| 1 | package be.nikiroo.fanfix; |
| 2 | |
| 3 | import java.io.File; |
| 4 | import java.io.IOException; |
| 5 | |
| 6 | import be.nikiroo.fanfix.bundles.Config; |
| 7 | import be.nikiroo.fanfix.bundles.ConfigBundle; |
| 8 | import be.nikiroo.fanfix.bundles.StringIdBundle; |
| 9 | import be.nikiroo.utils.resources.Bundles; |
| 10 | |
| 11 | /** |
| 12 | * Global state for the program (services and singletons). |
| 13 | * |
| 14 | * @author niki |
| 15 | */ |
| 16 | public class Instance { |
| 17 | private static ConfigBundle config; |
| 18 | private static StringIdBundle trans; |
| 19 | private static Cache cache; |
| 20 | private static Library lib; |
| 21 | private static boolean debug; |
| 22 | private static File coverDir; |
| 23 | private static File readerTmp; |
| 24 | |
| 25 | static { |
| 26 | // Most of the rest is dependant upon this: |
| 27 | config = new ConfigBundle(); |
| 28 | |
| 29 | trans = new StringIdBundle(getLang()); |
| 30 | lib = new Library(getFile(Config.LIBRARY_DIR)); |
| 31 | debug = Instance.getConfig().getBoolean(Config.DEBUG_ERR, false); |
| 32 | coverDir = getFile(Config.DEFAULT_COVERS_DIR); |
| 33 | File tmp = getFile(Config.CACHE_DIR); |
| 34 | readerTmp = getFile(Config.CACHE_DIR_LOCAL_READER); |
| 35 | |
| 36 | if (checkEnv("NOUTF")) { |
| 37 | trans.setUnicode(false); |
| 38 | } |
| 39 | |
| 40 | if (checkEnv("DEBUG")) { |
| 41 | debug = true; |
| 42 | } |
| 43 | |
| 44 | if (tmp == null || readerTmp == null) { |
| 45 | String tmpDir = System.getProperty("java.io.tmpdir"); |
| 46 | if (tmpDir != null) { |
| 47 | if (tmp == null) { |
| 48 | tmp = new File(tmpDir, "fanfic-tmp"); |
| 49 | } |
| 50 | if (readerTmp == null) { |
| 51 | readerTmp = new File(tmpDir, "fanfic-reader"); |
| 52 | } |
| 53 | } else { |
| 54 | syserr(new IOException( |
| 55 | "The system does not have a default temporary directory")); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | if (coverDir != null && !coverDir.exists()) { |
| 60 | syserr(new IOException( |
| 61 | "The 'default covers' directory does not exists: " |
| 62 | + coverDir)); |
| 63 | coverDir = null; |
| 64 | } |
| 65 | |
| 66 | String configDir = System.getenv("CONFIG_DIR"); |
| 67 | if (configDir != null) { |
| 68 | if (new File(configDir).isDirectory()) { |
| 69 | Bundles.setDirectory(configDir); |
| 70 | try { |
| 71 | config = new ConfigBundle(); |
| 72 | config.updateFile(configDir); |
| 73 | } catch (IOException e) { |
| 74 | syserr(e); |
| 75 | } |
| 76 | try { |
| 77 | trans = new StringIdBundle(getLang()); |
| 78 | trans.updateFile(configDir); |
| 79 | } catch (IOException e) { |
| 80 | syserr(e); |
| 81 | } |
| 82 | } else { |
| 83 | syserr(new IOException("Configuration directory not found: " |
| 84 | + configDir)); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | try { |
| 89 | String ua = config.getString(Config.USER_AGENT); |
| 90 | int hours = config.getInteger(Config.CACHE_MAX_TIME_CHANGING, -1); |
| 91 | int hoursLarge = config |
| 92 | .getInteger(Config.CACHE_MAX_TIME_STABLE, -1); |
| 93 | |
| 94 | cache = new Cache(tmp, ua, hours, hoursLarge); |
| 95 | } catch (IOException e) { |
| 96 | syserr(new IOException( |
| 97 | "Cannot create cache (will continue without cache)", e)); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Get the (unique) configuration service for the program. |
| 103 | * |
| 104 | * @return the configuration service |
| 105 | */ |
| 106 | public static ConfigBundle getConfig() { |
| 107 | return config; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Get the (unique) {@link Cache} for the program. |
| 112 | * |
| 113 | * @return the {@link Cache} |
| 114 | */ |
| 115 | public static Cache getCache() { |
| 116 | return cache; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Get the (unique) {link StringIdBundle} for the program. |
| 121 | * |
| 122 | * @return the {link StringIdBundle} |
| 123 | */ |
| 124 | public static StringIdBundle getTrans() { |
| 125 | return trans; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Get the (unique) {@link Library} for the program. |
| 130 | * |
| 131 | * @return the {@link Library} |
| 132 | */ |
| 133 | public static Library getLibrary() { |
| 134 | return lib; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Return the directory where to look for default cover pages. |
| 139 | * |
| 140 | * @return the default covers directory |
| 141 | */ |
| 142 | public static File getCoverDir() { |
| 143 | return coverDir; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Return the directory where to store temporary files for the local reader. |
| 148 | * |
| 149 | * @return the directory |
| 150 | */ |
| 151 | public static File getReaderDir() { |
| 152 | return readerTmp; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Report an error to the user |
| 157 | * |
| 158 | * @param e |
| 159 | * the {@link Exception} to report |
| 160 | */ |
| 161 | public static void syserr(Exception e) { |
| 162 | if (debug) { |
| 163 | e.printStackTrace(); |
| 164 | } else { |
| 165 | System.err.println(e.getMessage()); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Return a path, but support the special $HOME variable. |
| 171 | * |
| 172 | * @return the path |
| 173 | */ |
| 174 | private static File getFile(Config id) { |
| 175 | File file = null; |
| 176 | String path = config.getString(id); |
| 177 | if (path != null && !path.isEmpty()) { |
| 178 | path = path.replace('/', File.separatorChar); |
| 179 | if (path.contains("$HOME")) { |
| 180 | path = path.replace("$HOME", |
| 181 | "" + System.getProperty("user.home")); |
| 182 | } |
| 183 | |
| 184 | file = new File(path); |
| 185 | } |
| 186 | |
| 187 | return file; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * The language to use for the application (NULL = default system language). |
| 192 | * |
| 193 | * @return the language |
| 194 | */ |
| 195 | private static String getLang() { |
| 196 | String lang = config.getString(Config.LANG); |
| 197 | |
| 198 | if (System.getenv("LANG") != null && !System.getenv("LANG").isEmpty()) { |
| 199 | lang = System.getenv("LANG"); |
| 200 | } |
| 201 | |
| 202 | if (lang != null && lang.isEmpty()) { |
| 203 | lang = null; |
| 204 | } |
| 205 | |
| 206 | return lang; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Check that the given environment variable is "enabled". |
| 211 | * |
| 212 | * @param key |
| 213 | * the variable to check |
| 214 | * |
| 215 | * @return TRUE if it is |
| 216 | */ |
| 217 | private static boolean checkEnv(String key) { |
| 218 | String value = System.getenv(key); |
| 219 | if (value != null) { |
| 220 | value = value.trim().toLowerCase(); |
| 221 | if ("yes".equals(value) || "true".equals(value) |
| 222 | || "on".equals(value) || "1".equals(value) |
| 223 | || "y".equals(value)) { |
| 224 | return true; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | return false; |
| 229 | } |
| 230 | } |