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profanity/src/xmpp/form.c

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/*
* form.c
*
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* Copyright (C) 2012 - 2015 James Booth <boothj5@gmail.com>
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*
* This file is part of Profanity.
*
* Profanity is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Profanity is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Profanity. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give permission to
* link the code of portions of this program with the OpenSSL library under
* certain conditions as described in each individual source file, and
* distribute linked combinations including the two.
*
* You must obey the GNU General Public License in all respects for all of the
* code used other than OpenSSL. If you modify file(s) with this exception, you
* may extend this exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this exception
* statement from your version. If you delete this exception statement from all
* source files in the program, then also delete it here.
*
*/
#include "config.h"
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#include <string.h>
#include <stdlib.h>
#ifdef HAVE_LIBMESODE
#include <mesode.h>
#endif
#ifdef HAVE_LIBSTROPHE
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#include <strophe.h>
#endif
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#include <glib.h>
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#include "log.h"
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#include "xmpp/xmpp.h"
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#include "xmpp/stanza.h"
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#include "xmpp/connection.h"
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static gboolean
_is_valid_form_element(xmpp_stanza_t *stanza)
{
char *name = xmpp_stanza_get_name(stanza);
if (g_strcmp0(name, STANZA_NAME_X) != 0) {
log_error("Error parsing form, root element not <x/>.");
return FALSE;
}
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char *ns = xmpp_stanza_get_ns(stanza);
if (g_strcmp0(ns, STANZA_NS_DATA) != 0) {
log_error("Error parsing form, namespace not %s.", STANZA_NS_DATA);
return FALSE;
}
char *type = xmpp_stanza_get_attribute(stanza, STANZA_ATTR_TYPE);
if ((g_strcmp0(type, "form") != 0) &&
(g_strcmp0(type, "submit") != 0) &&
(g_strcmp0(type, "cancel") != 0) &&
(g_strcmp0(type, "result") != 0)) {
log_error("Error parsing form, unknown type.");
return FALSE;
}
return TRUE;
}
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static DataForm*
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_form_new(void)
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{
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DataForm *form = malloc(sizeof(DataForm));
form->type = NULL;
form->title = NULL;
form->instructions = NULL;
form->fields = NULL;
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form->var_to_tag = NULL;
form->tag_to_var = NULL;
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form->tag_ac = NULL;
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return form;
}
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static FormField*
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_field_new(void)
{
FormField *field = malloc(sizeof(FormField));
field->label = NULL;
field->type = NULL;
field->var = NULL;
field->description = NULL;
field->required = FALSE;
field->values = NULL;
field->options = NULL;
return field;
}
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static char*
_get_property(xmpp_stanza_t *const stanza, const char *const property)
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{
char *result = NULL;
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xmpp_ctx_t *ctx = connection_get_ctx();
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xmpp_stanza_t *child = xmpp_stanza_get_child_by_name(stanza, property);
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if (child) {
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char *child_text = xmpp_stanza_get_text(child);
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if (child_text) {
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result = strdup(child_text);
xmpp_free(ctx, child_text);
}
}
return result;
}
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static char*
_get_attr(xmpp_stanza_t *const stanza, const char *const attr)
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{
char *result = xmpp_stanza_get_attribute(stanza, attr);
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if (result) {
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return strdup(result);
} else {
return NULL;
}
}
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static gboolean
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_is_required(xmpp_stanza_t *const stanza)
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{
xmpp_stanza_t *child = xmpp_stanza_get_child_by_name(stanza, "required");
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if (child) {
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return TRUE;
} else {
return FALSE;
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}
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}
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static form_field_type_t
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_get_field_type(const char *const type)
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{
if (g_strcmp0(type, "hidden") == 0) {
return FIELD_HIDDEN;
}
if (g_strcmp0(type, "text-single") == 0) {
return FIELD_TEXT_SINGLE;
}
if (g_strcmp0(type, "text-private") == 0) {
return FIELD_TEXT_PRIVATE;
}
if (g_strcmp0(type, "text-multi") == 0) {
return FIELD_TEXT_MULTI;
}
if (g_strcmp0(type, "boolean") == 0) {
return FIELD_BOOLEAN;
}
if (g_strcmp0(type, "list-single") == 0) {
return FIELD_LIST_SINGLE;
}
if (g_strcmp0(type, "list-multi") == 0) {
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return FIELD_LIST_MULTI;
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}
if (g_strcmp0(type, "jid-single") == 0) {
return FIELD_JID_SINGLE;
}
if (g_strcmp0(type, "jid-multi") == 0) {
return FIELD_JID_MULTI;
}
if (g_strcmp0(type, "fixed") == 0) {
return FIELD_FIXED;
}
return FIELD_UNKNOWN;
}
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DataForm*
form_create(xmpp_stanza_t *const form_stanza)
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{
xmpp_ctx_t *ctx = connection_get_ctx();
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if (!_is_valid_form_element(form_stanza)) {
return NULL;
}
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DataForm *form = _form_new();
form->type = _get_attr(form_stanza, "type");
form->title = _get_property(form_stanza, "title");
form->instructions = _get_property(form_stanza, "instructions");
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form->var_to_tag = g_hash_table_new_full(g_str_hash, g_str_equal, free, free);
form->tag_to_var = g_hash_table_new_full(g_str_hash, g_str_equal, free, free);
form->tag_ac = autocomplete_new();
form->modified = FALSE;
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int tag_num = 1;
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// get fields
xmpp_stanza_t *form_child = xmpp_stanza_get_children(form_stanza);
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while (form_child) {
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char *child_name = xmpp_stanza_get_name(form_child);
if (g_strcmp0(child_name, "field") == 0) {
xmpp_stanza_t *field_stanza = form_child;
FormField *field = _field_new();
field->label = _get_attr(field_stanza, "label");
field->type = _get_attr(field_stanza, "type");
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field->type_t = _get_field_type(field->type);
field->value_ac = autocomplete_new();
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field->var = _get_attr(field_stanza, "var");
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if (field->type_t != FIELD_HIDDEN && field->var) {
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GString *tag = g_string_new("");
g_string_printf(tag, "field%d", tag_num++);
g_hash_table_insert(form->var_to_tag, strdup(field->var), strdup(tag->str));
g_hash_table_insert(form->tag_to_var, strdup(tag->str), strdup(field->var));
autocomplete_add(form->tag_ac, tag->str);
g_string_free(tag, TRUE);
}
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field->description = _get_property(field_stanza, "desc");
field->required = _is_required(field_stanza);
// handle repeated field children
xmpp_stanza_t *field_child = xmpp_stanza_get_children(field_stanza);
int value_index = 1;
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while (field_child) {
child_name = xmpp_stanza_get_name(field_child);
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// handle values
if (g_strcmp0(child_name, "value") == 0) {
char *value = xmpp_stanza_get_text(field_child);
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if (value) {
field->values = g_slist_append(field->values, strdup(value));
if (field->type_t == FIELD_TEXT_MULTI) {
GString *ac_val = g_string_new("");
g_string_printf(ac_val, "val%d", value_index++);
autocomplete_add(field->value_ac, ac_val->str);
g_string_free(ac_val, TRUE);
}
if (field->type_t == FIELD_JID_MULTI) {
autocomplete_add(field->value_ac, value);
}
xmpp_free(ctx, value);
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}
// handle options
} else if (g_strcmp0(child_name, "option") == 0) {
FormOption *option = malloc(sizeof(FormOption));
option->label = _get_attr(field_child, "label");
option->value = _get_property(field_child, "value");
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if ((field->type_t == FIELD_LIST_SINGLE) || (field->type_t == FIELD_LIST_MULTI)) {
autocomplete_add(field->value_ac, option->value);
}
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field->options = g_slist_append(field->options, option);
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}
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field_child = xmpp_stanza_get_next(field_child);
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}
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form->fields = g_slist_append(form->fields, field);
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}
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form_child = xmpp_stanza_get_next(form_child);
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}
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return form;
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}
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xmpp_stanza_t*
form_create_submission(DataForm *form)
{
xmpp_ctx_t *ctx = connection_get_ctx();
xmpp_stanza_t *x = xmpp_stanza_new(ctx);
xmpp_stanza_set_name(x, STANZA_NAME_X);
xmpp_stanza_set_ns(x, STANZA_NS_DATA);
xmpp_stanza_set_type(x, "submit");
GSList *curr_field = form->fields;
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while (curr_field) {
FormField *field = curr_field->data;
if (field->type_t != FIELD_FIXED) {
xmpp_stanza_t *field_stanza = xmpp_stanza_new(ctx);
xmpp_stanza_set_name(field_stanza, "field");
xmpp_stanza_set_attribute(field_stanza, "var", field->var);
xmpp_stanza_t *value_stanza = NULL;
GSList *curr_value = NULL;
switch (field->type_t) {
case FIELD_HIDDEN:
case FIELD_TEXT_SINGLE:
case FIELD_TEXT_PRIVATE:
case FIELD_BOOLEAN:
case FIELD_LIST_SINGLE:
case FIELD_JID_SINGLE:
value_stanza = xmpp_stanza_new(ctx);
xmpp_stanza_set_name(value_stanza, "value");
if (field->values) {
if (field->values->data) {
xmpp_stanza_t *text_stanza = xmpp_stanza_new(ctx);
xmpp_stanza_set_text(text_stanza, field->values->data);
xmpp_stanza_add_child(value_stanza, text_stanza);
xmpp_stanza_release(text_stanza);
}
}
xmpp_stanza_add_child(field_stanza, value_stanza);
xmpp_stanza_release(value_stanza);
break;
case FIELD_TEXT_MULTI:
case FIELD_LIST_MULTI:
case FIELD_JID_MULTI:
curr_value = field->values;
while (curr_value) {
char *value = curr_value->data;
value_stanza = xmpp_stanza_new(ctx);
xmpp_stanza_set_name(value_stanza, "value");
if (value) {
xmpp_stanza_t *text_stanza = xmpp_stanza_new(ctx);
xmpp_stanza_set_text(text_stanza, value);
xmpp_stanza_add_child(value_stanza, text_stanza);
xmpp_stanza_release(text_stanza);
}
xmpp_stanza_add_child(field_stanza, value_stanza);
xmpp_stanza_release(value_stanza);
curr_value = g_slist_next(curr_value);
}
break;
case FIELD_FIXED:
default:
break;
}
xmpp_stanza_add_child(x, field_stanza);
xmpp_stanza_release(field_stanza);
}
curr_field = g_slist_next(curr_field);
}
return x;
}
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static void
_free_option(FormOption *option)
{
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if (option) {
free(option->label);
free(option->value);
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free(option);
}
}
static void
_free_field(FormField *field)
{
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if (field) {
free(field->label);
free(field->type);
free(field->var);
free(field->description);
g_slist_free_full(field->values, free);
g_slist_free_full(field->options, (GDestroyNotify)_free_option);
autocomplete_free(field->value_ac);
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free(field);
}
}
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void
form_destroy(DataForm *form)
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{
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if (form) {
free(form->type);
free(form->title);
free(form->instructions);
g_slist_free_full(form->fields, (GDestroyNotify)_free_field);
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g_hash_table_destroy(form->var_to_tag);
g_hash_table_destroy(form->tag_to_var);
autocomplete_free(form->tag_ac);
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free(form);
}
}
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static int
_field_compare_by_var(FormField *a, FormField *b)
{
return g_strcmp0(a->var, b->var);
}
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GSList*
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form_get_non_form_type_fields_sorted(DataForm *form)
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{
GSList *sorted = NULL;
GSList *curr = form->fields;
while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, "FORM_TYPE") != 0) {
sorted = g_slist_insert_sorted(sorted, field, (GCompareFunc)_field_compare_by_var);
}
curr = g_slist_next(curr);
}
return sorted;
}
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GSList*
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form_get_field_values_sorted(FormField *field)
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{
GSList *sorted = NULL;
GSList *curr = field->values;
while (curr) {
char *value = curr->data;
if (value) {
sorted = g_slist_insert_sorted(sorted, value, (GCompareFunc)g_strcmp0);
}
curr = g_slist_next(curr);
}
return sorted;
}
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char*
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form_get_form_type_field(DataForm *form)
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{
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GSList *curr = form->fields;
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while (curr) {
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FormField *field = curr->data;
if (g_strcmp0(field->var, "FORM_TYPE") == 0) {
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return field->values->data;
}
curr = g_slist_next(curr);
}
return NULL;
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}
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gboolean
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form_tag_exists(DataForm *form, const char *const tag)
{
GList *tags = g_hash_table_get_keys(form->tag_to_var);
GList *curr = tags;
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while (curr) {
if (g_strcmp0(curr->data, tag) == 0) {
return TRUE;
}
curr = g_list_next(curr);
}
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g_list_free(tags);
return FALSE;
}
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form_field_type_t
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form_get_field_type(DataForm *form, const char *const tag)
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{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
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GSList *curr = form->fields;
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while (curr) {
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FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
return field->type_t;
}
curr = g_slist_next(curr);
}
}
return FIELD_UNKNOWN;
}
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void
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form_set_value(DataForm *form, const char *const tag, char *value)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
if (g_slist_length(field->values) == 0) {
field->values = g_slist_append(field->values, strdup(value));
form->modified = TRUE;
return;
} else if (g_slist_length(field->values) == 1) {
free(field->values->data);
field->values->data = strdup(value);
form->modified = TRUE;
return;
}
}
curr = g_slist_next(curr);
}
}
}
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void
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form_add_value(DataForm *form, const char *const tag, char *value)
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{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
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GSList *curr = form->fields;
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while (curr) {
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FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
field->values = g_slist_append(field->values, strdup(value));
if (field->type_t == FIELD_TEXT_MULTI) {
int total = g_slist_length(field->values);
GString *value_index = g_string_new("");
g_string_printf(value_index, "val%d", total);
autocomplete_add(field->value_ac, value_index->str);
g_string_free(value_index, TRUE);
}
form->modified = TRUE;
return;
}
curr = g_slist_next(curr);
}
}
}
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gboolean
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form_add_unique_value(DataForm *form, const char *const tag, char *value)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
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GSList *curr_value = field->values;
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while (curr_value) {
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if (g_strcmp0(curr_value->data, value) == 0) {
return FALSE;
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}
curr_value = g_slist_next(curr_value);
}
field->values = g_slist_append(field->values, strdup(value));
if (field->type_t == FIELD_JID_MULTI) {
autocomplete_add(field->value_ac, value);
}
form->modified = TRUE;
return TRUE;
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}
curr = g_slist_next(curr);
}
}
return FALSE;
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}
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gboolean
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form_remove_value(DataForm *form, const char *const tag, char *value)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
GSList *found = g_slist_find_custom(field->values, value, (GCompareFunc)g_strcmp0);
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if (found) {
free(found->data);
found->data = NULL;
field->values = g_slist_delete_link(field->values, found);
if (field->type_t == FIELD_JID_MULTI) {
autocomplete_remove(field->value_ac, value);
}
form->modified = TRUE;
return TRUE;
} else {
return FALSE;
}
}
curr = g_slist_next(curr);
}
}
return FALSE;
}
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gboolean
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form_remove_text_multi_value(DataForm *form, const char *const tag, int index)
{
index--;
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
GSList *item = g_slist_nth(field->values, index);
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if (item) {
free(item->data);
item->data = NULL;
field->values = g_slist_delete_link(field->values, item);
GString *value_index = g_string_new("");
g_string_printf(value_index, "val%d", index+1);
autocomplete_remove(field->value_ac, value_index->str);
g_string_free(value_index, TRUE);
form->modified = TRUE;
return TRUE;
} else {
return FALSE;
}
}
curr = g_slist_next(curr);
}
}
return FALSE;
}
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int
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form_get_value_count(DataForm *form, const char *const tag)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
if ((g_slist_length(field->values) == 1) && (field->values->data == NULL)) {
return 0;
} else {
return g_slist_length(field->values);
}
}
curr = g_slist_next(curr);
}
}
return 0;
}
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gboolean
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form_field_contains_option(DataForm *form, const char *const tag, char *value)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
GSList *curr_option = field->options;
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while (curr_option) {
FormOption *option = curr_option->data;
if (g_strcmp0(option->value, value) == 0) {
return TRUE;
}
curr_option = g_slist_next(curr_option);
}
}
curr = g_slist_next(curr);
}
}
return FALSE;
}
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FormField*
form_get_field_by_tag(DataForm *form, const char *const tag)
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{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
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GSList *curr = form->fields;
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while (curr) {
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FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
return field;
}
curr = g_slist_next(curr);
}
}
return NULL;
}
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Autocomplete
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form_get_value_ac(DataForm *form, const char *const tag)
{
char *var = g_hash_table_lookup(form->tag_to_var, tag);
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if (var) {
GSList *curr = form->fields;
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while (curr) {
FormField *field = curr->data;
if (g_strcmp0(field->var, var) == 0) {
return field->value_ac;
}
curr = g_slist_next(curr);
}
}
return NULL;
}
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void
form_reset_autocompleters(DataForm *form)
{
autocomplete_reset(form->tag_ac);
GSList *curr_field = form->fields;
while (curr_field) {
FormField *field = curr_field->data;
autocomplete_reset(field->value_ac);
curr_field = g_slist_next(curr_field);
}
}