3 files changed, 42 insertions, 1 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/util/backup/name/BackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/util/backup/name/BackupFileNameEncoder.java
index 83967b7..972403b 100644
--- a/src/main/java/com/keuin/kbackupfabric/util/backup/name/BackupFileNameEncoder.java
+++ b/src/main/java/com/keuin/kbackupfabric/util/backup/name/BackupFileNameEncoder.java
@@ -1,6 +1,7 @@
 package com.keuin.kbackupfabric.util.backup.name;
 
 import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 
 /**
  * Encode and decode backup file name for a specific backup type.
@@ -38,12 +39,20 @@ public interface BackupFileNameEncoder {
     }
 
     class BackupBasicInformation {
+
         public final String customName;
         public final LocalDateTime time;
 
+        private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm.ss");
+
         BackupBasicInformation(String customName, LocalDateTime time) {
             this.customName = customName;
             this.time = time;
         }
+
+        @Override
+        public String toString() {
+            return String.format("%s, %s", customName, time.format(formatter));
+        }
     }
 }
diff --git a/src/main/java/com/keuin/kbackupfabric/util/backup/name/IncrementalBackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/util/backup/name/IncrementalBackupFileNameEncoder.java
new file mode 100644
index 0000000..ae54930
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/util/backup/name/IncrementalBackupFileNameEncoder.java
@@ -0,0 +1,33 @@
+package com.keuin.kbackupfabric.util.backup.name;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class IncrementalBackupFileNameEncoder implements BackupFileNameEncoder {
+    private static final String backupFileNamePrefix = "incremental-";
+    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
+
+    @Override
+    public String encode(String customName, LocalDateTime time) {
+        if (!isValidCustomName(customName))
+            throw new IllegalArgumentException("Invalid custom name");
+        String timeString = time.format(formatter);
+        return backupFileNamePrefix + "-" + timeString + "_" + customName + ".kbi";
+    }
+
+    @Override
+    public BackupFileNameEncoder.BackupBasicInformation decode(String fileName) {
+        Pattern pattern = Pattern.compile(
+                backupFileNamePrefix + "-" + "([0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}-[0-9]{2}-[0-9]{2})_(.+)\\.kbi"
+        );
+        Matcher matcher = pattern.matcher(fileName);
+        if (matcher.find()) {
+            String timeString = matcher.group(1);
+            String customName = matcher.group(2);
+            return new BackupFileNameEncoder.BackupBasicInformation(customName, LocalDateTime.parse(timeString, formatter));
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/util/backup/name/PrimitiveBackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/util/backup/name/PrimitiveBackupFileNameEncoder.java
index 39c2403..bcba114 100644
--- a/src/main/java/com/keuin/kbackupfabric/util/backup/name/PrimitiveBackupFileNameEncoder.java
+++ b/src/main/java/com/keuin/kbackupfabric/util/backup/name/PrimitiveBackupFileNameEncoder.java
@@ -6,7 +6,6 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class PrimitiveBackupFileNameEncoder implements BackupFileNameEncoder {
-
     private static final String backupFileNamePrefix = "kbackup";
     private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");