| 1 | package org.apollo.io;
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| 2 |
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| 3 | import java.io.BufferedReader;
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| 4 | import java.io.File;
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| 5 | import java.io.FileReader;
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| 6 | import java.io.FileWriter;
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| 7 | import java.io.IOException;
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| 8 | import java.io.UnsupportedEncodingException;
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| 9 | import java.util.Random;
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| 10 |
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| 11 | import org.apollo.audio.structure.AudioStructureModel;
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| 12 | import org.apollo.util.ApolloSystemLog;
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| 13 | import org.apollo.util.RegExpFileFilter;
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| 14 | import org.expeditee.auth.AuthenticatorBrowser;
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| 15 | import org.expeditee.gui.FrameIO;
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| 16 | import org.expeditee.settings.UserSettings;
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| 17 |
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| 18 | /**
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| 19 | * Generates audio paths.
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| 20 | *
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| 21 | * @author Brook Novak
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| 22 | *
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| 23 | */
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| 24 | public class AudioPathManager {
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| 25 |
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| 26 | private AudioPathManager() {
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| 27 | // util constructor
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| 28 | }
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| 29 |
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| 30 | /** Suffixed with the native file separator */
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| 31 | public static String AUDIO_HOME_DIRECTORY = null;
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| 32 |
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| 33 | /** Stores all virtual names created by this repository. */
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| 34 | private static final String VIRTUAL_NAME_BASEFILE = ".vnames";
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| 35 |
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| 36 | public static final int PREAMBLE_LENGTH = 6;
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| 37 |
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| 38 | private static long counter = 0;
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| 39 |
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| 40 | private static Random rand = new Random(System.currentTimeMillis());
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| 41 |
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| 42 | // **** DB
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| 43 | // Some work to be done here => remove dependency in code on 'AUDIO_HOME_DIRECTORY'
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| 44 | // and change it to use audio dir list from UserSettings
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| 45 | public static void changeParentAndSubFolders(String newFolder) {
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| 46 |
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| 47 | if (Boolean.getBoolean("auth") && System.getProperty("user.name").equals(AuthenticatorBrowser.USER_NOBODY)) {
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| 48 | System.err.println("**** AudioPathManager::changeParentAndSubFolder(): Nothing to do for user '" + AuthenticatorBrowser.USER_NOBODY + "'");
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| 49 | return;
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| 50 | }
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| 51 |
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| 52 | if (UserSettings.PublicAndPrivateResources) {
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| 53 | //String resourcesPublicPath = FrameIO.PARENT_FOLDER + "resources-public" + File.separator;
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| 54 | String userName = UserSettings.UserName.get();
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| 55 | //String resourcesPrivateIndividualPath = FrameIO.PARENT_FOLDER + "resources-" + userName + File.separator;
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| 56 | if (Boolean.getBoolean("auth")) {
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| 57 | System.err.println("**** AudioPathManager::changeParentAndSubFolder(): Setting 'audio' folder to resources-" + userName);
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| 58 | }
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| 59 | //AUDIO_HOME_DIRECTORY = resourcesPrivateIndividualPath + "audio" + File.separatorChar;
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| 60 | AUDIO_HOME_DIRECTORY = FrameIO.AUDIO_PRIVATE_PATH;
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| 61 | }
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| 62 | else {
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| 63 | AUDIO_HOME_DIRECTORY = FrameIO.PARENT_FOLDER + "audio" + File.separatorChar;;
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | public static void activateAndScanAudioDir()
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| 68 | {
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| 69 | changeParentAndSubFolders(FrameIO.PARENT_FOLDER);
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| 70 |
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| 71 | // Ensure audio directory exists
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| 72 | File dir = new File(AUDIO_HOME_DIRECTORY);
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| 73 | if (!dir.exists()) {
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| 74 | if (!dir.mkdir()) {
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| 75 | ApolloSystemLog.println("Unable to create missing audio home directory");
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| 76 | }
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| 77 | }
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| 78 |
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| 79 | // Load counter
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| 80 | loadCounter(AUDIO_HOME_DIRECTORY);
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| 81 | }
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| 82 |
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| 83 |
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| 84 | /**
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| 85 | * Loads the counter
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| 86 | * @param dir The dir where the audio files live.
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| 87 | */
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| 88 | private static void loadCounter(String audio_dir_str) {
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| 89 | File audio_dir = new File(audio_dir_str);
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| 90 |
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| 91 | String[] files = getAudioFileNames(audio_dir);
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| 92 | if (files == null) { // Due to IO exception
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| 93 | ApolloSystemLog.printError("Failed to read audio directory");
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| 94 | return;
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| 95 | }
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| 96 | long count = 0;
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| 97 | if (files != null) {
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| 98 | for (String f : files) {
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| 99 |
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| 100 | int start = -1, end = -1;
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| 101 | for (int i = 0; i < f.length(); i++) {
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| 102 | if (Character.isDigit(f.charAt(i)) && start == -1) {
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| 103 | start = i;
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| 104 | } else if (!Character.isDigit(f.charAt(i)) && start != -1) {
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| 105 | end = i;
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| 106 | break;
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | if (start >= 0 && end == -1) {
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| 111 | end = f.length();
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| 112 | }
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| 113 |
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| 114 | if (start > 0 && end >= start) { // not start >= 0 since missing preable
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| 115 |
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| 116 | String tmp = f.substring(start, end);
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| 117 | long l = Long.parseLong(tmp);
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| 118 | if (l >= count)
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| 119 | count = l + 1;
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| 120 | }
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| 121 | }
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| 122 | }
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| 123 |
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| 124 | counter = count;
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| 125 | }
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| 126 |
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| 127 | /**
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| 128 | * @param dir
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| 129 | * @return
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| 130 | * Null if an IO exception occurs
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| 131 | */
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| 132 | private static String[] getAudioFileNames(File dir) {
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| 133 | return dir.list(new RegExpFileFilter("^[A-Z]+\\d+.*$"));
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| 134 | }
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| 135 |
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| 136 | /**
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| 137 | * @return
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| 138 | * The list of audio files in the audio home directory.
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| 139 | * Can be empty. Null if directory does not exist or failed to
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| 140 | * read list of files.
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| 141 | */
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| 142 | public static String[] getAudioFileNames() {
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| 143 | File audioDir = new File(AUDIO_HOME_DIRECTORY);
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| 144 | if (!audioDir.exists() || !audioDir.isDirectory()) return null;
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| 145 | return getAudioFileNames(audioDir);
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| 146 | }
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| 147 |
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| 148 |
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| 149 | /**
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| 150 | * @return The current counter.
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| 151 | */
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| 152 | public static long getCounter() {
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| 153 | return counter;
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| 154 | }
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| 155 |
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| 156 | /**
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| 157 | * Generates a filename that is unique within the AUDIO_HOME_DIRECTORY.
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| 158 | *
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| 159 | * @param extension
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| 160 | * The extension of the filename to generate. Exclude period.
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| 161 | *
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| 162 | * @return
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| 163 | * A free unused filename with the given extension. Excludes directory.
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| 164 | * Even if the path return is not used, it will never be re-generated.
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| 165 | */
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| 166 | public static String generateLocateFileName(String extension) {
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| 167 |
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| 168 | String filename = generateRandomFilenameBase() + "." + extension;
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| 169 |
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| 170 | File f = new File(AUDIO_HOME_DIRECTORY + filename);
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| 171 |
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| 172 | if (AudioStructureModel.getInstance().getTrackGraphInfo(filename, null) != null ||
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| 173 | f.exists()) { // recurse: until found a free path:
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| 174 | return generateLocateFileName(extension);
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| 175 | }
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| 176 |
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| 177 | return filename;
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| 178 | }
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| 179 |
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| 180 | private static String generateRandomFilenameBase() {
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| 181 |
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| 182 | counter++;
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| 183 | if (counter < 0) counter = 0; // wraps positivey
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| 184 |
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| 185 | // Generate random alpha preamble
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| 186 | byte[] bytes = new byte[PREAMBLE_LENGTH];
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| 187 | rand.nextBytes(bytes);
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| 188 |
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| 189 |
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| 190 | for (int i = 0; i < PREAMBLE_LENGTH; i++) {
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| 191 | if (bytes[i] < 0) bytes[i] *= -1;
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| 192 | int alphacap = (65 + (Math.abs(bytes[i]) % 26)); // A-Z in US ASCII encoding
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| 193 | bytes[i] = (byte) alphacap;
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| 194 |
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| 195 | }
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| 196 |
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| 197 | // Decode ASCII Byte array to javas UTF-16 encoding
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| 198 | String preamble = null;
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| 199 |
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| 200 | try {
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| 201 | preamble = new String(bytes, "US-ASCII");
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| 202 | } catch (UnsupportedEncodingException e) {
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| 203 | e.printStackTrace();
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| 204 | preamble = "AUDIO";
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| 205 | }
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| 206 |
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| 207 | // Build the filename string
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| 208 | return preamble + counter;
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| 209 |
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| 210 | }
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| 211 |
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| 212 |
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| 213 |
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| 214 | /**
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| 215 | * Lots of room for improvement here, ensures that a virtual filename is unique .. stores
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| 216 | * allocated virtual filenames on file.
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| 217 | *
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| 218 | * @return
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| 219 | * The new virtual filename.
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| 220 | */
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| 221 | public static String generateVirtualFilename() {
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| 222 |
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| 223 | // Ensure that the name base file exists. Assumes the audio home directory exists.
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| 224 | File vnameBase = new File(AUDIO_HOME_DIRECTORY + VIRTUAL_NAME_BASEFILE);
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| 225 | if (!vnameBase.exists()) {
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| 226 | try {
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| 227 | vnameBase.createNewFile();
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| 228 | } catch (IOException e) {
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| 229 | e.printStackTrace();
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| 230 | }
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| 231 | }
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| 232 |
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| 233 | String vname = null;
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| 234 |
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| 235 | while (vname == null) {
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| 236 | vname = generateRandomFilenameBase() + ".vrt";
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| 237 | assert(vname != null);
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| 238 |
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| 239 | BufferedReader in = null;
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| 240 | String line = null;
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| 241 |
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| 242 | try {
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| 243 |
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| 244 | // Open the vbase for reading
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| 245 | in = new BufferedReader(new FileReader(vnameBase));
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| 246 |
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| 247 | // Read the sbase file and check all names
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| 248 | while ((line = in.readLine()) != null) {
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| 249 | line = line.trim();
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| 250 | if (line.equalsIgnoreCase(vname)) break;
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| 251 | }
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| 252 |
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| 253 | } catch (Exception e) {
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| 254 | e.printStackTrace();
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| 255 | break; // just use the last generated filename...
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| 256 |
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| 257 | // Clean up
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| 258 | } finally {
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| 259 | if (in != null) {
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| 260 | try {
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| 261 | in.close();
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| 262 | } catch (IOException e) {
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| 263 | e.printStackTrace();
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| 264 | }
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| 265 | }
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| 266 | }
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| 267 |
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| 268 | // Check to see if name is infact unique
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| 269 | if (AudioStructureModel.getInstance().getLinkedTrackGraphInfo(vname, null) == null &&
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| 270 | (line == null || !line.equalsIgnoreCase(vname))) {
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| 271 | // If so, then enter new entry into the db.
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| 272 | FileWriter out = null;
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| 273 |
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| 274 | try {
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| 275 | // Open the vbase for appending
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| 276 | out = new FileWriter(vnameBase, true);
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| 277 | out.write("\n" + vname);
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| 278 |
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| 279 | } catch (IOException e) {
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| 280 | e.printStackTrace();
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| 281 |
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| 282 | // Clean up
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| 283 | } finally {
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| 284 | if (out != null) {
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| 285 | try {
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| 286 | out.close();
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| 287 | } catch (IOException e) {
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| 288 | e.printStackTrace();
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| 289 | }
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| 290 | }
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| 291 | }
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| 292 |
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| 293 | } else vname = null;
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| 294 | }
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| 295 |
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| 296 | // Return the generated vname
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| 297 | return vname;
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| 298 |
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| 299 | }
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| 300 | }
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