/src/main/java/com/atlassian/jira/plugins/bitbucket/spi/github/GithubChangesetFactory.java

package com.atlassian.jira.plugins.bitbucket.spi.github;



import com.atlassian.jira.plugins.bitbucket.api.Changeset;

import com.atlassian.jira.plugins.bitbucket.api.ChangesetFile;

import com.atlassian.jira.plugins.bitbucket.api.SourceControlException;

import com.atlassian.jira.plugins.bitbucket.spi.CustomStringUtils;

import com.atlassian.jira.plugins.bitbucket.spi.DefaultBitbucketChangeset;

import com.atlassian.jira.plugins.bitbucket.spi.DefaultBitbucketChangesetFile;

import com.atlassian.jira.util.json.JSONArray;

import com.atlassian.jira.util.json.JSONException;

import com.atlassian.jira.util.json.JSONObject;



import javax.xml.bind.DatatypeConverter;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;



/**

 * Factory for {@link com.atlassian.jira.plugins.bitbucket.api.Changeset} implementations

 */

public class GithubChangesetFactory

{



    /**

     * Parse the json object as a bitbucket changeset

     *

     * @param json  the json object describing the change

     * @return the parsed {@link com.atlassian.jira.plugins.bitbucket.api.Changeset}

     */

    public static Changeset parse(int repositoryId, String branch, JSONObject json)

    {

        try

        {



            JSONObject commitJson = json.getJSONObject("commit");



            String name = "";

            Date date = Calendar.getInstance().getTime();

            if (commitJson.has("author") && !commitJson.isNull("author"))

            {

                JSONObject commitAuthor = commitJson.getJSONObject("author");

                name = commitAuthor.has("name") ? commitAuthor.getString("name") : "";

                date = parseDate(commitAuthor.getString("date"));

            }





            String login = "";

            if (json.has("author") && !json.isNull("author"))

            {

                JSONObject author = json.getJSONObject("author");

                login = author.has("login") ? author.getString("login") : "";

            }



            List<ChangesetFile> changesetFiles = fileList(json.getJSONArray("files"), false);



            return new DefaultBitbucketChangeset(

                    repositoryId,

                    json.getString("sha"),

                    name,

                    login,

                    date,

                    "", // todo: raw-node. what is it in github?

                    branch,

                    commitJson.getString("message"),

                    parentList(json.getJSONArray("parents")),

                    changesetFiles,

                    changesetFiles.size()

            );

        }



        catch (JSONException e)

        {

            throw new SourceControlException("invalid json object", e);

        }

    }



    public static Date parseDate(String dateStr) {

        // Atom (ISO 8601) example: 2011-11-09T06:24:13-08:00



        try {

            Calendar calendar = DatatypeConverter.parseDateTime(dateStr);

            return calendar.getTime();

        } catch (IllegalArgumentException e) {

            throw new SourceControlException("Could not parse date string from JSON.", e);

        }



    }





    private static List<String> parentList(JSONArray parents) throws JSONException

    {

        List<String> list = new ArrayList<String>();

        for (int i = 0; i < parents.length(); i++)

            list.add(((JSONObject) parents.get(i)).getString("sha"));

        return list;

    }



    private static List<ChangesetFile> fileList(JSONArray files, boolean fromPostcommitHook) throws JSONException

    {

        List<ChangesetFile> list = new ArrayList<ChangesetFile>();



        for (int i = 0; i < files.length(); i++)

        {

            JSONObject file = files.getJSONObject(i);

            String filename = file.getString("filename");

            String status = file.getString("status");

            int additions = file.getInt("additions");

            int deletions = file.getInt("deletions");



            list.add(new DefaultBitbucketChangesetFile(CustomStringUtils.getChangesetFileAction(status),

                    filename, additions, deletions));

        }



        return list;

    }





    private GithubChangesetFactory()

    {

    }

}