Source Code Cross Referenced for WeblogEntryPlugin.java in  » Wiki-Engine » JSPWiki » com » ecyrd » jspwiki » plugin » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Wiki Engine » JSPWiki » com.ecyrd.jspwiki.plugin 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* 
002:            JSPWiki - a JSP-based WikiWiki clone.
003:
004:            Copyright (C) 2002 Janne Jalkanen (Janne.Jalkanen@iki.fi)
005:
006:            This program is free software; you can redistribute it and/or modify
007:            it under the terms of the GNU Lesser General Public License as published by
008:            the Free Software Foundation; either version 2.1 of the License, or
009:            (at your option) any later version.
010:
011:            This program is distributed in the hope that it will be useful,
012:            but WITHOUT ANY WARRANTY; without even the implied warranty of
013:            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:            GNU Lesser General Public License for more details.
015:
016:            You should have received a copy of the GNU Lesser General Public License
017:            along with this program; if not, write to the Free Software
018:            Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         */
020:        package com.ecyrd.jspwiki.plugin;
021:
022:        import com.ecyrd.jspwiki.*;
023:        import com.ecyrd.jspwiki.providers.ProviderException;
024:        import org.apache.log4j.Logger;
025:
026:        import java.text.SimpleDateFormat;
027:        import java.util.*;
028:
029:        /**
030:         *  Builds a simple weblog.
031:         *
032:         *  @since 1.9.21
033:         */
034:        public class WeblogEntryPlugin implements  WikiPlugin {
035:            private static Logger log = Logger
036:                    .getLogger(WeblogEntryPlugin.class);
037:
038:            public static final int MAX_BLOG_ENTRIES = 10000; // Just a precaution.
039:
040:            public static final String PARAM_ENTRYTEXT = "entrytext";
041:            /** 
042:             * Optional parameter: page that actually contains the blog.
043:             * This lets us provide a "new entry" link for a blog page 
044:             * somewhere else than on the page itself.
045:             */
046:            // "page" for uniform naming with WeblogPlugin...
047:            public static final String PARAM_BLOGNAME = "page";
048:
049:            public String getNewEntryPage(WikiEngine engine, String blogName)
050:                    throws ProviderException {
051:                SimpleDateFormat fmt = new SimpleDateFormat(
052:                        WeblogPlugin.DEFAULT_DATEFORMAT);
053:                String today = fmt.format(new Date());
054:
055:                int entryNum = findFreeEntry(engine.getPageManager(), blogName,
056:                        today);
057:
058:                String blogPage = WeblogPlugin.makeEntryPage(blogName, today,
059:                        "" + entryNum);
060:
061:                return blogPage;
062:            }
063:
064:            public String execute(WikiContext context, Map params)
065:                    throws PluginException {
066:                ResourceBundle rb = context
067:                        .getBundle(WikiPlugin.CORE_PLUGINS_RESOURCEBUNDLE);
068:
069:                String weblogName = (String) params.get(PARAM_BLOGNAME);
070:                if (weblogName == null) {
071:                    weblogName = context.getPage().getName();
072:                }
073:                WikiEngine engine = context.getEngine();
074:
075:                StringBuffer sb = new StringBuffer();
076:
077:                String entryText = (String) params.get(PARAM_ENTRYTEXT);
078:                if (entryText == null)
079:                    entryText = rb.getString("weblogentryplugin.newentry");
080:
081:                String url = context.getURL(WikiContext.NONE,
082:                        "NewBlogEntry.jsp", "page="
083:                                + engine.encodeName(weblogName));
084:
085:                sb.append("<a href=\"" + url + "\">" + entryText + "</a>");
086:
087:                return sb.toString();
088:            }
089:
090:            private int findFreeEntry(PageManager mgr, String baseName,
091:                    String date) throws ProviderException {
092:                Collection everyone = mgr.getAllPages();
093:                int max = 0;
094:
095:                String startString = WeblogPlugin.makeEntryPage(baseName, date,
096:                        "");
097:
098:                for (Iterator i = everyone.iterator(); i.hasNext();) {
099:                    WikiPage p = (WikiPage) i.next();
100:
101:                    if (p.getName().startsWith(startString)) {
102:                        try {
103:                            String probableId = p.getName().substring(
104:                                    startString.length());
105:
106:                            int id = Integer.parseInt(probableId);
107:
108:                            if (id > max) {
109:                                max = id;
110:                            }
111:                        } catch (NumberFormatException e) {
112:                            log.debug("Was not a log entry: " + p.getName());
113:                        }
114:                    }
115:                }
116:
117:                //
118:                //  Find the first page that has no page lock.
119:                //
120:                int idx = max + 1;
121:
122:                while (idx < MAX_BLOG_ENTRIES) {
123:                    WikiPage page = new WikiPage(mgr.getEngine(), WeblogPlugin
124:                            .makeEntryPage(baseName, date, Integer
125:                                    .toString(idx)));
126:                    PageLock lock = mgr.getCurrentLock(page);
127:
128:                    if (lock == null) {
129:                        break;
130:                    }
131:
132:                    idx++;
133:                }
134:
135:                return idx;
136:            }
137:
138:        }
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