Added 'latest' keyword to restore (#85)

RestoreHelper::getAvailableBackups now returns sorted LinkedList

src/main/java/net/szum123321/textile_backup/commands/FileSuggestionProvider.java

@@ -62,6 +62,12 @@ public final class FileSuggestionProvider implements SuggestionProvider<ServerCo
             }
         }
 
+        if("latest".startsWith(remaining) && !files.isEmpty()) //suggest latest
+            builder.suggest("latest", new LiteralMessage (
+                    files.getLast().getCreationTime().format(Globals.defaultDateTimeFormatter) +
+                            (files.getLast().getComment().map(s -> "#" + s).orElse("")))
+            );
+
         return builder.buildFuture();
     }
 }

src/main/java/net/szum123321/textile_backup/commands/manage/ListBackupsCommand.java

@@ -34,7 +34,7 @@ public class ListBackupsCommand {
     public static LiteralArgumentBuilder<ServerCommandSource> register() {
         return CommandManager.literal("list")
                 .executes(ctx -> { StringBuilder builder = new StringBuilder();
-                    List<RestoreableFile> backups = RestoreHelper.getAvailableBackups(ctx.getSource().getServer());
+                    var backups = RestoreHelper.getAvailableBackups(ctx.getSource().getServer());
 
                     if(backups.size() == 0) {
                         builder.append("There a no backups available for this world.");

src/main/java/net/szum123321/textile_backup/commands/restore/RestoreBackupCommand.java

@@ -36,6 +36,7 @@ import net.szum123321.textile_backup.core.restore.RestoreHelper;
 import javax.annotation.Nullable;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeParseException;
+import java.util.Objects;
 import java.util.Optional;
 
 public class RestoreBackupCommand {
@@ -65,6 +66,7 @@ public class RestoreBackupCommand {
                     log.sendInfo(source, "To restore given backup you have to provide exact creation time in format:");
                     log.sendInfo(source, "[YEAR]-[MONTH]-[DAY]_[HOUR].[MINUTE].[SECOND]");
                     log.sendInfo(source, "Example: /backup restore 2020-08-05_10.58.33");
+                    log.sendInfo(source, "You may also type '/backup restore latest' to restore the freshest backup");
 
                     return 1;
                 });
@@ -78,21 +80,26 @@ public class RestoreBackupCommand {
         }
 
         LocalDateTime dateTime;
+        Optional<RestoreableFile> backupFile;
 
+        if(Objects.equals(file, "latest")) {
+            backupFile = RestoreHelper.getLatestAndLockIfPresent(source.getServer());
+            dateTime = backupFile.map(RestoreableFile::getCreationTime).orElse(LocalDateTime.now());
+        } else {
             try {
                 dateTime = LocalDateTime.from(Globals.defaultDateTimeFormatter.parse(file));
             } catch (DateTimeParseException e) {
                 throw CommandExceptions.DATE_TIME_PARSE_COMMAND_EXCEPTION_TYPE.create(e);
             }
 
-        Optional<RestoreableFile> backupFile = RestoreHelper.findFileAndLockIfPresent(dateTime, source.getServer());
+            backupFile = RestoreHelper.findFileAndLockIfPresent(dateTime, source.getServer());
+        }
 
-        if(backupFile.isPresent()) {
+        if(backupFile.isEmpty()) {
-            log.info("Found file to restore {}", backupFile.get().getFile().getFileName().toString());
-        } else {
             log.sendInfo(source, "No file created on {} was found!", dateTime.format(Globals.defaultDateTimeFormatter));
             return -1;
-        }
+        } else {
+            log.info("Found file to restore {}", backupFile.get().getFile().getFileName().toString());
 
             Globals.INSTANCE.setAwaitThread(
                     RestoreHelper.create(
@@ -108,5 +115,5 @@ public class RestoreBackupCommand {
 
             return 1;
         }
-
+    }
 }

src/main/java/net/szum123321/textile_backup/core/restore/RestoreHelper.java

@@ -50,6 +50,17 @@ public class RestoreHelper {
         return optionalFile;
     }
 
+    public static Optional<RestoreableFile> getLatestAndLockIfPresent( MinecraftServer server) {
+        var available = RestoreHelper.getAvailableBackups(server);
+
+        if(available.isEmpty()) return Optional.empty();
+        else {
+            var latest = available.getLast();
+            Globals.INSTANCE.setLockedFile(latest.getFile());
+            return Optional.of(latest);
+        }
+    }
+
     public static AwaitThread create(RestoreContext ctx) {
         if(ctx.initiator() == ActionInitiator.Player)
             log.info("Backup restoration was initiated by: {}", ctx.commandSource().getName());
@@ -67,11 +78,11 @@ public class RestoreHelper {
         );
     }
 
-    public static List<RestoreableFile> getAvailableBackups(MinecraftServer server) {
+    public static LinkedList<RestoreableFile> getAvailableBackups(MinecraftServer server) {
         Path root = Utilities.getBackupRootPath(Utilities.getLevelName(server));
 
-        return RestoreableFile.applyOnFiles(root, List.of(),
+        return RestoreableFile.applyOnFiles(root, new LinkedList<>(),
                 e -> log.error("Error while listing available backups", e),
-                s -> s.collect(Collectors.toList()));
+                s -> s.sorted().collect(Collectors.toCollection(LinkedList::new)));
     }
 }