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Add get max ID with multiple prefix without depending of length and c… #45

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Add get max ID with multiple prefix without depending of length and c…
yashiroiori Aug 28, 2024
5f5eff4
Update IdGenerator.php
yashiroiori Aug 28, 2024
993f0ea
Update IdGenerator.php
yashiroiori Aug 30, 2024
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138 changes: 101 additions & 37 deletions src/IdGenerator.php
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Original file line number Diff line number Diff line change
Expand Up @@ -2,96 +2,160 @@

namespace Haruncpi\LaravelIdGenerator;

use Illuminate\Support\Facades\DB, Exception;

use Exception;
use Illuminate\Support\Facades\DB;

/**
* IdGenerator Class
*
* @since 1.0.0
*/
class IdGenerator
{

private function getFieldType($table, $field)
/**
* Get type of a field
*
* @param string $table table name
* @param string $field field name
* @return array
*
* @throws Exception if field type return null
*
* @since 1.0.0
*/
private function getFieldType($table, $field, $connection)
{
$colsType = DB::select('describe ' . $table);
if($connection == null){
$connection = config('database.default');
}
$driver = DB::connection($connection)->getDriverName();
$database = DB::connection($connection)->getDatabaseName();

if ($driver == 'mysql') {
$sql = 'SELECT column_name AS "column_name",data_type AS "data_type",column_type AS "column_type" ';
$sql .= 'FROM information_schema.columns ';
$sql .= 'WHERE table_schema=:database AND table_name=:table';
} else {
// column_type not available in postgres SQL
// table_catalog is database in postgres
$sql = 'SELECT column_name AS "column_name",data_type AS "data_type" FROM information_schema.columns ';
$sql .= 'WHERE table_catalog=:database AND table_name=:table';
}

$rows = DB::connection($connection)->select($sql, ['database' => $database, 'table' => $table]);
$fieldType = null;
foreach ($colsType as $col) {
if ($field == $col->Field) {
$fieldType = $col->Type;
$fieldLength = 20;

foreach ($rows as $col) {
if ($field == $col->column_name) {
$fieldType = $col->data_type;
//column_type not available in postgres SQL
//mysql 8 optional display width for int,bigint numeric field

if ($driver == 'mysql') {
//example: column_type int(11) to 11
preg_match("/(?<=\().+?(?=\))/", $col->column_type, $tblFieldLength);
if (count($tblFieldLength)) {
$fieldLength = $tblFieldLength[0];
}
}

break;
}
}

if ($fieldType == null) throw new Exception("$field not found in $table table");
return $fieldType;
if ($fieldType == null) {
throw new Exception("$field not found in $table table");
}

return ['type' => $fieldType, 'length' => $fieldLength];
}

/**
* Main function to generate ID
*
* @param array $configArr configuration to generate ID
* @return string|int
*
* @throws Exception if id generation config invalid
*
* @since 1.0.0
*/
public static function generate($configArr)
{
if (!array_key_exists('table', $configArr) || $configArr['table'] == '') {
if (! array_key_exists('table', $configArr) || $configArr['table'] == '') {
throw new Exception('Must need a table name');
}
if (!array_key_exists('length', $configArr) || $configArr['length'] == '') {
if (! array_key_exists('length', $configArr) || $configArr['length'] == '') {
throw new Exception('Must specify the length of ID');
}
if (!array_key_exists('prefix', $configArr) || $configArr['prefix'] == '') {
if (! array_key_exists('prefix', $configArr) || $configArr['prefix'] == '') {
throw new Exception('Must specify a prefix of your ID');
}

if (array_key_exists('where', $configArr)) {
if (is_string($configArr['where']))
if (is_string($configArr['where'])) {
throw new Exception('where clause must be an array, you provided string');
if (!count($configArr['where']))
}
if (! count($configArr['where'])) {
throw new Exception('where clause must need at least an array');
}
}
$connection = array_key_exists('connection', $configArr) ? $configArr['connection'] : config('database.default');

$table = $configArr['table'];
$field = array_key_exists('field', $configArr) ? $configArr['field'] : 'id';

$prefix = $configArr['prefix'];
$resetOnPrefixChange = array_key_exists('reset_on_prefix_change', $configArr) ? $configArr['reset_on_prefix_change'] : false;
$resetOnPrefixChange = array_key_exists('reset_on_prefix_change', $configArr)
? $configArr['reset_on_prefix_change']
: false;
$length = $configArr['length'];

$fieldType = (new self)->getFieldType($table, $field);
preg_match("/^([\w\-]+)/", $fieldType, $type);
$tableFieldType = $type[0];
preg_match("/(?<=\().+?(?=\))/", $fieldType, $tblFieldLength);
$tableFieldLength = $tblFieldLength[0];
$fieldInfo = (new self)->getFieldType($table, $field, $connection);
$tableFieldType = $fieldInfo['type'];
$tableFieldLength = $fieldInfo['length'];

if (in_array($tableFieldType, ['int', 'bigint', 'numeric']) && !is_numeric($prefix)) {
throw new Exception("table field type is $tableFieldType but prefix is string");
if (in_array($tableFieldType, ['int', 'integer', 'bigint', 'numeric']) && ! is_numeric($prefix)) {
throw new Exception("$field field type is $tableFieldType but prefix is string");
}

if ($length > $tableFieldLength) {
throw new Exception('ID length is bigger then field length');
throw new Exception('Generated ID length is bigger then table field length');
}

$prefixLength = strlen($configArr['prefix']);
$idLength = $length - $prefixLength;
$whereString = '';

if (array_key_exists('where', $configArr)) {
$whereString .= " WHERE ";
$whereString .= ' WHERE ';
foreach ($configArr['where'] as $row) {
$whereString .= $row[0] . "=" . $row[1] . " AND ";
$whereString .= $row[0].'='.$row[1].' AND ';
}
}
$whereString = rtrim($whereString, 'AND ');


$totalQuery = sprintf("SELECT count(%s) total FROM %s %s", $field, $configArr['table'], $whereString);
$total = DB::select($totalQuery);
$totalQuery = sprintf('SELECT count(%s) total FROM %s %s', $field, $configArr['table'], $whereString);
$total = DB::connection($connection)->select(trim($totalQuery));

if ($total[0]->total) {
if ($resetOnPrefixChange) {
$maxQuery = sprintf("SELECT MAX(%s) maxId from %s WHERE %s like %s", $field, $table, $field, "'" . $prefix . "%'");
$maxIdSql = 'SELECT MAX(%s) AS maxid FROM %s WHERE %s LIKE %s';
$maxQuery = sprintf($maxIdSql, $field, $table, $field, "'".$prefix."%'");
} else {
$maxQuery = sprintf("SELECT MAX(%s) maxId from %s", $field, $table);
$maxQuery = sprintf('SELECT MAX(%s) AS maxid FROM %s WHERE %s LIKE "%s%%"', $field, $table, $field, $prefix);
}

$queryResult = DB::select($maxQuery);
$maxFullId = $queryResult[0]->maxId;
$queryResult = DB::connection($connection)->select($maxQuery);
$maxFullId = $queryResult[0]->maxid;

$maxId = substr($maxFullId, $prefixLength, $idLength);
return $prefix . str_pad($maxId + 1, $idLength, '0', STR_PAD_LEFT);
// $maxId = substr($maxFullId, $prefixLength, $idLength);
$maxId = (int)str_replace($prefix,'',$maxFullId);

return $prefix.str_pad((int) $maxId + 1, $length, '0', STR_PAD_LEFT);
} else {
return $prefix . str_pad(1, $idLength, '0', STR_PAD_LEFT);
return $prefix.str_pad(1, $length, '0', STR_PAD_LEFT);
}
}
}
}