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<?php
namespace IP2Location;
/**
* Region class.
*/
class Region
{
/**
* Unable to locate CSV file.
*
* @var int
*/
public const EXCEPTION_FILE_NOT_EXISTS = 10000;
/**
* Invalid CSV file.
*
* @var int
*/
public const EXCEPTION_INVALID_CSV = 10001;
/**
* Unable to read the CSV file.
*
* @var int
*/
public const EXCEPTION_UNABLE_TO_OPEN_CSV = 10002;
/**
* No record found.
*
* @var int
*/
public const EXCEPTION_NO_RECORD = 10003;
/**
* Fields from CSV.
*
* @var array
*/
protected $fields = [];
/**
* Records from CSV.
*
* @var array
*/
protected $records = [];
/**
* Constructor.
*
* @param string $csv Path to CSV file
*
* @throws \Exception
*/
public function __construct($csv)
{
if (!file_exists($csv)) {
throw new \Exception(__CLASS__ . ': The CSV file "' . $csv . '" is not found.', self::EXCEPTION_FILE_NOT_EXISTS);
}
$file = fopen($csv, 'r');
if (!$file) {
throw new \Exception(__CLASS__ . ': Unable to read "' . $csv . '".', self::EXCEPTION_UNABLE_TO_OPEN_CSV);
}
$line = 1;
while (!feof($file)) {
$data = fgetcsv($file);
if (!$data) {
++$line;
continue;
}
// Parse the CSV fields
if ($line == 1) {
if ($data[1] != 'subdivision_name') {
throw new \Exception(__CLASS__ . ': Invalid region information CSV file.', self::EXCEPTION_INVALID_CSV);
}
$this->fields = $data;
} else {
$this->records[$data[0]][] = [
'code' => $data[2],
'name' => $data[1],
];
}
++$line;
}
}
/**
* Get region code by country code and region name.
*
* @param string $countryCode The country ISO 3166 country code.
* @param string $regionName Region name.
*
* @throws \Exception
*
* @return string|null
*/
public function getRegionCode($countryCode, $regionName)
{
if (empty($this->records)) {
throw new \Exception(__CLASS__ . ': No record available.', self::EXCEPTION_NO_RECORD);
}
if (!isset($this->records[$countryCode])) {
return;
}
foreach ($this->records[$countryCode] as $record) {
if (strtoupper($regionName) == strtoupper($record['name'])) {
return $record['code'];
}
}
}
}