Cleaning up and bug fixing.

app/Handlers/Events/UpdateJournalConnection.php

@@ -0,0 +1,64 @@
+<?php namespace FireflyIII\Handlers\Events;
+
+use FireflyIII\Events\JournalSaved;
+use FireflyIII\Models\PiggyBankEvent;
+use FireflyIII\Models\Transaction;
+use FireflyIII\Models\TransactionJournal;
+
+class UpdateJournalConnection
+{
+
+    /**
+     * Create the event handler.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * Handle the event.
+     *
+     * @param  JournalSaved $event
+     *
+     * @return void
+     */
+    public function handle(JournalSaved $event)
+    {
+        $journal = $event->journal;
+
+        // get the event connected to this journal:
+        /** @var PiggyBankEvent $event */
+        $event      = PiggyBankEvent::where('transaction_journal_id', $journal->id)->first();
+        $piggyBank  = $event->piggyBank()->first();
+        $repetition = $piggyBank->piggyBankRepetitions()->relevantOnDate($journal->date)->first();
+
+        if (is_null($repetition)) {
+            return;
+        }
+        $amount = 0;
+        /** @var Transaction $transaction */
+        foreach ($journal->transactions()->get() as $transaction) {
+            if ($transaction->account_id === $piggyBank->account_id) {
+                // this transaction is the relevant one.
+                $amount = floatval($transaction->amount);
+            }
+        }
+
+        // update current repetition:
+        $diff = $amount - $event->amount;
+
+        $repetition->currentamount += $diff;
+        if($repetition->currentamount < 0) {
+            $repetition->currentamount = 0;
+        }
+        $repetition->save();
+
+
+        $event->amount = $amount;
+        $event->save();
+    }
+
+}