/*

Copyright (c) 2009, Yahoo! Inc. All rights reserved.

Code licensed under the BSD License:

http://developer.yahoo.net/yui/license.txt

version: 3.0.0

build: 1549

*/

YUI.add('dump', function(Y) {

/**

 * Returns a simple string representation of the object or array.

 * Other types of objects will be returned unprocessed.  Arrays

 * are expected to be indexed.  Use object notation for

 * associative arrays.

 *

 * If included, the dump method is added to the YUI instance.

 *

 * @module dump

 */

    var L=Y.Lang, OBJ='{...}', FUN='f(){...}', COMMA=', ', ARROW=' => ',

    /**

     * The following methods are added to the YUI instance

     * @class YUI~dump

     */

    /**

     * Returns a simple string representation of the object or array.

     * Other types of objects will be returned unprocessed.  Arrays

     * are expected to be indexed.  Use object notation for

     * associative arrays.

     *

     * @TODO dumping a window is causing an unhandled exception in

     * FireFox.

     *

     * This method is in the 'dump' module, which is not bundled with

     * the core YUI object

     *

     * @method dump

     * @param o {object} The object to dump

     * @param d {int} How deep to recurse child objects, default 3

     * @return {string} the dump result

     */

    dump = function(o, d) {

        var i, len, s = [], type = L.type(o);

        // Cast non-objects to string

        // Skip dates because the std toString is what we want

        // Skip HTMLElement-like objects because trying to dump 

        // an element will cause an unhandled exception in FF 2.x

        if (!L.isObject(o)) {

            return o + "";

        } else if (type == "date") {

            return o;

        } else if (o.nodeType && o.tagName) {

            return o.tagName + '#' + o.id;

        } else if (o.document && o.navigator) {

            return 'window';

        } else if (o.location && o.body) {

            return 'document';

        } else if (type == "function") {

            return FUN;

        }

        // dig into child objects the depth specifed. Default 3

        d = (L.isNumber(d)) ? d : 3;

        // arrays [1, 2, 3]

        if (type == "array") {

            s.push("[");

            for (i=0,len=o.length;i<len;i=i+1) {

                if (L.isObject(o[i])) {

                    s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);

                } else {

                    s.push(o[i]);

                }

                s.push(COMMA);

            }

            if (s.length > 1) {

                s.pop();

            }

            s.push("]");

        // regexp /foo/

        } else if (type == "regexp") {

            s.push(o.toString());

        // objects {k1 => v1, k2 => v2}

        } else {

            s.push("{");

            for (i in o) {

                if (o.hasOwnProperty(i)) {

                    try {

                        s.push(i + ARROW);

                        if (L.isObject(o[i])) {

                            s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);

                        } else {

                            s.push(o[i]);

                        }

                        s.push(COMMA);

                    } catch(e) {

                        s.push('Error: ' + e.message);

                    }

                }

            }

            if (s.length > 1) {

                s.pop();

            }

            s.push("}");

        }

        return s.join("");

    };

    Y.dump = dump;

    L.dump = dump;

}, '3.0.0' );