# The LearningOnline Network with CAPA
# Handler to retrieve an old version of a file
#
# (Publication Handler
#
# (TeX Content Handler
#
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
# 03/23 Guy Albertelli
# 03/24,03/29 Gerd Kortemeyer)
#
# 03/31,04/03 Gerd Kortemeyer
package Apache::lonretrieve;
use strict;
use Apache::File;
use File::Copy;
use Apache::Constants qw(:common :http :methods);
sub phaseone {
my ($r,$fn,$uname,$udom)=@_;
my $docroot=$r->dir_config('lonDocRoot');
my $urldir='/res/'.$udom.'/'.$uname.$fn;
$urldir=~s/\/[^\/]+$/\//;
my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
my $resdir=$resfn;
$resdir=~s/\/[^\/]+$/\//;
$fn=~/^\/(.+)\.(\w+)$/;
my $main=$1;
my $suffix=$2;
$r->print('<form action=/adm/retrieve method=post>'.
'<input type=hidden name=filename value="'.$fn.'">'.
'<input type=hidden name=phase value=two>'.
'<table border=2><tr><th>Select</th><th>Version</th>'.
'<th>Became this version on ...</th>'.
'<th>Metadata</th></tr>');
my $filename;
opendir(DIR,$resdir);
while ($filename=readdir(DIR)) {
if ($filename=~/^$main\.(\d+)\.$suffix$/) {
my $version=$1;
my ($rdev,$rino,$rmode,$rnlink,
$ruid,$rgid,$rrdev,$rsize,
$ratime,$rmtime,$rctime,
$rblksize,$rblocks)=stat($resdir.'/'.$filename);
$r->print('<tr><td><input type=radio name=version value="'.
$version.'"></td><th>'.$version.'</th><td>'.
localtime($rmtime).'</td><td>'.
'<a href="'.$urldir.$filename.'.meta" target=cat>'.
'Metadata Version '.$version.'</a></td></tr>');
}
}
closedir(DIR);
my ($rdev,$rino,$rmode,$rnlink,
$ruid,$rgid,$rrdev,$rsize,
$ratime,$rmtime,$rctime,
$rblksize,$rblocks)=stat($resfn);
$r->print('<tr><td><input type=radio name=version value="new"></td>'.
'<th>Current</th><td>'.localtime($rmtime).
'</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
'Metadata current version</a></td></tr></table><p>'.
'<font size=+1 color=red>Retrieval of an old version will '.
'overwrite the file currently in construction space</font><p>'.
'<input type=submit value="Retrieve version"></form>');
}
sub phasetwo {
my ($r,$fn,$uname,$udom)=@_;
if ($ENV{'form.version'}) {
my $version=$ENV{'form.version'};
if ($version eq 'new') {
$r->print('<h3>Retrieving current (most recent) version</h3>');
} else {
$r->print('<h3>Retrieving old version '.$version.'</h3>');
}
my $logfile;
my $ctarget='/home/'.$uname.'/public_html'.$fn;
unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
$r->print(
'<font color=red>No write permission to user directory, FAIL</font>');
}
print $logfile
"\n\n================= Retrieve ".localtime()." ================\n".
"Version $version\n\n";
} else {
$r->print(
'<font size=+1 color=red>Please pick a version to retrieve</font><p>');
&phaseone($r,$fn,$uname,$udom);
}
}
sub handler {
my $r=shift;
my $fn;
if ($ENV{'form.filename'}) {
$fn=$ENV{'form.filename'};
$fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
} else {
$r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
' unspecified filename for retrieval', $r->filename);
return HTTP_NOT_FOUND;
}
unless ($fn) {
$r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
' trying to retrieve non-existing file', $r->filename);
return HTTP_NOT_FOUND;
}
# ----------------------------------------------------------- Start page output
my $uname=$ENV{'user.name'};
my $udom=$ENV{'user.domain'};
$r->content_type('text/html');
$r->send_http_header;
$r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
$r->print(
'<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
$r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
if ($ENV{'form.phase'} eq 'two') {
&phasetwo($r,$fn,$uname,$udom);
} else {
&phaseone($r,$fn,$uname,$udom);
}
$r->print('</body></html>');
return OK;
}
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