package eu.wikijourney.wikijourney.functions;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;
import com.squareup.picasso.Picasso;
import eu.wikijourney.wikijourney.GlobalState;
import eu.wikijourney.wikijourney.R;
import eu.wikijourney.wikijourney.views.PoiListFragment;
import eu.wikijourney.wikijourney.views.WebFragment;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Locale;
import cz.msebera.android.httpclient.Header;
/**
* Adapter linking the POI RecyclerView to the CardViews
* Created by Thomas on 07/08/2015.
*/
public class PoiListAdapter extends RecyclerView.Adapter<PoiListAdapter.ViewHolder> {
private final ArrayList<POI> mPoiList;
private final Context context;
private final PoiListFragment mPoiListFragment;
private final GlobalState gs;
// This can be used to retrieve the first lines, or summary, of a Wikipedia article
private String WP_URL_PREFIX = "https://";
private String language;
private String WP_URL_TEXT = ".wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles=";
public final static String EXTRA_URL = "com.wikijourney.wikijourney.POI_URL";
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// The components of one CardView
private final ImageView mPoiPicture;
private final TextView mPoiTitle;
private final TextView mPoiDescription;
private final Button mReadMoreButton;
private ViewHolder(View v) {
super(v);
mPoiPicture = (ImageView) v.findViewById(R.id.poi_picture);
mPoiTitle = (TextView) v.findViewById(R.id.poi_title);
mPoiDescription = (TextView) v.findViewById(R.id.poi_description);
mReadMoreButton = (Button) v.findViewById(R.id.read_more_button);
}
}
/**
* Public constructor for the PoiListAdapter
* @param pContext The context of the View. It is needed for Picasso to display the WP article image.
* @param poiListFragment The Fragment containing the PoiList. It is needed to change Fragments with the FragmentManager.
*/
public PoiListAdapter(Context pContext, PoiListFragment poiListFragment) {
this.context = pContext;
this.mPoiListFragment = poiListFragment;
this.gs = ((GlobalState) pContext.getApplicationContext());
this.mPoiList = gs.getPoiList();
this.language = Locale.getDefault().getLanguage();
}
// Create new views (invoked by the layout manager)
@Override
public PoiListAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.poi_card_view, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from the PoiList at this position
// - replace the contents of the view with that element
String poiName = gs.getPoiList().get(position).getName();
final String mPoiSitelink = mPoiList.get(position).getSitelink();
String mPoiImageUrl = mPoiList.get(position).getImageUrl();
String mPoiDescription = mPoiList.get(position).getDescription();
// We add a Listener, so that a tap on the card opens a WebView to the WP page
if (mPoiSitelink != null && !"".equals(mPoiSitelink)) {
holder.mReadMoreButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
WebFragment webFragment = new WebFragment();
Bundle args = new Bundle();
args.putString(EXTRA_URL, mPoiSitelink);
webFragment.setArguments(args);
FragmentTransaction transaction = mPoiListFragment.getFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, webFragment);
transaction.addToBackStack(null);
transaction.commit();
}
});
}
if (poiName != null) {
holder.mPoiTitle.setText(poiName);
if (mPoiDescription == null) {
downloadWikipediaExtract(holder, poiName, position);
} else if ("".equals(mPoiDescription)) {
holder.mPoiDescription.setVisibility(View.GONE);
} else {
holder.mPoiDescription.setVisibility(View.VISIBLE);
holder.mPoiDescription.setText(mPoiDescription);
}
}
holder.mPoiPicture.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.logo_cut));
// We use Picasso to download the Wikipedia article image
if (mPoiImageUrl != null && !"".equals(mPoiImageUrl)) {
displayArticleImage(holder, mPoiImageUrl);
}
}
private void downloadWikipediaExtract(final ViewHolder holder, String poiName, final int position) {
// Download from the WP API
AsyncHttpClient client = new AsyncHttpClient();
client.setTimeout(10_000); // Set timeout to 10s
String url = null;
try {
url = WP_URL_PREFIX + language + WP_URL_TEXT + URLEncoder.encode(poiName, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
client.get(context, url, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
String page_id;
String extract;
try {
page_id = response.getJSONObject("query").getJSONObject("pages").names().getString(0);
extract = response.getJSONObject("query").getJSONObject("pages").getJSONObject(page_id).getString("extract");
if (!"".equals(extract)) {
holder.mPoiDescription.setVisibility(View.VISIBLE);
holder.mPoiDescription.setText(extract);
}
gs.getPoiList().get(position).setDescription(extract);
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onProgress(long bytesWritten, long totalSize) {
Log.d("progress", "Downloading " + bytesWritten + " of " + totalSize);
}
@Override
public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
try {
Log.e("Error", errorResponse.toString());
} catch (Exception e) {
Log.e("Error", "Error while downloading the Wikipedia extract");
}
}
@Override
public void onRetry(int retryNo) {
Log.e("Error", "Retrying for the " + retryNo + " time");
super.onRetry(retryNo);
}
});
}
private void displayArticleImage(ViewHolder holder, String mPoiImageUrl) {
Picasso.with(context).load(mPoiImageUrl)
.placeholder(R.drawable.logo_cut)
.fit()
.centerCrop()
.into(holder.mPoiPicture);
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mPoiList.size();
}
}
