New model class "host"

src/Model/Host.php

@@ -0,0 +1,79 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Model;
+
+use Friendica\Core\Logger;
+use Friendica\Database\DBA;
+
+class Host
+{
+	/**
+	 * Get the id for a given hostname
+	 * When empty, the current hostname is used
+	 *
+	 * @param string $hostname
+	 *
+	 * @return integer host name id
+	 * @throws \Exception
+	 */
+	public static function getId(string $hostname = '')
+	{
+		if (empty($hostname)) {
+			$hostname = php_uname('n');
+		}
+
+		$hostname = strtolower($hostname);
+
+		$host = DBA::selectFirst('host', ['id'], ['name' => $hostname]);
+		if (!empty($host['id'])) {
+			return $host['id'];
+		}
+
+		DBA::replace('host', ['name' => $hostname]);
+
+		$host = DBA::selectFirst('host', ['id'], ['name' => $hostname]);
+		if (empty($host['id'])) {
+			Logger::warning('Host name could not be inserted', ['name' => $hostname]);
+			return 0;
+		}
+
+		return $host['id'];
+	}
+
+	/**
+	 * Get the hostname for a given id
+	 *
+	 * @param int $id
+	 *
+	 * @return string host name
+	 * @throws \Exception
+	 */
+	public static function getName(int $id)
+	{
+		$host = DBA::selectFirst('host', ['name'], ['id' => $id]);
+		if (!empty($host['name'])) {
+			return $host['name'];
+		}
+
+		return '';
+	}
+}