modules/invoice/invoice_helpers.inc

<?php
// $Id$

/**
 * @file
 * Invoice module
 * 
 * This module was developed by Platina Designs, http://www.platinadesigns.nl
 *
 * @author Pieter Vogelaar <ps.vogelaar@platinadesigns.nl>
 */

/**
 * Helper function to calculate invoice totals
 * 
 * The ROUND() function of MySQL is not very reliable, especially in MySQL 4.x,
 * that's why this function came into play
 * 
 * @param integer $invoice_number
 * @param integer $user_id
 * 
 * @return array $a_totals
 */
function _invoice_get_invoice_totals($invoice_number, $user_id=0) {
  $a_totals = array();
  $sql_user_addition = '';
  
  if ($user_id > 0) {
    $sql_user_addition = ' AND uid="'. intval($user_id) .'"';
  }
  
  $result = db_query("SELECT vat,quantity*unitcost as extotal,
    (quantity*unitcost)*((vat / 100) +1) as inctotal,
    (quantity*unitcost)*((vat / 100) +1) * (1 - (1 / ((vat / 100) +1))) as vattotal
    FROM {invoice_items}
    WHERE invoice_id=%d" . $sql_user_addition,
    $invoice_number
  );
  
  while ($row = db_fetch_object($result)) {
    $a_totals['extotal'] += _invoice_round($row->extotal, 2);
    $a_totals['inctotal'] += ($row->extotal * _invoice_vat_percent_to_decimal($row->vat));
    $a_totals['vattotal'] += $row->vattotal;
  }

  $a_totals['extotal'] = _invoice_round($a_totals['extotal'], 2);
  $a_totals['inctotal'] = _invoice_round($a_totals['inctotal'], 2);
  $a_totals['vattotal'] = _invoice_round($a_totals['vattotal'], 2);
  
  return $a_totals;
}

/**
 * Converts a VAT value in percent to decimal
 * 
 * For examle:
 * A vat value of 20,5 will be converted into 1.205
 * 
 * @param mixed $vat
 */
function _invoice_vat_percent_to_decimal($percent_vat) {
	$decimal_vat = 1 + ($percent_vat / 100);
	return $decimal_vat;
}

/**
 * Helper function to easily get the name of the chosen template when adding an invoice
 */
function _invoice_get_chosen_template() {
  return !isset($_SESSION['invoice_template']) || empty($_SESSION['invoice_template']) ? variable_get('invoice_default_template', 'default') : $_SESSION['invoice_template'];
}

/**
 * Helper function to get the invoice in HTML format
 */
function _invoice_get_html($invoice_number, $type='print') {
  $nid = db_result(db_query("SELECT nid FROM {invoice_invoices} WHERE iid=%d", $invoice_number));
  $node = node_load($nid);
    
  $html = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
  <html xmlns="http://www.w3.org/1999/xhtml" lang="nl" xml:lang="nl" dir="ltr">
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-15" />
  ';
  $html = '<html><head>';
  $html .= '<link type="text/css" rel="stylesheet" media="all" href="http://'. $_SERVER['HTTP_HOST'] . base_path() . drupal_get_path('module', 'invoice') .'/templates/'. $node->invoice['template'] .'.css" />';
  $html .= '</head><body><div class="'. $type .'">';

  $html .= theme('invoice_body', $node, $type);

  // The eurosign is not supported as applicable character, so replace it with a ascii code
  $html = str_replace('€', '&#0128;', $html);
  
  $html .= '</div></body></html>';
  return $html;
}

/**
 * Helper function to get invoice id
 *
 * @return integer
 */
function _invoice_get_new_invoice_number($user_defined_invoice_number_check=FALSE) {
  if ($user_defined_invoice_number_check == TRUE) {
    $count = db_result(db_query("SELECT COUNT(*) FROM {invoice_invoices}"));
    if ($count == 0) {
      return 0;
    }
    else {
      return db_result(db_query("SELECT iid FROM {invoice_invoices} ORDER BY nid DESC LIMIT 1"));
    }
  }

  $new_invoice_number = db_result(db_query("SELECT iid FROM {invoice_invoices} ORDER BY nid DESC LIMIT 1")) + 1;
   
  return $new_invoice_number;
}

/**
 * Helper function get a formatted invoice number
 *
 * @param integer $invoice_number
 * @param mixed $formatted_invoice_number
 */
function _invoice_get_formatted_invoice_number($invoice_number, $node = NULL) {
	$formatted_invoice_number = $invoice_number;
	
	if (is_null($node)) {
		$invoice_settings = db_fetch_array(db_query("SELECT leading_zeros,prefix FROM {invoice_invoices} WHERE iid=%d", $invoice_number));
		
		$invoice_number_zerofill = $invoice_settings['leading_zeros'];
		$invoice_number_prefix = $invoice_settings['prefix'];
	}
	else {
		$invoice_number_zerofill = $node->invoice_invoice_number_zerofill;
		$invoice_number_prefix = $node->invoice_invoice_number_prefix;
	}
	
	// Add leading zeros
	$formatted_invoice_number = sprintf("%0". $invoice_number_zerofill ."d", $formatted_invoice_number);
	
	// Add prefix
	$prefix_string = $invoice_number_prefix;
	$possible_date_arguments = _invoice_get_possible_date_arguments();
	
	$exp = explode('%', $prefix_string);
	$i = 0;
	foreach ($exp as $key => $value) {
		$i++;
		// If prefix string didn't start with %, the first characters are never a date argument		
		if (substr($prefix_string, 0, 1) == '%' || $i > 1) {
			if (strlen($value) == 1) {
				if (in_array($value, $possible_date_arguments)) {
				  $exp[$key] = date($value);	
				}
			}
			else {
				if (in_array(substr($value, 0, 1), $possible_date_arguments)) {
					$exp[$key] = date(substr($value, 0, 1));
					
					// Add the rest of the string which was not supposed to be a date argument
					$exp[$key] .= substr($value, 1);
				}
			}
		}
	}
	
	$prefix = implode('', $exp);
	
	$formatted_invoice_number = $prefix . $formatted_invoice_number;
	
	return $formatted_invoice_number;
}

/**
 * Returns all possible date arguments
 *
 * @return array
 */
function _invoice_get_possible_date_arguments() {
	$possible_date_arguments = array (
	  // Day
	  'd', 'D', 'j', 'l', 'N', 'S', 'w', 'z',
	
	  // Week
	  'W',
	
	  // Month
	  'F', 'm', 'M', 'n', 't',
	
	  // Year
	  'L', 'o', 'Y', 'y',
	
	  // Time
	  'a', 'A', 'B', 'g', 'G', 'h', 'H', 'i', 's', 'u',
	
	  // timezone
	  'e', 'I', 'O', 'P', 'T', 'Z',
	
	  // Full Date / Time
	  'c', 'r', 'U'
	);
	
	return $possible_date_arguments;
}

/**
 * Helper function to add JS or CSS to Drupal
 */
function _invoice_add_css_js() {
  $a_invoice_js_settings = array(
    'host' => $_SERVER['HTTP_HOST'],
  );
  drupal_add_js(array('invoice' => $a_invoice_js_settings), 'setting');
  drupal_add_js(_invoice_get_js(), 'inline');
  drupal_add_css(drupal_get_path('module', 'invoice') .'/invoice.css');
}

/**
 * Helper function to get a rounded value
 *
 * Read the comments on http://www.php.net/round why the
 * standard PHP round() function doesn't work right.
 * 
 * For example with PHP round(38.675, 2) gives 38.67, but that must be 38.68
 * 
 * @param mixed $value
 * @param integer $precision
 * @return float
 */
function _invoice_round($value, $precision=0) {
  $rounded_value = round(round($value*pow(10, $precision+1), 0), -1)/pow(10, $precision+1);
  return $rounded_value;
}

/**
 * Helper function to get the available template names
 */
function _invoice_get_templates() {
  $a_templates = array('default');
  $files = file_scan_directory(dirname(__FILE__) .'/templates', '.inc');
  foreach ($files as $file) {
    if (!empty($file->name) && $file->name != 'default') {
      $a_templates[] = check_plain($file->name);
    }
  }
  
  return $a_templates;
}

/**
 * Helper function to get template variables
 */
function _invoice_get_variable($template, $name, $default=NULL) {
  // if $template is empty, check if a general/default value is available
	if (empty($template)) {
  	return variable_get('invoice_'. $name, '');
  }
	
	static $a_templates = NULL;

  // Get all template settings from the database only one time
  if (!is_array($a_templates)) {
    $a_templates_names = _invoice_get_templates();
  
    $a_templates = array();
    $result = db_query("SELECT * FROM {invoice_templates} WHERE name IN ('". implode("','", $a_templates_names) ."')");
    while ($row = db_fetch_array($result)) {
      $a_templates[$row['name']] = $row;
    }
  }
    
  // Get template info that is stored in the database
  $a_template = $a_templates[$template];
  
  if (!empty($a_template[$name]) || is_numeric($a_template[$name])) {
    return $a_template[$name];
  }
  else {
    if (!is_null($default)) {
      return $default;
    }
    else {
      // if $default is not null, check if a general/default value is available 
      return variable_get('invoice_'. $name, '');
    }
  }
}

/**
 * Helper function to get an icon
 */
function _invoice_get_icon($name, $url = NULL, $attributes = array(), $extension = 'png') {
  if (empty($attributes['alt'])) {
    $attributes['alt'] = $attributes['title'];
  }
  
  $img_addition = '';
  foreach ($attributes as $key => $value) {
    $img_addition .= ' '. $key .'="'. $value .'"';
  }
  
  $icon = '<img src="'. base_path() . drupal_get_path('module', 'invoice') .'/images/'. $name .'.'. $extension .'"'. $img_addition .' />';
  if (!empty($url)) {
    $icon = l($icon, $url, array('html' => TRUE));
    //$icon = '<a href="'. base_path() . $url .'" '. drupal_attributes($attributes) .'>'. $icon .'</a>';
  }
  
  return $icon;
}

/**
 * Helper function to collect all $_GET variables and put them in a string
 */
function _invoice_getvars_array_to_string($a_vars = array()) {

  unset($a_vars['q']);
  
  $s_vars = '?';
  foreach ($a_vars as $key => $value) {
    $s_vars .= $key .'='. $value .'&';
  }
  
  return rtrim($s_vars, '&');
}

/**
 * Helper function to convert the string with get variables to an array
 *
 * @param unknown_type $s_vars
 * @return unknown
 */
function _invoice_getvars_string_to_array($s_vars) {
  $exp = explode('&', $s_vars);
  $a_query_vars = array();
  // the first element is always "q", we don't want that element so start with $i=1 
  for ($i=1;$i<count($exp);$i++) {
    $sub_exp = explode('=', $exp[$i]);
    $a_query_vars[$sub_exp[0]] = $sub_exp[1];
  }
  return $a_query_vars;
}

/**
 * Returns installed locales on the system
 *
 * @return array
 */
function _invoice_get_installed_system_locales() {
    ob_start();
    system('locale -a');
    $str = ob_get_contents();
    ob_end_clean();    
    $list = explode("\n", trim($str));
    
    return $list;
}

/**
 * Makes sure that node promote flag is off
 *
 * On ?q=admin/content/node-type/invoice there is a checkbox in the workflow fieldset that is
 * called "Promoted to front page", if this is turned on invoices will be displayed at ?q=node
 * global node overview. Because invoices are private, I guess this must always be disabled
 * for anyone.
 */
function _make_sure_node_promote_flag_is_off() {
  $node_options = variable_get('node_options_invoice', array());
  if (in_array('promote', $node_options)) {
    foreach ($node_options as $key => $option) {
      if ($option == 'promote') {
        unset($node_options[$key]);
      }
    }
  }
  variable_set('node_options_invoice', $node_options);
}

/**
 * Helper function to include the dompdf library
 */
function _invoice_dompdf_include_lib() {
  require_once(dirname(__FILE__) .'/dompdf/dompdf_config.inc.php');	
}
1	<?php
2	// $Id$
3
4	/**
5	* @file
6	* Invoice module
7	*
8	* This module was developed by Platina Designs, http://www.platinadesigns.nl
9	*
10	* @author Pieter Vogelaar <ps.vogelaar@platinadesigns.nl>
11	*/
12
13	/**
14	* Helper function to calculate invoice totals
15	*
16	* The ROUND() function of MySQL is not very reliable, especially in MySQL 4.x,
17	* that's why this function came into play
18	*
19	* @param integer $invoice_number
20	* @param integer $user_id
21	*
22	* @return array $a_totals
23	*/
24	function _invoice_get_invoice_totals($invoice_number, $user_id=0) {
25	$a_totals = array();
26	$sql_user_addition = '';
27
28	if ($user_id > 0) {
29	$sql_user_addition = ' AND uid="'. intval($user_id) .'"';
30	}
31
32	$result = db_query("SELECT vat,quantity*unitcost as extotal,
33	(quantityunitcost)((vat / 100) +1) as inctotal,
34	(quantityunitcost)((vat / 100) +1) * (1 - (1 / ((vat / 100) +1))) as vattotal
35	FROM {invoice_items}
36	WHERE invoice_id=%d" . $sql_user_addition,
37	$invoice_number
38	);
39
40	while ($row = db_fetch_object($result)) {
41	$a_totals['extotal'] += _invoice_round($row->extotal, 2);
42	$a_totals['inctotal'] += ($row->extotal * _invoice_vat_percent_to_decimal($row->vat));
43	$a_totals['vattotal'] += $row->vattotal;
44	}
45
46	$a_totals['extotal'] = _invoice_round($a_totals['extotal'], 2);
47	$a_totals['inctotal'] = _invoice_round($a_totals['inctotal'], 2);
48	$a_totals['vattotal'] = _invoice_round($a_totals['vattotal'], 2);
49
50	return $a_totals;
51	}
52
53	/**
54	* Converts a VAT value in percent to decimal
55	*
56	* For examle:
57	* A vat value of 20,5 will be converted into 1.205
58	*
59	* @param mixed $vat
60	*/
61	function _invoice_vat_percent_to_decimal($percent_vat) {
62	$decimal_vat = 1 + ($percent_vat / 100);
63	return $decimal_vat;
64	}
65
66	/**
67	* Helper function to easily get the name of the chosen template when adding an invoice
68	*/
69	function _invoice_get_chosen_template() {
70	return !isset($_SESSION['invoice_template']) \|\| empty($_SESSION['invoice_template']) ? variable_get('invoice_default_template', 'default') : $_SESSION['invoice_template'];
71	}
72
73	/**
74	* Helper function to get the invoice in HTML format
75	*/
76	function _invoice_get_html($invoice_number, $type='print') {
77	$nid = db_result(db_query("SELECT nid FROM {invoice_invoices} WHERE iid=%d", $invoice_number));
78	$node = node_load($nid);
79
80	$html = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
81	<html xmlns="http://www.w3.org/1999/xhtml" lang="nl" xml:lang="nl" dir="ltr">
82	<head>
83	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-15" />
84	';
85	$html = '<html><head>';
86	$html .= '<link type="text/css" rel="stylesheet" media="all" href="http://'. $_SERVER['HTTP_HOST'] . base_path() . drupal_get_path('module', 'invoice') .'/templates/'. $node->invoice['template'] .'.css" />';
87	$html .= '</head><body><div class="'. $type .'">';
88
89	$html .= theme('invoice_body', $node, $type);
90
91	// The eurosign is not supported as applicable character, so replace it with a ascii code
92	$html = str_replace('€', '', $html);
93
94	$html .= '</div></body></html>';
95	return $html;
96	}
97
98	/**
99	* Helper function to get invoice id
100	*
101	* @return integer
102	*/
103	function _invoice_get_new_invoice_number($user_defined_invoice_number_check=FALSE) {
104	if ($user_defined_invoice_number_check == TRUE) {
105	$count = db_result(db_query("SELECT COUNT(*) FROM {invoice_invoices}"));
106	if ($count == 0) {
107	return 0;
108	}
109	else {
110	return db_result(db_query("SELECT iid FROM {invoice_invoices} ORDER BY nid DESC LIMIT 1"));
111	}
112	}
113
114	$new_invoice_number = db_result(db_query("SELECT iid FROM {invoice_invoices} ORDER BY nid DESC LIMIT 1")) + 1;
115
116	return $new_invoice_number;
117	}
118
119	/**
120	* Helper function get a formatted invoice number
121	*
122	* @param integer $invoice_number
123	* @param mixed $formatted_invoice_number
124	*/
125	function _invoice_get_formatted_invoice_number($invoice_number, $node = NULL) {
126	$formatted_invoice_number = $invoice_number;
127
128	if (is_null($node)) {
129	$invoice_settings = db_fetch_array(db_query("SELECT leading_zeros,prefix FROM {invoice_invoices} WHERE iid=%d", $invoice_number));
130
131	$invoice_number_zerofill = $invoice_settings['leading_zeros'];
132	$invoice_number_prefix = $invoice_settings['prefix'];
133	}
134	else {
135	$invoice_number_zerofill = $node->invoice_invoice_number_zerofill;
136	$invoice_number_prefix = $node->invoice_invoice_number_prefix;
137	}
138
139	// Add leading zeros
140	$formatted_invoice_number = sprintf("%0". $invoice_number_zerofill ."d", $formatted_invoice_number);
141
142	// Add prefix
143	$prefix_string = $invoice_number_prefix;
144	$possible_date_arguments = _invoice_get_possible_date_arguments();
145
146	$exp = explode('%', $prefix_string);
147	$i = 0;
148	foreach ($exp as $key => $value) {
149	$i++;
150	// If prefix string didn't start with %, the first characters are never a date argument
151	if (substr($prefix_string, 0, 1) == '%' \|\| $i > 1) {
152	if (strlen($value) == 1) {
153	if (in_array($value, $possible_date_arguments)) {
154	$exp[$key] = date($value);
155	}
156	}
157	else {
158	if (in_array(substr($value, 0, 1), $possible_date_arguments)) {
159	$exp[$key] = date(substr($value, 0, 1));
160
161	// Add the rest of the string which was not supposed to be a date argument
162	$exp[$key] .= substr($value, 1);
163	}
164	}
165	}
166	}
167
168	$prefix = implode('', $exp);
169
170	$formatted_invoice_number = $prefix . $formatted_invoice_number;
171
172	return $formatted_invoice_number;
173	}
174
175	/**
176	* Returns all possible date arguments
177	*
178	* @return array
179	*/
180	function _invoice_get_possible_date_arguments() {
181	$possible_date_arguments = array (
182	// Day
183	'd', 'D', 'j', 'l', 'N', 'S', 'w', 'z',
184
185	// Week
186	'W',
187
188	// Month
189	'F', 'm', 'M', 'n', 't',
190
191	// Year
192	'L', 'o', 'Y', 'y',
193
194	// Time
195	'a', 'A', 'B', 'g', 'G', 'h', 'H', 'i', 's', 'u',
196
197	// timezone
198	'e', 'I', 'O', 'P', 'T', 'Z',
199
200	// Full Date / Time
201	'c', 'r', 'U'
202	);
203
204	return $possible_date_arguments;
205	}
206
207	/**
208	* Helper function to add JS or CSS to Drupal
209	*/
210	function _invoice_add_css_js() {
211	$a_invoice_js_settings = array(
212	'host' => $_SERVER['HTTP_HOST'],
213	);
214	drupal_add_js(array('invoice' => $a_invoice_js_settings), 'setting');
215	drupal_add_js(_invoice_get_js(), 'inline');
216	drupal_add_css(drupal_get_path('module', 'invoice') .'/invoice.css');
217	}
218
219	/**
220	* Helper function to get a rounded value
221	*
222	* Read the comments on http://www.php.net/round why the
223	* standard PHP round() function doesn't work right.
224	*
225	* For example with PHP round(38.675, 2) gives 38.67, but that must be 38.68
226	*
227	* @param mixed $value
228	* @param integer $precision
229	* @return float
230	*/
231	function _invoice_round($value, $precision=0) {
232	$rounded_value = round(round($value*pow(10, $precision+1), 0), -1)/pow(10, $precision+1);
233	return $rounded_value;
234	}
235
236	/**
237	* Helper function to get the available template names
238	*/
239	function _invoice_get_templates() {
240	$a_templates = array('default');
241	$files = file_scan_directory(dirname(__FILE__) .'/templates', '.inc');
242	foreach ($files as $file) {
243	if (!empty($file->name) && $file->name != 'default') {
244	$a_templates[] = check_plain($file->name);
245	}
246	}
247
248	return $a_templates;
249	}
250
251	/**
252	* Helper function to get template variables
253	*/
254	function _invoice_get_variable($template, $name, $default=NULL) {
255	// if $template is empty, check if a general/default value is available
256	if (empty($template)) {
257	return variable_get('invoice_'. $name, '');
258	}
259
260	static $a_templates = NULL;
261
262	// Get all template settings from the database only one time
263	if (!is_array($a_templates)) {
264	$a_templates_names = _invoice_get_templates();
265
266	$a_templates = array();
267	$result = db_query("SELECT * FROM {invoice_templates} WHERE name IN ('". implode("','", $a_templates_names) ."')");
268	while ($row = db_fetch_array($result)) {
269	$a_templates[$row['name']] = $row;
270	}
271	}
272
273	// Get template info that is stored in the database
274	$a_template = $a_templates[$template];
275
276	if (!empty($a_template[$name]) \|\| is_numeric($a_template[$name])) {
277	return $a_template[$name];
278	}
279	else {
280	if (!is_null($default)) {
281	return $default;
282	}
283	else {
284	// if $default is not null, check if a general/default value is available
285	return variable_get('invoice_'. $name, '');
286	}
287	}
288	}
289
290	/**
291	* Helper function to get an icon
292	*/
293	function _invoice_get_icon($name, $url = NULL, $attributes = array(), $extension = 'png') {
294	if (empty($attributes['alt'])) {
295	$attributes['alt'] = $attributes['title'];
296	}
297
298	$img_addition = '';
299	foreach ($attributes as $key => $value) {
300	$img_addition .= ' '. $key .'="'. $value .'"';
301	}
302
303	$icon = '<img src="'. base_path() . drupal_get_path('module', 'invoice') .'/images/'. $name .'.'. $extension .'"'. $img_addition .' />';
304	if (!empty($url)) {
305	$icon = l($icon, $url, array('html' => TRUE));
306	//$icon = '<a href="'. base_path() . $url .'" '. drupal_attributes($attributes) .'>'. $icon .'</a>';
307	}
308
309	return $icon;
310	}
311
312	/**
313	* Helper function to collect all $_GET variables and put them in a string
314	*/
315	function _invoice_getvars_array_to_string($a_vars = array()) {
316
317	unset($a_vars['q']);
318
319	$s_vars = '?';
320	foreach ($a_vars as $key => $value) {
321	$s_vars .= $key .'='. $value .'&';
322	}
323
324	return rtrim($s_vars, '&');
325	}
326
327	/**
328	* Helper function to convert the string with get variables to an array
329	*
330	* @param unknown_type $s_vars
331	* @return unknown
332	*/
333	function _invoice_getvars_string_to_array($s_vars) {
334	$exp = explode('&', $s_vars);
335	$a_query_vars = array();
336	// the first element is always "q", we don't want that element so start with $i=1
337	for ($i=1;$i<count($exp);$i++) {
338	$sub_exp = explode('=', $exp[$i]);
339	$a_query_vars[$sub_exp[0]] = $sub_exp[1];
340	}
341	return $a_query_vars;
342	}
343
344	/**
345	* Returns installed locales on the system
346	*
347	* @return array
348	*/
349	function _invoice_get_installed_system_locales() {
350	ob_start();
351	system('locale -a');
352	$str = ob_get_contents();
353	ob_end_clean();
354	$list = explode("\n", trim($str));
355
356	return $list;
357	}
358
359	/**
360	* Makes sure that node promote flag is off
361	*
362	* On ?q=admin/content/node-type/invoice there is a checkbox in the workflow fieldset that is
363	* called "Promoted to front page", if this is turned on invoices will be displayed at ?q=node
364	* global node overview. Because invoices are private, I guess this must always be disabled
365	* for anyone.
366	*/
367	function _make_sure_node_promote_flag_is_off() {
368	$node_options = variable_get('node_options_invoice', array());
369	if (in_array('promote', $node_options)) {
370	foreach ($node_options as $key => $option) {
371	if ($option == 'promote') {
372	unset($node_options[$key]);
373	}
374	}
375	}
376	variable_set('node_options_invoice', $node_options);
377	}
378
379	/**
380	* Helper function to include the dompdf library
381	*/
382	function _invoice_dompdf_include_lib() {
383	require_once(dirname(__FILE__) .'/dompdf/dompdf_config.inc.php');
384	}