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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Code for checking for duplicates when doing EContact work.
 *
 * Authors:
 *   Christopher James Lahey <clahey@ximian.com>
 *   Chris Toshok <toshok@ximian.com>
 *
 * Copyright (C) 2001, 2002, 2003, Ximian, Inc.
 */

#include <config.h>

#include "eab-contact-merging.h"
#include "eab-contact-compare.h"
#include <glade/glade.h>
#include <gtk/gtktable.h>
#include <gtk/gtk.h>
#include <gtk/gtkcombo.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkdialog.h>
#include <gtk/gtkcontainer.h>
#include <string.h>
#include "addressbook/gui/widgets/eab-contact-display.h"
#include "e-util/e-util-private.h"
#include <libgnome/gnome-i18n.h>

typedef struct dropdown_data dropdown_data;
typedef enum {
    E_CONTACT_MERGING_ADD,
    E_CONTACT_MERGING_COMMIT
} EContactMergingOpType;

typedef struct {
    EContactMergingOpType op;
    EBook *book;
    /*contact is the new contact which the user has tried to add to the addressbook*/
    EContact *contact;
    /*match is the duplicate contact already existing in the addressbook*/
    EContact *match;
    GList *avoid;
    EBookIdCallback id_cb;
    EBookCallback   cb;
    gpointer closure;
} EContactMergingLookup;

struct dropdown_data {
    EContact *match;
    EContactField field;
};
static void match_query_callback (EContact *contact, EContact *match, EABContactMatchType type, gpointer closure);

#define SIMULTANEOUS_MERGING_REQUESTS 20

static GList *merging_queue = NULL;
static int running_merge_requests = 0;


static void
add_lookup (EContactMergingLookup *lookup)
{
    if (running_merge_requests < SIMULTANEOUS_MERGING_REQUESTS) {
        running_merge_requests++;
        eab_contact_locate_match_full (lookup->book, lookup->contact, lookup->avoid, match_query_callback, lookup);
    }
    else {
        merging_queue = g_list_append (merging_queue, lookup);
    }
}

static void
finished_lookup (void)
{
    running_merge_requests--;

    while (running_merge_requests < SIMULTANEOUS_MERGING_REQUESTS) {
        EContactMergingLookup *lookup;

        if (!merging_queue)
            break;

        lookup = merging_queue->data;

        merging_queue = g_list_remove_link (merging_queue, merging_queue);

        running_merge_requests++;
        eab_contact_locate_match_full (lookup->book, lookup->contact, lookup->avoid, match_query_callback, lookup);
    }
}

static void
free_lookup (EContactMergingLookup *lookup)
{
    g_object_unref (lookup->book);
    g_object_unref (lookup->contact);
    g_list_free (lookup->avoid);
    if(lookup->match)
        g_object_unref (lookup->match);
    g_free (lookup);
}

static void
final_id_cb (EBook *book, EBookStatus status, const char *id, gpointer closure)
{
    EContactMergingLookup *lookup = closure;

    if (lookup->id_cb)
        lookup->id_cb (lookup->book, status, id, lookup->closure);

    free_lookup (lookup);

    finished_lookup ();
}

static void
final_cb (EBook *book, EBookStatus status, gpointer closure)
{
    EContactMergingLookup *lookup = closure;

    if (lookup->cb)
        lookup->cb (lookup->book, status, lookup->closure);

    free_lookup (lookup);

    finished_lookup ();
}

static void
doit (EContactMergingLookup *lookup)
{
    if (lookup->op == E_CONTACT_MERGING_ADD)
        e_book_async_add_contact (lookup->book, lookup->contact, final_id_cb, lookup);
    else if (lookup->op == E_CONTACT_MERGING_COMMIT)
        e_book_async_commit_contact (lookup->book, lookup->contact, final_cb, lookup);
}

static void
cancelit (EContactMergingLookup *lookup)
{
    if (lookup->op == E_CONTACT_MERGING_ADD) {
        final_id_cb (lookup->book, E_BOOK_ERROR_CANCELLED, NULL, lookup);
    } else if (lookup->op == E_CONTACT_MERGING_COMMIT) {
        final_cb (lookup->book, E_BOOK_ERROR_CANCELLED, lookup);
    }
}

static void
dialog_map (GtkWidget *window, GdkEvent *event, GtkWidget *table)
{
    int h, w;

    /* Spacing around the table */
    w = table->allocation.width + 30;
    /* buttons and outer spacing */
    h = table->allocation.height + 60;
    if (w > 400)
        w = 400;
    if (h > 450)
        h = 450;

    gtk_widget_set_size_request (window, w, h);
}

static void
dropdown_changed (GtkWidget *dropdown, dropdown_data *data)
{
    char *str;
    str = gtk_combo_box_get_active_text (GTK_COMBO_BOX (dropdown));

    if (g_ascii_strcasecmp(str, ""))
        e_contact_set (data->match, data->field, str);
    else
        e_contact_set (data->match, data->field, NULL);
    return;
}

static int
mergeit (EContactMergingLookup *lookup)
{
    GtkWidget *scrolled_window, *label, *hbox, *dropdown;
    GtkDialog *dialog;
    GtkTable *table;
    EContactField field;
    char *str = NULL, *string = NULL, *string1 = NULL;
    int num_of_email;
    GList *email_attr_list;
    int row = -1;
    int value;

    dialog = (GtkDialog *)(gtk_dialog_new_with_buttons (_("Merge Contact"), NULL, GTK_DIALOG_NO_SEPARATOR, NULL));
    gtk_container_border_width (GTK_CONTAINER(dialog), 5);

    scrolled_window = gtk_scrolled_window_new (NULL, NULL); 
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
                    GTK_POLICY_AUTOMATIC,
                    GTK_POLICY_AUTOMATIC);

    table = (GtkTable *) gtk_table_new (20, 2, FALSE);
    gtk_container_set_border_width ((GtkContainer *) table, 12);
    gtk_table_set_row_spacings (table, 6);
    gtk_table_set_col_spacings (table, 2);

    gtk_dialog_add_buttons ((GtkDialog *) dialog,
                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                _("Merge"), GTK_RESPONSE_OK,
                NULL);

    email_attr_list = e_contact_get_attributes (lookup->match, E_CONTACT_EMAIL);
    num_of_email = g_list_length (email_attr_list);

    /*we match all the string fields of the already existing contact and the new contact.*/
    for(field = E_CONTACT_FULL_NAME; field != (E_CONTACT_LAST_SIMPLE_STRING -1) ; field++) {
        dropdown_data *data = NULL;
        string = (char *)e_contact_get_const (lookup->contact, field);
        string1 = (char *)e_contact_get_const (lookup->match, field);

        /*the field must exist in the new as well as the duplicate contact*/
        if (string && *string) {
            /*Four email id's present, should be compared with all email id's in duplicate contact */
            /*Merge only if number of email id's in existing contact is less than 4 */
            if ((field == E_CONTACT_EMAIL_1 || field == E_CONTACT_EMAIL_2 
                || field == E_CONTACT_EMAIL_3 || field == E_CONTACT_EMAIL_4) && (num_of_email < 4)) {
                row++;
                str = (char *)e_contact_get_const (lookup->contact, field);
                switch(num_of_email)
                {
                case 0:
                    field = E_CONTACT_EMAIL_1;
                    break;
                case 1:
                    /*New contact has email that is NOT equal to email in duplicate contact*/
                    if((str && *str) && (g_ascii_strcasecmp(e_contact_get_const (lookup->match, E_CONTACT_EMAIL_1),str))) {
                        field = E_CONTACT_EMAIL_2;
                        break;
                    }
                    else/*Either the new contact has no email OR the email already exist in the duplicate contact*/
                        continue;
                case 2:
                    /*New contact has email and it is equal to neither of the 2 emails in the duplicate contact*/
                    if((str && *str) &&  
                            (g_ascii_strcasecmp(str,e_contact_get_const (lookup->match, E_CONTACT_EMAIL_1))) &&
                            (g_ascii_strcasecmp(e_contact_get_const (lookup->match, E_CONTACT_EMAIL_2),str))) {
                        field = E_CONTACT_EMAIL_3;
                        break;
                    }
                    else
                        continue;
                case 3:
                    /*New contact has email and it is equal to none of the 3 emails in the duplicate contact*/
                    if((str && *str) && 
                            (g_ascii_strcasecmp(e_contact_get_const (lookup->match, E_CONTACT_EMAIL_1),str)) && 
                            (g_ascii_strcasecmp(e_contact_get_const (lookup->match, E_CONTACT_EMAIL_2),str)) && 
                            (g_ascii_strcasecmp(e_contact_get_const (lookup->match, E_CONTACT_EMAIL_3),str)))
                        field = E_CONTACT_EMAIL_4;
                    else
                        continue;
                }
                label = gtk_label_new (_("Email"));
                hbox = gtk_hbox_new (FALSE, 0);
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)label, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget *)hbox, 0, 1, row, row + 1);

                dropdown = gtk_combo_box_new_text();    
                gtk_combo_box_append_text (GTK_COMBO_BOX (dropdown), string);

                data = g_new0 (dropdown_data, 1);
                
                gtk_combo_box_append_text (GTK_COMBO_BOX (dropdown), "");

                gtk_combo_box_set_active (GTK_COMBO_BOX (dropdown), 0);
                data->field = field;
                data->match = lookup->match;
                e_contact_set (lookup->match, field, string);
                g_signal_connect (dropdown, "changed", G_CALLBACK(dropdown_changed), data);

                hbox = gtk_hbox_new (FALSE, 0);
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)dropdown, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget *)hbox, 1, 2, row, row + 1);
                gtk_widget_show ((GtkWidget *)dropdown);
                continue;
            }
            if (((field == E_CONTACT_FULL_NAME) && (!g_ascii_strcasecmp(string, string1)))) {
                row++;
                label = gtk_label_new (e_contact_pretty_name(field));
                hbox = gtk_hbox_new (FALSE, 0);
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)label, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget *)hbox, 0, 1, row, row + 1);

                label = gtk_label_new (string);
                hbox = gtk_hbox_new (FALSE, 0);
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)label, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget*)hbox, 1, 2, row, row + 1);
                continue;
            }  

            /*for all string fields except name and email*/
            if(!(string1 && *string1) || (g_ascii_strcasecmp(string, string1))) {
                row++;
                label = gtk_label_new (e_contact_pretty_name(field));
                hbox = gtk_hbox_new (FALSE, 0); 
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)label, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget *)hbox, 0, 1, row, row + 1); 
                data = g_new0 (dropdown_data, 1);
                dropdown = gtk_combo_box_new_text();    
                gtk_combo_box_append_text (GTK_COMBO_BOX (dropdown), string);
                e_contact_set (lookup->match, field, string);

                if (string1 && *string1)
                    gtk_combo_box_append_text (GTK_COMBO_BOX (dropdown), string1);
                else 
                    gtk_combo_box_append_text (GTK_COMBO_BOX (dropdown), "");

                gtk_combo_box_set_active (GTK_COMBO_BOX (dropdown), 0); 
                data->field = field;
                data->match = lookup->match;

                if (field == E_CONTACT_NICKNAME || field == E_CONTACT_GIVEN_NAME)
                    gtk_widget_set_sensitive ((GtkWidget *)dropdown, FALSE);

                g_signal_connect (dropdown, "changed", G_CALLBACK(dropdown_changed), data);
                hbox = gtk_hbox_new (FALSE, 0);
                gtk_box_pack_start (GTK_BOX(hbox), (GtkWidget*)dropdown, FALSE, FALSE, 0);
                gtk_table_attach_defaults (table, (GtkWidget *)hbox, 1, 2, row, row + 1);
                gtk_widget_show_all ((GtkWidget *)dropdown);
            } 
        }
    }

    gtk_window_set_default_size (GTK_WINDOW (dialog), 420, 300);
    gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_window), GTK_WIDGET (table));
    gtk_box_pack_start (GTK_BOX (dialog->vbox), GTK_WIDGET (scrolled_window), TRUE, TRUE, 0); 
    gtk_widget_show (scrolled_window);  
    g_signal_connect (dialog, "map-event", G_CALLBACK (dialog_map), table); 
    gtk_widget_show_all ((GtkWidget *)table);
    gint result = gtk_dialog_run (dialog);

    switch (result)
    {        
    case GTK_RESPONSE_OK:
                 lookup->contact = lookup->match;
             e_book_async_remove_contact (lookup->book, lookup->match, NULL, lookup);
             e_book_async_add_contact (lookup->book, lookup->contact, final_id_cb, lookup);
             value = 1;
             break;
    case GTK_RESPONSE_CANCEL:
                 value = 0;
             break;  
    }
    gtk_widget_destroy (GTK_WIDGET (dialog));
    g_list_free (email_attr_list);
    return value;
}

static gboolean
check_if_same (EContact *contact, EContact *match)
{   
    EContactField field;
    GList *email_attr_list;
    int num_of_email;
    char *str = NULL, *string = NULL, *string1 = NULL;  

    for(field = E_CONTACT_FULL_NAME; field != (E_CONTACT_LAST_SIMPLE_STRING -1) ; field++) {
        email_attr_list = e_contact_get_attributes (match, E_CONTACT_EMAIL);
        num_of_email = g_list_length (email_attr_list);

        if ((field == E_CONTACT_EMAIL_1 || field == E_CONTACT_EMAIL_2 
             || field == E_CONTACT_EMAIL_3 || field == E_CONTACT_EMAIL_4) && (num_of_email<4)) {
            str = (char *)e_contact_get_const (contact, field);
            switch(num_of_email)
            {
            case 0:
                return FALSE;
            case 1:
                if((str && *str) && (g_ascii_strcasecmp(e_contact_get_const (match, E_CONTACT_EMAIL_1),str)))
                    return FALSE;
            case 2:
                if((str && *str) && (g_ascii_strcasecmp(str,e_contact_get_const (match, E_CONTACT_EMAIL_1))) && 
                        (g_ascii_strcasecmp(e_contact_get_const (match, E_CONTACT_EMAIL_2),str)))
                    return FALSE;
            case 3:
                if((str && *str) && (g_ascii_strcasecmp(e_contact_get_const (match, E_CONTACT_EMAIL_1),str)) && 
                        (g_ascii_strcasecmp(e_contact_get_const (match, E_CONTACT_EMAIL_2),str)) &&
                        (g_ascii_strcasecmp(e_contact_get_const (match, E_CONTACT_EMAIL_3),str)))
                    return FALSE;
            }
        }
        else {          
            string = (char *)e_contact_get_const (contact, field);
            string1 = (char *)e_contact_get_const (match, field);
            if ((string && *string) && (string1 && *string1) && (g_ascii_strcasecmp(string1,string)))
                return FALSE;
            /*if the field entry exist in either of the contacts,we'll have to give the choice and thus merge button should be sensitive*/
            else if ((string && *string) && !(string1 && *string1))
                return FALSE;
        }
    }
    g_list_free (email_attr_list);
    return TRUE;
}

static void
response (GtkWidget *dialog, int response, EContactMergingLookup *lookup)
{
    static int merge_response;

    switch (response) {
    case 0:
        doit (lookup);
        break;
    case 1:
        cancelit (lookup);
        break;
    case 2:
        merge_response = mergeit (lookup);
        if (merge_response)
            break;
        return;
    case GTK_RESPONSE_DELETE_EVENT:
        cancelit (lookup);
        break;
    }

    gtk_widget_destroy (dialog);
}

static void
match_query_callback (EContact *contact, EContact *match, EABContactMatchType type, gpointer closure)
{
    EContactMergingLookup *lookup = closure;
    char *gladefile;
    int flag;

    if ((gint) type <= (gint) EAB_CONTACT_MATCH_VAGUE) {
        doit (lookup);
    } else {
        GladeXML *ui;

        GtkWidget *widget, *merge_button;

        lookup->match = g_object_ref (match);
        if (lookup->op == E_CONTACT_MERGING_ADD) {
            /* Compares all the values of contacts and return true, if they match */
            flag = check_if_same (contact, match);
            gladefile = g_build_filename (EVOLUTION_GLADEDIR,
                              "eab-contact-duplicate-detected.glade",
                              NULL);
            ui = glade_xml_new (gladefile, NULL, NULL);
            merge_button = glade_xml_get_widget (ui, "button5");
            /* Merge Button not sensitive when all values are same */
            if (flag)
                gtk_widget_set_sensitive (GTK_WIDGET (merge_button), FALSE);
            g_free (gladefile);
        } else if (lookup->op == E_CONTACT_MERGING_COMMIT) {
            gladefile = g_build_filename (EVOLUTION_GLADEDIR,
                              "eab-contact-commit-duplicate-detected.glade",
                              NULL);
            ui = glade_xml_new (gladefile, NULL, NULL);
            g_free (gladefile);
        } else {
            doit (lookup);
            return;
        }

        widget = glade_xml_get_widget (ui, "custom-old-contact");
        eab_contact_display_render (EAB_CONTACT_DISPLAY (widget),
                        match, EAB_CONTACT_DISPLAY_RENDER_COMPACT);

        widget = glade_xml_get_widget (ui, "custom-new-contact");
        eab_contact_display_render (EAB_CONTACT_DISPLAY (widget),
                        contact, EAB_CONTACT_DISPLAY_RENDER_COMPACT);

        widget = glade_xml_get_widget (ui, "dialog-duplicate-contact");

        gtk_widget_ensure_style (widget);
        gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (widget)->vbox), 0);
        gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (widget)->action_area), 12);

        g_signal_connect (widget, "response",
                  G_CALLBACK (response), lookup);

        gtk_widget_show_all (widget);
    }
}

gboolean
eab_merging_book_add_contact (EBook           *book,
                  EContact        *contact,
                  EBookIdCallback  cb,
                  gpointer         closure)
{
    EContactMergingLookup *lookup;

    lookup = g_new (EContactMergingLookup, 1);

    lookup->op = E_CONTACT_MERGING_ADD;
    lookup->book = g_object_ref (book);
    lookup->contact = g_object_ref (contact);
    lookup->id_cb = cb;
    lookup->closure = closure;
    lookup->avoid = NULL;
    lookup->match = NULL;

    add_lookup (lookup);

    return TRUE;
}

gboolean
eab_merging_book_commit_contact (EBook                 *book,
                 EContact              *contact,
                 EBookCallback          cb,
                 gpointer               closure)
{
    EContactMergingLookup *lookup;

    lookup = g_new (EContactMergingLookup, 1);

    lookup->op = E_CONTACT_MERGING_COMMIT;
    lookup->book = g_object_ref (book);
    lookup->contact = g_object_ref (contact);
    lookup->cb = cb;
    lookup->closure = closure;
    lookup->avoid = g_list_append (NULL, contact);
    lookup->match = NULL;

    add_lookup (lookup);

    return TRUE;
}

GtkWidget *
_eab_contact_merging_create_contact_display(gchar *name,
                        gchar *string1, gchar *string2,
                        gint int1, gint int2);

GtkWidget *
_eab_contact_merging_create_contact_display(gchar *name,
                        gchar *string1, gchar *string2,
                        gint int1, gint int2)
{
    return eab_contact_display_new();
}