TSTU-Student-App-Android/app/src/main/java/ru/defend/defdevteam/tstu/FeedController.java

package ru.defend.defdevteam.tstu;


/**
 * Created by thedefend on 29.11.16.
 */

public class FeedController implements FeedReader.ReaderCallback, FeedParser.ParserCallback{

    private FeedReader feedReader;
    private FeedParser parser;
    private FeedUpdater feedUpdater;
    NewsItemList newsItemList;
    private int updateRate; //in minutes
    private CabinetActivity activity;

    FeedController(CabinetActivity activity, int updateRate) {
        this(activity, updateRate, "http://press.tstu.ru/?format=feed");
    }

    FeedController(CabinetActivity activity, int updateRate, String rssUrl) {
        this.activity = activity;
        this.updateRate = updateRate;
        feedReader = new FeedReader(this, rssUrl);
        newsItemList = new NewsItemList();
        feedUpdater = new FeedUpdater();
        parser = new FeedParser();
        feedReader.registerCallback(this);
        parser.registerCallback(this);
        feedUpdater.start();
    }

    private void startFeedReader() {
        switch (feedReader.getThreadState()) {
            case THREAD_FAIL:
                feedReader.start();
                break;
            case THREAD_NULL:
                feedReader.start();
                break;
        }
    }

    private class FeedUpdater extends Thread {
        @Override
        public void run() {
            startFeedReader();
            try {
                sleep(updateRate*60*1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        public FeedUpdater() {
        }
    }

    public void addNewsList(String title, String text, String link) {
        newsItemList.add(new NewsItemGroup(title, text, link));
    }


    public void drawNewsList(NewsItemList newsItemList) {
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                activity.clearNewsFeed();
            }
        });
        NewsItemGroup array[] = newsItemList.toArray();
        for (int i = 0; i < array.length; i++) {
            final NewsItemGroup item = array[i];
            if(i < newsItemList.size() - 1) {
                activity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        activity.addNewsItem(item, false);
                    }
                });
            } else {
                activity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        activity.addNewsItem(item, true);
                    }
                });
            }
        }
    }

    @Override
    public void onSuccess(final String result){
        parser.parseXML(result);
    }

    @Override
    public void onFailure(){
        //Ill add this code later!
    }

    @Override
    public void onSuccessParsing() {
        drawNewsList(newsItemList);
    }

    @Override
    public void onFailureParsing() {
        //Ill add this code later!
    }

    @Override
    public void contentDispatcher(String title, String text, String link) {
        addNewsList(title, text, link);
    }



}