refactor: replace custom CRM with Monica fork

app/Services/Contact/Conversation/AddMessageToConversation.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This is a single action class, totally inspired by
+ * https://medium.com/@remi_collin/keeping-your-laravel-applications-dry-with-single-action-classes-6a950ec54d1d.
+ */
+
+namespace App\Services\Contact\Conversation;
+
+use App\Services\BaseService;
+use App\Models\Contact\Contact;
+use App\Models\Contact\Message;
+use App\Models\Contact\Conversation;
+
+class AddMessageToConversation extends BaseService
+{
+    /**
+     * Get the validation rules that apply to the service.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'account_id' => 'required|integer|exists:accounts,id',
+            'contact_id' => 'required|integer|exists:contacts,id',
+            'conversation_id' => 'required|integer|exists:conversations,id',
+            'written_at' => 'required|date',
+            'written_by_me' => 'required|boolean',
+            'content' => 'required|string',
+        ];
+    }
+
+    /**
+     * Add message to a conversation.
+     *
+     * @param  array  $data
+     * @return Message
+     */
+    public function execute(array $data): Message
+    {
+        $this->validate($data);
+
+        $contact = Contact::where('account_id', $data['account_id'])
+                ->findOrFail($data['contact_id']);
+
+        $contact->throwInactive();
+
+        Conversation::where('contact_id', $data['contact_id'])
+                    ->where('account_id', $data['account_id'])
+                    ->findOrFail($data['conversation_id']);
+
+        return Message::create($data);
+    }
+}