--- loncom/interface/loncommon.pm	2004/11/19 19:31:51	1.232
+++ loncom/interface/loncommon.pm	2004/11/21 04:24:49	1.233
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.232 2004/11/19 19:31:51 albertel Exp $
+# $Id: loncommon.pm,v 1.233 2004/11/21 04:24:49 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2683,6 +2683,76 @@ sub get_users_function {
 
 ###############################################
 
+=pod
+
+=item get_sections
+
+Determines all the sections for a course including
+sections with students and sections containing other roles.
+Incoming parameters: domain, course number, reference to 
+section hash (keys to be section/group IDs), reference to 
+array containing roles for which sections should be gathered
+(optional). If the fourth argument is undefined, sections
+are gathered for any role.
+ 
+Returns number of sections.
+
+=cut
+
+###############################################
+sub get_sections {
+    my ($cdom,$cnum,$sectioncount,$possible_roles) = @_;
+    my $cid = $cdom.'_'.$cnum;
+    my $numsections = 0;
+    if ($cdom && $cnum) {
+        if (!defined($possible_roles) || (grep/^st$/,@$possible_roles)) {
+            my ($classlist) = &Apache::loncoursedata::get_classlist($cid,$cdom,$cnum);
+            my $sec_index = &Apache::loncoursedata::CL_SECTION();
+            my $status_index = &Apache::loncoursedata::CL_STATUS();
+            while (my ($student,$data) = each %$classlist) {
+                my ($section,$status) = ($data->[$sec_index],
+                                         $data->[$status_index]);
+                unless ($section eq '' || $section =~ /^\s*$/) {
+                    if (!defined($$sectioncount{$section})) {
+                        $$sectioncount{$section} = 1;
+                        $numsections ++;
+                    } else {
+                        $$sectioncount{$section} ++;
+                    }
+                }
+            }
+        }
+        my %courseroles = &Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
+        foreach my $user (sort keys %courseroles) {
+            if ($user =~ /^(\w{2})/) {
+                my $role = $1;
+                if (!defined($possible_roles) || (grep/^$role$/,@$possible_roles)) {
+                    if ($role eq 'cr') {
+                        if ($user =~ m-^$role/[^/]*/[^/]*/[^/]*:[^:]*:[^:]*:(\w+)-) {
+                            if (!defined($$sectioncount{$1})) {
+                                $$sectioncount{$1} = 1;
+                                $numsections ++;
+                            } else {
+                                $$sectioncount{$1} ++;
+                            }
+                        }
+                    }
+                    if ($user =~ /^$role:[^:]*:[^:]*:(\w+)/) {
+                        if (!defined($$sectioncount{$1})) {
+                            $$sectioncount{$1} = 1;
+                            $numsections ++;
+                        } else {
+                            $$sectioncount{$1} ++;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return $numsections;
+}
+
+
 sub get_posted_cgi {
     my $r=shift;