Added partial payment option

booking.partialbalance.inc

@@ -0,0 +1,91 @@
+<?php
+// $Id: booking.confirm.inc,v 0.1 2011/07/12
+
+/**
+ * Page to allow partial payment of outstanding fees
+ */
+function booking_partial_balance_page() { 
+	global $event;
+	$output = "";
+	$waiting_list = False;
+	$already_paid = false;
+	$paypal_form = "";
+	$temp_id = arg(1);
+	$partial_amount = arg(2);
+
+	//verify that arg(1) is a uuid
+	if (! preg_match('/^[0-9A-Fa-f\-]+$/', $temp_id)) {
+		//parameter from url is not what we were expecting
+		drupal_set_message("Error: Invalid session ID supplied to the partial payment page. Please use the contact us form to let us know.", 'error', FALSE);
+		drupal_goto('<front>');
+		return "";
+	}	
+	
+	//verify that arg(2) is a number
+	if (! preg_match('/^[0-9]+$/', $partial_amount)) {
+		drupal_set_message("Error: Invalid payment amount supplied to the partial payment page. Please use the contact us form to let us know.", 'error', FALSE);
+		drupal_goto('<front>');
+		return "";
+	}
+	
+	
+	//TODO: if the person says they're married, query to see if they're listed partner has already registered and paid
+	//if they have, then let the new registration person know their partner has already paid, and send them the confirmation email
+	
+	//work out the node id from the session id
+	$query = db_select('booking_person', 'p');
+	$query->condition('p.booking_tempid', $temp_id, '=')
+		->fields('p', array('nid'));
+	$person = $query->execute()
+		->fetchObject();	
+
+	if ($person) 
+	{
+		//load all the fields
+		$node = node_load($person->nid);		
+		//calculate the invoice ID
+		$invoiceid = $person->nid . '_bal' . REQUEST_TIME . '_' . $node->booking_lastname . '-' . $node->booking_firstname;
+		//maximum length for invoice id in paypal is 127 characters so truncate if necessary
+		$invoiceid = substr($invoiceid, 0, 126);
+	//there was no matching session id in the database		
+	} else {
+		drupal_set_message("Unable to find matching session ID " . $temp_id, 'error', FALSE);
+		drupal_goto('<front>');
+		return "";
+	}	
+	
+	//populate tokens
+	$tokens = booking_define_personspecific_tokens($node);		
+	
+	//check they're not trying to pay too much
+	if ($partial_amount > $tokens['paypal-total-amount'])
+	{
+		//just use the normal amount instead
+		$partial_amount = $tokens['paypal-total-amount'];
+	}
+	
+	//generate the paypal form
+	$tokens['paypal-total-form'] = _booking_paypal_form($node, $invoiceid, $partial_amount, "Pay $" . $partial_amount);	
+	
+	//If the amount outstanding is zero, then display information to that effect.	
+	if ($tokens['paypal-total-amount'] == 0)
+	{
+		$output = token_replace(variable_get('booking_regn_balance_page_paid'), $tokens);
+	}	
+	else
+	{
+		$output = token_replace(variable_get('booking_regn_partial_balance_page'), $tokens);
+		//optional additional text for married people
+		if ($node->booking_married == 'Y')
+			$output .= token_replace(variable_get('booking_regn_balance_married_text'), $tokens);		
+	}
+
+	//put all the bits together
+	$return_array[] = array('paragraph' => array('#type' => 'markup', '#markup' => $output));
+	//$return_array[] = array('form' => $paypal_form);
+
+	//return the form
+	return $return_array;
+
+}
+