feat: admin editable email templates

addresses #869eg7ptr

src/Email/MailPlaceholderFactory.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Email;
+
+use App\Entity\Disposition;
+
+/**
+ * Builds the placeholder maps that more than one caller needs.
+ *
+ * The disposition reminder is sent both by the nightly cron and by
+ * EmailNotificationSubscriber when a contract is confirmed shortly before departure; both
+ * have to fill the same placeholders, and a map that drifts between them would show "-"
+ * in one of the two mails.
+ */
+class MailPlaceholderFactory
+{
+    public function __construct(
+        private readonly int $invoiceUploadDeadlineDays,
+    ) {
+    }
+
+    /**
+     * @return array<string, string|int|null>
+     */
+    public function forDispositionReminder(Disposition $disposition, int $diffInDays): array
+    {
+        $assignment = $disposition->getAssignment();
+        $destination = $assignment->getDestination();
+
+        return [
+            'destination' => (string) $destination,
+            'jobProfile' => $assignment->getJobProfile()?->getName(),
+            'product' => $destination->getProduct(),
+            'dateFrom' => $destination->getDateFrom()?->format('d.m.Y'),
+            'dateTo' => $destination->getDateTo()?->format('d.m.Y'),
+            'diffInDays' => $diffInDays,
+            'invoiceUploadDeadlineDays' => $this->invoiceUploadDeadlineDays,
+        ];
+    }
+}