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--- wiki:tips:display_acls [2007-10-15 15:49] – made mail address clickable 131.220.9.183
+++ wiki:tips:display_acls [2007-11-20 13:29] (current) – Small bugfix 131.220.9.168
@@ Line 1: / Line 1: @@
+====== Display ACLs in page footer ======
+Sometimes, it is interesting to know, who is allowed to view the current page. Checking this in the ACL plugin is difficult and only possible for admins. By patching your favorite [[:Template|template]], you can display this information in the page footer. Remarks, suggestions etc. go to <bihler@iai.uni-bonn.de>.
+===== Instructions =====
+Somewhere in your template's ''main.php'', you'll find these lines (line 101-108 in the default template):
+<code php>
+    <div class="meta">
+      <div class="user">
+        <?php tpl_userinfo()?>
+      </div>
+      <div class="doc">
+        <?php tpl_pageinfo()?>
+      </div>
+    </div>
+</code>
+Replace these lines with the following code:
+<code php>
+   <?php
+    function tpl_aclinfo() {
+	global $ID, $AUTH_ACL;
+	if (auth_quickaclcheck($ID) == 0)
+	    return; // no rights to view, no rights to get this info
+	$page_acls = array();
+	$namespaces = array();
+	$ns = getNS($ID);
+	while ($ns) {
+	   array_unshift($namespaces,$ns . ':*');
+	   $ns = getNS($ns);
+	}
+	array_unshift($namespaces,'*'); // root
+	$namespaces[] = $ID;
+	// check matches
+	foreach ($namespaces as $level) {
+		$matches = preg_grep('/^'.preg_quote($level,'/').'\s+\S+\s+\d+\s*$/',$AUTH_ACL);
+	    $this_acls = array();
+		foreach($matches as $match){
+	      $match = preg_replace('/#.*$/','',$match); //ignore comments
+	      $acl   = preg_split('/\s+/',$match);
+	      $this_acls[urldecode($acl[1])] = $acl[2];
+	      if ($acl[1] == "@ALL")  // overwrites stuff from upper level
+	        $page_acls = array();
+	    }
+	    $page_acls =  array_merge($page_acls,$this_acls);
+	}
+	// check if visible to everyone:
+	if (($page_acls['@ALL'] !== false) && $page_acls['@ALL'] > 0)
+	  return; // page is visible to everyone
+	$list = array();
+	foreach ($page_acls as $user => $right) {
+	    if ($right > 0 && $user != "@admin" ) // admins can see everything
+	        array_push($list,$user);
+	}
+	if (count($list)) {
+	    sort($list);
+		print "(page visible to: ";
+		print join(', ',$list);
+		print ")";
+	}
+	// Uncomment this, if you want to display users/groups who cannot access this page, too:
+	/* $list = array();
+	foreach ($page_acls as $user => $right) {
+	    if ($right == 0)
+	        array_push($list,$user);
+	}
+	if (count($list)) {
+	    sort($list);
+		print "(page hidden to: ";
+		print join(', ',$list);
+		print ")";
+	}
+	*/
+}
+  ?>
+    <div class="meta">
+      <div class="user">
+        <?php tpl_userinfo()?>
+        <?php tpl_aclinfo()?>
+      </div>
+      <div class="doc">
+        <?php tpl_pageinfo()?>
+      </div>
+    </div>
+</code>