// Bookmarks_p.java 
// -----------------------
// part of YACY
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// This File is contributed by Alexander Schier
//
// $LastChangedDate: 2008-01-22 12:51:43 +0100 (Di, 22 Jan 2008) $
// $LastChangedRevision: 4352 $
// $LastChangedBy: orbiter $
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.

// You must compile this file with
// javac -classpath .:../Classes Blacklist_p.java
// if the shell's current path is HTROOT

import java.io.File;
import java.net.MalformedURLException;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Set;
import java.util.TreeSet;

import java.lang.Math;

import de.anomic.data.bookmarksDB;
import de.anomic.data.listManager;
import de.anomic.data.userDB;
import de.anomic.data.bookmarksDB.Tag;
import de.anomic.data.bookmarksDB.tagComparator;
import de.anomic.http.httpHeader;
import de.anomic.http.httpc;
import de.anomic.index.indexURLEntry;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.plasmaSnippetCache;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.server.serverDate;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.server.logging.serverLog;
import de.anomic.yacy.yacyCore;
import de.anomic.yacy.yacyNewsPool;
import de.anomic.yacy.yacyNewsRecord;
import de.anomic.yacy.yacyURL;


public class Bookmarks {

	private static serverObjects prop;
	private static plasmaSwitchboard switchboard;
	private static userDB.Entry user;
	private static boolean isAdmin;	

	final static int SORT_ALPHA = 1;
	final static int SORT_SIZE = 2;
	final static int SHOW_ALL = -1;
	
    public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {

    	int max_count = 10;
    	int start=0;
    	String tagName = "";
    	String username="";
    	
    	prop = new serverObjects();
    	switchboard = (plasmaSwitchboard) env;
    	user = switchboard.userDB.getUser(header);   
    	isAdmin=(switchboard.verifyAuthentication(header, true) || user!= null && user.hasRight(userDB.Entry.BOOKMARK_RIGHT));
    
    	// set user name
    	if(user != null) username=user.getUserName();
    	else if(isAdmin) username="admin";
    	prop.put("user", username);
    	
    	//redirect to userpage
    	/*
    	if(username!="" &&(post == null || !post.containsKey("user") && !post.containsKey("mode")))
        prop.put("LOCATION", "/Bookmarks.html?user="+username);
    	*/
    
    	// set peer address
    	final String address = yacyCore.seedDB.mySeed().getPublicAddress();
    	prop.put("address", address);
    
    	//defaultvalues
    	if(isAdmin) {
    		prop.put("mode", "1");
                prop.put("admin", "1");
        } else {
    		prop.put("mode", "0");
                prop.put("admin", "0");
        }
    	prop.put("mode_edit", "0");
    	prop.put("mode_title", "");
    	prop.put("mode_description", "");
    	prop.put("mode_url", "");
    	prop.put("mode_tags", "");
    	prop.put("mode_public", "1"); //1=is public
    	prop.put("mode_feed", "0"); //no newsfeed
    	
    	if(post != null){        
    		if(!isAdmin){
    			if(post.containsKey("login")){
    				prop.put("AUTHENTICATE","admin log-in");
    			}
    		}else if(post.containsKey("mode")){
    			String mode=(String) post.get("mode");            
    			if(mode.equals("add")){
    				prop.put("mode", "2");
    			}else if(mode.equals("importxml")){
    				prop.put("mode", "3");
    			}else if(mode.equals("importbookmarks")){
    				prop.put("mode", "4");
    			}
    		}else if(post.containsKey("add")){ //add an Entry
    			String url=(String) post.get("url");
    			String title=(String) post.get("title");
    			String description=(String) post.get("description");
    			String tagsString = (String)post.get("tags");
    			if(tagsString.equals("")){
    				tagsString="unsorted"; //default tag
    			}
                        
                        // get rid of heading, trailing and double commas since they are useless
                        while (tagsString.startsWith(",")) {
                            tagsString = tagsString.substring(1);
                        }
                        while (tagsString.endsWith(",")) {
                            tagsString = tagsString.substring(0,tagsString.length() -1);
                        }
                        while(tagsString.contains(",,")){
                            tagsString = tagsString.replaceAll(",,", ",");
                        }
                        // get rid of double and trailing slashes
                        while(tagsString.endsWith("/")){
                            tagsString = tagsString.substring(0, tagsString.length() -1);
                        }
                        while(tagsString.contains("/,")){
                            tagsString = tagsString.replaceAll("/,", ",");
                        }
                        while(tagsString.contains("//")){
                            tagsString = tagsString.replaceAll("//", "/");
                        }
                        
    			Set tags=listManager.string2set(tagsString.replaceAll(",\\s+", ",")); // space characters following a comma are removed
        
    			bookmarksDB.Bookmark bookmark = switchboard.bookmarksDB.createBookmark(url, username);
    			if(bookmark != null){
    				bookmark.setProperty(bookmarksDB.Bookmark.BOOKMARK_TITLE, title);
    				bookmark.setProperty(bookmarksDB.Bookmark.BOOKMARK_DESCRIPTION, description);
    				if(user!=null){ 
    					bookmark.setOwner(user.getUserName());
    				}
    				if(((String) post.get("public")).equals("public")){
    					bookmark.setPublic(true);
    					publishNews(url, title, description, tagsString);
    				}else{
    					bookmark.setPublic(false);
    				}
    				if(post.containsKey("feed") && ((String) post.get("feed")).equals("feed")){
    					bookmark.setFeed(true);
    				}else{
    					bookmark.setFeed(false);
    				}
    				bookmark.setTags(tags, true);
    				switchboard.bookmarksDB.saveBookmark(bookmark);
    			}else{
    				//ERROR
    			}
    		}else if(post.containsKey("edit")){
    			String urlHash=(String) post.get("edit");
    			prop.put("mode", "2");
    			if (urlHash.length() == 0) {
    				prop.put("mode_edit", "0"); // create mode
    				prop.putHTML("mode_title", (String) post.get("title"));
    				prop.putHTML("mode_description", (String) post.get("description"));
    				prop.put("mode_url", (String) post.get("url"));
    				prop.putHTML("mode_tags", (String) post.get("tags"));
    				prop.put("mode_public", "0");
    				prop.put("mode_feed", "0");
    			} else {
                    bookmarksDB.Bookmark bookmark = switchboard.bookmarksDB.getBookmark(urlHash);
                    if (bookmark == null) {
                        // try to get the bookmark from the LURL database
                        indexURLEntry urlentry = switchboard.wordIndex.loadedURL.load(urlHash, null, 0);
                        plasmaParserDocument document = null;
                        if (urlentry != null) {
                            indexURLEntry.Components comp = urlentry.comp();
                            document = plasmaSnippetCache.retrieveDocument(comp.url(), true, 5000, true);
                            prop.put("mode_edit", "0"); // create mode
                            prop.put("mode_url", comp.url().toNormalform(false, true));
                            prop.putHTML("mode_title", comp.title());
                            prop.putHTML("mode_description", (document == null) ? comp.title(): document.dc_title());
                            prop.putHTML("mode_author", comp.author());
                            prop.putHTML("mode_tags", (document == null) ? comp.tags() : document.dc_subject(','));
                            prop.put("mode_public", "0");
                            prop.put("mode_feed", "0"); //TODO: check if it IS a feed
                        }
                        if (document != null) document.close();
                    } else {
                        // get from the bookmark database
                        prop.put("mode_edit", "1"); // edit mode
                        prop.putHTML("mode_title", bookmark.getTitle());
                        prop.putHTML("mode_description", bookmark.getDescription());
                        prop.put("mode_url", bookmark.getUrl());
                        prop.putHTML("mode_tags", bookmark.getTagsString());
                        if (bookmark.getPublic()) {
                            prop.put("mode_public", "1");
                        } else {
                            prop.put("mode_public", "0");
                        }
                        if (bookmark.getFeed()) {
                            prop.put("mode_feed", "1");
                        } else {
                            prop.put("mode_feed", "0");
                        }
                    }
                }
    		}else if(post.containsKey("bookmarksfile")){
    			boolean isPublic=false;
    			if(((String) post.get("public")).equals("public")){
    				isPublic=true;
    			}
    			String tags=(String) post.get("tags");
    			if(tags.equals("")){
    				tags="unsorted";
    			}
    			try {
    				File file=new File((String)post.get("bookmarksfile"));
    				switchboard.bookmarksDB.importFromBookmarks(new yacyURL(file) , post.get("bookmarksfile$file"), tags, isPublic);
    			} catch (MalformedURLException e) {}
    		}else if(post.containsKey("xmlfile")){
    			boolean isPublic=false;
    			if(((String) post.get("public")).equals("public")){
    				isPublic=true;
    			}
    			switchboard.bookmarksDB.importFromXML(post.get("xmlfile$file"), isPublic);
    		}else if(post.containsKey("delete")){
    			String urlHash=(String) post.get("delete");
    			switchboard.bookmarksDB.removeBookmark(urlHash);
    		}
    		if(post.containsKey("tag")){
    			tagName=(String) post.get("tag");
    		}
    		if(post.containsKey("start")){
    			start=Integer.parseInt((String) post.get("start"));
    		}
    		if(post.containsKey("num")){
    			max_count=Integer.parseInt((String) post.get("num"));
    		}
    	} // END if(post != null)
    	
    	
    	//-----------------------
    	// create tag list
    	//-----------------------
    	printTagList("taglist", tagName, SORT_SIZE, 25, false);
    	printTagList("optlist", tagName, SORT_ALPHA, SHOW_ALL, true);
    	       	
    	//-----------------------
    	// create bookmark list
    	//-----------------------
    	int count=0;
        bookmarksDB.Tag tag;
    	Iterator it = null;    	
       	bookmarksDB.Bookmark bookmark;
       	Set<String> tags;
       	Iterator<String> tagsIt;
       	int tagCount;
       	
       	prop.put("num-bookmarks", switchboard.bookmarksDB.bookmarksSize());
       	
       	count=0;
       	if(!tagName.equals("")){
       		prop.put("selected", "");
       		it=switchboard.bookmarksDB.getBookmarksIterator(tagName, isAdmin);
       	}else{
       		prop.put("selected", " selected=\"selected\"");
       		it=switchboard.bookmarksDB.getBookmarksIterator(isAdmin);
       	}
       	
       	//skip the first entries (display next page)
       	count=0;
       	while(count < start && it.hasNext()){
       		it.next();
       		count++;
       	}
       	
       	count=0;
       	while(count<max_count && it.hasNext()){
       		bookmark=switchboard.bookmarksDB.getBookmark((String)it.next());
       		if(bookmark!=null){
       			if(bookmark.getFeed() && isAdmin)
       				prop.put("bookmarks_"+count+"_link", "/FeedReader_p.html?url="+bookmark.getUrl());
       			else
       				prop.put("bookmarks_"+count+"_link",bookmark.getUrl());
       			prop.putHTML("bookmarks_"+count+"_title", bookmark.getTitle());
       			prop.putHTML("bookmarks_"+count+"_description", bookmark.getDescription());
       			prop.put("bookmarks_"+count+"_date", serverDate.formatISO8601(new Date(bookmark.getTimeStamp())));
       			prop.put("bookmarks_"+count+"_rfc822date", httpc.dateString(new Date(bookmark.getTimeStamp())));
       			prop.put("bookmarks_"+count+"_public", (bookmark.getPublic() ? "1" : "0"));
            
       			//List Tags.
       			tags=bookmark.getTags();
       			tagsIt=tags.iterator();
       			tagCount=0;
       			while (tagsIt.hasNext()) {            	
       				String tname = tagsIt.next();
       				if ((!tname.startsWith("/")) && (!tname.equals(""))) {
       					prop.put("bookmarks_"+count+"_tags_"+tagCount+"_tag", tname);
       					tagCount++;
       				}
       			}
       			prop.put("bookmarks_"+count+"_tags", tagCount);
       			prop.put("bookmarks_"+count+"_hash", bookmark.getUrlHash());
       			count++;
       		}
       	}
       	prop.putHTML("tag", tagName);
       	prop.put("start", start);
       	if(it.hasNext()){
       		prop.put("next-page", "1");
       		prop.put("next-page_start", start+max_count);
       		prop.putHTML("next-page_tag", tagName);
       		prop.put("next-page_num", max_count);
       	}
       	if(start >= max_count){
       		start=start-max_count;
       		if(start <0){
       			start=0;
       		}
       		prop.put("prev-page", "1");
       		prop.put("prev-page_start", start);
       		prop.putHTML("prev-page_tag", tagName);
       		prop.put("prev-page_num", max_count);
       	}
       	prop.put("bookmarks", count);
    
    
    	//-----------------------
    	// create folder list
    	//-----------------------
      
       	Set<String> folders = new TreeSet<String>();
       	String path = "";
       	
       	it=switchboard.bookmarksDB.getTagIterator(isAdmin);       	
       	while(it.hasNext()){
       		tag=(Tag) it.next();
       		if (tag.getFriendlyName().startsWith("/")) {
       			path = tag.getFriendlyName();
                        
                        // eliminate trailing and double slashes
                        while(path.endsWith("/")){
                            path = path.substring(0, path.length() -1);
                        }
                        while(path.contains("//")){
                            path = path.replaceAll("//", "/");
                        }
                        
       			while(path.length() > 0){
       				folders.add(path);
       				path = path.replaceAll("(/.[^/]*$)", "");
       				serverLog.logInfo("BOOKMARKS", "Path: "+path+" added to folder list.\n");
       			}       			
       		}
       	}
       	
       	folders.add("\uffff");
       	it = folders.iterator(); 
  
       	count = 0;
       	count = recurseFolders(it,"/",0,true,"");
       	prop.put("folderlist", count);
       	
    
       	return prop;    // return from serverObjects respond()
    }    
    
    private static void printTagList(String id, String tagName, int comp, int max, boolean opt){    	
    	int count=0;
        bookmarksDB.Tag tag;
    	Iterator it = null;
    	
        if (tagName.equals("")) {
        	it = switchboard.bookmarksDB.getTagIterator(isAdmin, comp, max);
        } else {
        	it = switchboard.bookmarksDB.getTagIterator(tagName, isAdmin, comp, max);
        }
       	while(it.hasNext()){
       		tag=(Tag) it.next();
       		if ((!tag.getTagName().startsWith("/")) && (!tag.getTagName().equals(""))) {
       			prop.putHTML(id+"_"+count+"_name", tag.getFriendlyName());
       			prop.putHTML(id+"_"+count+"_tag", tag.getTagName());
       			prop.put(id+"_"+count+"_num", tag.size());
       			if (opt){
       				if(tagName.equals(tag.getFriendlyName())){
       					prop.put(id+"_"+count+"_selected", " selected=\"selected\"");
       				} else {
       					prop.put(id+"_"+count+"_selected", "");
       				}
       			} else {
       				// font-size is pseudo-rounded to 2 decimals
       				prop.put(id+"_"+count+"_size", Math.round((1.1+Math.log(tag.size())/4)*100)/100.);
       			}
       			count++;
       		}
       	}
       	prop.put(id, count);    	
    }
    
    private static int recurseFolders(Iterator it, String root, int count, boolean next, String prev){
    	String fn="";    	
    	bookmarksDB.Bookmark bookmark;
   	
    	if(next) fn = it.next().toString();    		
    	else fn = prev;

    	if(fn.equals("\uffff")) {    		
    		int i = prev.replaceAll("[^/]","").length();
    		while(i>0){
    			prop.put("folderlist_"+count+"_folder", "</ul></li>");
    			count++;
    			i--;
    		}    		
    		return count;
    	}
   
    	if(fn.startsWith(root)){
    		prop.put("folderlist_"+count+"_folder", "<li>"+fn.replaceFirst(root+"/*","")+"<ul class=\"folder\">");
    		count++;    
    		Iterator bit=switchboard.bookmarksDB.getBookmarksIterator(fn, isAdmin);
    		while(bit.hasNext()){
    			bookmark=switchboard.bookmarksDB.getBookmark((String)bit.next());
    			prop.put("folderlist_"+count+"_folder", "<li><a href=\""+bookmark.getUrl()+"\">"+ bookmark.getTitle()+"</a></li>");
    			count++;
    		}    	
    		if(it.hasNext()){
    			count = recurseFolders(it, fn, count, true, fn);
    		}
    	} else {		
    		prop.put("folderlist_"+count+"_folder", "</ul></li>");        		
    		count++;
    		root = root.replaceAll("(/.[^/]*$)", ""); 		
    		if(root.equals("")) root = "/";    		
    		count = recurseFolders(it, root, count, false, fn);
    	} 
    	return count;
    }    

    private static void publishNews(String url, String title, String description, String tagsString) {
    	// create a news message
    	HashMap map = new HashMap();
    	map.put("url", url.replace(',', '|'));
    	map.put("title", title.replace(',', ' '));
    	map.put("description", description.replace(',', ' '));
    	map.put("tags", tagsString.replace(',', ' '));
    	yacyCore.newsPool.publishMyNews(yacyNewsRecord.newRecord(yacyNewsPool.CATEGORY_BOOKMARK_ADD, map));
    }

}