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package com.example.gdg_opensource_codelab_sample_1;
import android.os.AsyncTask;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.Playlist;
import com.google.api.services.youtube.model.PlaylistItem;
import com.google.api.services.youtube.model.PlaylistItemListResponse;
import com.google.api.services.youtube.model.PlaylistListResponse;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.List;
public class YouTubeChannelClient {
/**
* Global instance of the HTTP transport.
*/
private static final HttpTransport HTTP_TRANSPORT = AndroidHttp.newCompatibleTransport();
/**
* Global instance of the JSON factory.
*/
private static final JsonFactory JSON_FACTORY = new GsonFactory();
private final String mApiKey;
private final String mChannelID;
private final YouTube mYouTube;
private GetListItemsTask mGetListTask;
private GetListsTask mGetListsTask;
private YouTubeChannelClient(String apiKey, String channelID) {
mApiKey = apiKey;
mChannelID = channelID;
mYouTube = new YouTube.Builder(HTTP_TRANSPORT, JSON_FACTORY,
new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
})
.setApplicationName("youtube-channel-list-client")
.build();
}
public static YouTubeChannelClient newYouTubeChannelClient(String apiKey, String channelID) {
return new YouTubeChannelClient(apiKey, channelID);
}
public void getPlayList(final Callbacks callbacks) {
cancelAsyncTaskIfNeeded(mGetListsTask);
mGetListsTask = new GetListsTask(mYouTube, mApiKey, mChannelID, callbacks);
mGetListsTask.execute();
}
public void getPlaylistItem(final String playListId, Callbacks callbacks) {
cancelAsyncTaskIfNeeded(mGetListTask);
mGetListTask = new GetListItemsTask(mYouTube, mApiKey, playListId, callbacks);
mGetListTask.execute();
}
private void cancelAsyncTaskIfNeeded(AsyncTask asyncTask) {
if (asyncTask != null && asyncTask.getStatus() != AsyncTask.Status.FINISHED) {
asyncTask.cancel(true);
}
}
private static class GetListsTask extends AsyncTask<Void, Void, List<Playlist>> {
private final String mChannelId;
private final YouTube mClient;
private final WeakReference<Callbacks> mCallbacksWeakReference;
private final String mApiKey;
public GetListsTask(YouTube client, String apiKey, String channelId,
Callbacks callbacks) {
mClient = client;
mApiKey = apiKey;
mChannelId = channelId;
mCallbacksWeakReference = new WeakReference<Callbacks>(callbacks);
}
@Override
protected List<Playlist> doInBackground(Void... params) {
PlaylistListResponse searchListResponse = null;
try {
YouTube.Playlists.List request = mClient.playlists().list("snippet");
request.setKey(mApiKey);
request.setChannelId(mChannelId);
request.setMaxResults(50L);
searchListResponse = request.execute();
} catch (IOException e) {
e.printStackTrace();
}
return searchListResponse == null ? null : searchListResponse.getItems();
}
@Override
protected void onPostExecute(List<Playlist> playlists) {
if (mCallbacksWeakReference.get() != null) {
mCallbacksWeakReference.get().onLoadPlaylist(playlists);
}
}
}
private static class GetListItemsTask extends AsyncTask<Void, Void, List<PlaylistItem>> {
private final String mPlayListId;
private final String mApiKey;
private final YouTube mClient;
private final WeakReference<Callbacks> mCallbacksWeakReference;
public GetListItemsTask(YouTube client, String apiKey, String playlistId,
Callbacks callbacks) {
mPlayListId = playlistId;
mApiKey = apiKey;
mClient = client;
mCallbacksWeakReference = new WeakReference<Callbacks>(callbacks);
}
@Override
protected List<PlaylistItem> doInBackground(Void... params) {
PlaylistItemListResponse playlistItemListResponse = null;
try {
YouTube.PlaylistItems.List request = mClient.playlistItems().list(
"snippet, contentDetails");
request.setPlaylistId(mPlayListId);
request.setKey(mApiKey);
request.setMaxResults(50L);
playlistItemListResponse = request.execute();
} catch (IOException e) {
e.printStackTrace();
}
return playlistItemListResponse == null ? null
: playlistItemListResponse.getItems();
}
@Override
protected void onPostExecute(List<PlaylistItem> playlist) {
if (mCallbacksWeakReference.get() != null) {
mCallbacksWeakReference.get().onLoadPlaylistItem(mPlayListId, playlist);
}
}
}
public interface Callbacks {
public void onLoadPlaylist(List<Playlist> playlist);
public void onLoadPlaylistItem(String playlistId, List<PlaylistItem> playlistItem);
}
}
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