ReWork Notification Model/Module/Object/Repository/Factory

- Introduce Repository for interaction with "notify" table
- Introduce Factory for read-only notification objects (they're just loosely based on notification the table!)
- Introduce Objects for type-safe usage at the presentation layer
- Reworked Model, which is now fully based on the notify table, including generated fields (cache, ..)

src/Object/Notification/Notification.php

@@ -0,0 +1,123 @@
+<?php
+
+namespace Friendica\Object\Notification;
+
+class Notification implements \JsonSerializable
+{
+	const SYSTEM   = 'system';
+	const PERSONAL = 'personal';
+	const NETWORK  = 'network';
+	const INTRO    = 'intro';
+	const HOME     = 'home';
+
+	/** @var string */
+	private $label = '';
+	/** @var string */
+	private $link = '';
+	/** @var string */
+	private $image = '';
+	/** @var string */
+	private $url = '';
+	/** @var string */
+	private $text = '';
+	/** @var string */
+	private $when = '';
+	/** @var string */
+	private $ago = '';
+	/** @var boolean */
+	private $seen = false;
+
+	/**
+	 * @return string
+	 */
+	public function getLabel()
+	{
+		return $this->label;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getLink()
+	{
+		return $this->link;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getImage()
+	{
+		return $this->image;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getUrl()
+	{
+		return $this->url;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getText()
+	{
+		return $this->text;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getWhen()
+	{
+		return $this->when;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getAgo()
+	{
+		return $this->ago;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function isSeen()
+	{
+		return $this->seen;
+	}
+
+	public function __construct(string $label = '', string $link = '', string $image = '',
+	                            string $url = '', string $text = '',
+	                            string $when = '', string $ago = '', bool $seen = false)
+	{
+		$this->label = $label;
+		$this->link  = $link;
+		$this->image = $image;
+		$this->url   = $url;
+		$this->text  = $text;
+		$this->when  = $when;
+		$this->ago   = $ago;
+		$this->seen  = $seen;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function jsonSerialize()
+	{
+		return get_object_vars($this);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function toArray()
+	{
+		return get_object_vars($this);
+	}
+}