Code refactor: eliminate unnecessary instance creation of IncrementalBackupFileNameEncoder

9 files changed, 78 insertions, 52 deletions

diff --git a/src/main/java/com/keuin/kbackupfabric/KBCommands.java b/src/main/java/com/keuin/kbackupfabric/KBCommands.java
index 73b61df..d9213c3 100644
--- a/src/main/java/com/keuin/kbackupfabric/KBCommands.java
+++ b/src/main/java/com/keuin/kbackupfabric/KBCommands.java
@@ -1,6 +1,8 @@
 package com.keuin.kbackupfabric;
 
 import com.keuin.kbackupfabric.backup.BackupFilesystemUtil;
+import com.keuin.kbackupfabric.backup.incremental.serializer.IncBackupInfoSerializer;
+import com.keuin.kbackupfabric.backup.incremental.serializer.SavedIncrementalBackup;
 import com.keuin.kbackupfabric.backup.name.IncrementalBackupFileNameEncoder;
 import com.keuin.kbackupfabric.backup.name.PrimitiveBackupFileNameEncoder;
 import com.keuin.kbackupfabric.backup.suggestion.BackupNameSuggestionProvider;
@@ -12,6 +14,7 @@ import com.keuin.kbackupfabric.operation.abstracts.i.Invokable;
 import com.keuin.kbackupfabric.operation.backup.method.ConfiguredBackupMethod;
 import com.keuin.kbackupfabric.operation.backup.method.ConfiguredIncrementalBackupMethod;
 import com.keuin.kbackupfabric.operation.backup.method.ConfiguredPrimitiveBackupMethod;
+import com.keuin.kbackupfabric.util.DateUtil;
 import com.keuin.kbackupfabric.util.PrintUtil;
 import com.mojang.brigadier.arguments.StringArgumentType;
 import com.mojang.brigadier.context.CommandContext;
@@ -93,16 +96,13 @@ public final class KBCommands {
                                 || name.toLowerCase().endsWith(".kbi"))
         );
 
-        Function<File, String> backupInformationProvider = new Function<File, String>() {
-            @Override
-            public String apply(File file) {
-                Objects.requireNonNull(file);
-                if (file.getName().toLowerCase().endsWith(".zip"))
-                    return getPrimitiveBackupInformationString(file.getName(), file.length());
-                else if (file.getName().toLowerCase().endsWith(".kbi"))
-                    return getIncrementalBackupInformationString(file.getName());
-                return file.getName();
-            }
+        Function<File, String> backupInformationProvider = file -> {
+            Objects.requireNonNull(file);
+            if (file.getName().toLowerCase().endsWith(".zip"))
+                return getPrimitiveBackupInformationString(file.getName(), file.length());
+            else if (file.getName().toLowerCase().endsWith(".kbi"))
+                return getIncrementalBackupInformationString(file);
+            return file.getName();
         };
 
         synchronized (backupFileNameList) {
@@ -290,7 +290,7 @@ public final class KBCommands {
                     getLevelPath(server),
                     getBackupSaveDirectory(server).getCanonicalPath()
             ) : new ConfiguredIncrementalBackupMethod(
-                    new IncrementalBackupFileNameEncoder().encode(customBackupName, LocalDateTime.now()),
+                    IncrementalBackupFileNameEncoder.INSTANCE.encode(customBackupName, LocalDateTime.now()),
                     getLevelPath(server),
                     getBackupSaveDirectory(server).getCanonicalPath(),
                     getIncrementalBackupBaseDirectory(server).getCanonicalPath()
@@ -393,17 +393,22 @@ public final class KBCommands {
 
     private static String getPrimitiveBackupInformationString(String backupFileName, long backupFileSizeBytes) {
         return String.format(
-                "%s , size: %s",
+                "(ZIP) %s , size: %s",
                 new PrimitiveBackupFileNameEncoder().decode(backupFileName),
                 getFriendlyFileSizeString(backupFileSizeBytes)
         );
     }
 
-    private static String getIncrementalBackupInformationString(String backupFileName) {
-        return String.format(
-                "(Incremental) %s",
-                new IncrementalBackupFileNameEncoder().decode(backupFileName)
-        );
+    private static String getIncrementalBackupInformationString(File backupFile) {
+        try {
+            SavedIncrementalBackup info = IncBackupInfoSerializer.fromFile(backupFile);
+            return "(Incremental) " + info.getBackupName()
+                    + ", " + DateUtil.getString(info.getBackupTime())
+                    + ((info.getTotalSizeBytes() > 0) ?
+                    ("size: " + BackupFilesystemUtil.getFriendlyFileSizeString(info.getTotalSizeBytes())) : "");
+        } catch (IOException e) {
+            return "(Incremental) " + backupFile.getName();
+        }
     }
 
 //    /**
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/BackupNameTimeFormatter.java b/src/main/java/com/keuin/kbackupfabric/backup/BackupNameTimeFormatter.java
index bcf5d18..39abc75 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/BackupNameTimeFormatter.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/BackupNameTimeFormatter.java
@@ -1,32 +1,23 @@
 package com.keuin.kbackupfabric.backup;
 
+import com.keuin.kbackupfabric.util.DateUtil;
+
 import java.time.LocalDateTime;
-import java.time.ZoneId;
-import java.time.ZoneOffset;
-import java.time.format.DateTimeFormatter;
 
 public class BackupNameTimeFormatter {
-    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
 
     @Deprecated
     public static String getTimeString() {
-        return LocalDateTime.now().format(formatter);
+        return DateUtil.getString(LocalDateTime.now());
     }
 
     public static String localDateTimeToString(LocalDateTime localDateTime) {
-        return localDateTime.format(formatter);
+        return DateUtil.getString(localDateTime);
     }
 
     @Deprecated
     public static long timeStringToEpochSeconds(String timeString) {
-        ZoneId systemZone = ZoneId.systemDefault(); // my timezone
-        LocalDateTime localDateTime = LocalDateTime.parse(timeString, formatter);
-        ZoneOffset currentOffsetForMyZone = systemZone.getRules().getOffset(localDateTime);
-        return localDateTime.toEpochSecond(currentOffsetForMyZone);
-    }
-
-    public static LocalDateTime timeStringToLocalDateTime(String timeString) {
-        return LocalDateTime.parse(timeString,formatter);
+        return DateUtil.toEpochSecond(timeString);
     }
 
 }
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBackupInfoSerializer.java b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBackupInfoSerializer.java
index 45590ba..d084aef 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBackupInfoSerializer.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBackupInfoSerializer.java
@@ -26,13 +26,13 @@ public class IncBackupInfoSerializer {
                     return (SavedIncrementalBackup) o;
                 } else if (o instanceof ObjectCollection) {
                     // backward compatibility with old-style (v0) incremental backup
-                    BackupFileNameEncoder.BackupBasicInformation info = new IncrementalBackupFileNameEncoder().decode(file.getName());
+                    BackupFileNameEncoder.BackupBasicInformation info = IncrementalBackupFileNameEncoder.INSTANCE.decode(file.getName());
                     if (info == null)
                         throw new IOException("Invalid backup file name.");
                     return new SavedIncBackupV0(ObjectCollectionConverter.convert((ObjectCollection) o), info);
                 } else if (o instanceof ObjectCollection2) {
                     // compatible with 1.4.6 implementation
-                    BackupFileNameEncoder.BackupBasicInformation info = new IncrementalBackupFileNameEncoder().decode(file.getName());
+                    BackupFileNameEncoder.BackupBasicInformation info = IncrementalBackupFileNameEncoder.INSTANCE.decode(file.getName());
                     if (info == null)
                         throw new IOException("Invalid backup file name.");
                     return new SavedIncBackupV0((ObjectCollection2) o, info);
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncBackupV1.java b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncBackupV1.java
index 0ebe06a..bd2d4eb 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncBackupV1.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncBackupV1.java
@@ -2,10 +2,10 @@ package com.keuin.kbackupfabric.backup.incremental.serializer;
 
 import com.keuin.kbackupfabric.backup.BackupFilesystemUtil;
 import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
+import com.keuin.kbackupfabric.util.DateUtil;
 
 import java.io.Serializable;
 import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
 import java.util.Objects;
 
 public class SavedIncBackupV1 implements SavedIncrementalBackup, Serializable {
@@ -17,7 +17,6 @@ public class SavedIncBackupV1 implements SavedIncrementalBackup, Serializable {
     private final long increasedSizeBytes;
     private final int filesAdded;
     private final int totalFiles;
-    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
 
     public SavedIncBackupV1(ObjectCollection2 objectCollection2, String backupName, ZonedDateTime backupTime, long totalSizeBytes, long increasedSizeBytes, int filesAdded, int totalFiles) {
         this.totalFiles = totalFiles;
@@ -90,7 +89,7 @@ public class SavedIncBackupV1 implements SavedIncrementalBackup, Serializable {
         return String.format(
                 "%s, created at %s, files: %d (total size: %s), copied size: %s, files added: %d",
                 backupName,
-                backupTime.format(formatter),
+                DateUtil.getString(backupTime),
                 totalFiles,
                 BackupFilesystemUtil.getFriendlyFileSizeString(totalSizeBytes),
                 BackupFilesystemUtil.getFriendlyFileSizeString(increasedSizeBytes),
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/name/BackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/backup/name/BackupFileNameEncoder.java
index 8ad91f7..b471834 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/name/BackupFileNameEncoder.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/name/BackupFileNameEncoder.java
@@ -1,7 +1,8 @@
 package com.keuin.kbackupfabric.backup.name;
 
+import com.keuin.kbackupfabric.util.DateUtil;
+
 import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
 
 /**
  * Encode and decode backup file name for a specific backup type.
@@ -49,8 +50,6 @@ public interface BackupFileNameEncoder {
         public final String customName;
         public final LocalDateTime time;
 
-        private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm.ss");
-
         protected BackupBasicInformation(String customName, LocalDateTime time) {
             this.customName = customName;
             this.time = time;
@@ -58,7 +57,7 @@ public interface BackupFileNameEncoder {
 
         @Override
         public String toString() {
-            return String.format("%s, %s", customName, time.format(formatter));
+            return String.format("%s, %s", customName, DateUtil.getString(time));
         }
     }
 }
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/name/IncrementalBackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/backup/name/IncrementalBackupFileNameEncoder.java
index 77e19b9..45cd00e 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/name/IncrementalBackupFileNameEncoder.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/name/IncrementalBackupFileNameEncoder.java
@@ -1,24 +1,24 @@
 package com.keuin.kbackupfabric.backup.name;
 
+import com.keuin.kbackupfabric.util.DateUtil;
+
 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";
-    // TODO: Merge all date formatter like this, into one single instance
-    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
+    public static final IncrementalBackupFileNameEncoder INSTANCE = new IncrementalBackupFileNameEncoder();
 
-    // TODO: make this private and use singleton pattern
-    public IncrementalBackupFileNameEncoder() {
+    private IncrementalBackupFileNameEncoder() {
     }
 
     @Override
     public String encode(String customName, LocalDateTime time) {
         if (!isValidCustomName(customName))
             throw new IllegalArgumentException("Invalid custom name");
-        String timeString = time.format(formatter);
+        String timeString = DateUtil.getString(time);
         return backupFileNamePrefix + "-" + timeString + "_" + customName + ".kbi";
     }
 
@@ -31,8 +31,9 @@ public class IncrementalBackupFileNameEncoder implements BackupFileNameEncoder {
         if (matcher.find()) {
             String timeString = matcher.group(1);
             String customName = matcher.group(2);
-            return new BackupFileNameEncoder.BackupBasicInformation(customName, LocalDateTime.parse(timeString, formatter));
+            return new BackupFileNameEncoder.BackupBasicInformation(customName, DateUtil.toLocalDateTime(timeString));
         }
         return null;
     }
+
 }
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/name/PrimitiveBackupFileNameEncoder.java b/src/main/java/com/keuin/kbackupfabric/backup/name/PrimitiveBackupFileNameEncoder.java
index c8e73f9..1deec8f 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/name/PrimitiveBackupFileNameEncoder.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/name/PrimitiveBackupFileNameEncoder.java
@@ -1,19 +1,19 @@
 package com.keuin.kbackupfabric.backup.name;
 
+import com.keuin.kbackupfabric.util.DateUtil;
+
 import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
 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");
 
     @Override
     public String encode(String customName, LocalDateTime time) {
         if (!isValidCustomName(customName))
             throw new IllegalArgumentException("Invalid custom name");
-        String timeString = time.format(formatter);
+        String timeString = DateUtil.getString(time);
         return backupFileNamePrefix + "-" + timeString + "_" + customName + ".zip";
     }
 
@@ -26,7 +26,7 @@ public class PrimitiveBackupFileNameEncoder implements BackupFileNameEncoder {
         if (matcher.find()) {
             String timeString = matcher.group(1);
             String customName = matcher.group(2);
-            return new BackupBasicInformation(customName, LocalDateTime.parse(timeString, formatter));
+            return new BackupBasicInformation(customName, DateUtil.toLocalDateTime(timeString));
         }
         return null;
     }
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
index c4be40d..2a9cbc8 100644
--- a/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
@@ -74,7 +74,7 @@ public class ConfiguredIncrementalBackupMethod implements ConfiguredBackupMethod
 
             // newer saved info (with metadata)
             File indexFile = new File(backupIndexFileSaveDirectory, backupIndexFileName);
-            BackupFileNameEncoder.BackupBasicInformation info = new IncrementalBackupFileNameEncoder().decode(backupIndexFileName);
+            BackupFileNameEncoder.BackupBasicInformation info = IncrementalBackupFileNameEncoder.INSTANCE.decode(backupIndexFileName);
             IncBackupInfoSerializer.toFile(indexFile, SavedIncrementalBackup.newLatest(
                     collection,
                     info.customName,
diff --git a/src/main/java/com/keuin/kbackupfabric/util/DateUtil.java b/src/main/java/com/keuin/kbackupfabric/util/DateUtil.java
new file mode 100644
index 0000000..b101cfd
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/util/DateUtil.java
@@ -0,0 +1,31 @@
+package com.keuin.kbackupfabric.util;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class DateUtil {
+    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
+
+    public static String getString(LocalDateTime localDateTime) {
+        return localDateTime.format(formatter);
+    }
+
+    public static String getString(ZonedDateTime zonedDateTime) {
+        return zonedDateTime.withZoneSameInstant(ZoneId.systemDefault()).toLocalDateTime().format(formatter);
+    }
+
+    @Deprecated
+    public static long toEpochSecond(String dateTimeString) {
+        ZoneId systemZone = ZoneId.systemDefault(); // my timezone
+        LocalDateTime localDateTime = LocalDateTime.parse(dateTimeString, formatter);
+        ZoneOffset currentOffsetForMyZone = systemZone.getRules().getOffset(localDateTime);
+        return localDateTime.toEpochSecond(currentOffsetForMyZone);
+    }
+
+    public static LocalDateTime toLocalDateTime(String timeString) {
+        return LocalDateTime.parse(timeString, formatter);
+    }
+}