Delete install table class and move install table back into main plugin file

wc-custom-order-table.php

@@ -23,12 +23,80 @@
     require( WC_CUSTOM_ORDER_TABLE_PATH . 'vendor/autoload_52.php' );
 }
 
-function wc_custom_order_table_install() {
-    $installer = new WC_Custom_Order_Table_Install();
-    register_activation_hook( __FILE__, array( $installer, 'activate' ) );
-}
+register_activation_hook( __FILE__, array( $this, 'activate' ) );
 
-register_activation_hook( __FILE__, 'wc_custom_order_table_install' );
+public function activate() {
+		$this->maybe_install_tables();
+	}
+	public function get_latest_table_version() {
+		return absint( $this->table_version );
+	}
+	public function get_installed_table_version() {
+		return absint( get_option( 'wc_orders_table_version' ) );
+	}
+	protected function maybe_install_tables() {
+		if( $this->get_installed_table_version() < $this->get_latest_table_version() ) {
+			$this->install_tables();
+		}
+	}
+	protected function install_tables() {
+		global $wpdb;
+		require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
+		$collate = '';
+		if ( $wpdb->has_cap( 'collation' ) ) {
+			$collate = $wpdb->get_charset_collate();
+		}
+		$table = $this->get_table_name();
+		$tables = "
+		CREATE TABLE {$table} (
+		order_id BIGINT UNSIGNED NOT NULL,
+		order_key varchar(100) NOT NULL,
+		customer_id BIGINT UNSIGNED NOT NULL,
+		billing_first_name varchar(100) NOT NULL,
+		billing_last_name varchar(100) NOT NULL,
+		billing_company varchar(100) NOT NULL,
+		billing_address_1 varchar(200) NOT NULL,
+		billing_address_2 varchar(200) NOT NULL,
+		billing_city varchar(100) NOT NULL,
+		billing_state varchar(100) NOT NULL,
+		billing_postcode varchar(100) NOT NULL,
+		billing_country varchar(100) NOT NULL,
+		billing_email varchar(200) NOT NULL,
+		billing_phone varchar(200) NOT NULL,
+		shipping_first_name varchar(100) NOT NULL,
+		shipping_last_name varchar(100) NOT NULL,
+		shipping_company varchar(100) NOT NULL,
+		shipping_address_1 varchar(200) NOT NULL,
+		shipping_address_2 varchar(200) NOT NULL,
+		shipping_city varchar(100) NOT NULL,
+		shipping_state varchar(100) NOT NULL,
+		shipping_postcode varchar(100) NOT NULL,
+		shipping_country varchar(100) NOT NULL,
+		payment_method varchar(100) NOT NULL,
+		payment_method_title varchar(100) NOT NULL,
+        discount_total float NOT NULL DEFAULT 0,
+        discount_tax float NOT NULL DEFAULT 0,
+        shipping_total float NOT NULL DEFAULT 0,
+        shipping_tax float NOT NULL DEFAULT 0,
+        cart_tax float NOT NULL DEFAULT 0,
+        total float NOT NULL DEFAULT 0,
+		version varchar(16) NOT NULL,
+		currency varchar(3) NOT NULL,
+		prices_include_tax tinyint(1) NOT NULL,
+		transaction_id varchar(200) NOT NULL,
+		customer_ip_address varchar(40) NOT NULL,
+		customer_user_agent varchar(200) NOT NULL,
+		created_via varchar(200) NOT NULL,
+		date_completed datetime DEFAULT NULL,
+		date_paid datetime DEFAULT NULL,
+		cart_hash varchar(32) NOT NULL,
+		PRIMARY KEY  (order_id)
+		) $collate;
+		";
+		dbDelta( $tables );
+		update_option('wc_orders_table_version', $this->get_latest_table_version() );
+	}
+}
 
 /**
  * @return WC_Custom_Order_Table