Add an invoice-creating activity based on a lead or deal

This example demonstrates how you can generate your own activity in Bitrix24 that creates an invoice based on a lead or deal

 
update path $handlerUrl for a file that registers an activity with your path for the file executing the activity :  

 
<?
$handlerUrl = 'https://yourdomain.yyy/handler.php';
$result = CRest::call(
	'bizproc.activity.add',
	[
		'CODE' => 'activityAccount',
		'HANDLER' => $handlerUrl,
		'AUTH_USER_ID' => 1,
		'NAME' => 'ActivityAccount',
		'DESCRIPTION' => 'description',
		'PROPERTIES' => [
			'account_title' => [
				'Name' => 'Format account title',
				'Description' => '',
				'Type' => 'string',
				'Required' => 'Y',
				'Multiple' => 'N',
				'Default' => 'Account title',
			],

			'my_company_id' => [
				'Name' => 'My Company id',
				'Description' => '',
				'Type' => 'int',
				'Required' => 'Y',
				'Multiple' => 'N',
				'Default' => '1',
			],

			'pay_system_id' => [
				'Name' => 'Pay system id',
				'Description' => '',
				'Type' => 'int',
				'Required' => 'Y',
				'Multiple' => 'N',
				'Default' => '1',
			],
		]
	]
);
?>

activity handler with path you have specified in the variable $handlerUrl above:

<?
$my_company_id = intVal($_REQUEST['properties']['my_company_id']);
$pay_system_id = intVal($_REQUEST['properties']['pay_system_id']);//some in CRest::call('sale.paysystem.list')
$account_title = htmlspecialchars($_REQUEST['properties']['account_title']);
$arDocument = $_REQUEST['document_id'];
$iDealID = 0;
$iLeadID = 0;
if (is_array($arDocument))
{
	foreach ($arDocument as $param)
	{//search id
		if (strpos($param, 'DEAL_') !== false)
		{
			$iDealID = intVal(substr($param, strlen('DEAL_')));
			break;
		}
		elseif (strpos($param, 'LEAD_') !== false)
		{
			$iLeadID = intVal(substr($param, strlen('LEAD_')));
			break;
		}
	}
}
if ($iDealID > 0)
{
	$result = CRest::call(
		'crm.deal.get',
		[
			'id' => $iDealID
		]
	);
	if (!empty($result['result']))
	{
		$arData = $result['result'];
		$resultProduct = CRest::call(
			'crm.deal.productrows.get',
			[
				'id' => $iDealID
			]
		);
	}
}
elseif ($iLeadID > 0)
{
	$result = CRest::call(
		'crm.lead.get',
		[
			'id' => $iLeadID
		]
	);
	if (!empty($result['result']))
	{
		$arData = $result['result'];
		$resultProduct = CRest::call(
			'crm.lead.productrows.get',
			[
				'id' => $iLeadID
			]
		);
	}
}
if (!empty($arData['COMPANY_ID']) || !empty($arData['CONTACT_ID']))
{
	if (empty($resultProduct['result']))
	{//if the deal or lead has no products
		$resultProduct['result'][] = [
			'ID' => 0,
			'PRODUCT_ID' => 0,
			'PRODUCT_NAME' => $account_title,
			'QUANTITY' => 1,
			'PRICE' => ($arData['OPPORTUNITY'])?:0,
		];
	}
	$arProduct = [];
	foreach ($resultProduct['result'] as $product)
	{
		$arProduct[] = [
			'ID' => $product['ID'],
			'PRODUCT_ID' => $product['PRODUCT_ID'],
			'PRODUCT_NAME' => $product['PRODUCT_NAME'],
			'QUANTITY' => $product['QUANTITY'],
			'PRICE' => $product['PRICE']
		];
	}

	$resultInvoice = CRest::call(
		'crm.invoice.add',
		[
			'fields' => [
				'ORDER_TOPIC' => $account_title,
				'UF_COMPANY_ID' => $arData['COMPANY_ID'],
				'UF_CONTACT_ID' => $arData['CONTACT_ID'],
				'UF_DEAL_ID' => $arData['ID'],
				'UF_MYCOMPANY_ID' => $my_company_id,
				'PERSON_TYPE_ID' => ($arData['COMPANY_ID'] > 0) ? 1 : 2,//1 is company, 2 is contact in CRest::call('crm.persontype.list')
				'PAY_SYSTEM_ID' => $pay_system_id,
				"STATUS_ID" => "N",
				'DATE_INSERT' => date(DATE_ATOM),
				'DATE_BILL' => date(DATE_ATOM),
				'DATE_PAY_BEFORE' => date(DATE_ATOM, time() + 3600 * 24 * 20),//20 day pay
				'PRODUCT_ROWS' => $arProduct,
			]
		]
	);
}

?>