implemented UI for find posts, debugged and tweaked the engine implementation

src/com/silverwrist/venice/servlets/FindPost.java

@@ -0,0 +1,113 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.servlets;
+
+import java.io.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import com.silverwrist.venice.core.*;
+import com.silverwrist.venice.except.*;
+import com.silverwrist.venice.servlets.format.*;
+
+public class FindPost extends VeniceServlet
+{
+  /*--------------------------------------------------------------------------------
+   * Overrides from class HttpServlet
+   *--------------------------------------------------------------------------------
+   */
+
+  public String getServletInfo()
+  {
+    String rc = "FindPost servlet - Searches for posts in communities, conferences, and/or topics\n"
+              + "Part of the Venice Web Communities System\n";
+    return rc;
+
+  } // end getServletInfo
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class VeniceServlet
+   *--------------------------------------------------------------------------------
+   */
+
+  protected VeniceContent doVeniceGet(HttpServletRequest request, VeniceEngine engine,
+				      UserContext user, RenderData rdat)
+    throws ServletException, IOException, VeniceServletResult
+  {
+    CommunityContext comm = getCommunityParameter(request,user,true,"top");
+    changeMenuCommunity(request,comm);
+    String locator = "sig=" + comm.getCommunityID();
+
+    ConferenceContext conf = getConferenceParameter(request,comm,false,"confops?" + locator);
+    TopicContext topic = null;
+    if (conf!=null)
+    { // find the topic parameter
+      locator += ("&conf=" + conf.getConfID());
+      topic = getTopicParameter(request,conf,false,"confdisp?" + locator);
+      if (topic!=null)
+	locator += ("&top=" + topic.getTopicNumber());
+
+    } // end if
+
+    setMyLocation(request,"findpost?" + locator);
+    return new FindPostData(comm,conf,topic);
+
+  } // end doVeniceGet
+
+  protected VeniceContent doVenicePost(HttpServletRequest request, VeniceEngine engine,
+				       UserContext user, RenderData rdat)
+    throws ServletException, IOException, VeniceServletResult
+  {
+    CommunityContext comm = getCommunityParameter(request,user,true,"top");
+    changeMenuCommunity(request,comm);
+    String locator = "sig=" + comm.getCommunityID();
+
+    ConferenceContext conf = getConferenceParameter(request,comm,false,"confops?" + locator);
+    TopicContext topic = null;
+    if (conf!=null)
+    { // find the topic parameter
+      locator += ("&conf=" + conf.getConfID());
+      topic = getTopicParameter(request,conf,false,"confdisp?" + locator);
+      if (topic!=null)
+	locator += ("&top=" + topic.getTopicNumber());
+
+    } // end if
+
+    setMyLocation(request,"findpost?" + locator);
+    FindPostData data = new FindPostData(comm,conf,topic);
+
+    try
+    { // attempt to configure the display
+      data.doSearch(request,engine);
+
+    } // end try
+    catch (AccessError ae)
+    { // error in find parameters
+      return new ErrorBox("Find Error",ae.getMessage(),"top");
+
+    } // end catch
+    catch (DataException de)
+    { // database error, man
+      return new ErrorBox("Database Error","Database error on find: " + de.getMessage(),"top");
+
+    } // end catch
+
+    return data;
+
+  } // end doVenicePost
+
+} // end class FindPost

src/com/silverwrist/venice/servlets/format/FindData.java

@@ -39,6 +39,7 @@ public class FindData implements JSPRender, SearchMode
   public static final int FD_COMMUNITIES = 0;
   public static final int FD_USERS = 1;
   public static final int FD_CATEGORIES = 2;
+  public static final int FD_POSTS = 3;
 
   // The titles and URLs of the header data
   private static Vector header_titles = null;
@@ -78,12 +79,14 @@ public class FindData implements JSPRender, SearchMode
       header_titles.add("Communities");
       header_titles.add("Users");
       header_titles.add("Categories");
+      header_titles.add("Posts");
       header_titles.trimToSize();
 
       header_urls = new Vector();
       header_urls.add("find?disp=" + String.valueOf(FD_COMMUNITIES));
       header_urls.add("find?disp=" + String.valueOf(FD_USERS));
       header_urls.add("find?disp=" + String.valueOf(FD_CATEGORIES));
+      header_urls.add("find?disp=" + String.valueOf(FD_POSTS));
       header_urls.trimToSize();
 
     } // end if
@@ -128,7 +131,7 @@ public class FindData implements JSPRender, SearchMode
 
   public static int getNumChoices()
   {
-    return FD_CATEGORIES + 1;
+    return FD_POSTS + 1;
 
   } // end getNumChoices
 
@@ -303,7 +306,8 @@ public class FindData implements JSPRender, SearchMode
 	break;
 
       case FD_CATEGORIES:
-	// no parameters to set here - there's no "field" for category search
+      case FD_POSTS:
+	// no parameters to set here - there's no "field" for category/post search
         break;
 
       default:
@@ -311,10 +315,13 @@ public class FindData implements JSPRender, SearchMode
 
     } // end switch
 
-    // Validate the search mode parameter.
-    mode = getParamInt(request,"mode",SEARCH_PREFIX);
-    if ((mode!=SEARCH_PREFIX) && (mode!=SEARCH_SUBSTRING) && (mode!=SEARCH_REGEXP))
-      throw new ValidationException("The search mode parameter is not valid.");
+    if (disp!=FD_POSTS)
+    { // Validate the search mode parameter.
+      mode = getParamInt(request,"mode",SEARCH_PREFIX);
+      if ((mode!=SEARCH_PREFIX) && (mode!=SEARCH_SUBSTRING) && (mode!=SEARCH_REGEXP))
+	throw new ValidationException("The search mode parameter is not valid.");
+
+    } // end if
 
     // Retrieve the search term parameter.
     term = request.getParameter("term");
@@ -379,6 +386,12 @@ public class FindData implements JSPRender, SearchMode
 	  find_count = user.getSearchCategoryCount(mode,term);
 	break;
 
+      case FD_POSTS:
+	results = user.searchPosts(term,offset,count);
+	if (find_count<0)
+	  find_count = user.getSearchPostCount(term);
+	break;
+
     } // end switch
 
   } // end loadPost

src/com/silverwrist/venice/servlets/format/FindPostData.java

@@ -0,0 +1,275 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.servlets.format;
+
+import java.io.Writer;
+import java.io.IOException;
+import java.util.*;
+import javax.servlet.*;
+import com.silverwrist.util.StringUtil;
+import com.silverwrist.venice.core.*;
+import com.silverwrist.venice.except.*;
+
+public class FindPostData implements JSPRender
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  // Attribute name for request attribute
+  protected static final String ATTR_NAME = "com.silverwrist.venice.content.FindPostData";
+
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private CommunityContext comm;
+  private ConferenceContext conf;
+  private TopicContext topic;
+  private String term = "";
+  private int offset = 0;
+  private int find_count = 0;
+  private List results = null;
+  private int max_results = 0;
+
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public FindPostData(CommunityContext comm, ConferenceContext conf, TopicContext topic)
+  {
+    this.comm = comm;
+    this.conf = conf;
+    this.topic = topic;
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Internal static functions
+   *--------------------------------------------------------------------------------
+   */
+
+  private static int getParamInt(ServletRequest request, String name, int default_val)
+  {
+    String str = request.getParameter(name);
+    if (str==null)
+      return -1;
+
+    try
+    { // parse the integer value
+      return Integer.parseInt(str);
+
+    } // end try
+    catch (NumberFormatException nfe)
+    { // in case of conversion error, fall through
+    } // end catch
+
+    return default_val;
+
+  } // end getParamInt
+
+  private static boolean isImageButtonClicked(ServletRequest request, String name)
+  {
+    String val = request.getParameter(name + ".x");
+    return (val!=null);
+
+  } // end isImageButtonClicked
+
+  /*--------------------------------------------------------------------------------
+   * External static functions
+   *--------------------------------------------------------------------------------
+   */
+
+  public static FindPostData retrieve(ServletRequest request)
+  {
+    return (FindPostData)(request.getAttribute(ATTR_NAME));
+
+  } // end retrieve
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface VeniceContent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String getPageTitle(RenderData rdat)
+  {
+    return "Find Posts";
+
+  } // end getPageTitle
+
+  public String getPageQID()
+  {
+    return null;
+
+  } // end getPageQID
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface JSPRender
+   *--------------------------------------------------------------------------------
+   */
+
+  public void store(ServletRequest request)
+  {
+    request.setAttribute(ATTR_NAME,this);
+
+  } // end store
+
+  public String getTargetJSPName()
+  {
+    return "findpost.jsp";
+
+  } // end getTargetJSPName
+
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  public final void doSearch(ServletRequest request, VeniceEngine engine) throws AccessError, DataException
+  {
+    max_results = engine.getStdNumSearchResults();
+
+    // Retrieve the search term parameter.
+    term = request.getParameter("term");
+    if (term==null)
+      term = "";
+
+    // Retrieve the offset and find count parameters.
+    offset = getParamInt(request,"ofs",0);
+    find_count = getParamInt(request,"fcount",-1);
+
+    // Adjust the search return offset based on the command button click.
+    if (isImageButtonClicked(request,"search"))
+      offset = 0;
+    else if (isImageButtonClicked(request,"previous"))
+    { // adjust the offset in the reverse direction
+      offset -= max_results;
+      if (offset<0)
+	offset = 0;
+
+    } // end else if
+    else if (isImageButtonClicked(request,"next"))
+      offset += max_results;  // go forwards instead
+    else
+      throw new InternalStateError("Unable to determine what action triggered the form.");
+
+    if (topic!=null)
+    { // search the topic
+      results = topic.searchPosts(term,offset,max_results);
+      if (find_count<0)
+	find_count = topic.getSearchPostCount(term);
+
+    } // end if
+    else if (conf!=null)
+    { // search the conference
+      results = conf.searchPosts(term,offset,max_results);
+      if (find_count<0)
+	find_count = conf.getSearchPostCount(term);
+
+    } // end else if
+    else
+    { // search the community
+      results = comm.searchPosts(term,offset,max_results);
+      if (find_count<0)
+	find_count = comm.getSearchPostCount(term);
+
+    } // end else
+
+  } // end doSearch
+
+  public final String getExtraParameters()
+  {
+    StringBuffer buf = new StringBuffer("<INPUT TYPE=\"HIDDEN\" NAME=\"sig\" VALUE=\"");
+    buf.append(comm.getCommunityID()).append("\">");
+    if (conf!=null)
+    { // append the conference number parameter
+      buf.append("\n<INPUT TYPE=\"HIDDEN\" NAME=\"conf\" VALUE=\"").append(conf.getConfID()).append("\">");
+      if (topic!=null)
+      { // append the topic number parameter
+	buf.append("\n<INPUT TYPE=\"HIDDEN\" NAME=\"top\" VALUE=\"").append(topic.getTopicNumber());
+	buf.append("\">");
+
+      } // end if
+
+    } // end if
+
+    return buf.toString();
+
+  } // end getExtraParameters
+
+  public final String getReturnLink(RenderData rdat)
+  {
+    if (topic!=null)
+      return "<A HREF=\"" + rdat.getEncodedServletPath("confdisp?sig=" + comm.getCommunityID()
+						       + "&conf=" + conf.getConfID() + "&top="
+						       + topic.getTopicNumber()) + "\">Return to Topic</A>";
+    else if (conf!=null)
+      return "<A HREF=\"" + rdat.getEncodedServletPath("confdisp?sig=" + comm.getCommunityID()
+						       + "&conf=" + conf.getConfID())
+	                  + "\">Return to Topic List</A>";
+    else
+      return "<A HREF=\"" + rdat.getEncodedServletPath("confops?sig=" + comm.getCommunityID())
+	                  + "\">Return to Topic List</A>";
+      
+  } // end getReturnLink
+
+  public final String getSubtitle()
+  {
+    if (topic!=null)
+      return "Topic: " + topic.getName();
+    else if (conf!=null)
+      return "Conference: " + conf.getName();
+    else
+      return "Community: " + comm.getName();
+
+  } // end getSubtitle
+
+  public final String getTerm()
+  {
+    return term;
+
+  } // end getTerm
+
+  public final int getOffset()
+  {
+    return offset;
+
+  } // end getOffset
+
+  public final int getFindCount()
+  {
+    return find_count;
+
+  } // end getFindCount
+
+  public final List getResults()
+  {
+    return results;
+
+  } // end getResults
+
+  public final int getMaxResults()
+  {
+    return max_results;
+
+  } // end getMaxResults
+
+} // end class FindPostData