Begin transformation into classes

Grouped single PHP files with various funcitons into classes for basic, admin and system scope.

includes/class-wpliveticker2-system.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * WP Liveticker 2: Plugin system class.
+ *
+ * This file contains the derived class for the plugin's system operations.
+ *
+ * @package WPLiveticker2
+ */
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * WP Liveticker 2 system configuration.
+ *
+ */
+class WPLiveticker2_System extends WPLiveticker2 {
+
+	/**
+	 * Activation hook.
+	 *
+	 * Initializes default options.
+	 *
+	 * @return void
+	 */
+	public static function activate() {
+		// Load current options.
+		self::update_options();
+
+		// Add default settings to database.
+		$defaults = self::default_options();
+
+		if ( self::$_options['reset_settings'] ) {
+			// Reset requested, overwrite existing options with default.
+			update_option( self::OPTION, $defaults );
+		} else {
+			// Otherwise add new options.
+			add_option( self::OPTION, $defaults );
+		}
+	}
+}