<?php
# MantisBT - A PHP based bugtracking system

# 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.
#
# 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 MantisBT.  If not, see <http://www.gnu.org/licenses/>.

/**
 * This file implements CSV export functionality within MantisBT
 * @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 authentication_api.php
 * @uses columns_api.php
 * @uses constant_inc.php
 * @uses csv_api.php
 * @uses file_api.php
 * @uses filter_api.php
 * @uses helper_api.php
 * @uses print_api.php
 */

require_once( 'core.php' );
require_api( 'authentication_api.php' );
require_api( 'columns_api.php' );
require_api( 'constant_inc.php' );
require_api( 'csv_api.php' );
require_api( 'file_api.php' );
require_api( 'filter_api.php' );
require_api( 'helper_api.php' );
require_api( 'print_api.php' );

auth_ensure_user_authenticated();

helper_begin_long_process();

$t_page_number = 1;
$t_per_page = -1;
$t_bug_count = null;
$t_page_count = null;

$t_nl = csv_get_newline();
$t_sep = csv_get_separator();

# Get bug rows according to the current filter
$t_rows = filter_get_bug_rows( $t_page_number, $t_per_page, $t_page_count, $t_bug_count );
if( $t_rows === false ) {
	print_header_redirect( 'view_all_set.php?type=0' );
}

# pre-cache custom column data
columns_plugin_cache_issue_data( $t_rows );

$t_filename = csv_get_default_filename();

# Send headers to browser to activate mime loading

# Make sure that IE can download the attachments under https.
header( 'Pragma: public' );

header( 'Content-Type: text/csv; name=' . urlencode( file_clean_name( $t_filename ) ) );
header( 'Content-Transfer-Encoding: BASE64;' );

# Added Quotes (") around file name.
header( 'Content-Disposition: attachment; filename="' . urlencode( file_clean_name( $t_filename ) ) . '"' );

# Get columns to be exported
$t_columns = csv_get_columns();

# export BOM
if( config_get( 'csv_add_bom' ) == ON ) {
	echo "\xEF\xBB\xBF";
}

# export the titles
$t_first_column = true;
ob_start();
$t_titles = array();
foreach ( $t_columns as $t_column ) {
	if( !$t_first_column ) {
		echo $t_sep;
	} else {
		$t_first_column = false;
	}

	echo column_get_title( $t_column );
}

echo $t_nl;

$t_header = ob_get_clean();

# Fixed for a problem in Excel where it prompts error message "SYLK: File Format Is Not Valid"
# See Microsoft Knowledge Base Article - 323626
# http://support.microsoft.com/default.aspx?scid=kb;en-us;323626&Product=xlw
$t_first_three_chars = utf8_substr( $t_header, 0, 3 );
if( strcmp( $t_first_three_chars, 'ID' . $t_sep ) == 0 ) {
	$t_header = str_replace( 'ID' . $t_sep, 'Id' . $t_sep, $t_header );
}
# end of fix

echo $t_header;

# export the rows
foreach ( $t_rows as $t_row ) {
	$t_first_column = true;

	foreach ( $t_columns as $t_column ) {
		if( !$t_first_column ) {
			echo $t_sep;
		} else {
			$t_first_column = false;
		}

		if( column_get_custom_field_name( $t_column ) !== null || column_is_plugin_column( $t_column ) ) {
			ob_start();
			$t_column_value_function = 'print_column_value';
			helper_call_custom_function( $t_column_value_function, array( $t_column, $t_row, COLUMNS_TARGET_CSV_PAGE ) );
			$t_value = ob_get_clean();

			echo csv_escape_string( $t_value );
		} else {
			$t_function = 'csv_format_' . $t_column;
			echo $t_function( $t_row );
		}
	}

	echo $t_nl;
}