<?php
# Mantis - a php based bugtracking system

# Mantis 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.
#
# Mantis 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 Mantis.  If not, see <http://www.gnu.org/licenses/>.

/**
 * View Bug Revisions
 *
 * @package MantisBT
 * @copyright Copyright 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
 * @copyright Copyright 2002  MantisBT Team   - mantisbt-dev@lists.sourceforge.net
 * @link http://www.mantisbt.org
 *
 * @uses core.php
 * @uses access_api.php
 * @uses bug_api.php
 * @uses bugnote_api.php
 * @uses bug_revision_api.php
 * @uses config_api.php
 * @uses constant_inc.php
 * @uses form_api.php
 * @uses gpc_api.php
 * @uses helper_api.php
 * @uses html_api.php
 * @uses lang_api.php
 * @uses print_api.php
 * @uses string_api.php
 * @uses user_api.php
 */

require_once( 'core.php' );
require_api( 'access_api.php' );
require_api( 'bug_api.php' );
require_api( 'bugnote_api.php' );
require_api( 'bug_revision_api.php' );
require_api( 'config_api.php' );
require_api( 'constant_inc.php' );
require_api( 'form_api.php' );
require_api( 'gpc_api.php' );
require_api( 'helper_api.php' );
require_api( 'html_api.php' );
require_api( 'lang_api.php' );
require_api( 'print_api.php' );
require_api( 'string_api.php' );
require_api( 'user_api.php' );

$f_bug_id = gpc_get_int( 'bug_id', 0 );
$f_bugnote_id = gpc_get_int( 'bugnote_id', 0 );
$f_rev_id = gpc_get_int( 'rev_id', 0 );

$t_title = '';

if( $f_bug_id ) {
	$t_bug_id = (int)$f_bug_id;
	$t_bugnote_id = false;
	$t_bug_revisions = bug_revision_list( $t_bug_id );

	$t_title = lang_get( 'issue_id' ) . $t_bug_id;

} elseif( $f_bugnote_id ) {
	$t_bugnote_id = (int)$f_bugnote_id;
	$t_bug_id = bugnote_get_field( $t_bugnote_id, 'bug_id' );

	$t_bug_revisions = bug_revision_list( $t_bug_id, REV_ANY, $f_bugnote_id );

	$t_title = lang_get( 'bugnote' ) . ' ' . $f_bugnote_id;

} elseif( $f_rev_id ) {
	$t_bug_revisions = bug_revision_like( $f_rev_id );

	if( count( $t_bug_revisions ) < 1 ) {
		trigger_error( ERROR_GENERIC, ERROR );
	}

	$t_rev = $t_bug_revisions[$f_rev_id];
	$t_bug_id = $t_rev['bug_id'];
	$t_bugnote_id = $t_rev['bugnote_id'];

	$t_title = lang_get( 'issue_id' ) . $t_bug_id;

} else {
	trigger_error( ERROR_GENERIC, ERROR );
	exit;
}

# Make sure user is allowed to view revisions
# If processing a bugnote, we don't need to check bug-level access as it is
# already done at the lower level, and in fact we must not do it as a user may
# be allowed to view their own bugnote's history, but not the parent issue's.
if( $t_bugnote_id ) {
	if( !access_can_view_bugnote_revisions( $t_bugnote_id ) ) {
		access_denied();
	}
} elseif( $t_bug_id && !access_can_view_bug_revisions( $t_bug_id ) ) {
	access_denied();
}


/**
 * Show Bug revision
 *
 * @param array $p_revision Bug Revision Data.
 */
function show_revision( array $p_revision ) {
	static $s_view_bug_threshold = null;
	static $s_can_drop = null;
	static $s_date_format = null;

	/**
	 * @var int    $v_id
	 * @var int    $v_bug_id
	 * @var int    $v_bugnote_id
	 * @var int    $v_type
	 * @var int    $v_user_id
	 * @var int    $v_timestamp
	 * @var string $v_value
	 */
	extract( $p_revision, EXTR_PREFIX_ALL, 'v' );

	if( is_null( $s_can_drop ) ) {
		$t_project_id = bug_get_field( $v_bug_id, 'project_id' );

		$t_bug_revision_drop_threshold = config_get( 'bug_revision_drop_threshold', null, null, $t_project_id );
		$s_view_bug_threshold = config_get( 'view_bug_threshold', null, null, $t_project_id );
		$s_can_drop = access_has_bug_level( $t_bug_revision_drop_threshold, $v_bug_id );
		$s_date_format = config_get( 'normal_date_format', null, null, $t_project_id );
	}

	switch( $v_type ) {
		case REV_DESCRIPTION:
			$t_label = lang_get( 'description' );
			break;
		case REV_STEPS_TO_REPRODUCE:
			$t_label = lang_get( 'steps_to_reproduce' );
			break;
		case REV_ADDITIONAL_INFO:
			$t_label = lang_get( 'additional_information' );
			break;
		case REV_BUGNOTE:
			if( !access_has_bugnote_level( $s_view_bug_threshold, $v_bugnote_id ) ) {
				return;
			}

			$t_label = lang_get( 'bugnote' );
			break;
		default:
			$t_label = '';
	}

	$t_by_string = sprintf( lang_get( 'revision_by' ),
		string_display_line( date( $s_date_format, $v_timestamp ) ),
		prepare_user_name( $v_user_id )
	);

?>
	<tr class="spacer">
		<td><a id="revision-<?php echo $v_id ?>"></a></td>
	</tr>

	<tr>
		<th class="category"><?php echo lang_get( 'revision' ) ?></th>
		<td>
<?php
	echo $t_by_string;

	if( $s_can_drop ) {
		$t_drop_token = form_security_param( 'bug_revision_drop' );
		print_link_button(
			'bug_revision_drop.php?id=' . $v_id . $t_drop_token,
			lang_get( 'revision_drop' ),
			'btn-sm pull-right'
		);
	}
?>
		</td>
	</tr>

	<tr>
		<th class="category"><?php echo $t_label ?></th>
		<td>
			<?php echo string_display_links( $v_value ) ?>
		</td>
	</tr>
<?php
} # End show_revision()

layout_page_header( bug_format_summary( $t_bug_id, SUMMARY_CAPTION ) );
layout_page_begin();

?>

<div class="col-md-12 col-xs-12">
	<div class="widget-box widget-color-blue2">
		<div class="widget-header widget-header-small">
			<h4 class="widget-title lighter">
				<?php print_icon( 'fa-history', 'ace-icon' ); ?>
				<?php echo lang_get( 'view_revisions' ), ': ', $t_title ?>
			</h4>
		</div>

		<div class="widget-body">
			<div class="widget-toolbox">
				<div class="btn-toolbar">
					<div class="btn-group pull-right">
<?php
if( !$f_bug_id && !$f_bugnote_id ) {
	print_small_button( '?bug_id=' . $t_bug_id, lang_get( 'all_revisions' ) );
}
print_small_button( 'view.php?id=' . $t_bug_id, lang_get( 'back_to_issue' ) );
?>
					</div>
				</div>
			</div>

			<div class="widget-main no-padding">
				<div class="table-responsive">
					<table class="table table-bordered table-condensed table-striped">
						<tr>
							<th class="category width-20">
								<?php echo lang_get( 'summary' ) ?>
							</th>
							<td>
								<?php echo bug_format_summary( $t_bug_id, SUMMARY_FIELD ) ?>
							</td>
						</tr>
<?php
foreach( $t_bug_revisions as $t_rev ) {
	show_revision( $t_rev );
}
?>
					</table>
				</div>
			</div>
		</div>
	</div>
</div>

<?php
layout_page_end();