path: root/mail/mail-session.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* mail-session.c: handles the session information and resource manipulation */
/*
 *  Copyright 2001 Ximian, Inc. (www.ximian.com)
 *
 *  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 Street #330, Boston, MA 02111-1307, USA.
 *
 */

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

#include <stdlib.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-config.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#include <libgnomeui/gnome-messagebox.h>
#include <libgnomeui/gnome-stock.h>
#include "camel/camel-filter-driver.h"
#include "filter/filter-context.h"
#include "filter/filter-filter.h"
#include "mail.h"
#include "mail-session.h"
#include "mail-tools.h"
#include "mail-mt.h"

CamelSession *session;


#define MAIL_SESSION_TYPE     (mail_session_get_type ())
#define MAIL_SESSION(obj)     (CAMEL_CHECK_CAST((obj), MAIL_SESSION_TYPE, MailSession))
#define MAIL_SESSION_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), MAIL_SESSION_TYPE, MailSessionClass))
#define MAIL_IS_SESSION(o)    (CAMEL_CHECK_TYPE((o), MAIL_SESSION_TYPE))


typedef struct _MailSession {
    CamelSession parent_object;

    GHashTable *passwords;
    gboolean interaction_enabled;
    FILE *filter_logfile;
} MailSession;

typedef struct _MailSessionClass {
    CamelSessionClass parent_class;

} MailSessionClass;


static char *get_password (CamelSession *session, const char *prompt,
               gboolean secret, CamelService *service,
               const char *item, CamelException *ex);
static void forget_password (CamelSession *session, CamelService *service,
                 const char *item, CamelException *ex);
static gboolean alert_user (CamelSession *session, CamelSessionAlertType type,
                const char *prompt, gboolean cancel);
static guint register_timeout (CamelSession *session, guint32 interval,
                   CamelTimeoutCallback cb, gpointer camel_data);
static gboolean remove_timeout (CamelSession *session, guint handle);
static CamelFilterDriver *get_filter_driver (CamelSession *session,
                         const char *type,
                         CamelException *ex);


static char *decode_base64 (char *base64);

static void
init (MailSession *session)
{
    char *key, *value;
    void *iter;

    session->passwords = g_hash_table_new (g_str_hash, g_str_equal);

    iter = gnome_config_private_init_iterator ("/Evolution/Passwords");
    if (iter) {
        while (gnome_config_iterator_next (iter, &key, &value)) {
            g_hash_table_insert (session->passwords,
                         decode_base64 (key),
                         decode_base64 (value));
            g_free (key);
            g_free (value);
        }
    }
}

static void
class_init (MailSessionClass *mail_session_class)
{
    CamelSessionClass *camel_session_class =
        CAMEL_SESSION_CLASS (mail_session_class);
    
    /* virtual method override */
    camel_session_class->get_password = get_password;
    camel_session_class->forget_password = forget_password;
    camel_session_class->alert_user = alert_user;
    camel_session_class->register_timeout = register_timeout;
    camel_session_class->remove_timeout = remove_timeout;
    camel_session_class->get_filter_driver = get_filter_driver;
}

static CamelType
mail_session_get_type (void)
{
    static CamelType mail_session_type = CAMEL_INVALID_TYPE;
    
    if (mail_session_type == CAMEL_INVALID_TYPE) {
        mail_session_type = camel_type_register (
            camel_session_get_type (),
            "MailSession",
            sizeof (MailSession),
            sizeof (MailSessionClass),
            (CamelObjectClassInitFunc) class_init,
            NULL,
            (CamelObjectInitFunc) init,
            NULL);
    }
    
    return mail_session_type;
}


static char *
make_key (CamelService *service, const char *item)
{
    char *key;
    
    if (service)
        key = camel_url_to_string (service->url, CAMEL_URL_HIDE_PASSWORD | CAMEL_URL_HIDE_PARAMS);
    else
        key = g_strdup (item);
    
    return key;
}

static char *
get_password (CamelSession *session, const char *prompt, gboolean secret,
          CamelService *service, const char *item, CamelException *ex)
{
    MailSession *mail_session = MAIL_SESSION (session);
    char *key, *ans;

    if (!strcmp(item, "popb4smtp_uri")) {
        char *url = camel_url_to_string(service->url, 0);
        const MailConfigAccount *account = mail_config_get_account_by_transport_url(url);

        g_free(url);
        if (account == NULL)
            return NULL;

        return g_strdup(account->source->url);
    }
    
    key = make_key (service, item);
    if (!key)
        return NULL;
    
    ans = g_hash_table_lookup (mail_session->passwords, key);
    if (ans) {
        g_free (key);
        return g_strdup (ans);
    }
    
    if (!mail_session->interaction_enabled ||
        !(ans = mail_get_password (service, prompt, secret))) {
        g_free (key);
        camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL,
                     _("User canceled operation."));
        return NULL;
    }
    
    g_hash_table_insert (mail_session->passwords, key, g_strdup (ans));
    return ans;
}

static void
forget_password (CamelSession *session, CamelService *service,
         const char *item, CamelException *ex)
{
    MailSession *mail_session = MAIL_SESSION (session);
    char *key = make_key (service, item);
    gpointer old_key, old_data;
    
    if (!g_hash_table_lookup_extended (mail_session->passwords, key,
                       &old_key, &old_data))
        return;
    
    g_hash_table_remove (mail_session->passwords, key);
    memset (old_data, 0, strlen (old_data));
    g_free (old_data);
    g_free (old_key);
}

static gboolean
alert_user (CamelSession *session, CamelSessionAlertType type,
        const char *prompt, gboolean cancel)
{
    MailSession *mail_session = MAIL_SESSION (session);
    const char *message_type = NULL;
    
    if (!mail_session->interaction_enabled)
        return FALSE;
    
    switch (type) {
    case CAMEL_SESSION_ALERT_INFO:
        message_type = GNOME_MESSAGE_BOX_INFO;
        break;
    case CAMEL_SESSION_ALERT_WARNING:
        message_type = GNOME_MESSAGE_BOX_WARNING;
        break;
    case CAMEL_SESSION_ALERT_ERROR:
        message_type = GNOME_MESSAGE_BOX_ERROR;
        break;
    }
    return mail_user_message (message_type, prompt, cancel);
}

/* ******************** */

struct _timeout_data {
    CamelTimeoutCallback cb;
    guint32 interval;
    void *camel_data;
    int result;
};

struct _timeout_msg {
    struct _mail_msg msg;
    
    CamelTimeoutCallback cb;
    gpointer camel_data;
};

static void
timeout_timeout (struct _mail_msg *mm)
{
    struct _timeout_msg *m = (struct _timeout_msg *)mm;
    
    /* we ignore the callback result, do we care?? no. */
    m->cb (m->camel_data);
}

static struct _mail_msg_op timeout_op = {
    NULL,
    timeout_timeout,
    NULL,
    NULL,
};

static gboolean 
camel_timeout (gpointer data)
{
    struct _timeout_data *td = data;
    struct _timeout_msg *m;
    
    m = mail_msg_new (&timeout_op, NULL, sizeof (*m));
    
    m->cb = td->cb;
    m->camel_data = td->camel_data;
    
    e_thread_put (mail_thread_queued, (EMsg *)m);
    
    return TRUE;
}

static void
do_register_timeout(CamelObject *o, void *edata, void *data)
{
    struct _timeout_data *td = (struct _timeout_data *)edata;

    td->result = gtk_timeout_add_full(td->interval, camel_timeout, NULL, td, g_free);
}

static void
do_remove_timeout(CamelObject *o, void *edata, void *data)
{
    gtk_timeout_remove(*((int *)edata));
}

static guint
register_timeout (CamelSession *session, guint32 interval, CamelTimeoutCallback cb, gpointer camel_data)
{
    struct _timeout_data *td;
    
    /* We do this because otherwise the timeout can get called
     * more often than the dispatch thread can get rid of it,
     * leading to timeout calls piling up, and we don't have a
     * good way to watch the return values. It's not cool.
     */
    if (interval < 1000) {
        g_warning("Timeout %u too small, increased to 1000", interval);
        interval = 1000;
    }
    
    /* This is extremely messy, we need to proxy to gtk thread for this */
    td = g_malloc (sizeof (*td));
    td->interval = interval;
    td->result = 0;
    td->cb = cb;
    td->camel_data = camel_data;

    mail_msg_wait(mail_proxy_event(do_register_timeout, (CamelObject *)session, td, NULL));

    if (td->result == 0) {
        g_free(td);
        return 0;
    }

    return td->result;
}

static gboolean
remove_timeout (CamelSession *session, guint handle)
{
    mail_msg_wait(mail_proxy_event(do_remove_timeout, (CamelObject *)session, &handle, NULL));

    return TRUE;
}

static CamelFolder *
get_folder (CamelFilterDriver *d, const char *uri, void *data, CamelException *ex)
{
    return mail_tool_uri_to_folder(uri, ex);
}

static CamelFilterDriver *
get_filter_driver (CamelSession *session, const char *type, CamelException *ex)
{
    CamelFilterDriver *driver;
    RuleContext *fc;
    GString *fsearch, *faction;
    FilterRule *rule = NULL;
    char *user, *system;
    
    user = g_strdup_printf ("%s/filters.xml", evolution_dir);
    system = EVOLUTION_DATADIR "/evolution/filtertypes.xml";
    fc = (RuleContext *)filter_context_new ();
    rule_context_load (fc, system, user);
    g_free (user);
    
    driver = camel_filter_driver_new ();
    camel_filter_driver_set_folder_func (driver, get_folder, NULL);
    
    if (mail_config_get_filter_log ()) {
        MailSession *ms = (MailSession *)session;
        
        if (ms->filter_logfile == NULL) {
            const char *filename;
            
            filename = mail_config_get_filter_log_path ();
            if (filename)
                ms->filter_logfile = fopen (filename, "a+");
        }
        if (ms->filter_logfile)
            camel_filter_driver_set_logfile (driver, ms->filter_logfile);
    }
    
    fsearch = g_string_new ("");
    faction = g_string_new ("");
    
    while ((rule = rule_context_next_rule (fc, rule, type))) {
        g_string_truncate (fsearch, 0);
        g_string_truncate (faction, 0);
        
        filter_rule_build_code (rule, fsearch);
        filter_filter_build_action ((FilterFilter *)rule, faction);
        
        camel_filter_driver_add_rule (driver, rule->name,
                          fsearch->str, faction->str);
    }
    
    g_string_free (fsearch, TRUE);
    g_string_free (faction, TRUE);
    
    gtk_object_unref (GTK_OBJECT (fc));
    return driver;
}


static char *
decode_base64 (char *base64)
{
    char *plain, *pad = "==";
    int len, out, state, save;
    
    len = strlen (base64);
    plain = g_malloc0 (len);
    state = save = 0;
    out = base64_decode_step (base64, len, plain, &state, &save);
    if (len % 4) {
        base64_decode_step (pad, 4 - len % 4, plain + out,
                    &state, &save);
    }
    
    return plain;
}

static void
maybe_remember_password (gpointer key, gpointer password, gpointer url)
{
    char *path, *key64, *pass64;
    int len, state, save;
    
    len = strlen (url);
    if (strncmp (key, url, len) != 0)
        return;
    
    len = strlen (key);
    key64 = g_malloc0 ((len + 2) * 4 / 3 + 1);
    state = save = 0;
    base64_encode_close (key, len, FALSE, key64, &state, &save);
    path = g_strdup_printf ("/Evolution/Passwords/%s", key64);
    g_free (key64);
    
    len = strlen (password);
    pass64 = g_malloc0 ((len + 2) * 4 / 3 + 1);
    state = save = 0;
    base64_encode_close (password, len, FALSE, pass64, &state, &save);
    
    gnome_config_private_set_string (path, pass64);
    g_free (path);
    g_free (pass64);
}

void
mail_session_remember_password (const char *url_string)
{
    GHashTable *passwords = MAIL_SESSION (session)->passwords;
    CamelURL *url;
    char *simple_url;
    
    url = camel_url_new (url_string, NULL);
    simple_url = camel_url_to_string (url, CAMEL_URL_HIDE_PASSWORD | CAMEL_URL_HIDE_PARAMS);
    camel_url_free (url);
    
    g_hash_table_foreach (passwords, maybe_remember_password, simple_url);
    g_free (simple_url);
}

void
mail_session_forget_password (const char *key)
{
    GHashTable *passwords = MAIL_SESSION (session)->passwords;
    gpointer okey, value;
    
    if (g_hash_table_lookup_extended (passwords, key, &okey, &value)) {
        g_hash_table_remove (passwords, key);
        memset (value, 0, strlen (value));
        g_free (okey);
        g_free (value);
    }
}

void
mail_session_init (void)
{
    char *camel_dir;
    
    if (camel_init (evolution_dir, TRUE) != 0)
        exit (0);
    
    session = CAMEL_SESSION (camel_object_new (MAIL_SESSION_TYPE));
    
    camel_dir = g_strdup_printf ("%s/mail", evolution_dir);
    camel_session_construct (session, camel_dir);
    g_free (camel_dir);
}

void
mail_session_enable_interaction (gboolean enable)
{
    MAIL_SESSION (session)->interaction_enabled = enable;
}

static gboolean
free_entry (gpointer key, gpointer value, gpointer user_data)
{
    g_free (key);
    memset (value, 0, strlen (value));
    g_free (value);
    return TRUE;
}

void
mail_session_forget_passwords (BonoboUIComponent *uih, void *user_data,
                   const char *path)
{
    GHashTable *passwords = MAIL_SESSION (session)->passwords;
    
    g_hash_table_foreach_remove (passwords, free_entry, NULL);
    gnome_config_private_clean_section ("/Evolution/Passwords");
    gnome_config_sync ();
}