/***
|''Name''|TiddlySpaceCloneCommand|
|''Version''|0.5.7|
|''Description''|provides a toolbar command for cloning external tiddlers|
|''Status''|stable|
|''Source''|http://github.com/TiddlySpace/tiddlyspace/raw/master/src/plugins/TiddlySpaceCloneCommand.js|
|''Requires''|TiddlySpaceConfig TiddlySpaceFilters|
!Code
***/
//{{{
(function($) {

var cmd = config.commands;
var tiddlyspace = config.extensions.tiddlyspace;

var fieldsCache = {};

cmd.cloneTiddler = {
	text: cmd.editTiddler.text,
	tooltip: "Create a copy of this tiddler in the current space",
	errorMsg: "Error publishing %0: %1",

	isEnabled: function(tiddler) {
		return !config.filterHelpers.is.local(tiddler) && !readOnly;
	},
	handler: function(ev, src, title) {
		var tiddler = store.getTiddler(title);
		if(tiddler) {
			fieldsCache[title] = $.extend({}, tiddler.fields);
			tiddler.fields["server.workspace"] = tiddlyspace.getCurrentWorkspace("private");
			tiddler.fields["server.permissions"] = "read, write, create"; // no delete
			delete tiddler.fields["server.page.revision"];
			delete tiddler.fields["server.title"];
			delete tiddler.fields["server.etag"];
			// special handling for pseudo-shadow tiddlers
			if(tiddlyspace.coreBags.contains(tiddler.fields["server.bag"])) {
				tiddler.tags.remove("excludeLists");
			}
		} else { // ensure workspace is the current space
			var el = story.findContainingTiddler(src);
			el = $(el);
			var fields = el.attr("tiddlyfields");
			if(fields) { // inherited via TiddlyLink
				fields = fields.decodeHashMap();
				fields["server.workspace"] = config.
					defaultCustomFields["server.workspace"];
			} else {
				fields = config.defaultCustomFields;
			}
			fields = String.encodeHashMap(fields);
			el.attr("tiddlyfields", fields);
		}
		cmd.editTiddler.handler.apply(this, arguments);
		if(tiddler) {
			tiddler.fields["server.permissions"] += ", delete";
		}
		return false;
	}
};

cmd.editTiddler.isEnabled = function(tiddler) {
	return !cmd.cloneTiddler.isEnabled.apply(this, arguments);
};

// hijack cancelTiddler to restore original fields
var _cancelHandler = cmd.cancelTiddler.handler;
cmd.cancelTiddler.handler = function(ev, src, title) {
	var tiddler = store.getTiddler(title);
	if(tiddler) {
		tiddler.fields = fieldsCache[title] || tiddler.fields;
		delete fieldsCache[title];
	}
	return _cancelHandler.apply(this, arguments);
};

// hijack saveTiddler to clear unused fields stash
var _saveHandler = cmd.saveTiddler.handler;
cmd.saveTiddler.handler =  function(ev, src, title) {
	delete fieldsCache[title];
	return _saveHandler.apply(this, arguments);
};

})(jQuery);
//}}}