function add_station($dirty) {
if (is_read_only()) {
return false;
}
global $db;
$clean = sql_escape_hash($dirty);
$station = db_get('select * from stations where callsign = "' . $clean['callsign'] . '"');
if(!$station) {
$lhs = array_keys($dirty); $rhs = array_values($dirty);
return $db->exec('insert into stations (' . implode(',', $lhs) . ') values ("' . implode('","', $rhs) . '")');
} else {
$inj = sql_kv($dirty);
return $db->exec('update stations set ' . implode(',', $inj) . ' where id = ' . $station['id']);
}
}
echo "Creating the {$table_name} table.\n";
$schema = implode(',', sql_kv($table_schema, '', ''));
$db->exec("create table {$table_name} ( {$schema} )");
} else {
// Otherwise we may need to add columns to the table
$our_column_name_list = array_keys($table_schema);
$column_to_add_list = array_diff($our_column_name_list, $existing_column_name_list);
if (count($column_to_add_list)) {
echo "Adding the following columns from {$table_name}:\n";
echo " " . implode(', ', $column_to_add_list) . "\n\n";
foreach ($column_to_add_list as $column_to_add) {
$column_to_add_schema = $table_schema[$column_to_add];
$db->exec("alter table {$table_name} add column {$column_to_add} {$column_to_add_schema}");
}
// If we added columns then we need to revisit our pragma
$existing_column_name_list = get_column_list($table_name);
}
$column_to_remove_list = array_diff($existing_column_name_list, $our_column_name_list);
// See if we need to remove any columns
if (count($column_to_remove_list) > 0) {
echo "Removing the following columns from {$table_name}:\n";
echo " " . implode(', ', $column_to_remove_list) . "\n\n";
$our_schema = implode(',', sql_kv($table_schema, '', ''));
$our_columns = implode(',', $our_column_name_list);
$drop_column_sql = "\n CREATE TEMPORARY TABLE my_backup({$our_schema});\n INSERT INTO my_backup SELECT {$our_columns} FROM {$table_name};\n DROP TABLE {$table_name};\n CREATE TABLE {$table_name}({$our_schema});\n INSERT INTO {$table_name} SELECT {$our_columns} FROM my_backup;\n DROP TABLE my_backup;\n ";
foreach (explode('\\n', trim($drop_column_sql)) as $sql_line) {
$db->exec($sql_line);
}
}
}
}