Add list users command

src/Console/CreateDatabaseCommand.php

@@ -11,7 +11,6 @@ use Symfony\Component\Console\Question\Question;
 
 class CreateDatabaseCommand extends Command
 {
-    // the name of the command (the part after "bin/console")
     protected static $defaultName = 'app:db:create';
 
     public function __construct(

src/Console/ListDatabasesCommand.php

@@ -9,7 +9,6 @@ use Symfony\Component\Console\Output\OutputInterface;
 
 class ListDatabasesCommand extends Command
 {
-    // the name of the command (the part after "bin/console")
     protected static $defaultName = 'app:db:list';
 
     public function __construct(
@@ -19,11 +18,6 @@ class ListDatabasesCommand extends Command
         parent::__construct();
     }
 
-    protected function configure(): void
-    {
-        // ...
-    }
-
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $dbs = $this->db->listDatabases();

src/Console/ListUsersCommand.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Console;
+
+use App\Service\DatabaseManager;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class ListUsersCommand extends Command
+{
+    protected static $defaultName = 'app:users:list';
+
+    public function __construct(
+        private DatabaseManager $db,
+    )
+    {
+        parent::__construct();
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $users = $this->db->listUsers();
+
+        $output->writeln('List of users:');
+        foreach ($users as $user) {
+            $line = sprintf(' -%s @%s', $user['name'], $user['host']);
+            if (!empty($plugin = $user['plugin'])) {
+                $line .= sprintf(' (%s)', $plugin);
+            }
+
+            $output->writeln($line);
+        }
+
+        return Command::SUCCESS;
+    }
+}

src/Service/DatabaseManager.php

@@ -29,7 +29,7 @@ class DatabaseManager
     public function createDatabase(string $name)
     {
         $dbs = $this->listDatabases();
-        if(in_array($name, $dbs)) {
+        if (in_array($name, $dbs)) {
             throw new \Exception(sprintf('Database "%s" already exists', $name));
         }
 
@@ -38,4 +38,20 @@ class DatabaseManager
             throw new \Exception(sprintf('Database create error: %s', $this->conn->error));
         }
     }
+
+    public function listUsers(): array
+    {
+        $results = $this->conn->query('select * from mysql.user');
+
+        $users = [];
+        while ($result = $results->fetch_object()) {
+            $users[] = [
+                'name' => $result->User,
+                'host' => $result->Host,
+                'plugin' => $result->plugin,
+            ];
+        }
+
+        return $users;
+    }
 }