path: root/calendar/conduits/memo/memo-conduit.c

/*
 * Evolution calendar - Memo Conduit
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Eskil Heyn Olsen <deity@eskil.dk>
 *      JP Rosevear <jpr@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#define G_LOG_DOMAIN "ememoconduit"

#include <glib/gi18n.h>
#include <libecal/e-cal-types.h>
#include <libecal/e-cal.h>
#include <libecal/e-cal-time-util.h>
#include <libedataserver/e-categories.h>
#include <pi-source.h>
#include <pi-socket.h>
#include <pi-dlp.h>
#include <pi-memo.h>
#include <libical/icaltypes.h>
#include <gpilotd/gnome-pilot-conduit.h>
#include <gpilotd/gnome-pilot-conduit-sync-abs.h>
#include <libgpilotdCM/gnome-pilot-conduit-management.h>
#include <libgpilotdCM/gnome-pilot-conduit-config.h>
#include <e-pilot-map.h>
#include <e-pilot-settings.h>
#include <e-pilot-util.h>
#include <e-config-listener.h>
#include <libecalendar-common-conduit.h>

GnomePilotConduit * conduit_get_gpilot_conduit (guint32);
void conduit_destroy_gpilot_conduit (GnomePilotConduit*);

#define CONDUIT_VERSION "0.1.6"

#define DEBUG_MEMOCONDUIT 1
/* #undef DEBUG_MEMOCONDUIT */

#ifdef DEBUG_MEMOCONDUIT
#define LOG(x) x
#else
#define LOG(x)
#endif

#define WARN g_warning
#define INFO g_message

typedef struct _EMemoLocalRecord EMemoLocalRecord;
typedef struct _EMemoConduitCfg EMemoConduitCfg;
typedef struct _EMemoConduitGui EMemoConduitGui;
typedef struct _EMemoConduitContext EMemoConduitContext;

/* Local Record */
struct _EMemoLocalRecord {
    /* The stuff from gnome-pilot-conduit-standard-abs.h
       Must be first in the structure, or instances of this
       structure cannot be used by gnome-pilot-conduit-standard-abs.
    */
    GnomePilotDesktopRecord local;

    /* The corresponding Comp object */
    ECalComponent *comp;

        /* pilot-link memo structure */
    struct Memo *memo;
};

gint lastDesktopUniqueID;

static void
memoconduit_destroy_record (EMemoLocalRecord *local)
{
    g_object_unref (local->comp);
    free_Memo (local->memo);
    g_free (local->memo);
    g_free (local);
}

/* Configuration */
struct _EMemoConduitCfg {
    guint32 pilot_id;
    GnomePilotConduitSyncType  sync_type;

    ESourceList *source_list;
    ESource *source;
    gboolean secret;
    gint priority;

    gchar *last_uri;
};

static EMemoConduitCfg *
memoconduit_load_configuration (guint32 pilot_id)
{
    EMemoConduitCfg *c;
    GnomePilotConduitManagement *management;
    GnomePilotConduitConfig *config;
    gchar prefix[256];


    g_snprintf (prefix, 255, "e-memo-conduit/Pilot_%u", pilot_id);

    c = g_new0 (EMemoConduitCfg,1);
    g_assert (c != NULL);

    c->pilot_id = pilot_id;

    management = gnome_pilot_conduit_management_new ((gchar*)"e_memo_conduit", GNOME_PILOT_CONDUIT_MGMT_ID);
    g_object_ref_sink (management);
    config = gnome_pilot_conduit_config_new (management, pilot_id);
    g_object_ref_sink (config);
    if (!gnome_pilot_conduit_config_is_enabled (config, &c->sync_type))
        c->sync_type = GnomePilotConduitSyncTypeNotSet;
    g_object_unref (config);
    g_object_unref (management);

    /* Custom settings */
    if (!e_cal_get_sources (&c->source_list, E_CAL_SOURCE_TYPE_JOURNAL, NULL))
        c->source_list = NULL;
    if (c->source_list) {
        c->source = e_pilot_get_sync_source (c->source_list);
        if (!c->source)
            c->source = e_source_list_peek_source_any (c->source_list);
        if (c->source) {
            g_object_ref (c->source);
        } else {
            g_object_unref (c->source_list);
            c->source_list = NULL;
        }
    }

    c->secret = e_pilot_setup_get_bool (prefix, "secret", FALSE);
    c->priority = e_pilot_setup_get_int (prefix, "priority", 3);
    c->last_uri = e_pilot_setup_get_string (prefix, "last_uri", NULL);

    return c;
}

static void
memoconduit_save_configuration (EMemoConduitCfg *c)
{
    gchar prefix[256];

    g_snprintf (prefix, 255, "e-memo-conduit/Pilot_%u", c->pilot_id);

    e_pilot_set_sync_source (c->source_list, c->source);
    e_pilot_setup_set_bool (prefix, "secret", c->secret);
    e_pilot_setup_set_int (prefix, "priority", c->priority);
    e_pilot_setup_set_string (prefix, "last_uri", c->last_uri ? c->last_uri : "");
}

static EMemoConduitCfg*
memoconduit_dupe_configuration (EMemoConduitCfg *c)
{
    EMemoConduitCfg *retval;

    g_return_val_if_fail (c != NULL, NULL);

    retval = g_new0 (EMemoConduitCfg, 1);
    retval->sync_type = c->sync_type;
    retval->pilot_id = c->pilot_id;

    if (c->source_list)
        retval->source_list = g_object_ref (c->source_list);
    if (c->source)
        retval->source = g_object_ref (c->source);
    retval->secret = c->secret;
    retval->priority = c->priority;
    retval->last_uri = g_strdup (c->last_uri);

    return retval;
}

static void
memoconduit_destroy_configuration (EMemoConduitCfg *c)
{
    g_return_if_fail (c != NULL);

    g_object_unref (c->source_list);
    g_object_unref (c->source);
    g_free (c->last_uri);
    g_free (c);
}

/* Context */
struct _EMemoConduitContext {
    GnomePilotDBInfo *dbi;

    EMemoConduitCfg *cfg;
    EMemoConduitCfg *new_cfg;
    GtkWidget *ps;

    struct MemoAppInfo ai;

    ECal *client;

    icaltimezone *timezone;
    ECalComponent *default_comp;
    GList *comps;
    GList *changed;
    GHashTable *changed_hash;
    GList *locals;

    EPilotMap *map;
};

static EMemoConduitContext *
e_memo_context_new (guint32 pilot_id)
{
    EMemoConduitContext *ctxt = g_new0 (EMemoConduitContext, 1);

    ctxt->cfg = memoconduit_load_configuration (pilot_id);
    ctxt->new_cfg = memoconduit_dupe_configuration (ctxt->cfg);
    ctxt->ps = NULL;
    ctxt->client = NULL;
    ctxt->timezone = NULL;
    ctxt->default_comp = NULL;
    ctxt->comps = NULL;
    ctxt->changed_hash = NULL;
    ctxt->changed = NULL;
    ctxt->locals = NULL;
    ctxt->map = NULL;

    return ctxt;
}

static gboolean
e_memo_context_foreach_change (gpointer key, gpointer value, gpointer data)
{
    g_free (key);

    return TRUE;
}

static void
e_memo_context_destroy (EMemoConduitContext *ctxt)
{
    GList *l;

    g_return_if_fail (ctxt != NULL);

    if (ctxt->cfg != NULL)
        memoconduit_destroy_configuration (ctxt->cfg);
    if (ctxt->new_cfg != NULL)
        memoconduit_destroy_configuration (ctxt->new_cfg);

    if (ctxt->client != NULL)
        g_object_unref (ctxt->client);

    if (ctxt->default_comp != NULL)
        g_object_unref (ctxt->default_comp);
    if (ctxt->comps != NULL) {
        for (l = ctxt->comps; l; l = l->next)
            g_object_unref (l->data);
        g_list_free (ctxt->comps);
    }

    if (ctxt->changed_hash != NULL) {
        g_hash_table_foreach_remove (ctxt->changed_hash, e_memo_context_foreach_change, NULL);
        g_hash_table_destroy (ctxt->changed_hash);
    }

    if (ctxt->locals != NULL) {
        for (l = ctxt->locals; l != NULL; l = l->next)
            memoconduit_destroy_record (l->data);
        g_list_free (ctxt->locals);
    }

    if (ctxt->changed != NULL)
        e_cal_free_change_list (ctxt->changed);

    if (ctxt->map != NULL)
        e_pilot_map_destroy (ctxt->map);

    g_free (ctxt);
}

/* Debug routines */
static gchar *
print_local (EMemoLocalRecord *local)
{
    static gchar buff[ 64 ];

    if (local == NULL) {
        sprintf (buff, "[NULL]");
        return buff;
    }

    if (local->memo && local->memo->text) {
        g_snprintf (buff, 64, "['%s']",
                local->memo->text ?
                local->memo->text : "");
        return buff;
    }

    strcpy (buff, "");
    return buff;
}

static gchar *print_remote (GnomePilotRecord *remote)
{
    static gchar buff[ 64 ];
    struct Memo memo;
#ifdef PILOT_LINK_0_12
    pi_buffer_t *buffer;
#endif

    if (remote == NULL) {
        sprintf (buff, "[NULL]");
        return buff;
    }

    memset (&memo, 0, sizeof (struct Memo));
#ifdef PILOT_LINK_0_12
    buffer = pi_buffer_new(DLP_BUF_SIZE);
    if(buffer == NULL){
        sprintf (buff, "[NULL]");
        return buff;
    }
    if(pi_buffer_append(buffer, remote->record, remote->length)==NULL){
        sprintf (buff, "[NULL]");
        return buff;
    }
    unpack_Memo (&memo, buffer, memo_v1);

    pi_buffer_free(buffer);
#else
    unpack_Memo (&memo, remote->record, remote->length);
#endif
    g_snprintf (buff, 64, "['%s']",
            memo.text ?
            memo.text : "");

    free_Memo (&memo);

    return buff;
}

static gint
start_calendar_server (EMemoConduitContext *ctxt)
{
    g_return_val_if_fail (ctxt != NULL, -2);

    if (ctxt->cfg->source) {
        ctxt->client = e_cal_new (ctxt->cfg->source, E_CAL_SOURCE_TYPE_JOURNAL);
        if (!e_cal_open (ctxt->client, TRUE, NULL))
            return -1;
    } else if (!e_cal_open_default (&ctxt->client, E_CAL_SOURCE_TYPE_JOURNAL, NULL, NULL, NULL)) {
        return -1;
    }

    return 0;
}

static icaltimezone *
get_default_timezone (void)
{
    EConfigListener *listener;
    icaltimezone *timezone = NULL;
    gchar *location;

    listener = e_config_listener_new ();

    location = e_config_listener_get_string_with_default (listener,
        "/apps/evolution/calendar/display/timezone", "UTC", NULL);
    if (!location || !location[0]) {
        g_free (location);
        location = g_strdup ("UTC");
    }

    timezone = icaltimezone_get_builtin_timezone (location);
    g_free (location);

    g_object_unref (listener);

    return timezone;
}

static gchar *
map_name (EMemoConduitContext *ctxt)
{
    gchar *filename;

    filename = g_strdup_printf ("%s/.evolution/memos/local/system/pilot-map-memo-%d.xml", g_get_home_dir (), ctxt->cfg->pilot_id);

    return filename;
}

static GList *
next_changed_item (EMemoConduitContext *ctxt, GList *changes)
{
    ECalChange *ccc;
    GList *l;

    for (l = changes; l != NULL; l = l->next) {
        const gchar *uid;

        ccc = l->data;

        e_cal_component_get_uid (ccc->comp, &uid);
        if (g_hash_table_lookup (ctxt->changed_hash, uid))
            return l;
    }

    return NULL;
}

static void
compute_status (EMemoConduitContext *ctxt, EMemoLocalRecord *local, const gchar *uid)
{
    ECalChange *ccc;

    local->local.archived = FALSE;
    local->local.secret = FALSE;

    ccc = g_hash_table_lookup (ctxt->changed_hash, uid);

    if (ccc == NULL) {
        local->local.attr = GnomePilotRecordNothing;
        return;
    }

    switch (ccc->type) {
    case E_CAL_CHANGE_ADDED:
        local->local.attr = GnomePilotRecordNew;
        break;
    case E_CAL_CHANGE_MODIFIED:
        local->local.attr = GnomePilotRecordModified;
        break;
    case E_CAL_CHANGE_DELETED:
        local->local.attr = GnomePilotRecordDeleted;
        break;
    }
}

static GnomePilotRecord
local_record_to_pilot_record (EMemoLocalRecord *local,
                  EMemoConduitContext *ctxt)
{
    GnomePilotRecord p;
#ifdef PILOT_LINK_0_12
    pi_buffer_t * buffer;
#else
    static gchar record[0xffff];
#endif

    memset(&p, 0, sizeof (p));

    g_assert (local->comp != NULL);
    g_assert (local->memo != NULL );

    LOG (g_message ( "local_record_to_pilot_record\n" ));

    memset (&p, 0, sizeof (GnomePilotRecord));

    p.ID = local->local.ID;
    p.category = local->local.category;
    p.attr = local->local.attr;
    p.archived = local->local.archived;
    p.secret = local->local.secret;

    /* Generate pilot record structure */
#ifdef PILOT_LINK_0_12
    buffer = pi_buffer_new(DLP_BUF_SIZE);
    if(buffer == NULL){
        pi_set_error(ctxt->dbi->pilot_socket, PI_ERR_GENERIC_MEMORY);
        return p;
    }

    pack_Memo (local->memo, buffer, memo_v1);
    p.record = g_new0(unsigned char, buffer->used);
    p.length = buffer->used;
    memcpy(p.record, buffer->data, buffer->used);

    pi_buffer_free(buffer);
#else
    p.record = (guchar *)record;
    p.length = pack_Memo (local->memo, p.record, 0xffff);
#endif
    return p;
}

/*
 * converts a ECalComponent object to a EMemoLocalRecord
 */
static void
local_record_from_comp (EMemoLocalRecord *local, ECalComponent *comp, EMemoConduitContext *ctxt)
{
    const gchar *uid;
    GSList *d_list = NULL;
    ECalComponentText *description;
    ECalComponentClassification classif;

    LOG (g_message ( "local_record_from_comp\n" ));

    g_return_if_fail (local != NULL);
    g_return_if_fail (comp != NULL);

    local->comp = comp;
    g_object_ref (comp);

    LOG(fprintf(stderr, "local_record_from_comp: calling e_cal_component_get_uid\n"));
    e_cal_component_get_uid (local->comp, &uid);
    LOG(fprintf(stderr, "local_record_from_comp: got UID - %s, calling e_pilot_map_lookup_pid\n", uid));
    local->local.ID = e_pilot_map_lookup_pid (ctxt->map, uid, TRUE);
    LOG(fprintf(stderr, "local_record_from_comp: local->local.ID == %lu\n", local->local.ID));

    compute_status (ctxt, local, uid);

    LOG(fprintf(stderr, "local_record_from_comp: local->local.attr: %d\n", local->local.attr));

    local->memo = g_new0 (struct Memo,1);

    /* Don't overwrite the category */
    if (local->local.ID != 0) {
#ifdef PILOT_LINK_0_12
        struct Memo memo;
        pi_buffer_t * record;
#else
        gchar record[0xffff];
#endif
        gint cat = 0;

#ifdef PILOT_LINK_0_12
        record = pi_buffer_new(DLP_BUF_SIZE);
        if(record == NULL){
            pi_set_error(ctxt->dbi->pilot_socket, PI_ERR_GENERIC_MEMORY);
            return;
        }
#endif

        LOG(fprintf(stderr, "local_record_from_comp: calling dlp_ReadRecordById\n"));
        if (dlp_ReadRecordById (ctxt->dbi->pilot_socket,
                    ctxt->dbi->db_handle,
#ifdef PILOT_LINK_0_12
                    local->local.ID, record,
                    NULL, NULL, &cat) > 0) {
            local->local.category = cat;
            memset (&memo, 0, sizeof (struct Memo));
            unpack_Memo (&memo, record, memo_v1);
            local->memo->text = strdup (memo.text);
            free_Memo (&memo);
        }
        pi_buffer_free (record);
#else
                    local->local.ID, &record,
                    NULL, NULL, NULL, &cat) > 0) {
            local->local.category = cat;
        }
#endif
        LOG(fprintf(stderr, "local_record_from_comp: done calling dlp_ReadRecordById\n"));
    }

    /*Category support*/
    e_pilot_local_category_to_remote(&(local->local.category), comp, &(ctxt->ai.category));

    /* STOP: don't replace these with g_strdup, since free_Memo
       uses free to deallocate */

    e_cal_component_get_description_list (comp, &d_list);
    if (d_list) {
        description = (ECalComponentText *) d_list->data;
        if (description && description->value){
            local->memo->text = e_pilot_utf8_to_pchar (description->value);
        }
        else{
            local->memo->text = NULL;
        }
    } else {
        local->memo->text = NULL;
    }

    e_cal_component_get_classification (comp, &classif);

    if (classif == E_CAL_COMPONENT_CLASS_PRIVATE)
        local->local.secret = 1;
    else
        local->local.secret = 0;

    local->local.archived = 0;
}

static void
local_record_from_uid (EMemoLocalRecord *local,
               const gchar *uid,
               EMemoConduitContext *ctxt)
{
    ECalComponent *comp;
    icalcomponent *icalcomp;
    GError *error = NULL;

    g_assert(local!=NULL);

    LOG(g_message("local_record_from_uid\n"));

    if (e_cal_get_object (ctxt->client, uid, NULL, &icalcomp, &error)) {
        comp = e_cal_component_new ();
        if (!e_cal_component_set_icalcomponent (comp, icalcomp)) {
            g_object_unref (comp);
            icalcomponent_free (icalcomp);
            return;
        }

        local_record_from_comp (local, comp, ctxt);
        g_object_unref (comp);
    } else if (error->code == E_CALENDAR_STATUS_OBJECT_NOT_FOUND) {
        comp = e_cal_component_new ();
        e_cal_component_set_new_vtype (comp, E_CAL_COMPONENT_JOURNAL);
        e_cal_component_set_uid (comp, uid);
        local_record_from_comp (local, comp, ctxt);
        g_object_unref (comp);
    } else {
        INFO ("Object did not exist");
    }

    g_clear_error (&error);
}


static ECalComponent *
comp_from_remote_record (GnomePilotConduitSyncAbs *conduit,
             GnomePilotRecord *remote,
             ECalComponent *in_comp,
             icaltimezone *timezone,
             struct MemoAppInfo *ai)
{
    ECalComponent *comp;
    struct Memo memo;
    struct icaltimetype now;
    icaltimezone *utc_zone;
    gchar *txt, *txt2, *txt3;
    gint i;
#ifdef PILOT_LINK_0_12
    pi_buffer_t * buffer;
#endif
    g_return_val_if_fail (remote != NULL, NULL);

#ifdef PILOT_LINK_0_12
    buffer = pi_buffer_new(DLP_BUF_SIZE);
    if(buffer == NULL){
        return NULL;
    }

    if(pi_buffer_append(buffer, remote->record, remote->length)==NULL){
        return NULL;
    }

    unpack_Memo (&memo, buffer, memo_v1);
    pi_buffer_free(buffer);
#else
    memset (&memo, 0, sizeof (struct Memo));
    unpack_Memo (&memo, remote->record, remote->length);
#endif

    utc_zone = icaltimezone_get_utc_timezone ();
    now = icaltime_from_timet_with_zone (time (NULL), FALSE,
                         utc_zone);

    if (in_comp == NULL) {
        comp = e_cal_component_new ();
        e_cal_component_set_new_vtype (comp, E_CAL_COMPONENT_JOURNAL);
        e_cal_component_set_created (comp, &now);
    } else {
        comp = e_cal_component_clone (in_comp);
    }

    e_cal_component_set_last_modified (comp, &now);

    /*Category support*/
    e_pilot_remote_category_to_local(remote->category, comp, &(ai->category));

    /* The iCal description field */
    if (!memo.text) {
        e_cal_component_set_comment_list (comp, NULL);
        e_cal_component_set_summary(comp, NULL);
    } else {
        gint idxToUse = -1, ntext = strlen(memo.text);
        gboolean foundNL = FALSE;
        GSList l;
        ECalComponentText text, sumText;

        for(i = 0; i<ntext && i<50; i++){
            if(memo.text[i] == '\n'){
                idxToUse = i;
                foundNL = TRUE;
                break;
            }
        }

        if(foundNL == FALSE){
            if(ntext > 50){
                txt2 = g_strndup(memo.text, 50);
            }
            else{
                txt2 = g_strdup(memo.text);

            }
        }
        else{
            txt2 = g_strndup(memo.text, idxToUse); /* cuts off '\n' */

        }

        sumText.value = txt3 = e_pilot_utf8_from_pchar(txt2);
        sumText.altrep = NULL;

        text.value = txt = e_pilot_utf8_from_pchar (memo.text);
        text.altrep = NULL;
        l.data = &text;
        l.next = NULL;

        e_cal_component_set_summary(comp, &sumText);
        e_cal_component_set_description_list (comp, &l);
        free (txt);
        g_free(txt2);
        free(txt3);
    }


    e_cal_component_set_transparency (comp, E_CAL_COMPONENT_TRANSP_NONE);

    if (remote->secret)
        e_cal_component_set_classification (comp, E_CAL_COMPONENT_CLASS_PRIVATE);
    else
        e_cal_component_set_classification (comp, E_CAL_COMPONENT_CLASS_PUBLIC);

    e_cal_component_commit_sequence (comp);

    free_Memo(&memo);

    return comp;
}

static void
check_for_slow_setting (GnomePilotConduit *c, EMemoConduitContext *ctxt)
{
    GnomePilotConduitStandard *conduit = GNOME_PILOT_CONDUIT_STANDARD (c);
    gint map_count;
    const gchar *uri;

    /* If there are no objects or objects but no log */
    map_count = g_hash_table_size (ctxt->map->pid_map);
    if (map_count == 0)
        gnome_pilot_conduit_standard_set_slow (conduit, TRUE);

    /* Or if the URI's don't match */
    uri = e_cal_get_uri (ctxt->client);
    LOG (g_message ( "  Current URI %s (%s)\n", uri, ctxt->cfg->last_uri ? ctxt->cfg->last_uri : "<NONE>" ));
    if (ctxt->cfg->last_uri != NULL && (strcmp (ctxt->cfg->last_uri, uri) != 0)) {
        gnome_pilot_conduit_standard_set_slow (conduit, TRUE);
        e_pilot_map_clear (ctxt->map);
    }

    if (gnome_pilot_conduit_standard_get_slow (conduit)) {
        ctxt->map->write_touched_only = TRUE;
        LOG (g_message ( "    doing slow sync\n" ));
    } else {
        LOG (g_message ( "    doing fast sync\n" ));
    }
}

/* Pilot syncing callbacks */
static gint
pre_sync (GnomePilotConduit *conduit,
      GnomePilotDBInfo *dbi,
      EMemoConduitContext *ctxt)
{
    GnomePilotConduitSyncAbs *abs_conduit;
    GList *l;
    gint len;
    guchar *buf;
    gchar *filename, *change_id;
    icalcomponent *icalcomp;
    gint num_records, add_records = 0, mod_records = 0, del_records = 0;
#ifdef PILOT_LINK_0_12
    pi_buffer_t * buffer;
#endif

    abs_conduit = GNOME_PILOT_CONDUIT_SYNC_ABS (conduit);

    LOG (g_message ( "---------------------------------------------------------\n" ));
    LOG (g_message ( "pre_sync: Memo Conduit v.%s", CONDUIT_VERSION ));
    g_message ("Memo Conduit v.%s", CONDUIT_VERSION);

    ctxt->dbi = dbi;
    ctxt->client = NULL;

    if (start_calendar_server (ctxt) != 0) {
        WARN(_("Could not start evolution-data-server"));
        gnome_pilot_conduit_error (conduit, _("Could not start evolution-data-server"));
        return -1;
    }

    /* Get the timezone */
    ctxt->timezone = get_default_timezone ();
    if (ctxt->timezone == NULL)
        return -1;
    LOG (g_message ( "  Using timezone: %s", icaltimezone_get_tzid (ctxt->timezone) ));

    /* Set the default timezone on the backend. */
    if (ctxt->timezone && !e_cal_set_default_timezone (ctxt->client, ctxt->timezone, NULL))
        return -1;

    /* Get the default component */
    if (!e_cal_get_default_object (ctxt->client, &icalcomp, NULL))
        return -1;

    ctxt->default_comp = e_cal_component_new ();
    if (!e_cal_component_set_icalcomponent (ctxt->default_comp, icalcomp)) {
        g_object_unref (ctxt->default_comp);
        icalcomponent_free (icalcomp);
        return -1;
    }

    /* Load the uid <--> pilot id map */
    filename = map_name (ctxt);
    e_pilot_map_read (filename, &ctxt->map);
    g_free (filename);

    /* Get the local database */
    if (!e_cal_get_object_list_as_comp (ctxt->client, "#t", &ctxt->comps, NULL))
        return -1;

    /* Count and hash the changes */
    change_id = g_strdup_printf ("pilot-sync-evolution-memo-%d", ctxt->cfg->pilot_id);
    if (!e_cal_get_changes (ctxt->client, change_id, &ctxt->changed, NULL))
        return -1;

    ctxt->changed_hash = g_hash_table_new (g_str_hash, g_str_equal);
    g_free (change_id);

    for (l = ctxt->changed; l != NULL; l = l->next) {
        ECalChange *ccc = l->data;
        const gchar *uid;

        e_cal_component_get_uid (ccc->comp, &uid);
        if (!e_pilot_map_uid_is_archived (ctxt->map, uid)) {

            g_hash_table_insert (ctxt->changed_hash, g_strdup (uid), ccc);

            switch (ccc->type) {
            case E_CAL_CHANGE_ADDED:
                add_records++;
                break;
            case E_CAL_CHANGE_MODIFIED:
                mod_records++;
                break;
            case E_CAL_CHANGE_DELETED:
                del_records++;
                break;
            }
        } else if (ccc->type == E_CAL_CHANGE_DELETED) {
            e_pilot_map_remove_by_uid (ctxt->map, uid);
        }
    }

    /* Set the count information */
    num_records = g_list_length (ctxt->comps);
    gnome_pilot_conduit_sync_abs_set_num_local_records(abs_conduit, num_records);
    gnome_pilot_conduit_sync_abs_set_num_new_local_records (abs_conduit, add_records);
    gnome_pilot_conduit_sync_abs_set_num_updated_local_records (abs_conduit, mod_records);
    gnome_pilot_conduit_sync_abs_set_num_deleted_local_records(abs_conduit, del_records);

    g_message("num_records: %d\nadd_records: %d\nmod_records: %d\ndel_records: %d\n",
        num_records, add_records, mod_records, del_records);

#ifdef PILOT_LINK_0_12
    buffer = pi_buffer_new(DLP_BUF_SIZE);
    if(buffer == NULL){
        pi_set_error(dbi->pilot_socket, PI_ERR_GENERIC_MEMORY);
        return -1;
    }

    len = dlp_ReadAppBlock (dbi->pilot_socket, dbi->db_handle, 0,
                DLP_BUF_SIZE,
                buffer);
#else
    buf = (guchar *)g_malloc (0xffff);
    len = dlp_ReadAppBlock (dbi->pilot_socket, dbi->db_handle, 0,
                  (guchar *)buf, 0xffff);
#endif
    if (len < 0) {
        WARN (_("Could not read pilot's Memo application block"));
        WARN ("dlp_ReadAppBlock(...) = %d", len);
        gnome_pilot_conduit_error (conduit,
                       _("Could not read pilot's Memo application block"));
        return -1;
    }
#ifdef PILOT_LINK_0_12
    buf = g_new0 (unsigned char,buffer->used);
    memcpy(buf, buffer->data, buffer->used);
    unpack_MemoAppInfo (&(ctxt->ai), buf, len);
    pi_buffer_free(buffer);
#else
    unpack_MemoAppInfo (&(ctxt->ai), buf, len);
#endif

    g_free (buf);

    lastDesktopUniqueID = 128;

    check_for_slow_setting (conduit, ctxt);
    if (ctxt->cfg->sync_type == GnomePilotConduitSyncTypeCopyToPilot
        || ctxt->cfg->sync_type == GnomePilotConduitSyncTypeCopyFromPilot)
        ctxt->map->write_touched_only = TRUE;

    return 0;
}

static gint
post_sync (GnomePilotConduit *conduit,
       GnomePilotDBInfo *dbi,
       EMemoConduitContext *ctxt)
{
    GList *changed;
    gchar *filename, *change_id;
    guchar *buf;
    gint dlpRetVal, len;

    buf = (guchar *)g_malloc (0xffff);

    len = pack_MemoAppInfo (&(ctxt->ai), buf, 0xffff);

    dlpRetVal = dlp_WriteAppBlock (dbi->pilot_socket, dbi->db_handle,
                  (guchar *)buf, len);

    g_free (buf);

    if (dlpRetVal < 0) {
        WARN (_("Could not write pilot's Memo application block"));
        WARN ("dlp_WriteAppBlock(...) = %d", dlpRetVal);
        gnome_pilot_conduit_error (conduit,
                       _("Could not write pilot's Memo application block"));
        return -1;
    }


    LOG (g_message ( "post_sync: Memo Conduit v.%s", CONDUIT_VERSION ));

    g_free (ctxt->cfg->last_uri);
    ctxt->cfg->last_uri = g_strdup (e_cal_get_uri (ctxt->client));
    memoconduit_save_configuration (ctxt->cfg);

    filename = map_name (ctxt);
    e_pilot_map_write (filename, ctxt->map);
    g_free (filename);

    /* FIX ME ugly hack - our changes musn't count, this does introduce
     * a race condition if anyone changes a record elsewhere during sycnc
         */
    change_id = g_strdup_printf ("pilot-sync-evolution-memo-%d", ctxt->cfg->pilot_id);
    if (e_cal_get_changes (ctxt->client, change_id, &changed, NULL))
        e_cal_free_change_list (changed);
    g_free (change_id);

    LOG (g_message ( "---------------------------------------------------------\n" ));

    return 0;
}

static gint
set_pilot_id (GnomePilotConduitSyncAbs *conduit,
          EMemoLocalRecord *local,
          guint32 ID,
          EMemoConduitContext *ctxt)
{
    const gchar *uid;

    LOG (g_message ( "set_pilot_id: setting to %d\n", ID ));

    e_cal_component_get_uid (local->comp, &uid);
    e_pilot_map_insert (ctxt->map, ID, uid, FALSE);

        return 0;
}

static gint
set_status_cleared (GnomePilotConduitSyncAbs *conduit,
            EMemoLocalRecord *local,
            EMemoConduitContext *ctxt)
{
    const gchar *uid;

    LOG (g_message ( "set_status_cleared: clearing status\n" ));

    e_cal_component_get_uid (local->comp, &uid);
    g_hash_table_remove (ctxt->changed_hash, uid);

        return 0;
}

static gint
for_each (GnomePilotConduitSyncAbs *conduit,
      EMemoLocalRecord **local,
      EMemoConduitContext *ctxt)
{
    static GList *comps, *iterator;
    static gint count;
        GList *unused;

    g_return_val_if_fail (local != NULL, -1);

    if (*local == NULL) {
        LOG (g_message ( "beginning for_each" ));

        comps = ctxt->comps;
        count = 0;

        if (comps != NULL) {
            LOG (g_message ( "for_each: iterating over %d records", g_list_length (comps)));

            *local = g_new0 (EMemoLocalRecord, 1);
            local_record_from_comp (*local, comps->data, ctxt);

            /* NOTE: ignore the return value, otherwise ctxt->locals
             * gets messed up. The calling function keeps track of
             * the *local variable */
            unused = g_list_prepend (ctxt->locals, *local);
            iterator = comps;
        } else {
            LOG (g_message ( "no events" ));
            (*local) = NULL;
            return 0;
        }
    } else {
        count++;

        if (g_list_next (iterator)) {
            iterator = g_list_next (iterator);

            *local = g_new0 (EMemoLocalRecord, 1);
            LOG(fprintf(stderr, "for_each: calling local_record_from_comp\n"));
            local_record_from_comp (*local, iterator->data, ctxt);

            /* NOTE: ignore the return value, otherwise ctxt->locals
             * gets messed up. The calling function keeps track of
             * the *local variable */
            unused = g_list_prepend (ctxt->locals, *local);
        } else {
            LOG (g_message ( "for_each ending" ));

            /* Tell the pilot the iteration is over */
            *local = NULL;

            return 0;
        }
    }

    return 0;
}

static gint
for_each_modified (GnomePilotConduitSyncAbs *conduit,
           EMemoLocalRecord **local,
           EMemoConduitContext *ctxt)
{
    static GList *iterator;
    static gint count;
        GList *unused;

    g_return_val_if_fail (local != NULL, 0);

    if (*local == NULL) {
        LOG (g_message ( "for_each_modified beginning\n" ));

        iterator = ctxt->changed;

        count = 0;

        LOG (g_message ( "iterating over %d records", g_hash_table_size (ctxt->changed_hash) ));

        iterator = next_changed_item (ctxt, iterator);
        if (iterator != NULL) {
            ECalChange *ccc = iterator->data;

            *local = g_new0 (EMemoLocalRecord, 1);
            local_record_from_comp (*local, ccc->comp, ctxt);

            /* NOTE: ignore the return value, otherwise ctxt->locals
             * gets messed up. The calling function keeps track of
             * the *local variable */
            unused = g_list_prepend (ctxt->locals, *local);
        } else {
            LOG (g_message ( "no events" ));

            *local = NULL;
        }
    } else {
        count++;

        iterator = g_list_next (iterator);
        if (iterator && (iterator = next_changed_item (ctxt, iterator))) {
            ECalChange *ccc = iterator->data;

            *local = g_new0 (EMemoLocalRecord, 1);
            local_record_from_comp (*local, ccc->comp, ctxt);

            /* NOTE: ignore the return value, otherwise ctxt->locals
             * gets messed up. The calling function keeps track of
             * the *local variable */
            unused = g_list_prepend (ctxt->locals, *local);
        } else {
            LOG (g_message ( "for_each_modified ending" ));

            /* Signal the iteration is over */
            *local = NULL;
        }
    }

    return 0;
}

static gint
compare (GnomePilotConduitSyncAbs *conduit,
     EMemoLocalRecord *local,
     GnomePilotRecord *remote,
     EMemoConduitContext *ctxt)
{
    /* used by the quick compare */
    GnomePilotRecord local_pilot;
    gint retval = 0;

    LOG (g_message ("compare: local=%s remote=%s...\n",
            print_local (local), print_remote (remote)));

    g_return_val_if_fail (local!=NULL,-1);
    g_return_val_if_fail (remote!=NULL,-1);

    local_pilot = local_record_to_pilot_record (local, ctxt);

    if (remote->length != local_pilot.length
        || memcmp (local_pilot.record, remote->record, remote->length))
        retval = 1;

    if (retval == 0)
        LOG (g_message ( "    equal" ));
    else
        LOG (g_message ( "    not equal" ));

    return retval;
}

static gint
add_record (GnomePilotConduitSyncAbs *conduit,
        GnomePilotRecord *remote,
        EMemoConduitContext *ctxt)
{
    ECalComponent *comp;
    gchar *uid;
    gint retval = 0;

    g_return_val_if_fail (remote != NULL, -1);

    LOG (g_message ( "add_record: adding %s to desktop\n", print_remote (remote) ));

    comp = comp_from_remote_record (conduit, remote, ctxt->default_comp, ctxt->timezone, &(ctxt->ai));

    /* Give it a new UID otherwise it will be the uid of the default comp */
    uid = e_cal_component_gen_uid ();
    e_cal_component_set_uid (comp, uid);

    if (!e_cal_create_object (ctxt->client, e_cal_component_get_icalcomponent (comp), NULL, NULL))
        return -1;

    e_pilot_map_insert (ctxt->map, remote->ID, uid, FALSE);

    g_object_unref (comp);

    return retval;
}

static gint
replace_record (GnomePilotConduitSyncAbs *conduit,
        EMemoLocalRecord *local,
        GnomePilotRecord *remote,
        EMemoConduitContext *ctxt)
{
    ECalComponent *new_comp;
    gint retval = 0;

    g_return_val_if_fail (remote != NULL, -1);

    LOG (g_message ("replace_record: replace %s with %s\n",
            print_local (local), print_remote (remote)));

    new_comp = comp_from_remote_record (conduit, remote, local->comp, ctxt->timezone, &(ctxt->ai));
    g_object_unref (local->comp);
    local->comp = new_comp;

    if (!e_cal_modify_object (ctxt->client, e_cal_component_get_icalcomponent (new_comp),
                       CALOBJ_MOD_ALL, NULL))
        return -1;

    return retval;
}

static gint
delete_record (GnomePilotConduitSyncAbs *conduit,
           EMemoLocalRecord *local,
           EMemoConduitContext *ctxt)
{
    const gchar *uid;

    g_return_val_if_fail (local != NULL, -1);
    g_return_val_if_fail (local->comp != NULL, -1);

    e_cal_component_get_uid (local->comp, &uid);

    LOG (g_message ( "delete_record: deleting %s", uid ));

    e_pilot_map_remove_by_uid (ctxt->map, uid);
    /* FIXME Error handling */
    e_cal_remove_object (ctxt->client, uid, NULL);

        return 0;
}

static gint
archive_record (GnomePilotConduitSyncAbs *conduit,
        EMemoLocalRecord *local,
        gboolean archive,
        EMemoConduitContext *ctxt)
{
    const gchar *uid;
    gint retval = 0;

    g_return_val_if_fail (local != NULL, -1);

    LOG (g_message ( "archive_record: %s\n", archive ? "yes" : "no" ));

    e_cal_component_get_uid (local->comp, &uid);
    e_pilot_map_insert (ctxt->map, local->local.ID, uid, archive);

        return retval;
}

static gint
match (GnomePilotConduitSyncAbs *conduit,
       GnomePilotRecord *remote,
       EMemoLocalRecord **local,
       EMemoConduitContext *ctxt)
{
    const gchar *uid;

    LOG (g_message ("match: looking for local copy of %s\n",
            print_remote (remote)));

    g_return_val_if_fail (local != NULL, -1);
    g_return_val_if_fail (remote != NULL, -1);

    *local = NULL;
    uid = e_pilot_map_lookup_uid (ctxt->map, remote->ID, TRUE);

    if (!uid)
        return 0;

    LOG (g_message ( "  matched\n" ));

    *local = g_new0 (EMemoLocalRecord, 1);
    local_record_from_uid (*local, uid, ctxt);

    return 0;
}

static gint
free_match (GnomePilotConduitSyncAbs *conduit,
        EMemoLocalRecord *local,
        EMemoConduitContext *ctxt)
{
    LOG (g_message ( "free_match: freeing\n" ));

    g_return_val_if_fail (local != NULL, -1);

    ctxt->locals = g_list_remove (ctxt->locals, local);

    memoconduit_destroy_record (local);

    return 0;
}

static gint
prepare (GnomePilotConduitSyncAbs *conduit,
     EMemoLocalRecord *local,
     GnomePilotRecord *remote,
     EMemoConduitContext *ctxt)
{
    LOG (g_message ( "prepare: encoding local %s\n", print_local (local) ));

    *remote = local_record_to_pilot_record (local, ctxt);

    return 0;
}

/* Pilot Settings Callbacks */
static void
fill_widgets (EMemoConduitContext *ctxt)
{
    if (ctxt->cfg->source)
        e_pilot_settings_set_source (E_PILOT_SETTINGS (ctxt->ps),
                         ctxt->cfg->source);
    e_pilot_settings_set_secret (E_PILOT_SETTINGS (ctxt->ps),
                     ctxt->cfg->secret);
}

static gint
create_settings_window (GnomePilotConduit *conduit,
            GtkWidget *parent,
            EMemoConduitContext *ctxt)
{
    LOG (g_message ( "create_settings_window" ));

    if (!ctxt->cfg->source_list)
        return -1;

    ctxt->ps = e_pilot_settings_new (ctxt->cfg->source_list);

    gtk_container_add (GTK_CONTAINER (parent), ctxt->ps);
    gtk_widget_show (ctxt->ps);

    fill_widgets (ctxt);

    return 0;
}

static void
display_settings (GnomePilotConduit *conduit, EMemoConduitContext *ctxt)
{
    LOG (g_message ( "display_settings" ));

    fill_widgets (ctxt);
}

static void
save_settings    (GnomePilotConduit *conduit, EMemoConduitContext *ctxt)
{
    LOG (g_message ( "save_settings" ));

    if (ctxt->new_cfg->source)
        g_object_unref (ctxt->new_cfg->source);
    ctxt->new_cfg->source = e_pilot_settings_get_source (E_PILOT_SETTINGS (ctxt->ps));
    g_object_ref (ctxt->new_cfg->source);
    ctxt->new_cfg->secret = e_pilot_settings_get_secret (E_PILOT_SETTINGS (ctxt->ps));

    memoconduit_save_configuration (ctxt->new_cfg);
}

static void
revert_settings  (GnomePilotConduit *conduit, EMemoConduitContext *ctxt)
{
    LOG (g_message ( "revert_settings" ));

    memoconduit_save_configuration (ctxt->cfg);
    memoconduit_destroy_configuration (ctxt->new_cfg);
    ctxt->new_cfg = memoconduit_dupe_configuration (ctxt->cfg);
}

GnomePilotConduit *
conduit_get_gpilot_conduit (guint32 pilot_id)
{
    GtkObject *retval;
    EMemoConduitContext *ctxt;

    LOG (g_message ( "in memo's conduit_get_gpilot_conduit\n" ));

    retval = gnome_pilot_conduit_sync_abs_new ((gchar*)"MemoDB", 0x6D656D6F);
    g_assert (retval != NULL);

    ctxt = e_memo_context_new (pilot_id);
    g_object_set_data (G_OBJECT (retval), "memoconduit_context", ctxt);

    g_signal_connect (retval, "pre_sync", G_CALLBACK (pre_sync), ctxt);
    g_signal_connect (retval, "post_sync", G_CALLBACK (post_sync), ctxt);

    g_signal_connect (retval, "set_pilot_id", G_CALLBACK (set_pilot_id), ctxt);
    g_signal_connect (retval, "set_status_cleared", G_CALLBACK (set_status_cleared), ctxt);

    g_signal_connect (retval, "for_each", G_CALLBACK (for_each), ctxt);
    g_signal_connect (retval, "for_each_modified", G_CALLBACK (for_each_modified), ctxt);
    g_signal_connect (retval, "compare", G_CALLBACK (compare), ctxt);

    g_signal_connect (retval, "add_record", G_CALLBACK (add_record), ctxt);
    g_signal_connect (retval, "replace_record", G_CALLBACK (replace_record), ctxt);
    g_signal_connect (retval, "delete_record", G_CALLBACK (delete_record), ctxt);
    g_signal_connect (retval, "archive_record", G_CALLBACK (archive_record), ctxt);

    g_signal_connect (retval, "match", G_CALLBACK (match), ctxt);
    g_signal_connect (retval, "free_match", G_CALLBACK (free_match), ctxt);

    g_signal_connect (retval, "prepare", G_CALLBACK (prepare), ctxt);

    /* Gui Settings */
    g_signal_connect (retval, "create_settings_window", G_CALLBACK (create_settings_window), ctxt);
    g_signal_connect (retval, "display_settings", G_CALLBACK (display_settings), ctxt);
    g_signal_connect (retval, "save_settings", G_CALLBACK (save_settings), ctxt);
    g_signal_connect (retval, "revert_settings", G_CALLBACK (revert_settings), ctxt);

    return GNOME_PILOT_CONDUIT (retval);
}

void
conduit_destroy_gpilot_conduit (GnomePilotConduit *conduit)
{
    GtkObject *obj = GTK_OBJECT (conduit);
    EMemoConduitContext *ctxt;

    ctxt = g_object_get_data (G_OBJECT (obj), "memoconduit_context");
    e_memo_context_destroy (ctxt);

    gtk_object_destroy (obj);
}