JSONParser = function() {}

JSONParser.Parse = function(root) {
	return JSONParser.parseDocument(root);
}

// ================================================================
//  every child/children into array
JSONParser.setOutputArrayAll = function () {
    this.setOutputArray( true );
}
//  a child into scalar, children into array
JSONParser.setOutputArrayAuto = function () {
    this.setOutputArray( null );
}
//  every child/children into scalar (first sibiling only)
JSONParser.setOutputArrayNever = function () {
    this.setOutputArray( false );
}
//  specified child/children into array, other child/children into scalar
JSONParser.setOutputArrayElements = function ( list ) {
    this.setOutputArray( list );
}
//  specify how to treate child/children into scalar/array
JSONParser.setOutputArray = function ( mode ) {
    if ( typeof(mode) == "string" ) {
        mode = [ mode ];                // string into array
    }
    if ( mode && typeof(mode) == "object" ) {
        if ( mode.length < 0 ) {
            mode = false;               // false when array == [] 
        } else {
            var hash = {};
            for( var i=0; i<mode.length; i++ ) {
                hash[mode[i]] = true;
            }
            mode = hash;                // array into hashed array
            if ( mode["*"] ) {
                mode = true;            // true when includes "*"
            }
        } 
    } 
    this.usearray = mode;
}

// ================================================================
//  convert from DOM root node to JavaScript Object 
//  method: parseElement( rootElement )

JSONParser.parseDocument = function ( root ) {
    // debug.print( "parseDocument: "+root );
    if ( ! root ) return;

    var ret = this.parseElement( root );            // parse root node
    // debug.print( "parsed: "+ret );

    if ( this.usearray == true ) {                  // always into array
        ret = [ ret ];
    } else if ( this.usearray == false ) {          // always into scalar
        //
    } else if ( this.usearray == null ) {           // automatic
        //
    } else if ( this.usearray[root.nodeName] ) {    // specified tag
        ret = [ ret ];
    }

    var json = {};
    json[root.nodeName] = ret;                      // root nodeName
    return json;
};

// ================================================================
//  convert from DOM Element to JavaScript Object 
//  method: parseElement( element )

JSONParser.parseElement = function ( elem ) {
    // debug.print( "nodeType: "+JKL.ParseXML.MAP_NODETYPE[elem.nodeType]+" <"+elem.nodeName+">" );

    //  COMMENT_NODE

    if ( elem.nodeType == 7 ) {
        return;
    }

    //  TEXT_NODE CDATA_SECTION_NODE

    if ( elem.nodeType == 3 || elem.nodeType == 4 ) {
        // var bool = elem.nodeValue.match( /[^\u0000-\u0020]/ );
        var bool = elem.nodeValue.match( /[^\x00-\x20]/ ); // for Safari
        if ( bool == null ) return;     // ignore white spaces
        // debug.print( "TEXT_NODE: "+elem.nodeValue.length+ " "+bool );
        return elem.nodeValue;
    }

    var retval;
    var cnt = {};

    //  parse attributes

    if ( elem.attributes && elem.attributes.length ) {
        retval = {};
        for ( var i=0; i<elem.attributes.length; i++ ) {
            var key = elem.attributes[i].nodeName;
            if ( typeof(key) != "string" ) continue;
            var val = elem.attributes[i].nodeValue;
            if ( ! val ) continue;
            if ( typeof(cnt[key]) == "undefined" ) cnt[key] = 0;
            cnt[key] ++;
            this.addNode( retval, key, cnt[key], val );
        }
    }

    //  parse child nodes (recursive)

    if ( elem.childNodes && elem.childNodes.length ) {
        var textonly = true;
        if ( retval ) textonly = false;        // some attributes exists
        for ( var i=0; i<elem.childNodes.length && textonly; i++ ) {
            var ntype = elem.childNodes[i].nodeType;
            if ( ntype == 3 || ntype == 4 ) continue;
            textonly = false;
        }
        if ( textonly ) {
            if ( ! retval ) retval = "";
            for ( var i=0; i<elem.childNodes.length; i++ ) {
                retval += elem.childNodes[i].nodeValue;
            }
        } else {
            if ( ! retval ) retval = {};
            for ( var i=0; i<elem.childNodes.length; i++ ) {
                var key = elem.childNodes[i].nodeName;
                if ( typeof(key) != "string" ) continue;
                var val = this.parseElement( elem.childNodes[i] );
                if ( ! val ) continue;
                if ( typeof(cnt[key]) == "undefined" ) cnt[key] = 0;
                cnt[key] ++;
                this.addNode( retval, key, cnt[key], val );
            }
        }
    }
    return retval;
};

// ================================================================
//  method: addNode( hash, key, count, value )

JSONParser.addNode = function ( hash, key, cnts, val ) {
//alert(key + ' - ' + val);
    if ( this.usearray == true ) {              // into array
        if ( cnts == 1 ) hash[key] = [];
        hash[key][hash[key].length] = val;      // push
    } else if ( this.usearray == false ) {      // into scalar
        if ( cnts == 1 ) hash[key] = val;       // only 1st sibling
    } else if ( this.usearray == null ) {
        if ( cnts == 1 ) {                      // 1st sibling
            hash[key] = val;
        } else if ( cnts == 2 ) {               // 2nd sibling
            hash[key] = [ hash[key], val ];
        } else {                                // 3rd sibling and more
            hash[key][hash[key].length] = val;
        }
    } else if ( this.usearray[key] ) {
        if ( cnts == 1 ) hash[key] = [];
        hash[key][hash[key].length] = val;      // push
    } else {
        if ( cnts == 1 ) hash[key] = val;       // only 1st sibling
    }
};