org.liberty.android.fantastischmemo.downloader.FEDirectory.java Source code

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Here is the source code for org.liberty.android.fantastischmemo.downloader.FEDirectory.java

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/*
Copyright (C) 2010 Haowen Ning
    
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    
See the GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    
*/
package org.liberty.android.fantastischmemo.downloader;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.inject.Inject;

import org.json.JSONArray;
import org.json.JSONObject;
import org.liberty.android.fantastischmemo.R;
import org.liberty.android.fantastischmemo.utils.AMGUIUtility;

import android.content.Intent;
import android.util.Log;
import android.widget.ListView;

/* Show FlashcardExchange's directory */
public class FEDirectory extends DownloaderBase {
    private DownloadListAdapter dlAdapter;
    private static final String TAG = "org.liberty.android.fantastischmemo.downloader.DownloaderFE";
    private static final String FE_API_KEY = "anymemo_android";

    private static final String FE_API_DIRECTORY = "http://api.cram.com/v1/get_directory?api_key=" + FE_API_KEY;

    private DownloaderUtils downloaderUtils;

    @Inject
    public void setDownloaderUtils(DownloaderUtils downloaderUtils) {
        this.downloaderUtils = downloaderUtils;
    }

    @Override
    protected void initialRetrieve() {
        dlAdapter = new DownloadListAdapter(this, R.layout.filebrowser_item);
        ListView listView = (ListView) findViewById(R.id.file_list);
        listView.setAdapter(dlAdapter);

        AMGUIUtility.doProgressTask(this, R.string.loading_please_wait, R.string.loading_connect_net,
                new AMGUIUtility.ProgressTask() {
                    private List<DownloadItem> dil;

                    public void doHeavyTask() throws Exception {
                        dil = retrieveList();
                    }

                    public void doUITask() {
                        dlAdapter.addList(dil);
                    }
                });
    }

    @Override
    protected void openCategory(DownloadItem di) {
        String tag = di.getTitle();
        Intent myIntent = new Intent(this, DownloaderFE.class);
        myIntent.setAction(DownloaderFE.INTENT_ACTION_SEARCH_TAG);
        myIntent.putExtra("search_criterion", tag);
        startActivity(myIntent);
    }

    @Override
    protected DownloadItem getDownloadItem(int position) {
        return dlAdapter.getItem(position);
    }

    @Override
    protected void goBack() {
        /* Just go back, do nothing */
        finish();
    }

    @Override
    protected void fetchDatabase(DownloadItem di) {
        throw new AssertionError("Should not call this method");
    }

    private List<DownloadItem> retrieveList() throws Exception {
        List<DownloadItem> diList = new ArrayList<DownloadItem>();
        String url = FE_API_DIRECTORY;
        String jsonString = downloaderUtils.downloadJSONString(url);
        JSONObject jsonObject = new JSONObject(jsonString);
        String status = jsonObject.getString("response_type");
        Log.v(TAG, "JSON String: " + jsonString);
        if (!status.equals("ok")) {
            Log.v(TAG, "JSON String: " + jsonString);
            throw new IOException("Status is not OK. Status: " + status);
        }
        JSONArray directoryArray = jsonObject.getJSONArray("results");
        /*
         * Each result has tags which is an array containing
         * tags and a string of tag group title
         */
        for (int i = 0; i < directoryArray.length(); i++) {
            JSONArray tagsArray = directoryArray.getJSONObject(i).getJSONArray("tags");
            for (int j = 0; j < tagsArray.length(); j++) {
                JSONObject jsonItem = tagsArray.getJSONObject(j);
                String s = jsonItem.getString("tag");
                DownloadItem di = new DownloadItem(DownloadItem.ItemType.Database, s, "", "");
                di.setType(DownloadItem.ItemType.Category);
                diList.add(di);
            }
        }
        return diList;
    }

}