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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2003 Ximian, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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 library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "e-account.h"

#include <gal/util/e-util.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlmemory.h>

#define PARENT_TYPE G_TYPE_OBJECT
static GObjectClass *parent_class = NULL;

static void finalize (GObject *);

static void
class_init (GObjectClass *object_class)
{
    parent_class = g_type_class_ref (PARENT_TYPE);

    /* virtual method override */
    object_class->finalize = finalize;
}

static void
init (EAccount *account)
{
    account->id = g_new0 (EAccountIdentity, 1);
    account->source = g_new0 (EAccountService, 1);
    account->transport = g_new0 (EAccountService, 1);
}

static void
identity_destroy (EAccountIdentity *id)
{
    if (!id)
        return;

    g_free (id->name);
    g_free (id->address);
    g_free (id->reply_to);
    g_free (id->organization);

    g_free (id);
}

static void
service_destroy (EAccountService *service)
{
    if (!service)
        return;

    g_free (service->url);

    g_free (service);
}

static void
finalize (GObject *object)
{
    EAccount *account = E_ACCOUNT (object);

    g_free (account->name);
    g_free (account->uid);

    identity_destroy (account->id);
    service_destroy (account->source);
    service_destroy (account->transport);

    g_free (account->drafts_folder_uri);
    g_free (account->sent_folder_uri);

    g_free (account->cc_addrs);
    g_free (account->bcc_addrs);

    g_free (account->pgp_key);
    g_free (account->smime_key);

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

E_MAKE_TYPE (e_account, "EAccount", EAccount, class_init, init, PARENT_TYPE)


char *
e_account_gen_uid (void)
{
    static char *hostname;
    static int serial;

    if (!hostname) {
        static char buffer [512];

        if ((gethostname (buffer, sizeof (buffer) - 1) == 0) &&
            (buffer [0] != 0))
            hostname = buffer;
        else
            hostname = "localhost";
    }

    return g_strdup_printf ("%lu.%lu.%d@%s",
                (unsigned long) time (NULL),
                (unsigned long) getpid (),
                serial++,
                hostname);
}

/**
 * e_account_new:
 *
 * Return value: a blank new account which can be filled in and
 * added to an #EAccountList.
 **/
EAccount *
e_account_new (void)
{
    EAccount *account;

    account = g_object_new (E_TYPE_ACCOUNT, NULL);
    account->uid = e_account_gen_uid ();

    return account;
}

/**
 * e_account_new_from_xml:
 * @xml: an XML account description
 *
 * Return value: a new #EAccount based on the data in @xml, or %NULL
 * if @xml could not be parsed as valid account data.
 **/
EAccount *
e_account_new_from_xml (const char *xml)
{
    EAccount *account;

    account = g_object_new (E_TYPE_ACCOUNT, NULL);
    if (!e_account_set_from_xml (account, xml)) {
        g_object_unref (account);
        return NULL;
    }

    return account;
}


static gboolean
xml_set_bool (xmlNodePtr node, const char *name, gboolean *val)
{
    gboolean bool;
    char *buf;

    if ((buf = xmlGetProp (node, name))) {
        bool = (!strcmp (buf, "true") || !strcmp (buf, "yes"));
        xmlFree (buf);

        if (bool != *val) {
            *val = bool;
            return TRUE;
        }
    }

    return FALSE;
}

static gboolean
xml_set_int (xmlNodePtr node, const char *name, int *val)
{
    int number;
    char *buf;

    if ((buf = xmlGetProp (node, name))) {
        number = strtol (buf, NULL, 10);
        xmlFree (buf);

        if (number != *val) {
            *val = number;
            return TRUE;
        }
    }

    return FALSE;
}

static gboolean
xml_set_prop (xmlNodePtr node, const char *name, char **val)
{
    char *buf, *new_val;

    buf = xmlGetProp (node, name);
    new_val = g_strdup (buf);
    xmlFree (buf);

    /* We can use strcmp here whether the value is UTF8 or
     * not, since we only care if the bytes changed.
     */
    if (!*val || strcmp (*val, new_val)) {
        g_free (*val);
        *val = new_val;
        return TRUE;
    } else {
        g_free (new_val);
        return FALSE;
    }
}

static gboolean
xml_set_content (xmlNodePtr node, char **val)
{
    char *buf, *new_val;

    buf = xmlNodeGetContent (node);
        new_val = g_strdup (buf);
    xmlFree (buf);

    /* We can use strcmp here whether the value is UTF8 or
     * not, since we only care if the bytes changed.
     */
    if (!*val || strcmp (*val, new_val)) {
        g_free (*val);
        *val = new_val;
        return TRUE;
    } else {
        g_free (new_val);
        return FALSE;
    }
}

static gboolean
xml_set_identity (xmlNodePtr node, EAccountIdentity *id)
{
    gboolean changed = FALSE;

    for (node = node->children; node; node = node->next) {
        if (!strcmp (node->name, "name"))
            changed |= xml_set_content (node, &id->name);
        else if (!strcmp (node->name, "addr-spec"))
            changed |= xml_set_content (node, &id->address);
        else if (!strcmp (node->name, "reply-to"))
            changed |= xml_set_content (node, &id->reply_to);
        else if (!strcmp (node->name, "organization"))
            changed |= xml_set_content (node, &id->organization);
        else if (!strcmp (node->name, "signature")) {
            changed |= xml_set_bool (node, "auto", &id->auto_signature);
            changed |= xml_set_int (node, "default", &id->def_signature);
        }
    }

    return changed;
}

static gboolean
xml_set_service (xmlNodePtr node, EAccountService *service)
{
    gboolean changed = FALSE;
    int timeout;

    changed |= xml_set_bool (node, "save-passwd", &service->save_passwd);
    changed |= xml_set_bool (node, "keep-on-server", &service->keep_on_server);

    changed |= xml_set_bool (node, "auto-check", &service->auto_check);
    changed |= xml_set_int (node, "auto-check-timeout", &service->auto_check_time);
    if (service->auto_check && service->auto_check_time <= 0) {
        service->auto_check = FALSE;
        service->auto_check_time = 0;
    }

    for (node = node->children; node; node = node->next) {
        if (!strcmp (node->name, "url")) {
            changed |= xml_set_content (node, &service->url);
            break;
        }
    }

    return changed;
}

/**
 * e_account_set_from_xml:
 * @account: an #EAccount
 * @xml: an XML account description.
 *
 * Changes @account to match @xml.
 *
 * Return value: %TRUE if @account was changed, %FALSE if @account
 * already matched @xml or @xml could not be parsed
 **/
gboolean
e_account_set_from_xml (EAccount *account, const char *xml)
{
    xmlNodePtr node, cur;
    xmlDocPtr doc;
    gboolean changed = FALSE;

    if (!(doc = xmlParseDoc ((char *)xml)))
        return FALSE;

    node = doc->children;
    if (strcmp (node->name, "account") != 0) {
        xmlFreeDoc (doc);
        return FALSE;
    }

    if (!account->uid)
        xml_set_prop (node, "uid", &account->uid);

    changed |= xml_set_prop (node, "name", &account->name);
    changed |= xml_set_bool (node, "enabled", &account->enabled);

    for (node = node->children; node; node = node->next) {
        if (!strcmp (node->name, "identity")) {
            changed |= xml_set_identity (node, account->id);
        } else if (!strcmp (node->name, "source")) {
            changed |= xml_set_service (node, account->source);
        } else if (!strcmp (node->name, "transport")) {
            changed |= xml_set_service (node, account->transport);
        } else if (!strcmp (node->name, "drafts-folder")) {
            changed |= xml_set_content (node, &account->drafts_folder_uri);
        } else if (!strcmp (node->name, "sent-folder")) {
            changed |= xml_set_content (node, &account->sent_folder_uri);
        } else if (!strcmp (node->name, "auto-cc")) {
            changed |= xml_set_bool (node, "always", &account->always_cc);
            changed |= xml_set_content (node, &account->cc_addrs);
        } else if (!strcmp (node->name, "auto-bcc")) {
            changed |= xml_set_bool (node, "always", &account->always_bcc);
            changed |= xml_set_content (node, &account->bcc_addrs);
        } else if (!strcmp (node->name, "pgp")) {
            changed |= xml_set_bool (node, "encrypt-to-self", &account->pgp_encrypt_to_self);
            changed |= xml_set_bool (node, "always-trust", &account->pgp_always_trust);
            changed |= xml_set_bool (node, "always-sign", &account->pgp_always_sign);
            changed |= xml_set_bool (node, "no-imip-sign", &account->pgp_no_imip_sign);

            if (node->children) {
                for (cur = node->children; cur; cur = cur->next) {
                    if (!strcmp (cur->name, "key-id")) {
                        changed |= xml_set_content (cur, &account->pgp_key);
                        break;
                    }
                }
            }
        } else if (!strcmp (node->name, "smime")) {
            changed |= xml_set_bool (node, "encrypt-to-self", &account->smime_encrypt_to_self);
            changed |= xml_set_bool (node, "always-sign", &account->smime_always_sign);

            if (node->children) {
                for (cur = node->children; cur; cur = cur->next) {
                    if (!strcmp (cur->name, "key-id")) {
                        changed |= xml_set_content (cur, &account->smime_key);
                        break;
                    }
                }
            }
        }
    }

    xmlFreeDoc (doc);

    return changed;
}


/**
 * e_account_import:
 * @dest: destination account object
 * @src: source account object
 *
 * Import the settings from @src to @dest.
 **/
void
e_account_import (EAccount *dest, EAccount *src)
{
    g_free (dest->name);
    dest->name = g_strdup (src->name);
    
    dest->enabled = src->enabled;
    
    g_free (dest->id->name);
    dest->id->name = g_strdup (src->id->name);
    g_free (dest->id->address);
    dest->id->address = g_strdup (src->id->address);
    g_free (dest->id->reply_to);
    dest->id->reply_to = g_strdup (src->id->reply_to);
    g_free (dest->id->organization);
    dest->id->organization = g_strdup (src->id->organization);
    dest->id->def_signature = src->id->def_signature;
    dest->id->auto_signature = src->id->auto_signature;
    
    g_free (dest->source->url);
    dest->source->url = g_strdup (src->source->url);
    dest->source->keep_on_server = src->source->keep_on_server;
    dest->source->auto_check = src->source->auto_check;
    dest->source->auto_check_time = src->source->auto_check_time;
    dest->source->save_passwd = src->source->save_passwd;
    
    g_free (dest->transport->url);
    dest->transport->url = g_strdup (src->transport->url);
    dest->transport->save_passwd = src->transport->save_passwd;
    
    g_free (dest->drafts_folder_uri);
    dest->drafts_folder_uri = g_strdup (src->drafts_folder_uri);
    
    g_free (dest->sent_folder_uri);
    dest->sent_folder_uri = g_strdup (src->sent_folder_uri);
    
    dest->always_cc = src->always_cc;
    g_free (dest->cc_addrs);
    dest->cc_addrs = g_strdup (src->cc_addrs);
    
    dest->always_bcc = src->always_bcc;
    g_free (dest->bcc_addrs);
    dest->bcc_addrs = g_strdup (src->bcc_addrs);
    
    g_free (dest->pgp_key);
    dest->pgp_key = g_strdup (src->pgp_key);
    dest->pgp_encrypt_to_self = src->pgp_encrypt_to_self;
    dest->pgp_always_sign = src->pgp_always_sign;
    dest->pgp_no_imip_sign = src->pgp_no_imip_sign;
    dest->pgp_always_trust = src->pgp_always_trust;
    
    g_free (dest->smime_key);
    dest->smime_key = g_strdup (src->smime_key);
    dest->smime_encrypt_to_self = src->smime_encrypt_to_self;
    dest->smime_always_sign = src->smime_always_sign;
}


/**
 * e_account_to_xml:
 * @account: an #EAccount
 *
 * Return value: an XML representation of @account, which the caller
 * must free.
 **/
char *
e_account_to_xml (EAccount *account)
{
    xmlNodePtr root, node, id, src, xport;
    char *tmp, buf[20];
    xmlChar *xmlbuf;
    xmlDocPtr doc;
    int n;

    doc = xmlNewDoc ("1.0");

    root = xmlNewDocNode (doc, NULL, "account", NULL);
    xmlDocSetRootElement (doc, root);

    xmlSetProp (root, "name", account->name);
    xmlSetProp (root, "uid", account->uid);
    xmlSetProp (root, "enabled", account->enabled ? "true" : "false");

    id = xmlNewChild (root, NULL, "identity", NULL);
    if (account->id->name)
        xmlNewTextChild (id, NULL, "name", account->id->name);
    if (account->id->address)
        xmlNewTextChild (id, NULL, "addr-spec", account->id->address);
    if (account->id->reply_to)
        xmlNewTextChild (id, NULL, "reply-to", account->id->reply_to);
    if (account->id->organization)
        xmlNewTextChild (id, NULL, "organization", account->id->organization);

    node = xmlNewChild (id, NULL, "signature",NULL);
    xmlSetProp (node, "auto", account->id->auto_signature ? "true" : "false");
    sprintf (buf, "%d", account->id->def_signature);
    xmlSetProp (node, "default", buf);

    src = xmlNewChild (root, NULL, "source", NULL);
    xmlSetProp (src, "save-passwd", account->source->save_passwd ? "true" : "false");
    xmlSetProp (src, "keep-on-server", account->source->keep_on_server ? "true" : "false");
    xmlSetProp (src, "auto-check", account->source->auto_check ? "true" : "false");
    sprintf (buf, "%d", account->source->auto_check_time);
    xmlSetProp (src, "auto-check-timeout", buf);
    if (account->source->url)
        xmlNewTextChild (src, NULL, "url", account->source->url);

    xport = xmlNewChild (root, NULL, "transport", NULL);
    xmlSetProp (xport, "save-passwd", account->transport->save_passwd ? "true" : "false");
    if (account->transport->url)
        xmlNewTextChild (xport, NULL, "url", account->transport->url);

    xmlNewTextChild (root, NULL, "drafts-folder", account->drafts_folder_uri);
    xmlNewTextChild (root, NULL, "sent-folder", account->sent_folder_uri);

    node = xmlNewChild (root, NULL, "auto-cc", NULL);
    xmlSetProp (node, "always", account->always_cc ? "true" : "false");
    if (account->cc_addrs)
        xmlNewTextChild (node, NULL, "recipients", account->cc_addrs);

    node = xmlNewChild (root, NULL, "auto-bcc", NULL);
    xmlSetProp (node, "always", account->always_bcc ? "true" : "false");
    if (account->bcc_addrs)
        xmlNewTextChild (node, NULL, "recipients", account->bcc_addrs);

    node = xmlNewChild (root, NULL, "pgp", NULL);
    xmlSetProp (node, "encrypt-to-self", account->pgp_encrypt_to_self ? "true" : "false");
    xmlSetProp (node, "always-trust", account->pgp_always_trust ? "true" : "false");
    xmlSetProp (node, "always-sign", account->pgp_always_sign ? "true" : "false");
    xmlSetProp (node, "no-imip-sign", account->pgp_no_imip_sign ? "true" : "false");
    if (account->pgp_key)
        xmlNewTextChild (node, NULL, "key-id", account->pgp_key);

    node = xmlNewChild (root, NULL, "smime", NULL);
    xmlSetProp (node, "encrypt-to-self", account->smime_encrypt_to_self ? "true" : "false");
    xmlSetProp (node, "always-sign", account->smime_always_sign ? "true" : "false");
    if (account->smime_key)
        xmlNewTextChild (node, NULL, "key-id", account->smime_key);

    xmlDocDumpMemory (doc, &xmlbuf, &n);
    xmlFreeDoc (doc);

    /* remap to glib memory */
    tmp = g_malloc (n + 1);
    memcpy (tmp, xmlbuf, n);
    tmp[n] = '\0';
    xmlFree (xmlbuf);

    return tmp;
}


/**
 * e_account_uid_from_xml:
 * @xml: an XML account description
 *
 * Return value: the permanent UID of the account described by @xml
 * (or %NULL if @xml could not be parsed or did not contain a uid).
 * The caller must free this string.
 **/
char *
e_account_uid_from_xml (const char *xml)
{
    xmlNodePtr node;
    xmlDocPtr doc;
    char *uid = NULL;

    if (!(doc = xmlParseDoc ((char *)xml)))
        return NULL;

    node = doc->children;
    if (strcmp (node->name, "account") != 0) {
        xmlFreeDoc (doc);
        return NULL;
    }

    xml_set_prop (node, "uid", &uid);
    xmlFreeDoc (doc);

    return uid;
}