--- loncom/interface/loncommon.pm 2001/07/26 15:50:25 1.2
+++ loncom/interface/loncommon.pm 2003/12/01 14:36:22 1.157
@@ -1,52 +1,1742 @@
-# The LearningOnline Network
+# The LearningOnline Network with CAPA
# a pile of common routines
-# 2/13 Guy Albertelli
+#
+# $Id: loncommon.pm,v 1.157 2003/12/01 14:36:22 matthew Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
# Makes a table out of the previous attempts
# Inputs result_from_symbread, user, domain, course_id
+# Reads in non-network-related .tab files
+# POD header:
+
+=pod
+
+=head1 NAME
+
+Apache::loncommon - pile of common routines
+
+=head1 SYNOPSIS
+
+Common routines for manipulating connections, student answers,
+ domains, common Javascript fragments, etc.
+
+=head1 OVERVIEW
+
+A collection of commonly used subroutines that don't have a natural
+home anywhere else. This collection helps remove
+redundancy from other modules and increase efficiency of memory usage.
+
+=cut
+
+# End of POD header
package Apache::loncommon;
use strict;
-use Apache::Constants qw(:common);
+use Apache::lonnet();
+use GDBM_File;
+use POSIX qw(strftime mktime);
+use Apache::Constants qw(:common :http :methods);
use Apache::lonmsg();
+use Apache::lonmenu();
+use Apache::lonlocal;
+use HTML::Entities;
+
+my $readit;
+
+##
+## Global Variables
+##
+
+# ----------------------------------------------- Filetypes/Languages/Copyright
+my %language;
+my %supported_language;
+my %cprtag;
+my %fe; my %fd;
+my %category_extensions;
+
+# ---------------------------------------------- Designs
+
+my %designhash;
+
+# ---------------------------------------------- Thesaurus variables
+#
+# %Keywords:
+# A hash used by &keyword to determine if a word is considered a keyword.
+# $thesaurus_db_file
+# Scalar containing the full path to the thesaurus database.
+
+my %Keywords;
+my $thesaurus_db_file;
+
+#
+# Initialize values from language.tab, copyright.tab, filetypes.tab,
+# thesaurus.tab, and filecategories.tab.
+#
+BEGIN {
+ # Variable initialization
+ $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
+ #
+ unless ($readit) {
+# ------------------------------------------------------------------- languages
+ {
+ my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+ '/language.tab');
+ if ($fh) {
+ while (<$fh>) {
+ next if /^\#/;
+ chomp;
+ my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
+ $language{$key}=$val.' - '.$enc;
+ if ($sup) {
+ $supported_language{$key}=$sup;
+ }
+ }
+ }
+ }
+# ------------------------------------------------------------------ copyrights
+ {
+ my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
+ '/copyright.tab');
+ if ($fh) {
+ while (<$fh>) {
+ next if /^\#/;
+ chomp;
+ my ($key,$val)=(split(/\s+/,$_,2));
+ $cprtag{$key}=$val;
+ }
+ }
+ }
+
+# -------------------------------------------------------------- domain designs
+
+ my $filename;
+ my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
+ opendir(DIR,$designdir);
+ while ($filename=readdir(DIR)) {
+ my ($domain)=($filename=~/^(\w+)\./);
+ {
+ my $fh=Apache::File->new($designdir.'/'.$filename);
+ if ($fh) {
+ while (<$fh>) {
+ next if /^\#/;
+ chomp;
+ my ($key,$val)=(split(/\=/,$_));
+ if ($val) { $designhash{$domain.'.'.$key}=$val; }
+ }
+ }
+ }
+
+ }
+ closedir(DIR);
+
+
+# ------------------------------------------------------------- file categories
+ {
+ my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+ '/filecategories.tab');
+ if ($fh) {
+ while (<$fh>) {
+ next if /^\#/;
+ chomp;
+ my ($extension,$category)=(split(/\s+/,$_,2));
+ push @{$category_extensions{lc($category)}},$extension;
+ }
+ }
+ }
+# ------------------------------------------------------------------ file types
+ {
+ my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+ '/filetypes.tab');
+ if ($fh) {
+ while (<$fh>) {
+ next if (/^\#/);
+ chomp;
+ my ($ending,$emb,$descr)=split(/\s+/,$_,3);
+ if ($descr ne '') {
+ $fe{$ending}=lc($emb);
+ $fd{$ending}=$descr;
+ }
+ }
+ }
+ }
+ &Apache::lonnet::logthis(
+ "<font color=yellow>INFO: Read file types</font>");
+ $readit=1;
+ } # end of unless($readit)
+
+}
+
+###############################################################
+## HTML and Javascript Helper Functions ##
+###############################################################
+
+=pod
+
+=head1 HTML and Javascript Functions
+
+=over 4
+
+=item * browser_and_searcher_javascript ()
+
+X<browsing, javascript>X<searching, javascript>Returns a string
+containing javascript with two functions, C<openbrowser> and
+C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
+tags.
+
+=item * openbrowser(formname,elementname,only,omit) [javascript]
+
+inputs: formname, elementname, only, omit
+
+formname and elementname indicate the name of the html form and name of
+the element that the results of the browsing selection are to be placed in.
+
+Specifying 'only' will restrict the browser to displaying only files
+with the given extension. Can be a comma seperated list.
+
+Specifying 'omit' will restrict the browser to NOT displaying files
+with the given extension. Can be a comma seperated list.
+
+=item * opensearcher(formname, elementname) [javascript]
+
+Inputs: formname, elementname
+
+formname and elementname specify the name of the html form and the name
+of the element the selection from the search results will be placed in.
+
+=cut
+
+sub browser_and_searcher_javascript {
+ return <<END;
+ var editbrowser = null;
+ function openbrowser(formname,elementname,only,omit,titleelement) {
+ var url = '/res/?';
+ if (editbrowser == null) {
+ url += 'launch=1&';
+ }
+ url += 'catalogmode=interactive&';
+ url += 'mode=edit&';
+ url += 'form=' + formname + '&';
+ if (only != null) {
+ url += 'only=' + only + '&';
+ }
+ if (omit != null) {
+ url += 'omit=' + omit + '&';
+ }
+ if (titleelement != null) {
+ url += 'titleelement=' + titleelement + '&';
+ }
+ url += 'element=' + elementname + '';
+ var title = 'Browser';
+ var options = 'scrollbars=1,resizable=1,menubar=0';
+ options += ',width=700,height=600';
+ editbrowser = open(url,title,options,'1');
+ editbrowser.focus();
+ }
+ var editsearcher;
+ function opensearcher(formname,elementname,titleelement) {
+ var url = '/adm/searchcat?';
+ if (editsearcher == null) {
+ url += 'launch=1&';
+ }
+ url += 'catalogmode=interactive&';
+ url += 'mode=edit&';
+ url += 'form=' + formname + '&';
+ if (titleelement != null) {
+ url += 'titleelement=' + titleelement + '&';
+ }
+ url += 'element=' + elementname + '';
+ var title = 'Search';
+ var options = 'scrollbars=1,resizable=1,menubar=0';
+ options += ',width=700,height=600';
+ editsearcher = open(url,title,options,'1');
+ editsearcher.focus();
+ }
+END
+}
+
+sub studentbrowser_javascript {
+ unless (
+ (($ENV{'request.course.id'}) &&
+ (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
+ || ($ENV{'request.role'}=~/^(au|dc|su)/)
+ ) { return ''; }
+ return (<<'ENDSTDBRW');
+<script type="text/javascript" language="Javascript" >
+ var stdeditbrowser;
+ function openstdbrowser(formname,uname,udom,roleflag) {
+ var url = '/adm/pickstudent?';
+ var filter;
+ eval('filter=document.'+formname+'.'+uname+'.value;');
+ if (filter != null) {
+ if (filter != '') {
+ url += 'filter='+filter+'&';
+ }
+ }
+ url += 'form=' + formname + '&unameelement='+uname+
+ '&udomelement='+udom;
+ if (roleflag) { url+="&roles=1"; }
+ var title = 'Student_Browser';
+ var options = 'scrollbars=1,resizable=1,menubar=0';
+ options += ',width=700,height=600';
+ stdeditbrowser = open(url,title,options,'1');
+ stdeditbrowser.focus();
+ }
+</script>
+ENDSTDBRW
+}
+
+sub selectstudent_link {
+ my ($form,$unameele,$udomele)=@_;
+ if ($ENV{'request.course.id'}) {
+ unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
+ return '';
+ }
+ return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
+ '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
+ }
+ if ($ENV{'request.role'}=~/^(au|dc|su)/) {
+ return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
+ '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
+ }
+ return '';
+}
+
+sub coursebrowser_javascript {
+ my ($domainfilter)=@_;
+ return (<<ENDSTDBRW);
+<script type="text/javascript" language="Javascript" >
+ var stdeditbrowser;
+ function opencrsbrowser(formname,uname,udom) {
+ var url = '/adm/pickcourse?';
+ var filter;
+ if (filter != null) {
+ if (filter != '') {
+ url += 'filter='+filter+'&';
+ }
+ }
+ var domainfilter='$domainfilter';
+ if (domainfilter != null) {
+ if (domainfilter != '') {
+ url += 'domainfilter='+domainfilter+'&';
+ }
+ }
+ url += 'form=' + formname + '&cnumelement='+uname+
+ '&cdomelement='+udom;
+ var title = 'Course_Browser';
+ var options = 'scrollbars=1,resizable=1,menubar=0';
+ options += ',width=700,height=600';
+ stdeditbrowser = open(url,title,options,'1');
+ stdeditbrowser.focus();
+ }
+</script>
+ENDSTDBRW
+}
+
+sub selectcourse_link {
+ my ($form,$unameele,$udomele)=@_;
+ return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
+ '","'.$udomele.'");'."'>".&mt('Select Course')."</a>";
+}
+
+=pod
+
+=item * linked_select_forms(...)
+
+linked_select_forms returns a string containing a <script></script> block
+and html for two <select> menus. The select menus will be linked in that
+changing the value of the first menu will result in new values being placed
+in the second menu. The values in the select menu will appear in alphabetical
+order.
+
+linked_select_forms takes the following ordered inputs:
+
+=over 4
+
+=item * $formname, the name of the <form> tag
+
+=item * $middletext, the text which appears between the <select> tags
+
+=item * $firstdefault, the default value for the first menu
+
+=item * $firstselectname, the name of the first <select> tag
+
+=item * $secondselectname, the name of the second <select> tag
+
+=item * $hashref, a reference to a hash containing the data for the menus.
+
+=back
+
+Below is an example of such a hash. Only the 'text', 'default', and
+'select2' keys must appear as stated. keys(%menu) are the possible
+values for the first select menu. The text that coincides with the
+first menu value is given in $menu{$choice1}->{'text'}. The values
+and text for the second menu are given in the hash pointed to by
+$menu{$choice1}->{'select2'}.
+
+ my %menu = ( A1 => { text =>"Choice A1" ,
+ default => "B3",
+ select2 => {
+ B1 => "Choice B1",
+ B2 => "Choice B2",
+ B3 => "Choice B3",
+ B4 => "Choice B4"
+ }
+ },
+ A2 => { text =>"Choice A2" ,
+ default => "C2",
+ select2 => {
+ C1 => "Choice C1",
+ C2 => "Choice C2",
+ C3 => "Choice C3"
+ }
+ },
+ A3 => { text =>"Choice A3" ,
+ default => "D6",
+ select2 => {
+ D1 => "Choice D1",
+ D2 => "Choice D2",
+ D3 => "Choice D3",
+ D4 => "Choice D4",
+ D5 => "Choice D5",
+ D6 => "Choice D6",
+ D7 => "Choice D7"
+ }
+ }
+ );
+
+=cut
+
+sub linked_select_forms {
+ my ($formname,
+ $middletext,
+ $firstdefault,
+ $firstselectname,
+ $secondselectname,
+ $hashref
+ ) = @_;
+ my $second = "document.$formname.$secondselectname";
+ my $first = "document.$formname.$firstselectname";
+ # output the javascript to do the changing
+ my $result = '';
+ $result.="<script>\n";
+ $result.="var select2data = new Object();\n";
+ $" = '","';
+ my $debug = '';
+ foreach my $s1 (sort(keys(%$hashref))) {
+ $result.="select2data.d_$s1 = new Object();\n";
+ $result.="select2data.d_$s1.def = new String('".
+ $hashref->{$s1}->{'default'}."');\n";
+ $result.="select2data.d_$s1.values = new Array(";
+ my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
+ $result.="\"@s2values\");\n";
+ $result.="select2data.d_$s1.texts = new Array(";
+ my @s2texts;
+ foreach my $value (@s2values) {
+ push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
+ }
+ $result.="\"@s2texts\");\n";
+ }
+ $"=' ';
+ $result.= <<"END";
+
+function select1_changed() {
+ // Determine new choice
+ var newvalue = "d_" + $first.value;
+ // update select2
+ var values = select2data[newvalue].values;
+ var texts = select2data[newvalue].texts;
+ var select2def = select2data[newvalue].def;
+ var i;
+ // out with the old
+ for (i = 0; i < $second.options.length; i++) {
+ $second.options[i] = null;
+ }
+ // in with the nuclear
+ for (i=0;i<values.length; i++) {
+ $second.options[i] = new Option(values[i]);
+ $second.options[i].value = values[i];
+ $second.options[i].text = texts[i];
+ if (values[i] == select2def) {
+ $second.options[i].selected = true;
+ }
+ }
+}
+</script>
+END
+ # output the initial values for the selection lists
+ $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
+ foreach my $value (sort(keys(%$hashref))) {
+ $result.=" <option value=\"$value\" ";
+ $result.=" selected=\"true\" " if ($value eq $firstdefault);
+ $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
+ }
+ $result .= "</select>\n";
+ my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
+ $result .= $middletext;
+ $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
+ my $seconddefault = $hashref->{$firstdefault}->{'default'};
+ foreach my $value (sort(keys(%select2))) {
+ $result.=" <option value=\"$value\" ";
+ $result.=" selected=\"true\" " if ($value eq $seconddefault);
+ $result.=">".&mt($select2{$value})."</option>\n";
+ }
+ $result .= "</select>\n";
+ # return $debug;
+ return $result;
+} # end of sub linked_select_forms {
+
+=pod
+
+=item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
+
+Returns a string corresponding to an HTML link to the given help
+$topic, where $topic corresponds to the name of a .tex file in
+/home/httpd/html/adm/help/tex, with underscores replaced by
+spaces.
+
+$text will optionally be linked to the same topic, allowing you to
+link text in addition to the graphic. If you do not want to link
+text, but wish to specify one of the later parameters, pass an
+empty string.
+
+$stayOnPage is a value that will be interpreted as a boolean. If true,
+the link will not open a new window. If false, the link will open
+a new window using Javascript. (Default is false.)
+
+$width and $height are optional numerical parameters that will
+override the width and height of the popped up window, which may
+be useful for certain help topics with big pictures included.
+
+=cut
+
+sub help_open_topic {
+ my ($topic, $text, $stayOnPage, $width, $height) = @_;
+ $text = "" if (not defined $text);
+ $stayOnPage = 0 if (not defined $stayOnPage);
+ if ($ENV{'browser.interface'} eq 'textual' ||
+ $ENV{'environment.remote'} eq 'off' ) {
+ $stayOnPage=1;
+ }
+ $width = 350 if (not defined $width);
+ $height = 400 if (not defined $height);
+ my $filename = $topic;
+ $filename =~ s/ /_/g;
+
+ my $template = "";
+ my $link;
+
+ if (!$stayOnPage)
+ {
+ $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
+ }
+ else
+ {
+ $link = "/adm/help/${filename}.hlp";
+ }
+
+ # Add the text
+ if ($text ne "")
+ {
+ $template .=
+ "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
+ "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
+ }
+
+ # Add the graphic
+ $template .= <<"ENDTEMPLATE";
+ <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
+ENDTEMPLATE
+ if ($text ne '') { $template.='</td></tr></table>' };
+ return $template;
+
+}
+
+# This is a quicky function for Latex cheatsheet editing, since it
+# appears in at least four places
+sub helpLatexCheatsheet {
+ my $other = shift;
+ my $addOther = '';
+ if ($other) {
+ $addOther = Apache::loncommon::help_open_topic($other, shift,
+ undef, undef, 600) .
+ '</td><td>';
+ }
+ return '<table><tr><td>'.
+ $addOther .
+ &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
+ undef,undef,600)
+ .'</td><td>'.
+ &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
+ undef,undef,600)
+ .'</td></tr></table>';
+}
+
+=pod
+
+=item * csv_translate($text)
+
+Translate $text to allow it to be output as a 'comma seperated values'
+format.
+
+=cut
+
+sub csv_translate {
+ my $text = shift;
+ $text =~ s/\"/\"\"/g;
+ $text =~ s/\n//g;
+ return $text;
+}
+
+=pod
+
+=item * change_content_javascript():
+
+This and the next function allow you to create small sections of an
+otherwise static HTML page that you can update on the fly with
+Javascript, even in Netscape 4.
+
+The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
+must be written to the HTML page once. It will prove the Javascript
+function "change(name, content)". Calling the change function with the
+name of the section
+you want to update, matching the name passed to C<changable_area>, and
+the new content you want to put in there, will put the content into
+that area.
+
+B<Note>: Netscape 4 only reserves enough space for the changable area
+to contain room for the original contents. You need to "make space"
+for whatever changes you wish to make, and be B<sure> to check your
+code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
+it's adequate for updating a one-line status display, but little more.
+This script will set the space to 100% width, so you only need to
+worry about height in Netscape 4.
+
+Modern browsers are much less limiting, and if you can commit to the
+user not using Netscape 4, this feature may be used freely with
+pretty much any HTML.
+
+=cut
+
+sub change_content_javascript {
+ # If we're on Netscape 4, we need to use Layer-based code
+ if ($ENV{'browser.type'} eq 'netscape' &&
+ $ENV{'browser.version'} =~ /^4\./) {
+ return (<<NETSCAPE4);
+ function change(name, content) {
+ doc = document.layers[name+"___escape"].layers[0].document;
+ doc.open();
+ doc.write(content);
+ doc.close();
+ }
+NETSCAPE4
+ } else {
+ # Otherwise, we need to use semi-standards-compliant code
+ # (technically, "innerHTML" isn't standard but the equivalent
+ # is really scary, and every useful browser supports it
+ return (<<DOMBASED);
+ function change(name, content) {
+ element = document.getElementById(name);
+ element.innerHTML = content;
+ }
+DOMBASED
+ }
+}
+
+=pod
+
+=item * changable_area($name, $origContent):
+
+This provides a "changable area" that can be modified on the fly via
+the Javascript code provided in C<change_content_javascript>. $name is
+the name you will use to reference the area later; do not repeat the
+same name on a given HTML page more then once. $origContent is what
+the area will originally contain, which can be left blank.
+
+=cut
+
+sub changable_area {
+ my ($name, $origContent) = @_;
+
+ if ($ENV{'browser.type'} eq 'netscape' &&
+ $ENV{'browser.version'} =~ /^4\./) {
+ # If this is netscape 4, we need to use the Layer tag
+ return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
+ } else {
+ return "<span id='$name'>$origContent</span>";
+ }
+}
+
+=pod
+
+=back
+
+=cut
+
+###############################################################
+## Home server <option> list generating code ##
+###############################################################
+
+=pod
+
+=head1 Home Server option list generating code
+
+=over 4
+
+=item * get_domains()
+
+Returns an array containing each of the domains listed in the hosts.tab
+file.
+
+=cut
+
+#-------------------------------------------
+sub get_domains {
+ # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
+ my @domains;
+ my %seen;
+ foreach (sort values(%Apache::lonnet::hostdom)) {
+ push (@domains,$_) unless $seen{$_}++;
+ }
+ return @domains;
+}
+
+#-------------------------------------------
+
+=pod
+
+=item * select_form($defdom,$name,%hash)
+
+Returns a string containing a <select name='$name' size='1'> form to
+allow a user to select options from a hash option_name => displayed text.
+See lonrights.pm for an example invocation and use.
+
+=cut
+
+#-------------------------------------------
+sub select_form {
+ my ($def,$name,%hash) = @_;
+ my $selectform = "<select name=\"$name\" size=\"1\">\n";
+ my @keys;
+ if (exists($hash{'select_form_order'})) {
+ @keys=@{$hash{'select_form_order'}};
+ } else {
+ @keys=sort(keys(%hash));
+ }
+ foreach (@keys) {
+ $selectform.="<option value=\"$_\" ".
+ ($_ eq $def ? 'selected' : '').
+ ">".&mt($hash{$_})."</option>\n";
+ }
+ $selectform.="</select>";
+ return $selectform;
+}
+
+
+#-------------------------------------------
+
+=pod
+
+=item * select_dom_form($defdom,$name,$includeempty)
+
+Returns a string containing a <select name='$name' size='1'> form to
+allow a user to select the domain to preform an operation in.
+See loncreateuser.pm for an example invocation and use.
+
+If the $includeempty flag is set, it also includes an empty choice ("no domain
+selected");
+
+=cut
+
+#-------------------------------------------
+sub select_dom_form {
+ my ($defdom,$name,$includeempty) = @_;
+ my @domains = get_domains();
+ if ($includeempty) { @domains=('',@domains); }
+ my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
+ foreach (@domains) {
+ $selectdomain.="<option value=\"$_\" ".
+ ($_ eq $defdom ? 'selected' : '').
+ ">$_</option>\n";
+ }
+ $selectdomain.="</select>";
+ return $selectdomain;
+}
+
+#-------------------------------------------
+
+=pod
+
+=item * get_library_servers($domain)
+
+Returns a hash which contains keys like '103l3' and values like
+'kirk.lite.msu.edu'. All of the keys will be for machines in the
+given $domain.
+
+=cut
+
+#-------------------------------------------
+sub get_library_servers {
+ my $domain = shift;
+ my %library_servers;
+ foreach (keys(%Apache::lonnet::libserv)) {
+ if ($Apache::lonnet::hostdom{$_} eq $domain) {
+ $library_servers{$_} = $Apache::lonnet::hostname{$_};
+ }
+ }
+ return %library_servers;
+}
+
+#-------------------------------------------
+
+=pod
+
+=item * home_server_option_list($domain)
+
+returns a string which contains an <option> list to be used in a
+<select> form input. See loncreateuser.pm for an example.
+
+=cut
+
+#-------------------------------------------
+sub home_server_option_list {
+ my $domain = shift;
+ my %servers = &get_library_servers($domain);
+ my $result = '';
+ foreach (sort keys(%servers)) {
+ $result.=
+ '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
+ }
+ return $result;
+}
+
+=pod
+
+=back
+
+=cut
+
+###############################################################
+## Decoding User Agent ##
+###############################################################
+
+=pod
+
+=head1 Decoding the User Agent
+
+=over 4
+
+=item * &decode_user_agent()
+
+Inputs: $r
+
+Outputs:
+
+=over 4
+
+=item * $httpbrowser
+
+=item * $clientbrowser
+
+=item * $clientversion
+
+=item * $clientmathml
+
+=item * $clientunicode
+
+=item * $clientos
+
+=back
+
+=back
+
+=cut
+
+###############################################################
+###############################################################
+sub decode_user_agent {
+ my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
+ my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
+ my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
+ my $clientbrowser='unknown';
+ my $clientversion='0';
+ my $clientmathml='';
+ my $clientunicode='0';
+ for (my $i=0;$i<=$#browsertype;$i++) {
+ my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
+ if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
+ $clientbrowser=$bname;
+ $httpbrowser=~/$vreg/i;
+ $clientversion=$1;
+ $clientmathml=($clientversion>=$minv);
+ $clientunicode=($clientversion>=$univ);
+ }
+ }
+ my $clientos='unknown';
+ if (($httpbrowser=~/linux/i) ||
+ ($httpbrowser=~/unix/i) ||
+ ($httpbrowser=~/ux/i) ||
+ ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
+ if (($httpbrowser=~/vax/i) ||
+ ($httpbrowser=~/vms/i)) { $clientos='vms'; }
+ if ($httpbrowser=~/next/i) { $clientos='next'; }
+ if (($httpbrowser=~/mac/i) ||
+ ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
+ if ($httpbrowser=~/win/i) { $clientos='win'; }
+ if ($httpbrowser=~/embed/i) { $clientos='pda'; }
+ return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
+ $clientunicode,$clientos,);
+}
+
+###############################################################
+## Authentication changing form generation subroutines ##
+###############################################################
+##
+## All of the authform_xxxxxxx subroutines take their inputs in a
+## hash, and have reasonable default values.
+##
+## formname = the name given in the <form> tag.
+#-------------------------------------------
+
+=pod
+
+=head1 Authentication Routines
+
+=over 4
+
+=item * authform_xxxxxx
+
+The authform_xxxxxx subroutines provide javascript and html forms which
+handle some of the conveniences required for authentication forms.
+This is not an optimal method, but it works.
+
+See loncreateuser.pm for invocation and use examples.
+
+=over 4
+
+=item * authform_header
+
+=item * authform_authorwarning
+
+=item * authform_nochange
+
+=item * authform_kerberos
+
+=item * authform_internal
+
+=item * authform_filesystem
+
+=back
+
+=back
+
+=cut
+
+#-------------------------------------------
+sub authform_header{
+ my %in = (
+ formname => 'cu',
+ kerb_def_dom => '',
+ @_,
+ );
+ $in{'formname'} = 'document.' . $in{'formname'};
+ my $result='';
+
+#---------------------------------------------- Code for upper case translation
+ my $Javascript_toUpperCase;
+ unless ($in{kerb_def_dom}) {
+ $Javascript_toUpperCase =<<"END";
+ switch (choice) {
+ case 'krb': currentform.elements[choicearg].value =
+ currentform.elements[choicearg].value.toUpperCase();
+ break;
+ default:
+ }
+END
+ } else {
+ $Javascript_toUpperCase = "";
+ }
+
+ $result.=<<"END";
+var current = new Object();
+current.radiovalue = 'nochange';
+current.argfield = null;
+
+function changed_radio(choice,currentform) {
+ var choicearg = choice + 'arg';
+ // If a radio button in changed, we need to change the argfield
+ if (current.radiovalue != choice) {
+ current.radiovalue = choice;
+ if (current.argfield != null) {
+ currentform.elements[current.argfield].value = '';
+ }
+ if (choice == 'nochange') {
+ current.argfield = null;
+ } else {
+ current.argfield = choicearg;
+ switch(choice) {
+ case 'krb':
+ currentform.elements[current.argfield].value =
+ "$in{'kerb_def_dom'}";
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ return;
+}
+
+function changed_text(choice,currentform) {
+ var choicearg = choice + 'arg';
+ if (currentform.elements[choicearg].value !='') {
+ $Javascript_toUpperCase
+ // clear old field
+ if ((current.argfield != choicearg) && (current.argfield != null)) {
+ currentform.elements[current.argfield].value = '';
+ }
+ current.argfield = choicearg;
+ }
+ set_auth_radio_buttons(choice,currentform);
+ return;
+}
+
+function set_auth_radio_buttons(newvalue,currentform) {
+ var i=0;
+ while (i < currentform.login.length) {
+ if (currentform.login[i].value == newvalue) { break; }
+ i++;
+ }
+ if (i == currentform.login.length) {
+ return;
+ }
+ current.radiovalue = newvalue;
+ currentform.login[i].checked = true;
+ return;
+}
+END
+ return $result;
+}
+
+sub authform_authorwarning{
+ my $result='';
+ $result='<i>'.
+ &mt('As a general rule, only authors or co-authors should be '.
+ 'filesystem authenticated '.
+ '(which allows access to the server filesystem).')."</i>\n";
+ return $result;
+}
+
+sub authform_nochange{
+ my %in = (
+ formname => 'document.cu',
+ kerb_def_dom => 'MSU.EDU',
+ @_,
+ );
+ my $result = &mt('[_1] Do not change login data',
+ '<input type="radio" name="login" value="nochange" '.
+ 'checked="checked" onclick="'.
+ "javascript:changed_radio('nochange',$in{'formname'});".'" />');
+ return $result;
+}
+
+sub authform_kerberos{
+ my %in = (
+ formname => 'document.cu',
+ kerb_def_dom => 'MSU.EDU',
+ kerb_def_auth => 'krb4',
+ @_,
+ );
+ my ($check4,$check5);
+ if ($in{'kerb_def_auth'} eq 'krb5') {
+ $check5 = " checked=\"on\"";
+ } else {
+ $check4 = " checked=\"on\"";
+ }
+ my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
+ my $result .= &mt
+ ('[_1] Kerberos authenticated with domain [_2] '.
+ '[_3] Version 4 [_4] Version 5',
+ '<input type="radio" name="login" value="krb" '.
+ 'onclick="'.$jscall.'" onchange="'.$jscall.'" />',
+ '<input type="text" size="10" name="krbarg" '.
+ 'value="'.$in{'kerb_def_dom'}.'" '.
+ 'onchange="'.$jscall.'" />',
+ '<input type="radio" name="krbver" value="4" '.$check4.' />',
+ '<input type="radio" name="krbver" value="5" '.$check5.' />');
+ return $result;
+}
+
+sub authform_internal{
+ my %args = (
+ formname => 'document.cu',
+ kerb_def_dom => 'MSU.EDU',
+ @_,
+ );
+ my $jscall = "javascript:changed_radio('int',$args{'formname'});";
+ my $result.=&mt
+ ('[_1] Internally authenticated (with initial password [_2])',
+ '<input type="radio" name="login" value="int" '.
+ 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
+ '<input type="text" size="10" name="intarg" value="" '.
+ 'onchange="'.$jscall.'" />');
+ return $result;
+}
+
+sub authform_local{
+ my %in = (
+ formname => 'document.cu',
+ kerb_def_dom => 'MSU.EDU',
+ @_,
+ );
+ my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
+ my $result.=&mt('[_1] Local Authentication with arguement [_2]',
+ '<input type="radio" name="login" value="loc" '.
+ 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
+ '<input type="text" size="10" name="locarg" value="" '.
+ 'onchange="'.$jscall.'" />');
+ return $result;
+}
+
+sub authform_filesystem{
+ my %in = (
+ formname => 'document.cu',
+ kerb_def_dom => 'MSU.EDU',
+ @_,
+ );
+ my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
+ my $result.= &mt
+ ('[_1] Filesystem Authenticated (with initial password [_2])',
+ '<input type="radio" name="login" value="fsys" '.
+ 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
+ '<input type="text" size="10" name="fsysarg" value="" '.
+ 'onchange="'.$jscall.'" />');
+ return $result;
+}
+
+###############################################################
+## Get Authentication Defaults for Domain ##
+###############################################################
+
+=pod
+
+=head1 Domains and Authentication
+
+Returns default authentication type and an associated argument as
+listed in file 'domain.tab'.
+
+=over 4
+
+=item * get_auth_defaults
+
+get_auth_defaults($target_domain) returns the default authentication
+type and an associated argument (initial password or a kerberos domain).
+These values are stored in lonTabs/domain.tab
+
+($def_auth, $def_arg) = &get_auth_defaults($target_domain);
+
+If target_domain is not found in domain.tab, returns nothing ('').
+
+=cut
+
+#-------------------------------------------
+sub get_auth_defaults {
+ my $domain=shift;
+ return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
+}
+###############################################################
+## End Get Authentication Defaults for Domain ##
+###############################################################
+
+###############################################################
+## Get Kerberos Defaults for Domain ##
+###############################################################
+##
+## Returns default kerberos version and an associated argument
+## as listed in file domain.tab. If not listed, provides
+## appropriate default domain and kerberos version.
+##
+#-------------------------------------------
+
+=pod
+
+=item * get_kerberos_defaults
+
+get_kerberos_defaults($target_domain) returns the default kerberos
+version and domain. If not found in domain.tabs, it defaults to
+version 4 and the domain of the server.
+
+($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
+
+=cut
+
+#-------------------------------------------
+sub get_kerberos_defaults {
+ my $domain=shift;
+ my ($krbdef,$krbdefdom) =
+ &Apache::loncommon::get_auth_defaults($domain);
+ unless ($krbdef =~/^krb/ && $krbdefdom) {
+ $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
+ my $krbdefdom=$1;
+ $krbdefdom=~tr/a-z/A-Z/;
+ $krbdef = "krb4";
+ }
+ return ($krbdef,$krbdefdom);
+}
+
+=pod
+
+=back
+
+=cut
+
+###############################################################
+## Thesaurus Functions ##
+###############################################################
+
+=pod
+
+=head1 Thesaurus Functions
+
+=over 4
+
+=item * initialize_keywords
+
+Initializes the package variable %Keywords if it is empty. Uses the
+package variable $thesaurus_db_file.
+
+=cut
+
+###################################################
+
+sub initialize_keywords {
+ return 1 if (scalar keys(%Keywords));
+ # If we are here, %Keywords is empty, so fill it up
+ # Make sure the file we need exists...
+ if (! -e $thesaurus_db_file) {
+ &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
+ " failed because it does not exist");
+ return 0;
+ }
+ # Set up the hash as a database
+ my %thesaurus_db;
+ if (! tie(%thesaurus_db,'GDBM_File',
+ $thesaurus_db_file,&GDBM_READER(),0640)){
+ &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
+ $thesaurus_db_file);
+ return 0;
+ }
+ # Get the average number of appearances of a word.
+ my $avecount = $thesaurus_db{'average.count'};
+ # Put keywords (those that appear > average) into %Keywords
+ while (my ($word,$data)=each (%thesaurus_db)) {
+ my ($count,undef) = split /:/,$data;
+ $Keywords{$word}++ if ($count > $avecount);
+ }
+ untie %thesaurus_db;
+ # Remove special values from %Keywords.
+ foreach ('total.count','average.count') {
+ delete($Keywords{$_}) if (exists($Keywords{$_}));
+ }
+ return 1;
+}
+
+###################################################
+
+=pod
+
+=item * keyword($word)
+
+Returns true if $word is a keyword. A keyword is a word that appears more
+than the average number of times in the thesaurus database. Calls
+&initialize_keywords
+
+=cut
+
+###################################################
+
+sub keyword {
+ return if (!&initialize_keywords());
+ my $word=lc(shift());
+ $word=~s/\W//g;
+ return exists($Keywords{$word});
+}
+
+###############################################################
+
+=pod
+
+=item * get_related_words
+
+Look up a word in the thesaurus. Takes a scalar arguement and returns
+an array of words. If the keyword is not in the thesaurus, an empty array
+will be returned. The order of the words returned is determined by the
+database which holds them.
+
+Uses global $thesaurus_db_file.
+
+=cut
+
+###############################################################
+sub get_related_words {
+ my $keyword = shift;
+ my %thesaurus_db;
+ if (! -e $thesaurus_db_file) {
+ &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
+ "failed because the file does not exist");
+ return ();
+ }
+ if (! tie(%thesaurus_db,'GDBM_File',
+ $thesaurus_db_file,&GDBM_READER(),0640)){
+ return ();
+ }
+ my @Words=();
+ if (exists($thesaurus_db{$keyword})) {
+ $_ = $thesaurus_db{$keyword};
+ (undef,@Words) = split/:/; # The first element is the number of times
+ # the word appears. We do not need it now.
+ for (my $i=0;$i<=$#Words;$i++) {
+ ($Words[$i],undef)= split/\,/,$Words[$i];
+ }
+ }
+ untie %thesaurus_db;
+ return @Words;
+}
+
+=pod
+
+=back
+
+=cut
+
+# -------------------------------------------------------------- Plaintext name
+=pod
+
+=head1 User Name Functions
+
+=over 4
+
+=item * plainname($uname,$udom)
+
+Takes a users logon name and returns it as a string in
+"first middle last generation" form
+
+=cut
+
+###############################################################
+sub plainname {
+ my ($uname,$udom)=@_;
+ my %names=&Apache::lonnet::get('environment',
+ ['firstname','middlename','lastname','generation'],
+ $udom,$uname);
+ my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
+ $names{'lastname'}.' '.$names{'generation'};
+ $name=~s/\s+$//;
+ $name=~s/\s+/ /g;
+ return $name;
+}
+
+# -------------------------------------------------------------------- Nickname
+=pod
+
+=item * nickname($uname,$udom)
+
+Gets a users name and returns it as a string as
+
+""nickname""
+
+if the user has a nickname or
+
+"first middle last generation"
+
+if the user does not
+
+=cut
+
+sub nickname {
+ my ($uname,$udom)=@_;
+ my %names=&Apache::lonnet::get('environment',
+ ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
+ my $name=$names{'nickname'};
+ if ($name) {
+ $name='"'.$name.'"';
+ } else {
+ $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
+ $names{'lastname'}.' '.$names{'generation'};
+ $name=~s/\s+$//;
+ $name=~s/\s+/ /g;
+ }
+ return $name;
+}
+
+
+# ------------------------------------------------------------------ Screenname
+
+=pod
+
+=item * screenname($uname,$udom)
+
+Gets a users screenname and returns it as a string
+
+=cut
+
+sub screenname {
+ my ($uname,$udom)=@_;
+ my %names=
+ &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
+ return $names{'screenname'};
+}
+
+# ------------------------------------------------------------- Message Wrapper
+
+sub messagewrapper {
+ my ($link,$un,$do)=@_;
+ return
+"<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
+}
+# --------------------------------------------------------------- Notes Wrapper
+
+sub noteswrapper {
+ my ($link,$un,$do)=@_;
+ return
+"<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
+}
+# ------------------------------------------------------------- Aboutme Wrapper
+
+sub aboutmewrapper {
+ my ($link,$username,$domain)=@_;
+ return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
+}
+
+# ------------------------------------------------------------ Syllabus Wrapper
+
+
+sub syllabuswrapper {
+ my ($linktext,$coursedir,$domain,$fontcolor)=@_;
+ if ($fontcolor) {
+ $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
+ }
+ return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
+}
+
+=pod
+
+=back
+
+=head1 Access .tab File Data
+
+=over 4
+
+=item * languageids()
+
+returns list of all language ids
+
+=cut
+
+sub languageids {
+ return sort(keys(%language));
+}
+
+=pod
+
+=item * languagedescription()
+
+returns description of a specified language id
+
+=cut
+
+sub languagedescription {
+ my $code=shift;
+ return ($supported_language{$code}?'* ':'').
+ $language{$code}.
+ ($supported_language{$code}?' ('.&mt('interface available').')':'');
+}
+
+sub plainlanguagedescription {
+ my $code=shift;
+ return $language{$code};
+}
+
+sub supportedlanguagecode {
+ my $code=shift;
+ return $supported_language{$code};
+}
+
+=pod
+
+=item * copyrightids()
+
+returns list of all copyrights
+
+=cut
+
+sub copyrightids {
+ return sort(keys(%cprtag));
+}
+
+=pod
+
+=item * copyrightdescription()
+
+returns description of a specified copyright id
+
+=cut
+
+sub copyrightdescription {
+ return $cprtag{shift(@_)};
+}
+
+=pod
+
+=item * filecategories()
+
+returns list of all file categories
+
+=cut
+
+sub filecategories {
+ return sort(keys(%category_extensions));
+}
+
+=pod
+
+=item * filecategorytypes()
+
+returns list of file types belonging to a given file
+category
+
+=cut
+
+sub filecategorytypes {
+ return @{$category_extensions{lc($_[0])}};
+}
+
+=pod
+
+=item * fileembstyle()
+
+returns embedding style for a specified file type
+
+=cut
+
+sub fileembstyle {
+ return $fe{lc(shift(@_))};
+}
+
+=pod
+
+=item * filedescription()
+
+returns description for a specified file type
+
+=cut
+
+sub filedescription {
+ return $fd{lc(shift(@_))};
+}
+
+=pod
+
+=item * filedescriptionex()
+
+returns description for a specified file type with
+extra formatting
+
+=cut
+
+sub filedescriptionex {
+ my $ex=shift;
+ return '.'.$ex.' '.$fd{lc($ex)};
+}
+
+# End of .tab access
+=pod
+
+=back
+
+=cut
+
+# ------------------------------------------------------------------ File Types
+sub fileextensions {
+ return sort(keys(%fe));
+}
+
+# ----------------------------------------------------------- Display Languages
+# returns a hash with all desired display languages
+#
+
+sub display_languages {
+ my %languages=();
+ foreach (&preferred_languages()) {
+ $languages{$_}=1;
+ }
+ &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
+ if ($ENV{'form.displaylanguage'}) {
+ foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
+ $languages{$_}=1;
+ }
+ }
+ return %languages;
+}
+
+sub preferred_languages {
+ my @languages=();
+ if ($ENV{'environment.languages'}) {
+ @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
+ }
+ if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
+ @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
+ $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
+ }
+ my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
+ if ($browser) {
+ @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
+ }
+ if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
+ @languages=(@languages,
+ $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
+ }
+ if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
+ @languages=(@languages,
+ $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
+ }
+ if ($Apache::lonnet::domain_lang_def{
+ $Apache::lonnet::perlvar{'lonDefDomain'}}) {
+ @languages=(@languages,
+ $Apache::lonnet::domain_lang_def{
+ $Apache::lonnet::perlvar{'lonDefDomain'}});
+ }
+# turn "en-ca" into "en-ca,en"
+ my @genlanguages;
+ foreach (@languages) {
+ unless ($_=~/\w/) { next; }
+ push (@genlanguages,$_);
+ if ($_=~/(\-|\_)/) {
+ push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
+ }
+ }
+ return @genlanguages;
+}
+
+###############################################################
+## Student Answer Attempts ##
+###############################################################
+
+=pod
+
+=head1 Alternate Problem Views
+
+=over 4
+
+=item * get_previous_attempt($symb, $username, $domain, $course,
+ $getattempt, $regexp, $gradesub)
+
+Return string with previous attempt on problem. Arguments:
+
+=over 4
+
+=item * $symb: Problem, including path
+
+=item * $username: username of the desired student
+
+=item * $domain: domain of the desired student
+
+=item * $course: Course ID
+
+=item * $getattempt: Leave blank for all attempts, otherwise put
+ something
+
+=item * $regexp: if string matches this regexp, the string will be
+ sent to $gradesub
+
+=item * $gradesub: routine that processes the string if it matches $regexp
+
+=back
+
+The output string is a table containing all desired attempts, if any.
+
+=cut
sub get_previous_attempt {
- my ($symb,$username,$domain,$course)=@_;
+ my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
my $prevattempts='';
+ no strict 'refs';
if ($symb) {
- my $answer=&Apache::lonnet::reply(
- "restore:".$domain.':'.$username.':'.$course.':'.
- &Apache::lonnet::escape($symb));
- my %returnhash=();
- map {
- my ($name,$value)=split(/\=/,$_);
- $returnhash{&Apache::lonnet::unescape($name)}=
- &Apache::lonnet::unescape($value);
- } split(/\&/,$answer);
+ my (%returnhash)=
+ &Apache::lonnet::restore($symb,$course,$domain,$username);
if ($returnhash{'version'}) {
my %lasthash=();
my $version;
for ($version=1;$version<=$returnhash{'version'};$version++) {
- map {
+ foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
$lasthash{$_}=$returnhash{$version.':'.$_};
- } split(/\:/,$returnhash{$version.':keys'});
+ }
}
- $prevattempts='<table border=2></tr><th>History</th>';
- map {
- $prevattempts.='<th>'.$_.'</th>';
- } keys %lasthash;
- for ($version=1;$version<=$returnhash{'version'};$version++) {
- $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
- map {
- $prevattempts.='<td>'.$returnhash{$version.':'.$_}.'</td>';
- } keys %lasthash;
+ $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
+ $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
+ foreach (sort(keys %lasthash)) {
+ my ($ign,@parts) = split(/\./,$_);
+ if ($#parts > 0) {
+ my $data=$parts[-1];
+ pop(@parts);
+ $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
+ } else {
+ if ($#parts == 0) {
+ $prevattempts.='<th>'.$parts[0].'</th>';
+ } else {
+ $prevattempts.='<th>'.$ign.'</th>';
+ }
+ }
}
- $prevattempts.='</tr><tr><th>Current</th>';
- map {
- $prevattempts.='<td>'.$lasthash{$_}.'</td>';
- } keys %lasthash;
- $prevattempts.='</tr></table>';
+ if ($getattempt eq '') {
+ for ($version=1;$version<=$returnhash{'version'};$version++) {
+ $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
+ foreach (sort(keys %lasthash)) {
+ my $value;
+ if ($_ =~ /timestamp/) {
+ $value=scalar(localtime($returnhash{$version.':'.$_}));
+ } else {
+ $value=$returnhash{$version.':'.$_};
+ }
+ $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
+ }
+ }
+ }
+ $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
+ foreach (sort(keys %lasthash)) {
+ my $value;
+ if ($_ =~ /timestamp/) {
+ $value=scalar(localtime($lasthash{$_}));
+ } else {
+ $value=$lasthash{$_};
+ }
+ $value=&Apache::lonnet::unescape($value);
+ if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
+ $prevattempts.='<td>'.$value.' </td>';
+ }
+ $prevattempts.='</tr></table></td></tr></table>';
} else {
$prevattempts='Nothing submitted - no attempts.';
}
@@ -55,5 +1745,1476 @@ sub get_previous_attempt {
}
}
+sub relative_to_absolute {
+ my ($url,$output)=@_;
+ my $parser=HTML::TokeParser->new(\$output);
+ my $token;
+ my $thisdir=$url;
+ my @rlinks=();
+ while ($token=$parser->get_token) {
+ if ($token->[0] eq 'S') {
+ if ($token->[1] eq 'a') {
+ if ($token->[2]->{'href'}) {
+ $rlinks[$#rlinks+1]=$token->[2]->{'href'};
+ }
+ } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
+ $rlinks[$#rlinks+1]=$token->[2]->{'src'};
+ } elsif ($token->[1] eq 'base') {
+ $thisdir=$token->[2]->{'href'};
+ }
+ }
+ }
+ $thisdir=~s-/[^/]*$--;
+ foreach (@rlinks) {
+ unless (($_=~/^http:\/\//i) ||
+ ($_=~/^\//) ||
+ ($_=~/^javascript:/i) ||
+ ($_=~/^mailto:/i) ||
+ ($_=~/^\#/)) {
+ my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
+ $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
+ }
+ }
+# -------------------------------------------------- Deal with Applet codebases
+ $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
+ return $output;
+}
+
+=pod
+
+=item * get_student_view
+
+show a snapshot of what student was looking at
+
+=cut
+
+sub get_student_view {
+ my ($symb,$username,$domain,$courseid,$target) = @_;
+ my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
+ my (%old,%moreenv);
+ my @elements=('symb','courseid','domain','username');
+ foreach my $element (@elements) {
+ $old{$element}=$ENV{'form.grade_'.$element};
+ $moreenv{'form.grade_'.$element}=eval '$'.$element #'
+ }
+ if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
+ &Apache::lonnet::appenv(%moreenv);
+ $feedurl=&Apache::lonnet::clutter($feedurl);
+ my $userview=&Apache::lonnet::ssi_body($feedurl);
+ &Apache::lonnet::delenv('form.grade_');
+ foreach my $element (@elements) {
+ $ENV{'form.grade_'.$element}=$old{$element};
+ }
+ $userview=~s/\<body[^\>]*\>//gi;
+ $userview=~s/\<\/body\>//gi;
+ $userview=~s/\<html\>//gi;
+ $userview=~s/\<\/html\>//gi;
+ $userview=~s/\<head\>//gi;
+ $userview=~s/\<\/head\>//gi;
+ $userview=~s/action\s*\=/would_be_action\=/gi;
+ $userview=&relative_to_absolute($feedurl,$userview);
+ return $userview;
+}
+
+=pod
+
+=item * get_student_answers()
+
+show a snapshot of how student was answering problem
+
+=cut
+
+sub get_student_answers {
+ my ($symb,$username,$domain,$courseid,%form) = @_;
+ my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
+ my (%old,%moreenv);
+ my @elements=('symb','courseid','domain','username');
+ foreach my $element (@elements) {
+ $old{$element}=$ENV{'form.grade_'.$element};
+ $moreenv{'form.grade_'.$element}=eval '$'.$element #'
+ }
+ $moreenv{'form.grade_target'}='answer';
+ &Apache::lonnet::appenv(%moreenv);
+ my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
+ &Apache::lonnet::delenv('form.grade_');
+ foreach my $element (@elements) {
+ $ENV{'form.grade_'.$element}=$old{$element};
+ }
+ return $userview;
+}
+
+=pod
+
+=item * &submlink()
+
+Inputs: $text $uname $udom $symb
+
+Returns: A link to grades.pm such as to see the SUBM view of a student
+
+=cut
+
+###############################################
+sub submlink {
+ my ($text,$uname,$udom,$symb)=@_;
+ if (!($uname && $udom)) {
+ (my $cursymb, my $courseid,$udom,$uname)=
+ &Apache::lonxml::whichuser($symb);
+ if (!$symb) { $symb=$cursymb; }
+ }
+ if (!$symb) { $symb=&symbread(); }
+ return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
+ '&userdom='.$udom.'&command=submission">'.$text.'</a>';
+}
+##############################################
+
+=pod
+
+=back
+
+=cut
+
+###############################################
+
+
+sub timehash {
+ my @ltime=localtime(shift);
+ return ( 'seconds' => $ltime[0],
+ 'minutes' => $ltime[1],
+ 'hours' => $ltime[2],
+ 'day' => $ltime[3],
+ 'month' => $ltime[4]+1,
+ 'year' => $ltime[5]+1900,
+ 'weekday' => $ltime[6],
+ 'dayyear' => $ltime[7]+1,
+ 'dlsav' => $ltime[8] );
+}
+
+sub maketime {
+ my %th=@_;
+ return POSIX::mktime(
+ ($th{'seconds'},$th{'minutes'},$th{'hours'},
+ $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
+}
+
+
+#########################################
+#
+# Retro-fixing of un-backward-compatible time format
+
+sub unsqltime {
+ my $timestamp=shift;
+ if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
+ $timestamp=&maketime(
+ 'year'=>$1,'month'=>$2,'day'=>$3,
+ 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
+ }
+ return $timestamp;
+}
+
+#########################################
+
+sub findallcourses {
+ my %courses=();
+ my $now=time;
+ foreach (keys %ENV) {
+ if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
+ my ($starttime,$endtime)=$ENV{$_};
+ my $active=1;
+ if ($starttime) {
+ if ($now<$starttime) { $active=0; }
+ }
+ if ($endtime) {
+ if ($now>$endtime) { $active=0; }
+ }
+ if ($active) { $courses{$1.'_'.$2}=1; }
+ }
+ }
+ return keys %courses;
+}
+
+###############################################
+###############################################
+
+=pod
+
+=head1 Domain Template Functions
+
+=over 4
+
+=item * &determinedomain()
+
+Inputs: $domain (usually will be undef)
+
+Returns: Determines which domain should be used for designs
+
+=cut
+
+###############################################
+sub determinedomain {
+ my $domain=shift;
+ if (! $domain) {
+ # Determine domain if we have not been given one
+ $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
+ if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
+ if ($ENV{'request.role.domain'}) {
+ $domain=$ENV{'request.role.domain'};
+ }
+ }
+ return $domain;
+}
+###############################################
+=pod
+
+=item * &domainlogo()
+
+Inputs: $domain (usually will be undef)
+
+Returns: A link to a domain logo, if the domain logo exists.
+If the domain logo does not exist, a description of the domain.
+
+=cut
+
+###############################################
+sub domainlogo {
+ my $domain = &determinedomain(shift);
+ # See if there is a logo
+ if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
+ my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
+ if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
+ return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
+ '/adm/lonDomLogos/'.$domain.'.gif" alt="'.$domain.'" />';
+ } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
+ return $Apache::lonnet::domaindescription{$domain};
+ } else {
+ return '';
+ }
+}
+##############################################
+
+=pod
+
+=item * &designparm()
+
+Inputs: $which parameter; $domain (usually will be undef)
+
+Returns: value of designparamter $which
+
+=cut
+
+##############################################
+sub designparm {
+ my ($which,$domain)=@_;
+ if ($ENV{'browser.blackwhite'} eq 'on') {
+ if ($which=~/\.(font|alink|vlink|link)$/) {
+ return '#000000';
+ }
+ if ($which=~/\.(pgbg|sidebg)$/) {
+ return '#FFFFFF';
+ }
+ if ($which=~/\.tabbg$/) {
+ return '#CCCCCC';
+ }
+ }
+ if ($ENV{'environment.color.'.$which}) {
+ return $ENV{'environment.color.'.$which};
+ }
+ $domain=&determinedomain($domain);
+ if ($designhash{$domain.'.'.$which}) {
+ return $designhash{$domain.'.'.$which};
+ } else {
+ return $designhash{'default.'.$which};
+ }
+}
+
+###############################################
+###############################################
+
+=pod
+
+=back
+
+=head1 HTTP Helpers
+
+=over 4
+
+=item * &bodytag()
+
+Returns a uniform header for LON-CAPA web pages.
+
+Inputs:
+
+=over 4
+
+=item * $title, A title to be displayed on the page.
+
+=item * $function, the current role (can be undef).
+
+=item * $addentries, extra parameters for the <body> tag.
+
+=item * $bodyonly, if defined, only return the <body> tag.
+
+=item * $domain, if defined, force a given domain.
+
+=item * $forcereg, if page should register as content page (relevant for
+ text interface only)
+
+=back
+
+Returns: A uniform header for LON-CAPA web pages.
+If $bodyonly is nonzero, a string containing a <body> tag will be returned.
+If $bodyonly is undef or zero, an html string containing a <body> tag and
+other decorations will be returned.
+
+=cut
+
+sub bodytag {
+ my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
+ $title=&mt($title);
+ unless ($function) {
+ $function='student';
+ if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
+ $function='coordinator';
+ }
+ if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
+ $function='admin';
+ }
+ if (($ENV{'request.role'}=~/^(au|ca)/) ||
+ ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
+ $function='author';
+ }
+ }
+ my $img=&designparm($function.'.img',$domain);
+ my $pgbg=&designparm($function.'.pgbg',$domain);
+ my $tabbg=&designparm($function.'.tabbg',$domain);
+ my $font=&designparm($function.'.font',$domain);
+ my $link=&designparm($function.'.link',$domain);
+ my $alink=&designparm($function.'.alink',$domain);
+ my $vlink=&designparm($function.'.vlink',$domain);
+ my $sidebg=&designparm($function.'.sidebg',$domain);
+# Accessibility font enhance
+ unless ($addentries) { $addentries=''; }
+ my $addstyle='';
+ if ($ENV{'browser.fontenhance'} eq 'on') {
+ $addstyle=' font-size: x-large;';
+ }
+ # role and realm
+ my ($role,$realm)
+ =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
+# realm
+ if ($ENV{'request.course.id'}) {
+ $realm=
+ $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
+ }
+ unless ($realm) { $realm=' '; }
+# Set messages
+ my $messages=&domainlogo($domain);
+# Port for miniserver
+ my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
+ if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
+# construct main body tag
+ my $bodytag = <<END;
+<style>
+h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
+a:focus { color: red; background: yellow }
+</style>
+<body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
+style="margin-top: 0px;$addstyle" $addentries>
+END
+ my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
+ $lonhttpdPort.$img.'" alt="'.$function.'" />';
+ if ($bodyonly) {
+ return $bodytag;
+ } elsif ($ENV{'browser.interface'} eq 'textual') {
+# Accessibility
+ return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
+ $forcereg).
+ '<h1>LON-CAPA: '.$title.'</h1>';
+ } elsif ($ENV{'environment.remote'} eq 'off') {
+# No Remote
+ return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
+ $forcereg).
+ '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font face="Arial, Helvetica, sans-serif" size="+3" color="'.$font.'"><b>'.$title.
+'</b></font></td></tr></table>';
+ }
+
+#
+# Top frame rendering, Remote is up
+#
+ return(<<ENDBODY);
+$bodytag
+<table width="100%" cellspacing="0" border="0" cellpadding="0">
+<tr><td bgcolor="$sidebg">
+$upperleft</td>
+<td bgcolor="$sidebg" align="right">$messages </td>
+</tr>
+<tr>
+<td rowspan="3" bgcolor="$tabbg">
+ <font size="5" face="Arial, Helvetica, sans-serif"><b>$title</b></font>
+<td bgcolor="$tabbg" align="right">
+<font size="2" face="Arial, Helvetica, sans-serif">
+ $ENV{'environment.firstname'}
+ $ENV{'environment.middlename'}
+ $ENV{'environment.lastname'}
+ $ENV{'environment.generation'}
+ </font>
+</td>
+</tr>
+<tr><td bgcolor="$tabbg" align="right">
+<font size="2" face="Arial, Helvetica, sans-serif">$role</font>
+</td></tr>
+<tr>
+<td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font> </td></tr>
+</table><br>
+ENDBODY
+}
+
+###############################################
+
+sub get_posted_cgi {
+ my $r=shift;
+
+ my $buffer;
+
+ $r->read($buffer,$r->header_in('Content-length'),0);
+ unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
+ my @pairs=split(/&/,$buffer);
+ my $pair;
+ foreach $pair (@pairs) {
+ my ($name,$value) = split(/=/,$pair);
+ $value =~ tr/+/ /;
+ $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+ $name =~ tr/+/ /;
+ $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+ &add_to_env("form.$name",$value);
+ }
+ } else {
+ my $contentsep=$1;
+ my @lines = split (/\n/,$buffer);
+ my $name='';
+ my $value='';
+ my $fname='';
+ my $fmime='';
+ my $i;
+ for ($i=0;$i<=$#lines;$i++) {
+ if ($lines[$i]=~/^$contentsep/) {
+ if ($name) {
+ chomp($value);
+ if ($fname) {
+ $ENV{"form.$name.filename"}=$fname;
+ $ENV{"form.$name.mimetype"}=$fmime;
+ } else {
+ $value=~s/\s+$//s;
+ }
+ &add_to_env("form.$name",$value);
+ }
+ if ($i<$#lines) {
+ $i++;
+ $lines[$i]=~
+ /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
+ $name=$1;
+ $value='';
+ if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
+ $fname=$1;
+ if
+ ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
+ $fmime=$1;
+ $i++;
+ } else {
+ $fmime='';
+ }
+ } else {
+ $fname='';
+ $fmime='';
+ }
+ $i++;
+ }
+ } else {
+ $value.=$lines[$i]."\n";
+ }
+ }
+ }
+ $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
+ $r->method_number(M_GET);
+ $r->method('GET');
+ $r->headers_in->unset('Content-length');
+}
+
+=pod
+
+=item * get_unprocessed_cgi($query,$possible_names)
+
+Modify the %ENV hash to contain unprocessed CGI form parameters held in
+$query. The parameters listed in $possible_names (an array reference),
+will be set in $ENV{'form.name'} if they do not already exist.
+
+Typically called with $ENV{'QUERY_STRING'} as the first parameter.
+$possible_names is an ref to an array of form element names. As an example:
+get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
+will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
+
+=cut
+
+sub get_unprocessed_cgi {
+ my ($query,$possible_names)= @_;
+ # $Apache::lonxml::debug=1;
+ foreach (split(/&/,$query)) {
+ my ($name, $value) = split(/=/,$_);
+ $name = &Apache::lonnet::unescape($name);
+ if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
+ $value =~ tr/+/ /;
+ $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+ &Apache::lonxml::debug("Seting :$name: to :$value:");
+ unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
+ }
+ }
+}
+
+=pod
+
+=item * cacheheader()
+
+returns cache-controlling header code
+
+=cut
+
+sub cacheheader {
+ unless ($ENV{'request.method'} eq 'GET') { return ''; }
+ my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
+ my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
+ <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
+ <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
+ return $output;
+}
+
+=pod
+
+=item * no_cache($r)
+
+specifies header code to not have cache
+
+=cut
+
+sub no_cache {
+ my ($r) = @_;
+ unless ($ENV{'request.method'} eq 'GET') { return ''; }
+ #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
+ $r->no_cache(1);
+ $r->header_out("Pragma" => "no-cache");
+ #$r->header_out("Expires" => $date);
+}
+
+sub content_type {
+ my ($r,$type,$charset) = @_;
+ unless ($charset) {
+ $charset=&Apache::lonlocal::current_encoding;
+ }
+ $r->content_type($type.($charset?'; charset='.$charset:''));
+}
+
+=pod
+
+=item * add_to_env($name,$value)
+
+adds $name to the %ENV hash with value
+$value, if $name already exists, the entry is converted to an array
+reference and $value is added to the array.
+
+=cut
+
+sub add_to_env {
+ my ($name,$value)=@_;
+ if (defined($ENV{$name})) {
+ if (ref($ENV{$name})) {
+ #already have multiple values
+ push(@{ $ENV{$name} },$value);
+ } else {
+ #first time seeing multiple values, convert hash entry to an arrayref
+ my $first=$ENV{$name};
+ undef($ENV{$name});
+ push(@{ $ENV{$name} },$first,$value);
+ }
+ } else {
+ $ENV{$name}=$value;
+ }
+}
+
+=pod
+
+=item * get_env_multiple($name)
+
+gets $name from the %ENV hash, it seemlessly handles the cases where multiple
+values may be defined and end up as an array ref.
+
+returns an array of values
+
+=cut
+
+sub get_env_multiple {
+ my ($name) = @_;
+ my @values;
+ if (defined($ENV{$name})) {
+ # exists is it an array
+ if (ref($ENV{$name})) {
+ @values=@{ $ENV{$name} };
+ } else {
+ $values[0]=$ENV{$name};
+ }
+ }
+ return(@values);
+}
+
+
+=pod
+
+=back
+
+=head1 CSV Upload/Handling functions
+
+=over 4
+
+=item * upfile_store($r)
+
+Store uploaded file, $r should be the HTTP Request object,
+needs $ENV{'form.upfile'}
+returns $datatoken to be put into hidden field
+
+=cut
+
+sub upfile_store {
+ my $r=shift;
+ $ENV{'form.upfile'}=~s/\r/\n/gs;
+ $ENV{'form.upfile'}=~s/\f/\n/gs;
+ $ENV{'form.upfile'}=~s/\n+/\n/gs;
+ $ENV{'form.upfile'}=~s/\n+$//gs;
+
+ my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
+ '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
+ {
+ my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
+ '/tmp/'.$datatoken.'.tmp');
+ print $fh $ENV{'form.upfile'};
+ }
+ return $datatoken;
+}
+
+=pod
+
+=item * load_tmp_file($r)
+
+Load uploaded file from tmp, $r should be the HTTP Request object,
+needs $ENV{'form.datatoken'},
+sets $ENV{'form.upfile'} to the contents of the file
+
+=cut
+
+sub load_tmp_file {
+ my $r=shift;
+ my @studentdata=();
+ {
+ my $fh;
+ if ($fh=Apache::File->new($r->dir_config('lonDaemons').
+ '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
+ @studentdata=<$fh>;
+ }
+ }
+ $ENV{'form.upfile'}=join('',@studentdata);
+}
+
+=pod
+
+=item * upfile_record_sep()
+
+Separate uploaded file into records
+returns array of records,
+needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
+
+=cut
+
+sub upfile_record_sep {
+ if ($ENV{'form.upfiletype'} eq 'xml') {
+ } else {
+ return split(/\n/,$ENV{'form.upfile'});
+ }
+}
+
+=pod
+
+=item * record_sep($record)
+
+Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
+
+=cut
+
+sub record_sep {
+ my $record=shift;
+ my %components=();
+ if ($ENV{'form.upfiletype'} eq 'xml') {
+ } elsif ($ENV{'form.upfiletype'} eq 'space') {
+ my $i=0;
+ foreach (split(/\s+/,$record)) {
+ my $field=$_;
+ $field=~s/^(\"|\')//;
+ $field=~s/(\"|\')$//;
+ $components{$i}=$field;
+ $i++;
+ }
+ } elsif ($ENV{'form.upfiletype'} eq 'tab') {
+ my $i=0;
+ foreach (split(/\t+/,$record)) {
+ my $field=$_;
+ $field=~s/^(\"|\')//;
+ $field=~s/(\"|\')$//;
+ $components{$i}=$field;
+ $i++;
+ }
+ } else {
+ my @allfields=split(/\,/,$record);
+ my $i=0;
+ my $j;
+ for ($j=0;$j<=$#allfields;$j++) {
+ my $field=$allfields[$j];
+ if ($field=~/^\s*(\"|\')/) {
+ my $delimiter=$1;
+ while (($field!~/$delimiter$/) && ($j<$#allfields)) {
+ $j++;
+ $field.=','.$allfields[$j];
+ }
+ $field=~s/^\s*$delimiter//;
+ $field=~s/$delimiter\s*$//;
+ }
+ $components{$i}=$field;
+ $i++;
+ }
+ }
+ return %components;
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * upfile_select_html()
+
+Return HTML code to select a file from the users machine and specify
+the file type.
+
+=cut
+
+######################################################
+######################################################
+sub upfile_select_html {
+ my %Types = (
+ csv => &mt('CSV (comma separated values, spreadsheet)'),
+ space => &mt('Space separated'),
+ tab => &mt('Tabulator separated'),
+# xml => &mt('HTML/XML'),
+ );
+ my $Str = '<input type="file" name="upfile" size="50" />'.
+ '<br />Type: <select name="upfiletype">';
+ foreach my $type (sort(keys(%Types))) {
+ $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
+ }
+ $Str .= "</select>\n";
+ return $Str;
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * csv_print_samples($r,$records)
+
+Prints a table of sample values from each column uploaded $r is an
+Apache Request ref, $records is an arrayref from
+&Apache::loncommon::upfile_record_sep
+
+=cut
+
+######################################################
+######################################################
+sub csv_print_samples {
+ my ($r,$records) = @_;
+ my (%sone,%stwo,%sthree);
+ %sone=&record_sep($$records[0]);
+ if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
+ if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
+ #
+ $r->print(&mt('Samples').'<br /><table border="2"><tr>');
+ foreach (sort({$a <=> $b} keys(%sone))) {
+ $r->print('<th>'.&mt('Column [_1]',($_+1)).'</th>'); }
+ $r->print('</tr>');
+ foreach my $hash (\%sone,\%stwo,\%sthree) {
+ $r->print('<tr>');
+ foreach (sort({$a <=> $b} keys(%sone))) {
+ $r->print('<td>');
+ if (defined($$hash{$_})) { $r->print($$hash{$_}); }
+ $r->print('</td>');
+ }
+ $r->print('</tr>');
+ }
+ $r->print('</tr></table><br />'."\n");
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * csv_print_select_table($r,$records,$d)
+
+Prints a table to create associations between values and table columns.
+
+$r is an Apache Request ref,
+$records is an arrayref from &Apache::loncommon::upfile_record_sep,
+$d is an array of 2 element arrays (internal name, displayed name)
+
+=cut
+
+######################################################
+######################################################
+sub csv_print_select_table {
+ my ($r,$records,$d) = @_;
+ my $i=0;my %sone;
+ %sone=&record_sep($$records[0]);
+ $r->print(&mt('Associate columns with student attributes.')."\n".
+ '<table border="2"><tr>'.
+ '<th>'.&mt('Attribute').'</th>'.
+ '<th>'.&mt('Column').'</th></tr>'."\n");
+ foreach (@$d) {
+ my ($value,$display)=@{ $_ };
+ $r->print('<tr><td>'.$display.'</td>');
+
+ $r->print('<td><select name=f'.$i.
+ ' onchange="javascript:flip(this.form,'.$i.');">');
+ $r->print('<option value="none"></option>');
+ foreach (sort({$a <=> $b} keys(%sone))) {
+ $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
+ }
+ $r->print('</select></td></tr>'."\n");
+ $i++;
+ }
+ $i--;
+ return $i;
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * csv_samples_select_table($r,$records,$d)
+
+Prints a table of sample values from the upload and can make associate samples to internal names.
+
+$r is an Apache Request ref,
+$records is an arrayref from &Apache::loncommon::upfile_record_sep,
+$d is an array of 2 element arrays (internal name, displayed name)
+
+=cut
+
+######################################################
+######################################################
+sub csv_samples_select_table {
+ my ($r,$records,$d) = @_;
+ my %sone; my %stwo; my %sthree;
+ my $i=0;
+ #
+ $r->print('<table border=2><tr><th>'.
+ &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
+ %sone=&record_sep($$records[0]);
+ if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
+ if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
+ #
+ foreach (sort keys %sone) {
+ $r->print('<tr><td><select name="f'.$i.'"'.
+ ' onchange="javascript:flip(this.form,'.$i.');">');
+ foreach (@$d) {
+ my ($value,$display)=@{ $_ };
+ $r->print('<option value="'.$value.'">'.$display.'</option>');
+ }
+ $r->print('</select></td><td>');
+ if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
+ if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
+ if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
+ $r->print('</td></tr>');
+ $i++;
+ }
+ $i--;
+ return($i);
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item clean_excel_name($name)
+
+Returns a replacement for $name which does not contain any illegal characters.
+
+=cut
+
+######################################################
+######################################################
+sub clean_excel_name {
+ my ($name) = @_;
+ $name =~ s/[:\*\?\/\\]//g;
+ if (length($name) > 31) {
+ $name = substr($name,0,31);
+ }
+ return $name;
+}
+
+=pod
+
+=item * check_if_partid_hidden($id,$symb,$udom,$uname)
+
+Returns either 1 or undef
+
+1 if the part is to be hidden, undef if it is to be shown
+
+Arguments are:
+
+$id the id of the part to be checked
+$symb, optional the symb of the resource to check
+$udom, optional the domain of the user to check for
+$uname, optional the username of the user to check for
+
+=cut
+
+sub check_if_partid_hidden {
+ my ($id,$symb,$udom,$uname) = @_;
+ my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
+ $symb,$udom,$uname);
+ my $truth=1;
+ #if the string starts with !, then the list is the list to show not hide
+ if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
+ my @hiddenlist=split(/,/,$hiddenparts);
+ foreach my $checkid (@hiddenlist) {
+ if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
+ }
+ return !$truth;
+}
+
+
+############################################################
+############################################################
+
+=pod
+
+=back
+
+=head1 cgi-bin script and graphing routines
+
+=over 4
+
+=item get_cgi_id
+
+Inputs: none
+
+Returns an id which can be used to pass environment variables
+to various cgi-bin scripts. These environment variables will
+be removed from the users environment after a given time by
+the routine &Apache::lonnet::transfer_profile_to_env.
+
+=cut
+
+############################################################
+############################################################
+my $uniq=0;
+sub get_cgi_id {
+ $uniq=($uniq+1)%100000;
+ return (time.'_'.$uniq);
+}
+
+############################################################
+############################################################
+
+=pod
+
+=item DrawBarGraph
+
+Facilitates the plotting of data in a (stacked) bar graph.
+Puts plot definition data into the users environment in order for
+graph.png to plot it. Returns an <img> tag for the plot.
+The bars on the plot are labeled '1','2',...,'n'.
+
+Inputs:
+
+=over 4
+
+=item $Title: string, the title of the plot
+
+=item $xlabel: string, text describing the X-axis of the plot
+
+=item $ylabel: string, text describing the Y-axis of the plot
+
+=item $Max: scalar, the maximum Y value to use in the plot
+If $Max is < any data point, the graph will not be rendered.
+
+=item $colors: array ref holding the colors to be used for the data sets when
+they are plotted. If undefined, default values will be used.
+
+=item @Values: An array of array references. Each array reference holds data
+to be plotted in a stacked bar chart.
+
+=back
+
+Returns:
+
+An <img> tag which references graph.png and the appropriate identifying
+information for the plot.
+
+=cut
+
+############################################################
+############################################################
+sub DrawBarGraph {
+ my ($Title,$xlabel,$ylabel,$Max,$colors,@Values)=@_;
+ #
+ if (! defined($colors)) {
+ $colors = ['#33ff00',
+ '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
+ '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
+ ];
+ }
+ #
+ my $identifier = &get_cgi_id();
+ my $id = 'cgi.'.$identifier;
+ if (! @Values || ref($Values[0]) ne 'ARRAY') {
+ return '';
+ }
+ my $NumBars = scalar(@{$Values[0]});
+ my %ValuesHash;
+ my $NumSets=1;
+ foreach my $array (@Values) {
+ next if (! ref($array));
+ $ValuesHash{$id.'.data.'.$NumSets++} =
+ join(',',@$array);
+ }
+ #
+ my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
+ if ($NumBars < 10) {
+ $width = 120+$NumBars*15;
+ $xskip = 1;
+ $bar_width = 15;
+ } elsif ($NumBars <= 25) {
+ $width = 120+$NumBars*11;
+ $xskip = 5;
+ $bar_width = 8;
+ } elsif ($NumBars <= 50) {
+ $width = 120+$NumBars*8;
+ $xskip = 5;
+ $bar_width = 4;
+ } else {
+ $width = 120+$NumBars*8;
+ $xskip = 5;
+ $bar_width = 4;
+ }
+ #
+ my @Labels;
+ for (my $i=0;$i<@{$Values[0]};$i++) {
+ push (@Labels,$i+1);
+ }
+ #
+ $Max = 1 if ($Max < 1);
+ if ( int($Max) < $Max ) {
+ $Max++;
+ $Max = int($Max);
+ }
+ $Title = '' if (! defined($Title));
+ $xlabel = '' if (! defined($xlabel));
+ $ylabel = '' if (! defined($ylabel));
+ $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
+ $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
+ $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
+ $ValuesHash{$id.'.y_max_value'} = $Max;
+ $ValuesHash{$id.'.NumBars'} = $NumBars;
+ $ValuesHash{$id.'.NumSets'} = $NumSets;
+ $ValuesHash{$id.'.PlotType'} = 'bar';
+ $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
+ $ValuesHash{$id.'.height'} = $height;
+ $ValuesHash{$id.'.width'} = $width;
+ $ValuesHash{$id.'.xskip'} = $xskip;
+ $ValuesHash{$id.'.bar_width'} = $bar_width;
+ $ValuesHash{$id.'.labels'} = join(',',@Labels);
+ #
+ &Apache::lonnet::appenv(%ValuesHash);
+ return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
+}
+
+############################################################
+############################################################
+
+=pod
+
+=item DrawXYGraph
+
+Facilitates the plotting of data in an XY graph.
+Puts plot definition data into the users environment in order for
+graph.png to plot it. Returns an <img> tag for the plot.
+
+Inputs:
+
+=over 4
+
+=item $Title: string, the title of the plot
+
+=item $xlabel: string, text describing the X-axis of the plot
+
+=item $ylabel: string, text describing the Y-axis of the plot
+
+=item $Max: scalar, the maximum Y value to use in the plot
+If $Max is < any data point, the graph will not be rendered.
+
+=item $colors: Array ref containing the hex color codes for the data to be
+plotted in. If undefined, default values will be used.
+
+=item $Xlabels: Array ref containing the labels to be used for the X-axis.
+
+=item $Ydata: Array ref containing Array refs.
+Each of the contained arrays will be plotted as a seperate curve.
+
+=item %Values: hash indicating or overriding any default values which are
+passed to graph.png.
+Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
+
+=back
+
+Returns:
+
+An <img> tag which references graph.png and the appropriate identifying
+information for the plot.
+
+=cut
+
+############################################################
+############################################################
+sub DrawXYGraph {
+ my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
+ #
+ # Create the identifier for the graph
+ my $identifier = &get_cgi_id();
+ my $id = 'cgi.'.$identifier;
+ #
+ $Title = '' if (! defined($Title));
+ $xlabel = '' if (! defined($xlabel));
+ $ylabel = '' if (! defined($ylabel));
+ my %ValuesHash =
+ (
+ $id.'.title' => &Apache::lonnet::escape($Title),
+ $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
+ $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
+ $id.'.y_max_value'=> $Max,
+ $id.'.labels' => join(',',@$Xlabels),
+ $id.'.PlotType' => 'XY',
+ );
+ #
+ if (defined($colors) && ref($colors) eq 'ARRAY') {
+ $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
+ }
+ #
+ if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
+ return '';
+ }
+ my $NumSets=1;
+ foreach my $array (@{$Ydata}){
+ next if (! ref($array));
+ $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
+ }
+ $ValuesHash{$id.'.NumSets'} = $NumSets-1;
+ #
+ # Deal with other parameters
+ while (my ($key,$value) = each(%Values)) {
+ $ValuesHash{$id.'.'.$key} = $value;
+ }
+ #
+ &Apache::lonnet::appenv(%ValuesHash);
+ return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
+}
+
+############################################################
+############################################################
+
+=pod
+
+=item DrawXYYGraph
+
+Facilitates the plotting of data in an XY graph with two Y axes.
+Puts plot definition data into the users environment in order for
+graph.png to plot it. Returns an <img> tag for the plot.
+
+Inputs:
+
+=over 4
+
+=item $Title: string, the title of the plot
+
+=item $xlabel: string, text describing the X-axis of the plot
+
+=item $ylabel: string, text describing the Y-axis of the plot
+
+=item $colors: Array ref containing the hex color codes for the data to be
+plotted in. If undefined, default values will be used.
+
+=item $Xlabels: Array ref containing the labels to be used for the X-axis.
+
+=item $Ydata1: The first data set
+
+=item $Min1: The minimum value of the left Y-axis
+
+=item $Max1: The maximum value of the left Y-axis
+
+=item $Ydata2: The second data set
+
+=item $Min2: The minimum value of the right Y-axis
+
+=item $Max2: The maximum value of the left Y-axis
+
+=item %Values: hash indicating or overriding any default values which are
+passed to graph.png.
+Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
+
+=back
+
+Returns:
+
+An <img> tag which references graph.png and the appropriate identifying
+information for the plot.
+
+=cut
+
+############################################################
+############################################################
+sub DrawXYYGraph {
+ my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
+ $Ydata2,$Min2,$Max2,%Values)=@_;
+ #
+ # Create the identifier for the graph
+ my $identifier = &get_cgi_id();
+ my $id = 'cgi.'.$identifier;
+ #
+ $Title = '' if (! defined($Title));
+ $xlabel = '' if (! defined($xlabel));
+ $ylabel = '' if (! defined($ylabel));
+ my %ValuesHash =
+ (
+ $id.'.title' => &Apache::lonnet::escape($Title),
+ $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
+ $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
+ $id.'.labels' => join(',',@$Xlabels),
+ $id.'.PlotType' => 'XY',
+ $id.'.NumSets' => 2,
+ $id.'.two_axes' => 1,
+ $id.'.y1_max_value' => $Max1,
+ $id.'.y1_min_value' => $Min1,
+ $id.'.y2_max_value' => $Max2,
+ $id.'.y2_min_value' => $Min2,
+ );
+ #
+ if (defined($colors) && ref($colors) eq 'ARRAY') {
+ $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
+ }
+ #
+ if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
+ ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
+ return '';
+ }
+ my $NumSets=1;
+ foreach my $array ($Ydata1,$Ydata2){
+ next if (! ref($array));
+ $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
+ }
+ #
+ # Deal with other parameters
+ while (my ($key,$value) = each(%Values)) {
+ $ValuesHash{$id.'.'.$key} = $value;
+ }
+ #
+ &Apache::lonnet::appenv(%ValuesHash);
+ return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
+}
+
+############################################################
+############################################################
+
+=pod
+
+=back
+
+=head1 Statistics helper routines?
+
+Bad place for them but what the hell.
+
+=over 4
+
+=item &chartlink
+
+Returns a link to the chart for a specific student.
+
+Inputs:
+
+=over 4
+
+=item $linktext: The text of the link
+
+=item $sname: The students username
+
+=item $sdomain: The students domain
+
+=back
+
+=back
+
+=cut
+
+############################################################
+############################################################
+sub chartlink {
+ my ($linktext, $sname, $sdomain) = @_;
+ my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
+ '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
+ '&chartoutputmode='.HTML::Entities::encode('html, with all links').
+ '">'.$linktext.'</a>';
+}
+
+#######################################################
+#######################################################
+
+=pod
+
+=head1 Course Environment Routines
+
+=over 4
+
+=item &restore_course_settings
+
+=item &store_course_settings
+
+Restores/Store indicated form parameters from the course environment.
+Will not overwrite existing values of the form parameters.
+
+Inputs:
+a scalar describing the data (e.g. 'chart', 'problem_analysis')
+
+a hash ref describing the data to be stored. For example:
+
+%Save_Parameters = ('Status' => 'scalar',
+ 'chartoutputmode' => 'scalar',
+ 'chartoutputdata' => 'scalar',
+ 'Section' => 'array',
+ 'StudentData' => 'array',
+ 'Maps' => 'array');
+
+Returns: both routines return nothing
+
+=cut
+
+#######################################################
+#######################################################
+sub store_course_settings {
+ # save to the environment
+ # appenv the same items, just to be safe
+ my $courseid = $ENV{'request.course.id'};
+ my $coursedom = $ENV{'course.'.$courseid.'.domain'};
+ my ($prefix,$Settings) = @_;
+ my %SaveHash;
+ my %AppHash;
+ while (my ($setting,$type) = each(%$Settings)) {
+ my $basename = 'env.internal.'.$prefix.'.'.$setting;
+ my $envname = 'course.'.$courseid.'.'.$basename;
+ if (exists($ENV{'form.'.$setting})) {
+ # Save this value away
+ if ($type eq 'scalar' &&
+ (! exists($ENV{$envname}) ||
+ $ENV{$envname} ne $ENV{'form.'.$setting})) {
+ $SaveHash{$basename} = $ENV{'form.'.$setting};
+ $AppHash{$envname} = $ENV{'form.'.$setting};
+ } elsif ($type eq 'array') {
+ my $stored_form;
+ if (ref($ENV{'form.'.$setting})) {
+ $stored_form = join(',',
+ map {
+ &Apache::lonnet::escape($_);
+ } sort(@{$ENV{'form.'.$setting}}));
+ } else {
+ $stored_form =
+ &Apache::lonnet::escape($ENV{'form.'.$setting});
+ }
+ # Determine if the array contents are the same.
+ if ($stored_form ne $ENV{$envname}) {
+ $SaveHash{$basename} = $stored_form;
+ $AppHash{$envname} = $stored_form;
+ }
+ }
+ }
+ }
+ my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
+ $coursedom,
+ $ENV{'course.'.$courseid.'.num'});
+ if ($put_result !~ /^(ok|delayed)/) {
+ &Apache::lonnet::logthis('unable to save form parameters, '.
+ 'got error:'.$put_result);
+ }
+ # Make sure these settings stick around in this session, too
+ &Apache::lonnet::appenv(%AppHash);
+ return;
+}
+
+sub restore_course_settings {
+ my $courseid = $ENV{'request.course.id'};
+ my ($prefix,$Settings) = @_;
+ while (my ($setting,$type) = each(%$Settings)) {
+ next if (exists($ENV{'form.'.$setting}));
+ my $envname = 'course.'.$courseid.'.env.internal.'.$prefix.
+ '.'.$setting;
+ if (exists($ENV{$envname})) {
+ if ($type eq 'scalar') {
+ $ENV{'form.'.$setting} = $ENV{$envname};
+ } elsif ($type eq 'array') {
+ $ENV{'form.'.$setting} = [
+ map {
+ &Apache::lonnet::unescape($_);
+ } split(',',$ENV{$envname})
+ ];
+ }
+ }
+ }
+}
+
+############################################################
+############################################################
+
+sub propath {
+ my ($udom,$uname)=@_;
+ $udom=~s/\W//g;
+ $uname=~s/\W//g;
+ my $subdir=$uname.'__';
+ $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
+ my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
+ return $proname;
+}
+
+sub icon {
+ my ($file)=@_;
+ my @file_ext = split(/\./,$file);
+ my $curfext = $file_ext[-1];
+ my $iconname="unknown.gif";
+ my $embstyle = &Apache::loncommon::fileembstyle($curfext);
+ # The unless conditional that follows is a bit of overkill
+ $iconname = $curfext.".gif" unless
+ (!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn');
+ return $Apache::lonnet::perlvar{'lonIconsURL'}."/$iconname";
+}
+
+=pod
+
+=back
+
+=cut
+
1;
__END__;
+