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package com.keuin.kbackupfabric.backup.name;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
/**
* Encode and decode backup file name for a specific backup type.
*/
public interface BackupFileNameEncoder {
/**
* Construct full backup file name from custom name and creation time.
* @param customName the custom name. If the custom name contains invalid chars, an exception will be thrown.
* @param time the creation time.
* @return the file name.
*/
String encode(String customName, LocalDateTime time);
/**
* Extract custom and backup time from backup file name.
*
* @param fileName the backup file name.
* @return the information. If the given file name is invalid, return null.
*/
BackupBasicInformation decode(String fileName);
default boolean isValidFileName(String fileName) {
return decode(fileName) != null;
}
/**
* Check if the given string is a valid custom backup name.
*
* @param customName the custom backup name.
* @return if the name is valid.
*/
default boolean isValidCustomName(String customName) {
final char[] ILLEGAL_CHARACTERS = {'/', '\n', '\r', '\t', '\0', '\f', '`', '?', '*', '\\', '<', '>', '|', '\"', ':'};
for (char c : ILLEGAL_CHARACTERS) {
if (customName.contains(String.valueOf(c))) {
return false;
}
}
return true;
}
class BackupBasicInformation {
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;
}
@Override
public String toString() {
return String.format("%s, %s", customName, time.format(formatter));
}
}
}
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