[PeerTube] Fix parsing id for instances whose domain ends with a or c

The pattern to detect the channel ID was faulty and e.g. the ID detected for "https://kolektiva.media/video-channels/documentary_channel" was "a/video-channels" which is wrong.  A new pattern is added to distinguish between URLs and potential IDs because IDs must not start with a "/" while IDs inside an URL must.

Fixes TeamNewPipe/NewPipe#11369

extractor/src/main/java/org/schabi/newpipe/extractor/services/peertube/linkHandler/PeertubeChannelLinkHandlerFactory.java

@@ -5,6 +5,7 @@ import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
 import org.schabi.newpipe.extractor.utils.Parser;
 
+import javax.annotation.Nonnull;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.List;
@@ -14,6 +15,7 @@ public final class PeertubeChannelLinkHandlerFactory extends ListLinkHandlerFact
     private static final PeertubeChannelLinkHandlerFactory INSTANCE
             = new PeertubeChannelLinkHandlerFactory();
     private static final String ID_PATTERN = "((accounts|a)|(video-channels|c))/([^/?&#]*)";
+    private static final String ID_URL_PATTERN = "/((accounts|a)|(video-channels|c))/([^/?&#]*)";
     public static final String API_ENDPOINT = "/api/v1/";
 
     private PeertubeChannelLinkHandlerFactory() {
@@ -25,7 +27,7 @@ public final class PeertubeChannelLinkHandlerFactory extends ListLinkHandlerFact
 
     @Override
     public String getId(final String url) throws ParsingException, UnsupportedOperationException {
-        return fixId(Parser.matchGroup(ID_PATTERN, url, 0));
+        return fixId(Parser.matchGroup(ID_URL_PATTERN, url, 0));
     }
 
     @Override
@@ -74,12 +76,13 @@ public final class PeertubeChannelLinkHandlerFactory extends ListLinkHandlerFact
      * @param id the id to fix
      * @return the fixed id
      */
-    private String fixId(final String id) {
+    private String fixId(@Nonnull final String id) {
-        if (id.startsWith("a/")) {
+        final String cleanedId = id.startsWith("/") ? id.substring(1) : id;
-            return "accounts" + id.substring(1);
+        if (cleanedId.startsWith("a/")) {
-        } else if (id.startsWith("c/")) {
+            return "accounts" + cleanedId.substring(1);
-            return "video-channels" + id.substring(1);
+        } else if (cleanedId.startsWith("c/")) {
+            return "video-channels" + cleanedId.substring(1);
         }
-        return id;
+        return cleanedId;
     }
 }

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

@@ -234,4 +234,111 @@ public class PeertubeChannelExtractorTest {
             assertTrue(extractor.getTags().isEmpty());
         }
     }
+
+    public static class DocumentaryChannel implements BaseChannelExtractorTest {
+        // https://github.com/TeamNewPipe/NewPipe/issues/11369
+
+        private static PeertubeChannelExtractor extractor;
+
+        @BeforeAll
+        public static void setUp() throws Exception {
+            NewPipe.init(DownloaderTestImpl.getInstance());
+            // setting instance might break test when running in parallel
+            PeerTube.setInstance(new PeertubeInstance("https://kolektiva.media", "kolektiva.media"));
+            extractor = (PeertubeChannelExtractor) PeerTube
+                    .getChannelExtractor("https://kolektiva.media/video-channels/documentary_channel");
+            extractor.fetchPage();
+        }
+
+        /*//////////////////////////////////////////////////////////////////////////
+        // Extractor
+        //////////////////////////////////////////////////////////////////////////*/
+
+        @Test
+        public void testServiceId() {
+            assertEquals(PeerTube.getServiceId(), extractor.getServiceId());
+        }
+
+        @Test
+        public void testName() throws ParsingException {
+            assertEquals("Documentary Channel", extractor.getName());
+        }
+
+        @Test
+        public void testId() throws ParsingException {
+            assertEquals("video-channels/documentary_channel", extractor.getId());
+        }
+
+        @Test
+        public void testUrl() throws ParsingException {
+            assertEquals("https://kolektiva.media/video-channels/documentary_channel", extractor.getUrl());
+        }
+
+        @Test
+        public void testOriginalUrl() throws ParsingException {
+            assertEquals("https://kolektiva.media/video-channels/documentary_channel", extractor.getOriginalUrl());
+        }
+
+        /*//////////////////////////////////////////////////////////////////////////
+        // ChannelExtractor
+        //////////////////////////////////////////////////////////////////////////*/
+
+        @Test
+        public void testDescription() {
+            assertNotNull(extractor.getDescription());
+        }
+
+        @Test
+        void testParentChannelName() throws ParsingException {
+            assertEquals("consumedmind", extractor.getParentChannelName());
+        }
+
+        @Test
+        void testParentChannelUrl() throws ParsingException {
+            assertEquals("https://kolektiva.media/accounts/consumedmind", extractor.getParentChannelUrl());
+        }
+
+        @Test
+        void testParentChannelAvatars() {
+            defaultTestImageCollection(extractor.getParentChannelAvatars());
+        }
+
+        @Test
+        public void testAvatars() {
+            defaultTestImageCollection(extractor.getAvatars());
+        }
+
+        @Test
+        public void testBanners() throws ParsingException {
+            assertGreaterOrEqual(1, extractor.getBanners().size());
+        }
+
+        @Test
+        public void testFeedUrl() throws ParsingException {
+            assertEquals("https://kolektiva.media/feeds/videos.xml?videoChannelId=2994", extractor.getFeedUrl());
+        }
+
+        @Test
+        public void testSubscriberCount() {
+            assertGreaterOrEqual(25, extractor.getSubscriberCount());
+        }
+
+        @Test
+        @Override
+        public void testVerified() throws Exception {
+            assertFalse(extractor.isVerified());
+        }
+
+        @Test
+        @Override
+        public void testTabs() throws Exception {
+            assertTabsContain(extractor.getTabs(), ChannelTabs.VIDEOS, ChannelTabs.PLAYLISTS);
+        }
+
+        @Test
+        @Override
+        public void testTags() throws Exception {
+            assertTrue(extractor.getTags().isEmpty());
+        }
+    }
 }

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

@@ -33,6 +33,7 @@ public class PeertubeChannelLinkHandlerFactoryTest {
         assertTrue(linkHandler.acceptUrl("https://peertube.stream/video-channels/kranti_channel@videos.squat.net/videos"));
         assertTrue(linkHandler.acceptUrl("https://peertube.stream/c/kranti_channel@videos.squat.net/videos"));
         assertTrue(linkHandler.acceptUrl("https://peertube.stream/api/v1/video-channels/7682d9f2-07be-4622-862e-93ec812e2ffa"));
+        assertTrue(linkHandler.acceptUrl("https://kolektiva.media/video-channels/documentary_channel"));
 
         assertDoNotAcceptNonURLs(linkHandler);
     }
@@ -60,6 +61,16 @@ public class PeertubeChannelLinkHandlerFactoryTest {
                 linkHandler.fromUrl("https://peertube.stream/c/kranti_channel@videos.squat.net/video-playlists").getId());
         assertEquals("video-channels/kranti_channel@videos.squat.net",
                 linkHandler.fromUrl("https://peertube.stream/api/v1/video-channels/kranti_channel@videos.squat.net").getId());
+
+        // instance URL ending with an "a": https://kolektiva.media
+        assertEquals("video-channels/documentary_channel",
+                linkHandler.fromUrl("https://kolektiva.media/video-channels/documentary_channel/videos").getId());
+        assertEquals("video-channels/documentary_channel",
+                linkHandler.fromUrl("https://kolektiva.media/c/documentary_channel/videos").getId());
+        assertEquals("video-channels/documentary_channel",
+                linkHandler.fromUrl("https://kolektiva.media/c/documentary_channel/video-playlists").getId());
+        assertEquals("video-channels/documentary_channel",
+                linkHandler.fromUrl("https://kolektiva.media/api/v1/video-channels/documentary_channel").getId());
     }
 
     @Test