link_update.php

<?php
/**
 * Linked custom fields plugin for MantisBT
 *
 * Copyright (c) 2011 Robert Munteanu (robert@lmn.ro)
 * Copyright (c) 2018, 2022 Damien Regad
 *
 * Linked custom fields for MantisBT is free software:
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation,
 * either version 2 of the License, or (at your option) any later version.
 *
 * Linked custom fields plugin for MantisBT 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 Linked custom fields plugin for MantisBT.
 * If not, see <http://www.gnu.org/licenses/>.
 */

access_ensure_global_level( config_get( 'manage_custom_fields_threshold' ) );

form_security_validate( 'configure_custom_field_link' );

$t_value_mappings = array();

$f_source_field_id =  gpc_get_int( 'custom_field_id' );
$t_source_field = custom_field_get_definition( $f_source_field_id );
$t_source_field_values = explode ( '|', $t_source_field['possible_values'] );

$f_target_field_id = gpc_get_int('target_custom_field' );

foreach( $_POST as $f_post_key => $f_post_value ) {

	if( strpos($f_post_key, 'custom_field_linked_values_' ) === 0 ) {

		$t_source_value_index = substr( $f_post_key, strlen ('custom_field_linked_values_') );
		$t_source_value = $t_source_field_values[ $t_source_value_index ];
		$t_linked_value = gpc_get( $f_post_key );
		$t_value_mappings[$t_source_value] = $t_linked_value;
	}
}

form_security_purge( 'configure_custom_field_link' );

if( LinkedCustomFieldsDao::getLinkedFieldId( $f_target_field_id ) ) {
	plugin_error( LinkedCustomFieldsPlugin::ERROR_ALREADY_LINKED );
} else {
	LinkedCustomFieldsDao::replaceValues( $f_source_field_id, $f_target_field_id , $t_value_mappings );
	header("Location: " . plugin_page( 'configure_links.php' ) );
}