add model + form to handle alt names

Entity/Person.php

@@ -42,6 +42,12 @@ class Person implements HasCenterInterface {
 
     /** @var string The person's last name */
     private $lastName;
+    
+    /**
+     *
+     * @var \Doctrine\Common\Collections\Collection
+     */
+    private $altNames;
 
     /** @var \DateTime The person's birthdate */
     private $birthdate; //to change in birthdate
@@ -123,6 +129,7 @@ class Person implements HasCenterInterface {
         $this->accompanyingPeriods = new ArrayCollection();
         $this->spokenLanguages = new ArrayCollection();
         $this->addresses = new ArrayCollection();
+        $this->altNames = new ArrayCollection();
 
         if ($opening === null) {
             $opening = new \DateTime();
@@ -324,7 +331,39 @@ class Person implements HasCenterInterface {
     {
         return $this->lastName;
     }
+    
+    public function getAltNames(): \Doctrine\Common\Collections\Collection
+    {
+        return $this->altNames;
+    }
 
+    public function setAltNames(\Doctrine\Common\Collections\Collection $altNames)
+    {
+        $this->altNames = $altNames;
+        
+        return $this;
+    }
+
+    public function addAltName(PersonAltName $altName)
+    {
+        if (FALSE === $this->altNames->contains($altName)) {
+            $this->altNames->add($altName);
+            $altName->setPerson($this);
+        }
+        
+        return $this;
+    }
+    
+    public function removeAltName(PersonAltName $altName) 
+    {
+        if ($this->altNames->contains($altName)) {
+            $altName->setPerson(null);
+            $this->altNames->removeElement($altName);
+        }
+        
+        return $this;
+    }
+    
     /**
      * Set birthdate
      *