Added a comand for checking if user email exist in api and MW user tables

app/Console/Commands/User/CheckUserEmailExist.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Console\Commands\User;
+
+use App\User;
+use Illuminate\Console\Command;
+use PDO;
+
+class CheckUserEmailExist extends Command {
+    protected $signature = 'wbs-user:check-email {emails*}';
+
+    protected $description = 'Check if emails exist in apidb.users or any MediaWiki user table';
+
+    public function handle(): int {
+        $emails = $this->argument('emails');
+
+        $manager = app()->db;
+        $manager->purge('mw');
+        $mwConn = $manager->connection('mw');
+        $pdo = $mwConn->getPdo();
+
+        $dbStmt = $pdo->query("SHOW DATABASES LIKE 'mwdb_%'");
+        $mwDatabases = $dbStmt->fetchAll(PDO::FETCH_COLUMN);
+
+        foreach ($emails as $email) {
+            $found = false;
+
+            // Check apidb.users
+            if (User::whereEmail($email)->exists()) {
+                $this->line("FOUND: {$email} in apidb.users");
+                $found = true;
+            }
+
+            // Check MediaWiki databases
+            foreach ($mwDatabases as $dbName) {
+                // fetch user table name
+                $tableStmt = $pdo->prepare("
+                    SELECT TABLE_NAME
+                    FROM INFORMATION_SCHEMA.TABLES
+                    WHERE TABLE_SCHEMA = :db
+                      AND TABLE_NAME LIKE '%\_user'
+                    LIMIT 1
+                ");
+                $tableStmt->execute(['db' => $dbName]);
+                $userTable = $tableStmt->fetchColumn();
+                if (!$userTable) {
+                    continue;
+                }
+
+                $query = "
+                    SELECT user_id
+                    FROM {$dbName}.{$userTable}
+                    WHERE user_email = :email
+                    LIMIT 1
+                ";
+
+                $emailStmt = $pdo->prepare($query);
+                $emailStmt->execute(['email' => $email]);
+
+                if ($emailStmt->fetch()) {
+                    $this->line("FOUND: {$email} in {$dbName}.{$userTable}");
+                    $found = true;
+                }
+            }
+
+            if (!$found) {
+                $this->line("NOT FOUND: {$email}");
+            }
+
+            $this->line('--------------------------------------------------');
+        }
+
+        return 0;
+    }
+}

tests/Commands/User/CheckUserEmailExistTest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Tests\Commands;
+
+use App\User;
+use Tests\TestCase;
+
+class CheckUserEmailExistTest extends TestCase {
+    public function testItFindsEmailInApidbUsersTable() {
+        User::factory()->create([
+            'email' => 'user@example.com',
+        ]);
+
+        // Act & Assert
+        $this->artisan('wbs-user:check-email', ['emails' => ['user@example.com']])
+            ->expectsOutput('FOUND: user@example.com in apidb.users')
+            ->assertExitCode(0);
+    }
+
+    public function testItReturnsNotFoundIfEmailDoesNotExist() {
+        $this->artisan('wbs-user:check-email', ['emails' => ['nonexistent@example.com']])
+            ->expectsOutput('NOT FOUND: nonexistent@example.com')
+            ->assertExitCode(0);
+    }
+}