# The LearningOnline Network
# Create a course
#
# $Id: loncreatecourse.pm,v 1.36 2003/09/08 21:55:46 www 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/
#
# (My Desk
#
# (Internal Server Error Handler
#
# (Login Screen
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
#
# 3/1/1 Gerd Kortemeyer)
#
# 3/1 Gerd Kortemeyer)
#
# 2/14,2/16,2/17,7/6 Gerd Kortemeyer
#
package Apache::loncreatecourse;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::loncommon;
use Apache::lonratedt;
use Apache::londocs;

# -------------------------------------------- Return path to profile directory

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;
} 

# ================================================ Get course directory listing

sub crsdirlist {
    my ($courseid,$which)=@_;
    unless ($which) { $which=''; }
    my %crsdata=&Apache::lonnet::coursedescription($courseid);
    my @listing=&Apache::lonnet::dirlist
	($which,$crsdata{'domain'},$crsdata{'num'},
	 &propath($crsdata{'domain'},$crsdata{'num'}));
    my @output=();
    foreach (@listing) {
	unless ($_=~/^\./) {
	    push (@output,(split(/\&/,$_))[0]);
	}
    }
    return @output;
}

# ============================================================= Read a userfile

sub readfile {
    my ($courseid,$which)=@_;
    my %crsdata=&Apache::lonnet::coursedescription($courseid);
    return &Apache::lonnet::getfile('/uploaded/'.$crsdata{'domain'}.'/'.
				    $crsdata{'num'}.'/'.$which);
}

# ============================================================ Write a userfile

sub writefile {
    (my $courseid, my $which,$ENV{'form.output'})=@_;
    my %crsdata=&Apache::lonnet::coursedescription($courseid);
    return &Apache::lonnet::finishuserfileupload(
					  $crsdata{'num'},$crsdata{'domain'},
					  $crsdata{'home'},
					  'output',$which);
}

# ===================================================================== Rewrite

sub rewritefile {
    my ($contents,%rewritehash)=@_;
    foreach (keys %rewritehash) {
	my $pattern=$_;
	$pattern=~s/(\W)/\\$1/gs;
	my $new=$rewritehash{$_};
	$contents=~s/$pattern/$new/gs;
    }
    return $contents;
}

# ============================================================= Copy a userfile

sub copyfile {
    my ($origcrsid,$newcrsid,$which)=@_;
    unless ($which=~/\.sequence$/) {
	return &writefile($newcrsid,$which,
		      &readfile($origcrsid,$which));
    } else {
	my %origcrsdata=&Apache::lonnet::coursedescription($origcrsid);
	my %newcrsdata= &Apache::lonnet::coursedescription($newcrsid);
	return &writefile($newcrsid,$which,
		 &rewritefile(
                     &readfile($origcrsid,$which),
	    (
       '/uploaded/'.$origcrsdata{'domain'}.'/'.$origcrsdata{'num'}.'/'
    => '/uploaded/'. $newcrsdata{'domain'}.'/'. $newcrsdata{'num'}.'/'
            )));
    }
}

# =============================================================== Copy a dbfile

sub copydb {
    my ($origcrsid,$newcrsid,$which)=@_;
    $which=~s/\.db$//;
    my %origcrsdata=&Apache::lonnet::coursedescription($origcrsid);
    my %newcrsdata= &Apache::lonnet::coursedescription($newcrsid);
    my %data=&Apache::lonnet::dump
	($which,$origcrsdata{'domain'},$origcrsdata{'num'});
    return &Apache::lonnet::put
	($which,\%data,$newcrsdata{'domain'},$newcrsdata{'num'});
}

# ========================================================== Copy resourcesdata

sub copyresourcedb {
    my ($origcrsid,$newcrsid)=@_;
    my %origcrsdata=&Apache::lonnet::coursedescription($origcrsid);
    my %newcrsdata= &Apache::lonnet::coursedescription($newcrsid);
    my %data=&Apache::lonnet::dump
	('resourcedata',$origcrsdata{'domain'},$origcrsdata{'num'});
    $origcrsid=~s/^\///;
    $origcrsid=~s/\//\_/;
    $newcrsid=~s/^\///;
    $newcrsid=~s/\//\_/;
    my %newdata=();
    undef %newdata;
    my $startdate=$data{$origcrsid.'.0.opendate'};
    my $today=time;
    my $delta=0;
    if ($startdate) {
	my $oneday=60*60*24;
	$delta=$today-$startdate;
	$delta=int($delta/$oneday)*$oneday;
    }
# ugly retro fix for broken version of types
    foreach (keys %data) {
	if ($_=~/\wtype$/) {
	    my $newkey=$_;
	    $newkey=~s/type$/\.type/;
	    $data{$newkey}=$data{$_};
	    delete $data{$_};
	}
    }
# adjust dates
    foreach (keys %data) {
	my $thiskey=$_;
	$thiskey=~s/^$origcrsid/$newcrsid/;
	$newdata{$thiskey}=$data{$_};
	if ($data{$_.'.type'}=~/^date/) {
	    $newdata{$thiskey}=$newdata{$thiskey}+$delta;
	}
    }
    return &Apache::lonnet::put
	('resourcedata',\%newdata,$newcrsdata{'domain'},$newcrsdata{'num'});
}

# ========================================================== Copy all userfiles

sub copyuserfiles {
    my ($origcrsid,$newcrsid)=@_;
    foreach (&crsdirlist($origcrsid,'userfiles')) {
	&copyfile($origcrsid,$newcrsid,$_);
    }
}
# ========================================================== Copy all userfiles

sub copydbfiles {
    my ($origcrsid,$newcrsid)=@_;
    foreach (&crsdirlist($origcrsid)) {
	if ($_=~/\.db$/) {
	    unless 
             ($_=~/^(nohist\_|discussiontimes|classlist|versionupdate|resourcedata)/) {
		 &copydb($origcrsid,$newcrsid,$_);
	     }
	}
    }
}

# ======================================================= Copy all course files

sub copycoursefiles {
    my ($origcrsid,$newcrsid)=@_;
    &copyuserfiles($origcrsid,$newcrsid);
    &copydbfiles($origcrsid,$newcrsid);
    &copyresourcedb($origcrsid,$newcrsid);
}

# ===================================================== Phase one: fill-in form

sub print_course_creation_page {
    my $r=shift;
    my $defdom=$ENV{'request.role.domain'};
    my %host_servers = &Apache::loncommon::get_library_servers($defdom);
    my $course_home = '<select name="course_home" size="1">'."\n";
    foreach my $server (sort(keys(%host_servers))) {
        $course_home .= qq{<option value="$server"};
        if ($server eq $Apache::lonnet::perlvar{'lonHostID'}) {
            $course_home .= " selected ";
        }
        $course_home .= qq{>$server $host_servers{$server}</option>};
    }
    $course_home .= "\n</select>\n";
    my $domform = &Apache::loncommon::select_dom_form($defdom,'ccdomain');
    my $bodytag=&Apache::loncommon::bodytag('Create a New Course');
    my $helplink=&Apache::loncommon::help_open_topic('Create_Course','Help on Creating Courses');
    my $cloneform=&Apache::loncommon::select_dom_form
	($ENV{'request.role.domain'},'clonedomain').
		     &Apache::loncommon::selectcourse_link
		     ('ccrs','clonecourse','clonedomain');
    my $coursebrowserjs=&Apache::loncommon::coursebrowser_javascript();
    $r->print(<<ENDDOCUMENT);
<html>
<script language="JavaScript" type="text/javascript">
var editbrowser = null;
function openbrowser(formname,elementname) {
    var url = '/res/?';
    if (editbrowser == null) {
        url += 'launch=1&';
    }
    url += 'catalogmode=interactive&';
    url += 'mode=edit&';
    url += 'form=' + formname + '&';
    url += 'element=' + elementname + '&';
    url += 'only=sequence' + '';
    var title = 'Browser';
    var options = 'scrollbars=1,resizable=1,menubar=0';
    options += ',width=700,height=600';
    editbrowser = open(url,title,options,'1');
    editbrowser.focus();
}
</script>
$coursebrowserjs
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
$bodytag
$helplink
<form action="/adm/createcourse" method="post" name="ccrs">
<h2>Course Information</h2>
<p>
<b>Course Title:</b>
<input type="text" size="50" name="title">
</p><p>
<b>Course Home Server:</b>$course_home
</p><p>
<b>Course ID/Number (optional)</b>
<input type="text" size="30" name="crsid">
</p>
<h2>Course Content</h2>
<table border="2">
<tr><th>Completely new course</th><th>Clone an existing course</th></tr>
<tr><td>
<p>
<b>Map:</b>
<input type="text" size="50" name="topmap">
<a href="javascript:openbrowser('ccrs','topmap')">Select Map</a>
</p><p>
<b>Do NOT generate as standard course</b><br /> 
(only check if you know what you are doing):
<input type="checkbox" name="nonstandard">
</p>
<p>
<b>First Resource</b><br />(standard courses only):
<input type="radio" name="firstres" value="blank">Blank
&nbsp;
<input type="radio" name="firstres" value="syl" checked>Syllabus
&nbsp;
<input type="radio" name="firstres" value="nav">Navigate
</p>
</td><td>
Course ID: <input input type="text" size="25" name="clonecourse" value="" />
<br />
Domain: 
$cloneform<br />&nbsp;<br />
Additional settings, if specified below, will override cloned settings.
</td></tr>
</table>
<h2>Assessment Parameters</h2>
<p>
<b>Open all assessments: </b>
<input type="checkbox" name="openall" checked>
</p>
<h2>Messaging</h2>
<p>
<b>Set course policy feedback to Course Coordinator: </b>
<input type="checkbox" name="setpolicy" checked>
</p><p>
<b>Set content feedback to Course Coordinator: </b>
<input type="checkbox" name="setcontent" checked>
</p>
<h2>Communication</h2>
<p>
<b>Disable student resource discussion: </b>
<input type="checkbox" name="disresdis" /> <br />
<b>Disable student use of chatrooms: </b>
<input type="checkbox" name="disablechat" />
</p>
<h2>Access Control</h2>
<p>
<b>Students need access key to enter course: </b>
<input type="checkbox" name="setkeys" />
</p>
<h2>Course Coordinator</h2>
<p>
<b>Username:</b> <input type="text" size="15" name="ccuname" />
</p><p>
<b>Domain:</b> $domform
</p><p>
<b>Immediately expire own role as Course Coordinator:</b>
<input type="checkbox" name="expireown" checked>
</p><p>
<input type="hidden" name="phase" value="two" />
<input type="submit" value="Open Course">
</p>
</form>
</body>
</html>
ENDDOCUMENT
}

# ====================================================== Phase two: make course

sub create_course {
    my $r=shift;
    my $topurl='/res/'.&Apache::lonnet::declutter($ENV{'form.topmap'});
    my $ccuname=$ENV{'form.ccuname'};
    my $ccdomain=$ENV{'form.ccdomain'};
    $ccuname=~s/\W//g;
    $ccdomain=~s/\W//g;
    my $cdescr=$ENV{'form.title'};
    my $curl=$ENV{'form.topmap'};
    my $bodytag=&Apache::loncommon::bodytag('Create a New Course');
    $r->print(<<ENDENHEAD);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
$bodytag
ENDENHEAD
    #
    # Verify data
    #
    # Check the veracity of the course coordinator
    if (&Apache::lonnet::homeserver($ccuname,$ccdomain) eq 'no_host') {
        $r->print('No such user '.$ccuname.' at '.$ccdomain.'</body></html>');
	return;
    }
    # Check the proposed home server for the course
    my %host_servers = &Apache::loncommon::get_library_servers
        ($ENV{'request.role.domain'});
    if (! exists($host_servers{$ENV{'form.course_home'}})) {
        $r->print('Invalid home server for course: '.
                  $ENV{'form.course_home'}.'</body></html>');
        return;
    }
#
# Open course
#
    my %cenv=();
    my $courseid=&Apache::lonnet::createcourse($ENV{'request.role.domain'},
                                               $cdescr,$curl,
                                               $ENV{'form.course_home'},
                                               $ENV{'form.nonstandard'});

    # Note: The testing routines depend on this being output; see 
    # Utils::Course. This needs to at least be output as a comment
    # if anyone ever decides to not show this, and Utils::Course::new
    # will need to be suitably modified.
    $r->print('New LON-CAPA Course ID: '.$courseid.'<br>');
#
# Check if created correctly
#
    my ($crsudom,$crsunum)=($courseid=~/^\/(\w+)\/(\w+)$/);
    my $crsuhome=&Apache::lonnet::homeserver($crsunum,$crsudom);
    $r->print('Created on: '.$crsuhome.'<br>');
#
# Are we cloning?
#
    my $cloneid='';
    if (($ENV{'form.clonecourse'}) && ($ENV{'form.clonedomain'})) {
	$cloneid='/'.$ENV{'form.clonedomain'}.'/'.$ENV{'form.clonecourse'};
        my ($clonecrsudom,$clonecrsunum)=($cloneid=~/^\/(\w+)\/(\w+)$/);
	my $clonehome=&Apache::lonnet::homeserver($clonecrsunum,$clonecrsudom);
	if ($clonehome eq 'no_host') {
	    $r->print(
    '<br /><font color="red">Attempting to clone non-existing course '.$cloneid.'</font>');
	} else {
	    $r->print(
    '<br /><font color="green">Cloning course from '.$clonehome.'</font>');
# Copy all files
	    &copycoursefiles($cloneid,$courseid);
# Restore title
	    $cenv{'description'}=$cdescr;
	    $cenv{'clonedfrom'}=$cloneid;
	}
    }
#
# Set environment (will override cloned, if existing)
#
    if ($ENV{'form.crsid'}) {
        $cenv{'courseid'}=$ENV{'form.crsid'};
    }
    if (($ccdomain) && ($ccuname)) {
       if ($ENV{'form.setpolicy'}) {
           $cenv{'policy.email'}=$ccuname.':'.$ccdomain;
       }
       if ($ENV{'form.setcontent'}) {
           $cenv{'question.email'}=$ccuname.':'.$ccdomain;
       }
    }
    if ($ENV{'form.setkeys'}) {
       $cenv{'keyaccess'}='yes';
    }
    if ($ENV{'form.disresdis'}) {
        $cenv{'pch.roles.denied'}='st';
    }
    if ($ENV{'form.disablechat'}) {
        $cenv{'plc.roles.denied'}='st';
    }

    # Record we've not yet viewed the Course Initialization Helper for this 
    # course
    $cenv{'course.helper.not.run'} = 1;
    #
    # Use new Randomseed
    #
    $cenv{'rndseed'}=&Apache::lonnet::latest_rnd_algorithm_id();;
    #
    # By default, use standard grading
    $cenv{'grading'} = 'standard';

    $r->print('<br />Setting environment: '.                 
          &Apache::lonnet::put('environment',\%cenv,$crsudom,$crsunum).'<br>');
#
# Open all assignments
#
    if ($ENV{'form.openall'}) {
       my $storeunder=$crsudom.'_'.$crsunum.'.0.opendate';
       my %storecontent = ($storeunder         => time,
                           $storeunder.'.type' => 'date_start');
       
       $r->print('Opening all assignments: '.&Apache::lonnet::cput
                 ('resourcedata',\%storecontent,$crsudom,$crsunum).'<br>');
   }
#
# Set first page
#
    unless (($ENV{'form.nonstandard'}) || ($ENV{'form.firstres'} eq 'blank')) {
	$r->print('Setting first resource: ');
        my ($errtext,$fatal)=
           &Apache::londocs::mapread($crsunum,$crsudom,'default.sequence');
        $r->print(($fatal?$errtext:'read ok').' - ');
        my $title; my $url;
        if ($ENV{'form.firstres'} eq 'syl') {
	    $title='Syllabus';
            $url='/public/'.$crsudom.'/'.$crsunum.'/syllabus';
        } else {
            $title='Navigate Contents';
            $url='/adm/navmaps';
        }
        $Apache::lonratedt::resources[1]=$title.':'.$url.':false:start:res';
        ($errtext,$fatal)=
           &Apache::londocs::storemap($crsunum,$crsudom,'default.sequence');
        $r->print(($fatal?$errtext:'write ok').'<br>');
  }
#
# Make current user course adminstrator
#
    my $end=undef;
    my $addition='';
    if ($ENV{'form.expireown'}) { $end=time+5; $addition='expired'; }
    $r->print('Assigning '.$addition.' role of course coordinator to self: '.
    &Apache::lonnet::assignrole(
     $ENV{'user.domain'},$ENV{'user.name'},$courseid,'cc',$end).'<br>');
#
# Make additional user course administrator
#
   if (($ccdomain) && ($ccuname)) {
    $r->print('Assigning role of course coordinator to '.
               $ccuname.' at '.$ccdomain.': '.
    &Apache::lonnet::assignrole($ccdomain,$ccuname,$courseid,'cc').'<p>');
   }
    if ($ENV{'form.setkeys'}) {
	$r->print(
 '<p><a href="/adm/managekeys?cid='.$crsudom.'_'.$crsunum.'">Manage Access Keys</a></p>');
    }
    $r->print('<p>Roles will be active at next login.</p></body></html>');
}

# ===================================================================== Handler
sub handler {
    my $r = shift;

    if ($r->header_only) {
       $r->content_type('text/html');
       $r->send_http_header;
       return OK;
    }

    if (&Apache::lonnet::allowed('ccc',$ENV{'request.role.domain'})) {
       $r->content_type('text/html');
       $r->send_http_header;

       if ($ENV{'form.phase'} eq 'two') {
           &create_course($r);
       } else {
	   &print_course_creation_page($r);
       }
   } else {
      $ENV{'user.error.msg'}=
        "/adm/createcourse:ccc:0:0:Cannot create courses";
      return HTTP_NOT_ACCEPTABLE; 
   }
   return OK;
} 

1;
__END__