Refactor upgrade and verify commands.

app/Console/Commands/Correction/DeleteZeroAmount.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * DeleteZeroAmount.php
+ * Copyright (c) 2019 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace FireflyIII\Console\Commands\Correction;
+
+use FireflyIII\Models\TransactionJournal;
+use FireflyIII\Models\Transaction;
+use Illuminate\Console\Command;
+use Illuminate\Support\Collection;
+use Exception;
+
+/**
+ * Class DeleteZeroAmount
+ */
+class DeleteZeroAmount extends Command
+{
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Delete transactions with zero amount.';
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'firefly-iii:delete-zero-amount';
+
+    /**
+     * Execute the console command.
+     * @throws Exception
+     * @return int
+     */
+    public function handle(): int
+    {
+        $set = Transaction::where('amount', 0)->get(['transaction_journal_id'])->pluck('transaction_journal_id')->toArray();
+        $set = array_unique($set);
+        /** @var Collection $journals */
+        $journals = TransactionJournal::whereIn('id', $set)->get();
+        /** @var TransactionJournal $journal */
+        foreach ($journals as $journal) {
+            $this->info(sprintf('Deleted transaction #%d because the amount is zero (0.00).', $journal->id));
+            $journal->delete();
+            Transaction::where('transaction_journal_id', $journal->id)->delete();
+        }
+        if (0 === $journals->count()) {
+            $this->info('No zero-amount transactions.');
+        }
+
+        return 0;
+    }
+}