Add bandcamp search suggestion extractor

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/BandcampService.java

@@ -10,10 +10,7 @@ import org.schabi.newpipe.extractor.kiosk.KioskList;
 import org.schabi.newpipe.extractor.linkhandler.*;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
-import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampChannelExtractor;
+import org.schabi.newpipe.extractor.services.bandcamp.extractors.*;
-import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampPlaylistExtractor;
-import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampSearchExtractor;
-import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampStreamExtractor;
 import org.schabi.newpipe.extractor.services.bandcamp.linkHandler.BandcampChannelLinkHandlerFactory;
 import org.schabi.newpipe.extractor.services.bandcamp.linkHandler.BandcampPlaylistLinkHandlerFactory;
 import org.schabi.newpipe.extractor.services.bandcamp.linkHandler.BandcampSearchQueryHandlerFactory;
@@ -69,7 +66,7 @@ public class BandcampService extends StreamingService {
 
     @Override
     public SuggestionExtractor getSuggestionExtractor() {
-        return null;
+        return new BandcampSuggestionExtractor(this);
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampSuggestionExtractor.java

@@ -0,0 +1,51 @@
+// Created by Fynn Godau 2019, licensed GNU GPL version 3 or later
+
+package org.schabi.newpipe.extractor.services.bandcamp.extractors;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.downloader.Downloader;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.suggestion.SuggestionExtractor;
+
+import java.io.IOException;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.schabi.newpipe.extractor.services.bandcamp.linkHandler.BandcampSearchQueryHandlerFactory.CHARSET_UTF_8;
+
+public class BandcampSuggestionExtractor extends SuggestionExtractor {
+
+    private static final String AUTOCOMPLETE_URL = "https://bandcamp.com/api/fuzzysearch/1/autocomplete?q=";
+    public BandcampSuggestionExtractor(StreamingService service) {
+        super(service);
+    }
+
+    @Override
+    public List<String> suggestionList(String query) throws IOException, ExtractionException {
+        Downloader downloader = NewPipe.getDownloader();
+
+        JSONObject fuzzyResults = new JSONObject(
+                downloader.get(AUTOCOMPLETE_URL + URLEncoder.encode(query, CHARSET_UTF_8)).responseBody()
+        );
+
+        JSONArray jsonArray = fuzzyResults.getJSONObject("auto")
+                .getJSONArray("results");
+
+        ArrayList<String> suggestions = new ArrayList<>();
+
+        for (int i = 0; i < jsonArray.length(); i++) {
+            JSONObject fuzzyResult = jsonArray.getJSONObject(i);
+            String res = fuzzyResult.getString("name");
+
+            if (!suggestions.contains(res)) suggestions.add(res);
+        }
+
+
+
+        return suggestions;
+    }
+}

extractor/src/test/java/org/schabi/newpipe/extractor/services/bandcamp/BandcampSuggestionExtractorTest.java

@@ -0,0 +1,41 @@
+// Created by Fynn Godau 2019, licensed GNU GPL version 3 or later
+
+package org.schabi.newpipe.extractor.services.bandcamp;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.schabi.newpipe.DownloaderTestImpl;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampSuggestionExtractor;
+
+import java.io.IOException;
+import java.util.List;
+
+import static org.junit.Assert.assertTrue;
+import static org.schabi.newpipe.extractor.ServiceList.bandcamp;
+
+/**
+ * Tests for {@link BandcampSuggestionExtractor}
+ */
+public class BandcampSuggestionExtractorTest {
+
+    private static BandcampSuggestionExtractor extractor;
+
+    @BeforeClass
+    public static void setUp() {
+        NewPipe.init(DownloaderTestImpl.getInstance());
+        extractor = (BandcampSuggestionExtractor) bandcamp.getSuggestionExtractor();
+    }
+
+    @Test
+    public void testSearchExample() throws IOException, ExtractionException {
+        List<String> c418 = extractor.suggestionList("c418");
+
+        // When looking for c418, one should find C418
+        assertTrue(c418.contains("C418"));
+
+        // There should be five results, but we can't be sure of that forever
+        assertTrue(c418.size() > 2);
+    }
+}