path: root/libempathy/gossip-utils.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2003-2007 Imendio AB
 * Copyright (C) 2007 Collabora Ltd.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Richard Hult <richard@imendio.com>
 *          Martyn Russell <martyn@imendio.com>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include "config.h"

#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <regex.h>

#include <glib/gi18n.h>

#include <libxml/uri.h>
#include <libmissioncontrol/mc-account.h>

#include "gossip-debug.h"
#include "gossip-utils.h"
#include "gossip-paths.h"
#include "empathy-session.h"
#include "empathy-contact-manager.h"

#define DEBUG_DOMAIN "Utils"

static void regex_init (void);

gchar *
gossip_substring (const gchar *str,
          gint         start,
          gint         end)
{
    return g_strndup (str + start, end - start);
}

/*
 * Regular Expression code to match urls.
 */
#define USERCHARS "-A-Za-z0-9"
#define PASSCHARS "-A-Za-z0-9,?;.:/!%$^*&~\"#'"
#define HOSTCHARS "-A-Za-z0-9"
#define PATHCHARS "-A-Za-z0-9_$.+!*(),;:@&=?/~#%"
#define SCHEME    "(news:|telnet:|nntp:|file:/|https?:|ftps?:|webcal:)"
#define USER      "[" USERCHARS "]+(:["PASSCHARS "]+)?"
#define URLPATH   "/[" PATHCHARS "]*[^]'.}>) \t\r\n,\\\"]"

static regex_t dingus[GOSSIP_REGEX_ALL];

static void
regex_init (void)
{
    static gboolean  inited = FALSE;
    const gchar     *expression;
    gint             i;

    if (inited) {
        return;
    }

    for (i = 0; i < GOSSIP_REGEX_ALL; i++) {
        switch (i) {
        case GOSSIP_REGEX_AS_IS:
            expression =
                SCHEME "//(" USER "@)?[" HOSTCHARS ".]+"
                "(:[0-9]+)?(" URLPATH ")?";
            break;
        case GOSSIP_REGEX_BROWSER:
            expression =
                "(www|ftp)[" HOSTCHARS "]*\\.[" HOSTCHARS ".]+"
                "(:[0-9]+)?(" URLPATH ")?";
            break;
        case GOSSIP_REGEX_EMAIL:
            expression =
                "(mailto:)?[a-z0-9][a-z0-9.-]*@[a-z0-9]"
                "[a-z0-9-]*(\\.[a-z0-9][a-z0-9-]*)+";
            break;
        case GOSSIP_REGEX_OTHER:
            expression =
                "news:[-A-Z\\^_a-z{|}~!\"#$%&'()*+,./0-9;:=?`]+"
                "@[" HOSTCHARS ".]+(:[0-9]+)?";
            break;
        default:
            /* Silence the compiler. */
            expression = NULL;
            continue;
        }

        memset (&dingus[i], 0, sizeof (regex_t));
        regcomp (&dingus[i], expression, REG_EXTENDED | REG_ICASE);
    }

    inited = TRUE;
}

gint
gossip_regex_match (GossipRegExType  type,
            const gchar     *msg,
            GArray          *start,
            GArray          *end)
{
    regmatch_t matches[1];
    gint       ret = 0;
    gint       num_matches = 0;
    gint       offset = 0;
    gint       i;

    g_return_val_if_fail (type >= 0 || type <= GOSSIP_REGEX_ALL, 0);

    regex_init ();

    while (!ret && type != GOSSIP_REGEX_ALL) {
        ret = regexec (&dingus[type], msg + offset, 1, matches, 0);
        if (ret == 0) {
            gint s;

            num_matches++;

            s = matches[0].rm_so + offset;
            offset = matches[0].rm_eo + offset;

            g_array_append_val (start, s);
            g_array_append_val (end, offset);
        }
    }

    if (type != GOSSIP_REGEX_ALL) {
        gossip_debug (DEBUG_DOMAIN,
                  "Found %d matches for regex type:%d",
                  num_matches, type);
        return num_matches;
    }

    /* If GOSSIP_REGEX_ALL then we run ALL regex's on the string. */
    for (i = 0; i < GOSSIP_REGEX_ALL; i++, ret = 0) {
        while (!ret) {
            ret = regexec (&dingus[i], msg + offset, 1, matches, 0);
            if (ret == 0) {
                gint s;

                num_matches++;

                s = matches[0].rm_so + offset;
                offset = matches[0].rm_eo + offset;

                g_array_append_val (start, s);
                g_array_append_val (end, offset);
            }
        }
    }

    gossip_debug (DEBUG_DOMAIN,
              "Found %d matches for ALL regex types",
              num_matches);

    return num_matches;
}

gint
gossip_strcasecmp (const gchar *s1,
           const gchar *s2)
{
    return gossip_strncasecmp (s1, s2, -1);
}

gint
gossip_strncasecmp (const gchar *s1,
            const gchar *s2,
            gsize        n)
{
    gchar *u1, *u2;
    gint   ret_val;

    u1 = g_utf8_casefold (s1, n);
    u2 = g_utf8_casefold (s2, n);

    ret_val = g_utf8_collate (u1, u2);
    g_free (u1);
    g_free (u2);

    return ret_val;
}

gboolean
gossip_xml_validate (xmlDoc      *doc,
             const gchar *dtd_filename)
{
    gchar        *path, *escaped;
    xmlValidCtxt  cvp;
    xmlDtd       *dtd;
    gboolean      ret;

    path = gossip_paths_get_dtd_path (dtd_filename);

    /* The list of valid chars is taken from libxml. */
    escaped = xmlURIEscapeStr (path, ":@&=+$,/?;");

    g_free (path);

    memset (&cvp, 0, sizeof (cvp));
    dtd = xmlParseDTD (NULL, escaped);
    ret = xmlValidateDtd (&cvp, doc, dtd);

    xmlFree (escaped);
    xmlFreeDtd (dtd);

    return ret;
}

xmlNodePtr
gossip_xml_node_get_child (xmlNodePtr   node, 
               const gchar *child_name)
{
    xmlNodePtr l;

        g_return_val_if_fail (node != NULL, NULL);
        g_return_val_if_fail (child_name != NULL, NULL);

    for (l = node->children; l; l = l->next) {
        if (l->name && strcmp (l->name, child_name) == 0) {
            return l;
        }
    }

    return NULL;
}

xmlChar *
gossip_xml_node_get_child_content (xmlNodePtr   node, 
                   const gchar *child_name)
{
    xmlNodePtr l;

        g_return_val_if_fail (node != NULL, NULL);
        g_return_val_if_fail (child_name != NULL, NULL);

    l = gossip_xml_node_get_child (node, child_name);
    if (l) {
        return xmlNodeGetContent (l);
    }
        
    return NULL;
}

xmlNodePtr
gossip_xml_node_find_child_prop_value (xmlNodePtr   node, 
                       const gchar *prop_name,
                       const gchar *prop_value)
{
    xmlNodePtr l;
    xmlNodePtr found = NULL;

        g_return_val_if_fail (node != NULL, NULL);
        g_return_val_if_fail (prop_name != NULL, NULL);
        g_return_val_if_fail (prop_value != NULL, NULL);

    for (l = node->children; l && !found; l = l->next) {
        xmlChar *prop;

        if (!xmlHasProp (l, prop_name)) {
            continue;
        }

        prop = xmlGetProp (l, prop_name);
        if (prop && strcmp (prop, prop_value) == 0) {
            found = l;
        }
        
        xmlFree (prop);
    }
        
    return found;
}

GType
gossip_dbus_type_to_g_type (const gchar *dbus_type_string)
{
    if (dbus_type_string == NULL)
        return G_TYPE_NONE;

    if (dbus_type_string[0] == 's') {
        return G_TYPE_STRING;
    }
    else if (dbus_type_string[0] == 'b') {
        return G_TYPE_BOOLEAN;
    }
    else if (dbus_type_string[0] == 'q') {
        return G_TYPE_UINT;
    }
    else if (dbus_type_string[0] == 'n') {
        return G_TYPE_INT;
    }

    g_assert_not_reached ();
    return G_TYPE_NONE;
}

const gchar *
gossip_g_type_to_dbus_type (GType g_type)
{
    switch (g_type)
    {
    case G_TYPE_STRING:
        return "s";
    case G_TYPE_BOOLEAN:
        return "b";
    case G_TYPE_UINT:
        return "q";
    case G_TYPE_INT:
        return "n";
    default:
        g_assert_not_reached ();
    }

    return NULL;
}

gchar *
gossip_g_value_to_string (const GValue *value)
{
    gchar  *return_string = NULL;
    GValue  string_g_value = {0, };

    g_value_init (&string_g_value, G_TYPE_STRING);
    g_value_transform (value, &string_g_value);
    return_string = g_value_dup_string (&string_g_value);
    g_value_unset (&string_g_value);

    return return_string;
}

GValue *
gossip_string_to_g_value (const gchar *str, GType type)
{
    GValue *g_value;

    g_value = g_new0 (GValue, 1);
    g_value_init (g_value, type);

    switch (type) {
    case G_TYPE_STRING:
        g_value_set_string (g_value, str);
        break;
    case G_TYPE_BOOLEAN:
        g_value_set_boolean (g_value, (str[0] == 'y' || str[0] == 'T'));
        break;
    case G_TYPE_UINT:
        g_value_set_uint (g_value, atoi (str));
        break;
    case G_TYPE_INT:
        g_value_set_int (g_value, atoi (str));
        break;
    default:
        g_assert_not_reached ();
    }

    return g_value;
}

gboolean
gossip_g_value_equal (const GValue *value1,
              const GValue *value2)
{
    GType type;

    g_return_val_if_fail (value1 != NULL, FALSE);
    g_return_val_if_fail (value2 != NULL, FALSE);

    type = G_VALUE_TYPE (value1);
    if (type != G_VALUE_TYPE (value2)) {
        return FALSE;
    }

    switch (type)
    {
    case G_TYPE_STRING: {
        const gchar *str1;
        const gchar *str2;

        str1 = g_value_get_string (value1);
        str2 = g_value_get_string (value2);
        return (str1 && str2 && strcmp (str1, str2) == 0) ||
               (G_STR_EMPTY (str1) && G_STR_EMPTY (str2));
    }
    case G_TYPE_BOOLEAN:
        return g_value_get_boolean (value1) == g_value_get_boolean (value2);
    case G_TYPE_UINT:
        return g_value_get_uint (value1) == g_value_get_uint (value2);
    case G_TYPE_INT:
        return g_value_get_int (value1) == g_value_get_int (value2);
    default:
        g_warning ("Unsupported GType in value comparaison");
    }

    return FALSE;
}

guint
gossip_account_hash (gconstpointer key)
{
    return g_str_hash (mc_account_get_unique_name (MC_ACCOUNT (key)));
}

gboolean
gossip_account_equal (gconstpointer a,
              gconstpointer b)
{
    const gchar *name_a;
    const gchar *name_b;

    name_a = mc_account_get_unique_name (MC_ACCOUNT (a));
    name_b = mc_account_get_unique_name (MC_ACCOUNT (b));

    return g_str_equal (name_a, name_b);
}

GossipContact *
gossip_get_own_contact_from_contact (GossipContact  *contact)
{
    EmpathyContactManager *manager;
    McAccount             *account;

    g_return_val_if_fail (GOSSIP_IS_CONTACT (contact), NULL);

    manager = empathy_session_get_contact_manager ();
    account = gossip_contact_get_account (contact);

    return empathy_contact_manager_get_own (manager, account);
}