laravel validate conditional image field - laravel

Question

i have a field that required, and can be 2 value type : String (path) and Image file
how can write validation rule for this ?
if value is string check file_exist and if is file must be image
thanks

Answer 1

Maybe there's an easier way to do this. However, I think a custom rule as such should work.
$validator = Validator::make($request->all(), [
'image' => [
'required',
function ($attribute, $value, $fail) {
if(is_file($value)) {
if (true !== mb_strpos($value->getMimeType(), "image")) {
return $fail($attribute.' is invalid.');
}
}
if (is_string($value)) {
if(! file_exists($value)) {
return $fail($attribute.' is invalid.');
}
}
},
],
]);

Answer 2

i found my answer with FormRequest
MyTestFormRequest
<?php
use Illuminate\Foundation\Http\FormRequest;
use Symfony\Component\HttpFoundation\File\UploadedFile;
class MyTestFormRequest extends FormRequest
{
public function rules()
{
$rules = [
"image" => ['required']
];
if(is_string($this->image)) {
$rules['image'][] = new FileExistsRule;
} else if($this->image instanceof UploadedFile) {
$rules['image'][] = 'image';
$rules['image'][] = 'dimensions:ratio=1/1';
}
return $rules;
}
}
FileExistsRule
<?php
use Illuminate\Contracts\Validation\Rule;
class FileExistsRule implements Rule
{
public function passes($attribute, $value)
{
return file_exists(public_path($value));
}
public function message()
{
return 'The file not exists';
}
}