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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* pine-importer.c
 * 
 * Authors: 
 *    Iain Holmes  <iain@ximian.com>
 *
 * 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 Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

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

#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>

#include <glib.h>

#include <bonobo/bonobo-object.h>
#include <bonobo/bonobo-generic-factory.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-context.h>
#include <bonobo/bonobo-main.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-moniker-util.h>
#include <bonobo-conf/bonobo-config-database.h>

#include <importer/evolution-intelligent-importer.h>
#include <importer/evolution-importer-client.h>
#include <importer/GNOME_Evolution_Importer.h>

#include <e-book.h>
#include <e-card-simple.h>

#define PINE_INTELLIGENT_IMPORTER_IID "OAFIID:GNOME_Evolution_Pine_Intelligent_Importer_Factory"
#define MBOX_IMPORTER_IID "OAFIID:GNOME_Evolution_Mail_Mbox_Importer"
#define KEY "pine-mail-imported"

/*#define SUPER_IMPORTER_DEBUG*/
#ifdef SUPER_IMPORTER_DEBUG
#define d(x) x
#else
#define d(x)
#endif

typedef struct {
    GList *dir_list;

    GNOME_Evolution_Importer importer;
    EvolutionImporterListener *listener;

    GtkWidget *mail;
    gboolean do_mail;
    GtkWidget *address;
    gboolean do_address;

    EBook *book;

    Bonobo_ConfigDatabase db;
} PineImporter;

typedef struct {
    char *parent;
    char *foldername;
    char *path;
} PineFolder;

static void import_next (PineImporter *importer);

static void
pine_store_settings (PineImporter *importer)
{
    bonobo_config_set_boolean (importer->db, "/Importer/Pine/mail", 
                   importer->do_mail, NULL);
    bonobo_config_set_boolean (importer->db, "/Importer/Pine/address", 
                   importer->do_address, NULL);
}

static void
pine_restore_settings (PineImporter *importer)
{
    importer->do_mail = bonobo_config_get_boolean_with_default (
        importer->db, "/Importer/Pine/mail", TRUE, NULL);

    importer->do_address = bonobo_config_get_boolean_with_default (
        importer->db, "/Importer/Pine/address", TRUE, NULL);

}

/* Pass in handle so we can get the next line if we need to */
static char *
get_field (char **start,
       FILE *handle)
{
    char line[4096];
    char *end, *field;
    int length;

    /* if this was the last line, just return */
    if (*start == NULL) {
        return NULL;
    }

    /* if start is just \n then we need the next line */
    if (**start == '\n') {
        d(g_warning ("Need next line"));
        if (fgets (line, 4096, handle) == NULL) {
            g_warning ("Hmmm, no next line");
            return NULL;
        }

        if (line[0] != ' ' || line[1] != ' ' || line[2] != ' ') {
            g_warning ("Next line was not a continuation line\n"
                   "Oppps: %s", line);
            return NULL;
        }

        *start = line + 3;
    }

    if (**start == '\t') {
        /* Blank field */

        *start += 1;
        return NULL;
    }

    end = strchr (*start, '\t');
    if (end == NULL) {
        /* the line was the last comment, so just return the line */
        length = strlen (line);
        line[length - 1] = 0;

        field = g_strdup (*start);
        
        *start = NULL;
    } else {
        /* Null the end */
        *end = 0;

        field = g_strdup (*start);
        *start = end + 1;
    }

    d(g_warning ("Found %s", field));
    return field;
}

/* A very basic address spliter.
   Returns the first email address
   denoted by <address> */
static char *
parse_address (const char *address)
{
    char *addr_dup, *result, *start, *end;

    addr_dup = g_strdup (address);
    start = strchr (addr_dup, '<');
    if (start == NULL) {
        /* Whole line is an address */
        return addr_dup;
    }

    start += 1;
    end = strchr (start, '>');
    if (end == NULL) {
        result = g_strdup (start);
        g_free (addr_dup);

        return result;
    }

    *end = 0;
    result = strdup (start);
    g_free (addr_dup);

    return result;
}

static void
import_addressfile (EBook *book,
            EBookStatus status,
            gpointer user_data)
{
    char *addressbook;
    FILE *handle;
    char line[4096];

    PineImporter *importer = user_data;

    addressbook = gnome_util_prepend_user_home (".addressbook");
    handle = fopen (addressbook, "r");
    g_free (addressbook);

    if (handle == NULL) {
        g_warning ("Cannot open .addressbook");
        return;
    }

    while (fgets (line, 4096, handle) != NULL) {
        char *nick, *fullname, *address, *comment, *fcc, *email = NULL;
        char *start;
        gboolean distrib = FALSE;

        start = line;
        nick = get_field (&start, handle);
        d(g_print ("Nick: %s\n", nick));

        fullname = get_field (&start, handle);
        d(g_print ("Fullname: %s\n", fullname));

        address = get_field (&start, handle);
        d(g_print ("Address: %s\n", address));

        if (*address == '(') {
            char nextline[4096];
            /* Fun, it's a distribution list */
            distrib = TRUE;
            
            /* if the last char of address == ) then this is the
               full list */
            while (fgets (nextline, 4096, handle)) {
                char *bracket;
                if (nextline[0] != ' ' ||
                    nextline[1] != ' ' ||
                    nextline[2] != ' ') {
                    /* Not a continuation line */
                    start = nextline;
                    break;
                }

                bracket = strchr (nextline, ')');
                if (bracket != NULL &&
                    *(bracket + 1) == '\t') {

                    *(bracket + 1) = 0;
                    d(g_print ("More addresses: %s\n", nextline));
                    start = bracket + 2;
                    break;
                } else {
                    d(g_print ("More addresses: %s\n", nextline));
                }
            }
        } else {
            email = parse_address (address);
        }

        fcc = get_field (&start, handle);
        d(g_print ("FCC: %s\n", fcc));

        comment = get_field (&start, handle);
        d(g_print ("Comment: %s\n", comment));

        if (distrib == FALSE) {
            /* This was not a distribution list...
               Evolution doesn't handle that yet (070501)
               Fixme when it does */
            ECard *card = e_card_new ("");
            ECardSimple *simple = e_card_simple_new (card);

            if (fullname != NULL)
                e_card_simple_set (simple, E_CARD_SIMPLE_FIELD_FULL_NAME,
                           fullname);
            else
                e_card_simple_set (simple, E_CARD_SIMPLE_FIELD_FILE_AS,
                           nick);

            e_card_simple_set (simple, E_CARD_SIMPLE_FIELD_EMAIL,
                       email);
            e_card_simple_set (simple, E_CARD_SIMPLE_FIELD_NOTE,
                       comment);
            e_card_simple_set (simple, E_CARD_SIMPLE_FIELD_NICKNAME,
                       nick);
            e_book_add_card (importer->book, simple->card, NULL, NULL);
        }
        
        g_free (nick);
        g_free (email);
        g_free (address);
        g_free (comment);
        g_free (fcc);
        g_free (fullname);
    }
    
    fclose (handle);
    if (importer->do_mail == FALSE) {
        if (importer->db != CORBA_OBJECT_NIL) {
            bonobo_object_release_unref (importer->db, NULL);
        }
        gtk_main_quit ();
    }
}

static void
import_addressbook (PineImporter *importer)
{
    char *path, *uri;

    importer->book = e_book_new ();
    if (importer->book == NULL) {
        g_warning ("Could not create EBook.");
        return;
    }

    path = g_concat_dir_and_file (g_get_home_dir (),
                      "evolution/local/Contacts/addressbook.db");
    uri = g_strdup_printf ("file://%s", path);
    g_free (path);

    if (!e_book_load_uri (importer->book, uri, import_addressfile, importer)) {
        g_warning ("Error calling load_uri");
    }
    g_free (uri);
}

static gboolean
importer_timeout_fn (gpointer data)
{
    PineImporter *importer = (PineImporter *) data;
    CORBA_Object objref;
    CORBA_Environment ev;

    CORBA_exception_init (&ev);
    objref = bonobo_object_corba_objref (BONOBO_OBJECT (importer->listener));
    GNOME_Evolution_Importer_processItem (importer->importer, objref, &ev);
    CORBA_exception_free (&ev);

    return FALSE;
}

static void
importer_cb (EvolutionImporterListener *listener,
         EvolutionImporterResult result,
         gboolean more_items,
         void *data)
{
    PineImporter *importer = (PineImporter *) data;
    CORBA_Object objref;
    CORBA_Environment ev;

    if (result == EVOLUTION_IMPORTER_NOT_READY ||
        result == EVOLUTION_IMPORTER_BUSY) {
        gtk_timeout_add (5000, importer_timeout_fn, data);
        return;
    }

    if (more_items) {
        CORBA_exception_init (&ev);
        objref = bonobo_object_corba_objref (BONOBO_OBJECT (importer->listener));
        GNOME_Evolution_Importer_processItem (importer->importer,
                              objref, &ev);
        if (ev._major != CORBA_NO_EXCEPTION) {
            g_warning ("Exception: %s", CORBA_exception_id (&ev));
            CORBA_exception_free (&ev);
            return;
        }
        CORBA_exception_free (&ev);
        return;
    }

    if (importer->dir_list) {
        import_next (importer);
    } else {
        bonobo_object_release_unref (importer->importer, NULL);
        if (importer->db != CORBA_OBJECT_NIL) {
            bonobo_object_release_unref (importer->db, NULL);
        }
        gtk_main_quit ();
    }
}

static gboolean
pine_import_file (PineImporter *importer,
          const char *path,
          const char *folderpath)
{
    CORBA_boolean result;
    CORBA_Environment ev;
    CORBA_Object objref;

    CORBA_exception_init (&ev);
    result = GNOME_Evolution_Importer_loadFile (importer->importer, path,
                            folderpath, &ev);
    if (ev._major != CORBA_NO_EXCEPTION || result == FALSE) {
        g_warning ("Exception here: %s\n%s, %s", CORBA_exception_id (&ev), path, folderpath);
        CORBA_Object_release (importer->importer, &ev);
        CORBA_exception_free (&ev);
        return FALSE;
    }

    importer->listener = evolution_importer_listener_new (importer_cb,
                                  importer);
    objref = bonobo_object_corba_objref (BONOBO_OBJECT (importer->listener));
    GNOME_Evolution_Importer_processItem (importer->importer, objref, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        g_warning ("Exception: %s", CORBA_exception_id (&ev));
        CORBA_exception_free (&ev);
    }
    CORBA_exception_free (&ev);

    return TRUE;
}

static gboolean
pine_can_import (EvolutionIntelligentImporter *ii,
         void *closure)
{
    PineImporter *importer = closure;
    char *maildir, *addrfile;
    gboolean mail;
    gboolean md_exists, addr_exists;

    /* Already imported */

    mail = bonobo_config_get_boolean_with_default (importer->db,
                "/Importer/Pine/mail-imported", FALSE, NULL);

    if (mail)
        return FALSE;

    importer->do_mail = !mail;

    maildir = gnome_util_prepend_user_home ("mail");
    md_exists = g_file_exists (maildir);
    importer->do_mail = md_exists;
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (importer->mail),
                      importer->do_mail);
    
    gtk_widget_set_sensitive (importer->mail, md_exists);
    g_free (maildir);

    addrfile = gnome_util_prepend_user_home (".addressbook");
    addr_exists = g_file_exists (addrfile);
    g_free (addrfile);
    gtk_widget_set_sensitive (importer->address, addr_exists);

    return md_exists || addr_exists;
}

static void
import_next (PineImporter *importer)
{
    PineFolder *data;

    if (importer->dir_list) {
        char *folder;

        data = importer->dir_list->data;

        folder = g_concat_dir_and_file (data->parent, data->foldername);
        pine_import_file (importer, data->path, folder);
        g_free (folder);
        g_free (data->parent);
        g_free (data->path);
        g_free (data->foldername);
        g_free (data);
        importer->dir_list = importer->dir_list->next;
    }

}

/* Pine uses sent-mail and saved-mail whereas Evolution uses Sent and Drafts */
static char *
maybe_replace_name (const char *original_name)
{
    if (strcmp (original_name, "sent-mail") == 0) {
        return g_strdup ("Sent");
    } else if (strcmp (original_name, "saved-messages") == 0) {
        return g_strdup ("Drafts");
    } 

    return g_strdup (original_name);
}

static void
scan_dir (PineImporter *importer,
      const char *dirname,
      const char *orig_parent)
{
    DIR *maildir;
    struct stat buf;
    struct dirent *current;
    
    maildir = opendir (dirname);
    if (maildir == NULL) {
        g_warning ("Could not open %s\nopendir returned: %s",
               dirname, g_strerror (errno));
        return;
    }
    
    current = readdir (maildir);
    while (current) {
        PineFolder *pf;
        char *fullname, *foldername;
        
        /* Ignore . and .. */
        if (current->d_name[0] == '.') {
            if (current->d_name[1] == '\0' ||
                (current->d_name[1] == '.' && current->d_name[2] == '\0')) {
                current = readdir (maildir);
                continue;
            }
        }

        if (*orig_parent == '/') {
            foldername = maybe_replace_name (current->d_name);
        } else {
            foldername = g_strdup (current->d_name);
        }
            
        fullname = g_concat_dir_and_file (dirname, current->d_name);
        if (stat (fullname, &buf) == -1) {
            g_warning ("Could not stat %s\nstat returned: %s",
                   fullname, g_strerror (errno));
            current = readdir (maildir);
            g_free (fullname);
            continue;
        }
        
        if (S_ISREG (buf.st_mode)) {
            pf = g_new (PineFolder, 1);
            pf->path = g_strdup (fullname);
            pf->parent = g_strdup (orig_parent);
            pf->foldername = g_strdup (foldername);
            importer->dir_list = g_list_append (importer->dir_list, pf);
        } else if (S_ISDIR (buf.st_mode)) {
            char *subdir;

            pf = g_new (PineFolder, 1);
            pf->path = NULL;
            pf->parent = g_strdup (orig_parent);
            pf->foldername = g_strdup (foldername);
/*              importer->dir_list = g_list_append (importer->dir_list, pf); */

            subdir = g_concat_dir_and_file (orig_parent, foldername);
            scan_dir (importer, fullname, subdir);
            g_free (subdir);
        }
        
        g_free (fullname);
        g_free (foldername);
        current = readdir (maildir);
    }
}

static void
pine_create_structure (EvolutionIntelligentImporter *ii,
               void *closure)
{
    CORBA_Environment ev;
    PineImporter *importer = closure;
    char *maildir;

    bonobo_object_ref (BONOBO_OBJECT (ii));
    pine_store_settings (importer);

    if (importer->do_address == TRUE) {
        bonobo_config_set_boolean (importer->db, 
                "/Importer/Pine/address-imported", TRUE, NULL);

        import_addressbook (importer);
    }

    if (importer->do_mail == TRUE) {
        bonobo_config_set_boolean (importer->db, 
                "/Importer/Pine/mail-imported", TRUE, NULL);

        maildir = gnome_util_prepend_user_home ("mail");
        scan_dir (importer, maildir, "/");
        g_free (maildir);

        /* Import them */
        import_next (importer);
    }

    CORBA_exception_init (&ev);
    Bonobo_ConfigDatabase_sync (importer->db, &ev);
    CORBA_exception_free (&ev);

    if (importer->do_mail == FALSE && importer->do_address == FALSE) {
        /* Destroy it here if we weren't importing mail
           otherwise the mail importer destroys itself
           once the mail is imported */

        /* Hmmm, this needs fixed badly */
        bonobo_object_unref (BONOBO_OBJECT (ii));
    }
}

static void
pine_destroy_cb (GtkObject *object,
         PineImporter *importer)
{
    CORBA_Environment ev;

    pine_store_settings (importer);

    CORBA_exception_init (&ev);
    Bonobo_ConfigDatabase_sync (importer->db, &ev);
    CORBA_exception_free (&ev);

    if (importer->db != CORBA_OBJECT_NIL) {
        bonobo_object_release_unref (importer->db, NULL);
    }
    importer->db = CORBA_OBJECT_NIL;

    if (importer->importer != CORBA_OBJECT_NIL) {
        bonobo_object_release_unref (importer->importer, NULL);
    }
    gtk_main_quit ();
}

/* Fun inity stuff */

/* Fun control stuff */
static void
checkbox_toggle_cb (GtkToggleButton *tb,
            gboolean *do_item)
{
    *do_item = gtk_toggle_button_get_active (tb);
}

static BonoboControl *
create_checkboxes_control (PineImporter *importer)
{
    GtkWidget *container, *vbox;
    BonoboControl *control;

    container = gtk_frame_new (_("Import"));
    vbox = gtk_vbox_new (FALSE, 2);
    gtk_container_set_border_width (GTK_CONTAINER (container), 2);
    gtk_container_add (GTK_CONTAINER (container), vbox);

    importer->mail = gtk_check_button_new_with_label (_("Mail"));
    gtk_signal_connect (GTK_OBJECT (importer->mail), "toggled",
                GTK_SIGNAL_FUNC (checkbox_toggle_cb),
                &importer->do_mail);

    importer->address = gtk_check_button_new_with_label (_("Addressbook"));
    gtk_signal_connect (GTK_OBJECT (importer->address), "toggled",
                GTK_SIGNAL_FUNC (checkbox_toggle_cb),
                &importer->do_address);

    gtk_box_pack_start (GTK_BOX (vbox), importer->mail, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), importer->address, FALSE, FALSE, 0);

    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (importer->mail), 
                      importer->do_mail);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (importer->address),
                      importer->do_address);

    gtk_widget_show_all (container);
    control = bonobo_control_new (container);
    return control;
}

static BonoboObject *
factory_fn (BonoboGenericFactory *_factory,
        void *closure)
{
    EvolutionIntelligentImporter *importer;
    BonoboControl *control;
    PineImporter *pine;
    CORBA_Environment ev;
    char *message = N_("Evolution has found Pine mail files.\n"
               "Would you like to import them into Evolution?");

    pine = g_new0 (PineImporter, 1);

    CORBA_exception_init (&ev);

    pine->db = bonobo_get_object ("wombat:", "Bonobo/ConfigDatabase", &ev);

    if (BONOBO_EX (&ev) || pine->db == CORBA_OBJECT_NIL) {
        g_free (pine);
        CORBA_exception_free (&ev);
        return NULL;
    }

    pine_restore_settings (pine);

    pine->importer = oaf_activate_from_id (MBOX_IMPORTER_IID, 0, NULL, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        g_warning ("Could not start MBox importer\n%s",
               CORBA_exception_id (&ev));
        CORBA_exception_free (&ev);
        return NULL;
    }
    CORBA_exception_free (&ev);

    importer = evolution_intelligent_importer_new (pine_can_import,
                               pine_create_structure,
                               _("Pine mail"),
                               _(message), pine);
    gtk_signal_connect (GTK_OBJECT (importer), "destroy",
                GTK_SIGNAL_FUNC (pine_destroy_cb), pine);

    control = create_checkboxes_control (pine);
    bonobo_object_add_interface (BONOBO_OBJECT (importer),
                     BONOBO_OBJECT (control));
    return BONOBO_OBJECT (importer);
}

static void
importer_init (void)
{
    BonoboGenericFactory *factory;

    factory = bonobo_generic_factory_new (PINE_INTELLIGENT_IMPORTER_IID,
                          factory_fn, NULL);
    if (factory == NULL) {
        g_warning ("Could not initialise Pine Intelligent Mail Importer.");
        exit (0);
    }
    
    bonobo_running_context_auto_exit_unref (BONOBO_OBJECT (factory));
}

int
main (int argc,
      char **argv)
{
    CORBA_ORB orb;

    bindtextdomain(PACKAGE, EVOLUTION_LOCALEDIR);
    textdomain(PACKAGE);
    
    gnome_init_with_popt_table ("Evolution-Pine-Importer",
                    VERSION, argc, argv, oaf_popt_options, 0,
                    NULL);
    orb = oaf_init (argc, argv);
    if (bonobo_init (orb, CORBA_OBJECT_NIL, CORBA_OBJECT_NIL) == FALSE) {
        g_error ("Could not initialise Bonobo");
        exit (0);
    }

    importer_init ();
    bonobo_main ();
    
    return 0;
}