108 lines
2.7 KiB
PHP
108 lines
2.7 KiB
PHP
<?php
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namespace App\Rules;
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use Illuminate\Contracts\Validation\Rule;
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use Illuminate\Support\Facades\DB;
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use PDO;
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class Uniqueish implements Rule
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{
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/**
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* The table name to compare.
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*
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* @var string
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*/
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protected $table;
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/**
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* The column name to compare.
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*
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* @var string|null
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*/
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protected $column;
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/**
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* The ID of the record to be ignored.
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*
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* @var mixed
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*/
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protected $ignoreId;
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/**
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* Create a new rule instance.
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*
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* @param string $table The table name to compare.
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* @param string $column The column name to compare.
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* @return void
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*/
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public function __construct(string $table, string $column = null)
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{
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$this->table = $table;
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$this->column = $column;
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}
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/**
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* Set the ID of the record to be ignored.
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*
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* @param mixed $id The ID to ignore.
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* @return $this
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*/
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public function ignore(mixed $id): static
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{
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$this->ignoreId = $id;
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return $this;
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}
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/**
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* Determine if the validation rule passes.
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*
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* @param mixed $attribute Not used.
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* @param mixed $value The value to compare.
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* @return boolean
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*/
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public function passes(mixed $attribute, mixed $value): bool
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{
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$columnName = ($this->column ?? $attribute);
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$similarValue = preg_replace('/[^A-Za-z]/', '', strtolower($value));
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try {
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$query = DB::table($this->table)
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->where($columnName, 'like', '%' . $similarValue . '%');
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if ($this->ignoreId !== null) {
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$query->where('id', '<>', $this->ignoreId);
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}
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$query->whereRaw('LOWER(REGEXP_REPLACE(' . $columnName . ', \'[^A-Za-z0-9]\', \'\')) = ?', [$similarValue]);
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$result = $query->first();
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} catch (\Illuminate\Database\QueryException $e) {
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// Fall back to performing the regex replace in PHP
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// $results = $query->get();
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$query = DB::table($this->table);
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$results = $query->get();
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foreach ($results as $result) {
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$resultValue = preg_replace('/[^A-Za-z0-9]/', '', strtolower($result->{$columnName}));
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if ($resultValue === $similarValue && $result->id != $this->ignoreId) {
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return false; // Value already exists in the table
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}
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}
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return true; // Value does not exist in the table
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}//end try
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return $result === null;
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}
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/**
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* Get the validation error message.
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*
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* @return string
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*/
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public function message(): string
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{
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return 'The :attribute is similar to one that already exists. Please choose another.';
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}
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}
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