|
| 1 | +/* |
| 2 | + * ExplodingAU - The automatic update system for ExplodingBottle projects. |
| 3 | + * Copyright (C) 2023 ExplodingBottle |
| 4 | + * |
| 5 | + * This program is free software: you can redistribute it and/or modify |
| 6 | + * it under the terms of the GNU General Public License as published by |
| 7 | + * the Free Software Foundation, either version 3 of the License, or |
| 8 | + * (at your option) any later version. |
| 9 | + * |
| 10 | + * This program is distributed in the hope that it will be useful, |
| 11 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | + * GNU General Public License for more details. |
| 14 | + * |
| 15 | + * You should have received a copy of the GNU General Public License |
| 16 | + * along with this program. If not, see <https://www.gnu.org/licenses/>. |
| 17 | + */ |
| 18 | +package io.github.explodingbottle.explodingau; |
| 19 | + |
| 20 | +import java.io.File; |
| 21 | +import java.io.FileInputStream; |
| 22 | +import java.io.FileOutputStream; |
| 23 | +import java.math.BigInteger; |
| 24 | +import java.security.MessageDigest; |
| 25 | +import java.util.ArrayList; |
| 26 | +import java.util.Properties; |
| 27 | + |
| 28 | +/** |
| 29 | + * This class contains utilities to register your application in the update |
| 30 | + * candidates list. |
| 31 | + * |
| 32 | + * @author ExplodingBottle |
| 33 | + * |
| 34 | + */ |
| 35 | +public class ExplodingAULib { |
| 36 | + |
| 37 | + /** |
| 38 | + * Preventing to construct this class. |
| 39 | + */ |
| 40 | + private ExplodingAULib() { |
| 41 | + throw new IllegalAccessError("Cannot construct this class."); |
| 42 | + } |
| 43 | + |
| 44 | + private static final String EXPLODING_AU_VERSION = "1.0.0.0"; |
| 45 | + |
| 46 | + /** |
| 47 | + * Computes the hash of a file. |
| 48 | + * |
| 49 | + * @param toHash The file to compute the hash. |
| 50 | + * @return The hash or {@code null} if it failed. |
| 51 | + */ |
| 52 | + public static String hashFile(File toHash) { |
| 53 | + try { |
| 54 | + MessageDigest md = MessageDigest.getInstance("SHA-256"); |
| 55 | + FileInputStream toRead = new FileInputStream(toHash); |
| 56 | + byte[] buffer = new byte[4096]; |
| 57 | + int read = toRead.read(buffer, 0, buffer.length); |
| 58 | + while (read != -1) { |
| 59 | + md.update(buffer, 0, read); |
| 60 | + read = toRead.read(buffer, 0, buffer.length); |
| 61 | + } |
| 62 | + toRead.close(); |
| 63 | + return new BigInteger(md.digest()).toString(32); |
| 64 | + |
| 65 | + } catch (Exception e) { |
| 66 | + |
| 67 | + } |
| 68 | + return null; |
| 69 | + } |
| 70 | + |
| 71 | + /** |
| 72 | + * Returns the AU folder root. |
| 73 | + * |
| 74 | + * @return The folder or null if error. |
| 75 | + */ |
| 76 | + public static File seekAUFolder() { |
| 77 | + File fold = new File(System.getProperty("user.home"), ".explodingau"); |
| 78 | + if (!fold.exists()) { |
| 79 | + if (fold.mkdir()) { |
| 80 | + return fold; |
| 81 | + } |
| 82 | + } else { |
| 83 | + return fold; |
| 84 | + } |
| 85 | + return null; |
| 86 | + } |
| 87 | + |
| 88 | + /** |
| 89 | + * Returns the loaded properties stored in the AU folder. |
| 90 | + * |
| 91 | + * @param auFolder A reference to the AU folder. |
| 92 | + * @return Returns the properties or null if failed. |
| 93 | + */ |
| 94 | + public static Properties loadPropsFromAUFolder(File auFolder) { |
| 95 | + Properties toRet = null; |
| 96 | + try { |
| 97 | + File auprops = new File(auFolder, "reglist.txt"); |
| 98 | + if (auprops.exists()) { |
| 99 | + Properties okProps = new Properties(); |
| 100 | + FileInputStream fis = new FileInputStream(auprops); |
| 101 | + okProps.loadFromXML(fis); |
| 102 | + fis.close(); |
| 103 | + toRet = okProps; |
| 104 | + } |
| 105 | + } catch (Exception e) { |
| 106 | + |
| 107 | + } |
| 108 | + return toRet; |
| 109 | + } |
| 110 | + |
| 111 | + /** |
| 112 | + * Saves the properties. |
| 113 | + * |
| 114 | + * @param auFolder Where is the AU folder. |
| 115 | + * @param props What are the properties to save. |
| 116 | + * @return If we managed to save or not. |
| 117 | + */ |
| 118 | + public static boolean storePropsToAUFolder(File auFolder, Properties props) { |
| 119 | + try { |
| 120 | + File auprops = new File(auFolder, "reglist.txt"); |
| 121 | + FileOutputStream fos = new FileOutputStream(auprops); |
| 122 | + props.storeToXML(fos, "ExplodingAU Version " + EXPLODING_AU_VERSION + " - Managed file"); |
| 123 | + fos.close(); |
| 124 | + return true; |
| 125 | + } catch (Exception e) { |
| 126 | + |
| 127 | + } |
| 128 | + return false; |
| 129 | + } |
| 130 | + |
| 131 | + public static void standardProgramRoutine(String programName) { |
| 132 | + File auFolder = seekAUFolder(); |
| 133 | + if (auFolder != null) { |
| 134 | + Properties lk = loadPropsFromAUFolder(auFolder); |
| 135 | + if (lk == null) { |
| 136 | + lk = new Properties(); |
| 137 | + } |
| 138 | + fileCfgRoutine(programName, lk); |
| 139 | + storePropsToAUFolder(auFolder, lk); |
| 140 | + } |
| 141 | + } |
| 142 | + |
| 143 | + /** |
| 144 | + * Starts the routine to update the list. |
| 145 | + * |
| 146 | + * @param programName The program identifier. |
| 147 | + * @param props The loaded properties |
| 148 | + * @return If we managed to do the update. |
| 149 | + */ |
| 150 | + public static void fileCfgRoutine(String programName, Properties props) { |
| 151 | + |
| 152 | + final Properties loaded = props; |
| 153 | + ArrayList<String> toRemove = new ArrayList<String>(); |
| 154 | + loaded.forEach((k, v) -> { |
| 155 | + String key = (String) k; |
| 156 | + String val = (String) v; |
| 157 | + File loc = new File(key); |
| 158 | + if (!loc.exists() || loc.isDirectory()) { |
| 159 | + toRemove.add(key); |
| 160 | + } else { |
| 161 | + String[] split = val.split(";"); |
| 162 | + if (split.length != 2) { |
| 163 | + toRemove.add(key); |
| 164 | + } else { |
| 165 | + String hash = split[1]; |
| 166 | + String hashToCompare = hashFile(loc); |
| 167 | + if (hashToCompare != null) { |
| 168 | + if (!hash.equalsIgnoreCase(hashToCompare)) { |
| 169 | + toRemove.add(key); |
| 170 | + } |
| 171 | + } |
| 172 | + } |
| 173 | + } |
| 174 | + }); |
| 175 | + if (programName != null) { |
| 176 | + try { |
| 177 | + File location = new File( |
| 178 | + ExplodingAULib.class.getProtectionDomain().getCodeSource().getLocation().toURI()); |
| 179 | + if (location != null && !location.isDirectory()) { |
| 180 | + String fHash = hashFile(location); |
| 181 | + loaded.put(location.getAbsolutePath(), programName + ";" + fHash); |
| 182 | + } |
| 183 | + } catch (Exception e) { |
| 184 | + } |
| 185 | + } |
| 186 | + toRemove.forEach(trm -> { |
| 187 | + loaded.remove(trm); |
| 188 | + }); |
| 189 | + |
| 190 | + } |
| 191 | + |
| 192 | +} |
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