Copy blacklisted files before they are removed

hath-base/src/main/java/hath/base/CacheHandler.java

@@ -23,18 +23,19 @@
 
 package hath.base;
 
-import java.lang.Thread;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 import java.util.Enumeration;
-import java.util.List;
 import java.util.Hashtable;
 
+import hath.base.util.FileTools;
+
 public class CacheHandler {
 	private static final int MEMORY_TABLE_ELEMENTS = 1048576;
 	private Hashtable<String, Long> staticRangeOldest = null;
@@ -650,6 +651,7 @@ public synchronized void processBlacklist(long deltatime) {
 				File file = hvFile.getLocalFileRef();
 
 				if(file.exists()) {
+					copyFileFromCacheDir(hvFile);
 					deleteFileFromCache(hvFile);
 					Out.debug("CacheHandler: Removed blacklisted file " + fileid);
 					++counter;
@@ -803,4 +805,22 @@ public void markRecentlyAccessed(HVFile hvFile, boolean skipMetaUpdate) {
 			}
 		}
 	}
+
+	public void copyFileFromCacheDir(HVFile hvFile) {
+		String blacklistDirectory = "data/blacklist";
+		File copySource = hvFile.getLocalFileRef();
+
+		try {
+			FileTools.checkAndCreateDir(new File(blacklistDirectory));
+
+			String filename = copySource.getName();
+
+			File copyTarget = new File(blacklistDirectory + "/" + filename);
+
+			FileTools.copy(copySource, copyTarget);
+			Out.info("Successfully copied blacklisted file " + filename + " to blacklist directory");
+		} catch (IOException e) {
+			Out.error("Cachehandler: Failed to copy blacklist file " + copySource + " due to error " + e);
+		}
+	}
 }

hath-base/src/test/java/hath/base/CacheHandlerTest.java

@@ -0,0 +1,51 @@
+package hath.base;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+
+public class CacheHandlerTest {
+	private HentaiAtHomeClient client;
+	private CacheHandler cut;
+
+	private Path sourceFile;
+	private HVFile mockHVFile;
+	private Settings settings;
+
+	@BeforeEach
+	public void createCacheHandler() throws Exception {
+		client = mock(HentaiAtHomeClient.class);
+		mockHVFile = mock(HVFile.class);
+		settings = new Settings();
+
+		settings.updateSetting("skip_free_space_check", "true");
+		settings.updateSetting("temp_dir", Files.createTempDirectory("CacheHandlerTestTempDir").toString());
+		settings.initializeDirectories();
+
+		cut = new CacheHandler(client);
+		sourceFile = Files.createTempFile("hath-client-CacheHandlerTest", null);
+	}
+
+	@AfterEach
+	public void tearDown() {
+		cut.terminateCache();
+	}
+
+	@Test
+	public void testCopyFileFromCacheDir() throws Exception {
+		when(mockHVFile.getLocalFileRef()).thenReturn(sourceFile.toFile());
+		cut.copyFileFromCacheDir(mockHVFile);
+
+		assertThat(new File("data/blacklist/" + sourceFile.getFileName().toString()).exists(), is(true));
+	}
+}