add services + more structural additions

lib/User/Service/MailService.php

@@ -0,0 +1,12 @@
+<?php
+namespace Da\User\Service;
+
+use Da\User\Contracts\ServiceInterface;
+
+class MailService implements ServiceInterface
+{
+    public function run()
+    {
+        // TODO: Implement run() method.
+    }
+}

lib/User/Service/UserCreateService.php

@@ -0,0 +1,73 @@
+<?php
+namespace Da\User\Service;
+
+use Da\User\Contracts\ServiceInterface;
+use Da\User\Helper\SecurityHelper;
+use Da\User\Model\User;
+use yii\base\InvalidCallException;
+use Exception;
+use yii\log\Logger;
+
+/**
+ *
+ * UserCreateService.php
+ *
+ * Date: 4/12/16
+ * Time: 2:55
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+class UserCreateService implements ServiceInterface
+{
+    protected $model;
+    protected $securityHelper;
+    protected $logger;
+
+    public function __construct(User $model, SecurityHelper $securityHelper, Logger $logger)
+    {
+        $this->model = $model;
+        $this->securityHelper = $securityHelper;
+        $this->logger = $logger;
+    }
+
+    /**
+     * @return bool
+     */
+    public function run()
+    {
+        $model = $this->model;
+
+        if ($model->getIsNewRecord() === false) {
+            throw new InvalidCallException('Cannot create a new user from an existing one.');
+        }
+
+        $transaction = $model->getDb()->beginTransaction();
+
+        try {
+            $model->confirmed_at = time();
+            $model->password = $model->password !== null
+                ? $model->password
+                : $this->securityHelper->generatePassword(8);
+
+            // TODO: Trigger BEFORE CREATE EVENT
+
+            if (!$model->save()) {
+                $transaction->rollBack();
+
+                return false;
+            }
+
+            // TODO: Send welcome message
+
+            $transaction->commit();
+
+            return true;
+
+        } catch (Exception $e) {
+            $transaction->rollBack();
+            $this->logger->log($e->getMessage(), Logger::LEVEL_WARNING);
+
+            return false;
+        }
+    }
+
+}