source: trunk/src/org/expeditee/agents/SearchAgent.java@ 1510

/**
 *    SearchAgent.java
 *    Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.expeditee.agents;

import java.util.Collection;

import org.expeditee.gui.DisplayController;
import org.expeditee.gui.Frame;
import org.expeditee.gui.FrameCreator;
import org.expeditee.gui.FrameIO;
import org.expeditee.io.Conversion;
import org.expeditee.items.Item;
import org.expeditee.items.Text;

public abstract class SearchAgent extends DefaultAgent {

        private static final String DEFAULT_RESULTS_FRAMESET = "SearchResults";

        public static final int SURROGATE_LENGTH = 50;

        protected FrameCreator _results;

        protected String _pattern;

        protected String _replacementString;

        protected String _startName;

        public SearchAgent(String searchText) {
                if (searchText != null)
                        _pattern = searchText.toLowerCase();
        }

        @Override
        public boolean initialise(Frame frame, Item item) {
                String pattern = item.getText();
                String resultFrameset = null;

                // TODO use a results frame specified on the profile frame
                if (item.getLink() == null) {
                        resultFrameset = DEFAULT_RESULTS_FRAMESET;
                } else {
                        resultFrameset = Conversion.getFramesetName(item.getAbsoluteLink(),
                                        false);
                }
                return initialise(frame, item, getSearchDescription(frame), resultFrameset,
                                null, pattern);
        }

        /**
         * @param frame
         * @return
         */
        protected String getSearchDescription(Frame frame) {
                return frame.getFramesetName();
        }

        /**
         * 
         * @param frame
         * @param item
         * @param startName
         * @param resultsFrameset
         * @param replacementString
         * @param pattern
         *            is ignored if the pattern has already been set earlier.
         * @return
         */
        public boolean initialise(Frame frame, Item item, String startName,
                        String resultsFrameset, String replacementString, String pattern) {
                // TODO: Put the init params in the constructor!! Dont want to be
                // setting _pattern in two places!

                if (_pattern == null)
                        _pattern = pattern.toLowerCase();
                _replacementString = replacementString;
                _startName = startName;

                // Create a frame to put the results on with the search query
                // and type as the title
                String title = this.getClass().getSimpleName() + " [" + startName
                                + "]"+getResultsTitleSuffix();
                _results = new FrameCreator(resultsFrameset, FrameIO.FRAME_PATH, title,
                                FrameCreator.ExistingFramesetOptions.AppendSegregatedFrames, true, null);
                // Set the frame to be displayed after running the agent
                _end = _results.getFirstFrame();

                return super.initialise(frame, item);
        }

        protected String getResultsTitleSuffix() {
                return " [" + _pattern + "]";
        }

        public String getResultsFrameName() {
                return _results.getName();
        }

        public static boolean searchItem(Text itemToSearch, String pattern,
                        String replacementString) {
                String searchStr = itemToSearch.getText().toLowerCase();
                boolean bFound = searchStr.contains(pattern.toLowerCase());
                // If it is a find and replace... then replace with the replacement
                // string
                if (bFound && replacementString != null) {
                        itemToSearch.setText(searchStr.replaceAll(pattern,
                                        replacementString));
                }
                return bFound;
        }

        public static boolean searchFrame(FrameCreator results, String frameName, String pattern, String replacementString)
        {
                boolean wasXrayMode = DisplayController.isXRayMode();
                if (!wasXrayMode) DisplayController.ToggleXRayMode();
                Frame frameToSearch = FrameIO.LoadFrame(frameName);
                if (!wasXrayMode) DisplayController.ToggleXRayMode();
                if (frameToSearch == null)
                        return false;
                for (Text itemToSearch : frameToSearch.getTextItems()) {
                        // Search for the item and add it to the results page if
                        // it is found
                        if (searchItem(itemToSearch, pattern, replacementString)) {
                                // Add a linked item to the results frame
                                results.addText(frameName, null, frameName, null, false);
                        }
                }
                DisplayController.requestRefresh(true);
                FrameIO.SaveFrame(frameToSearch, false);
                return true;
        }
        
        protected int addResults(String frameName, Collection<String> found) {
                return addResults(frameName, frameName, found);
        }
        
        /**
         * @param frameNumber
         * @param frameName
         * @param found
         * @return
         */
        protected int addResults(String frameNumber, String frameName, Collection<String> found) {
                int size = found == null ? 0 : found.size();
                // If the frame exists
                if (found != null)
                        _frameCount++;
                if (size > 0) {
                        // String repeats = size > 1? ("("+ size+ ")") : "";
                        for (String s : found) {
                                StringBuffer surrogate = new StringBuffer();
                                surrogate.append("[").append(frameNumber).append("] ");
                                if (s.length() > SearchAgent.SURROGATE_LENGTH)
                                        surrogate.append(
                                                        s.substring(0, SearchAgent.SURROGATE_LENGTH - 3))
                                                        .append("...");
                                else {
                                        surrogate.append(s);
                                }

                                _results.addText(surrogate.toString(), null,
                                                frameName, null, false);
                                DisplayController.requestRefresh(true);
                        }
                }
                return size;
        }
}