Add specialized HLS server download for LiveJasmin

The server-side HLS download has to refresh the master playlist URL like
the merged HLS donwload

common/src/main/java/ctbrec/sites/jasmin/LiveJasminHlsDownload.java

@@ -0,0 +1,48 @@
+package ctbrec.sites.jasmin;
+
+import java.io.IOException;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.iheartradio.m3u8.ParseException;
+import com.iheartradio.m3u8.PlaylistException;
+
+import ctbrec.io.HttpClient;
+import ctbrec.recorder.download.HlsDownload;
+
+public class LiveJasminHlsDownload extends HlsDownload {
+
+    private static final transient Logger LOG = LoggerFactory.getLogger(LiveJasminHlsDownload.class);
+    private long lastMasterPlaylistUpdate = 0;
+    private String segmentUrl;
+
+    public LiveJasminHlsDownload(HttpClient client) {
+        super(client);
+    }
+
+    @Override
+    protected SegmentPlaylist getNextSegments(String segments) throws IOException, ParseException, PlaylistException {
+        if(this.segmentUrl == null) {
+            this.segmentUrl = segments;
+        }
+        SegmentPlaylist playlist = super.getNextSegments(segmentUrl);
+        long now = System.currentTimeMillis();
+        if( (now - lastMasterPlaylistUpdate) > TimeUnit.SECONDS.toMillis(60)) {
+            super.downloadThreadPool.submit(this::updatePlaylistUrl);
+            lastMasterPlaylistUpdate = now;
+        }
+        return playlist;
+    }
+
+    private void updatePlaylistUrl() {
+        try {
+            LOG.debug("Updating segment playlist URL for {}", getModel());
+            segmentUrl = getSegmentPlaylistUrl(getModel());
+        } catch (IOException | ExecutionException | ParseException | PlaylistException e) {
+            LOG.error("Couldn't update segment playlist url. This might cause a premature download termination", e);
+        }
+    }
+}