01: <?php
02: 
03: defined ('VARIABLE') or die;
04: 
05: /*
06: ** Create a list of required hooks according to current one's dependencies
07: ** $id      : id of current hook in global $gl_hooks array
08: ** $chain   : list of already required hooks to avoid circular references
09: ** $result  : output array containing hooks to be included
10: */
11: function    hookRequire ($id, $chain, &$result)
12: {
13:     global  $gl_hooks;
14: 
15:     // Browse hooks required by current one
16:     $hook = &$gl_hooks[$id];
17: 
18:     foreach ($hook['ref'] as $ref => $needed)
19:     {
20:         // Check for circular references
21:         if (isset ($chain[$ref]))
22:             showError (tra ('error.internal_hook_circular', array ('source' => $id, 'target' => $ref)));
23: 
24:         // Check for required hook availability and dependencies
25:         if (isset ($gl_hooks[$ref]))
26:             hookRequire ($ref, $chain + array ($ref => 0), $result);
27:         else if ($needed)
28:             showError (tra ('error.internal_hook_needed', array ('source' => $id, 'target' => $ref)));
29:     }
30: 
31:     // Check if hook has already been registered
32:     foreach ($result as $i => $item)
33:     {
34:         if ($item['id'] == $id)
35:             return;
36:     }
37: 
38:     // Insert hook regarding its weights and already included dependencies
39:     if (is_file ($hook['path']))
40:     {
41:         $min = -1;
42: 
43:         foreach ($hook['ref'] as $ref => $null)
44:             foreach ($result as $i => $item)
45:                 if ($item['id'] == $ref)
46:                     $min = max ($min, $i);
47: 
48:         for ($index = count ($result); $index > $min + 1 && $result[$index - 1]['weight'] > $hook['weight']; )
49:             --$index;
50: 
51:         array_splice ($result, $index, 0, array (array
52:         (
53:             'access'    => $hook['access'],
54:             'id'        => $id,
55:             'module'    => $hook['module'],
56:             'path'      => $hook['path'],
57:             'weight'    => $hook['weight']
58:         )));
59:     }
60:     else
61:         showError (tra ('error.internal_hook_file', array ('file' => $hook['file'], 'module' => tra ($hook['module'], array (), false))));
62: }
63: 
64: ?>