add extraction for support info and rename getLanguageInfo function

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/MediaCCCStreamExtractor.java

@@ -248,7 +248,7 @@ public class MediaCCCStreamExtractor extends StreamExtractor {
     }
 
     @Override
-    public String getStreamInfoLanguage() throws ParsingException {
+    public String getLanguageInfo() throws ParsingException {
         return "";
     }
 
@@ -257,4 +257,10 @@ public class MediaCCCStreamExtractor extends StreamExtractor {
     public List<String> getTags() throws ParsingException {
         return new ArrayList<>();
     }
+
+    @Nonnull
+    @Override
+    public String getSupportInfo() throws ParsingException {
+        return "";
+    }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/peertube/extractors/PeertubeStreamExtractor.java

@@ -35,6 +35,8 @@ import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
 import com.grack.nanojson.JsonParserException;
 
+import javax.annotation.Nonnull;
+
 public class PeertubeStreamExtractor extends StreamExtractor {
 
     
@@ -251,6 +253,12 @@ public class PeertubeStreamExtractor extends StreamExtractor {
         }
     }
 
+    @Nonnull
+    @Override
+    public String getSupportInfo() throws ParsingException {
+        return JsonUtils.getString(json, "support");
+    }
+
     private String getRelatedStreamsUrl(List<String> tags) throws UnsupportedEncodingException {
         String url = baseUrl + PeertubeSearchQueryHandlerFactory.SEARCH_ENDPOINT;
         StringBuilder params = new StringBuilder();
@@ -378,7 +386,7 @@ public class PeertubeStreamExtractor extends StreamExtractor {
     }
 
     @Override
-    public String getStreamInfoLanguage() throws ParsingException {
+    public String getLanguageInfo() throws ParsingException {
         return JsonUtils.getString(json, "language.label");
     }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractor.java

@@ -276,7 +276,7 @@ public class SoundcloudStreamExtractor extends StreamExtractor {
     }
 
     @Override
-    public String getStreamInfoLanguage() throws ParsingException {
+    public String getLanguageInfo() throws ParsingException {
         return "";
     }
 
@@ -285,4 +285,10 @@ public class SoundcloudStreamExtractor extends StreamExtractor {
     public List<String> getTags() throws ParsingException {
         return new ArrayList<>();
     }
+
+    @Nonnull
+    @Override
+    public String getSupportInfo() throws ParsingException {
+        return "";
+    }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java

@@ -1156,7 +1156,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     }
 
     @Override
-    public String getStreamInfoLanguage() throws ParsingException {
+    public String getLanguageInfo() throws ParsingException {
         return "";
     }
 
@@ -1165,4 +1165,10 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     public List<String> getTags() throws ParsingException {
         return new ArrayList<>();
     }
+
+    @Nonnull
+    @Override
+    public String getSupportInfo() throws ParsingException {
+        return "";
+    }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamExtractor.java

@@ -396,7 +396,7 @@ public abstract class StreamExtractor extends Extractor {
      * @throws ParsingException
      */
     @Nonnull
-    public abstract String getStreamInfoLanguage() throws ParsingException;
+    public abstract String getLanguageInfo() throws ParsingException;
 
     /**
      * The list of tags of the stream.
@@ -406,4 +406,16 @@ public abstract class StreamExtractor extends Extractor {
      */
     @Nonnull
     public abstract List<String> getTags() throws ParsingException;
+
+    /**
+     * The support information of the stream.
+     * see: https://framatube.org/videos/watch/ee408ec8-07cd-4e35-b884-fb681a4b9d37
+     * (support button).
+     * If the support information are not available,
+     * you can simply return an empty String.
+     * @return the support information of the stream or an empty String.
+     * @throws ParsingException
+     */
+    @Nonnull
+    public abstract String getSupportInfo() throws ParsingException;
 }

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamInfo.java

@@ -292,7 +292,7 @@ public class StreamInfo extends Info {
             streamInfo.addError(e);
         }
         try {
-            streamInfo.setLanguage(extractor.getStreamInfoLanguage());
+            streamInfo.setLanguageInfo(extractor.getLanguageInfo());
         } catch (Exception e) {
             streamInfo.addError(e);
         }
@@ -301,6 +301,11 @@ public class StreamInfo extends Info {
         } catch (Exception e) {
             streamInfo.addError(e);
         }
+        try {
+            streamInfo.setSupportInfo(extractor.getSupportInfo());
+        } catch (Exception e) {
+            streamInfo.addError(e);
+        }
 
         streamInfo.setRelatedStreams(ExtractorHelper.getRelatedVideosOrLogError(streamInfo, extractor));
 
@@ -345,6 +350,7 @@ public class StreamInfo extends Info {
     private String category = "";
     private String licence = "";
     private String language = "";
+    private String support = "";
     private List<String> tags = new ArrayList<>();
 
     /**
@@ -604,11 +610,11 @@ public class StreamInfo extends Info {
         this.licence = str;
     }
 
-    public String getLanguage() {
+    public String getLanguageInfo() {
         return this.language;
     }
 
-    public void setLanguage(String lang) {
+    public void setLanguageInfo(String lang) {
         this.language = lang;
     }
 
@@ -620,5 +626,11 @@ public class StreamInfo extends Info {
         this.tags = tags;
     }
 
+    public void setSupportInfo(String support) {
+        this.support = support;
+    }
 
+    public String getSupportInfo() {
+        return this.support;
+    }
 }

extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorDefaultTest.java

@@ -147,4 +147,11 @@ public class PeertubeStreamExtractorDefaultTest {
         ageLimit.fetchPage();
         assertEquals(18, ageLimit.getAgeLimit());
     }
+
+    @Test
+    public void testGetSupportInformation() throws ExtractionException, IOException {
+        PeertubeStreamExtractor supportInfoExtractor = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://framatube.org/videos/watch/ee408ec8-07cd-4e35-b884-fb681a4b9d37");
+        supportInfoExtractor.fetchPage();
+        assertEquals("https://utip.io/chatsceptique", supportInfoExtractor.getSupportInfo());
+    }
 }