GoogleAuthService

GoogleAuthService.groovy

class GoogleAuthService extends GrailsOAuthService {

    @Override
    OAuthService createOAuthService(String callbackUrl) {
        def builder = createServiceBuilder(GoogleApi20,
                grailsApplication.config.auth.google.key as String,
                grailsApplication.config.auth.google.secret as String,
                callbackUrl)
        return builder.grantType(OAuthConstants.AUTHORIZATION_CODE)
               .scope('https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email')
               .build()
    }

    AuthInfo getAuthInfo(String callbackUrl) {
        OAuthService authService = createOAuthService(callbackUrl)
        new AuthInfo(authUrl: authService.getAuthorizationUrl(null), service: authService)
    }

    Token getAccessToken(OAuthService authService, Map params, Token requestToken) {
	Verifier verifier = new Verifier(params.code)
	authService.getAccessToken(requestToken, verifier)
    }

}


public abstract class GrailsOAuthService {

    static transactional = false

    OAuthService oauthService
    def grailsApplication

    @Override
    ServiceBuilder createServiceBuilder(Class provider, String apiKey, String secretKey, String callbackUrl) {
        def ServiceBuilder builder = new ServiceBuilder().provider(provider)
                    .apiKey(apiKey).apiSecret(secretKey)
                    .callback(callbackUrl)
        return builder
    }

    abstract AuthInfo getAuthInfo(String callbackUrl)

    abstract Token getAccessToken(OAuthService authService, Map params, Token requestToken)

    abstract OAuthProfile getProfile(OAuthService authService, Token accessToken)

}

class AuthInfo {
    OAuthService service
    String authUrl
    Token requestToken
}