implement class interfaces

src/Entity/Code.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Code
+class Code implements \Yggverse\Gemtext\Interface\Entity
 {
     public const TAG = '```';
 

src/Entity/Header.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Header
+class Header implements \Yggverse\Gemtext\Interface\Entity
 {
     public const TAG = '#';
 

src/Entity/Link.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Link
+class Link implements \Yggverse\Gemtext\Interface\Entity
 {
     public const TAG = '=>';
 

src/Entity/Listing.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Listing
+class Listing implements \Yggverse\Gemtext\Interface\Entity
 {
     public const TAG = '*';
 

src/Entity/Quote.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Quote
+class Quote implements \Yggverse\Gemtext\Interface\Entity
 {
     public const TAG = '>';
 

src/Entity/Text.php

@@ -4,12 +4,12 @@ declare(strict_types=1);
 
 namespace Yggverse\Gemtext\Entity;
 
-class Text
+class Text implements \Yggverse\Gemtext\Interface\Entity
 {
     private string $_data;
 
     public function __construct(
-         string $data,
+         string $data = '',
          bool $trim = false
     ) {
         $this->setData(

src/Interface/Entity.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Gemtext\Interface;
+
+interface Entity
+{
+    public function toString(): string;
+}

src/Interface/Parser.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Gemtext\Interface;
+
+interface Parser
+{
+    public static function match(
+        string $line,
+        array &$matches = []
+    ): bool;
+}