Various code for currency exchange rate support

database/seeders/DatabaseSeeder.php

@@ -41,5 +41,6 @@ class DatabaseSeeder extends Seeder
         $this->call(LinkTypeSeeder::class);
         $this->call(ConfigSeeder::class);
         $this->call(UserRoleSeeder::class);
+        $this->call(ExchangeRateSeeder::class);
     }
 }

database/seeders/ExchangeRateSeeder.php

@@ -0,0 +1,117 @@
+<?php
+/*
+ * ExchangeRateSeeder.php
+ * Copyright (c) 2022 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+namespace Database\Seeders;
+
+use FireflyIII\Models\CurrencyExchangeRate;
+use FireflyIII\Models\TransactionCurrency;
+use FireflyIII\User;
+use Illuminate\Database\Seeder;
+use Illuminate\Support\Collection;
+use Log;
+
+/**
+ * Class ExchangeRateSeeder
+ */
+class ExchangeRateSeeder extends Seeder
+{
+    private Collection $users;
+
+    /**
+     * @return void
+     */
+    public function run(): void
+    {
+        $count = User::count();
+        if (0 === $count) {
+            Log::debug('Will not seed exchange rates yet.');
+            return;
+        }
+        $users  = User::get();
+        $date   = config('cer.date');
+        $rates  = config('cer.rates');
+        $usable = [];
+        foreach ($rates as $rate) {
+            $from = $this->getCurrency($rate[0]);
+            $to   = $this->getCurrency($rate[1]);
+            if (null !== $from && null !== $to) {
+                $usable[] = [$from, $to, $rate[2]];
+            }
+        }
+        unset($rates, $from, $to, $rate);
+
+        /** @var User $user */
+        foreach ($users as $user) {
+            foreach ($usable as $rate) {
+                if (!$this->hasRate($user, $rate[0], $rate[1], $date)) {
+                    $this->addRate($user, $rate[0], $rate[1], $date, $rate[2]);
+                }
+            }
+        }
+    }
+
+    /**
+     * @param string $code
+     * @return TransactionCurrency|null
+     */
+    private function getCurrency(string $code): ?TransactionCurrency
+    {
+        return TransactionCurrency::whereNull('deleted_at')->where('code', $code)->first();
+    }
+
+    /**
+     * @param User                $user
+     * @param TransactionCurrency $from
+     * @param TransactionCurrency $to
+     * @param string              $date
+     * @return bool
+     */
+    private function hasRate(User $user, TransactionCurrency $from, TransactionCurrency $to, string $date): bool
+    {
+        return $user->currencyExchangeRates()
+                    ->where('from_currency_id', $from->id)
+                    ->where('to_currency_id', $to->id)
+                    ->where('date', $date)
+                    ->count() > 0;
+    }
+
+    /**
+     * @param User                $user
+     * @param TransactionCurrency $from
+     * @param TransactionCurrency $to
+     * @param string              $date
+     * @param float               $rate
+     * @return void
+     */
+    private function addRate(User $user, TransactionCurrency $from, TransactionCurrency $to, string $date, float $rate): void
+    {
+        /** @var User $user */
+        CurrencyExchangeRate::create(
+            [
+                'user_id'          => $user->id,
+                'from_currency_id' => $from->id,
+                'to_currency_id'   => $to->id,
+                'date'             => $date,
+                'rate'             => $rate,
+            ]
+        );
+    }
+}