fix: set Database env credentials without returning a new instance (#24)

This is a follow-up PR from #22. Instead of returning a new instance after setting the environment variables we simply do nothing. Most of the extending classes will not take advantage of the new instance anyways, and will just call `new Database()` as before. Of course, as mentioned in #22 this setup is not ideal, and another solution should be implemented to instance this class.

Reviewed-on: https://codeberg.org/vlw/scaffold/pulls/24

README.md

@@ -1,5 +1,5 @@
 # Scaffold
-This composer package contains my project boilerplate code for working with [Vegvisir](https://vegvisir.vlw.se) and [Reflect](https://reflect.vlw.se) projects. It contains my most commonly used classes and functions which I use to make development of new project in these frameworks easier.
+This composer package (primarily) contains my project boilerplate code for working with [Vegvisir](https://vegvisir.vlw.se) and [Reflect](https://reflect.vlw.se) projects. It contains my most commonly used classes and functions which I use to make development of new project in these frameworks easier.
 
 Refer to the documentation in each source file for more information about its function.
 

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "vlw/scaffold",
-    "description": "Project scaffolding for Reflect and Vegvisir projects",
+    "description": "Project scaffolding (primarily) for Reflect and Vegvisir projects",
     "type": "library",
     "license": "GPL-3.0-or-later",
     "authors": [

src/Database/Database.php

@@ -15,6 +15,37 @@
 		public const DATE_FORMAT     = "Y-m-d";
 		public const DATETIME_FORMAT = "Y-m-d H:i:s";
 
+		private const DEFAULT_HOSTNAME = "localhost";
+		private const DEFAULT_USERNAME = "www-data";
+		private const DEFAULT_PASSWORD = "";
+
+		/**
+		 * Create a new Database instance from credentials
+		 *
+		 * @param string $host
+		 * @param string $username
+		 * @param string $password
+		 * @param string $database
+		 * @return void
+		 */
+		public static function set_credentials(
+			?string $host = self::DEFAULT_HOSTNAME,
+			?string $username = self::DEFAULT_USERNAME,
+			?string $password = self::DEFAULT_PASSWORD,
+			string $database
+		) {
+			// Create key if it does not exist
+			if (!$_ENV["mariadb"]) {
+				$_ENV["mariadb"] = [];
+			}
+
+			// Set environment variables from credentials
+			$_ENV["mariadb"]["host"] = $host;
+			$_ENV["mariadb"]["user"] = $username;
+			$_ENV["mariadb"]["pass"] = $password;
+			$_ENV["mariadb"]["db"] = $database;
+		}
+
 		/**
 		 * Wrap a new vlw/MySQL instance with credentials from project .env.ini
 		 */