path: root/libempathy/empathy-contact-groups.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2005-2007 Imendio AB
 *
 * This program 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 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 *
 * Authors: Martyn Russell <martyn@imendio.com>
 */

#include "config.h"

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <glib.h>
#include <glib/gi18n-lib.h>

#include <libxml/parser.h>
#include <libxml/tree.h>

#include "empathy-utils.h"
#include "empathy-contact-groups.h"

#define DEBUG_FLAG EMPATHY_DEBUG_CONTACT
#include "empathy-debug.h"

#define CONTACT_GROUPS_XML_FILENAME "contact-groups.xml"
#define CONTACT_GROUPS_DTD_FILENAME "empathy-contact-groups.dtd"

typedef struct {
    gchar    *name;
    gboolean  expanded;
} ContactGroup;

static void          contact_groups_file_parse (const gchar  *filename);
static gboolean      contact_groups_file_save  (void);
static ContactGroup *contact_group_new         (const gchar  *name,
                        gboolean      expanded);
static void          contact_group_free        (ContactGroup *group);

static GList *groups = NULL;

void
empathy_contact_groups_get_all (void)
{
    gchar *dir;
    gchar *file_with_path;

    /* If already set up clean up first */
    if (groups) {
        g_list_foreach (groups, (GFunc)contact_group_free, NULL);
        g_list_free (groups);
        groups = NULL;
    }

    dir = g_build_filename (g_get_user_config_dir (), PACKAGE_NAME, NULL);
    file_with_path = g_build_filename (dir, CONTACT_GROUPS_XML_FILENAME, NULL);
    g_free (dir);

    if (g_file_test (file_with_path, G_FILE_TEST_EXISTS)) {
        contact_groups_file_parse (file_with_path);
    }

    g_free (file_with_path);
}

static void
contact_groups_file_parse (const gchar *filename)
{
    xmlParserCtxtPtr ctxt;
    xmlDocPtr        doc;
    xmlNodePtr       contacts;
    xmlNodePtr       account;
    xmlNodePtr       node;

    DEBUG ("Attempting to parse file:'%s'...", filename);

    ctxt = xmlNewParserCtxt ();

    /* Parse and validate the file. */
    doc = xmlCtxtReadFile (ctxt, filename, NULL, 0);
    if (!doc) {
        g_warning ("Failed to parse file:'%s'", filename);
        xmlFreeParserCtxt (ctxt);
        return;
    }

    if (!empathy_xml_validate (doc, CONTACT_GROUPS_DTD_FILENAME)) {
        g_warning ("Failed to validate file:'%s'", filename);
        xmlFreeDoc (doc);
        xmlFreeParserCtxt (ctxt);
        return;
    }

    /* The root node, contacts. */
    contacts = xmlDocGetRootElement (doc);

    account = NULL;
    node = contacts->children;
    while (node) {
        if (strcmp ((gchar *) node->name, "account") == 0) {
            account = node;
            break;
        }
        node = node->next;
    }

    node = NULL;
    if (account) {
        node = account->children;
    }

    while (node) {
        if (strcmp ((gchar *) node->name, "group") == 0) {
            gchar        *name;
            gchar        *expanded_str;
            gboolean      expanded;
            ContactGroup *contact_group;

            name = (gchar *) xmlGetProp (node, (const xmlChar *) "name");
            expanded_str = (gchar *) xmlGetProp (node, (const xmlChar *) "expanded");

            if (expanded_str && strcmp (expanded_str, "yes") == 0) {
                expanded = TRUE;
            } else {
                expanded = FALSE;
            }

            contact_group = contact_group_new (name, expanded);
            groups = g_list_append (groups, contact_group);

            xmlFree (name);
            xmlFree (expanded_str);
        }

        node = node->next;
    }

    DEBUG ("Parsed %d contact groups", g_list_length (groups));

    xmlFreeDoc (doc);
    xmlFreeParserCtxt (ctxt);
}

static ContactGroup *
contact_group_new (const gchar *name,
           gboolean     expanded)
{
    ContactGroup *group;

    group = g_new0 (ContactGroup, 1);

    group->name = g_strdup (name);
    group->expanded = expanded;

    return group;
}

static void
contact_group_free (ContactGroup *group)
{
    g_return_if_fail (group != NULL);

    g_free (group->name);

    g_free (group);
}

static gboolean
contact_groups_file_save (void)
{
    xmlDocPtr   doc;
    xmlNodePtr  root;
    xmlNodePtr  node;
    GList      *l;
    gchar      *dir;
    gchar      *file;

    dir = g_build_filename (g_get_user_config_dir (), PACKAGE_NAME, NULL);
    g_mkdir_with_parents (dir, S_IRUSR | S_IWUSR | S_IXUSR);
    file = g_build_filename (dir, CONTACT_GROUPS_XML_FILENAME, NULL);
    g_free (dir);

    doc = xmlNewDoc ((const xmlChar *) "1.0");
    root = xmlNewNode (NULL, (const xmlChar *) "contacts");
    xmlDocSetRootElement (doc, root);

    node = xmlNewChild (root, NULL, (const xmlChar *) "account", NULL);
    xmlNewProp (node, (const xmlChar *) "name", (const xmlChar *) "Default");

    for (l = groups; l; l = l->next) {
        ContactGroup *cg;
        xmlNodePtr    subnode;

        cg = l->data;

        subnode = xmlNewChild (node, NULL, (const xmlChar *) "group", NULL);
        xmlNewProp (subnode, (const xmlChar *) "expanded", cg->expanded ?
                (const xmlChar *) "yes" : (const xmlChar *) "no");
        xmlNewProp (subnode, (const xmlChar *) "name", (const xmlChar *) cg->name);
    }

    /* Make sure the XML is indented properly */
    xmlIndentTreeOutput = 1;

    DEBUG ("Saving file:'%s'", file);
    xmlSaveFormatFileEnc (file, doc, "utf-8", 1);
    xmlFreeDoc (doc);

    xmlCleanupParser ();
    xmlMemoryDump ();

    g_free (file);

    return TRUE;
}

gboolean
empathy_contact_group_get_expanded (const gchar *group)
{
    GList    *l;
    gboolean  default_val = TRUE;

    g_return_val_if_fail (group != NULL, default_val);

    for (l = groups; l; l = l->next) {
        ContactGroup *cg = l->data;

        if (!cg || !cg->name) {
            continue;
        }

        if (strcmp (cg->name, group) == 0) {
            return cg->expanded;
        }
    }

    return default_val;
}

void
empathy_contact_group_set_expanded (const gchar *group,
                   gboolean     expanded)
{
    GList        *l;
    ContactGroup *cg;
    gboolean      changed = FALSE;

    g_return_if_fail (group != NULL);

    for (l = groups; l; l = l->next) {
        cg = l->data;

        if (!cg || !cg->name) {
            continue;
        }

        if (strcmp (cg->name, group) == 0) {
            cg->expanded = expanded;
            changed = TRUE;
            break;
        }
    }

    /* if here... we don't have a ContactGroup for the group. */
    if (!changed) {
        cg = contact_group_new (group, expanded);
        groups = g_list_append (groups, cg);
    }

    contact_groups_file_save ();
}