Add SoundCloud service (#15)

Add SoundCloud service

services/soundcloud/SoundcloudSuggestionExtractor.java

@@ -0,0 +1,46 @@
+package org.schabi.newpipe.extractor.services.soundcloud;
+
+import java.io.IOException;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.schabi.newpipe.extractor.Downloader;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.SuggestionExtractor;
+import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.utils.Parser.RegexException;
+
+public class SoundcloudSuggestionExtractor extends SuggestionExtractor {
+
+    public static final String CHARSET_UTF_8 = "UTF-8";
+
+    public SoundcloudSuggestionExtractor(int serviceId) {
+        super(serviceId);
+    }
+
+    @Override
+    public List<String> suggestionList(String query, String contentCountry) throws RegexException, ReCaptchaException, IOException {
+        List<String> suggestions = new ArrayList<>();
+
+        Downloader dl = NewPipe.getDownloader();
+
+        String url = "https://api-v2.soundcloud.com/search/queries"
+                + "?q=" + URLEncoder.encode(query, CHARSET_UTF_8)
+                + "&client_id=" + SoundcloudParsingHelper.clientId()
+                + "&limit=10";
+
+        String response = dl.download(url);
+        JSONObject responseObject = new JSONObject(response);
+        JSONArray responseCollection = responseObject.getJSONArray("collection");
+
+        for (int i = 0; i < responseCollection.length(); i++) {
+            JSONObject suggestion = responseCollection.getJSONObject(i);
+            suggestions.add(suggestion.getString("query"));
+        }
+
+        return suggestions;
+    }
+}