Pony.fm/app/Console/Commands/MergeAccounts.php

<?php

/**
 * Pony.fm - A community for pony fan music.
 * Copyright (C) 2016 Feld0.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace App\Console\Commands;

use App\Commands\MergeAccountsCommand;
use App\Models\Album;
use App\Models\Comment;
use App\Models\Favourite;
use App\Models\Follower;
use App\Models\Image;
use App\Models\PinnedPlaylist;
use App\Models\Playlist;
use App\Models\ResourceLogItem;
use App\Models\ResourceUser;
use App\Models\Track;
use App\Models\User;
use Carbon\Carbon;
use DB;
use Illuminate\Console\Command;
use Illuminate\Support\Collection;

class MergeAccounts extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'accounts:merge
                            {sourceAccountId : ID of the source account (the one being disabled and having content transferred out of it)}
                            {destinationAccountId : ID of the destination account (the one gaining content)}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Merges two accounts';

    /**
     * Create a new command instance.
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $sourceAccountId = $this->argument('sourceAccountId');
        $destinationAccountId = $this->argument('destinationAccountId');

        $sourceAccount = User::find($sourceAccountId);
        $destinationAccount = User::find($destinationAccountId);

        // Sanity checks
        if (null !== $sourceAccount->getAccessToken()) {
            $this->warn("WARNING: The source account (ID {$sourceAccountId}) is linked to a Poniverse account! Normally, the destination account should be the one that's linked to a Poniverse account as that's the one that the artist will be logging into.");
            $this->line('');
            $this->warn('If you continue with this merge, the Poniverse account linked to the source Pony.fm account will no longer be able to log into Pony.fm.');
            if (! $this->confirm('Continue merging this set of source and destination accounts?')) {
                $this->error('Merge aborted.');

                return 1;
            }
        }

        if (null === $destinationAccount->getAccessToken()) {
            $this->warn("WARNING: The destination account (ID {$destinationAccountId}) is not linked to a Poniverse account!");
            $this->warn("This is normal if you're merging two archived profiles but not if you're helping an artist claim their profile.");
            if (! $this->confirm('Continue merging this set of source and destination accounts?')) {
                $this->error('Merge aborted.');

                return 1;
            }
        }

        $this->info("Merging {$sourceAccount->display_name} ({$sourceAccountId}) into {$destinationAccount->display_name} ({$destinationAccountId})...");

        $command = new MergeAccountsCommand($sourceAccount, $destinationAccount);
        $command->execute();

        return 0;
    }
}