# The LearningOnline Network with CAPA
# Directory Indexer
#
# $Id: lonindexer.pm,v 1.68 2003/06/16 22:09:02 albertel 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/
#
# YEAR=1999
# 5/21/99, 5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)
# 11/23 Gerd Kortemeyer
# YEAR=2000
# 07/20-08/04 H.K. Ng
# YEAR=2001
# 05/9-05/19/2001 H. K. Ng
# 05/21/2001 H. K. Ng
# 05/23/2001 H. K. Ng
# 6/26,7/8 H. K. Ng
# 8/14 H. K. Ng
# 11/30 Matthew Hall
# YEAR=2002
# 6/29/2002 H. K. Ng
#
###
###############################################################################
## ##
## ORGANIZATION OF THIS PERL MODULE ##
## ##
## 1. Description of functions ##
## 2. Modules used by this module ##
## 3. Choices for different output views (detailed, summary, xml, etc) ##
## 4. BEGIN block (to be run once after compilation) ##
## 5. Handling routine called via Apache and mod_perl ##
## 6. Other subroutines ##
## ##
###############################################################################
package Apache::lonindexer;
# ------------------------------------------------- modules used by this module
use strict;
use Apache::lonnet();
use Apache::loncommon();
use Apache::Constants qw(:common);
use Apache::File;
use GDBM_File;
# ---------------------------------------- variables used throughout the module
my %hash; # tied to a user-specific gdbm file
my %dirs; # keys are directories, values are the open/close status
my %language; # has the reference information present in language.tab
# ----- Values which are set by the handler subroutine and are accessible to
# ----- other methods.
my $extrafield; # default extra table cell
my $fnum; # file counter
my $dnum; # directory counter
# ----- Used to include or exclude files with certain extensions.
my @Only = ();
my @Omit = ();
# ----------------------------- Handling routine called via Apache and mod_perl
sub handler {
my $r = shift;
my $c = $r->connection();
$r->content_type('text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
return OK if $r->header_only;
$fnum=0;
$dnum=0;
# Deal with stupid global variables (is there a way around making
# these global to this package? It is just so wrong....)
undef (@Only);
undef (@Omit);
# ------------------------------------- read in machine configuration variables
my $iconpath= $r->dir_config('lonIconsURL') . "/";
my $domain = $r->dir_config('lonDefDomain');
my $role = $r->dir_config('lonRole');
my $loadlim = $r->dir_config('lonLoadLim');
my $servadm = $r->dir_config('lonAdmEMail');
my $sysadm = $r->dir_config('lonSysEMail');
my $lonhost = $r->dir_config('lonHostID');
my $tabdir = $r->dir_config('lonTabDir');
my $fileclr='#ffffe6';
my $line;
my (@attrchk,@openpath);
my $uri=$r->uri;
# -------------------------------------- see if called from an interactive mode
# Get the parameters from the query string
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['catalogmode','launch','acts','mode','form','element',
'only','omit']);
#-------------------------------------------------------------------
my $closebutton='';
my $groupimportbutton='';
my $colspan='';
$extrafield='';
my $diropendb =
"/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_indexer.db";
%hash = ();
{
my %dbfile;
if (tie(%dbfile,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
while(my($key,$value)=each(%dbfile)) {
$hash{$key}=$value;
}
untie(%dbfile);
}
}
{
if ($ENV{'form.launch'} eq '1') {
&start_fresh_session();
}
# -------------------- refresh environment with user database values (in %hash)
&setvalues(\%hash,'form.catalogmode',\%ENV,'form.catalogmode' );
# --------------------- define extra fields and buttons in case of special mode
if ($ENV{'form.catalogmode'} eq 'interactive') {
$extrafield='<td bgcolor="'.$fileclr.'" valign="bottom">'.
'<a name="$anchor"><img src="'.$iconpath.'whitespace1.gif"'.
' border="0" /></td>';
$colspan=" colspan='2' ";
$closebutton=<<END;
<input type="button" name="close" value='CLOSE' onClick="self.close()">
END
}
elsif ($ENV{'form.catalogmode'} eq 'groupimport') {
$extrafield='<td bgcolor="'.$fileclr.'" valign="bottom">'.
'<a name="$anchor"><img src="'.$iconpath.'whitespace1.gif"'.
' border="0" /></td>';
$colspan=" colspan='2' ";
$closebutton=<<END;
<input type="button" name="close" value='CLOSE' onClick="self.close()">
END
$groupimportbutton=<<END;
<input type="button" name="groupimport" value='GROUP IMPORT'
onClick="javascript:select_group()">
END
}
# Additions made by Matthew to make the browser a little easier to deal
# with in the future.
#
# $mode (at this time) indicates if we are in edit mode.
# $form is the name of the form that the URL is placed when the
# selection is made.
# $element is the name of the element in $formname which receives
# the URL.
# &Apache::lonxml::debug('Checking mode, form, element');
&setvalues(\%hash,'form.mode' ,\%ENV,'form.mode' );
&setvalues(\%hash,'form.form' ,\%ENV,'form.form' );
&setvalues(\%hash,'form.element',\%ENV,'form.element');
&setvalues(\%hash,'form.only' ,\%ENV,'form.only' );
&setvalues(\%hash,'form.omit' ,\%ENV,'form.omit' );
# Deal with 'omit' and 'only'
if (exists $ENV{'form.omit'}) {
@Omit = split(',',$ENV{'form.omit'});
}
if (exists $ENV{'form.only'}) {
@Only = split(',',$ENV{'form.only'});
}
my $mode = $ENV{'form.mode'};
my ($form,$element);
if ($mode eq 'edit' || $mode eq 'parmset') {
$form = $ENV{'form.form'};
$element = $ENV{'form.element'};
}
&Apache::lonxml::debug("mode=$mode form=$form element=$element");
# ------ set catalogmodefunctions to have extra needed javascript functionality
my $catalogmodefunctions='';
if ($ENV{'form.catalogmode'} eq 'interactive' or
$ENV{'form.catalogmode'} eq 'groupimport') {
# The if statement below sets us up to use the old version
# by default (ie. if $mode is undefined). This is the easy
# way out. Hopefully in the future I'll find a way to get
# the calls dealt with in a more comprehensive manner.
#
# There is now also mode "simple", which is for the simple version of the rat
#
#
if (!defined($mode) || ($mode ne 'edit' && $mode ne 'parmset')) {
my $location = "/adm/groupsort?catalogmode=groupimport&";
$location .= "mode=".$mode."&";
$location .= "acts=";
$catalogmodefunctions=<<"END";
function select_data(title,url) {
changeTitle(title);
changeURL(url);
self.close();
}
function select_group() {
window.location="$location"+document.forms.fileattr.acts.value;
}
function changeTitle(val) {
if (opener.inf) {
if (opener.inf.document.forms.resinfo.elements.t) {
opener.inf.document.forms.resinfo.elements.t.value=val;
}
}
}
function changeURL(val) {
if (opener.inf) {
if (opener.inf.document.forms.resinfo.elements.u) {
opener.inf.document.forms.resinfo.elements.u.value=val;
}
}
}
END
} elsif ($mode eq 'edit') { # we are in 'edit' mode
my $location = "/adm/groupsort?catalogmode=interactive&";
$location .= "form=$form&element=$element&mode=edit&acts=";
$catalogmodefunctions=<<END;
// mode = $mode
function select_data(title,url) {
changeURL(url);
self.close();
}
function select_group() {
window.location="$location"+document.forms.fileattr.acts.value;
}
function changeURL(val) {
if (window.opener.document) {
window.opener.document.forms["$form"].elements["$element"].value=val;
} else {
alert("The file you selected is: "+val);
}
}
END
} elsif ($mode eq 'parmset') {
my $location = "/adm/groupsort?catalogmode=interactive&";
$location .= "form=$form&element=$element&mode=parmset&acts=";
$catalogmodefunctions=<<END;
// mode = $mode
function select_data(title,url) {
changeURL(url);
self.close();
}
function select_group() {
window.location="$location"+document.forms.fileattr.acts.value;
}
function changeURL(val) {
if (window.opener.document) {
var elementname = "$element"+"_value";
var checkboxname = "$element"+"_setparmval";
window.opener.document.forms["$form"].elements[elementname].value=val;
window.opener.document.forms["$form"].elements[checkboxname].checked=true;
} else {
alert("The file you selected is: "+val);
}
}
END
}
}
$catalogmodefunctions.=<<END;
var acts='';
function rep_dirpath(suffix,val) {
eval("document.forms.dirpath"+suffix+".acts.value=val");
}
END
if ($ENV{'form.catalogmode'} eq 'groupimport') {
$catalogmodefunctions.=<<END;
function queue(val) {
if (eval("document.forms."+val+".filelink.checked")) {
var l=val.length;
var v=val.substring(4,l);
document.forms.fileattr.acts.value+='1a'+v+'b';
}
else {
var l=val.length;
var v=val.substring(4,l);
document.forms.fileattr.acts.value+='0a'+v+'b';
}
}
END
}
# ---------------------------------------------------------------- Print Header
$r->print(<<ENDHEADER);
<html>
<head>
<title>The LearningOnline Network With CAPA Directory Browser</title>
<script type="text/javascript">
$catalogmodefunctions
function openWindow(url, wdwName, w, h, toolbar,scrollbar) {
var options = "width=" + w + ",height=" + h + ",";
options += "resizable=yes,scrollbars="+scrollbar+",status=no,";
options += "menubar=no,toolbar="+toolbar+",location=no,directories=no";
var newWin = window.open(url, wdwName, options);
newWin.focus();
}
function gothere(val) {
window.location=val+'?acts='+document.forms.fileattr.acts.value;
}
</script>
</head>
ENDHEADER
$r->print(&Apache::loncommon::bodytag('Browse Resources'));
# - Evaluate actions from previous page (both cumulatively and chronologically)
if ($ENV{'form.catalogmode'} eq 'groupimport') {
my $acts=$ENV{'form.acts'};
my @Acts=split(/b/,$acts);
my %ahash;
my %achash;
my $ac=0;
# some initial hashes for working with data
foreach (@Acts) {
my ($state,$ref)=split(/a/);
$ahash{$ref}=$state;
$achash{$ref}=$ac;
$ac++;
}
# sorting through the actions and changing the tied database hash
foreach (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) {
my $key=$_;
if ($ahash{$key} eq '1') {
$hash{'store_'.$hash{'pre_'.$key.'_link'}}=
$hash{'pre_'.$key.'_title'};
$hash{'storectr_'.$hash{'pre_'.$key.'_link'}}=
$hash{'storectr'}+0;
$hash{'storectr'}++;
}
if ($ahash{$key} eq '0') {
if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
}
}
}
# deleting the previously cached listing
foreach (keys %hash) {
if ($_ =~ /^pre_/ && $_ =~/link$/) {
my $key = $_;
$key =~ s/^pre_//;
$key =~ s/_[^_]*$//;
delete $hash{'pre_'.$key.'_title'};
delete $hash{'pre_'.$key.'_link'};
}
}
}
# ---------------------------------- get state of file attributes to be showing
if ($ENV{'form.attrs'} ne '') {
for (my $i=0; $i<=8; $i++) {
delete $hash{'display_attrs_'.$i};
if ($ENV{'form.attr'.$i} == 1) {
$attrchk[$i] = 'checked';
$hash{'display_attrs_'.$i} = 1;
}
}
} else {
for (my $i=0; $i<=8; $i++) {
$attrchk[$i] = 'checked' if $hash{'display_attrs_'.$i} == 1;
}
}
# ------------------------------- output state of file attributes to be showing
$r->print(<<END);
<form method="post" name="fileattr" action="$uri"
enctype="application/x-www-form-urlencoded">
<b><font color="#666666">Display file attributes</font></b><br />
<table border=0><tr>
<td><input type="checkbox" name="attr0" value="1" $attrchk[0] /> Title</td>
<td><input type="checkbox" name="attr1" value="1" $attrchk[1] /> Size</td>
<td><input type="checkbox" name="attr2" value="1" $attrchk[2] /> Last access</td>
<td><input type="checkbox" name="attr3" value="1" $attrchk[3] /> Last modified</td>
<td><input type="checkbox" name="attr8" value="1" $attrchk[8] /> All versions</td></tr><tr>
<td><input type="checkbox" name="attr4" value="1" $attrchk[4] /> Author</td>
<td><input type="checkbox" name="attr5" value="1" $attrchk[5] /> Keywords</td>
<td><input type="checkbox" name="attr6" value="1" $attrchk[6] /> Language</td>
<td><input type="checkbox" name="attr7" value="1" $attrchk[7] /> Show Resource</td>
<td> </td>
</tr></table>
<input type="hidden" name="dirPointer" value="on" />
<input type="hidden" name="acts" value="" />
<input type="submit" name="attrs" value="Review" />
<input type="submit" name="attrs" value="Refresh" />
$closebutton
$groupimportbutton
</form>
END
# ----------------- output starting row to the indexed file/directory hierarchy
my $titleclr="#ddffff";
# $r->print(&initdebug());
# $r->print(&writedebug("Omit:@Omit")) if (@Omit);
# $r->print(&writedebug("Only:@Only")) if (@Only);
$r->print("<table width='100\%' border=0><tr><td bgcolor=#777777>\n");
$r->print("<table width='100\%' border=0><tr bgcolor=$titleclr>\n");
$r->print("<td $colspan><b>Name</b></td>\n");
$r->print("<td><b>Title</b></td>\n")
if ($hash{'display_attrs_0'} == 1);
$r->print("<td align=right><b>Size (bytes) ".
"</b></td>\n") if ($hash{'display_attrs_1'} == 1);
$r->print("<td><b>Last accessed</b></td>\n")
if ($hash{'display_attrs_2'} == 1);
$r->print("<td><b>Last modified</b></td>\n")
if ($hash{'display_attrs_3'} == 1);
$r->print("<td><b>Author(s)</b></td>\n")
if ($hash{'display_attrs_4'} == 1);
$r->print("<td><b>Keywords</b></td>\n")
if ($hash{'display_attrs_5'} == 1);
$r->print("<td><b>Language</b></td>\n")
if ($hash{'display_attrs_6'} == 1);
$r->print("<td><b>Resource</b></td>\n")
if ($hash{'display_attrs_7'} == 1);
$r->print('</tr>');
# ----------------- read in what directories have previously been set to "open"
foreach (keys %hash) {
if ($_ =~ /^diropen_status_/) {
my $key = $_;
$key =~ s/^diropen_status_//;
$dirs{$key} = $hash{$_};
}
}
if ($ENV{'form.openuri'}) { # take care of review and refresh options
my $uri=$ENV{'form.openuri'};
if (exists($hash{'diropen_status_'.$uri})) {
my $cursta = $hash{'diropen_status_'.$uri};
$dirs{$uri} = 'open';
$hash{'diropen_status_'.$uri} = 'open';
if ($cursta eq 'open') {
$dirs{$uri} = 'closed';
$hash{'diropen_status_'.$uri} = 'closed';
}
} else {
$hash{'diropen_status_'.$uri} = 'open';
$dirs{$uri} = 'open';
}
}
my $bredir = $ENV{'form.dirPointer'};
my $toplevel;
my $indent = 0;
$uri = $uri.'/' if $uri !~ /.*\/$/;
if ($bredir ne 'on') {
$hash{'top.level'} = $uri;
$toplevel = $uri;
} else {
$toplevel = $hash{'top.level'};
}
# -------------------------------- if not at top level, provide an uplink arrow
if ($toplevel ne '/res/'){
my (@uri_com) = split(/\//,$uri);
pop @uri_com;
my $upone = join('/',@uri_com);
my @list = qw (0);
&display_line ($r,'opened',$upone.'&viewOneUp',0,$upone,@list);
$indent = 1;
}
# -------- recursively go through all the directories and output as appropriate
&scanDir ($r,$toplevel,$indent,\%hash);
# ---------------------------- embed hidden information useful for group import
$r->print("<form name='fnum'>");
$r->print("<input type='hidden' name='fnum' value='$fnum'></form>");
# -------------------------------------------------------------- end the tables
$r->print('</table>');
$r->print('</td></tr></table>');
# --------------------------------------------------- end the output and return
$r->print('</body></html>'."\n");
# } else {
# $r->print('<html><head></head><body>Unable to tie hash to db '.
# 'file</body></html>');
# return OK;
}
if(! $c->aborted()) {
my %dbfile;
if (tie(%dbfile,'GDBM_File',$diropendb,&GDBM_NEWDB(),0640)) {
while (my($key,$value) = each(%hash)) {
$dbfile{$key}=$value;
}
untie(%dbfile);
}
}
return OK;
}
# ----------------------------------------------- recursive scan of a directory
sub scanDir {
my ($r,$startdir,$indent,$hashref)=@_;
my $c = $r->connection();
my ($compuri,$curdir);
my $dirptr=16384;
$indent++;
my %dupdirs = %dirs;
my @list=&get_list($r,$startdir);
foreach my $line (@list) {
return if ($c->aborted());
my ($strip,$dom,undef,$testdir,undef)=split(/\&/,$line,5);
next if $strip =~ /.*\.meta$/;
my (@fileparts) = split(/\./,$strip);
if ($hash{'display_attrs_8'} != 1) {
if (scalar(@fileparts) >= 3) {
my $fext = pop @fileparts;
my $ov = pop @fileparts;
my $fname = join ('.',@fileparts,$fext);
next if (grep /\Q$fname\E/,@list and $ov =~ /\d+/);
}
}
if ($dom eq 'domain') {
$compuri = join('',$strip,'/'); # dom list has /res/<domain name>
$curdir = $compuri;
} else {
# user, dir & file have name only, i.e., w/o path
$compuri = join('',$startdir,$strip,'/');
$curdir = $startdir;
}
my $diropen = 'closed';
if (($dirptr&$testdir) or ($dom =~ /^(domain|user)$/)) {
while (my ($key,$val)= each %dupdirs) {
if ($key eq $compuri and $val eq "open") {
$diropen = "opened";
delete($dupdirs{$key});
delete($dirs{$key});
}
}
}
&display_line($r,$diropen,$line,$indent,$curdir,$hashref,@list);
&scanDir ($r,$compuri,$indent) if $diropen eq 'opened';
}
$indent--;
}
# --------------- get complete matched list based on the uri (returns an array)
sub get_list {
my ($r,$uri)=@_;
my @list;
(my $luri = $uri) =~ s/\//_/g;
if ($ENV{'form.attrs'} eq 'Refresh') {
foreach (keys %hash) {
delete $hash{$_} if ($_ =~ /^dirlist_files_/);
}
}
if ($hash{'dirlist_files'.$luri}) {
@list = split(/\n/,$hash{'dirlist_files_'.$luri});
} else {
@list = &Apache::lonnet::dirlist($uri);
$hash{'dirlist_files_'.$luri} = join('\n',@list);
}
return @list=&match_ext($r,@list);
}
sub initdebug {
return <<ENDJS;
<script>
var debugging = true;
if (debugging) {
var debuggingWindow = window.open('','Debug','width=400,height=300',true);
}
function output(text) {
if (debugging) {
debuggingWindow.document.writeln(text);
}
}
output("<html><head><title>Debugging Window</title></head><body><pre>");
</script>
ENDJS
}
sub writedebug {
my $text = shift;
return "<script>output('$text');</script>";
}
# -------------------- filters out files based on extensions (returns an array)
sub match_ext {
my ($r,@packlist)=@_;
my @trimlist;
my $nextline;
my @fileext;
my $dirptr=16384;
foreach my $line (@packlist) {
chomp $line;
$line =~ s/^\/home\/httpd\/html//;
my @unpackline = split (/\&/,$line);
next if ($unpackline[0] eq '.');
next if ($unpackline[0] eq '..');
my @filecom = split (/\./,$unpackline[0]);
my $fext = pop(@filecom);
my $fnptr = $unpackline[3]&$dirptr;
if ($fnptr == 0 and $unpackline[3] ne "") {
my $embstyle = &Apache::loncommon::fileembstyle($fext);
push @trimlist,$line if (defined($embstyle) &&
($embstyle ne 'hdn' or $fext eq 'meta'));
} else {
push @trimlist,$line;
}
}
@trimlist = sort (@trimlist);
return @trimlist;
}
# ------------------------------- displays one line in appropriate table format
sub display_line {
my ($r,$diropen,$line,$indent,$startdir,$hashref,@list)=@_;
my (@pathfn, $fndir);
my $dirptr=16384;
my $fileclr="#ffffe6";
my $iconpath= $r->dir_config('lonIconsURL') . '/';
my @filecom = split (/\&/,$line);
my @pathcom = split (/\//,$filecom[0]);
my $listname = $pathcom[scalar(@pathcom)-1];
my $fnptr = $filecom[3]&$dirptr;
my $msg = 'View '.$filecom[0].' resources';
$msg = 'Close '.$filecom[0].' directory' if $diropen eq 'opened';
my $tabtag='</td>';
my $i=0;
while ($i<=7) {
$tabtag=join('',$tabtag,"<td> </td>")
if $hash{'display_attrs_'.$i} == 1;
$i++;
}
my $valign = ($hash{'display_attrs_7'} == 1 ? 'top' : 'bottom');
# display uplink arrow
if ($filecom[1] eq 'viewOneUp') {
$r->print("<tr bgcolor=$fileclr>$extrafield");
$r->print("<td valign=$valign>\n");
$r->print ('<form method="post" name="dirpathUP" action="'.$startdir.
'/" '.
'onSubmit="return rep_dirpath(\'UP\','.
'document.forms.fileattr.acts.value)" '.
'enctype="application/x-www-form-urlencoded"'.
'>'."\n");
$r->print ('<input type=hidden name=openuri value="'.
$startdir.'">'."\n");
$r->print ('<input type="hidden" name="acts" value="">'."\n");
$r->print ('<input src="'.$iconpath.'arrow_up.gif"');
$r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
"\n");
$r->print("Up $tabtag</tr></form>\n");
return OK;
}
# Do we have permission to look at this?
return OK if (!&Apache::lonnet::allowed('bre',$startdir.$filecom[0]));
# display domain
if ($filecom[1] eq 'domain') {
$r->print ('<input type="hidden" name="dirPointer" value="on">'."\n")
if ($ENV{'form.dirPointer'} eq "on");
$r->print("<tr bgcolor=$fileclr>$extrafield");
$r->print("<td valign=$valign>");
&begin_form ($r,$filecom[0].'/');
my $anchor = $filecom[0].'/';
$anchor =~ s/\///g;
$r->print ('<a name="'.$anchor.'">');
$r->print ('<input type="hidden" name="acts" value="">');
$r->print ('<input src="'.$iconpath.'folder_pointer_'.
$diropen.'.gif"');
$r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
"\n");
$r->print ('<a href="javascript:gothere(\''.$filecom[0].
'/\')"><img src="'.$iconpath.'server.gif"');
$r->print (' border="0" /></a>'."\n");
$r->print ("Domain - $listname ");
if ($Apache::lonnet::domaindescription{$listname}) {
$r->print("(".$Apache::lonnet::domaindescription{$listname}.
")");
}
$r->print (" $tabtag</tr></form>\n");
return OK;
# display user directory
}
if ($filecom[1] eq 'user') {
$r->print("<tr bgcolor=$fileclr>$extrafield");
$r->print("<td valign=$valign nowrap>\n");
my $curdir = $startdir.$filecom[0].'/';
my $anchor = $curdir;
$anchor =~ s/\///g;
&begin_form ($r,$curdir);
$r->print ('<a name="'.$anchor.'"><img src="'.$iconpath.
'whitespace1.gif" border="0" />'."\n");
$r->print ('<input type="hidden" name="acts" value="">');
$r->print ('<input src="'.$iconpath.'folder_pointer_'.$diropen.
'.gif"');
$r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
"\n");
$r->print ('<a href="javascript:gothere(\''.$curdir.'\')"><img src='.
$iconpath.'quill.gif border="0" name="'.$msg.
'" height="22" /></a>');
my $domain=(split(m|/|,$startdir))[2];
my $plainname=&Apache::loncommon::plainname($listname,$domain);
$r->print ($listname);
if (defined($plainname) && $plainname) { $r->print(" ($plainname) "); }
$r->print ($tabtag.'</tr></form>'."\n");
return OK;
}
# display file
if ($fnptr == 0 and $filecom[3] ne '') {
my $filelink = $startdir.$filecom[0];
my @file_ext = split (/\./,$listname);
my $curfext = $file_ext[-1];
if (@Omit) {
foreach (@Omit) { return OK if ($curfext eq $_); }
}
if (@Only) {
my $skip = 1;
foreach (@Only) { $skip = 0 if ($curfext eq $_); }
return OK if ($skip > 0);
}
# Set the icon for the file
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');
#
$r->print("<tr bgcolor=$fileclr><td nowrap valign='$valign'>");
my $metafile = grep /^\Q$filecom[0]\E\.meta\&/, @list;
my $title;
if ($ENV{'form.catalogmode'} eq 'interactive') {
$title=$listname;
$title = &Apache::lonnet::metadata($filelink,'title')
if ($metafile == 1);
$title=$listname unless $title;
my $titleesc=HTML::Entities::encode($title);
$titleesc=~s/\'/\\'/; #' (clean up this spare quote)
$r->print("<a href=\"javascript:select_data(\'",
$titleesc,"','",$filelink,"')\">");
$r->print("<img src='",$iconpath,"select.gif' border='0' /></a>".
"\n");
$r->print("</td><td valign='$valign' nowrap>");
}
elsif ($ENV{'form.catalogmode'} eq 'groupimport') {
$title=$listname;
$title = &Apache::lonnet::metadata($filelink,'title')
if ($metafile == 1);
$title=$listname unless $title;
my $titleesc=&HTML::Entities::encode($title);
$r->print("<form name='form$fnum'>\n");
$r->print("<input type='checkbox' name='filelink"."' ".
"value='$filelink' onClick='".
"javascript:queue(\"form$fnum\")' ");
if ($hash{'store_'.$filelink}) {
$r->print("checked");
}
$r->print(">\n");
$r->print("<input type='hidden' name='title"."' ".
"value='$titleesc'>\n");
$r->print("</form>\n");
$r->print("</td><td valign='$valign' nowrap>");
$hash{"pre_${fnum}_link"}=$filelink;
$hash{"pre_${fnum}_title"}=$titleesc;
$fnum++;
}
if ($indent > 0 and $indent < 11) {
$r->print("<img src=",$iconpath,"whitespace",$indent,
".gif border='0' />\n");
} elsif ($indent >0) {
my $ten = int($indent/10.);
my $rem = $indent%10.0;
my $count = 0;
while ($count < $ten) {
$r->print("<img src=",$iconpath,
"whitespace10.gif border='0' />\n");
$count++;
}
$r->print("<img src=",$iconpath,"whitespace",$rem,
".gif border='0' />\n") if $rem > 0;
}
$r->print("<img src=$iconpath$iconname border='0' />\n");
$r->print (" <a href=\"javascript:openWindow('".$filelink.
"', 'metadatafile', '450', '500', 'no', 'yes')\";".
" TARGET=_self>$listname</a> ");
$r->print (" (<a href=\"javascript:openWindow('".$filelink.
".meta', 'metadatafile', '400', '450', 'no', 'yes')\"; ".
"TARGET=_self>metadata</a>) ") if ($metafile == 1);
$r->print("</td>\n");
if ($hash{'display_attrs_0'} == 1) {
my $title = &Apache::lonnet::metadata($filelink,'title')
if ($metafile == 1);
$r->print('<td valign=$valign> '.($title eq '' ? ' ' : $title).
' </td>'."\n");
}
$r->print('<td align=right valign=$valign> ',
$filecom[8]," </td>\n")
if $hash{'display_attrs_1'} == 1;
$r->print('<td valign=$valign> '.
(localtime($filecom[9]))." </td>\n")
if $hash{'display_attrs_2'} == 1;
$r->print('<td valign=$valign> '.
(localtime($filecom[10]))." </td>\n")
if $hash{'display_attrs_3'} == 1;
if ($hash{'display_attrs_4'} == 1) {
my $author = &Apache::lonnet::metadata($filelink,'author')
if ($metafile == 1);
$r->print('<td valign=$valign> '.($author eq '' ? ' ' : $author).
" </td>\n");
}
if ($hash{'display_attrs_5'} == 1) {
my $keywords = &Apache::lonnet::metadata($filelink,'keywords')
if ($metafile == 1);
# $keywords = ' ' if (!$keywords);
$r->print('<td valign=$valign> '.($keywords eq '' ? ' ' : $keywords).
" </td>\n");
}
if ($hash{'display_attrs_6'} == 1) {
my $lang = &Apache::lonnet::metadata($filelink,'language')
if ($metafile == 1);
$lang = &Apache::loncommon::languagedescription($lang);
$r->print('<td valign=$valign> '.($lang eq '' ? ' ' : $lang).
" </td>\n");
}
if ($hash{'display_attrs_7'} == 1) {
my $output='';
my $embstyle=&Apache::loncommon::fileembstyle($curfext);
if ($embstyle eq 'ssi') {
$output=&Apache::lonnet::ssi_body($filelink);
$output='<font size="-2">'.$output.'</font>';
} elsif ($embstyle eq 'img') {
$output='<img src="'.$filelink.'" />';
} elsif ($filelink=~/^\/res\/(\w+)\/(\w+)\//) {
$output='<img src="http://'.
$Apache::lonnet::hostname{&Apache::lonnet::homeserver($2,$1)}.
'/cgi-bin/thumbnail.gif?url='.$filelink.'" />';
}
$r->print('<td valign=$valign> '.($output eq '' ? ' ':$output).
" </td>\n");
}
$r->print("</tr>\n");
}
# -- display directory
if ($fnptr == $dirptr) {
my @file_ext = split (/\./,$listname);
my $curfext = $file_ext[scalar(@file_ext)-1];
my $curdir = $startdir.$filecom[0].'/';
my $anchor = $curdir;
$anchor =~ s/\///g;
$r->print("<tr bgcolor=$fileclr>$extrafield<td valign=$valign>");
&begin_form ($r,$curdir);
my $indentm1 = $indent-1;
if ($indentm1 < 11 and $indentm1 > 0) {
$r->print("<img src=",$iconpath,"whitespace",$indentm1,
".gif border='0' />\n");
} else {
my $ten = int($indentm1/10.);
my $rem = $indentm1%10.0;
my $count = 0;
while ($count < $ten) {
$r->print ("<img src=",$iconpath
,"whitespace10.gif border='0' />\n");
$count++;
}
$r->print ("<img src=",$iconpath,"whitespace",$rem,
".gif border='0' />\n") if $rem > 0;
}
$r->print ('<input type="hidden" name="acts" value="">');
$r->print ('<a name="'.$anchor.'"><input src="'.$iconpath.
'folder_pointer_'.$diropen.'.gif"');
$r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
"\n");
$r->print ('<a href="javascript:gothere(\''.$curdir.'\')"><img src="'.
$iconpath.'folder_'.$diropen.'.gif" border="0" /></a>'.
"\n");
$r->print ("$listname$tabtag</tr></form>\n");
}
}
# ------------------- prints the beginning of a form for directory or file link
sub begin_form {
my ($r,$uri) = @_;
my $anchor = $uri;
$anchor =~ s/\///g;
$r->print ('<form method="post" name="dirpath'.$dnum.'" action="'.$uri.
'#'.$anchor.
'" onSubmit="return rep_dirpath(\''.$dnum.'\''.
',document.forms.fileattr.acts.value)" '.
'enctype="application/x-www-form-urlencoded">'."\n");
$r->print ('<input type="hidden" name="openuri" value="'.$uri.'">'.
"\n");
$r->print ('<input type="hidden" name="dirPointer" value="on">'."\n");
$dnum++;
}
# --------- settings whenever the user causes the indexer window to be launched
sub start_fresh_session {
delete $hash{'form.catalogmode'};
delete $hash{'form.mode'};
delete $hash{'form.form'};
delete $hash{'form.element'};
delete $hash{'form.omit'};
delete $hash{'form.only'};
foreach (keys %hash) {
delete $hash{$_} if (/^(pre_|store)/);
}
}
# ------------------------------------------------------------------- setvalues
sub setvalues {
# setvalues is used in registerurl to synchronize the database
# hash and environment hashes
my ($H1,$h1key,$H2,$h2key) =@_;
#
if (exists $H2->{$h2key}) {
$H1->{$h1key} = $H2->{$h2key};
} elsif (exists $H1->{$h1key}) {
$H2->{$h2key} = $H1->{$h1key};
}
}
1;
sub cleanup {
if (tied(%hash)){
&Apache::lonnet::logthis('Cleanup indexer: hash');
}
}
=head1 NAME
Apache::lonindexer - mod_perl module for cross server filesystem browsing
=head1 SYNOPSIS
Invoked by /etc/httpd/conf/srm.conf:
<LocationMatch "^/res.*/$">
SetHandler perl-script
PerlHandler Apache::lonindexer
</LocationMatch>
=head1 INTRODUCTION
This module enables a scheme of browsing across a cross server.
This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.
=head1 BEGIN SUBROUTINE
This routine is only run once after compilation.
=over 4
=item *
Initializes %language hash table.
=back
=head1 HANDLER SUBROUTINE
This routine is called by Apache and mod_perl.
=over 4
=item *
read in machine configuration variables
=item *
see if called from an interactive mode
=item *
refresh environment with user database values (in %hash)
=item *
define extra fields and buttons in case of special mode
=item *
set catalogmodefunctions to have extra needed javascript functionality
=item *
print header
=item *
evaluate actions from previous page (both cumulatively and chronologically)
=item *
output title
=item *
get state of file attributes to be showing
=item *
output state of file attributes to be showing
=item *
output starting row to the indexed file/directory hierarchy
=item *
read in what directories have previously been set to "open"
=item *
if not at top level, provide an uplink arrow
=item *
recursively go through all the directories and output as appropriate
=item *
information useful for group import
=item *
end the tables
=item *
end the output and return
=back
=head1 OTHER SUBROUTINES
=over 4
=item *
scanDir - recursive scan of a directory
=item *
get_list - get complete matched list based on the uri (returns an array)
=item *
match_ext - filters out files based on extensions (returns an array)
=item *
display_line - displays one line in appropriate table format
=item *
begin_form - prints the beginning of a form for directory or file link
=item *
start_fresh_session - settings whenever the user causes the indexer window
to be launched
=back
=cut
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