _authenticateStrategy.Login("TwitterAuth", user, pass);
}

// login with fb
public virtual ActionResult Facebook(string user, string pass)
{
    bool success = _authenticateStrategy.Login("FacebookAuth", user, pass);
}

AuthenticateStrategy? ????? ??? ?? ???? ???? ??? ??? ?????. ??.

??:

• ??? ???: Unity ??? ???? ??? ???? ????? ???? ?? ?????.
• ?? ?? ??: ??? ??? ??? ?????. ???? ??? ??? ???? ???? ???? ???.
• ??? ??: ?? ??? ???? ?? ?? ???? ?? ???? ? ?? ? ? ????.

? ??? Unity ??? ??? ?? ?? ???? ?? ??? ??? ??? ??? ? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!