/**********************************************************************
 *
 * vlistbrowserclass.cpp -- 
 * Copyright (C) 1999  The New Zealand Digital Library Project
 *
 * A component of the Greenstone digital library software
 * from the New Zealand Digital Library Project at the
 * University of Waikato, New Zealand.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *********************************************************************/

#include "vlistbrowserclass.h"
#include <assert.h>
#include "OIDtools.h"
#include "browsetools.h"

vlistbrowserclass::vlistbrowserclass () {
}

vlistbrowserclass::~vlistbrowserclass () {
}

// returns the name that specifies the browserclass type
text_t vlistbrowserclass::get_browser_name () {
  return "VList";
}

browserclass* vlistbrowserclass::clone()
{
  vlistbrowserclass* browser = new vlistbrowserclass();
  if (browser != NULL) {
#ifdef GSDL_USE_BY_BOOK_MACROS
    browser->m_oByBookMacros.Copy(m_oByBookMacros);
#endif
  }
  return browser;
}

void vlistbrowserclass::load_metadata_defaults (text_tset &metadata) {
  metadata.insert ("haschildren");
  metadata.insert ("doctype");
}

text_t vlistbrowserclass::get_default_formatstring () {
  return "<td valign=top>[link][icon][/link]</td>"
    "<td valign=top>[srclink][srcicon][/srclink]</td>"
    "<td valign=top>[highlight]{Or}{[Title],Untitled}[/highlight]"
    "{If}{[Source],<br><i>([Source])</i>}</td>";
}

int vlistbrowserclass::output_section_group (ResultDocInfo_t &section, cgiargsclass &args,
					     const text_t &collection, int colnumber, 
					     format_t *formatlistptr, bool use_table, 
					     text_tset &/*metadata*/, bool &/*getParents*/, 
					     recptproto * collectproto, displayclass &disp, 
					     outconvertclass &outconvert, ostream &textout, 
					     ostream& logout) {

  text_t link, icon;

  text_t collink = collection;
  if (!collink.empty()) collink = "&c=" + collink;

  get_link_icon (section, args, collink, link, icon);
  bool highlight = false;
  if (!args["d"].empty()) {
    if (args["d"] == section.OID) highlight = true;
  } else 
    if (args["cl"] == section.OID) highlight = true;


  if (use_table || colnumber > 0) {
    textout << outconvert << "<table><tr valign=top>";
    // get tab size
    text_t tab; int itab;
    disp.expandstring (displayclass::defaultpackage, "_tabwidth_", tab);
    itab = tab.getint();
    if (colnumber > 0) textout << outconvert << disp 
			       << "<td><img src=\"_httpimg_/space.gif\" width=" 
			       << (itab*colnumber) << "></td>";
  }

  text_tmap options;
  options["link"] = link;
  options["icon"] = icon;
  if (highlight) options["highlight"] = "1";
  else options["highlight"] = "0";
  options["DocImage"] = get_cover_image();
  textout << outconvert << disp 
	  << get_formatted_string (collection, collectproto, 
				   section, disp, formatlistptr, 
				   options, logout);
  
  if (use_table  || colnumber > 0) textout << outconvert << "</tr></table>\n";

  return 1;
}

int vlistbrowserclass::output_section_group (FilterResponse_t &sections, cgiargsclass &args,
					     const text_t &collection, int colnumber, 
					     format_t *formatlistptr, bool use_table, 
					     text_tset &/*metadata*/, bool &/*getParents*/, 
					     recptproto * collectproto, displayclass &disp, 
					     outconvertclass &outconvert, ostream &textout, 
					     ostream& logout) {

  text_t link, icon;
  text_t &arg_d = args["d"];
  text_t &arg_cl = args["cl"];

  text_t collink = collection;
  if (!collink.empty()) collink = "&c=" + collink;

  if (colnumber > 0) {
    textout << outconvert << "<table><tr valign=top>";
    // get tab size
    text_t tab; int itab;
    disp.expandstring (displayclass::defaultpackage, "_tabwidth_", tab);
    itab = tab.getint();
    if (colnumber > 0) textout << outconvert << disp 
			       << "<td><img src=\"_httpimg_/space.gif\" width=" 
			       << (itab*colnumber) << "></td>";
    textout << outconvert << "<td>";
  }
  if (use_table) textout << outconvert << "<table>\n";

  ResultDocInfo_tarray::iterator thissection = sections.docInfo.begin();
  ResultDocInfo_tarray::iterator endsection = sections.docInfo.end();

  // ** here lies Alan's hack to get 4 results per table row
  int item = 0, perline;; // set perline to 1 normally
  text_t fstring;

  text_tmap options;
  options["link"] = link;
  options["icon"] = icon;
  options["highlight"] = "0";
  options["DocImage"] = get_cover_image();
  
  if ( thissection != endsection ) { // only if there are results (else corrupts display)
    fstring = get_formatted_string (collection, collectproto, *thissection,
                                    disp, formatlistptr, options, logout);
    // if format string
    // has <td><t (e.g. <td><table>) then
    // we assume it is an image and put it in 4 columns
    if (fstring[5] == 't') 
      perline = 4;
    else
      perline = 1;
  }

  while (thissection != endsection) {
    ++item;
    get_link_icon (*thissection, args, collink, link, icon);
    bool highlight = false;
    if (!arg_d.empty()) {
      if (arg_d == (*thissection).OID) highlight = true;
    } else 
      if (arg_cl == (*thissection).OID) highlight = true;

    if ((item == 1 && use_table) || colnumber > 0 )
      textout << outconvert << "<tr valign=top>\n";

    options["link"] = link;
    options["icon"] = icon;
    if (highlight) options["highlight"] = "1";
    else options["highlight"] = "0";
    options["DocImage"] = get_cover_image();
    
    textout << outconvert << disp 
	    << " " << get_formatted_string (collection, collectproto, *thissection, disp,
					    formatlistptr, options, logout);

    if ((item >= perline && use_table) || colnumber > 0) {
      textout << outconvert << "\n</tr>";
      item = 0;
    }
    textout << outconvert << "\n";
    ++thissection;
  }

  if (use_table) textout << outconvert << "</table>\n";
  if (colnumber > 0) textout << outconvert << "</td></tr></table>\n";

  return 1;
}


// get_link_icon attempts to work out what type of icon should be displayed for
// the given section and what it should link to.
// [modification to allow default document detach settings -- kjdon]
void vlistbrowserclass::get_link_icon (ResultDocInfo_t &section, cgiargsclass &args,
				       const text_t &collink, text_t &link, text_t &icon) {

  link = "<a href=\"_httpdocument_" + collink;
  text_t link_end = "\">";
  text_t detach_link_end = "&x=1\" target=\\_blank>"; // to detach the link, and x=1 signifies it is a detached page
  icon = "_document:icontext_";

  text_t doctype;
  int haschildren = 0;

  if (section.metadata.count("haschildren")>0)
    haschildren = section.metadata["haschildren"].values[0].getint();
  if (section.metadata.count("doctype")>0)
    doctype = section.metadata["doctype"].values[0];

  text_t &arg_d = args["d"];
  text_t &arg_cl = args["cl"];

  if (args["a"] == "q") {
    // query results list
    link += "&cl=search&d=" + section.OID;
    
    if (args["xx"] == "1") {
      link += detach_link_end;
    } else {
      link += link_end;
    }
    if ((is_top (section.OID)) && (haschildren == 1)) icon = "_document:iconclosedbook_";
    else if (haschildren == 1) icon = "_document:iconclosedfolder_";
    
  } else if (!arg_d.empty()) {
    // we are in a document - none of the links should be detach links
    if (is_top(section.OID)) {
      // we link back to the originating page eg search page or classifier page
      icon = "_document:iconopenbook_";
      if (arg_cl == "search") { 
	link = "<a href=\"_httpquery_\">";
      }
      else link += "&cl=" + arg_cl + "\">";
      
    } else if (haschildren == 1) {
      if ((args["gc"] == "1") || 
	  (is_child_of (section.OID, arg_d)) ||
	  (section.OID == arg_d)) {
	icon = "_document:iconopenfolder_";
	link += "&cl=" + arg_cl + "&d=" + section.OID + ".pr\">";
      } else {
	icon = "_document:iconclosedfolder_";
	link += "&cl=" + arg_cl + "&d=" + section.OID + "\">";
      }
    } else {
      if (args["gt"] == "0") {
	link += "&cl=" + arg_cl + "&d=" + section.OID + "\">";
      } else {
	link += "&cl=" + arg_cl + "&d=" + section.OID + "#" + section.OID + "\">";
      }
    }
    
  } else {
    // classification level - links to docs may be detaching
    if (haschildren == 1) {
      if (doctype == "classify") {
	if ((args["gc"] == "1") || 
	    (is_child_of (section.OID, arg_cl)) || 
	    (section.OID == arg_cl)) {
	  icon = "_document:iconopenbookshelf_";
	  link += "&cl=" + section.OID + ".pr\">";
	} else {
	  icon = "_document:iconclosedbookshelf_";
	  link += "&cl=" + section.OID + "\">";
	}
      } else {
    
	icon = "_document:iconclosedbook_";
	link += "&cl=" + arg_cl + "&d=" + section.OID;
	if (args["xx"] == "1") {
	  link +=  detach_link_end;
	} else {
	  link += link_end;
	}
	
      }
    } else {
      if (doctype == "classify") link = "";
      else {
	link += "&cl=" + arg_cl + "&d=" + section.OID;
	if (args["xx"] == "1") {
	  link +=  detach_link_end;
	} else {
	  link += link_end;
	}
      }
    }
  }
  
}