Show only containers in recent documents (#209)

* MOPPAND-823

Author: martenrebane

app/src/main/java/ee/ria/DigiDoc/android/signature/list/Result.java

@@ -7,6 +7,7 @@
 
 import java.io.File;
 
+import ee.ria.DigiDoc.android.utils.files.FileSystem;
 import ee.ria.DigiDoc.android.utils.mvi.MviResult;
 
 interface Result extends MviResult<ViewState> {
@@ -38,7 +39,7 @@ static ContainersLoadResult progress(boolean indicateActivity) {
         }
 
         static ContainersLoadResult success(ImmutableList<File> containerFiles) {
-            return create(true, false, containerFiles, null);
+            return create(true, false, FileSystem.filterContainers(containerFiles), null);
         }
 
         static ContainersLoadResult failure(Throwable error) {
@@ -113,7 +114,7 @@ static ContainerRemoveResult progress() {
         }
 
         static ContainerRemoveResult success(ImmutableList<File> containerFiles) {
-            return create(null, false, containerFiles, null);
+            return create(null, false, FileSystem.filterContainers(containerFiles), null);
         }
 
         static ContainerRemoveResult failure(Throwable error) {

app/src/main/java/ee/ria/DigiDoc/android/utils/files/FileSystem.java

@@ -8,7 +8,6 @@
 import com.google.common.io.ByteStreams;
 import com.google.common.io.Files;
 
-import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
 
 import java.io.File;
@@ -20,10 +19,12 @@
 import java.util.Comparator;
 import java.util.List;
 import java.util.Locale;
+import java.util.stream.Collectors;
 
 import javax.inject.Inject;
 
 import ee.ria.DigiDoc.common.FileUtil;
+import ee.ria.DigiDoc.crypto.CryptoContainer;
 import ee.ria.DigiDoc.sign.SignedContainer;
 import timber.log.Timber;
 
@@ -182,6 +183,19 @@ public static boolean isEmptyDataFileInContainer(File containerFile) {
          return false;
     }
 
+    /**
+     * Filter out container files
+     *
+     * @param files List of files.
+     * @return ImmutableList<File> of containers only.
+     */
+    public static ImmutableList<File> filterContainers(ImmutableList<File> files) {
+        return ImmutableList.copyOf(files.stream()
+                .filter(file -> SignedContainer.isContainer(file) ||
+                        CryptoContainer.isCryptoContainer(file))
+                .collect(Collectors.toList()));
+    }
+
     private File cacheDir() {
         return application.getCacheDir();
     }

crypto-lib/src/main/java/ee/ria/DigiDoc/crypto/CryptoContainer.java

@@ -17,12 +17,10 @@
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
-import java.nio.file.FileSystem;
 import java.util.List;
 import java.util.Locale;
 
 import ee.ria.DigiDoc.common.Certificate;
-import ee.ria.DigiDoc.common.FileUtil;
 import okio.ByteString;
 
 import static com.google.common.io.Files.getFileExtension;
@@ -188,4 +186,16 @@ private static CryptoContainer create(File file, ImmutableList<File> dataFiles,
                                           boolean decrypted) {
         return new AutoValue_CryptoContainer(file, dataFiles, recipients, decrypted);
     }
+
+    /**
+     * Check whether this is a crypto container file which should be opened as such
+     * or a regular file which should be added to the container.
+     *
+     * @param file File to check.
+     * @return True if it is a crypto container, false otherwise.
+     */
+    public static boolean isCryptoContainer(File file) {
+        String extension = getFileExtension(file.getName()).toLowerCase();
+        return "cdoc".equals(extension);
+    }
 }