/**
* Wraps an SQL query.
*
* @param array $aColumns
* @param array $aTables
* @param array $aLimitations
* @param array $aGroupColumns
* @param string $primaryKey
* @param array $aLeftJoinedTables
* @return integer The number of rows affected by the query
*/
function _select($aColumns, $aTables, $aLimitations, $aGroupColumns, $primaryKey, $aLeftJoinedTables = null)
{
$conf = $GLOBALS['_MAX']['CONF'];
$oDbh = OA_DB::singleton();
$columns = '';
if (is_array($aColumns)) {
foreach ($aColumns as $column => $alias) {
$columns .= $columns == '' ? "SELECT {$column} AS {$alias}" : ",{$column} AS {$alias}";
}
} else {
$columns = "SELECT {$aColumns}";
}
$prev_aliases = array();
$tables = '';
if (is_array($aTables)) {
$x = 0;
if (!is_null($aLeftJoinedTables)) {
$aTables = array_diff($aTables, $aLeftJoinedTables);
}
$joinType = 'INNER';
while (count($aTables) && $x < 50) {
$x++;
foreach ($aTables as $tableKey => $alias) {
$table = $tableKey;
// check for prefix
if (!empty($conf['table']['prefix']) && strpos($table, $conf['table']['prefix']) != 0) {
$table = $conf['table']['prefix'] . $table;
}
$qTable = $oDbh->quoteIdentifier($table, true);
$joinLimitation = '';
if (count($prev_aliases)) {
if (is_array($aLimitations)) {
foreach ($aLimitations as $limitationKey => $limitation) {
if (preg_match("/({$alias}\\.[a-z0-9_]+ *= *(" . join('|', $prev_aliases) . ")\\..+|(" . join('|', $prev_aliases) . ")\\.[a-z0-9_]+ *= *{$alias}\\..+)/", $limitation)) {
$joinLimitation = $limitation;
unset($aLimitations[$limitationKey]);
break;
}
}
}
} else {
$tables .= " FROM {$qTable} AS {$alias}";
}
if ($joinLimitation) {
$tables .= " {$joinType} JOIN {$qTable} AS {$alias} ON ({$joinLimitation})";
} elseif (count($prev_aliases)) {
continue;
}
$prev_aliases[] = $alias;
unset($aTables[$tableKey]);
}
if (!is_null($aLeftJoinedTables) && !count($aTables)) {
$aTables = $aLeftJoinedTables;
$aLeftJoinedTables = null;
$joinType = 'LEFT';
}
}
} else {
$tables = "FROM " . $oDbh->quoteIdentifier($aTables, true);
}
$where = '';
if (is_array($aLimitations)) {
foreach ($aLimitations as $limitation) {
$where .= $where == '' ? " WHERE {$limitation}" : " AND {$limitation}";
}
} else {
$where = " WHERE {$aLimitations}";
}
$group = '';
if (is_array($aGroupColumns) && count($aGroupColumns) > 0) {
$group = ' GROUP BY ' . implode(',', $aGroupColumns);
}
$query = $columns . $tables . $where . $group;
//var_dump($query);
return SqlBuilder::_query($query, $primaryKey);
}