Finalize invoice creation and handling addresses.

app/Models/Customer.php

@@ -29,12 +29,34 @@ class Customer extends Model
      */
     protected $appends = [
         'created',
+        'street',
+        'city'
     ];
 
+    /**
+     * Deliver the customer's address as street directly with the model.
+     */
+    public function getStreetAttribute(): string
+    {
+        if (is_null($this->address)) {
+            return '';
+        }
+        return $this->address->address;
+    }
+
+    /**
+     * Deliver the customer's address as city directly with the model.
+     */
+    public function getCityAttribute(): string
+    {
+        if (is_null($this->address)) {
+            return '';
+        }
+        return $this->address->city;
+    }
+
     /**
      * Get the created_at attribute in local time format.
-     *
-     * @return string
      */
     public function getCreatedAttribute(): string
     {
@@ -43,8 +65,6 @@ class Customer extends Model
 
     /**
      * Get the invoice address.
-     *
-     * @return HasOne
      */
     public function address(): HasOne
     {
@@ -56,8 +76,6 @@ class Customer extends Model
 
     /**
      * Get the delivery address.
-     *
-     * @return HasOne
      */
     public function delivery(): HasOne
     {
@@ -69,8 +87,6 @@ class Customer extends Model
 
     /**
      * Get all customer's addresses.
-     *
-     * @return HasMany
      */
     public function addresses(): HasMany
     {