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path: root/src/main/java/bitbucketpullrequestbuilder/bitbucketpullrequestbuilder/bitbucket/ApiClient.java
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package bitbucketpullrequestbuilder.bitbucketpullrequestbuilder.bitbucket;

import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.TypeReference;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import jenkins.model.Jenkins;
import hudson.ProxyConfiguration;

/**
 * Created by nishio
 */
public class ApiClient {
    private static final Logger logger = Logger.getLogger(ApiClient.class.getName());
    private static final String BITBUCKET_HOST = "bitbucket.org";
    private static final String V1_API_BASE_URL = "https://bitbucket.org/api/1.0/repositories/";
    private static final String V2_API_BASE_URL = "https://bitbucket.org/api/2.0/repositories/";
    private String owner;
    private String repositoryName;
    private Credentials credentials;

    public ApiClient(String username, String password, String owner, String repositoryName) {
        this.credentials = new UsernamePasswordCredentials(username, password);
        this.owner = owner;
        this.repositoryName = repositoryName;
    }

    public List<Pullrequest> getPullRequests() {
        try {
            return parse(get(v2("/pullrequests/")), Pullrequest.Response.class).getPullrequests();
        } catch(Exception e) {
            logger.log(Level.WARNING, "invalid pull request response.", e);
        }
        return Collections.EMPTY_LIST;
    }

    public List<Pullrequest.Comment> getPullRequestComments(String commentOwnerName, String commentRepositoryName, String pullRequestId) {
        try {
            return parse(get(v1("/pullrequests/" + pullRequestId + "/comments")), new TypeReference<List<Pullrequest.Comment>>() {});
        } catch(Exception e) {
            logger.log(Level.WARNING, "invalid pull request response.", e);
        }
        return Collections.EMPTY_LIST;
    }

    public void deletePullRequestComment(String pullRequestId, String commentId) {
        String path = V1_API_BASE_URL + this.owner + "/" + this.repositoryName + "/pullrequests/" + pullRequestId + "/comments/" + commentId;
        //https://bitbucket.org/api/1.0/repositories/{accountname}/{repo_slug}/pullrequests/{pull_request_id}/comments/{comment_id}
        delete(path);
    }


    public Pullrequest.Comment postPullRequestComment(String pullRequestId, String comment) {
        try {
            String response = post(
                v1("/pullrequests/" + pullRequestId + "/comments"),
                new NameValuePair[]{ new NameValuePair("content", comment) });
            return parse(response, Pullrequest.Comment.class);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    public void deletePullRequestApproval(String pullRequestId) {
        delete(v2("/pullrequests/" + pullRequestId + "/approve"));
    }

    public Pullrequest.Participant postPullRequestApproval(String pullRequestId) {
        try {
            return parse(post(v2("/pullrequests/" + pullRequestId + "/approve"),
                new NameValuePair[]{}), Pullrequest.Participant.class);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    private HttpClient getHttpClient() {
        HttpClient client = new HttpClient();
        if (Jenkins.getInstance() != null) {
            ProxyConfiguration proxy = Jenkins.getInstance().proxy;
            if (proxy != null) {
                logger.info("Jenkins proxy: " + proxy.name + ":" + proxy.port);
                client.getHostConfiguration().setProxy(proxy.name, proxy.port);
                String username = proxy.getUserName();
                String password = proxy.getPassword();
                // Consider it to be passed if username specified. Sufficient?
                if (username != null && !"".equals(username.trim())) {
                    logger.info("Using proxy authentication (user=" + username + ")");
                    client.getState().setProxyCredentials(AuthScope.ANY,
                        new UsernamePasswordCredentials(username, password));
                }
            }
        }
        return client;
    }

    private String v1(String url) {
        return V1_API_BASE_URL + this.owner + "/" + this.repositoryName + url;
    }

    private String v2(String url) {
        return V2_API_BASE_URL + this.owner + "/" + this.repositoryName + url;
    }

    private String get(String path) {
        return send(new GetMethod(path));
    }

    private String post(String path, NameValuePair[] data) {
        PostMethod req = new PostMethod(path);
        req.setRequestBody(data);
        return send(req);
    }

    private void delete(String path) {
         send(new DeleteMethod(path));
    }

    private String send(HttpMethodBase req) {
        HttpClient client = getHttpClient();
        client.getState().setCredentials(AuthScope.ANY, credentials);
        client.getParams().setAuthenticationPreemptive(true);
        try {
            client.executeMethod(req);
            return req.getResponseBodyAsString();
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    private <R> R parse(String response, Class<R> cls) throws IOException {
        return new ObjectMapper().readValue(response, cls);
    }
    private <R> R parse(String response, TypeReference<R> ref) throws IOException {
        return new ObjectMapper().readValue(response, ref);
    }
}