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<?php
/**
* PHP-Isis implementation of IsisDb.
*/
class PhpIsisDb implements IsisDb {
/**
* @var $db
* Database resource.
*/
var $db;
/**
* @var $format
* Database format, derived from $schema.
*/
var $format;
/**
* Constructor.
*
* @see IsisDb::__construct()
*/
public function __construct($schema) {
// Save db schema.
$this->format = $schema;
// Setup $fdt used by malete.
foreach ($schema['fields'] as $field => $info) {
$this->fdt[$field] = $info['name'];
}
// Open the database.
$name = $schema['db']['name'];
$this->db = isis_open("db/$name/$name");
}
/**
* Read an entry.
*
* @see IsisDb::read()
*/
public function read($id) {
$results = isis_search('$', $this->db);
if (!isis_data_seek($results, $id)) {
return FALSE;
}
return $this->tag(isis_fetch_array($results));
}
/**
* Return number of rows in the database.
*
* @see IsisDb::rows()
*/
public function rows() {
return isis_last_mfn($this->db);
}
/**
* Return a default example schema.
*
* @see IsisDb::default_schema()
*/
public function default_schema() {
return SchemaDb::default_schema();
}
/**
* Tag results of a db query.
*
* @param $results
* Database query results.
*
* @return
* Tagged database result.
*/
function tag($results) {
foreach ($results as $key => $value) {
if ($key != 'mfn') {
$name = $this->format['fields'][$key]['name'];
$data[$name] = $value;
}
}
return $data;
}
}
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