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package de.danoeh.antennapod.discovery;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
import de.danoeh.antennapod.BuildConfig;
import de.danoeh.antennapod.core.ClientConfig;
import de.danoeh.antennapod.core.service.download.AntennapodHttpClient;
import io.reactivex.Single;
import io.reactivex.SingleOnSubscribe;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class PodcastIndexPodcastSearcher implements PodcastSearcher {
private static final String PODCASTINDEX_API_URL = "https://api.podcastindex.org/api/1.0/search/byterm?q=%s";
public PodcastIndexPodcastSearcher() {
}
@Override
public Single<List<PodcastSearchResult>> search(String query) {
return Single.create((SingleOnSubscribe<List<PodcastSearchResult>>) subscriber -> {
Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
calendar.clear();
Date now = new Date();
calendar.setTime(now);
long secondsSinceEpoch = calendar.getTimeInMillis() / 1000L;
String apiHeaderTime = String.valueOf(secondsSinceEpoch);
String data4Hash = BuildConfig.PODCASTINDEX_API_KEY + BuildConfig.PODCASTINDEX_API_SECRET + apiHeaderTime;
String hashString = sha1(data4Hash);
String encodedQuery;
try {
encodedQuery = URLEncoder.encode(query, "UTF-8");
} catch (UnsupportedEncodingException e) {
// this won't ever be thrown
encodedQuery = query;
}
String formattedUrl = String.format(PODCASTINDEX_API_URL, encodedQuery);
OkHttpClient client = AntennapodHttpClient.getHttpClient();
Request.Builder httpReq = new Request.Builder()
.addHeader("X-Auth-Date", apiHeaderTime)
.addHeader("X-Auth-Key", BuildConfig.PODCASTINDEX_API_KEY)
.addHeader("Authorization", hashString)
.addHeader("User-Agent", ClientConfig.USER_AGENT)
.url(formattedUrl);
List<PodcastSearchResult> podcasts = new ArrayList<>();
try {
Response response = client.newCall(httpReq.build()).execute();
if (response.isSuccessful()) {
String resultString = response.body().string();
JSONObject result = new JSONObject(resultString);
JSONArray j = result.getJSONArray("feeds");
for (int i = 0; i < j.length(); i++) {
JSONObject podcastJson = j.getJSONObject(i);
PodcastSearchResult podcast = PodcastSearchResult.fromPodcastIndex(podcastJson);
if (podcast.feedUrl != null) {
podcasts.add(podcast);
}
}
} else {
subscriber.onError(new IOException(response.toString()));
}
} catch (IOException | JSONException e) {
subscriber.onError(e);
}
subscriber.onSuccess(podcasts);
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread());
}
@Override
public Single<String> lookupUrl(String url) {
return Single.just(url);
}
@Override
public boolean urlNeedsLookup(String url) {
return false;
}
@Override
public String getName() {
return "Podcastindex.org";
}
private static String sha1(String clearString) {
try {
MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
messageDigest.update(clearString.getBytes("UTF-8"));
return toHex(messageDigest.digest());
} catch (Exception ignored) {
ignored.printStackTrace();
return null;
}
}
private static String toHex(byte[] bytes) {
StringBuilder buffer = new StringBuilder();
for (byte b : bytes) {
buffer.append(String.format(Locale.getDefault(), "%02x", b));
}
return buffer.toString();
}
}
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