git.basschouten.com Git - openhab-addons.git/blob

   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.folderwatcher.internal.common;
  14
  15 import java.io.BufferedWriter;
  16 import java.io.File;
  17 import java.io.FileWriter;
  18 import java.io.IOException;
  19 import java.nio.file.Files;
  20 import java.util.List;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23
  24 /**
  25  * The {@link WatcherCommon} class contains commonly used methods.
  26  *
  27  * @author Alexandr Salamatov - Initial contribution
  28  */
  29 @NonNullByDefault
  30 public class WatcherCommon {
  31
  32     private static void initFile(File file, String watchDir) throws IOException {
  33         try (BufferedWriter fileWriter = new BufferedWriter(new FileWriter(file))) {
  34             fileWriter.write(watchDir);
  35             fileWriter.newLine();
  36         }
  37     }
  38
  39     public static List<String> initStorage(File file, String watchDir) throws IOException {
  40         List<String> returnList = List.of();
  41         List<String> currentFileListing = List.of();
  42         if (!file.exists()) {
  43             Files.createDirectories(file.toPath().getParent());
  44             initFile(file, watchDir);
  45         } else {
  46             currentFileListing = Files.readAllLines(file.toPath().toAbsolutePath());
  47             if (currentFileListing.get(0).equals(watchDir)) {
  48                 returnList = currentFileListing;
  49             } else {
  50                 initFile(file, watchDir);
  51             }
  52         }
  53         return returnList;
  54     }
  55
  56     public static void saveNewListing(List<String> newList, File listingFile) throws IOException {
  57         try (BufferedWriter fileWriter = new BufferedWriter(new FileWriter(listingFile, true))) {
  58             for (String newFile : newList) {
  59                 fileWriter.write(newFile);
  60                 fileWriter.newLine();
  61             }
  62         }
  63     }
  64 }