package org.sourceforge.vlibrary.user.forms;
   
   import java.util.ArrayList;
   import java.util.List;
   import java.util.StringTokenizer;
   
   import javax.servlet.http.HttpServletRequest;
   
   import org.apache.struts.action.ActionErrors;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionMapping;
  import org.apache.struts.action.ActionMessage;
  import org.sourceforge.vlibrary.user.domain.Location;
  import org.sourceforge.vlibrary.user.domain.Subject;
  
  /**
   *
   * Form bean for the Book Search page.  This form has the following fields:
   * <ul>
   * <li><b>selector</b> - type of search ("None","Title","Author" or "Subject")
   * <li><b>title</b> - [REQUIRED if selector="Title"]
   * <li><b>authorLastName</b> - [REQUIRED if selector="Author"]
   * <li><b>subjects</b> - Subject(s) [COMPUTED if selector="Subject"]
   * <li><b>subjectString</b> - Subject(s) \n-separated
   *  [REQUIRED if selector="Subject"]
   * <li><b>queryType</b> - "And" or "Or" [REQUIRED if selector="Subject"]
   * <li><b>books<b> - List of books resulting from search [COMPUTED]
   * </ul>
   *
   * @version $Revision$ $Date$
   */
  
  public class BookSearchForm extends ActionForm {
      private static final long serialVersionUID = 0;
  
      private String selector = "None";
      private String title = null;
      private String authorLastName = null;
      private ArrayList<Subject> subjects = null;
      private ArrayList<Location> locations = null;
      private String queryType = "Or";
      private ArrayList<Subject> subjectList = null;
  
      public BookSearchForm() {
      }
  
      public String getAuthorLastName() {
          return authorLastName;
      }
  
      public void setAuthorLastName(String authorLastName) {
          this.authorLastName = authorLastName;
      }
  
      public String getQueryType() {
          return queryType;
      }
  
      public void setQueryType(String queryType) {
          this.queryType = queryType;
      }
  
      public String getSelector() {
          return selector;
      }
  
      public void setSelector(String selector) {
          this.selector = selector;
      }
  
      public ArrayList<Subject> getSubjects() {
          return subjects;
      }
  
      public void setSubjects(ArrayList<Subject> subjects) {
          this.subjects = subjects;
      }
  
      public String getSubjectString() {
          if (subjects == null) return null;
  
          StringBuffer buf = new StringBuffer();
          Subject su = null;
  
          for (int i=0;i<subjects.size();i++) {
              su = subjects.get(i);
              buf.append(su.getDescription());
              buf.append("\n");
          }
  
          return buf.toString();
      }
  
      public String getSubjectListString() {
          if (subjectList == null) return null;
          StringBuffer buf = new StringBuffer();
          Subject su = null;
  
          for (int i=0;i<subjectList.size();i++) {
             su = (Subject)subjectList.get(i);
             buf.append(su.getDescription());
             buf.append("\n");
         }
 
         return buf.toString();
     }
 
     /**
      * Takes String from Subjects text area and fills subjects ArrayList
      * with subject objects constructed from the descriptions in the
      * \n-delimited input string. <br>
      * <strong>nb: ID fields in subject objects will not be set </strong>.
      * @param inString String -- \n-delimited list of author full names
      */
     /** todo -- replace with generic function */
     public void setSubjectString(String inString) {
         StringTokenizer st = new StringTokenizer(inString,"\n");
         if (!st.hasMoreElements()) return;
         subjects = null;
         subjects = new ArrayList<Subject>();
         while (st.hasMoreElements()) {
             Subject su = new Subject(st.nextToken());
             subjects.add(su);
         }
     }
 
     public String getTitle() {
         return title;
     }
 
     public void setTitle(String title) {
         this.title = title;
     }
 
     /**
      * Validate the properties that have been set from this HTTP request,
      * and return an <code>ActionErrors</code> object that encapsulates any
      * validation errors that have been found.  If no errors are found, return
      * <code>null</code> or an <code>ActionErrors</code> object with no
      * recorded error messages.<br>
      *
      * Uses <code>LibraryMgr.subjectExists()</code> to validate subjects
      *
      * @param mapping The mapping used to select this instance
      * @param request The servlet request we are processing
      */
     public ActionErrors validate(ActionMapping mapping,
      HttpServletRequest request) {
 
         ActionErrors errors = new ActionErrors();
 
         if ( selector.equals("Title") &&
          ( title == null || title.length() < 1)) {
             errors.add("title", new ActionMessage("error.book.title.required"));
 
             return errors;
         }
 
         if ( selector.equals("Author") &&
          (authorLastName == null || authorLastName.length() < 1)) {
             errors.add("author", new ActionMessage("error.book.author.required"));
 
             return errors;
         }
 
         // If this is a subject search, make sure we have at least one subject
         if ( selector.equals("Subject") && subjects == null) {
             errors.add("subjects",
              new ActionMessage("error.book.search.subject.required"));
 
             return errors;
         }
 
         return errors;
     }
 
     /** Getter for property subjectList.
      * @return Value of property subjectList.
      */
     public ArrayList<Subject> getSubjectList() {
         return subjectList;
     }
 
     /** Setter for property subjectList.
      * @param subjectList New value of property subjectList.
      */
     public void setSubjectList(ArrayList<Subject> subjectList) {
         this.subjectList = subjectList;
     }
 
     public void setLocations(ArrayList<Location> locations) {
         this.locations = locations;
     }
 
     public ArrayList<Location> getLocations() {
         return locations;
     }
 }