/*
 *  template-history-model.c
 *  Copyright (C) 2009  Jim Evins <evins@snaught.com>.
 *
 *  This file is part of gLabels.
 *
 *  gLabels is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  gLabels is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>

#include "template-history-model.h"

#include <gio/gio.h>

#include <libglabels.h>
#include "marshal.h"


/*========================================================*/
/* Private types.                                         */
/*========================================================*/

struct _glTemplateHistoryModelPrivate {

	GSettings   *history;

        guint        max_n;
};

enum {
	CHANGED,
	LAST_SIGNAL
};


/*========================================================*/
/* Private globals.                                       */
/*========================================================*/

static guint signals[LAST_SIGNAL] = {0};


/*========================================================*/
/* Private function prototypes.                           */
/*========================================================*/

static void gl_template_history_model_finalize (GObject                 *object);

static void history_changed_cb                 (glTemplateHistoryModel  *this);


/*****************************************************************************/
/* Object infrastructure.                                                    */
/*****************************************************************************/
G_DEFINE_TYPE (glTemplateHistoryModel, gl_template_history_model, G_TYPE_OBJECT)


/*****************************************************************************/
/* Class Init Function.                                                      */
/*****************************************************************************/
static void
gl_template_history_model_class_init (glTemplateHistoryModelClass *class)
{
        GObjectClass  *gobject_class = (GObjectClass *) class;

        gl_template_history_model_parent_class = g_type_class_peek_parent (class);

        gobject_class->finalize = gl_template_history_model_finalize;

	signals[CHANGED] =
		g_signal_new ("changed",
			      G_OBJECT_CLASS_TYPE (gobject_class),
			      G_SIGNAL_RUN_LAST,
			      G_STRUCT_OFFSET (glTemplateHistoryModelClass, changed),
			      NULL, NULL,
			      gl_marshal_VOID__VOID,
			      G_TYPE_NONE,
			      0);
}


/*****************************************************************************/
/* Object Instance Init Function.                                            */
/*****************************************************************************/
static void
gl_template_history_model_init (glTemplateHistoryModel *this)
{
        this->priv = g_new0 (glTemplateHistoryModelPrivate, 1);
}


/*****************************************************************************/
/* Finalize Method.                                                          */
/*****************************************************************************/
static void
gl_template_history_model_finalize (GObject *object)
{
        glTemplateHistoryModel    *this;

        g_return_if_fail (object && IS_GL_TEMPLATE_HISTORY_MODEL (object));
        this = GL_TEMPLATE_HISTORY_MODEL (object);

        g_object_unref (G_OBJECT(this->priv->history));
        g_free (this->priv);

        G_OBJECT_CLASS (gl_template_history_model_parent_class)->finalize (object);
}


/*****************************************************************************/
/** New Object Generator.                                                    */
/*****************************************************************************/
glTemplateHistoryModel *
gl_template_history_model_new (guint n)
{
        glTemplateHistoryModel *this;

        this = g_object_new (TYPE_GL_TEMPLATE_HISTORY_MODEL, NULL);

        this->priv->history = g_settings_new ("org.gnome.glabels-3.history");

        g_signal_connect_swapped (G_OBJECT (this->priv->history),
                                  "changed::recent-templates",
                                  G_CALLBACK (history_changed_cb), this);

        this->priv->max_n = n;

        return this;
}


/*****************************************************************************/
/** New null Object Generator.                                               */
/*****************************************************************************/
glTemplateHistoryModel *
gl_template_history_model_new_null (void)
{
        glTemplateHistoryModel *this;

        this = g_object_new (TYPE_GL_TEMPLATE_HISTORY_MODEL, NULL);

        this->priv->max_n = 0;

        return this;
}


/*****************************************************************************/
/* Add template to history.                                                  */
/*****************************************************************************/
void
gl_template_history_model_add_name (glTemplateHistoryModel *this,
                                    const gchar            *name)
{
	if ( this->priv->history )
	{
		gchar **old;
		gchar **new;
		gint    i, j;

		old = g_settings_get_strv (this->priv->history, "recent-templates");
                                   
		new = g_new0 (gchar *, this->priv->max_n+1);

		/* Put in first slot. */
		new[0] = g_strdup (name);

		/* Push everthing else down, pruning any duplicate found. */
		for ( i = 0, j = 1; (j < (this->priv->max_n-1)) && old[i]; i++ )
		{
			if ( lgl_str_utf8_casecmp (name, old[i]) != 0 )
			{
				new[j++] = g_strdup (old[i]);
			}
		}

		g_settings_set_strv (this->priv->history, "recent-templates",
		                     (const gchar * const *)new);

		g_strfreev (old);
		g_strfreev (new);
	}
}


/*****************************************************************************/
/* History changed callback.                                                 */
/*****************************************************************************/
static void
history_changed_cb (glTemplateHistoryModel  *this)
{
        g_signal_emit (G_OBJECT(this), signals[CHANGED], 0);
}


/*****************************************************************************/
/* Get list of template families.                                            */
/*****************************************************************************/
GList *
gl_template_history_model_get_name_list (glTemplateHistoryModel *this)
{
        GList  *list = NULL;

        if ( this->priv->history )
	{
		gchar **strv;
		gint    i;

		strv = g_settings_get_strv (this->priv->history, "recent-templates");

		/*
		 * Proof read name list; transfer storage to new list.
		 */
		for ( i = 0; strv[i]; i++ )
		{
			if ( lgl_db_does_template_name_exist (strv[i]) )
			{
				list = g_list_append (list, g_strdup (strv[i]));
			}
		}
		g_strfreev (strv);
	}
        
        return list;
}


/*****************************************************************************/
/* Free template name list.                                                  */
/*****************************************************************************/
void
gl_template_history_model_free_name_list (GList *list)
{
        GList *p;

        for ( p = list; p; p=p->next )
        {
                g_free (p->data);
        }
        g_list_free (list);
}



/*
 * Local Variables:       -- emacs
 * mode: C                -- emacs
 * c-basic-offset: 8      -- emacs
 * tab-width: 8           -- emacs
 * indent-tabs-mode: nil  -- emacs
 * End:                   -- emacs
 */
