3 files changed, 64 insertions, 0 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java
new file mode 100644
index 0000000..0fe0766
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java
@@ -0,0 +1,6 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+public interface BackupFeedback {
+    String getFeedback();
+    boolean isSuccess();
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java
new file mode 100644
index 0000000..f39fde6
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java
@@ -0,0 +1,28 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+public class IncrementalBackupFeedback implements BackupFeedback {
+    private final boolean success;
+    private final int newFilesAdded;
+
+    public IncrementalBackupFeedback(boolean success, int newFilesAdded) {
+        this.success = success;
+        this.newFilesAdded = newFilesAdded;
+    }
+
+    @Override
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public long getNewFilesAdded() {
+        return newFilesAdded;
+    }
+
+    @Override
+    public String getFeedback() {
+        if (success && newFilesAdded >= 0)
+            return String.format("File(s) added: %d.", newFilesAdded);
+        else
+            return "";
+    }
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java
new file mode 100644
index 0000000..3bcd012
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java
@@ -0,0 +1,30 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+import static com.keuin.kbackupfabric.util.backup.BackupFilesystemUtil.getFriendlyFileSizeString;
+
+public class PrimitiveBackupFeedback implements BackupFeedback {
+    private final boolean success;
+    private final long backupSizeBytes;
+
+    public PrimitiveBackupFeedback(boolean success, long backupSizeBytes) {
+        this.success = success;
+        this.backupSizeBytes = backupSizeBytes;
+    }
+
+    @Override
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public long getBackupSizeBytes() {
+        return backupSizeBytes;
+    }
+
+    @Override
+    public String getFeedback() {
+        if (success && backupSizeBytes >= 0)
+            return String.format("File size: %s.", getFriendlyFileSizeString(backupSizeBytes));
+        else
+            return "";
+    }
+}