Support ipv6 in host config (#2595)

Author: GromNaN

src/Connection.php

@@ -234,9 +234,17 @@ protected function getHostDsn(array $config): string
         $hosts = is_array($config['host']) ? $config['host'] : [$config['host']];
 
         foreach ($hosts as &$host) {
-            // Check if we need to add a port to the host
-            if (strpos($host, ':') === false && ! empty($config['port'])) {
-                $host = $host.':'.$config['port'];
+            // ipv6
+            if (filter_var($host, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) {
+                $host = '['.$host.']';
+                if (! empty($config['port'])) {
+                    $host = $host.':'.$config['port'];
+                }
+            } else {
+                // Check if we need to add a port to the host
+                if (! str_contains($host, ':') && ! empty($config['port'])) {
+                    $host = $host.':'.$config['port'];
+                }
             }
         }
 

tests/ConnectionTest.php

@@ -62,6 +62,54 @@ public function dataConnectionConfig(): Generator
             ],
         ];
 
+        yield 'IPv4' => [
+            'expectedUri' => 'mongodb://1.2.3.4',
+            'expectedDatabaseName' => 'tests',
+            'config' => [
+                'host' => '1.2.3.4',
+                'database' => 'tests',
+            ],
+        ];
+
+        yield 'IPv4 and port' => [
+            'expectedUri' => 'mongodb://1.2.3.4:1234',
+            'expectedDatabaseName' => 'tests',
+            'config' => [
+                'host' => '1.2.3.4',
+                'port' => 1234,
+                'database' => 'tests',
+            ],
+        ];
+
+        yield 'IPv6' => [
+            'expectedUri' => 'mongodb://[2001:db8:3333:4444:5555:6666:7777:8888]',
+            'expectedDatabaseName' => 'tests',
+            'config' => [
+                'host' => '2001:db8:3333:4444:5555:6666:7777:8888',
+                'database' => 'tests',
+            ],
+        ];
+
+        yield 'IPv6 and port' => [
+            'expectedUri' => 'mongodb://[2001:db8:3333:4444:5555:6666:7777:8888]:1234',
+            'expectedDatabaseName' => 'tests',
+            'config' => [
+                'host' => '2001:db8:3333:4444:5555:6666:7777:8888',
+                'port' => 1234,
+                'database' => 'tests',
+            ],
+        ];
+
+        yield 'multiple IPv6' => [
+            'expectedUri' => 'mongodb://[::1],[2001:db8::1:0:0:1]',
+            'expectedDatabaseName' => 'tests',
+            'config' => [
+                'host' => ['::1', '2001:db8::1:0:0:1'],
+                'port' => null,
+                'database' => 'tests',
+            ],
+        ];
+
         yield 'Port in host name takes precedence' => [
             'expectedUri' => 'mongodb://some-host:12345',
             'expectedDatabaseName' => 'tests',