Add system to retrieve and manage donations in a local database

lib/User.php

@@ -0,0 +1,50 @@
+<?
+use Ramsey\Uuid\Uuid;
+
+class User extends PropertiesBase{
+	public $UserId;
+	public $FirstName;
+	protected $DisplayFirstName = null;
+	public $LastName;
+	protected $DisplayLastName = null;
+	protected $Name = null;
+	protected $DisplayName = null;
+	public $Email;
+	protected $DisplayEmail;
+	public $Timestamp;
+	public $Uuid;
+
+	public static function Get(int $userId): ?User{
+		$result = Db::Query('select * from Users where UserId = ?', [$userId], 'User');
+
+		return $result[0] ?? null;
+	}
+
+	protected function GetName(): string{
+		if($this->Name === null){
+			$this->Name = $this->FirstName . ' ' . $this->LastName;
+		}
+
+		return $this->Name;
+	}
+
+	public function Create(): void{
+		$uuid = Uuid::uuid4();
+		$this->Uuid = $uuid->toString();
+
+		try{
+			Db::Query('insert into Users (Email, Name, Uuid, Timestamp) values (?, ?, ?, utc_timestamp());', [$this->Email, $this->Name, $this->Uuid]);
+		}
+		catch(PDOException $ex){
+			if($ex->errorInfo[1] == 1062){
+				// Duplicate unique key; email already in use
+				throw new Exceptions\UserExistsException();
+			}
+			else{
+				throw $ex;
+			}
+		}
+
+		$this->UserId = Db::GetLastInsertedId();
+	}
+}