implement absolute address converter

README.md

@@ -70,31 +70,96 @@ var_dump(
 
 ### Address
 
-Includes useful methods to work with network addresses
+Includes methods to work with network addresses.
+
+#### Base address methods
+
+Different operations with address parts:
+
+* `scheme`
+* `user`
+* `password`
+* `host`
+* `protocol`
+* `path`
+* `query`
+* `fragment`
+
+#### Address conversion from relative to absolute format
+
+**Document root**
 
 ```
+$base = new \Yggverse\Net\Address(
+    'http://yo.ygg/a1/b1/c1'
+);
+
 $address = new \Yggverse\Net\Address(
-    'http://yo.ygg'
+    '/a2'
 );
 
 var_dump(
-    $address->getScheme() // Scheme substring
+    $address->getAbsolute(
+        $base
+    ) // return http://yo.ygg/a2
+);
+```
+
+**Current folder**
+
+```
+$base = new \Yggverse\Net\Address(
+    'http://yo.ygg/a1/b1/c1'
 );
 
-...
+$address = new \Yggverse\Net\Address(
-
+    'c2'
-$subject = new \Yggverse\Net\Address(
-    './some/uri'
 );
 
 var_dump(
-    $address->absolute(
+    $address->getAbsolute(
-        $subject
+        $base
-    ) // return http://yo.ygg/some/uri
+    ) // return http://yo.ygg/a1/b1/c2
+);
+```
+
+**Ending slash**
+
+```
+$base = new \Yggverse\Net\Address(
+    'http://yo.ygg/a1/b1/c1/'
+);
+
+$address = new \Yggverse\Net\Address(
+    '../../b2/c2'
+);
+
+var_dump(
+    $address->getAbsolute(
+        $base
+    ) // return http://yo.ygg/a1/b2/c2
+);
+```
+
+**All options**
+
+```
+$base = new \Yggverse\Net\Address(
+    'http://user:password@yo.ygg/a1/b1/c1?attribute=value#anchor'
+);
+
+$address = new \Yggverse\Net\Address(
+    '../../a2/b2?attribute2=value2#anchor2'
+);
+
+var_dump(
+    $address->getAbsolute(
+        $base
+    ) // return http://user:password@yo.ygg/a2/b2?attribute2=value2#anchor2
 );
 ```
 
 ## Integrations
 
 * [Network API with native Yggdrasil/IPv6 support](https://github.com/YGGverse/web-api)
-* [Yo! Search Crawler for different networks](https://github.com/YGGverse/Yo)
+* [Yo! Crawler for different networks](https://github.com/YGGverse/Yo)

src/Address.php

@@ -15,10 +15,10 @@ class Address
     private ?string $_query = null;
     private ?string $_fragment = null;
 
-    private array $_dirs = [];
-
     private string $_separator = '/';
 
+    private array $_segments = [];
+
     public function __construct(?string $address = null)
     {
         if ($address)
@@ -39,7 +39,7 @@ class Address
 
             if ($pass = parse_url($address, PHP_URL_PASS))
             {
-                $this->setPath(
+                $this->setPass(
                     (string) $pass
                 );
             }
@@ -150,10 +150,12 @@ class Address
     {
         if (false !== strpos($value, '\\'))
         {
-            $this->_separator = '\\';
+            $this->setSeparator(
+                '\\'
+            );
         }
 
-        $this->_dirs = explode(
+        $this->_segments = explode(
             $this->_separator,
             $value
         );
@@ -161,9 +163,9 @@ class Address
         $this->_path = $value;
     }
 
-    public function getDirs(): array
+    public function getSegments(): array
     {
-        return $this->_dirs;
+        return $this->_segments;
     }
 
     public function getQuery(): ?string
@@ -191,6 +193,11 @@ class Address
         return $this->_separator;
     }
 
+    public function setSeparator(?string $value): void
+    {
+        $this->_separator = $value;
+    }
+
     public function get(): string
     {
         $address = '';
@@ -198,8 +205,10 @@ class Address
         if ($scheme = $this->getScheme())
         {
             $address .= sprintf(
-                '%s://',
+                '%s:%s%s',
-                $scheme
+                $scheme,
+                $this->getSeparator(),
+                $this->getSeparator()
             );
         }
 
@@ -210,7 +219,7 @@ class Address
                 $address .= sprintf(
                     '%s:%s@',
                     $user,
-                    pass
+                    $pass
                 );
             }
 
@@ -238,14 +247,7 @@ class Address
 
         if ($path = $this->getPath())
         {
-            $address .= sprintf(
+            $address .= $path;
-                '%s%s',
-                $this->getSeparator(),
-                trim(
-                    $path,
-                    $this->getSeparator()
-                )
-            );
         }
 
         if ($query = $this->getQuery())
@@ -267,35 +269,102 @@ class Address
         return $address;
     }
 
-    public function absolute(
+    public function getAbsolute(
-        \Yggverse\Net\Address $address
+        \Yggverse\Net\Address $base
-    ): string
+    ): ?string
     {
-        if ($address->isAbsolute())
+        if ($this->isAbsolute())
         {
-            return $address->get();
+            return $this->get();
         }
 
-        $address->setScheme(
+        if ($base->isRelative())
-            $this->getScheme()
+        {
+            return null;
+        }
+
+        $this->setScheme(
+            $base->getScheme()
         );
 
-        $address->setUser(
+        $this->setUser(
-            $this->getUser()
+            $base->getUser()
         );
 
-        $address->setPass(
+        $this->setPass(
-            $this->getPass()
+            $base->getPass()
         );
 
-        $address->setHost(
+        $this->setHost(
-            $this->getHost()
+            $base->getHost()
         );
 
-        $address->setPort(
+        $this->setPort(
-            $this->getPort()
+            $base->getPort()
         );
 
-        return ''; // @TODO
+        $this->setSeparator(
+            $base->getSeparator()
+        );
+
+        if (str_starts_with((string) $this->getPath(), $this->getSeparator()))
+        {
+            return $this->get();
+        }
+
+        if ($path = $this->getPath())
+        {
+            $prefix = array_reverse(
+                $base->getSegments()
+            );
+
+            array_shift(
+                $prefix
+            );
+
+            $navigate = true;
+
+            $postfix = [];
+
+            foreach ($this->getSegments() as $index => $segment)
+            {
+                if ($segment == '.')
+                {
+                    continue;
+                }
+
+                if ($navigate && $segment == '..')
+                {
+                    if (empty($prefix[$index]))
+                    {
+                        return null;
+                    }
+
+                    unset(
+                        $prefix[$index]
+                    );
+
+                    continue;
+                }
+
+                $navigate = false;
+
+                $postfix[] = $segment;
+            }
+
+            $this->setPath(
+                implode(
+                    $this->getSeparator(),
+                    array_merge(
+                        array_reverse(
+                            $prefix
+                        ),
+                        $postfix
+                    )
+                )
+            );
+        }
+
+        return $this->get();
     }
 }