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comparison mde/lookup/Options.d @ 81:d8fccaa45d5f

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Moved file IO code from mde/mergetag to mde/file[/mergetag] and changed how some errors are caught.
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 29 Aug 2008 11:59:43 +0100
parents ea58f277f487
children ac1e3fd07275
comparison
equal deleted inserted replaced
80:ea58f277f487 81:d8fccaa45d5f
22 module mde.lookup.Options; 22 module mde.lookup.Options;
23 23
24 import mde.setup.paths; 24 import mde.setup.paths;
25 import mde.exception; 25 import mde.exception;
26 26
27 import mde.mergetag.Reader; 27 import mde.file.mergetag.Reader;
28 import mde.mergetag.Writer; 28 import mde.file.mergetag.Writer;
29 import mde.mergetag.DataSet; 29 import mde.file.mergetag.DataSet;
30 import mde.mergetag.exception; 30 import mde.file.serialize;
31 import mde.mergetag.serialize;
32 31
33 import tango.core.Exception : ArrayBoundsException; 32 import tango.core.Exception : ArrayBoundsException;
34 import tango.util.log.Log : Log, Logger; 33 import tango.util.log.Log : Log, Logger;
35 34
36 /** Base class for handling options. 35 /** Base class for handling options.
132 * 131 *
133 * If the file doesn't exist, no reading is attempted (options are left at default values). 132 * If the file doesn't exist, no reading is attempted (options are left at default values).
134 */ 133 */
135 private const fileName = "options"; 134 private const fileName = "options";
136 void load () { 135 void load () {
137 // Check it exists (if not it should still be created on exit).
138 // Don't bother checking it's not a folder, because it could still be a block or something.
139 if (!confDir.exists (fileName)) return;
140
141 try { 136 try {
142 IReader reader; 137 IReader reader;
143 reader = confDir.makeMTReader (fileName, PRIORITY.LOW_HIGH); 138 reader = confDir.makeMTReader (fileName, PRIORITY.LOW_HIGH);
144 reader.dataSecCreator = delegate IDataSection(ID id) { 139 reader.dataSecCreator = delegate IDataSection(ID id) {
145 /* Recognise each defined section, and return null for unrecognised sections. */ 140 /* Recognise each defined section, and return null for unrecognised sections. */
146 Options* p = id in subClasses; 141 Options* p = id in subClasses;
147 if (p !is null) return *p; 142 if (p !is null) return *p;
148 else return null; 143 else return null;
149 }; 144 };
150 reader.read; 145 reader.read;
151 } catch (MTException e) { 146 } catch (NoFileException e) {
152 logger.fatal ("Loading options aborted:"); 147 // Just return. Options file will be created on exit.
153 logger.fatal (e.msg); 148 } catch (Exception e) {
154 throw new optionsLoadException ("Mergetag exception (see above message)"); 149 logger.warn ("Loading options failed: "~e.msg);
150 logger.warn ("If warning persists, delete the offending file."); // FIXME - delete the bad file somehow
155 } 151 }
156 } 152 }
157 void save () { 153 void save () {
158 if (!changed) return; // no changes to save 154 if (!changed) return; // no changes to save
159 155
168 return null; // All recognised sections are already in the dataset. 164 return null; // All recognised sections are already in the dataset.
169 }; 165 };
170 reader.read; 166 reader.read;
171 } catch (NoFileException) { 167 } catch (NoFileException) {
172 // No user file exists; not an error. 168 // No user file exists; not an error.
173 } catch (MTException e) { 169 } catch (Exception e) {
174 // Log a message and continue, overwriting the file: 170 // Log a message and continue, overwriting the file:
175 logger.error ("Loading options aborted:"); 171 logger.error ("Loading options aborted: " ~ e.msg);
176 logger.error (e.msg);
177 } 172 }
178 173
179 try { 174 try {
180 IWriter writer; 175 IWriter writer;
181 writer = confDir.makeMTWriter (fileName, ds); 176 writer = confDir.makeMTWriter (fileName, ds);
182 writer.write(); 177 writer.write();
183 } catch (MTException e) { 178 } catch (Exception e) {
184 logger.error ("Saving options aborted! Reason:"); 179 logger.error ("Saving options aborted: "~e.msg);
185 logger.error (e.msg);
186 } 180 }
187 } 181 }
188 182
189 private Logger logger; 183 private Logger logger;
190 static this() { 184 static this() {