<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Set of functions related to applying transformations for VIEWs
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}


/**
* Get the column details of VIEW with its original references
*
* @param string $sql_query SQL for original resource
* @param array $view_columns Columns of VIEW if defined new column names
*
* @return array $column_map Details of VIEW columns
*/
function PMA_getColumnMap($sql_query, $view_columns)
{

$column_map = array();
// Select query which give results for VIEW
$real_source_result = PMA_DBI_try_query($sql_query);

if ($real_source_result !== false) {

$real_source_fields_meta = PMA_DBI_get_fields_meta($real_source_result);

if (count($real_source_fields_meta) > 0) {

for ($i=0; $i<count($real_source_fields_meta); $i++) {

$map = array();
$map['table_name'] = $real_source_fields_meta[$i]->table;
$map['refering_column'] = $real_source_fields_meta[$i]->name;

if (count($view_columns) > 1) {
$map['real_column'] = $view_columns[$i];
}

$column_map[] = $map;

}

}

}
unset($real_source_result);

return $column_map;

}


/**
* Get existing data on tranformations applyed for
* columns in a particular table
*
* @param string $db Database name looking for
*
* @return mysqli_result Result of executed SQL query
*/
function PMA_getExistingTranformationData($db)
{
$cfgRelation = PMA_getRelationsParam();

// Get the existing transformation details of the same database
// from pma__column_info table
$pma_transformation_sql = 'SELECT * FROM '
. PMA_Util::backquote($cfgRelation['db']) . '.'
. PMA_Util::backquote($cfgRelation['column_info'])
. ' WHERE `db_name` = \''
. PMA_Util::sqlAddSlashes($db) . '\'';

return PMA_DBI_try_query($pma_transformation_sql);

}


/**
* Get SQL query for store new transformation details of a VIEW
*
* @param mysqli_result $pma_tranformation_data Result set of SQL execution
* @param array $column_map Details of VIEW columns
* @param string $view_name Name of the VIEW
* @param string $db Database name of the VIEW
*
* @return string $new_transformations_sql SQL query for new tranformations
*/
function PMA_getNewTransformationDataSql(
$pma_tranformation_data, $column_map, $view_name, $db
) {
$cfgRelation = PMA_getRelationsParam();

// Need to store new transformation details for VIEW
$new_transformations_sql = 'INSERT INTO '
. PMA_Util::backquote($cfgRelation['db']) . '.'
. PMA_Util::backquote($cfgRelation['column_info'])
. ' (`db_name`, `table_name`, `column_name`, `comment`, '
. '`mimetype`, `transformation`, `transformation_options`)'
. ' VALUES ';

$column_count = 0;
$add_comma = false;

while ($data_row = PMA_DBI_fetch_assoc($pma_tranformation_data)) {

foreach ($column_map as $column) {

if ($data_row['table_name'] == $column['table_name']
&& $data_row['column_name'] == $column['refering_column']
) {

$new_transformations_sql .= $add_comma ? ', ' : '';

$new_transformations_sql .= '('
. '\'' . $db . '\', '
. '\'' . $view_name . '\', '
. '\'';

$new_transformations_sql .= (isset($column['real_column']))
? $column['real_column']
: $column['refering_column'];

$new_transformations_sql .= '\', '
. '\'' . $data_row['comment'] . '\', '
. '\'' . $data_row['mimetype'] . '\', '
. '\'' . $data_row['transformation'] . '\', '
. '\''
. PMA_Util::sqlAddSlashes(
$data_row['transformation_options']
)
. '\')';

$add_comma = true;
$column_count++;
break;

}

}

if ($column_count == count($column_map)) {
break;
}

}

return ($column_count > 0) ? $new_transformations_sql : '';

}


?>