Added skeleton code to start the plugin with some settings.

Author: Chris Gårdenberg

class-edu-klarnacheckout.php

@@ -0,0 +1,60 @@
+<?php
+defined( 'ABSPATH' ) || die( 'This plugin must be run within the scope of WordPress.' );
+
+if ( ! class_exists( 'EDU_KlarnaCheckout' ) ) {
+	class EDU_KlarnaCheckout extends EDU_Integration {
+		public function __construct() {
+			$this->id          = 'eduadmin-klarnacheckout';
+			$this->displayName = __( 'Klarna Checkout', 'eduadmin-wp-klarna-checkout' );
+			$this->description = '';
+
+			$this->init_form_fields();
+			$this->init_settings();
+
+			add_action( 'eduadmin-checkpaymentplugins', array( $this, 'intercept_booking' ) );
+			add_action( 'eduadmin-processbooking', array( $this, 'process_booking' ) );
+			add_action( 'wp_loaded', array( $this, 'process_klarnaresponse' ) );
+		}
+
+		public function intercept_booking() {
+			if ( 'no' === $this->get_option( 'enabled', 'no' ) ) {
+				return;
+			}
+		}
+
+		public function process_booking() {
+			if ( 'no' === $this->get_option( 'enabled', 'no' ) ) {
+				return;
+			}
+		}
+
+		public function process_klarnaresponse() {
+			if ( 'no' === $this->get_option( 'enabled', 'no' ) ) {
+				return;
+			}
+		}
+
+		public function init_form_fields() {
+			$this->setting_fields = array(
+				'enabled'  => array(
+					'title'       => __( 'Enabled', 'edauadmin-wp-klarna-checkout' ),
+					'type'        => 'checkbox',
+					'description' => __( 'Enables/Disabled the integration with Klarna Checkout', 'eduadmin-wp-klarna-checkout' ),
+					'default'     => 'no',
+				),
+				'username' => array(
+					'title'       => __( 'Username (UID)', 'eduadmin-wp-klarna-checkout' ),
+					'type'        => 'text',
+					'description' => __( 'The API credential username from Klarna', 'eduadmin-wp-klarna-checkout' ),
+					'default'     => '',
+				),
+				'password' => array(
+					'title'       => __( 'Password', 'eduadmin-wp-klarna-checkout' ),
+					'type'        => 'password',
+					'description' => __( 'Password for the API credentials from Klarna', 'eduadmin-wp-klarna-checkout' ),
+					'default'     => '',
+				),
+			);
+		}
+	}
+}

eduadmin-wp-klarna-checkout.php

@@ -28,3 +28,43 @@
 	You should have received a copy of the GNU General Public License
 	along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
+
+add_action( 'admin_init', function () {
+	if ( is_admin() && current_user_can( 'activate_plugins' ) && ( ! is_plugin_active( 'eduadmin-booking/eduadmin.php' ) && ! is_plugin_active( 'eduadmin/eduadmin.php' ) ) ) {
+		add_action( 'admin_notices', function () {
+			?>
+            <div class="error">
+                <p><?php esc_html_e( 'This plugin requires the EduAdmin-WordPress-plugin to be installed and activated.', 'eduadmin-wp-klarna-checkout' ); ?></p>
+            </div>
+			<?php
+		} );
+		deactivate_plugins( plugin_basename( __FILE__ ) );
+		if ( isset( $_GET['activate'] ) ) {
+			unset( $_GET['activate'] );
+		}
+	}
+} );
+
+if ( ! class_exists( 'EDU_KlarnaCheckout_Loader' ) ) {
+	final class EDU_KlarnaCheckout_Loader {
+		public function __construct() {
+			add_action( 'plugins_loaded', array( $this, 'init' ) );
+		}
+
+		public function init() {
+			if ( class_exists( 'EDU_Integration' ) ) {
+				require_once __DIR__ . '/class-edu-klarnacheckout.php';
+
+				add_filter( 'edu_integrations', array( $this, 'add_integration' ) );
+			}
+		}
+
+		public function add_integration( $integrations ) {
+			$integrations[] = 'EDU_KlarnaCheckout';
+
+			return $integrations;
+		}
+	}
+
+	$edu_klarnacheckout_loader = new EDU_KlarnaCheckout_Loader();
+}