Add new paradigm classes for notify

- Create BaseDepository class
- Create Entity, Collection, Factory and Depository classes
- Create FormattedNotification Entity, Collection and Factory to remove business logic from Notify repository
- Create new NotificationCreationIntercepted exception to allow addons to cancel notification creation
- Remove unused frio notifications/notify.tpl template

src/BaseDepository.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Friendica;
+
+use Exception;
+use Friendica\Capabilities\ICanCreateFromTableRow;
+use Friendica\Database\Database;
+use Friendica\Network\HTTPException\NotFoundException;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Depositories are meant to store and retrieve Entities from the database.
+ *
+ * The reason why there are methods prefixed with an underscore is because PHP doesn't support generic polymorphism
+ * which means we can't direcly overload base methods and make parameters more strict (from a parent class to a child
+ * class for example)
+ *
+ * Similarly, we can't make an overloaded method return type more strict until we only support PHP version 7.4 but this
+ * is less pressing.
+ */
+abstract class BaseDepository
+{
+	const LIMIT = 30;
+
+	/**
+	 * @var string This should be set to the main database table name the depository is using
+	 */
+	protected static $table_name;
+
+	/** @var Database */
+	protected $db;
+
+	/** @var LoggerInterface */
+	protected $logger;
+
+	/** @var ICanCreateFromTableRow */
+	protected $factory;
+
+	public function __construct(Database $database, LoggerInterface $logger, ICanCreateFromTableRow $factory)
+	{
+		$this->db      = $database;
+		$this->logger  = $logger;
+		$this->factory = $factory;
+	}
+
+
+	/**
+	 * @param array $condition
+	 * @param array $params
+	 * @return BaseCollection
+	 * @throws Exception
+	 */
+	protected function _select(array $condition, array $params = []): BaseCollection
+	{
+		$rows = $this->db->selectToArray(static::$table_name, [], $condition, $params);
+
+		$Entities = new BaseCollection();
+		foreach ($rows as $fields) {
+			$Entities[] = $this->factory->createFromTableRow($fields);
+		}
+
+		return $Entities;
+	}
+
+	/**
+	 * @param array $condition
+	 * @param array $params
+	 * @return BaseEntity
+	 * @throws NotFoundException
+	 */
+	protected function _selectOne(array $condition, array $params = []): BaseEntity
+	{
+		$fields = $this->db->selectFirst(static::$table_name, [], $condition, $params);
+		if (!$this->db->isResult($fields)) {
+			throw new NotFoundException();
+		}
+
+		return $this->factory->createFromTableRow($fields);
+	}
+
+	/**
+	 * @param array $condition
+	 * @param array $params
+	 * @return int
+	 * @throws Exception
+	 */
+	public function count(array $condition, array $params = []): int
+	{
+		return $this->db->count(static::$table_name, $condition, $params);
+	}
+
+	/**
+	 * @param array $condition
+	 * @return bool
+	 * @throws Exception
+	 */
+	public function exists(array $condition): bool
+	{
+		return $this->db->exists(static::$table_name, $condition);
+	}
+}