/*
 * low-level BOOKMARK and HISTORY handling
 * 
 * these commands try to be generic and don't use any GUI handling code
 * for higher-level functions look into commands.js
 */

function getProperty( aInput, aArc, DS )
{
    var node;
    node = DS.GetTarget( aInput, aArc, true );
    if( node instanceof Components.interfaces.nsIRDFResource ) {
        return node.Value;
    }
    if( node instanceof Components.interfaces.nsIRDFLiteral ) {
        return node.Value;
    }
    return "";
}

function addBookmark(title, uri)
{
    folder = RDF.GetResource("NC:BookmarksRoot");
    var rSource = BookmarksUtils.createBookmark(title, uri, null, title);
    var selection = BookmarksUtils.getSelectionFromResource(rSource);
    var target = BookmarksUtils.getTargetFromFolder(folder);
    BookmarksUtils.insertAndCheckSelection("newbookmark", selection, target);

    //also update bookmark cache
    g_bookmarks.unshift([uri, title]);
}

/* no idea what it does, it Just Works (TM)
 *
 * returns number of deleted bookmarks
 */
function deleteBookmark(url)
{ 
    var deleted = 0;

    // gNC_NS for trunk, NC_NS for 1.X 
    try {var pNC_NS; pNC_NS = gNC_NS;} catch (err) { pNC_NS = NC_NS;} 
    if(! BMSVC || ! BMDS || ! RDF || ! pNC_NS ) return null; 
    if ( !url) return null; // just in case 

    var curfolder = RDF.GetResource("NC:BookmarksRoot");
    var urlArc = RDF.GetResource(pNC_NS+"URL"); 
    var urlLiteral = RDF.GetLiteral(url);
    if (BMDS.hasArcIn(urlLiteral, urlArc)) { 
        var bmResources, bmResource, title, uri, type, ptype; 
        bmResources = BMSVC.GetSources(urlArc, urlLiteral, true); 
        while (bmResources.hasMoreElements()) { 
            bmResource = bmResources.getNext(); 
            type = BookmarksUtils.resolveType(bmResource); 
            if (type != "ImmutableBookmark") { 
                ptype = BookmarksUtils.resolveType(BMSVC.getParent(bmResource)); 
//              alert(type);
//              if ( type == "Folder")  // store the current folder
//                  curfolder = bmResource;
                if ( (type == "Bookmark" || type == "IEFavorite") &&  ptype != "Livemark") { 
                    title = BookmarksUtils.getProperty(bmResource, pNC_NS+"Name"); 
                    uri = BookmarksUtils.getProperty(bmResource, pNC_NS+"URL"); 

                    if (uri == url)
                    {
                        RDFC.Init(BMDS, BMSVC.getParent(bmResource));
                        RDFC.RemoveElement(bmResource, true);
                        deleted++;
                    }
                } 
            } 
        } 
    } 

    // also update bookmark cache, if we removed at least one bookmark
    if(deleted > 0)
        bookmarks_loaded = false;

    return deleted; 
}

/* call the function like this:
   var res = new Object();
   parseBookmarkString("-t tag1,tag2 -T title http://www.orf.at", res);
   res.tags is an array of tags
   res.title is the title or "" if no one was given
   res.url is the url as a string

   returns false, if parsing failed
*/
function parseBookmarkString(str, res)
{
    res.tags = [];
    res.title = null;
    res.url = null;

    var re_title = /^\s*((-t|--title)\s+(\w+|\".*\"))(.*)/;
    var re_tags = /^\s*((-T|--tags)\s+((\w+)(,\w+)*))(.*)/;
    var re_url = /^\s*(\".+\"|\S+)(.*)/;

    var match_tags = null;
    var match_title = null;
    var match_url = null;

    while(!str.match(/^\s*$/))
    {
        /* first check for --tags */
        match_tags = str.match(re_tags);
        if(match_tags != null)
        {
            str = match_tags[match_tags.length-1]; // the last captured parenthesis is the rest of the string
            tags = match_tags[3].split(",");
            res.tags = res.tags.concat(tags);
        }
        else /* then for --titles */
        {

            match_title = str.match(re_title);
            if(match_title != null)
            {
                // only one title allowed
                if (res.title != null)
                    return false;

                str = match_title[match_title.length-1]; // the last captured parenthesis is the rest of the string
                title = match_title[3];
                if(title.charAt(0) == '"')
                    title = title.substring(1,title.length-1);
                res.title = title;
            }
            else /* at last check for an url */
            {
                match_url = str.match(re_url);
                if (match_url != null)
                {
                    // only one url allowed
                    if (res.url != null)
                        return false;

                    str = match_url[match_url.length-1]; // the last captured parenthesis is the rest of the string
                    url = match_url[1];
                    if(url.charAt(0) == '"')
                        url = url.substring(1,url.length-1);
                    res.url = url;
                }
                else return false; // no url, tag or title found but still text left, abort
            }
        }
    }
    
    return true;
}


function Bookmarks()
{
    const search_service = Components.classes["@mozilla.org/browser/search-service;1"].
                           getService(Components.interfaces.nsIBrowserSearchService);
    
    /* also ensures that each search engine has a vimperator-friendly alias */
    this.getSearchEngines = function()
    {
        var search_engines = [];
        var firefox_engines = search_service.getVisibleEngines({ });
        for(var i in firefox_engines)
        {
            if (!firefox_engines[i].alias || !firefox_engines[i].alias.match(/^[a-z0-9_]+$/))
            {
                var alias = firefox_engines[i].name.replace(/^\W*(\w+).*/, "$1").toLowerCase();
                firefox_engines[i].alias = alias;
            }
            search_engines.push([firefox_engines[i].alias, firefox_engines[i].description]);
        }

        return search_engines;
    }

    // FIXME: for now g_keywords is generated by get_bookmarks_completion, WILL HAVE TO CHANGE
    // format of returned array:
    // [keyword, helptext, url]
    this.getKeywords = function()
    {
        return g_keywords;
    }

    // xxx: probably remove these functions
    // this.getDefaultEngine = function()
    // {
    //     return search_service.currentEngine;
    // }
    // this.setDefaultEngine = function(alias)
    // {
    //     var engine = search_service.getEngineByAlias(alias);
    //     if(engine)
    //         search_service.currentEngine = engine;
    //     else
    //         echoerr("Error: Search engine with alias '" + alias + "' does not exist");
    // }
    // this.getEngine = function(alias)
    // {
    //     var engine = search_service.getEngineByAlias(alias);
    //     return engine;
    // }

    // if the engine name is null, it uses the default search engine
    // returns a url for the search string
    this.getSearchURL = function(text, engine_name)
    {
        var url = null;
        if(!engine_name || engine_name == "")
            engine_name = get_pref("defsearch", "google");

        // first checks the search engines for a match
        var engine = search_service.getEngineByAlias(engine_name);
        if(engine)
        {
            if(text)
                url = engine.getSubmission(text, null).uri.spec;
            else
                url = engine.searchForm;
        }
        else // check for keyword urls
        {
            for (var i in g_keywords)
            {
                if(g_keywords[i][0] == engine_name)
                {
                    if (text == null)
                        text = "";
                    url = g_keywords[i][2].replace(/%s/g, encodeURIComponent(text));
                    break;
                }
            }
        }

        // if we came here, the engine_name is neither 
        return url;
    }
    logMessage("Bookmarks initialized.");
}

var bookmarks = new Bookmarks(); // FIXME, must it really be here? doesn't work in vimperator.js
// vim: set fdm=marker sw=4 ts=4 et: