add cleanup logic

sophi.php

@@ -93,6 +93,45 @@ function() {
 	}
 );
 
+add_action(
+	'plugin_loaded',
+	function( $plugin ) {
+		/** Return if the plugin is not Sophi. */
+		if ( 'sophi.php' !== basename( $plugin ) ) {
+			return;
+		}
+
+		$version_key     = 'sophi_version';
+		$current_version = get_transient( $version_key );
+
+		if ( false === $current_version ) {
+			$current_version = get_option( $version_key, false );
+
+			if ( false !== $current_version ) {
+				set_transient( $version_key, $current_version );
+			}
+		}
+
+		if ( SOPHI_WP_VERSION === $current_version ) {
+			return;
+		}
+
+		if ( false === $current_version || version_compare( $current_version, SOPHI_WP_VERSION, '<' ) ) {
+
+			/** Cleanup logic before setting the new version of the plugin. */
+			delete_option( 'sophi_site_automation_access_token' );
+
+			$sophi_settings = get_option( 'sophi_settings' );
+			unset( $sophi_settings['client_id'] );
+			unset( $sophi_settings['client_secret'] );
+
+			update_option( 'sophi_settings', $sophi_settings );
+			update_option( $version_key, SOPHI_WP_VERSION, true );
+			set_transient( $version_key, SOPHI_WP_VERSION );
+		}
+	}
+);
+
 /**
  * Sophi HTTPS notice.
  */