New command: superhelio:gozer, the Destroyer

src/Commands/Gozer.php

@@ -0,0 +1,145 @@
+<?php
+
+namespace Superhelio\Commands\Commands;
+
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\DB;
+
+class Gozer extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'superhelio:gozer';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Force delete database tables that has your table prefix';
+
+    /**
+     * Create a new command instance.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        if (!class_exists('\\Doctrine\\DBAL\\Schema\\Schema')) {
+            $this->error('You are missing doctrine/dbal, you should add it to your project:');
+            $this->info('composer require doctrine/dbal');
+
+            return false;
+        }
+
+        $this->info('
+
+  ________                           
+ /  _____/  ____________ ___________ 
+/   \  ___ /  _ \___   // __ \_  __ \
+\    \_\  (  <_> )    /\  ___/|  | \/
+ \______  /\____/_____ \\___  >__|   
+        \/            \/    \/       
+
+        ');
+
+        $tables = [];
+
+        $dbPrefix = trim(DB::getTablePrefix());
+
+        $confirmationQuestion = 'Delete all of your database tables?';
+        if (!empty($dbPrefix)) {
+            $confirmationQuestion = sprintf(
+                'Delete your tables that begin with %s*',
+                $dbPrefix
+            );
+        }
+
+        if ($this->confirm($confirmationQuestion)) {
+            try {
+                /** @var \Doctrine\DBAL\Schema\AbstractSchemaManager $connection */
+                $connection = app('db')->connection()->getDoctrineSchemaManager();
+            } catch (\Doctrine\DBAL\Driver\PDOException $e) {
+                $this->error($e->getMessage());
+
+                return false;
+            }
+
+            try {
+                /** @var array $tables */
+                $tables = $connection->listTableNames();
+            } catch (\Exception $e) {
+                $this->error($e->getMessage());
+
+                return false;
+            }
+
+            /**
+             * Reject tables that do not have specified table prefix.
+             * We would not want to destroy other tables that might
+             * be in the same database, in "homestead" for example.
+             *
+             * @var \Illuminate\Support\Collection $tables
+             */
+            $tables = collect($tables)->reject(function ($table) use ($dbPrefix) {
+                return !starts_with($table, $dbPrefix);
+            });
+
+            /**
+             * Check that we got at least one table, bail out if not
+             */
+            if ($tables->count() < 1) {
+                $this->info('There are no tables, only Zuul.');
+                return true;
+            }
+
+            /**
+             * Bid your farewells to these tables.
+             * Last look and confirmation.
+             */
+
+            $this->info(sprintf(
+                "Tables found:\n - %s",
+                implode(",\n - ", $tables->toArray())
+            ));
+            $this->line('');
+
+            if ($this->confirm('Really delete those tables?')) {
+                /**
+                 * Fancy pants progress bar to see your tables get destroyed
+                 */
+                $bar = $this->output->createProgressBar($tables->count());
+
+                \Illuminate\Support\Facades\Schema::disableForeignKeyConstraints();
+                $tables->each(function ($table) use ($bar, $connection) {
+
+                    $connection->dropTable($table);
+
+                    $bar->advance();
+                });
+                \Illuminate\Support\Facades\Schema::enableForeignKeyConstraints();
+
+                $bar->finish();
+            }
+
+            $this->line('');
+            $this->line('');
+
+        }
+
+        $this->info('Done.');
+
+        return true;
+    }
+}

src/ServiceProvider.php

@@ -30,6 +30,7 @@ class ServiceProvider extends BaseServiceProvider
     public function register()
     {
         $this->registerReloader();
+        $this->registerGozer();
     }
 
     private function registerReloader()
@@ -39,4 +40,12 @@ class ServiceProvider extends BaseServiceProvider
         });
         $this->commands('command.superhelio.reload');
     }
+
+    private function registerGozer()
+    {
+        $this->app->singleton('command.superhelio.gozer', function ($app) {
+            return $app['Superhelio\Commands\Commands\Gozer'];
+        });
+        $this->commands('command.superhelio.gozer');
+    }
 }