Add support for postgres schema

src/TenantDatabaseManagers/PostgreSQLSchemaManager.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Stancl\Tenancy\TenantDatabaseManagers;
+
+use Illuminate\Contracts\Config\Repository;
+use Illuminate\Database\DatabaseManager as IlluminateDatabaseManager;
+use Stancl\Tenancy\Contracts\TenantDatabaseManager;
+
+class PostgreSQLSchemaManager implements TenantDatabaseManager
+{
+    /** @var \Illuminate\Database\Connection */
+    protected $database;
+
+    public function __construct(Repository $config, IlluminateDatabaseManager $databaseManager)
+    {
+        $this->database = $databaseManager->connection($config['tenancy.database_manager_connections.schema']);
+    }
+
+    public function createDatabase(string $name): bool
+    {
+        return $this->database->statement("CREATE SCHEMA \"$name\"");
+    }
+
+    public function deleteDatabase(string $name): bool
+    {
+        return $this->database->statement("DROP SCHEMA \"$name\"");
+    }
+
+    public function databaseExists(string $name): bool
+    {
+        return (bool) $this->database->select("SELECT schema_name FROM information_schema.schemata WHERE schema_name = '$name'");
+    }
+}