// ----------------------------------------------------------------------------
// Zoom Search Engine 2.0 (7/10/2003)
//
// This file (search.js) is the JavaScript search front-end for client side
// searches using index files created by the Zoom Search Engine Indexer.
//
// email: zoom@wrensoft.com
// www: http://www.wrensoft.com
//
// Copyright (C) Wrensoft 2000-2003
//
// This script performs client-side searching with the index data file
// (zoom_index.js) generated by the Zoom Search Engine Indexer. It allows you
// to run searches on mediums such as CD-ROMs, or other local data, where a
// web server is not available.
//
// We recommend against using client-side searches for online websites because
// it requires the entire index data file to be downloaded onto the user's
// local machine. This can be very slow for large websites, and our server-side
// search scripts (search.php and search.asp) are far better suited for this.
// However, JavaScript is still an option for smaller websites in a limited
// hosting situation (eg: no php or asp)
// ----------------------------------------------------------------------------

// ----------------------------------------------------------------------------
// Settings (change if necessary)
// ----------------------------------------------------------------------------

// Highlight matched words in results
var Highlighting = 0;           // 0 = off, 1 = on
var HighlightColor = "#FFFF40"; // Highlight colour
var HighlightLimit = 1000;      // Max number of words matched before
                                // highlighting is disabled

// The options available in the dropdown menu for number of results
// per page
var PerPageOptions = new Array(10, 20, 50, 100);

var FormFormat = 2;    //0 = No search form (note that you must pass parameters to
                       //    the script directly from elsewhere on your website).
                       //1 = Basic search form
                       //2 = Advanced search form (with options)

var OutputStyle = 1;    //0 = Basic Style, Page Title, Score and URL
                        //1 = Descriptive Style, Match number, Page Title,
                        //    Page description, Score and URL

var ZoomInfo = 0;       //0 = Don't display Zoom info line at bottom of search
                        //1 = Display Zoom info line at bottom of search

var WordSplit = 1;      //0 = Only split input search phrase into words when a
                        //    Space character is found
                        //1 = Split input search phrase at Space ' ',
                        //    UnderScore '_' , Dash '-' and Plus '+' characters

// ----------------------------------------------------------------------------
// Helper Functions
// ----------------------------------------------------------------------------

// This function will return the value of a GET parameter
function getParam(paramName)
{
    paramStr = document.location.search;
    if (paramStr == "")
        return "";

    // remove '?' in front of paramStr
    if (paramStr.charAt(0) == "?")
        paramStr = paramStr.substring(1, paramStr.length);

    arg = (paramStr.split("&"));
    for (i=0; i < arg.length; i++) {
        arg_values = arg[i].split("=")
        if (unescape(arg_values[0]) == paramName) {
            if (self.decodeURIComponent) // check if decodeURIComponent() is defined
                ret = decodeURIComponent(arg_values[1]);
            else
                ret = unescape(arg_values[1]);  // IE 5.0 and older does not have decodeURI
            return ret;
        }
    }
    return;
}

// Compares the two values, used for sorting output results
// Results that match all search terms are put first, highest score
function SortCompare (a, b)
{
    if (a[2] < b[2]) return 1;
    else if (a[2] > b[2]) return -1;
    else if (a[1] < b[1]) return 1;
    else if (a[1] > b[1]) return -1;
    else return 0;
}

function pattern2regexp(pattern) {
    pattern = pattern.replace(/\./g, "\\.");
    pattern = pattern.replace(/\*/g, ".*");
    pattern = pattern.replace(/\?/g, ".?");
    return "^" + pattern + "$";
}

function HighlightDescription(line) {
    res = " " + line + " ";
    for (i = 0; i < matchwords_num; i++) {
        // replace with marker text, assumes [;:] and [:;] is not the search text...
        // can not use \\b due to IE's regexp bug with foreign diacritic characters
        // treated as non-word characters
        res = res.replace(new RegExp("([\\s\.\,\:]+)("+matchwords[i]+")([\\s\.\,\:]+)", "gi"), "$1[;:]$2[:;]$3");
    }
    // replace the marker text with the html text
    // this is to avoid finding previous <span>'ed text.
    res = res.replace(/\[;:\]/g, "<span style=\"background: " + HighlightColor + "\">");
    res = res.replace(/\[:;\]/g, "</span>");
    return res;
}

// ----------------------------------------------------------------------------
// Parameters initialisation (globals)
// ----------------------------------------------------------------------------

var query = getParam("zoom_query");
query = query.replace(/\+/g, " ");  // replace the '+' with spaces

var per_page = parseInt(getParam("zoom_per_page"));
if (isNaN(per_page)) per_page = 10;

var page = parseInt(getParam("zoom_page"));
if (isNaN(page)) page = 1;

var andq = parseInt(getParam("zoom_and"));
if (isNaN(andq)) andq = 0;

var cat = parseInt(getParam("zoom_cat"));
if (isNaN(cat)) cat = -1;   // search all categories

if (typeof(catnames) != "undefined" && typeof(catpages) != "undefined")
    UseCats = true;
else
    UseCats = false;

var searchWords = new Array();
var data = new Array();
var output = new Array();

if (Highlighting == 1) {
    var matchwords = new Array();
    var matchwords_num = 0;
}


// ----------------------------------------------------------------------------
// Main search function starts here
// ----------------------------------------------------------------------------

function ZoomSearch() {

    // Display the form
    if (FormFormat > 0) {
        document.writeln("<form name=\"suchformular\" method=\"GET\" action=\"" + document.location.href + "\">");

            document.writeln("<TABLE cellspacing=\"2\" cellpadding=\"2\" border=\"0\" align=\"left\" style=\"border-width:3px; border-style:ridge; border-color:#FF8000;\">");
              document.writeln("<TR>");
        document.writeln("<TD>");

        document.writeln("<TABLE align=\"center\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\">");
        document.writeln("<TR>");
        document.writeln("<TD><p class=\"smallwhite\"><p class=\"smallblackbold\"><b>suche nach/search for:<br>");
        document.writeln("<input type=\"text\" name=\"zoom_query\" size=\"30\" value=\"" + query + "\">");

                document.writeln("</p></TD>");

        document.writeln("<TD><IMG SRC=\"images/xspacer.gif\" WIDTH=\"5\" HEIGHT=\"10\" BORDER=\"0\"></TD>");
        document.writeln("<TD valign=\"bottom\"><input type=\"submit\" value=\"Start\" name=\"Button1\"></TD>");
        document.writeln("</TR>");

        document.writeln("</TABLE>");
                document.writeln("</TD>");
              document.writeln("</TR>");
                document.writeln("</TABLE>");

        if (FormFormat == 2) {
                        document.writeln("<BR><BR><BR><BR>");
                        document.writeln("<TABLE cellspacing=\"0\" cellpadding=\"0\" border=\"0\">");
                        document.writeln("<TR height=\"30\" valign=\"middle\">");
                        document.writeln("<TD>");

            if (andq == 0) {
                document.writeln("<input type=\"radio\" name=\"zoom_and\" value=\"0\" checked>");
                                document.writeln("</TD>");

                                document.writeln("<TD valign=\"middle\">");
                                document.writeln("Oder-Suche");
                                document.writeln("</TD>");

                                document.writeln("<TD>");
                                document.writeln("<IMG SRC=\"images/xspacer.gif\" WIDTH=\"5\" HEIGHT=\"10\" BORDER=\"0\">");
                                document.writeln("</TD>");

                                document.writeln("<TD>");
                document.writeln("<input type=\"radio\" name=\"zoom_and\" value=\"1\">");
                                document.writeln("</TD>");
                                document.writeln("<TD valign=\"middle\">");
                                document.writeln("Und-Suche");
                                document.writeln("</TD>");
            } else {
                document.writeln("<input type=\"radio\" name=\"zoom_and\" value=\"0\">");
                                document.writeln("</TD>");

                                document.writeln("<TD>");
                                document.writeln("Oder-Suche");
                                document.writeln("</TD>");

                                document.writeln("<TD>");
                                document.writeln("<IMG SRC=\"images/xspacer.gif\" WIDTH=\"5\" HEIGHT=\"10\" BORDER=\"0\">");
                                document.writeln("</TD>");

                                document.writeln("<TD>");
                document.writeln("<input type=\"radio\" name=\"zoom_and\" value=\"1\" checked>");
                                document.writeln("</TD>");
                                document.writeln("<TD>");
                                document.writeln("Und-Suche");
                                document.writeln("</TD>");
            }
                        document.writeln("</TD>");
                        document.writeln("</TR>");
                        document.writeln("</TABLE>");
        }

        document.writeln("</form>");
    }

        document.writeln("");
	
		window.document.suchformular.zoom_query.focus();
	
        // give up early if no search words provided
    if (query.length == 0) {
        //document.writeln("No search query entered.<br>");
        if (ZoomInfo == 1)
            document.writeln("<center><small>Search powered by <a href=\"http://www.wrensoft.com/zoom\"><b>Zoom Search Engine</b></a></small><br></center>");
        return;
    }

    if (WordSplit == 1)
        query = query.replace(/[\+\_]/g, " "); // replace '+', '_' with spaces.

    // split search phrase into words
    searchWords = query.split(" "); // split by spaces.

    document.write("<br>"+"Suchergebnis für: \"" + "<b>"+ query +"</b>"+ "\""+"<br>");
    if (UseCats) {
        if (cat == -1)
            document.writeln(" in allen Kategorien");
        else
            document.writeln(" in Kategorie \"" + catnames[cat] + "\"");
    }
    document.writeln("</h2>");

    numwords = searchWords.length;
    kw_ptr = 0;
    outputline = 0;
    usewildcards = 0;
    ipage = 0;

    for (sw = 0; sw < numwords; sw++) {

        re = new RegExp(pattern2regexp(searchWords[sw]), "gi");

        for (kw_ptr = 0; kw_ptr < keywords.length; kw_ptr++) {
            data = keywords[kw_ptr].split(",");

            //match_result = searchWords[sw] == data[0];
            match_result = data[0].search(re);

            if (match_result != -1) {
                // keyword found, include it in the output list

                if (Highlighting == 1) {
                    // Add to matched words list
                    // Check if its already in the list
                    for (i = 0; i < matchwords.length && matchwords[i] != data[0]; i++);
                    if (i == matchwords.length) {
                        // not in list
                        matchwords_num = matchwords.push(data[0]);
                        if (matchwords.length >= HighlightLimit) {
                            Highlighting = 0;
                            document.writeln("<small>Too many words to highlight. Highlighting disabled.</small><br><br>");
                        }
                    }
                }

                for (kw = 1; kw < data.length; kw += 2) {
                    // check if page is already in output list
                    pageexists = 0;
                    ipage = data[kw];
                    for (ol = 0; ol < outputline; ol++) {

                        if (output[ol][0] == ipage) {
                            // page is already in output list so add to count and extra
                            if (output[ol][1] > 10000) {
                                // take it easy if its too big (to prevent huge scores)
                                output[ol][1] += 1;
                            } else {
                                output[ol][1] += parseInt(data[kw+1]);  // add in score
                                output[ol][1] *= 2;             // double score as we have two words matching
                            }
                            output[ol][2] += 1;                 // increase word match count
                            pageexists = 1;
                        }
                    }
                    if (pageexists == 0) {
                        // new page to add to list
                        // create 3 fields for each output
                        output[outputline] = new Array(0,0,0);
                        // now fill in the values for each field
                        output[outputline][0] = ipage;      // page index
                        output[outputline][1] = parseInt(data[kw+1]);   // score
                        output[outputline][2] = 1;          // single word match only
                        outputline++;
                    }

                }
                // if (useWildCards == 0)
                //break;    // this search word was found, so skip to next
            }
            // return to start of keywords list...
        }
    }

    // Get number of pages matched
    matches = outputline;

    // Sort results in order of score, use "SortCompare" function
    if (matches > 1)
        output.sort(SortCompare);

    // Count number of output lines that match ALL search terms
    oline = 0;
    fullmatches = 0;

    if (numwords > 1 || (UseCats && cat != -1)) {
        origmatches = matches;
        while (oline < origmatches) {
            ResFiltered = false;
            if (UseCats && cat != -1) {
                //Using cats and not doing an "all cats" search
                if (catpages[output[oline][0]] != cat) {
                    matches = matches - 1;
                    ResFiltered = true;
                }
            }
            if (ResFiltered == false) {
                if (output[oline][2] == numwords) {
                    fullmatches++;
                } else if (andq == 1) {
                    matches = matches - 1
                    ResFiltered = true;
                }
            }
            oline++;
        }
        //if (andq == 1)
            //matches = fullmatches;
    }

    //Display search result information
    document.writeln("<small>");
    if (matches == 1)
        document.writeln("<i>1 Treffer gefunden.</i><br><br>");
    else if (matches == 0)
        document.writeln("<i>Keine Treffer gefunden.</i><br><br>");
    else if (numwords > 1 && andq == 0) {
        //OR
        SomeTermMatches = matches - fullmatches;
        document.writeln("<i>" + fullmatches + " Seiten gefunden, die alle Suchbegriffe enthalten. ");
        if (SomeTermMatches > 0)
            document.writeln(SomeTermMatches + " Seiten gefunden, die einige Suchbegriffe enthalten.");
        document.writeln("</i><br><br>");
    }
    else if (numwords > 1 && andq == 1) //AND
        document.writeln("<i>" + fullmatches + " Seiten gefunden, die alle Suchbegriffe enthalten.</i><br><br>");
    else
        document.writeln("<i>" + matches + " Treffer gefunden.</i><br><br>");

    document.writeln("</small>\n");

    // number of pages of results
    num_pages = Math.ceil(matches / per_page);
    if (num_pages > 1)
        document.writeln("<br>" + num_pages + " Trefferseiten.<br>\n");

    // determine current line of result from the output array
    if (page == 1) {
        arrayline = 0;
        out_counter = 0;
        outStartsAt = 0;
    } else {
        //arrayline = ((page - 1) * per_page);
        arrayline = 0;
        out_counter = 0;
        outStartsAt = ((page - 1) * per_page);
    }

    // the last result to show on this page
    result_limit = outStartsAt + per_page;


    // display the results
    while (arrayline < output.length && out_counter < result_limit) {

        if ((andq == 1) && (numwords > 1) && (output[arrayline][2] < numwords)) {
            arrayline++;
            continue;
        }

        if (UseCats && cat != -1) {
            if (catpages[output[arrayline][0]] != cat) {
                arrayline++;
                continue;
            }
        }

        out_counter++;
        if (out_counter <= outStartsAt)
        {
            arrayline++;
            continue;
        }

        ipage = output[arrayline][0];
        score = output[arrayline][1];
        if (OutputStyle == 0) {
            // basic style
            document.writeln("<p>Page: <a href=\"" + urls[ipage] + "\">" + titles[ipage] + "</a><br>\n");
            document.writeln("Score: " + score + "&nbsp;&nbsp;<small><i>URL:" + urls[ipage] + "</i></small></p>\n");
        } else {
            // descriptive style
            document.writeln("<p><b>" + (out_counter) + ".</b>&nbsp;<a href=\"" + urls[ipage] + "\"><b>" + titles[ipage] + "</b></a>");
            if (UseCats) {
                catindex = catpages[ipage];
                document.writeln(" <font color=\"#999999\">[" + catnames[catindex] + "]</font>");
            }
            document.writeln("<br>");

            if (Highlighting == 1)
                document.writeln(HighlightDescription(descriptions[ipage]));
            else
                document.writeln(descriptions[ipage]);
            document.writeln("...<br>\n");
            document.writeln("<font color=\"#999999\"><small><i>Übereinstimmende Treffer: " + output[arrayline][2] + " Gewichtung: " + score + "&nbsp;&nbsp;URL: " + urls[ipage] + "</i></small></font></p>\n");
        }
        arrayline++;
    }

    // Show links to other result pages
    if (num_pages > 1) {
        // 10 results to the left of the current page
        start_range = page - 10;
        if (start_range < 1)
            start_range = 1;

        // 10 to the right
        end_range = page + 10;
        if (end_range > num_pages)
            end_range = num_pages;

        document.writeln("<p>Trefferseite: ");
        if (page > 1)
            document.writeln("<a href=\"" + document.location.pathname + "?zoom_query=" + query + "&zoom_page=" + (page-1) + "&zoom_per_page=" + per_page + "&zoom_cat=" + cat + "&zoom_and=" + andq + "\">&lt;&lt; Zurück</a> ");

        for (i = start_range; i <= end_range; i++) {
            if (i == page) {
                document.writeln(page + " ");
            } else {
                document.writeln("<a href=\"" + document.location.pathname + "?zoom_query=" + query + "&zoom_page=" + i + "&zoom_per_page=" + per_page + "&zoom_cat=" + cat + "&zoom_and=" + andq + "\">" + i + "</a> ");
            }
        }

        if (page != num_pages)
            document.writeln("<a href=\"" + document.location.pathname + "?zoom_query=" + query + "&zoom_page=" + (page+1) + "&zoom_per_page=" + per_page + "&zoom_cat=" + cat + "&zoom_and=" + andq + "\">Weiter &gt;&gt;</a> ");
    }

    document.writeln("<br><br>");

    if (ZoomInfo == 1)
        document.writeln("<center><small>Search powered by <a href=\"http://www.wrensoft.com/zoom\"><b>Zoom Search Engine</b></a></small><br></center>");

}