gnoemoe/gnoemoe/gm-scripts.c

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <gtk/gtk.h>
#include <ruby.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
#include <libgnomevfs/gnome-vfs.h>
#include <sys/stat.h>
#include <sys/types.h>

#undef PACKAGE_BUGREPORT
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION

#include "gm-support.h"
#include "gm-debug.h"
#include "gm-world.h"
#include "gm-app.h"
#include "gm-scripts.h"

#include "gm-world.h"
#include "gm-string.h"

#define GM_SCRIPTS_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object), \
		GM_TYPE_SCRIPTS, GmScriptsPrivate))
#define RB_CALLBACK(x) (VALUE (*)())(x)
#define GM_SCRIPTS_GLOBAL PACKAGE_DATA_DIR "/" PACKAGE "/scripts"

static VALUE rb_world_class, rb_client_class, rb_scripts_class;

VALUE script_world_name(VALUE self);
VALUE gm_scripts_rb_world_new(GmWorld *world);
VALUE gm_scripts_rb_scripts_new(GmScripts *scripts);

void gm_scripts_rb_world_class_init();
void gm_scripts_rb_client_class_init();
void gm_scripts_rb_scripts_class_init();

void gm_scripts_unload(GmScripts *scripts);
void gm_scripts_rb_init();

struct _GmScriptsPrivate {
	GList *files;
	GmScript *loading;
	GList *monitors;
};

/* Signals */

enum {
	SCRIPT_ADDED,
	SCRIPT_CHANGED,
	SCRIPT_REMOVED,
	RELOAD,
	MESSAGE,
	ERROR,
	RUN,
	NUM_SIGNALS
};

static guint gm_scripts_signals[NUM_SIGNALS] = {0};

G_DEFINE_TYPE(GmScripts, gm_scripts, G_TYPE_OBJECT)

 
static void
gm_scripts_finalize(GObject *object) {
	GmScripts *scripts = GM_SCRIPTS(object);
	GList *monitors;
	
	gm_scripts_unload(scripts);
	
	for (monitors = scripts->priv->monitors; monitors; 
			monitors = monitors->next) {
		gnome_vfs_monitor_cancel((GnomeVFSMonitorHandle *)(monitors->data));
	}
	
	g_list_free(scripts->priv->monitors);
	scripts->priv->monitors = NULL;
	
	G_OBJECT_CLASS(gm_scripts_parent_class)->finalize(object);
}

static void
gm_scripts_class_init(GmScriptsClass *klass) {
	GObjectClass *object_class = G_OBJECT_CLASS(klass);
	
	object_class->finalize = gm_scripts_finalize;

	gm_scripts_signals[SCRIPT_ADDED] = 
		g_signal_new("script_added",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, script_added),
			NULL, NULL,
			g_cclosure_marshal_VOID__POINTER,
			G_TYPE_NONE,
			1,
			G_TYPE_POINTER);
	gm_scripts_signals[SCRIPT_CHANGED] = 
		g_signal_new("script_changed",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, script_changed),
			NULL, NULL,
			g_cclosure_marshal_VOID__POINTER,
			G_TYPE_NONE,
			1,
			G_TYPE_POINTER);
	gm_scripts_signals[SCRIPT_REMOVED] = 
		g_signal_new("script_removed",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, script_removed),
			NULL, NULL,
			g_cclosure_marshal_VOID__POINTER,
			G_TYPE_NONE,
			1,
			G_TYPE_POINTER);
	gm_scripts_signals[RELOAD] = 
		g_signal_new("reload",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, reload),
			NULL, NULL,
			g_cclosure_marshal_VOID__VOID,
			G_TYPE_NONE,
			0);
	gm_scripts_signals[MESSAGE] = 
		g_signal_new("message",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, message),
			NULL, NULL,
			g_cclosure_marshal_VOID__STRING,
			G_TYPE_NONE,
			1,
			G_TYPE_STRING);
	gm_scripts_signals[ERROR] = 
		g_signal_new("error",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, error),
			NULL, NULL,
			g_cclosure_marshal_VOID__STRING,
			G_TYPE_NONE,
			1,
			G_TYPE_STRING);
	gm_scripts_signals[RUN] = 
		g_signal_new("run",
			G_OBJECT_CLASS_TYPE(object_class),
			G_SIGNAL_RUN_LAST,
			G_STRUCT_OFFSET(GmScriptsClass, run),
			NULL, NULL,
			g_cclosure_marshal_VOID__STRING,
			G_TYPE_NONE,
			1,
			G_TYPE_STRING);	
		
	g_type_class_add_private(object_class, sizeof(GmScriptsPrivate));
	
	gm_scripts_rb_init();
}

void 
gm_scripts_rb_init(GmScriptsClass *klass) {
	ruby_init();

	gm_scripts_rb_world_class_init();
	gm_scripts_rb_client_class_init();
	gm_scripts_rb_scripts_class_init();
}

static void
gm_scripts_init(GmScripts *scripts) {
	scripts->priv = GM_SCRIPTS_GET_PRIVATE(scripts);
	
	scripts->priv->monitors = NULL;
	scripts->priv->files = NULL;
}

GmScripts *
gm_scripts_new() {
	GmScripts *scripts = GM_SCRIPTS(g_object_new(GM_TYPE_SCRIPTS, NULL));
	
	return scripts;
}

void gm_scripts_monitor_cb (GnomeVFSMonitorHandle *handle, 
                        const gchar *monitor_uri, const gchar *info_uri,
                        GnomeVFSMonitorEventType event_type, 
                        GmScripts *scripts) {
	gchar *filename = gnome_vfs_get_local_path_from_uri(info_uri);

	switch (event_type) {
		case GNOME_VFS_MONITOR_EVENT_CHANGED:
			gm_scripts_reload_file(scripts, filename);
		break;
		case GNOME_VFS_MONITOR_EVENT_DELETED:
			gm_scripts_remove_file(scripts, filename);
		break;
		case GNOME_VFS_MONITOR_EVENT_CREATED:
			gm_scripts_add_file(scripts, filename);
		break;
		default:
		break;
	}

	g_free(filename);
}

void
gm_script_function_destroy(GmScriptFunction *fi) {
	g_free(fi->name);
	g_free(fi->fname);
	g_free(fi->description);
	g_free(fi);
}

void
gm_script_destroy_functions(GmScript *script) {
	GList *functions;
	
	for (functions = script->functions; functions; 
			functions = functions->next) {
		gm_script_function_destroy((GmScriptFunction *)(functions->data));
	}
	
	g_list_free(script->functions);
	script->functions = NULL;
}

void
gm_script_destroy(GmScript *script) {
	gm_script_destroy_functions(script);
	g_free(script->filename);
	g_free(script);
}

void
gm_scripts_unload(GmScripts *scripts) {
	GList *files;
	
	for (files = scripts->priv->files; files; files = files->next) {
		gm_script_destroy((GmScript *)(files->data));
	}
	
	g_list_free(scripts->priv->files);
	scripts->priv->files = NULL;
}
  
GmScriptFunction *
gm_scripts_find(GmScripts *scripts, gchar *name) {
	GList *files;
	GList *functions;
	GmScriptFunction *func;
	GmScript *script;

	for (files = scripts->priv->files; files; files = files->next) {
		script = (GmScript *)(files->data);
		for (functions = script->functions; functions; 
				functions = functions->next) {
			func = (GmScriptFunction *)(functions->data);

			if (strcasecmp(func->name, name) == 0) {
				return func;
			}
		}
	}

	return NULL;
}

gboolean 
gm_scripts_add(GmScripts *scripts, gchar *name, gchar *fname, 
		gchar *description) {
	GmScriptFunction *func;

	if (gm_scripts_find(scripts, name) == NULL) {
		func = g_new(GmScriptFunction, 1);
		func->script = scripts->priv->loading;
		func->name = g_strdup(name);
		func->fname = g_strdup(fname);;  
		func->description = g_strdup(description);
		
		scripts->priv->loading->functions = 
				g_list_append(scripts->priv->loading->functions, func);
		return TRUE;
	} else {
		return FALSE;
	}  
}

VALUE 
gm_scripts_rb_register_functions_wrap(VALUE arg) {
	return rb_eval_string("register_functions");
}

void 
gm_scripts_rb_script_define_world(VALUE *world) {
	rb_define_variable("$world", world);
}

void 
gm_scripts_rb_error(GmScripts *scripts) {
	int c;
	VALUE lasterr;
	char *err;
	gchar *msg;
	VALUE ary;

	if(!NIL_P(ruby_errinfo)) {
		lasterr = rb_gv_get("$!"); 
		err = RSTRING(rb_obj_as_string(lasterr))->ptr;

		gm_debug_msg(DEBUG_DEFAULT, "GmScripts.Error: Error while executing Ruby code: %s", 
				err);

		msg = g_strdup_printf(_("Error in execution: %s"), err);  
		g_signal_emit(scripts, gm_scripts_signals[MESSAGE], 0, msg);
		g_free(msg);

		ary = rb_funcall(ruby_errinfo, rb_intern("backtrace"), 0);
		gm_debug_msg(DEBUG_DEFAULT, "GmScripts.Error: Ruby backtrace:");
		g_signal_emit(scripts, gm_scripts_signals[ERROR], 0, 
				_("Ruby backtrace:"));

		for (c = 0; c < RARRAY(ary)->len; c++) {
			gm_debug_msg(DEBUG_DEFAULT, "GmScripts.Error: \tfrom %s", 
					RSTRING(RARRAY(ary)->ptr[c])->ptr);

			msg = g_strdup_printf(_("\tfrom %s"), 
					RSTRING(RARRAY(ary)->ptr[c])->ptr);  
			g_signal_emit(scripts, gm_scripts_signals[ERROR], 0, msg);
			g_free(msg);        
		}
	}
}

int 
gm_scripts_rb_do(GmScripts *scripts, VALUE (*body)(), VALUE arg) {
	int status;
	    
	rb_protect(body, arg, &status);

	if (status != 0) {
		gm_scripts_rb_error(scripts);
		ruby_cleanup(status);
		return 0;
	}

	return 1;
}

VALUE
gm_scripts_run_function(GmScriptInfo *arg) {
	VALUE ret;
	gchar *argstr;
	gchar *func_all;

	if (arg->argstr) {
		argstr = gm_string_escape(arg->argstr);
		func_all = g_strconcat(arg->name, "(\"", argstr, "\")", NULL);
		g_free(argstr);
	} else {
		func_all = g_strconcat(arg->name, "()", NULL);
	}

	ret = rb_eval_string(func_all);
	g_free(func_all);

	return ret;
}

gboolean
gm_scripts_run(GmScripts *scripts, GmWorld *world, gchar *name, gchar *argstr) {
	VALUE rbWorld, rbClient;
	gchar *msg;
	GmScriptInfo *info;
	GmScriptFunction *f = gm_scripts_find(scripts, name);

	if (!f) {
		return FALSE;
	}

	info = g_new0(GmScriptInfo, 1);
	info->name = g_strdup(f->fname);

	if (argstr) {
		info->argstr = g_strdup(argstr);
		msg = g_strdup_printf(_("Run script '%s' from '%s' (%s)"), f->fname, 
		                    f->script->filename, argstr);
	} else {
		info->argstr = NULL;
		msg = g_strdup_printf(_("Run script '%s' from '%s' ()"), f->fname, 
		                    f->script->filename);
	}

	g_signal_emit(scripts, gm_scripts_signals[RUN], 0, msg);
	g_free(msg);

	gm_scripts_rb_do(scripts, RB_CALLBACK(rb_load_file), 
			(VALUE)(f->script->filename));
	ruby_exec();

	rbWorld = gm_scripts_rb_world_new(world);
	rb_define_variable("$world", &rbWorld);

	rbClient = rb_class_new_instance(0, NULL, rb_client_class);
	rb_define_variable("$client", &rbClient);

	gm_scripts_rb_do(scripts, RB_CALLBACK(gm_scripts_run_function), 
			(VALUE)info);    

	g_free(info->name);
	g_free(info->argstr);
	g_free(info);

	return TRUE;
}

VALUE
gm_scripts_rb_register_func_old(int argc, VALUE *argv) {
	gm_debug_msg(DEBUG_DEFAULT, "GmScripts.RegisterFunc: This is the deprecated way to "
			"register functions is does no longer work. Use $scripts.register "
			"instead.");
	
	return Qfalse;
}

void
gm_scripts_register_functions(GmScripts *scripts) {
	gchar *msg;
	VALUE rbScripts;
	
	gm_debug_msg(DEBUG_DEFAULT, "GmScripts.RegisterFunctions: registering functions in %s", 
			scripts->priv->loading->filename);

	msg = g_strdup_printf(_("Registering functions from '%s'"), 
			scripts->priv->loading->filename);
	g_signal_emit(scripts, gm_scripts_signals[MESSAGE], 0, msg);
	g_free(msg);

	// Okay, I'm desperate... define an empty register_functions method so
	// that the previous when gets cleared ... :(
	rb_eval_string("def register_functions() end");
	
	if (!gm_scripts_rb_do(scripts, RB_CALLBACK(rb_load_file), 
			(VALUE) scripts->priv->loading->filename)) {
	    return;
	}

	ruby_exec();
	
	rbScripts = gm_scripts_rb_scripts_new(scripts);
	rb_define_variable("$scripts", &rbScripts);
	rb_define_global_function("register_func", &gm_scripts_rb_register_func_old, 
			-1);
	
	gm_scripts_rb_do(scripts, 
			RB_CALLBACK(gm_scripts_rb_register_functions_wrap), 0);
}

void
gm_scripts_remove_file(GmScripts *scripts, const gchar *uri) {
	GList *f, *l;
	GmScript *script;

	l = g_list_copy(scripts->priv->files);

	for (f = l; f; f = f->next) {
		script = (GmScript *)(f->data);
		
		if (strcmp(script->filename, uri) == 0) {
			scripts->priv->files = g_list_remove(scripts->priv->files, script);
			
	    	gm_debug_msg(DEBUG_DEFAULT, "GmScripts.RemoveFile: Removing scripts from `%s'", 
	    			script->filename);
	    	g_signal_emit(scripts, gm_scripts_signals[SCRIPT_REMOVED], 0, 
	    			script);
	    	
			gm_script_destroy(script);
		}
	}

	g_list_free(l);
}
  
gboolean
gm_scripts_add_file(GmScripts *scripts, const gchar *uri) {
	GList *f;
	GmScript *script;
	gchar *msg;
	gchar *ext;
	
	// Only .rb files
	ext = strrchr(uri, '.');
	
	if (ext == NULL || strncmp(ext, ".rb", 2) != 0) {
		msg = g_strdup_printf(_("File `%s' is not a valid ruby file"), uri);
		
		gm_debug_msg(DEBUG_DEFAULT, "GmScripts.AddFile: %s", msg);
		g_signal_emit(scripts, gm_scripts_signals[ERROR], 0, msg);
		
		g_free(msg);
		return FALSE;
	}
	
	for (f = scripts->priv->files; f; f = f->next) {
		script = (GmScript *)(f->data);
		
		if (strcmp(script->filename, uri) == 0) {
			msg = g_strdup_printf(_("File `%s' already loaded"), uri);
			
			gm_debug_msg(DEBUG_DEFAULT, "GmScripts.AddFile: %s", msg);
			g_signal_emit(scripts, gm_scripts_signals[ERROR], 0, msg);
			
			g_free(msg);
			return FALSE;
		}
	}

	msg = g_strdup_printf(_("File `%s' added"), uri);
	gm_debug_msg(DEBUG_DEFAULT, "GmScripts.AddFile: %s", msg);
	g_free(msg);    
	
	script = g_new0(GmScript, 1);
	script->filename = g_strdup(uri);

	if (strncmp(uri, GM_SCRIPTS_GLOBAL, 
			strlen(GM_SCRIPTS_GLOBAL)) == 0) {
		script->type = GM_SCRIPT_TYPE_SHARE;
	} else {
		script->type = GM_SCRIPT_TYPE_USER;
	}
	
	scripts->priv->files = g_list_append(scripts->priv->files, script);
	scripts->priv->loading = script;
	
	gm_scripts_register_functions(scripts);
	g_signal_emit(scripts, gm_scripts_signals[SCRIPT_ADDED], 0, script);

	return TRUE;
}

void 
gm_scripts_reload_file(GmScripts *scripts, const gchar *uri) {
	GList *files;
	GmScript *script;
	
	for (files = scripts->priv->files; files; files = files->next) {
		script = (GmScript *)(files->data);
		
		if (strcmp(script->filename, uri) == 0) {
			// Remove all functions and reregister the file
			scripts->priv->loading = script;
			
			gm_script_destroy_functions(script);
			gm_scripts_register_functions(scripts);
			
			g_signal_emit(scripts, gm_scripts_signals[SCRIPT_CHANGED], 0, 
					script);
			return;
		}
	}
	
	// If the script does not yet exist, add it
	gm_scripts_add_file(scripts, uri);      
}
  
void
gm_scripts_load_dir(GmScripts *scripts, gchar *dirname) {
	gchar *filename;
	gchar *file;
	GDir *d;
	GnomeVFSMonitorHandle *handle;

	if (g_file_test(dirname, G_FILE_TEST_EXISTS) && 
		g_file_test(dirname, G_FILE_TEST_IS_DIR)) {

		if ((d = g_dir_open(dirname, 0, NULL))) {
			while ((file = (gchar *)g_dir_read_name(d))) {
				filename = g_strconcat(dirname, "/", file, NULL);
				gm_scripts_add_file(scripts, filename);
				g_free(filename);
			}
		}
		
		gnome_vfs_monitor_add(&handle, dirname, GNOME_VFS_MONITOR_DIRECTORY,
				(GnomeVFSMonitorCallback)gm_scripts_monitor_cb, scripts);
	    scripts->priv->monitors = g_list_append(scripts->priv->monitors, 
	    		handle);
	}
}

void
gm_scripts_load(GmScripts *scripts) {
	gchar *path;
	
	if (scripts->priv->files) {
		g_signal_emit(scripts, gm_scripts_signals[RELOAD], 0);
		gm_scripts_unload(scripts);
	}
	
	path = g_strconcat(gm_app_path(gm_app_instance()), "/scripts", NULL);
	
	// Make user dir if it doesn't exist
	if (!g_file_test(path, G_FILE_TEST_EXISTS)) {
		mkdir(path, 0750);
	}
	
    gm_scripts_load_dir(scripts, path);
    gm_scripts_load_dir(scripts, GM_SCRIPTS_GLOBAL);
    
    g_free(path);
}

GList *
gm_scripts_scripts(GmScripts *scripts) {
	return scripts->priv->files;
}
// Ruby class functions

VALUE
gm_scripts_rb_world_new(GmWorld *world) {
	VALUE tdata = Data_Wrap_Struct(rb_world_class, 0, 0, world);

	return tdata;
}

VALUE
gm_scripts_rb_scripts_new(GmScripts *scripts) {
	VALUE tdata = Data_Wrap_Struct(rb_scripts_class, 0, 0, scripts);

	return tdata;
}

// Ruby world class functions
static VALUE
gm_scripts_rb_world_name(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	return rb_str_new2(gm_options_get(gm_world_options(world), "name"));
}

static VALUE
gm_scripts_rb_world_host(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	return rb_str_new2(gm_options_get(gm_world_options(world), "host"));
}

static VALUE
gm_scripts_rb_world_port(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	return rb_str_new2(gm_options_get(gm_world_options(world), "port"));
}
  
static VALUE
gm_scripts_rb_world_writeln(VALUE self, VALUE str) {
	GmWorld *world;
	gchar *strVal;

	Data_Get_Struct(self, GmWorld, world);
	strVal = rb_string_value_cstr(&str);

	gm_world_writeln(world, strVal);

	return Qnil;
}

static VALUE
gm_scripts_rb_world_status(VALUE self, VALUE str) {
	GmWorld *world;
	gchar *strVal;

	Data_Get_Struct(self, GmWorld, world);
	strVal = rb_string_value_cstr(&str);

	gm_world_status(world, strVal);

	return Qnil;
}

static VALUE
gm_scripts_rb_world_sendln(VALUE self, VALUE str) {
	GmWorld *world;
	gchar *strVal;

	Data_Get_Struct(self, GmWorld, world);
	strVal = rb_string_value_cstr(&str);

	gm_world_sendln(world, strVal);

	return Qnil;
}

static VALUE
gm_scripts_rb_world_input(VALUE self, VALUE str) {
	GmWorld *world;
	gchar *strVal;

	Data_Get_Struct(self, GmWorld, world);
	strVal = rb_string_value_cstr(&str);

	gm_world_process_input(world, strVal);

	return Qnil;
}
  
static VALUE
gm_scripts_rb_world_loaded(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	if (gm_world_loaded(world)) {
		return Qtrue;
	} else {
		return Qfalse;
	}
}

static VALUE
gm_scripts_rb_world_connected(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	if (gm_world_state(world) == GM_NET_STATE_CONNECTED) {
		return Qtrue;
	} else {
		return Qfalse;
	}
}

static VALUE
gm_scripts_rb_world_quit(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	gm_world_unload(world);
	return Qnil;
}

static VALUE
gm_scripts_rb_world_connect(int argc, VALUE *argv, VALUE self) {
	GmWorld *world;
	const gchar *strHost, *strPort;

	Data_Get_Struct(self, GmWorld, world);

	if (argc == 0) {
		strHost = gm_options_get(gm_world_options(world), "host");
	} else {
		strHost = rb_string_value_cstr(&(argv[0]));
	}

	if (argc == 0 || argc == 1) {
		strPort = gm_options_get(gm_world_options(world), "port");
	} else {
		strPort = rb_string_value_cstr(&(argv[1]));
	}
	
	gm_world_connect_to(world, (gchar *)strHost, (gchar *)strPort);

	return Qnil;
}

static VALUE
gm_scripts_rb_world_disconnect(VALUE self) {
	GmWorld *world;

	Data_Get_Struct(self, GmWorld, world);

	gm_world_disconnect(world);
	return Qnil;
}
  
// Ruby client class functions
 
static VALUE
gm_scripts_rb_client_version(VALUE self) {
	return rb_str_new2(VERSION);
}

static VALUE
gm_scripts_rb_client_worlds(VALUE self) {
	GList *world;
	VALUE rb_array = rb_ary_new();
	VALUE rb_world;

	for (world = gm_app_worlds(gm_app_instance()); world; world = world->next) {
		rb_world = gm_scripts_rb_world_new((GmWorld *)(world->data));
		rb_ary_push(rb_array, rb_world);
	}

	return rb_array;
}

static VALUE
gm_scripts_rb_client_open(VALUE self, VALUE str) {
	GmWorld *world;
	gchar *strVal;

	strVal = rb_string_value_cstr(&str);

	world = gm_app_world_by_name(gm_app_instance(), strVal);

	if (world == NULL) {
		return Qfalse;
	} else {
		gm_world_load(world);
		return Qtrue;
	}
}

// Ruby scripts class functions
VALUE 
gm_scripts_rb_scripts_register(int argc, VALUE *argv, VALUE self) {
	char *name, *fname = NULL, *description = NULL;
	gchar *msg;
	GmScripts *scripts;
	
	Data_Get_Struct(self, GmScripts, scripts);
	
	if (argc > 1) {
		name = rb_string_value_cstr(&argv[0]);
		description = rb_string_value_cstr(&argv[1]);

		if (argc == 2) {
			fname = name;
		} else {
			fname = rb_string_value_cstr(&argv[2]);
		}

		if (gm_scripts_add(scripts, name, fname, description)) {
			msg = g_strdup_printf(_("Register function '%s' from '%s'"), name, 
					scripts->priv->loading->filename);
			gm_debug_msg(DEBUG_DEFAULT, "GmScripts.RbScriptsRegister: Adding script function "
					"%s from %s", name, scripts->priv->loading->filename);
			g_signal_emit(scripts, gm_scripts_signals[MESSAGE], 0, msg);
			g_free(msg);
			return Qtrue;
		} else {
			msg = g_strdup_printf(_("Script '%s' is already defined"), name);
			gm_debug_msg(DEBUG_DEFAULT, "GmScripts.RbScriptsRegister: Script function %s "
					"already defined!", name);
			g_signal_emit(scripts, gm_scripts_signals[ERROR], 0, msg);
			g_free(msg);
			return Qfalse;
		}
	} else {
	    return Qfalse;
	}
}

// Ruby class initializations

void 
gm_scripts_rb_world_class_init() {  
	rb_world_class = rb_define_class("World", rb_cObject);

	rb_define_method(rb_world_class, "name", gm_scripts_rb_world_name, 0);
	rb_define_method(rb_world_class, "host", gm_scripts_rb_world_host, 0);
	rb_define_method(rb_world_class, "port", gm_scripts_rb_world_port, 0);

	rb_define_method(rb_world_class, "writeln", gm_scripts_rb_world_writeln, 1);
	rb_define_method(rb_world_class, "println", gm_scripts_rb_world_writeln, 1);
	rb_define_method(rb_world_class, "status", gm_scripts_rb_world_status, 1);
	rb_define_method(rb_world_class, "sendln", gm_scripts_rb_world_sendln, 1);
	rb_define_method(rb_world_class, "input", gm_scripts_rb_world_input, 1);
	rb_define_method(rb_world_class, "quit", gm_scripts_rb_world_quit, 0);
	rb_define_method(rb_world_class, "connect", 
			gm_scripts_rb_world_connect, -1);
	rb_define_method(rb_world_class, "disconnect", 
			gm_scripts_rb_world_disconnect, 0);
	rb_define_method(rb_world_class, "loaded?", gm_scripts_rb_world_loaded, 0);
	rb_define_method(rb_world_class, "connected?", 
			gm_scripts_rb_world_connected, 0);
}

void 
gm_scripts_rb_client_class_init() {  
	rb_client_class = rb_define_class("Client", rb_cObject);

	rb_define_method(rb_client_class, "version", 
			gm_scripts_rb_client_version, 0);
	rb_define_method(rb_client_class, "worlds", 
			gm_scripts_rb_client_worlds, 0);
	rb_define_method(rb_client_class, "open", gm_scripts_rb_client_open, 1);
}

void 
gm_scripts_rb_scripts_class_init() {  
	rb_scripts_class = rb_define_class("Scripts", rb_cObject);

	rb_define_method(rb_scripts_class, "register", 
			gm_scripts_rb_scripts_register, -1);
}