export = {}; -- create a new export object

-- return label

function export:label()

	return "Toonz";

end

-- return category

function export:category()

	return "2D";

end

-- return argument list 

function export:options()

	groups = {};

	for a,actor in magpie.getactors() do

		for g,group in magpie.getgroups(actor) do

			table.insert(groups, group);

		end

	end

  	return {

		{"group", "Group", "choice", table.concat(groups, "|")},

  		{"toonz_output_file", "Output File", "output_file", "Text files (*.tls)\tAll files (*.*)"}

  	};

end

-- perform the export

function export:run(from, to, options)

	-- open output file

	fd = io.open(options.toonz_output_file, "wt");

	if (fd == nil) then

		return string.format("could not open '%s'", options.toonz_output_file);

	end

	-- write header line to file

	fd:write("Toonz\n");

	-- create an array of all the poses that are being exported

	line = "";

	poses = magpie.getposes(options.group);

	for p,pose in poses do

		line = string.gsub(pose, "[^%.]+%.", "");

		fd:write(line, "\n");

		line = "";

	end

	-- write data to file

	for frame = from, to do

		line = "";

		line = frame + magpie.getframeoffset();

		k = nil;

		k = magpie.getgroupvalue(frame, options.group);

		if (k ~= nil) then

			k = string.gsub(k, "[^%.]+%.", ""); -- remove actor and group name from string

		end

		if (k == nil) then

			k = "<none>";</none>

		end

		if (line ~= "") then

			line = line .. "|";

		end

		line = line .. k;

		if (line ~= "") then

			line = line .. "|";

		end

		comment = magpie.getframecomment(frame);

		if (comment ~= "") then

			is_empty = false;

		else

			comment = "<none>";</none>

		end

		line = line .. comment;

		fd:write(line, "\n");

		-- update progress bar in main window		

		magpie.progress("Exporting...", (frame - from) / (to - from));

	end

	magpie.progress("", 0); -- close progress bar

	fd:close(); -- close output file

end