# 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/
#


package Apache::portfolio;
use strict;
use Apache::Constants qw(:common :http);
use Apache::loncommon;
use Apache::lonnet;
use Apache::lontexconvert;
use Apache::lonfeedback;
use Apache::lonlocal;

# receives a file name assumed to reside in username/userfiles/portfolio/
# returns a form consisting of a single submit button labeled with the filename
sub makeAnchor {
    my ($fileName, $currentPath) = @_;
    my $anchor = '<a href="/adm/portfolio?selectfile='.$fileName.'&currentpath='.$currentPath.'">'.$fileName.'</a>';
#    my $button = '
#		<form method="POST" action="/adm/portfolio">
#		<input type="hidden" name="selectfile" value="'.$fileName.'">
#		<input type="submit" value="'.$fileName.'" name="storeupl">
#		</form>
#		';
    return $anchor;
}

# returns html with <br /> separated contents of the directory
# returns a <strong>currentFile</strong> (bolds the selected file/dir)
sub displayDirectory {
    my ($currentPath, $currentFile, $isDir, @dirList,) = @_;
    my $displayOut='';	
    my $fileName;
    my $upPath;
    if ($currentPath ne '/') {
	$displayOut = 'Listing of '.$currentPath.'<br /><hr />'.
	    # provides the "up one directory level" function
	    # it means shortening the currentpath to the parent directory
	    $currentPath =~ m:(^/.*)(/.*/$ ):;
	if ($1 ne '/') {
	    $upPath = $1.'/';
	} else {
	    $upPath = $1;
	}
		
	$displayOut = $displayOut.'<a href="/adm/portfolio?selectfile=updir&currentpath='.$upPath.'">..</a><br />';
    } else {
	$displayOut = $displayOut.'at root '.$currentPath.'<br />';
    }
    while ($fileName = shift @dirList) {
	if (($fileName ne './') && ($fileName ne '../')) {
	    if ($fileName =~ m:/$:) {
		# handle directories different from files
		if ($fileName eq $currentFile) {
		    #checks to bold the selected file
		    $displayOut = $displayOut.'<strong>'.(&makeAnchor($fileName, $currentPath.$fileName).'</strong><br />');
		} else {
		    $displayOut = $displayOut.(&makeAnchor($fileName, $currentPath.$fileName).'<br />');
		}
	    } else {
		if ($fileName eq $currentFile) {
		    #checks to bold the selected file
		    $displayOut = $displayOut.'<strong>'.(&makeAnchor($fileName, $currentPath).'</strong><br />');
		} else {
		    $displayOut = $displayOut.(&makeAnchor($fileName, $currentPath).'<br />');
		}
	    }
	}
    }
    #$displayOut = $displayOut.
    return $displayOut;
}

# returns html to offer user appropriate actions depending on selected
# file/directory
sub displayActions {
    my $displayOut;
    my ($currentPath, $currentFile, $isDir, $isFile) = @_;
#   $displayOut = 'here are actions for '.$currentFile;
    if ($isDir){
	$displayOut = 'Directory';
    }
    if ($isFile){
	$displayOut = 'File';
    }
    
    $displayOut = $displayOut.'<form method="POST">
			<input type="hidden" name="selectfile" 
			value="'.$currentFile.'">
			<input type="hidden" name="fileaction" value="delete"> 
			<center>
			<input type="submit" 
			
			value="Delete '.$currentFile.'">
			</center>
			</form>
			<hr />
			<form method="POST">
			<input type="hidden" name="selectfile" 
			value="'.$currentFile.'">
			<input type="hidden" name="fileaction" value="rename"> 
			<input type="input" name="filenewname" value="Type new name here"> 
			<input type="submit" 
			value="Rename '.$currentFile.'">
			</form>
			<hr>';
    $displayOut = $displayOut.'<hr>Add a file to your portfolio';
    # file upload form 
    $displayOut = $displayOut.'<form method="post" enctype="multipart/form-data">';
    $displayOut = $displayOut.'<input name="uploaddoc" type="file">'.
	'<input type="hidden" name="currentpath" value="'.$currentPath.'">'.
	'<input type="submit" name="storeupl" value="Upload">'.
	'</form><hr>';
    $displayOut = $displayOut.'<form method="POST">
		<input name="subdir" type="text" >
		<input type="submit" value="Create Subdirectory">
		</form>
			';
    return $displayOut;
}

sub handler {
    # this handles file management
    my ($r)=@_;
    my @dirList; # will hold directory listing as array
    my $udir; # returned from home server
    my $currentPath; # path assuming /userfiles/portfolio/ as root
    my $currentFile; # directory or file contained in $pathToRoot.$currentPath
    my $action; # delete, rename, makedirectory, removedirectory,
    my $filenewname; # for rename action (guess what we do with it!)
    my $isFile;
    my $isDir;
    # send header
    $r->content_type('text/html');
    $r->send_http_header;
    $r->print('<html><head><title>'.
              'Portfolio Management'.
              "</title></head>\n");

    $r->print('
	<body bgcolor="dogfood">
	<blockquote>');
    #grab stuff that was sent
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                            ['selectfile','currentpath',
					     'currentfile']);
    $r->print ('<br />CP= '.$ENV{'form.currentpath'}.'<br />');
    # currentPath and currentFile need to be set for the rest of things to happen
    # sometimes, currentFile will be passed by a form field, selectedfile
    # if there is no 'form.selectedfile' then the current directory is 
    # considered as selected 
    if ($ENV{'form.currentpath'}) {
	$currentPath = $ENV{'form.currentpath'};
    } else {
	$currentPath = '/';
    }
    if ($ENV{'form.selectfile'}) {
	$r->print('<br />found selectfile'.$ENV{'form.selectfile'} .'<br />');
	# have to check if the selected file is a subdirectory
	if ($ENV{'form.selectfile'} =~ /-\(Dir\)/) {
	    # $currentPath =~ /\-\(Dir\)/;
	    $currentPath = $`.'/';
	    $r->print('<br />'.$currentPath.'<br />');
	}
	$currentFile = $ENV{'form.selectfile'};
    } else {
	$currentFile = '';
    }
    # if we're uploading a file, we need to do it early so it will show in the directory list
    if ($ENV{'form.uploaddoc.filename'}) {
	$r->print($ENV{'form.storeupl'}.'<br />');
	$r->print(&Apache::lonnet::userfileupload('uploaddoc','','portfolio'.$currentPath).'<br />');	
    }
    # similarly, we need to delete or rename files before getting directory list
    if ($ENV{'form.selectfile'}) {
	if ($ENV{'form.fileaction'} eq 'delete') {
	    &Apache::lonnet::portfoliomanage($ENV{'form.selectfile'}, 'delete', undef );
	    $currentFile = '';
	} elsif($ENV{'form.fileaction'} eq 'rename') {
	    &Apache::lonnet::portfoliomanage($ENV{'form.selectfile'}, 'rename', $ENV{'form.filenewname'} );
	    # $r->print('We will rename your file');
	}
    }
    # we always need $dirList, plus this will return information about the current file
    # as well as information about he home server directory structure, specifically
    # the path to the users userfiles directory.	
    @dirList = split /<br\s\/>/, (&Apache::lonnet::portfoliolist($currentPath, $currentFile));
    # portfoliolist returns isdir, isfile and udir as the final array elements
    # we'll pop them off the bottom of the array, and put them where they belong
    
    # $londcall added to help debug
    my $londcall = pop(@dirList);
    $r->print('<br />udir '.$londcall.'<br />');
    $udir = pop(@dirList);
    $r->print('<br />path returned '.$udir.'<br />');
    $isFile = pop(@dirList);
#   $r->print('<br />isfile '.$isFile.'<br />');
    $isDir = pop(@dirList);
#   $r->print('<br />isdir '.$isDir.'<br />');
#   return OK if $r->header_only;
    # Stuff to maintain proper setting for selected file
    if ($ENV{'form.selectfile'}) {
	if ($ENV{'form.fileaction'} eq 'delete') {
	    &Apache::lonnet::portfoliomanage($ENV{'form.selectfile'}, 'delete', undef );
	    $ENV{'portfolio.file'} = 'Selected File Deleted';
	} elsif($ENV{'form.fileaction'} eq 'rename') {
	    &Apache::lonnet::portfoliomanage($ENV{'form.selectfile'}, 'rename', $ENV{'form.filenewname'} );
#			$r->print('We will rename your file');
	} else {
	    
	    # Remember user's file selection for later
	    $ENV{'portfolio.file'} = $ENV{'form.selectfile'};
	    # offer things user can do with selected file
	}
    } else {
	unless ($ENV{'portfolio.file'}) {
	    $ENV{'portfolio.file'} = 'No File Selected';
	}
    }
    ##############################
    #
    # Display begins here
    #
    ##############################
    $r->print('<hr /> start ');
    $r->print($udir);
    $r->print('<table border=1><tr><td>');
    $r->print(&displayDirectory($currentPath, $currentFile, $isDir, @dirList));
    $r->print('</td>><td>');
    $r->print(&displayActions($currentPath, $currentFile, $isDir, $isFile));
    $r->print('</td>></tr></table>');
    $r->print('<br />end display<br /><hr />');
    $r->print('</blockquote></body>');
    return OK;
}

1;
__END__