Source Code Cross Referenced for ThemeManagerImpl.java in  » Blogger-System » apache-roller-3.1 » org » apache » roller » business » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Blogger System » apache roller 3.1 » org.apache.roller.business 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  The ASF licenses this file to You
004:         * under the Apache License, Version 2.0 (the "License"); you may not
005:         * use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.  For additional information regarding
015:         * copyright in this work, please see the NOTICE file in the top level
016:         * directory of this distribution.
017:         */
018:
019:        package org.apache.roller.business;
020:
021:        import java.io.File;
022:        import java.io.FileInputStream;
023:        import java.io.FileNotFoundException;
024:        import java.io.FilenameFilter;
025:        import java.io.InputStreamReader;
026:        import java.util.ArrayList;
027:        import java.util.Collection;
028:        import java.util.Collections;
029:        import java.util.Date;
030:        import java.util.HashMap;
031:        import java.util.Iterator;
032:        import java.util.List;
033:        import java.util.Map;
034:        import org.apache.commons.logging.Log;
035:        import org.apache.commons.logging.LogFactory;
036:        import org.apache.roller.RollerException;
037:        import org.apache.roller.business.ThemeNotFoundException;
038:        import org.apache.roller.config.RollerConfig;
039:        import org.apache.roller.business.FileIOException;
040:        import org.apache.roller.business.FileManager;
041:        import org.apache.roller.business.FilePathException;
042:        import org.apache.roller.business.RollerFactory;
043:        import org.apache.roller.business.ThemeManager;
044:        import org.apache.roller.business.UserManager;
045:        import org.apache.roller.pojos.Theme;
046:        import org.apache.roller.pojos.ThemeTemplate;
047:        import org.apache.roller.pojos.WeblogTemplate;
048:        import org.apache.roller.pojos.WebsiteData;
049:
050:        /**
051:         * Base implementation of a ThemeManager.
052:         * 
053:         * This particular implementation reads theme data off the filesystem 
054:         * and assumes that those themes are not changable at runtime.
055:         */
056:        public class ThemeManagerImpl implements  ThemeManager {
057:
058:            private static Log log = LogFactory.getLog(ThemeManagerImpl.class);
059:
060:            // directory where themes are kept
061:            private String themeDir = null;
062:
063:            // the Map contains ... (theme name, Theme)
064:            private Map themes = null;
065:
066:            protected ThemeManagerImpl() {
067:
068:                log.debug("Initializing ThemeManagerImpl");
069:
070:                // get theme directory from config and verify it
071:                this .themeDir = RollerConfig.getProperty("themes.dir");
072:                if (themeDir == null || themeDir.trim().length() < 1) {
073:                    throw new RuntimeException(
074:                            "couldn't get themes directory from config");
075:                } else {
076:                    // chop off trailing slash if it exists
077:                    if (themeDir.endsWith("/")) {
078:                        themeDir = themeDir.substring(0, themeDir.length() - 1);
079:                    }
080:
081:                    // make sure it exists and is readable
082:                    File themeDirFile = new File(themeDir);
083:                    if (!themeDirFile.exists() || !themeDirFile.isDirectory()
084:                            || !themeDirFile.canRead()) {
085:                        throw new RuntimeException(
086:                                "couldn't access theme dir [" + themeDir + "]");
087:                    }
088:
089:                    // rather than be lazy we are going to load all themes from
090:                    // the disk preemptively during initialization and cache them
091:                    this .themes = loadAllThemesFromDisk();
092:
093:                    log.info("Loaded " + this .themes.size()
094:                            + " themes from disk.");
095:                }
096:            }
097:
098:            /**
099:             * @see org.apache.roller.model.ThemeManager#getTheme(java.lang.String)
100:             */
101:            public Theme getTheme(String name) throws ThemeNotFoundException,
102:                    RollerException {
103:
104:                Theme theme = (Theme) this .themes.get(name);
105:                if (theme == null)
106:                    throw new ThemeNotFoundException("Couldn't find theme ["
107:                            + name + "]");
108:
109:                return theme;
110:            }
111:
112:            /**
113:             * @see org.apache.roller.model.ThemeManager#getEnabledThemesList()
114:             */
115:            public List getEnabledThemesList() {
116:
117:                Collection all_themes = this .themes.values();
118:
119:                // make a new list of only the enabled themes
120:                List enabled_themes = new ArrayList();
121:                Iterator it = all_themes.iterator();
122:                Theme theme = null;
123:                while (it.hasNext()) {
124:                    theme = (Theme) it.next();
125:                    if (theme.isEnabled())
126:                        enabled_themes.add(theme.getName());
127:                }
128:
129:                // sort 'em ... the natural sorting order for Strings is alphabetical
130:                Collections.sort(enabled_themes);
131:
132:                return enabled_themes;
133:            }
134:
135:            /**
136:             * @see org.apache.roller.model.ThemeManager#importTheme(website, theme)
137:             */
138:            public void importTheme(WebsiteData website, Theme theme)
139:                    throws RollerException {
140:
141:                log.debug("Importing theme " + theme.getName() + " to weblog "
142:                        + website.getName());
143:
144:                try {
145:                    UserManager userMgr = RollerFactory.getRoller()
146:                            .getUserManager();
147:
148:                    Collection templates = theme.getTemplates();
149:                    Iterator iter = templates.iterator();
150:                    ThemeTemplate theme_template = null;
151:                    while (iter.hasNext()) {
152:                        theme_template = (ThemeTemplate) iter.next();
153:
154:                        WeblogTemplate template = null;
155:
156:                        if (theme_template.getName().equals(
157:                                WeblogTemplate.DEFAULT_PAGE)) {
158:                            // this is the main Weblog template
159:                            try {
160:                                template = userMgr.getPage(website
161:                                        .getDefaultPageId());
162:                            } catch (Exception e) {
163:                                // user may not have a default page yet
164:                            }
165:                        } else {
166:                            // any other template
167:                            template = userMgr.getPageByName(website,
168:                                    theme_template.getName());
169:                        }
170:
171:                        if (template != null) {
172:                            // User already has page by that name, so overwrite it.
173:                            template.setContents(theme_template.getContents());
174:                            template.setLink(theme_template.getLink());
175:
176:                        } else {
177:                            // User does not have page by that name, so create new page.
178:                            template = new WeblogTemplate(null, // id
179:                                    website, // website
180:                                    theme_template.getName(), // name
181:                                    theme_template.getDescription(), // description
182:                                    theme_template.getLink(), // link
183:                                    theme_template.getContents(), // contents
184:                                    new Date(), // last mod
185:                                    theme_template.getTemplateLanguage(), // temp lang
186:                                    theme_template.isHidden(), // hidden
187:                                    theme_template.isNavbar(), // navbar
188:                                    theme_template.getDecoratorName() // decorator
189:                            );
190:                            userMgr.savePage(template);
191:                        }
192:                    }
193:
194:                    // now update this website's theme to custom
195:                    website.setEditorTheme(Theme.CUSTOM);
196:
197:                    // if this is the first time someone is customizing a theme then
198:                    // we need to set a default page
199:                    if (website.getDefaultPageId() == null
200:                            || website.getDefaultPageId().trim().equals("")
201:                            || website.getDefaultPageId().equals("dummy")) {
202:                        // we have to go back to the db to figure out the id
203:                        WeblogTemplate template = userMgr.getPageByName(
204:                                website, "Weblog");
205:                        if (template != null) {
206:                            log.debug("Setting default page to "
207:                                    + template.getId());
208:                            website.setDefaultPageId(template.getId());
209:                        }
210:                    }
211:
212:                    // we also want to set the weblogdayid
213:                    WeblogTemplate dayTemplate = userMgr.getPageByName(website,
214:                            "_day");
215:                    if (dayTemplate != null) {
216:                        log.debug("Setting default day page to "
217:                                + dayTemplate.getId());
218:                        website.setWeblogDayPageId(dayTemplate.getId());
219:                    }
220:
221:                    // save our updated website
222:                    userMgr.saveWebsite(website);
223:
224:                    // now lets import all the theme resources
225:                    FileManager fileMgr = RollerFactory.getRoller()
226:                            .getFileManager();
227:
228:                    List resources = theme.getResources();
229:                    Iterator iterat = resources.iterator();
230:                    File resourceFile = null;
231:                    while (iterat.hasNext()) {
232:                        resourceFile = (File) iterat.next();
233:
234:                        String path = resourceFile.getAbsolutePath().substring(
235:                                this .themeDir.length()
236:                                        + theme.getName().length() + 1);
237:
238:                        // make sure path isn't prefixed with a /
239:                        if (path.startsWith("/")) {
240:                            path = path.substring(1);
241:                        }
242:
243:                        log.debug("Importing resource "
244:                                + resourceFile.getAbsolutePath() + " to "
245:                                + path);
246:
247:                        try {
248:                            if (resourceFile.isDirectory()) {
249:                                fileMgr.createDirectory(website, path);
250:                            } else {
251:                                fileMgr.saveFile(website, path, "text/plain",
252:                                        resourceFile.length(),
253:                                        new FileInputStream(resourceFile));
254:                            }
255:                        } catch (Exception ex) {
256:                            log.info(ex);
257:                        }
258:                    }
259:
260:                } catch (Exception e) {
261:                    log.error("ERROR in action", e);
262:                    throw new RollerException(e);
263:                }
264:            }
265:
266:            /**
267:             * This is a convenience method which loads all the theme data from
268:             * themes stored on the filesystem in the roller webapp /themes/ directory.
269:             */
270:            private Map loadAllThemesFromDisk() {
271:
272:                Map themes = new HashMap();
273:
274:                String themespath = RollerConfig.getProperty("themes.dir");
275:                if (themespath.endsWith(File.separator)) {
276:                    themespath.substring(0, themespath.length() - 1);
277:                }
278:
279:                // first, get a list of the themes available
280:                File themesdir = new File(themespath);
281:                FilenameFilter filter = new FilenameFilter() {
282:                    public boolean accept(File dir, String name) {
283:                        File file = new File(dir.getAbsolutePath()
284:                                + File.separator + name);
285:                        return file.isDirectory();
286:                    }
287:                };
288:                String[] themenames = themesdir.list(filter);
289:
290:                if (themenames == null)
291:                    themenames = new String[0];
292:
293:                // now go through each theme and read all it's templates
294:                Theme theme = null;
295:                for (int i = 0; i < themenames.length; i++) {
296:                    try {
297:                        theme = this .loadThemeFromDisk(themenames[i],
298:                                themespath + File.separator + themenames[i]);
299:                        themes.put(theme.getName(), theme);
300:                    } catch (Throwable unexpected) {
301:                        // shouldn't happen, so let's learn why it did
302:                        log.error("Problem reading theme " + themenames[i],
303:                                unexpected);
304:                    }
305:                }
306:
307:                return themes;
308:            }
309:
310:            /**
311:             * Another convenience method which knows how to load a single theme
312:             * off the filesystem and return a Theme object
313:             */
314:            private Theme loadThemeFromDisk(String theme_name, String themepath) {
315:
316:                log.info("Loading theme " + theme_name);
317:
318:                Theme theme = new Theme();
319:                theme.setName(theme_name);
320:                theme.setAuthor("Roller");
321:                theme.setLastEditor("Roller");
322:                theme.setEnabled(true);
323:
324:                // start by getting a list of the .vm files for this theme
325:                File themedir = new File(themepath);
326:                FilenameFilter filter = new FilenameFilter() {
327:                    public boolean accept(File dir, String name) {
328:                        return name.endsWith(".vm");
329:                    }
330:                };
331:                String[] templates = themedir.list(filter);
332:
333:                // go through each .vm file and read in its contents to a ThemeTemplate
334:                String template_name = null;
335:                ThemeTemplate theme_template = null;
336:                for (int i = 0; i < templates.length; i++) {
337:                    // strip off the .vm part
338:                    template_name = templates[i].substring(0, templates[i]
339:                            .length() - 3);
340:                    File template_file = new File(themepath + File.separator
341:                            + templates[i]);
342:
343:                    // Continue reading theme even if problem encountered with one file
344:                    String msg = "read theme template file [" + template_file
345:                            + "]";
346:                    if (!template_file.exists() && !template_file.canRead()) {
347:                        log.error("Couldn't " + msg);
348:                        continue;
349:                    }
350:                    char[] chars = null;
351:                    int length;
352:                    try {
353:                        //                FileReader reader = new FileReader(template_file);
354:                        chars = new char[(int) template_file.length()];
355:                        FileInputStream stream = new FileInputStream(
356:                                template_file);
357:                        InputStreamReader reader = new InputStreamReader(
358:                                stream, "UTF-8");
359:                        length = reader.read(chars);
360:                    } catch (Exception noprob) {
361:                        log.error("Exception while attempting to " + msg);
362:                        if (log.isDebugEnabled())
363:                            log.debug(noprob);
364:                        continue;
365:                    }
366:
367:                    // Strip "_" from name to form link
368:                    boolean navbar = true;
369:                    String template_link = template_name;
370:                    if (template_name.startsWith("_")
371:                            && template_name.length() > 1) {
372:                        navbar = false;
373:                        template_link = template_link.substring(1);
374:                        log.debug("--- " + template_link);
375:                    }
376:
377:                    String decorator = "_decorator";
378:                    if ("_decorator".equals(template_name)) {
379:                        decorator = null;
380:                    }
381:
382:                    // construct ThemeTemplate representing this file
383:                    // a few restrictions for now:
384:                    //   - we only allow "velocity" for the template language
385:                    //   - decorator is always "_decorator" or null
386:                    //   - all theme templates are considered not hidden
387:                    theme_template = new ThemeTemplate(theme, theme_name + ":"
388:                            + template_name, template_name, template_name,
389:                            new String(chars, 0, length), template_link,
390:                            new Date(template_file.lastModified()), "velocity",
391:                            false, navbar, decorator);
392:
393:                    // add it to the theme
394:                    theme.setTemplate(template_name, theme_template);
395:                }
396:
397:                // use the last mod date of the theme dir
398:                theme.setLastModified(new Date(themedir.lastModified()));
399:
400:                // load up resources as well
401:                loadThemeResources(theme, themedir, themedir.getAbsolutePath());
402:
403:                return theme;
404:            }
405:
406:            /**
407:             * Convenience method for loading a theme's resource files.
408:             * This method works recursively to load from subdirectories.
409:             */
410:            private void loadThemeResources(Theme theme, File workPath,
411:                    String basePath) {
412:
413:                // now go through all static resources for this theme
414:                FilenameFilter resourceFilter = new FilenameFilter() {
415:                    public boolean accept(File dir, String name) {
416:                        return !name.endsWith(".vm");
417:                    }
418:                };
419:                File[] resources = workPath.listFiles(resourceFilter);
420:
421:                // go through each resource file and add it to the theme
422:                String resourcePath = null;
423:                File resourceFile = null;
424:                for (int i = 0; i < resources.length; i++) {
425:                    resourceFile = resources[i];
426:                    resourcePath = resourceFile.getAbsolutePath().substring(
427:                            basePath.length() + 1);
428:
429:                    log.debug("handling resource [" + resourcePath + "]");
430:
431:                    // Continue reading theme even if problem encountered with one file
432:                    if (!resourceFile.exists() || !resourceFile.canRead()) {
433:                        log.warn("Couldn't read theme resource file ["
434:                                + resourcePath + "]");
435:                        continue;
436:                    }
437:
438:                    // if its a directory, recurse
439:                    if (resourceFile.isDirectory()) {
440:                        log.debug("resource is a directory, recursing");
441:                        loadThemeResources(theme, resourceFile, basePath);
442:                    }
443:
444:                    // otherwise just add the File to the theme
445:                    theme.setResource(resourcePath, resourceFile);
446:                }
447:            }
448:
449:        }
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