/*
 * Copyright 2012 Nodeable Inc
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.streamreduce.oauth.api;

import org.scribe.builder.api.DefaultApi20;
import org.scribe.model.OAuthConfig;
import org.scribe.utils.OAuthEncoder;
import org.scribe.utils.Preconditions;

public class GitHubApi extends DefaultApi20 {

    private static final String AUTHORIZE_URL = "https://github.com/login/oauth/authorize?client_id=%s&redirect_uri=%s";
    @SuppressWarnings("unused")
    private static final String SCOPED_AUTHORIZE_URL = AUTHORIZE_URL + "&scope=%s";
    private static final String ACCESS_TOKEN_URL = "https://github.com/login/oauth/access_token";


    @Override
    public String getAccessTokenEndpoint() {
        return ACCESS_TOKEN_URL;
    }

    @Override
    public String getAuthorizationUrl(OAuthConfig config) {
        Preconditions.checkValidUrl(config.getCallback(), "Must provide a valid url as callback.");

        // Append scope if present
        if (config.hasScope()) {
            return String.format(SCOPED_AUTHORIZE_URL, config.getApiKey(), OAuthEncoder.encode(config.getCallback()), OAuthEncoder.encode(config.getScope()));
        }
        else {
            return String.format(AUTHORIZE_URL, config.getApiKey(), OAuthEncoder.encode(config.getCallback()));
        }
    }
}