[5.8] Change some methods related to validation from being protected to being public

[crlcu]

Make the following methods public:

1. Illuminate\Validation\Concerns\ValidatesAttributes

   • parseTable
   • getQueryColumn
   • requireParameterCount

2. Illuminate\Validation\DatabasePresenceVerifier

   • table

3. Illuminate\Validation\Validator

   • getPresenceVerifierFor

Making these methods public will allow users write some nice custom validation methods that implies database checks, such as this one:

In this example the user is specifying the table(customers), the column to search(name), the percentage(85) and how many records to inspect(5).

$rules = ['name' => ['required', 'similarity:customers,name,85,5']];

Validator::extend('similarity', function ($attribute, $value, $parameters, $validator) {
    $validator->requireParameterCount(3, $parameters, 'similarity');

    [$connection, $table] = $validator->parseTable($parameters[0]);
    $percent = $parameters[2];
    $limit = $parameters[3] ?? 5;

    // The second parameter position holds the name of the column that needs to
    // be verified as unique. If this parameter isn't specified we will just
    // assume that this column to be verified shares the attribute's name.
    $column = $validator->getQueryColumn($parameters, $attribute);

    // The presence verifier is responsible for counting rows within this store
    // mechanism which might be a relational database or any other permanent
    // data store like Redis, etc. We will use it to determine uniqueness.
    $verifier = $validator->getPresenceVerifierFor($connection);

    $similarities = $verifier->table($table)->where($column, 'like', '%' . str_replace(' ', '%', $value) . '%')
        ->limit($limit)
        ->get()
        ->filter(function ($item) use($percent, $column, $value) {
            $found = 0;
            $similar = similar_text($item->$column, $value, $found);

            return $found >= $percent;
        });

    return count($similarities) == 0;
});

[mfn]

Can you please add a test making use of these newly public methods?