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/*
 * 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:
 *      Diego Escalante Urrelo <diegoe@gnome.org>
 *      Bharath Acharya <abharath@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 * Copyright (C) 2008 - Diego Escalante Urrelo
 *
 */

#include <gtk/gtk.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <string.h>

#include <gconf/gconf-client.h>

#include <e-util/e-config.h>

#include <mail/e-mail-folder-utils.h>
#include <mail/e-mail-local.h>
#include <mail/e-mail-reader.h>
#include <mail/e-mail-session.h>
#include <mail/em-composer-utils.h>
#include <mail/em-utils.h>
#include <mail/mail-ops.h>
#include <mail/message-list.h>
#include <e-util/e-alert-dialog.h>
#include <e-util/e-plugin.h>
#include <e-util/e-util.h>
#include <shell/e-shell-view.h>

#include <composer/e-msg-composer.h>

#define GCONF_KEY_TEMPLATE_PLACEHOLDERS "/apps/evolution/mail/template_placeholders"

typedef struct {
    GConfClient *gconf;
    GtkWidget   *treeview;
    GtkWidget   *clue_add;
    GtkWidget   *clue_edit;
    GtkWidget   *clue_remove;
    GtkListStore *store;
} UIData;

enum {
    CLUE_KEYWORD_COLUMN,
    CLUE_VALUE_COLUMN,
    CLUE_N_COLUMNS
};

GtkWidget * e_plugin_lib_get_configure_widget
                        (EPlugin *plugin);
gboolean    init_composer_actions       (GtkUIManager *ui_manager,
                         EMsgComposer *composer);
gboolean    init_shell_actions      (GtkUIManager *ui_manager,
                         EShellWindow *shell_window);
gint        e_plugin_lib_enable     (EPlugin *plugin,
                         gboolean enabled);

/* Thanks to attachment reminder plugin for this*/
static void commit_changes (UIData *ui);

static void  key_cell_edited_callback (GtkCellRendererText *cell, gchar *path_string,
                   gchar *new_text,UIData *ui);

static void  value_cell_edited_callback (GtkCellRendererText *cell, gchar *path_string,
                   gchar *new_text,UIData *ui);

static gboolean clue_foreach_check_isempty (GtkTreeModel *model, GtkTreePath
                    *path, GtkTreeIter *iter, UIData *ui);

static void templates_folder_msg_changed_cb (CamelFolder *folder,
                  CamelFolderChangeInfo *change_info,
                  EShellWindow *shell_window);

static gboolean plugin_enabled;

static void
selection_changed (GtkTreeSelection *selection, UIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_widget_set_sensitive (ui->clue_edit, TRUE);
        gtk_widget_set_sensitive (ui->clue_remove, TRUE);
    } else {
        gtk_widget_set_sensitive (ui->clue_edit, FALSE);
        gtk_widget_set_sensitive (ui->clue_remove, FALSE);
    }
}

static void
destroy_ui_data (gpointer data)
{
    UIData *ui = (UIData *) data;

    if (!ui)
        return;

    g_object_unref (ui->gconf);
    g_free (ui);
}

static void
commit_changes (UIData *ui)
{
    GtkTreeModel *model = NULL;
    GSList *clue_list = NULL;
    GtkTreeIter iter;
    gboolean valid;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    valid = gtk_tree_model_get_iter_first (model, &iter);

    while (valid) {
        gchar *keyword, *value;
        gchar *key;

        gtk_tree_model_get (model, &iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
        gtk_tree_model_get (model, &iter, CLUE_VALUE_COLUMN, &value, -1);

        /* Check if the keyword and value are not empty */
        if ((keyword) && (value) && (g_utf8_strlen (g_strstrip (keyword), -1) > 0)
            && (g_utf8_strlen (g_strstrip (value), -1) > 0)) {
            key = g_strdup_printf("%s=%s", keyword, value);
            clue_list = g_slist_append (clue_list, key);
        }
        valid = gtk_tree_model_iter_next (model, &iter);
    }

    gconf_client_set_list (ui->gconf, GCONF_KEY_TEMPLATE_PLACEHOLDERS, GCONF_VALUE_STRING, clue_list, NULL);

    g_slist_foreach (clue_list, (GFunc) g_free, NULL);
    g_slist_free (clue_list);
}

static void
clue_check_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, UIData *ui)
{
    GtkTreeSelection *selection;
    gchar *keyword = NULL;
    gboolean valid;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    /* move to the previous node */
    valid = gtk_tree_path_prev (path);

    gtk_tree_model_get (model, iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
    if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
        gtk_list_store_remove (ui->store, iter);

    /* Check if we have a valid row to select. If not, then select
     * the previous row */
    if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (model), iter)) {
        gtk_tree_selection_select_iter (selection, iter);
    } else {
        if (path && valid) {
            gtk_tree_model_get_iter (model, iter, path);
            gtk_tree_selection_select_iter (selection, iter);
        }
    }

    gtk_widget_grab_focus (ui->treeview);
    g_free (keyword);
}

static gboolean
clue_foreach_check_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, UIData *ui)
{
    gboolean valid;

    valid = gtk_tree_model_get_iter_first (model, iter);
    while (valid && gtk_list_store_iter_is_valid (ui->store, iter)) {
        gchar *keyword = NULL;
        gtk_tree_model_get (model, iter, CLUE_KEYWORD_COLUMN, &keyword, -1);
        /* Check if the keyword is not empty and then emit the row-changed
        signal (if we delete the row, then the iter gets corrupted) */
        if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
            gtk_tree_model_row_changed (model, path, iter);

        g_free (keyword);
        valid = gtk_tree_model_iter_next (model, iter);
    }

    return FALSE;
}

static void
key_cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              UIData             *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *value;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_tree_model_get (model, &iter, CLUE_VALUE_COLUMN, &value, -1);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, new_text, CLUE_VALUE_COLUMN, value, -1);

    commit_changes (ui);
}

static void
value_cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              UIData             *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *keyword;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_tree_model_get (model, &iter, CLUE_KEYWORD_COLUMN, &keyword, -1);

    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, keyword, CLUE_VALUE_COLUMN, new_text, -1);

    commit_changes (ui);
}

static void
clue_add_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    gchar *new_clue = NULL;
    GtkTreeViewColumn *focus_col;
    GtkTreePath *path;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    gtk_tree_model_foreach (model, (GtkTreeModelForeachFunc) clue_foreach_check_isempty, ui);

    /* Disconnect from signal so that we can create an empty row */
    g_signal_handlers_disconnect_matched (G_OBJECT (model), G_SIGNAL_MATCH_FUNC, 0, 0, NULL, clue_check_isempty, ui);

    /* TODO : Trim and check for blank strings */
    new_clue = g_strdup ("");
    gtk_list_store_append (GTK_LIST_STORE (model), &iter);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    CLUE_KEYWORD_COLUMN, new_clue, CLUE_VALUE_COLUMN, new_clue, -1);

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (ui->treeview), CLUE_KEYWORD_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (ui->treeview), path, focus_col, TRUE);
        gtk_tree_view_row_activated (GTK_TREE_VIEW (ui->treeview), path, focus_col);
        gtk_tree_path_free (path);
    }

    /* We have done our job, connect back to the signal */
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(clue_check_isempty), ui);
}

static void
clue_remove_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkTreePath *path;
    gboolean valid;
    gint len;

    valid = FALSE;
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    /* Get the path and move to the previous node :) */
    path = gtk_tree_model_get_path (model, &iter);
    if (path)
        valid = gtk_tree_path_prev (path);

    gtk_list_store_remove (GTK_LIST_STORE (model), &iter);

    len = gtk_tree_model_iter_n_children (model, NULL);
    if (len > 0) {
        if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (model), &iter)) {
            gtk_tree_selection_select_iter (selection, &iter);
        } else {
            if (path && valid) {
                gtk_tree_model_get_iter (model, &iter, path);
                gtk_tree_selection_select_iter (selection, &iter);
            }
        }
    } else {
        gtk_widget_set_sensitive (ui->clue_edit, FALSE);
        gtk_widget_set_sensitive (ui->clue_remove, FALSE);
    }

    gtk_widget_grab_focus (ui->treeview);
    gtk_tree_path_free (path);

    commit_changes (ui);
}

static void
clue_edit_clicked (GtkButton *button, UIData *ui)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    GtkTreeViewColumn *focus_col;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (ui->treeview), CLUE_KEYWORD_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (ui->treeview), path, focus_col, TRUE);
        gtk_tree_path_free (path);
    }
}

GtkWidget *
e_plugin_lib_get_configure_widget (EPlugin *epl)
{
    GtkCellRenderer *renderer_key, *renderer_value;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    GConfClient *gconf = gconf_client_get_default ();
    GtkWidget *hbox;
    GSList *clue_list = NULL, *list;
    GtkTreeModel *model;
    GtkWidget *templates_configuration_box;
    GtkWidget *clue_container;
    GtkWidget *scrolledwindow1;
    GtkWidget *clue_treeview;
    GtkWidget *vbuttonbox2;
    GtkWidget *clue_add;
    GtkWidget *clue_edit;
    GtkWidget *clue_remove;

    UIData *ui = g_new0 (UIData, 1);

    templates_configuration_box = gtk_vbox_new (FALSE, 5);
    gtk_widget_show (templates_configuration_box);
    gtk_widget_set_size_request (templates_configuration_box, 385, 189);

    clue_container = gtk_hbox_new (FALSE, 6);
    gtk_widget_show (clue_container);
    gtk_box_pack_start (GTK_BOX (templates_configuration_box), clue_container, TRUE, TRUE, 0);

    scrolledwindow1 = gtk_scrolled_window_new (NULL, NULL);
    gtk_widget_show (scrolledwindow1);
    gtk_box_pack_start (GTK_BOX (clue_container), scrolledwindow1, TRUE, TRUE, 0);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow1), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    clue_treeview = gtk_tree_view_new ();
    gtk_widget_show (clue_treeview);
    gtk_container_add (GTK_CONTAINER (scrolledwindow1), clue_treeview);
    gtk_container_set_border_width (GTK_CONTAINER (clue_treeview), 1);

    vbuttonbox2 = gtk_vbutton_box_new ();
    gtk_widget_show (vbuttonbox2);
    gtk_box_pack_start (GTK_BOX (clue_container), vbuttonbox2, FALSE, TRUE, 0);
    gtk_button_box_set_layout (GTK_BUTTON_BOX (vbuttonbox2), GTK_BUTTONBOX_START);
    gtk_box_set_spacing (GTK_BOX (vbuttonbox2), 6);

    clue_add = gtk_button_new_from_stock ("gtk-add");
    gtk_widget_show (clue_add);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_add);
    gtk_widget_set_can_default (clue_add, TRUE);

    clue_edit = gtk_button_new_from_stock ("gtk-edit");
    gtk_widget_show (clue_edit);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_edit);
    gtk_widget_set_can_default (clue_edit, TRUE);

    clue_remove = gtk_button_new_from_stock ("gtk-remove");
    gtk_widget_show (clue_remove);
    gtk_container_add (GTK_CONTAINER (vbuttonbox2), clue_remove);
    gtk_widget_set_can_default (clue_remove, TRUE);

    ui->gconf = gconf_client_get_default ();

    ui->treeview = clue_treeview;

    ui->store = gtk_list_store_new (CLUE_N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING);

    gtk_tree_view_set_model (GTK_TREE_VIEW (ui->treeview), GTK_TREE_MODEL (ui->store));

    renderer_key = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Keywords"),
            renderer_key, "text", CLUE_KEYWORD_COLUMN, NULL);
    g_object_set (G_OBJECT (renderer_key), "editable", TRUE, NULL);
    g_signal_connect(renderer_key, "edited", (GCallback) key_cell_edited_callback, ui);

    renderer_value = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Values"),
            renderer_value, "text", CLUE_VALUE_COLUMN, NULL);
    g_object_set (G_OBJECT (renderer_value), "editable", TRUE, NULL);
    g_signal_connect(renderer_value, "edited", (GCallback) value_cell_edited_callback, ui);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
    g_signal_connect (G_OBJECT (selection), "changed", G_CALLBACK (selection_changed), ui);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (ui->treeview), TRUE);

    ui->clue_add = clue_add;
    g_signal_connect (G_OBJECT (ui->clue_add), "clicked", G_CALLBACK (clue_add_clicked), ui);

    ui->clue_remove = clue_remove;
    g_signal_connect (G_OBJECT (ui->clue_remove), "clicked", G_CALLBACK (clue_remove_clicked), ui);
    gtk_widget_set_sensitive (ui->clue_remove, FALSE);

    ui->clue_edit = clue_edit;
    g_signal_connect (G_OBJECT (ui->clue_edit), "clicked", G_CALLBACK (clue_edit_clicked), ui);
    gtk_widget_set_sensitive (ui->clue_edit, FALSE);

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(clue_check_isempty), ui);

    /* Populate tree view with values from gconf */
    clue_list = gconf_client_get_list ( gconf, GCONF_KEY_TEMPLATE_PLACEHOLDERS, GCONF_VALUE_STRING, NULL );

    for (list = clue_list; list; list = g_slist_next (list)) {
        gchar **temp = g_strsplit (list->data, "=", 2);
        gtk_list_store_append (ui->store, &iter);
        gtk_list_store_set (ui->store, &iter, CLUE_KEYWORD_COLUMN, temp[0], CLUE_VALUE_COLUMN, temp[1], -1);
        g_strfreev (temp);
    }

    if (clue_list) {
        g_slist_foreach (clue_list, (GFunc) g_free, NULL);
        g_slist_free (clue_list);
    }

    /* Add the list here */

    hbox = gtk_vbox_new (FALSE, 0);

    gtk_box_pack_start (GTK_BOX (hbox), templates_configuration_box, TRUE, TRUE, 0);

    /* to let free data properly on destroy of configuration widget */
    g_object_set_data_full (G_OBJECT (hbox), "myui-data", ui, destroy_ui_data);

    return hbox;
}

/* Case insensitive version of strstr */
static gchar *
strstr_nocase (const gchar * haystack, const gchar *needle)
{
/* When _GNU_SOURCE is available, use the nonstandard extension of libc */
#ifdef _GNU_SOURCE
    g_return_val_if_fail (haystack, NULL);
    g_return_Val_if_fail (needle, NULL);

    return strcasestr (haystack, needle)
#else
/* Otherwise convert both, haystack and needle to lowercase and use good old strstr */
    gchar *l_haystack;
    gchar *l_needle;
    gchar *pos;

    g_return_val_if_fail (haystack, NULL);
    g_return_val_if_fail (needle, NULL);

    l_haystack = g_ascii_strdown (haystack, -1);
    l_needle = g_ascii_strdown (needle, -1);
    pos = strstr (l_haystack, l_needle);

    /* Get actual position of the needle in the haystack instead of l_haystack or
       leave it NULL */
    if (pos)
        pos = (gchar *)(haystack + (pos - l_haystack));

    g_free (l_haystack);
    g_free (l_needle);

    return pos;
#endif
}

/* Replaces $ORIG[variable] in given template by given replacement from the original message */
static void
replace_template_variable (GString *text, const gchar *variable, const gchar *replacement)
{
    const gchar *p, *next;
    GString *str;
    gint find_len;
    gchar *find;

    g_return_if_fail (text != NULL);
    g_return_if_fail (variable != NULL);
    g_return_if_fail (*variable);

    find = g_strconcat ("$ORIG[", variable, "]", NULL);

    find_len = strlen (find);
    str = g_string_new ("");
    p = text->str;
    while (next = strstr_nocase (p, find), next) {
        if (p < next)
            g_string_append_len (str, p, next - p);
        if (replacement && *replacement)
            g_string_append (str, replacement);
        p = next + find_len;
    }
    g_string_append (str, p);

    g_string_assign (text, str->str);

    g_string_free (str, TRUE);
    g_free (find);
}

static void
replace_email_addresses (GString *template, CamelInternetAddress *internet_address, const gchar *variable)
{
    gint address_index = 0;
    GString *emails = g_string_new ("");
    const gchar *address_name, *address_email;

    g_return_if_fail (template);
    g_return_if_fail (internet_address);
    g_return_if_fail (variable);

    while (camel_internet_address_get (internet_address, address_index, &address_name, &address_email)) {
        gchar *address = camel_internet_address_format_address (address_name, address_email);

        if (address_index > 0)
            g_string_append_printf (emails, ", %s", address);
        else
            g_string_append_printf (emails, "%s", address);

        address_index++;
        g_free (address);
    }
    replace_template_variable (template, variable, emails->str);
    g_string_free (emails, TRUE);
}

static CamelMimePart*
fill_template (CamelMimeMessage *message, CamelMimePart *template)
{
    struct _camel_header_raw *header;
    CamelContentType *ct;
    CamelStream *stream;
    CamelMimePart *return_part;
    CamelMimePart *message_part = NULL;
    CamelDataWrapper *dw;

    CamelInternetAddress *internet_address;

    GString *template_body;
    GByteArray *byte_array;

    gint i;
    gboolean message_html, template_html;

    ct = camel_mime_part_get_content_type (template);
    template_html = ct && camel_content_type_is (ct, "text", "html");

    message_html = FALSE;
    /* When template is html, then prefer HTML part of the original message. Otherwise go for plaintext */
    dw = camel_medium_get_content (CAMEL_MEDIUM (message));
    if (CAMEL_IS_MULTIPART (dw)) {
        CamelMultipart *multipart = CAMEL_MULTIPART (dw);

        for (i = 0; i < camel_multipart_get_number (multipart); i++) {
            CamelMimePart *part = camel_multipart_get_part (multipart, i);
            CamelContentType *ct = camel_mime_part_get_content_type (part);

            if (!ct)
                continue;

            if (camel_content_type_is (ct, "text", "html") && template_html) {
                message_part = camel_multipart_get_part (multipart, i);
                message_html = TRUE;
                break;
            } else if (camel_content_type_is (ct, "text", "plain") && message_html == FALSE) {
                message_part = camel_multipart_get_part (multipart, i);
            }
        }
     } else
        message_part  = CAMEL_MIME_PART (message);

    /* Get content of the template */
    stream = camel_stream_mem_new ();
    camel_data_wrapper_decode_to_stream_sync (camel_medium_get_content (CAMEL_MEDIUM (template)), stream, NULL, NULL);
    camel_stream_flush (stream, NULL, NULL);
    byte_array = camel_stream_mem_get_byte_array (CAMEL_STREAM_MEM (stream));
    template_body = g_string_new_len ((gchar *) byte_array->data, byte_array->len);
    g_object_unref (stream);

    /* Replace all $ORIG[header_name] by respective values */
    header = CAMEL_MIME_PART (message)->headers;
    while (header) {
        if (g_ascii_strncasecmp (header->name, "content-", 8) != 0 &&
            g_ascii_strncasecmp (header->name, "to", 2) != 0 &&
            g_ascii_strncasecmp (header->name, "cc", 2) != 0 &&
            g_ascii_strncasecmp (header->name, "bcc", 3) != 0 &&
            g_ascii_strncasecmp (header->name, "from", 4) != 0 &&
            g_ascii_strncasecmp (header->name, "subject", 7) != 0)
            replace_template_variable (template_body, header->name, header->value);

        header = header->next;
    }

    /* Now manually replace the *subject* header. The header->value for subject header could be
       base64 encoded, so let camel_mime_message to decode it for us if needed */
    replace_template_variable (template_body, "subject", camel_mime_message_get_subject (message));

    /* Replace TO and FROM modifiers. */
    internet_address = camel_mime_message_get_recipients (message, CAMEL_RECIPIENT_TYPE_TO);
    replace_email_addresses (template_body, internet_address, "to");

    internet_address = camel_mime_message_get_recipients (message, CAMEL_RECIPIENT_TYPE_CC);
    replace_email_addresses (template_body, internet_address, "cc");

    internet_address = camel_mime_message_get_recipients (message, CAMEL_RECIPIENT_TYPE_BCC);
    replace_email_addresses (template_body, internet_address, "bcc");

    internet_address = camel_mime_message_get_from (message);
    replace_email_addresses (template_body, internet_address, "from");

    /* Now extract body of the original message and replace the $ORIG[body] modifier in template */
    if (message_part && strstr_nocase (template_body->str, "$ORIG[body]")) {
        GString *message_body;

        stream = camel_stream_mem_new ();
        camel_data_wrapper_decode_to_stream_sync (camel_medium_get_content (CAMEL_MEDIUM (message_part)), stream, NULL, NULL);
        camel_stream_flush (stream, NULL, NULL);
        byte_array = camel_stream_mem_get_byte_array (CAMEL_STREAM_MEM (stream));
        message_body = g_string_new_len ((gchar *) byte_array->data, byte_array->len);
        g_object_unref (stream);

        if (template_html && !message_html) {
            gchar *html = camel_text_to_html (message_body->str, CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
                                         CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES |
                                         CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS |
                                         CAMEL_MIME_FILTER_TOHTML_MARK_CITATION |
                                         CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES, 0);
            g_string_assign (message_body, html);
            g_free (html);
        } else if (!template_html && message_html) {
            g_string_prepend (message_body, "<pre>");
            g_string_append (message_body, "</pre>");
        } /* Other cases should not occur. And even if they happen to do, there's nothing we can really do about it */

        replace_template_variable (template_body, "body", message_body->str);
        g_string_free (message_body, TRUE);
    } else {
        replace_template_variable (template_body, "body", "");
    }

    return_part = camel_mime_part_new ();

    if (template_html)
        camel_mime_part_set_content (return_part, template_body->str, template_body->len, "text/html");
    else
        camel_mime_part_set_content (return_part, template_body->str, template_body->len, "text/plain");

    g_string_free (template_body, TRUE);

    return return_part;
}

static void
create_new_message (CamelFolder *folder, const gchar *uid, CamelMimeMessage *message, gpointer data)
{
    CamelMimeMessage *new;
    CamelMimeMessage *template = CAMEL_MIME_MESSAGE (data);
    CamelMultipart *new_multipart;
    CamelContentType *new_content_type = NULL;
    CamelDataWrapper *dw;
    struct _camel_header_raw *header;
    EShell *shell;
    gint i;

    CamelMimePart *template_part = NULL;
    CamelMimePart *out_part = NULL;

    g_return_if_fail (template != NULL);
    g_return_if_fail (message != NULL);

    /* FIXME Pass this in somehow. */
    shell = e_shell_get_default ();

    folder = e_mail_local_get_folder (E_MAIL_LOCAL_FOLDER_TEMPLATES);

    new = camel_mime_message_new ();
    new_multipart = camel_multipart_new ();
    camel_data_wrapper_set_mime_type (CAMEL_DATA_WRAPPER (new_multipart), "multipart/alternative");
    camel_multipart_set_boundary (new_multipart, NULL);

    dw = camel_medium_get_content (CAMEL_MEDIUM (template));
    /* If template is a multipart, then try to use HTML. When no HTML part is available, use plaintext. Every other
       add as an attachment */
    if (CAMEL_IS_MULTIPART (dw)) {
        for (i = 0; i < camel_multipart_get_number (CAMEL_MULTIPART (dw)); i++) {
            CamelMimePart *part = camel_multipart_get_part (CAMEL_MULTIPART (dw), i);
            CamelContentType *ct = camel_mime_part_get_content_type (part);

            if (ct && camel_content_type_is (ct, "text", "html")) {
                new_content_type = ct;
                template_part = camel_multipart_get_part (CAMEL_MULTIPART (dw), i);
            } else if (ct && camel_content_type_is (ct, "text", "plain") && new_content_type == NULL) {
                new_content_type = ct;
                template_part = camel_multipart_get_part (CAMEL_MULTIPART (dw), i);
            } else {
                /* Copy any other parts (attachments...) to the output message */
                camel_mime_part_set_disposition (part, "attachment");
                camel_multipart_add_part (new_multipart, part);
            }
        }
    } else {
        CamelContentType *ct = camel_mime_part_get_content_type (CAMEL_MIME_PART (template));

        if (ct && (camel_content_type_is (ct, "text", "html") ||
            camel_content_type_is (ct, "text", "plain"))) {
            template_part = CAMEL_MIME_PART (template);
            new_content_type = ct;
        }
    }

    /* Here replace all the modifiers in template body by values from message and return the newly created part */
    out_part = fill_template (message, template_part);

    /* Assigning part directly to mime_message causes problem with "Content-type" header displaying
       in the HTML message (camel parsing bug?) */
    camel_multipart_add_part (new_multipart, out_part);
    g_object_unref (out_part);
    camel_medium_set_content (CAMEL_MEDIUM (new), CAMEL_DATA_WRAPPER (new_multipart));

    /* Add the headers from the message we are replying to, so CC and that
       stuff is preserved. Also replace any $ORIG[header-name] modifiers ignoring
       'content-*' headers */
    header = CAMEL_MIME_PART (message)->headers;
    while (header) {
        if (g_ascii_strncasecmp (header->name, "content-", 8) != 0) {

            /* Some special handling of the 'subject' header */
            if (g_ascii_strncasecmp (header->name, "subject", 7) == 0) {
                GString *subject = g_string_new (camel_mime_message_get_subject (template));

                /* Now replace all possible $ORIG[]s in the subject line by values from original message */
                struct _camel_header_raw *m_header = CAMEL_MIME_PART (message)->headers;
                while (m_header) {
                    if (g_ascii_strncasecmp (m_header->name, "content-", 8) != 0 &&
                        g_ascii_strncasecmp (m_header->name, "subject", 7) !=0)
                        replace_template_variable (subject, m_header->name, m_header->value);

                    m_header = m_header->next;
                }
                /* Now replace $ORIG[subject] variable, handling possible base64 encryption */
                replace_template_variable (subject, "subject",
                    camel_mime_message_get_subject (message));
                header->value = g_strdup (subject->str);
                g_string_free (subject, TRUE);
            }

            camel_medium_add_header (CAMEL_MEDIUM (new),
                         header->name,
                         header->value);
        }

        header = header->next;
    }

    /* Set the To: field to the same To: field of the message we are replying to. */
    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_TO,
            camel_mime_message_get_from (message));

    /* Copy the CC and BCC from the template.*/
    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_CC,
            camel_mime_message_get_recipients (template, CAMEL_RECIPIENT_TYPE_CC));

    camel_mime_message_set_recipients (new, CAMEL_RECIPIENT_TYPE_BCC,
            camel_mime_message_get_recipients (template, CAMEL_RECIPIENT_TYPE_BCC));

    /* Create the composer */
    em_utils_edit_message (shell, folder, new, uid);

    g_object_unref (template);
    g_object_unref (new_multipart);
    g_object_unref (new);
}

static void
action_reply_with_template_cb (GtkAction *action,
                               EShellView *shell_view)
{
    CamelFolder *folder, *template_folder;
    EShellContent *shell_content;
    CamelMimeMessage *template;
    EMailReader *reader;
    GPtrArray *uids;
    const gchar *message_uid;
    const gchar *template_uid;

    shell_content = e_shell_view_get_shell_content (shell_view);
    reader = E_MAIL_READER (shell_content);

    folder = e_mail_reader_get_folder (reader);
    g_return_if_fail (CAMEL_IS_FOLDER (folder));

    uids = e_mail_reader_get_selected_uids (reader);
    g_return_if_fail (uids != NULL && uids->len == 1);
    message_uid = g_ptr_array_index (uids, 0);

    g_object_ref (action);

    template_folder = g_object_get_data (
        G_OBJECT (action), "template-folder");
    template_uid = g_object_get_data (
        G_OBJECT (action), "template-uid");

    /* FIXME This blocks. */
    template = camel_folder_get_message_sync (
        template_folder, template_uid, NULL, NULL);

    mail_get_message (
        folder, message_uid, create_new_message,
        (gpointer) template, mail_msg_unordered_push);

    g_object_unref (action);

    em_utils_uids_free (uids);
}

static void
build_template_menus_recurse (GtkUIManager *ui_manager,
                              GtkActionGroup *action_group,
                              const gchar *menu_path,
                              guint *action_count,
                              guint merge_id,
                              CamelFolderInfo *folder_info,
                              EShellView *shell_view)
{
    CamelStore *store;
    EShellWindow *shell_window = e_shell_view_get_shell_window (shell_view);

    store = e_mail_local_get_store ();

    while (folder_info != NULL) {
        CamelFolder *folder;
        GPtrArray *uids;
        GtkAction *action;
        const gchar *action_label;
        const gchar *display_name;
        gchar *action_name;
        gchar *path;
        guint ii;

        display_name = folder_info->display_name;
        /* FIXME Not passing a GCancellable or GError here. */
        folder = camel_store_get_folder_sync (
            store, folder_info->full_name, 0, NULL, NULL);

        action_name = g_strdup_printf (
            "templates-menu-%d", *action_count);
        *action_count = *action_count + 1;

        /* To avoid having a Templates dir, we ignore the top level */
        if (g_str_has_suffix (display_name, "Templates"))
            action_label = _("Templates");
        else
            action_label = display_name;

        action = gtk_action_new (
            action_name, action_label, NULL, NULL);

        gtk_action_group_add_action (action_group, action);

        gtk_ui_manager_add_ui (
            ui_manager, merge_id, menu_path, action_name,
            action_name, GTK_UI_MANAGER_MENU, FALSE);

        /* Disconnect previous connection to avoid possible multiple calls because
           folder is a persistent structure */
        g_signal_handlers_disconnect_by_func (folder, G_CALLBACK (templates_folder_msg_changed_cb), shell_window);
        g_signal_connect (folder, "changed",
            G_CALLBACK (templates_folder_msg_changed_cb), shell_window);

        path = g_strdup_printf ("%s/%s", menu_path, action_name);

        g_object_unref (action);
        g_free (action_name);

        /* Add submenus, if any. */
        if (folder_info->child != NULL)
            build_template_menus_recurse (
                ui_manager, action_group,
                path, action_count, merge_id,
                folder_info->child, shell_view);

        if (!folder) {
            g_free (path);
            folder_info = folder_info->next;
            continue;
        }

        /* Get the UIDs for this folder and add them to the menu. */
        uids = camel_folder_get_uids (folder);
        for (ii = 0; uids && ii < uids->len; ii++) {
            CamelMimeMessage *template;
            const gchar *uid = uids->pdata[ii];
            guint32 flags;

            /* If the UIDs is marked for deletion, skip it. */
            flags = camel_folder_get_message_flags (folder, uid);
            if (flags & CAMEL_MESSAGE_DELETED)
                continue;

            /* FIXME Not passing a GCancellable or GError here. */
            template = camel_folder_get_message_sync (
                folder, uid, NULL, NULL);

            /* FIXME Do something more intelligent with errors. */
            if (template == NULL)
                continue;

            action_label =
                camel_mime_message_get_subject (template);
            if (action_label == NULL || *action_label == '\0')
                action_label = _("No Title");

            action_name = g_strdup_printf (
                "templates-item-%d", *action_count);
            *action_count = *action_count + 1;

            action = gtk_action_new (
                action_name, action_label, NULL, NULL);

            g_object_set_data(G_OBJECT (action), "template-uid", (gpointer) uid);

            g_object_set_data(G_OBJECT (action), "template-folder", folder);

            g_signal_connect (
                action, "activate",
                G_CALLBACK (action_reply_with_template_cb),
                shell_view);

            gtk_action_group_add_action (action_group, action);

            gtk_ui_manager_add_ui (
                ui_manager, merge_id, path, action_name,
                action_name, GTK_UI_MANAGER_MENUITEM, FALSE);

            g_object_unref (action);
            g_free (action_name);
            g_object_unref (template);
        }

        camel_folder_free_uids (folder, uids);
        g_object_unref (folder);
        g_free (path);

        folder_info = folder_info->next;
    }
}

static void
got_message_draft_cb (EMsgComposer *composer,
                      GAsyncResult *result)
{
    CamelMimeMessage *message;
    CamelMessageInfo *info;
    CamelFolder *folder;
    GError *error = NULL;

    message = e_msg_composer_get_message_draft_finish (
        composer, result, &error);

    /* Ignore cancellations. */
    if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
        g_warn_if_fail (message == NULL);
        g_error_free (error);
        return;
    }

    if (error != NULL) {
        g_warn_if_fail (message == NULL);
        e_alert_run_dialog_for_args (
            GTK_WINDOW (composer),
            "mail-composer:no-build-message",
            error->message, NULL);
        g_error_free (error);
        return;
    }

    g_return_if_fail (CAMEL_IS_MIME_MESSAGE (message));

    /* Get the templates folder and all UIDs of the messages there. */
    folder = e_mail_local_get_folder (E_MAIL_LOCAL_FOLDER_TEMPLATES);

    info = camel_message_info_new (NULL);

    /* The last argument is a bit mask which tells the function
     * which flags to modify.  In this case, ~0 means all flags.
     * So it clears all the flags and then sets SEEN and DRAFT. */
    camel_message_info_set_flags (
        info, CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DRAFT, ~0);

    /* FIXME No async callback, so... hope for the best? */
    e_mail_folder_append_message (
        folder, message, info, G_PRIORITY_DEFAULT,
        NULL, (GAsyncReadyCallback) NULL, NULL);

    g_object_unref (message);
}

static void
action_template_cb (GtkAction *action,
                    EMsgComposer *composer)
{
    /* XXX Pass a GCancellable */
    e_msg_composer_get_message_draft (
        composer, G_PRIORITY_DEFAULT, NULL,
        (GAsyncReadyCallback) got_message_draft_cb, NULL);
}

static GtkActionEntry composer_entries[] = {

    { "template",
      GTK_STOCK_SAVE,
      N_("Save as _Template"),
      "<Shift><Control>t",
      N_("Save as Template"),
      G_CALLBACK (action_template_cb) }
};

static void
build_menu (EShellWindow *shell_window,
        GtkActionGroup *action_group)
{
    EShellView *shell_view;
    CamelFolder *folder;
    CamelStore *store;
    CamelFolderInfo *folder_info;
    GtkUIManager *ui_manager;
    guint merge_id;
    guint action_count = 0;
    const gchar *full_name;

    ui_manager = e_shell_window_get_ui_manager (shell_window);
    shell_view = e_shell_window_get_shell_view (shell_window, "mail");

    merge_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (action_group), "merge-id"));

    /* Now recursively build template submenus in the pop-up menu. */
    store = e_mail_local_get_store ();
    folder = e_mail_local_get_folder (
        E_MAIL_LOCAL_FOLDER_TEMPLATES);
    full_name = camel_folder_get_full_name (folder);

    /* FIXME Not passing a GCancellable or GError here. */
    folder_info = camel_store_get_folder_info_sync (
        store, full_name,
        CAMEL_STORE_FOLDER_INFO_RECURSIVE |
        CAMEL_STORE_FOLDER_INFO_FAST, NULL, NULL);

    build_template_menus_recurse (
        ui_manager, action_group,
        "/mail-message-popup/mail-message-templates",
        &action_count, merge_id, folder_info,
        shell_view);

    camel_store_free_folder_info (store, folder_info);
}

static void
update_actions_cb (EShellView *shell_view, GtkActionGroup *action_group)
{
    GList *list;
    gint length;

    if (!plugin_enabled)
        return;

    list = gtk_action_group_list_actions (action_group);
    length = g_list_length (list);

    if (!length) {
        EShellWindow *shell_window  = e_shell_view_get_shell_window (shell_view);
        build_menu (shell_window, action_group);
    }

    gtk_action_group_set_sensitive (action_group, TRUE);
    gtk_action_group_set_visible (action_group, TRUE);

    g_list_free (list);
}

gboolean
init_composer_actions (GtkUIManager *ui_manager,
                       EMsgComposer *composer)
{
    GtkhtmlEditor *editor;

    editor = GTKHTML_EDITOR (composer);

    /* Add actions to the "composer" action group. */
    gtk_action_group_add_actions (
        gtkhtml_editor_get_action_group (editor, "composer"),
        composer_entries, G_N_ELEMENTS (composer_entries), composer);

    return TRUE;
}

static void
rebuild_template_menu (EShellWindow *shell_window)
{
    GtkUIManager *ui_manager;
    GtkActionGroup *action_group;
    guint merge_id;

    ui_manager = e_shell_window_get_ui_manager (shell_window);

    action_group = e_lookup_action_group (ui_manager, "templates");
    merge_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (action_group), "merge-id"));

    gtk_ui_manager_remove_ui (ui_manager, merge_id);
    e_action_group_remove_all_actions (action_group);
    gtk_ui_manager_ensure_update (ui_manager);

    build_menu (shell_window, action_group);
}

static void
templates_folder_msg_changed_cb (CamelFolder *folder,
                 CamelFolderChangeInfo *change_info,
                 EShellWindow *shell_window)
{
    rebuild_template_menu (shell_window);
}

static void
templates_folder_changed_cb (CamelStore *store,
                 CamelFolderInfo *folder_info,
                 EShellWindow *shell_window)
{
    if (folder_info->full_name && strstr (folder_info->full_name, _("Templates")) != NULL)
        rebuild_template_menu (shell_window);
}

static void
templates_folder_renamed_cb (CamelStore *store,
                 const gchar *old_name,
                 CamelFolderInfo *folder_info,
                 EShellWindow *shell_window)
{
    if (folder_info->full_name && strstr (folder_info->full_name, _("Templates")) != NULL)
        rebuild_template_menu (shell_window);
}

static void
mail_shell_view_created_cb (EShellWindow *shell_window,
                            EShellView *shell_view)
{
    GtkUIManager *ui_manager;
    GtkActionGroup *action_group;
    CamelFolder *folder;
    CamelStore *store;
    guint merge_id;

    ui_manager = e_shell_window_get_ui_manager (shell_window);
    e_shell_window_add_action_group (shell_window, "templates");
    action_group = e_lookup_action_group (ui_manager, "templates");
    merge_id = gtk_ui_manager_new_merge_id (ui_manager);
    g_object_set_data (G_OBJECT (action_group), "merge-id",
               GUINT_TO_POINTER (merge_id));

    folder = e_mail_local_get_folder (E_MAIL_LOCAL_FOLDER_TEMPLATES);
    store = e_mail_local_get_store ();

    g_signal_connect (folder, "changed",
        G_CALLBACK (templates_folder_msg_changed_cb), shell_window);
    g_signal_connect (store, "folder-created",
        G_CALLBACK (templates_folder_changed_cb), shell_window);
    g_signal_connect (store, "folder-deleted",
        G_CALLBACK (templates_folder_changed_cb), shell_window);
    g_signal_connect (store, "folder-renamed",
        G_CALLBACK (templates_folder_renamed_cb), shell_window);

    g_signal_connect (shell_view, "update-actions",
        G_CALLBACK (update_actions_cb), action_group);
}

gboolean
init_shell_actions (GtkUIManager *ui_manager,
                    EShellWindow *shell_window)
{
    EShellView *shell_view;

    /* Be careful not to instantiate the mail view ourselves. */
    shell_view = e_shell_window_peek_shell_view (shell_window, "mail");
    if (shell_view != NULL)
        mail_shell_view_created_cb (shell_window, shell_view);
    else
        g_signal_connect (
            shell_window, "shell-view-created::mail",
            G_CALLBACK (mail_shell_view_created_cb), NULL);

    return TRUE;
}

gint
e_plugin_lib_enable (EPlugin *plugin,
                     gboolean enabled)
{
    plugin_enabled = enabled;

    return 0;
}