Added first tokens

src/Concerns/Tokens.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rudashi\Concerns;
+
+trait Tokens
+{
+    public function exactly(string $value): static
+    {
+        $this->pattern[] = $this->sanitize($value);
+
+        return $this;
+    }
+
+    public function letter(): static
+    {
+        $this->pattern[] = '[a-zA-Z]';
+
+        return $this;
+    }
+
+    public function letters(): static
+    {
+        $this->pattern[] = '[a-zA-Z]+';
+
+        return $this;
+    }
+
+    public function lowerLetter(): static
+    {
+        $this->pattern[] = '[a-z]';
+
+        return $this;
+    }
+
+    public function lowerLetters(): static
+    {
+        $this->pattern[] = '[a-z]+';
+
+        return $this;
+    }
+}

src/FluentBuilder.php

@@ -4,8 +4,12 @@
 
 namespace Rudashi;
 
+use Rudashi\Concerns\Tokens;
+
 class FluentBuilder
 {
+    use Tokens;
+
     protected string $context = '';
     /**
      * @var array<int, string>
@@ -35,4 +39,9 @@ public function setContext(string $string): static
 
         return $this;
     }
+
+    protected function sanitize(string $value): string
+    {
+        return $value !== '' ? preg_quote($value, '/') : $value;
+    }
 }

tests/Unit/TokensTest.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+it('can add a `exactly` token', function () {
+    $regex = fluentBuilder()->exactly('foo bar');
+
+    expect($regex->get())
+        ->toBe('/foo bar/');
+});
+
+it('can add a `letter` token', function () {
+    $regex = fluentBuilder()->letter();
+
+    expect($regex->get())
+        ->toBe('/[a-zA-Z]/');
+});
+
+it('can add a `letters` token', function () {
+    $regex = fluentBuilder()->letters();
+
+    expect($regex->get())
+        ->toBe('/[a-zA-Z]+/');
+});
+
+it('can add a `lowerLetter` token', function () {
+    $regex = fluentBuilder()->lowerLetter();
+
+    expect($regex->get())
+        ->toBe('/[a-z]/');
+});
+
+it('can add a `lowerLetters` token', function () {
+    $regex = fluentBuilder()->lowerLetters();
+
+    expect($regex->get())
+        ->toBe('/[a-z]+/');
+});