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Revision 4209 - (download) (as text) (annotate)
Sat Jul 8 22:23:46 2006 UTC (6 years, 11 months ago) by gage
File size: 48030 byte(s)
Added -override to checkbox for problems already added to this course.  They were sticking when they should not have.

    1 ################################################################################
    2 # WeBWorK Online Homework Delivery System
    3 # Copyright © 2000-2006 The WeBWorK Project, http://openwebwork.sf.net/
    4 # $CVSHeader: webwork-modperl/lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm,v 1.70 2006/07/08 17:29:16 gage Exp $
    5 #
    6 # This program is free software; you can redistribute it and/or modify it under
    7 # the terms of either: (a) the GNU General Public License as published by the
    8 # Free Software Foundation; either version 2, or (at your option) any later
    9 # version, or (b) the "Artistic License" which comes with this package.
   10 #
   11 # This program is distributed in the hope that it will be useful, but WITHOUT
   12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   13 # FOR A PARTICULAR PURPOSE.  See either the GNU General Public License or the
   14 # Artistic License for more details.
   15 ################################################################################
   16 
   17 
   18 package WeBWorK::ContentGenerator::Instructor::SetMaker;
   19 use base qw(WeBWorK::ContentGenerator::Instructor);
   20 
   21 =head1 NAME
   22 
   23 WeBWorK::ContentGenerator::Instructor::SetMaker - Make homework sets.
   24 
   25 =cut
   26 
   27 use strict;
   28 use warnings;
   29 
   30 
   31 use CGI qw(-nosticky);
   32 use WeBWorK::Debug;
   33 use WeBWorK::Form;
   34 use WeBWorK::Utils qw(readDirectory max sortByName);
   35 use WeBWorK::Utils::Tasks qw(renderProblems);
   36 use File::Find;
   37 
   38 require WeBWorK::Utils::ListingDB;
   39 
   40 use constant MAX_SHOW_DEFAULT => 20;
   41 use constant NO_LOCAL_SET_STRING => 'No sets in this course yet';
   42 use constant SELECT_SET_STRING => 'Select a Set from this Course';
   43 use constant SELECT_LOCAL_STRING => 'Select a Problem Collection';
   44 use constant MY_PROBLEMS => '  My Problems  ';
   45 use constant MAIN_PROBLEMS => '  Unclassified Problems  ';
   46 use constant CREATE_SET_BUTTON => 'Create New Set';
   47 use constant ALL_CHAPTERS => 'All Chapters';
   48 use constant ALL_SUBJECTS => 'All Subjects';
   49 use constant ALL_SECTIONS => 'All Sections';
   50 use constant ALL_TEXTBOOKS => 'All Textbooks';
   51 
   52 use constant LIB2_DATA => {
   53   'dbchapter' => {name => 'library_chapters', all => 'All Chapters'},
   54   'dbsection' =>  {name => 'library_sections', all =>'All Sections' },
   55   'dbsubject' =>  {name => 'library_subjects', all => 'All Subjects' },
   56   'textbook' =>  {name => 'library_textbook', all =>  'All Textbooks'},
   57   'textchapter' => {name => 'library_textchapter', all => 'All Chapters'},
   58   'textsection' => {name => 'library_textsection', all => 'All Sections'},
   59   'keywords' =>  {name => 'library_keywords', all => '' },
   60   };
   61 
   62 ## Flags for operations on files
   63 
   64 use constant ADDED => 1;
   65 use constant HIDDEN => (1 << 1);
   66 use constant SUCCESS => (1 << 2);
   67 
   68 ##  for additional problib buttons
   69 my %problib;  ## filled in in global.conf
   70 my %ignoredir = (
   71   '.' => 1, '..' => 1, 'Library' => 1, 'CVS' => 1, 'tmpEdit' => 1,
   72   'headers' => 1, 'macros' => 1, 'email' => 1,
   73 );
   74 
   75 sub prepare_activity_entry {
   76   my $self=shift;
   77   my $r = $self->r;
   78   my $user = $self->r->param('user') || 'NO_USER';
   79   return("In SetMaker as user $user");
   80 }
   81 
   82 ## This is for searching the disk for directories containing pg files.
   83 ## to make the recursion work, this returns an array where the first
   84 ## item is the number of pg files in the directory.  The second is a
   85 ## list of directories which contain pg files.
   86 ##
   87 ## If a directory contains only one pg file and the directory name
   88 ## is the same as the file name, then the directory is considered
   89 ## to be part of the parent directory (it is probably in a separate
   90 ## directory only because it has auxiliary files that want to be
   91 ## kept together with the pg file).
   92 ##
   93 ## If a directory has a file named "=library-ignore", it is never
   94 ## included in the directory menu.  If a directory contains a file
   95 ## called "=library-combine-up", then its pg are included with those
   96 ## in the parent directory (and the directory does not appear in the
   97 ## menu).  If it has a file called "=library-no-combine" then it is
   98 ## always listed as a separate directory even if it contains only one
   99 ## pg file.
  100 
  101 sub get_library_sets {
  102   my $top = shift; my $dir = shift;
  103   # ignore directories that give us an error
  104   my @lis = eval { readDirectory($dir) };
  105   if ($@) {
  106     warn $@;
  107     return (0);
  108   }
  109   return (0) if grep /^=library-ignore$/, @lis;
  110 
  111   my @pgfiles = grep { m/\.pg$/ and (not m/(Header|-text)\.pg$/) and -f "$dir/$_"} @lis;
  112   my $pgcount = scalar(@pgfiles);
  113   my $pgname = $dir; $pgname =~ s!.*/!!; $pgname .= '.pg';
  114   my $combineUp = ($pgcount == 1 && $pgname eq $pgfiles[0] && !(grep /^=library-no-combine$/, @lis));
  115 
  116   my @pgdirs;
  117   my @dirs = grep {!$ignoredir{$_} and -d "$dir/$_"} @lis;
  118   if ($top == 1) {@dirs = grep {!$problib{$_}} @dirs}
  119   foreach my $subdir (@dirs) {
  120     my @results = get_library_sets(0, "$dir/$subdir");
  121     $pgcount += shift @results; push(@pgdirs,@results);
  122   }
  123 
  124   return ($pgcount, @pgdirs) if $top || $combineUp || grep /^=library-combine-up$/, @lis;
  125   return (0,@pgdirs,$dir);
  126 }
  127 
  128 sub get_library_pgs {
  129   my $top = shift; my $base = shift; my $dir = shift;
  130   my @lis = readDirectory("$base/$dir");
  131   return () if grep /^=library-ignore$/, @lis;
  132   return () if !$top && grep /^=library-no-combine$/, @lis;
  133 
  134   my @pgs = grep { m/\.pg$/ and (not m/(Header|-text)\.pg$/) and -f "$base/$dir/$_"} @lis;
  135   my $others = scalar(grep { (!m/\.pg$/ || m/(Header|-text)\.pg$/) &&
  136                               !m/(\.(tmp|bak)|~)$/ && -f "$base/$dir/$_" } @lis);
  137 
  138   my @dirs = grep {!$ignoredir{$_} and -d "$base/$dir/$_"} @lis;
  139   if ($top == 1) {@dirs = grep {!$problib{$_}} @dirs}
  140   foreach my $subdir (@dirs) {push(@pgs, get_library_pgs(0,"$base/$dir",$subdir))}
  141 
  142   return () unless $top || (scalar(@pgs) == 1 && $others) || grep /^=library-combine-up$/, @lis;
  143   return (map {"$dir/$_"} @pgs);
  144 }
  145 
  146 sub list_pg_files {
  147   my ($templates,$dir) = @_;
  148   my $top = ($dir eq '.')? 1 : 2;
  149   my @pgs = get_library_pgs($top,$templates,$dir);
  150   return sortByName(undef,@pgs);
  151 }
  152 
  153 ## Search for set definition files
  154 
  155 sub get_set_defs {
  156   my $topdir = shift;
  157   my @found_set_defs;
  158   # get_set_defs_wanted is a closure over @found_set_defs
  159   my $get_set_defs_wanted = sub {
  160     #my $fn = $_;
  161     #my $fdir = $File::Find::dir;
  162     #return() if($fn !~ /^set.*\.def$/);
  163     ##return() if(not -T $fn);
  164     #push @found_set_defs, "$fdir/$fn";
  165     push @found_set_defs, $_ if m|/set[^/]*\.def$|;
  166   };
  167   find({ wanted => $get_set_defs_wanted, follow_fast=>1, no_chdir=>1}, $topdir);
  168   map { $_ =~ s|^$topdir/?|| } @found_set_defs;
  169   return @found_set_defs;
  170 }
  171 
  172 ## Try to make reading of set defs more flexible.  Additional strategies
  173 ## for fixing a path can be added here.
  174 
  175 sub munge_pg_file_path {
  176   my $self = shift;
  177   my $pg_path = shift;
  178   my $path_to_set_def = shift;
  179   my $end_path = $pg_path;
  180   # if the path is ok, don't fix it
  181   return($pg_path) if(-e $self->r->ce->{courseDirs}{templates}."/$pg_path");
  182   # if we have followed a link into a self contained course to get
  183   # to the set.def file, we need to insert the start of the path to
  184   # the set.def file
  185   $end_path = "$path_to_set_def/$pg_path";
  186   return($end_path) if(-e $self->r->ce->{courseDirs}{templates}."/$end_path");
  187   # if we got this far, this path is bad, but we let it produce
  188   # an error so the user knows there is a troublesome path in the
  189   # set.def file.
  190   return($pg_path);
  191 }
  192 
  193 ## Read a set definition file.  This could be abstracted since it happens
  194 ## elsewhere.  Here we don't have to process so much of the file.
  195 
  196 sub read_set_def {
  197   my $self = shift;
  198   my $r = $self->r;
  199   my $filePathOrig = shift;
  200   my $filePath = $r->ce->{courseDirs}{templates}."/$filePathOrig";
  201   $filePathOrig =~ s/set.*\.def$//;
  202   $filePathOrig =~ s|/$||;
  203   $filePathOrig = "." if ($filePathOrig !~ /\S/);
  204   my @pg_files = ();
  205   my ($line, $got_to_pgs, $name, @rest) = ("", 0, "");
  206   if ( open (SETFILENAME, "$filePath") )    {
  207     while($line = <SETFILENAME>) {
  208       chomp($line);
  209       $line =~ s|(#.*)||; # don't read past comments
  210       if($got_to_pgs) {
  211         unless ($line =~ /\S/) {next;} # skip blank lines
  212         ($name,@rest) = split (/\s*,\s*/,$line);
  213         $name =~ s/\s*//g;
  214         push @pg_files, $name;
  215       } else {
  216         $got_to_pgs = 1 if ($line =~ /problemList\s*=/);
  217       }
  218     }
  219   } else {
  220     $self->addbadmessage("Cannot open $filePath");
  221   }
  222   # This is where we would potentially munge the pg file paths
  223   # One possibility
  224   @pg_files = map { $self->munge_pg_file_path($_, $filePathOrig) } @pg_files;
  225   return(@pg_files);
  226 }
  227 
  228 ## go through past page getting a list of identifiers for the problems
  229 ## and whether or not they are selected, and whether or not they should
  230 ## be hidden
  231 
  232 sub get_past_problem_files {
  233   my $r = shift;
  234   my @found=();
  235   my $count =1;
  236   while (defined($r->param("filetrial$count"))) {
  237     my $val = 0;
  238     $val |= ADDED if($r->param("trial$count"));
  239     $val |= HIDDEN if($r->param("hideme$count"));
  240     push @found, [$r->param("filetrial$count"), $val];
  241     $count++;
  242   }
  243   return(\@found);
  244 }
  245 
  246 #### For adding new problems
  247 
  248 sub add_selected {
  249   my $self = shift;
  250   my $db = shift;
  251   my $setName = shift;
  252   my @past_problems = @{$self->{past_problems}};
  253   my @selected = @past_problems;
  254   my (@path, $file, $selected, $freeProblemID);
  255   $freeProblemID = max($db->listGlobalProblems($setName)) + 1;
  256   my $addedcount=0;
  257 
  258   for $selected (@selected) {
  259     if($selected->[1] & ADDED) {
  260       $file = $selected->[0];
  261       my $problemRecord = $self->addProblemToSet(setName => $setName,
  262         sourceFile => $file, problemID => $freeProblemID);
  263       $freeProblemID++;
  264       $self->assignProblemToAllSetUsers($problemRecord);
  265       $selected->[1] |= SUCCESS;
  266       $addedcount++;
  267     }
  268   }
  269   return($addedcount);
  270 }
  271 
  272 
  273 ############# List of sets of problems in templates directory
  274 
  275 sub get_problem_directories {
  276   my $ce = shift;
  277   my $lib = shift;
  278   my $source = $ce->{courseDirs}{templates};
  279   my $main = MY_PROBLEMS; my $isTop = 1;
  280   if ($lib) {$source .= "/$lib"; $main = MAIN_PROBLEMS; $isTop = 2}
  281   my @all_problem_directories = get_library_sets($isTop, $source);
  282   my $includetop = shift @all_problem_directories;
  283   my $j;
  284   for ($j=0; $j<scalar(@all_problem_directories); $j++) {
  285     $all_problem_directories[$j] =~ s|^$ce->{courseDirs}->{templates}/?||;
  286   }
  287   @all_problem_directories = sortByName(undef, @all_problem_directories);
  288   unshift @all_problem_directories, $main if($includetop);
  289   return (\@all_problem_directories);
  290 }
  291 
  292 ############# Everyone has a view problems line.  Abstract it
  293 sub view_problems_line {
  294   my $internal_name = shift;
  295   my $label = shift;
  296   my $r = shift; # so we can get parameter values
  297   my $result = CGI::submit(-name=>"$internal_name", -value=>$label);
  298 
  299   my %display_modes = %{WeBWorK::PG::DISPLAY_MODES()};
  300   my @active_modes = grep { exists $display_modes{$_} }
  301     @{$r->ce->{pg}->{displayModes}};
  302   push @active_modes, 'None';
  303   # We have our own displayMode since its value may be None, which is illegal
  304   # in other modules.
  305   my $mydisplayMode = $r->param('mydisplayMode') || $r->ce->{pg}->{options}->{displayMode};
  306   $result .= '&nbsp;Display&nbsp;Mode:&nbsp;'.CGI::popup_menu(-name=> 'mydisplayMode',
  307                                                               -values=>\@active_modes,
  308                                                               -default=> $mydisplayMode);
  309   # Now we give a choice of the number of problems to show
  310   my $defaultMax = $r->param('max_shown') || MAX_SHOW_DEFAULT;
  311   $result .= '&nbsp;Max. Shown:&nbsp'.
  312     CGI::popup_menu(-name=> 'max_shown',
  313                     -values=>[5,10,15,20,25,30,50,'All'],
  314                     -default=> $defaultMax);
  315 
  316   return($result);
  317 }
  318 
  319 
  320 ### The browsing panel has three versions
  321 #####  Version 1 is local problems
  322 sub browse_local_panel {
  323   my $self = shift;
  324   my $library_selected = shift;
  325   my $lib = shift || ''; $lib =~ s/^browse_//;
  326   my $name = ($lib eq '')? 'Local' : $problib{$lib};
  327 
  328   my $list_of_prob_dirs= get_problem_directories($self->r->ce,$lib);
  329   if(scalar(@$list_of_prob_dirs) == 0) {
  330     $library_selected = "Found no directories containing problems";
  331     unshift @{$list_of_prob_dirs}, $library_selected;
  332   } else {
  333     my $default_value = SELECT_LOCAL_STRING;
  334     if (not $library_selected or $library_selected eq $default_value) {
  335       unshift @{$list_of_prob_dirs},  $default_value;
  336       $library_selected = $default_value;
  337     }
  338   }
  339   debug("library is $lib and sets are $library_selected");
  340   my $view_problem_line = view_problems_line('view_local_set', 'View Problems', $self->r);
  341   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"}, "$name Problems: ",
  342     CGI::popup_menu(-name=> 'library_sets',
  343                     -values=>$list_of_prob_dirs,
  344                     -default=> $library_selected),
  345     CGI::br(),
  346     $view_problem_line,
  347   ));
  348 }
  349 
  350 #####  Version 2 is local homework sets
  351 sub browse_mysets_panel {
  352   my $self = shift;
  353   my $library_selected = shift;
  354   my $list_of_local_sets = shift;
  355   my $default_value = "Select a Homework Set";
  356 
  357   if(scalar(@$list_of_local_sets) == 0) {
  358     $list_of_local_sets = [NO_LOCAL_SET_STRING];
  359   } elsif (not $library_selected or $library_selected eq $default_value) {
  360     unshift @{$list_of_local_sets},  $default_value;
  361     $library_selected = $default_value;
  362   }
  363 
  364   my $view_problem_line = view_problems_line('view_mysets_set', 'View Problems', $self->r);
  365   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"}, "Browse from: ",
  366     CGI::popup_menu(-name=> 'library_sets',
  367                     -values=>$list_of_local_sets,
  368                     -default=> $library_selected),
  369     CGI::br(),
  370     $view_problem_line
  371   ));
  372 }
  373 
  374 #####  Version 3 is the problem library
  375 #
  376 # This comes in 3 forms, problem library version 1, and for version 2 there
  377 # is the basic, and the advanced interfaces.  This function checks what we are
  378 # supposed to do, or aborts if the problem library has not been installed.
  379 
  380 sub browse_library_panel {
  381   my $self=shift;
  382   my $r = $self->r;
  383   my $ce = $r->ce;
  384 
  385   # See if the problem library is installed
  386   my $libraryRoot = $r->{ce}->{problemLibrary}->{root};
  387 
  388   unless($libraryRoot) {
  389     print CGI::Tr(CGI::td(CGI::div({class=>'ResultsWithError', align=>"center"},
  390       "The problem library has not been installed.")));
  391     return;
  392   }
  393   # Test if the Library directory link exists.  If not, try to make it
  394   unless(-d "$ce->{courseDirs}->{templates}/Library") {
  395     unless(symlink($libraryRoot, "$ce->{courseDirs}->{templates}/Library")) {
  396       my $msg =  <<"HERE";
  397 You are missing the directory <code>templates/Library</code>, which is needed
  398 for the Problem Library to function.  It should be a link pointing to
  399 <code>$libraryRoot</code>, which you set in <code>conf/global.conf</code>.
  400 I tried to make the link for you, but that failed.  Check the permissions
  401 in your <code>templates</code> directory.
  402 HERE
  403       $self->addbadmessage($msg);
  404     }
  405   }
  406 
  407   # Now check what version we are supposed to use
  408   my $libraryVersion = $r->{ce}->{problemLibrary}->{version} || 1;
  409   if($libraryVersion == 1) {
  410     return $self->browse_library_panel1;
  411   } elsif($libraryVersion == 2) {
  412     return $self->browse_library_panel2 if($self->{library_basic}==1);
  413     return $self->browse_library_panel2adv;
  414   } else {
  415     print CGI::Tr(CGI::td(CGI::div({class=>'ResultsWithError', align=>"center"},
  416       "The problem library version is set to an illegal value.")));
  417     return;
  418   }
  419 }
  420 
  421 sub browse_library_panel1 {
  422   my $self = shift;
  423   my $r = $self->r;
  424   my $ce = $r->ce;
  425 
  426   my @chaps = WeBWorK::Utils::ListingDB::getAllChapters($r->{ce});
  427   unshift @chaps, LIB2_DATA->{dbchapter}{all};
  428   my $chapter_selected = $r->param('library_chapters') || LIB2_DATA->{dbchapter}->{all};
  429 
  430   my @sects=();
  431   if ($chapter_selected ne LIB2_DATA->{dbchapter}{all}) {
  432     @sects = WeBWorK::Utils::ListingDB::getAllSections($r->{ce}, $chapter_selected);
  433   }
  434 
  435   unshift @sects, ALL_SECTIONS;
  436   my $section_selected =  $r->param('library_sections') || LIB2_DATA->{dbsection}{all};
  437 
  438   my $view_problem_line = view_problems_line('lib_view', 'View Problems', $self->r);
  439 
  440   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"},
  441     CGI::start_table(),
  442       CGI::Tr(
  443         CGI::td(["Chapter:",
  444           CGI::popup_menu(-name=> 'library_chapters',
  445                           -values=>\@chaps,
  446                           -default=> $chapter_selected,
  447                           -onchange=>"submit();return true"
  448           ),
  449           CGI::submit(-name=>"lib_select_chapter", -value=>"Update Section List")])),
  450       CGI::Tr(
  451         CGI::td("Section:"),
  452         CGI::td({-colspan=>2},
  453           CGI::popup_menu(-name=> 'library_sections',
  454                           -values=>\@sects,
  455                           -default=> $section_selected
  456       ))),
  457 
  458       CGI::Tr(CGI::td({-colspan=>3}, $view_problem_line)),
  459       CGI::end_table(),
  460     ));
  461 }
  462 
  463 sub browse_library_panel2 {
  464   my $self = shift;
  465   my $r = $self->r;
  466   my $ce = $r->ce;
  467 
  468   my @subjs = WeBWorK::Utils::ListingDB::getAllDBsubjects($r);
  469   unshift @subjs, LIB2_DATA->{dbsubject}{all};
  470 
  471   my @chaps = WeBWorK::Utils::ListingDB::getAllDBchapters($r);
  472   unshift @chaps, LIB2_DATA->{dbchapter}{all};
  473 
  474   my @sects=();
  475   @sects = WeBWorK::Utils::ListingDB::getAllDBsections($r);
  476   unshift @sects, LIB2_DATA->{dbsection}{all};
  477 
  478   my $subject_selected = $r->param('library_subjects') || LIB2_DATA->{dbsubject}{all};
  479   my $chapter_selected = $r->param('library_chapters') || LIB2_DATA->{dbchapter}{all};
  480   my $section_selected =  $r->param('library_sections') || LIB2_DATA->{dbsection}{all};
  481 
  482   my $view_problem_line = view_problems_line('lib_view', 'View Problems', $self->r);
  483 
  484   my $count_line = WeBWorK::Utils::ListingDB::countDBListings($r);
  485   if($count_line==0) {
  486     $count_line = "There are no matching pg files";
  487   } else {
  488     $count_line = "There are $count_line matching WeBWorK problem files";
  489   }
  490 
  491   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"},
  492     CGI::hidden(-name=>"library_is_basic", -default=>[1],-override=>1),
  493     CGI::start_table({-width=>"100%"}),
  494     CGI::Tr(
  495       CGI::td(["Subject:",
  496         CGI::popup_menu(-name=> 'library_subjects',
  497                       -values=>\@subjs,
  498                       -default=> $subject_selected,
  499                        -onchange=>"submit();return true"
  500         )]),
  501       CGI::td({-colspan=>2, -align=>"right"},
  502         CGI::submit(-name=>"lib_select_subject", -value=>"Update Chapter/Section Lists"))
  503     ),
  504     CGI::Tr(
  505       CGI::td(["Chapter:",
  506         CGI::popup_menu(-name=> 'library_chapters',
  507                       -values=>\@chaps,
  508                       -default=> $chapter_selected,
  509                        -onchange=>"submit();return true"
  510         )]),
  511       CGI::td({-colspan=>2, -align=>"right"},
  512           CGI::submit(-name=>"library_advanced", -value=>"Advanced Search"))
  513     ),
  514     CGI::Tr(
  515       CGI::td(["Section:",
  516       CGI::popup_menu(-name=> 'library_sections',
  517                   -values=>\@sects,
  518                   -default=> $section_selected,
  519               -onchange=>"submit();return true"
  520         )]),
  521      ),
  522      CGI::Tr(CGI::td({-colspan=>3}, $view_problem_line)),
  523      CGI::Tr(CGI::td({-colspan=>3, -align=>"center"}, $count_line)),
  524      CGI::end_table(),
  525    ));
  526 
  527 }
  528 
  529 sub browse_library_panel2adv {
  530   my $self = shift;
  531   my $r = $self->r;
  532   my $ce = $r->ce;
  533   my $right_button_style = "width: 18ex";
  534 
  535   my @subjs = WeBWorK::Utils::ListingDB::getAllDBsubjects($r);
  536   if(! grep { $_ eq $r->param('library_subjects') } @subjs) {
  537     $r->param('library_subjects', '');
  538   }
  539   unshift @subjs, LIB2_DATA->{dbsubject}{all};
  540 
  541   my @chaps = WeBWorK::Utils::ListingDB::getAllDBchapters($r);
  542   if(! grep { $_ eq $r->param('library_chapters') } @chaps) {
  543     $r->param('library_chapters', '');
  544   }
  545   unshift @chaps, LIB2_DATA->{dbchapter}{all};
  546 
  547   my @sects = WeBWorK::Utils::ListingDB::getAllDBsections($r);
  548   if(! grep { $_ eq $r->param('library_sections') } @sects) {
  549     $r->param('library_sections', '');
  550   }
  551   unshift @sects, LIB2_DATA->{dbsection}{all};
  552 
  553   my $texts = WeBWorK::Utils::ListingDB::getDBTextbooks($r);
  554   my @textarray = map { $_->[0] }  @{$texts};
  555   my %textlabels = ();
  556   for my $ta (@{$texts}) {
  557     $textlabels{$ta->[0]} = $ta->[1]." by ".$ta->[2]." (edition ".$ta->[3].")";
  558   }
  559   if(! grep { $_ eq $r->param('library_textbook') } @textarray) {
  560     $r->param('library_textbook', '');
  561   }
  562   unshift @textarray, LIB2_DATA->{textbook}{all};
  563   my $atb = LIB2_DATA->{textbook}{all}; $textlabels{$atb} = LIB2_DATA->{textbook}{all};
  564 
  565   my $textchap_ref = WeBWorK::Utils::ListingDB::getDBTextbooks($r, 'textchapter');
  566   my @textchaps = map { $_->[0] } @{$textchap_ref};
  567   if(! grep { $_ eq $r->param('library_textchapter') } @textchaps) {
  568     $r->param('library_textchapter', '');
  569   }
  570   unshift @textchaps, LIB2_DATA->{textchapter}{all};
  571 
  572   my $textsec_ref = WeBWorK::Utils::ListingDB::getDBTextbooks($r, 'textsection');
  573   my @textsecs = map { $_->[0] } @{$textsec_ref};
  574   if(! grep { $_ eq $r->param('library_textsection') } @textsecs) {
  575     $r->param('library_textsection', '');
  576   }
  577   unshift @textsecs, LIB2_DATA->{textsection}{all};
  578 
  579   my %selected = ();
  580   for my $j (qw( dbsection dbchapter dbsubject textbook textchapter textsection )) {
  581     $selected{$j} = $r->param(LIB2_DATA->{$j}{name}) || LIB2_DATA->{$j}{all};
  582   }
  583 
  584   my $text_popup = CGI::popup_menu(-name => 'library_textbook',
  585                    -values =>\@textarray,
  586                    -labels => \%textlabels,
  587                    -default=>$selected{textbook},
  588                    -onchange=>"submit();return true");
  589 
  590 
  591   my $library_keywords = $r->param('library_keywords') || '';
  592 
  593   my $view_problem_line = view_problems_line('lib_view', 'View Problems', $self->r);
  594 
  595   my $count_line = WeBWorK::Utils::ListingDB::countDBListings($r);
  596   if($count_line==0) {
  597     $count_line = "There are no matching pg files";
  598   } else {
  599     $count_line = "There are $count_line matching WeBWorK problem files";
  600   }
  601 
  602   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"},
  603     CGI::hidden(-name=>"library_is_basic", -default=>[2],-override=>1),
  604     CGI::start_table({-width=>"100%"}),
  605     # Html done by hand since it is temporary
  606     CGI::Tr(CGI::td({-colspan=>4, -align=>"center"}, 'All Selected Constraints Joined by "And"')),
  607     CGI::Tr(
  608       CGI::td(["Subject:",
  609         CGI::popup_menu(-name=> 'library_subjects',
  610                       -values=>\@subjs,
  611                       -default=> $selected{dbsubject},
  612                        -onchange=>"submit();return true"
  613         )]),
  614       CGI::td({-colspan=>2, -align=>"right"},
  615         CGI::submit(-name=>"lib_select_subject", -value=>"Update Menus",
  616           -style=> $right_button_style))),
  617     CGI::Tr(
  618       CGI::td(["Chapter:",
  619         CGI::popup_menu(-name=> 'library_chapters',
  620                       -values=>\@chaps,
  621                       -default=> $selected{dbchapter},
  622                        -onchange=>"submit();return true"
  623         )]),
  624       CGI::td({-colspan=>2, -align=>"right"},
  625           CGI::submit(-name=>"library_reset", -value=>"Reset",
  626           -style=>$right_button_style))
  627     ),
  628     CGI::Tr(
  629       CGI::td(["Section:",
  630       CGI::popup_menu(-name=> 'library_sections',
  631                   -values=>\@sects,
  632                   -default=> $selected{dbsection},
  633               -onchange=>"submit();return true"
  634         )]),
  635       CGI::td({-colspan=>2, -align=>"right"},
  636           CGI::submit(-name=>"library_basic", -value=>"Basic Search",
  637           -style=>$right_button_style))
  638      ),
  639      CGI::Tr(
  640       CGI::td(["Textbook:", $text_popup]),
  641      ),
  642      CGI::Tr(
  643       CGI::td(["Text chapter:",
  644       CGI::popup_menu(-name=> 'library_textchapter',
  645                   -values=>\@textchaps,
  646                   -default=> $selected{textchapter},
  647               -onchange=>"submit();return true"
  648         )]),
  649      ),
  650      CGI::Tr(
  651       CGI::td(["Text section:",
  652       CGI::popup_menu(-name=> 'library_textsection',
  653                   -values=>\@textsecs,
  654                   -default=> $selected{textsection},
  655               -onchange=>"submit();return true"
  656         )]),
  657      ),
  658      CGI::Tr(CGI::td("Keywords:"),CGI::td({-colspan=>2},
  659        CGI::textfield(-name=>"library_keywords",
  660               -default=>$library_keywords,
  661               -override=>1,
  662               -size=>40))),
  663      CGI::Tr(CGI::td({-colspan=>3}, $view_problem_line)),
  664      CGI::Tr(CGI::td({-colspan=>3, -align=>"center"}, $count_line)),
  665      CGI::end_table(),
  666    ));
  667 
  668 }
  669 
  670 
  671 #####  Version 4 is the set definition file panel
  672 
  673 sub browse_setdef_panel {
  674   my $self = shift;
  675   my $r = $self->r;
  676   my $ce = $r->ce;
  677   my $library_selected = shift;
  678   my $default_value = "Select a Set Definition File";
  679   # in the following line, the parens after sort are important. if they are
  680   # omitted, sort will interpret get_set_defs as the name of the comparison
  681   # function, and ($ce->{courseDirs}{templates}) as a single element list to
  682   # be sorted. *barf*
  683   my @list_of_set_defs = sort(get_set_defs($ce->{courseDirs}{templates}));
  684   if(scalar(@list_of_set_defs) == 0) {
  685     @list_of_set_defs = (NO_LOCAL_SET_STRING);
  686   } elsif (not $library_selected or $library_selected eq $default_value) {
  687     unshift @list_of_set_defs, $default_value;
  688     $library_selected = $default_value;
  689   }
  690   my $view_problem_line = view_problems_line('view_setdef_set', 'View Problems', $self->r);
  691   my $popupetc = CGI::popup_menu(-name=> 'library_sets',
  692                                 -values=>\@list_of_set_defs,
  693                                 -default=> $library_selected).
  694     CGI::br().  $view_problem_line;
  695   if($list_of_set_defs[0] eq NO_LOCAL_SET_STRING) {
  696     $popupetc = "there are no set definition files in this course to look at."
  697   }
  698   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"}, "Browse from: ",
  699     $popupetc
  700   ));
  701 }
  702 
  703 sub make_top_row {
  704   my $self = shift;
  705   my $r = $self->r;
  706   my $ce = $r->ce;
  707   my %data = @_;
  708 
  709   my $list_of_local_sets = $data{all_db_sets};
  710   my $have_local_sets = scalar(@$list_of_local_sets);
  711   my $browse_which = $data{browse_which};
  712   my $library_selected = $self->{current_library_set};
  713   my $set_selected = $r->param('local_sets');
  714   my ($dis1, $dis2, $dis3, $dis4) = ("","","", "");
  715   $dis1 =  '-disabled' if($browse_which eq 'browse_library');
  716   $dis2 =  '-disabled' if($browse_which eq 'browse_local');
  717   $dis3 =  '-disabled' if($browse_which eq 'browse_mysets');
  718   $dis4 =  '-disabled' if($browse_which eq 'browse_setdefs');
  719 
  720   ##  Make buttons for additional problem libraries
  721   my $libs = '';
  722   foreach my $lib (sort(keys(%problib))) {
  723     $libs .= ' '. CGI::submit(-name=>"browse_$lib", -value=>$problib{$lib},
  724                                  ($browse_which eq "browse_$lib")? '-disabled': '')
  725       if (-d "$ce->{courseDirs}{templates}/$lib");
  726   }
  727   $libs = CGI::br()."or Problems from".$libs if $libs ne '';
  728 
  729   my $these_widths = "width: 23ex";
  730 
  731   if($have_local_sets ==0) {
  732     $list_of_local_sets = [NO_LOCAL_SET_STRING];
  733   } elsif (not defined($set_selected) or $set_selected eq ""
  734     or $set_selected eq SELECT_SET_STRING) {
  735     unshift @{$list_of_local_sets}, SELECT_SET_STRING;
  736     $set_selected = SELECT_SET_STRING;
  737   }
  738   my $myjs = 'document.mainform.selfassign.value=confirm("Should I assign the new set to you now?\nUse OK for yes and Cancel for no.");true;';
  739 
  740   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"left"}, "Add problems to ",
  741     CGI::b("Target Set: "),
  742     CGI::popup_menu(-name=> 'local_sets',
  743             -values=>$list_of_local_sets,
  744             -default=> $set_selected,
  745             -override=>1),
  746     CGI::submit(-name=>"edit_local", -value=>"Edit Target Set"),
  747     CGI::hidden(-name=>"selfassign", -default=>[0],-override=>1).
  748     CGI::br(),
  749     CGI::br(),
  750     CGI::submit(-name=>"new_local_set", -value=>"Create a New Set in This Course:",
  751     -onclick=>$myjs
  752     ),
  753     "  ",
  754     CGI::textfield(-name=>"new_set_name",
  755              -default=>"Name for new set here",
  756              -override=>1, -size=>30),
  757   ));
  758 
  759   print CGI::Tr(CGI::td({-bgcolor=>"black"}));
  760 
  761   # Tidy this list up since it is used in two different places
  762   if ($list_of_local_sets->[0] eq SELECT_SET_STRING) {
  763     shift @{$list_of_local_sets};
  764   }
  765 
  766   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"center"},
  767     "Browse ",
  768     CGI::submit(-name=>"browse_library", -value=>"Problem Library", -style=>$these_widths, $dis1),
  769     CGI::submit(-name=>"browse_local", -value=>"Local Problems", -style=>$these_widths, $dis2),
  770     CGI::submit(-name=>"browse_mysets", -value=>"From This Course", -style=>$these_widths, $dis3),
  771     CGI::submit(-name=>"browse_setdefs", -value=>"Set Definition Files", -style=>$these_widths, $dis4),
  772     $libs,
  773   ));
  774 
  775   #print CGI::Tr(CGI::td({-bgcolor=>"black"}));
  776   print CGI::hr();
  777 
  778   if ($browse_which eq 'browse_local') {
  779     $self->browse_local_panel($library_selected);
  780   } elsif ($browse_which eq 'browse_mysets') {
  781     $self->browse_mysets_panel($library_selected, $list_of_local_sets);
  782   } elsif ($browse_which eq 'browse_library') {
  783     $self->browse_library_panel();
  784   } elsif ($browse_which eq 'browse_setdefs') {
  785     $self->browse_setdef_panel($library_selected);
  786   } else { ## handle other problem libraries
  787     $self->browse_local_panel($library_selected,$browse_which);
  788   }
  789 
  790   print CGI::Tr(CGI::td({-bgcolor=>"black"}));
  791 
  792   print CGI::Tr(CGI::td({-class=>"InfoPanel", -align=>"center"},
  793     CGI::start_table({-border=>"0"}),
  794     CGI::Tr( CGI::td({ -align=>"center"},
  795       CGI::submit(-name=>"select_all", -style=>$these_widths,
  796                   -value=>"Mark All For Adding"),
  797       CGI::submit(-name=>"select_none", -style=>$these_widths,
  798                   -value=>"Clear All Marks"),
  799     )),
  800     CGI::Tr(CGI::td(
  801       CGI::submit(-name=>"update", -style=>$these_widths. "; font-weight:bold",
  802                   -value=>"Update Set"),
  803     CGI::submit(-name=>"rerandomize",
  804                 -style=>$these_widths,
  805                 -value=>"Rerandomize"),
  806     CGI::submit(-name=>"cleardisplay",
  807                 -style=>$these_widths,
  808                 -value=>"Clear Problem Display")
  809   )),
  810   CGI::end_table()));
  811 }
  812 
  813 sub make_data_row {
  814   my $self = shift;
  815   my $sourceFileName = shift;
  816   my $pg = shift;
  817   my $cnt = shift;
  818   my $mark = shift || 0;
  819 
  820   $sourceFileName =~ s|^./||; # clean up top ugliness
  821 
  822   my $urlpath = $self->r->urlpath;
  823   my $problem_output = $pg->{flags}->{error_flag} ?
  824     CGI::div({class=>"ResultsWithError"}, CGI::em("This problem produced an error"))
  825     : CGI::div({class=>"RenderSolo"}, $pg->{body_text});
  826   $problem_output .= $pg->{flags}->{comment} if($pg->{flags}->{comment});
  827 
  828 
  829   #if($self->{r}->param('browse_which') ne 'browse_library') {
  830   my $problem_seed = $self->{r}->param('problem_seed') || 0;
  831   my $edit_link = CGI::a({href=>$self->systemLink(
  832      $urlpath->newFromModule("WeBWorK::ContentGenerator::Instructor::PGProblemEditor",
  833         courseID =>$urlpath->arg("courseID"),
  834         setID=>"Undefined_Set",
  835         problemID=>"1"),
  836       params=>{sourceFilePath => "$sourceFileName", problemSeed=> $problem_seed}
  837       ), target=>"WW_Editor"}, "Edit it" );
  838 
  839   my $displayMode = $self->r->param("mydisplayMode");
  840   $displayMode = $self->r->ce->{pg}->{options}->{displayMode}
  841     if not defined $displayMode or $displayMode eq "None";
  842   my $try_link = CGI::a({href=>$self->systemLink(
  843     $urlpath->newFromModule("WeBWorK::ContentGenerator::Problem",
  844       courseID =>$urlpath->arg("courseID"),
  845       setID=>"Undefined_Set",
  846       problemID=>"1"),
  847     params =>{
  848       effectiveUser => scalar($self->r->param('user')),
  849       editMode => "SetMaker",
  850       problemSeed=> $problem_seed,
  851       sourceFilePath => "$sourceFileName",
  852       displayMode => $displayMode,
  853     }
  854   ), target=>"WW_View"}, "Try it");
  855 
  856   my %add_box_data = ( -name=>"trial$cnt",-value=>1,-label=>"Add this problem to the target set on the next update");
  857   if($mark & SUCCESS) {
  858     $add_box_data{ -label } .= " (just added this problem)";
  859   } elsif($mark & ADDED) {
  860     $add_box_data{ -checked } = 1;
  861   }
  862 
  863   my $inSet = ($self->{isInSet}{$sourceFileName})?
  864       CGI::span({-style=>"float:right; text-align: right"},
  865         CGI::i(CGI::b("(This problem is in the target set)"))) : "";
  866 
  867   print CGI::Tr({-align=>"left"}, CGI::td(
  868     CGI::div({-style=>"background-color: #DDDDDD; margin: 0px auto"},
  869       CGI::span({-style=>"float:left ; text-align: left"},"File name: $sourceFileName "),
  870       CGI::span({-style=>"float:right ; text-align: right"}, $edit_link, " ", $try_link)
  871     ), CGI::br(),
  872     CGI::checkbox(-name=>"hideme$cnt",-value=>1,-label=>"Don't show this problem on the next update",-override=>1),
  873     CGI::br(),
  874     $inSet,
  875     CGI::checkbox((%add_box_data),-override=>1),
  876     CGI::hidden(-name=>"filetrial$cnt", -default=>[$sourceFileName],-override=>1).
  877     CGI::p($problem_output),
  878   ));
  879 }
  880 
  881 sub clear_default {
  882   my $r = shift;
  883   my $param = shift;
  884   my $default = shift;
  885   my $newvalue = $r->param($param) || '';
  886   $newvalue = '' if($newvalue eq $default);
  887   $r->param($param, $newvalue);
  888 }
  889 
  890 sub pre_header_initialize {
  891   my ($self) = @_;
  892   my $r = $self->r;
  893   ## For all cases, lets set some things
  894   $self->{error}=0;
  895   my $ce = $r->ce;
  896   my $db = $r->db;
  897   my $maxShown = $r->param('max_shown') || MAX_SHOW_DEFAULT;
  898   $maxShown = 10000000 if($maxShown eq 'All'); # let's hope there aren't more
  899   my $library_basic = $r->param('library_is_basic') || 1;
  900 
  901   ## Fix some parameters
  902   for my $key (keys(%{ LIB2_DATA() })) {
  903     clear_default($r, LIB2_DATA->{$key}->{name}, LIB2_DATA->{$key}->{all} );
  904   }
  905     ##  Grab library sets to display from parameters list.  We will modify this
  906     ##  as we go through the if/else tree
  907     $self->{current_library_set} =  $r->param('library_sets');
  908 
  909   ##  These directories will have individual buttons
  910   %problib = %{$ce->{courseFiles}{problibs}} if $ce->{courseFiles}{problibs};
  911 
  912   my $userName = $r->param('user');
  913   my $user = $db->getUser($userName); # checked
  914   die "record for user $userName (real user) does not exist."
  915     unless defined $user;
  916   my $authz = $r->authz;
  917   unless ($authz->hasPermissions($userName, "modify_problem_sets")) {
  918     return(""); # Error message already produced in the body
  919   }
  920 
  921   ## Now one action we have to deal with here
  922   if ($r->param('edit_local')) {
  923     my $urlpath = $r->urlpath;
  924     my $db = $r->db;
  925     my $checkset = $db->getGlobalSet($r->param('local_sets'));
  926     if (not defined($checkset)) {
  927       $self->{error} = 1;
  928       $self->addbadmessage('You need to select a "Target Set" before you can edit it.');
  929     } else {
  930       my $page = $urlpath->newFromModule('WeBWorK::ContentGenerator::Instructor::ProblemSetDetail', setID=>$r->param('local_sets'), courseID=>$urlpath->arg("courseID"));
  931       my $url = $self->systemLink($page);
  932       $self->reply_with_redirect($url);
  933     }
  934   }
  935 
  936   ## Next, lots of set up so that errors can be reported with message()
  937 
  938   ############# List of problems we have already printed
  939 
  940   $self->{past_problems} = get_past_problem_files($r);
  941   # if we don't end up reusing problems, this will be wiped out
  942   # if we do redisplay the same problems, we must adjust this accordingly
  943   my @past_marks = map {$_->[1]} @{$self->{past_problems}};
  944   my $none_shown = scalar(@{$self->{past_problems}})==0;
  945   my @pg_files=();
  946   my $use_previous_problems = 1;
  947   my $first_shown = $r->param('first_shown') || 0;
  948   my $last_shown = $r->param('last_shown');
  949   if (not defined($last_shown)) {
  950     $last_shown = -1;
  951   }
  952   my @all_past_list = (); # these are include requested, but not shown
  953   my $j = 0;
  954   while (defined($r->param("all_past_list$j"))) {
  955     push @all_past_list, $r->param("all_past_list$j");
  956     $j++;
  957   }
  958 
  959   ############# Default of which problem selector to display
  960 
  961   my $browse_which = $r->param('browse_which') || 'browse_local';
  962 
  963   my $problem_seed = $r->param('problem_seed') || 0;
  964   $r->param('problem_seed', $problem_seed); # if it wasn't defined before
  965 
  966   ## check for problem lib buttons
  967   my $browse_lib = '';
  968   foreach my $lib (keys %problib) {
  969     if ($r->param("browse_$lib")) {
  970       $browse_lib = "browse_$lib";
  971       last;
  972     }
  973   }
  974 
  975   ########### Start the logic through if elsif elsif ...
  976     debug("browse_lib", $r->param("$browse_lib"));
  977     debug("browse_library", $r->param("browse_library"));
  978     debug("browse_mysets", $r->param("browse_mysets"));
  979     debug("browse_setdefs", $r->param("browse_setdefs"));
  980   ##### Asked to browse certain problems
  981   if ($browse_lib ne '') {
  982     $browse_which = $browse_lib;
  983     $self->{current_library_set} = "";
  984     $use_previous_problems = 0; @pg_files = (); ## clear old problems
  985   } elsif ($r->param('browse_library')) {
  986     $browse_which = 'browse_library';
  987     $self->{current_library_set} = "";
  988     $use_previous_problems = 0; @pg_files = (); ## clear old problems
  989   } elsif ($r->param('browse_local')) {
  990     $browse_which = 'browse_local';
  991     #$self->{current_library_set} = "";
  992     $use_previous_problems = 0; @pg_files = (); ## clear old problems
  993   } elsif ($r->param('browse_mysets')) {
  994     $browse_which = 'browse_mysets';
  995     $self->{current_library_set} = "";
  996     $use_previous_problems = 0; @pg_files = (); ## clear old problems
  997   } elsif ($r->param('browse_setdefs')) {
  998     $browse_which = 'browse_setdefs';
  999     $self->{current_library_set} = "";
 1000     $use_previous_problems = 0; @pg_files = (); ## clear old problems
 1001 
 1002     ##### Change the seed value
 1003 
 1004   } elsif ($r->param('rerandomize')) {
 1005     $problem_seed++;
 1006     $r->param('problem_seed', $problem_seed);
 1007     $self->addbadmessage('Changing the problem seed for display, but there are no problems showing.') if $none_shown;
 1008 
 1009     ##### Clear the display
 1010 
 1011   } elsif ($r->param('cleardisplay')) {
 1012     @pg_files = ();
 1013     $use_previous_problems=0;
 1014     $self->addbadmessage('The display was already cleared.') if $none_shown;
 1015 
 1016     ##### View problems selected from the local list
 1017 
 1018   } elsif ($r->param('view_local_set')) {
 1019 
 1020     my $set_to_display = $self->{current_library_set};
 1021     if (not defined($set_to_display) or $set_to_display eq SELECT_LOCAL_STRING or $set_to_display eq "Found no directories containing problems") {
 1022       $self->addbadmessage('You need to select a set to view.');
 1023     } else {
 1024       $set_to_display = '.' if $set_to_display eq MY_PROBLEMS;
 1025       $set_to_display = substr($browse_which,7) if $set_to_display eq MAIN_PROBLEMS;
 1026       @pg_files = list_pg_files($ce->{courseDirs}->{templates},
 1027         "$set_to_display");
 1028       $use_previous_problems=0;
 1029     }
 1030 
 1031     ##### View problems selected from the a set in this course
 1032 
 1033   } elsif ($r->param('view_mysets_set')) {
 1034 
 1035     my $set_to_display = $r->param('local_sets');
 1036     debug("set_to_display is $set_to_display");
 1037     if (not defined($set_to_display)
 1038         or $set_to_display eq "Select a Homework Set"
 1039         or $set_to_display eq NO_LOCAL_SET_STRING) {
 1040       $self->addbadmessage("You need to select a set from this course to view.");
 1041     } else {
 1042       my @problemList = $db->listGlobalProblems($set_to_display);
 1043       my $problem;
 1044       @pg_files=();
 1045       for $problem (@problemList) {
 1046         my $problemRecord = $db->getGlobalProblem($set_to_display, $problem); # checked
 1047         die "global $problem for set $set_to_display not found." unless
 1048           $problemRecord;
 1049         push @pg_files, $problemRecord->source_file;
 1050 
 1051       }
 1052       @pg_files = sortByName(undef,@pg_files);
 1053       $use_previous_problems=0;
 1054     }
 1055 
 1056     ##### View from the library database
 1057 
 1058   } elsif ($r->param('lib_view')) {
 1059 
 1060     @pg_files=();
 1061     my @dbsearch = WeBWorK::Utils::ListingDB::getSectionListings($r);
 1062     my ($result, $tolibpath);
 1063     for $result (@dbsearch) {
 1064       $tolibpath = "Library/$result->{path}/$result->{filename}";
 1065 
 1066       ## Too clunky!!!!
 1067       push @pg_files, $tolibpath;
 1068     }
 1069     $use_previous_problems=0;
 1070 
 1071     ##### View a set from a set*.def
 1072 
 1073   } elsif ($r->param('view_setdef_set')) {
 1074 
 1075     my $set_to_display = $r->param('local_sets');
 1076     debug("set_to_display is $set_to_display");
 1077     if (not defined($set_to_display)
 1078         or $set_to_display eq "Select a Set Definition File"
 1079         or $set_to_display eq NO_LOCAL_SET_STRING) {
 1080       $self->addbadmessage("You need to select a set definition file to view.");
 1081     } else {
 1082       @pg_files= $self->read_set_def($set_to_display);
 1083     }
 1084     $use_previous_problems=0;
 1085 
 1086     ##### Edit the current local homework set
 1087 
 1088   } elsif ($r->param('edit_local')) { ## Jump to set edit page
 1089 
 1090     ; # already handled
 1091 
 1092 
 1093     ##### Make a new local homework set
 1094 
 1095   } elsif ($r->param('new_local_set')) {
 1096     if ($r->param('new_set_name') !~ /^[\w .-]*$/) {
 1097       $self->addbadmessage("The name ".$r->param('new_set_name')." is not a valid set name.  Use only letters, digits, -, _, and .");
 1098     } else {
 1099       my $newSetName = $r->param('new_set_name');
 1100       # if we want to munge the input set name, do it here
 1101       $newSetName =~ s/\s/_/g;
 1102       debug("local_sets was ", $r->param('local_sets'));
 1103       $r->param('local_sets',$newSetName);  ## use of two parameter param
 1104       debug("new value of local_sets is ", $r->param('local_sets'));
 1105       my $newSetRecord   = $db->getGlobalSet($newSetName);
 1106       if (defined($newSetRecord)) {
 1107               $self->addbadmessage("The set name $newSetName is already in use.
 1108               Pick a different name if you would like to start a new set.");
 1109       } else {      # Do it!
 1110         $newSetRecord = $db->{set}->{record}->new();
 1111         $newSetRecord->set_id($newSetName);
 1112         $newSetRecord->set_header("");
 1113         $newSetRecord->hardcopy_header("");
 1114         $newSetRecord->open_date(time()+60*60*24*7); # in one week
 1115         $newSetRecord->due_date(time()+60*60*24*7*2); # in two weeks
 1116         $newSetRecord->answer_date(time()+60*60*24*7*3); # in three weeks
 1117         eval {$db->addGlobalSet($newSetRecord)};
 1118         if ($@) {
 1119           $self->addbadmessage("Problem creating set $newSetName<br> $@");
 1120         } else {
 1121           $self->addgoodmessage("Set $newSetName has been created.");
 1122           my $selfassign = $r->param('selfassign') || "";
 1123           $selfassign = "" if($selfassign =~ /false/i); # deal with javascript false
 1124           if($selfassign) {
 1125             $self->assignSetToUser($userName, $newSetRecord);
 1126             $self->addgoodmessage("Set $newSetName was assigned to $userName.");
 1127           }
 1128         }
 1129       }
 1130     }
 1131 
 1132     ##### Add selected problems to the current local set
 1133 
 1134   } elsif ($r->param('update')) {
 1135     ## first handle problems to be added before we hide them
 1136     my($localSet, @selected);
 1137 
 1138     @pg_files = grep {($_->[1] & ADDED) != 0 } @{$self->{past_problems}};
 1139     @selected = map {$_->[0]} @pg_files;
 1140 
 1141     my @action_files = grep {$_->[1] > 0 } @{$self->{past_problems}};
 1142     # There are now good reasons to do an update without selecting anything.
 1143     #if(scalar(@action_files) == 0) {
 1144     #  $self->addbadmessage('Update requested, but no problems were marked.');
 1145     #}
 1146 
 1147     if (scalar(@selected)>0) {  # if some are to be added, they need a place to go
 1148       $localSet = $r->param('local_sets');
 1149       if (not defined($localSet) or
 1150           $localSet eq SELECT_SET_STRING or
 1151                 $localSet eq NO_LOCAL_SET_STRING) {
 1152         $self->addbadmessage('You are trying to add problems to something,
 1153         but you did not select a "Target Set" name as a target.');
 1154       } else {
 1155         my $newSetRecord  = $db->getGlobalSet($localSet);
 1156         if (not defined($newSetRecord)) {
 1157           $self->addbadmessage("You are trying to add problems to $localSet,
 1158           but that set does not seem to exist!  I bet you used your \"Back\" button.");
 1159         } else {
 1160           my $addcount = add_selected($self, $db, $localSet);
 1161           if($addcount > 0) {
 1162             $self->addgoodmessage("Added $addcount problem".(($addcount>1)?'s':'').
 1163               " to $localSet.");
 1164           }
 1165         }
 1166       }
 1167     }
 1168     ## now handle problems to be hidden
 1169 
 1170     ## only keep the ones which are not hidden
 1171     @pg_files = grep {($_->[1] & HIDDEN) ==0 } @{$self->{past_problems}};
 1172     @past_marks = map {$_->[1]} @pg_files;
 1173     @pg_files = map {$_->[0]} @pg_files;
 1174     @all_past_list = (@all_past_list[0..($first_shown-1)],
 1175           @pg_files,
 1176           @all_past_list[($last_shown+1)..(scalar(@all_past_list)-1)]);
 1177     $last_shown = $first_shown+$maxShown -1; debug("last_shown 3: ", $last_shown);
 1178     $last_shown = (scalar(@all_past_list)-1) if($last_shown>=scalar(@all_past_list)); debug("last_shown 4: ", $last_shown);
 1179 
 1180   } elsif ($r->param('next_page')) {
 1181     $first_shown = $last_shown+1;
 1182     $last_shown = $first_shown+$maxShown-1; debug("last_shown 5: ", $last_shown);
 1183     $last_shown = (scalar(@all_past_list)-1) if($last_shown>=scalar(@all_past_list)); debug("last_shown 6: ", $last_shown);
 1184     @past_marks = ();
 1185   } elsif ($r->param('prev_page')) {
 1186     $last_shown = $first_shown-1;
 1187     $first_shown = $last_shown - $maxShown+1;
 1188 
 1189     $first_shown = 0 if($first_shown<0);
 1190     @past_marks = ();
 1191 
 1192   } elsif ($r->param('select_all')) {
 1193     @past_marks = map {1} @past_marks;
 1194   } elsif ($r->param('library_basic')) {
 1195     $library_basic = 1;
 1196     for my $jj (qw(textchapter textsection textbook)) {
 1197       $r->param('library_'.$jj,'');
 1198     }
 1199   } elsif ($r->param('library_advanced')) {
 1200     $library_basic = 2;
 1201   } elsif ($r->param('library_reset')) {
 1202     for my $jj (qw(chapters sections subjects textbook keywords)) {
 1203       $r->param('library_'.$jj,'');
 1204     }
 1205   } elsif ($r->param('select_none')) {
 1206     @past_marks = ();
 1207 
 1208     ##### No action requested, probably our first time here
 1209 
 1210   } else {
 1211     #my $c = $r->connection;
 1212     #print "Debug info: ". $r->get_remote_host ."<p>".  $c->remote_ip ;
 1213     ;
 1214   }       ##### end of the if elsif ...
 1215 
 1216 
 1217   ############# List of local sets
 1218 
 1219   my @all_db_sets = $db->listGlobalSets;
 1220   @all_db_sets = sortByName(undef, @all_db_sets);
 1221 
 1222   if ($use_previous_problems) {
 1223     @pg_files = @all_past_list;
 1224   } else {
 1225     $first_shown = 0;
 1226     $last_shown = scalar(@pg_files)<$maxShown ? scalar(@pg_files) : $maxShown;
 1227     $last_shown--;    # to make it an array index
 1228     @past_marks = ();
 1229   }
 1230   ############# Now store data in self for retreival by body
 1231   $self->{first_shown} = $first_shown;
 1232   $self->{last_shown} = $last_shown;
 1233   $self->{browse_which} = $browse_which;
 1234   $self->{problem_seed} = $problem_seed;
 1235   $self->{pg_files} = \@pg_files;
 1236   $self->{past_marks} = \@past_marks;
 1237   $self->{all_db_sets} = \@all_db_sets;
 1238   $self->{library_basic} = $library_basic;
 1239   debug("past_marks is ", join(" ", @{$self->{past_marks}}));
 1240 }
 1241 
 1242 
 1243 sub title {
 1244   return "Library Browser";
 1245 }
 1246 
 1247 # hide view options panel since it distracts from SetMaker's built-in view options
 1248 sub options {
 1249   return "";
 1250 }
 1251 
 1252 sub body {
 1253   my ($self) = @_;
 1254 
 1255   my $r = $self->r;
 1256   my $ce = $r->ce;    # course environment
 1257   my $db = $r->db;    # database
 1258   my $j;      # garden variety counter
 1259 
 1260   my $userName = $r->param('user');
 1261 
 1262   my $user = $db->getUser($userName); # checked
 1263   die "record for user $userName (real user) does not exist."
 1264     unless defined $user;
 1265 
 1266   ### Check that this is a professor
 1267   my $authz = $r->authz;
 1268   unless ($authz->hasPermissions($userName, "modify_problem_sets")) {
 1269     print "User $userName returned " .
 1270       $authz->hasPermissions($user, "modify_problem_sets") .
 1271   " for permission";
 1272     return(CGI::div({class=>'ResultsWithError'},
 1273     CGI::em("You are not authorized to access the Instructor tools.")));
 1274   }
 1275 
 1276   ##########  Extract information computed in pre_header_initialize
 1277 
 1278   my $first_shown = $self->{first_shown};
 1279   my $last_shown = $self->{last_shown};
 1280   my $browse_which = $self->{browse_which};
 1281   my $problem_seed = $self->{problem_seed};
 1282   my @pg_files = @{$self->{pg_files}};
 1283   my @all_db_sets = @{$self->{all_db_sets}};
 1284 
 1285   my @pg_html=($last_shown>=$first_shown) ?
 1286     renderProblems(r=> $r,
 1287                    user => $user,
 1288                    problem_list => [@pg_files[$first_shown..$last_shown]],
 1289                    displayMode => $r->param('mydisplayMode')) : ();
 1290 
 1291   my %isInSet;
 1292   my $setName = $r->param("local_sets");
 1293   if ($setName) {
 1294     foreach my $problem ($db->listGlobalProblems($setName)) {
 1295       my $problemRecord = $db->getGlobalProblem($setName, $problem);
 1296       $isInSet{$problemRecord->source_file} = 1;
 1297     }
 1298   }
 1299   $self->{isInSet} = \%isInSet;
 1300 
 1301   ##########  Top part
 1302   print CGI::startform({-method=>"POST", -action=>$r->uri, -name=>'mainform'}),
 1303     $self->hidden_authen_fields,
 1304       '<div align="center">',
 1305   CGI::start_table({-border=>2});
 1306   $self->make_top_row('all_db_sets'=>\@all_db_sets,
 1307          'browse_which'=> $browse_which);
 1308   print CGI::hidden(-name=>'browse_which', -value=>[$browse_which],-override=>1),
 1309     CGI::hidden(-name=>'problem_seed', -value=>[$problem_seed], -override=>1);
 1310   for ($j = 0 ; $j < scalar(@pg_files) ; $j++) {
 1311     print CGI::hidden(-name=>"all_past_list$j", -value=>$pg_files[$j],-override=>1);
 1312   }
 1313 
 1314   print CGI::hidden(-name=>'first_shown', -value=>[$first_shown],-override=>1);
 1315 
 1316   print CGI::hidden(-name=>'last_shown', -value=>[$last_shown], -override=>1);
 1317 
 1318 
 1319   ########## Now print problems
 1320   my $jj;
 1321   for ($jj=0; $jj<scalar(@pg_html); $jj++) {
 1322     $pg_files[$jj] =~ s|^$ce->{courseDirs}->{templates}/?||;
 1323     $self->make_data_row($pg_files[$jj+$first_shown], $pg_html[$jj], $jj+1, $self->{past_marks}->[$jj]);
 1324     #$self->make_data_row($pg_files[$jj+$first_shown], $pg_html[$jj], $jj+1, $self->{past_marks}->[$jj+$first_shown]); #MEG
 1325   }
 1326 
 1327   ########## Finish things off
 1328   print CGI::end_table();
 1329   print '</div>';
 1330   #  if($first_shown>0 or (1+$last_shown)<scalar(@pg_files)) {
 1331   my ($next_button, $prev_button) = ("", "");
 1332   if ($first_shown > 0) {
 1333     $prev_button = CGI::submit(-name=>"prev_page", -style=>"width:15ex",
 1334              -value=>"Previous page");
 1335   }
 1336   if ((1+$last_shown)<scalar(@pg_files)) {
 1337     $next_button = CGI::submit(-name=>"next_page", -style=>"width:15ex",
 1338              -value=>"Next page");
 1339   }
 1340   if (scalar(@pg_files)>0) {
 1341     print CGI::p(($first_shown+1)."-".($last_shown+1)." of ".scalar(@pg_files).
 1342      " shown.", $prev_button, " ", $next_button);
 1343   }
 1344   #  }
 1345   print CGI::endform(), "\n";
 1346 
 1347   return "";
 1348 }
 1349 
 1350 =head1 AUTHOR
 1351 
 1352 Written by John Jones, jj (at) asu.edu.
 1353 
 1354 =cut
 1355 
 1356 1;

aubreyja at gmail dot com
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