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Diff for /loncom/lonnet/perl/lonnet.pm between versions 1.1192 and 1.1195

version 1.1192, 2012/10/29 17:39:02 version 1.1195, 2012/11/09 17:27:18
Line 2645  sub allowuploaded { Line 2645  sub allowuploaded {
     &Apache::lonnet::appenv(\%httpref);      &Apache::lonnet::appenv(\%httpref);
 }  }
   
   #
   # Determine if the current user should be able to edit a particular resource,
   # when viewing in course context.
   # (a) When viewing resource used to determine if "Edit" item is included in 
   #     Functions.
   # (b) When displaying folder contents in course editor, used to determine if
   #     "Edit" link will be displayed alongside resource.
   #
   #  input: 3 args -- filename (decluttered), course number and course domain.
   #  output: array of four scalars -- 
   #          $cfile -- url for file editing if editable on current server
   #          $home -- homeserver of resource (i.e., for author if published,
   #                                           or course if uploaded.).
   #          $switchserver --  1 if server switch will be needed.
   #          $uploaded -- 1 if resource is a file uploaded to a course.
   #
   
   sub can_edit_resource {
       my ($file,$cnum,$cdom,$resurl,$symb,$group) = @_;
       my ($cfile,$home,$switchserver,$forceedit,$forceview,$uploaded,$incourse);
   #
   # For aboutme pages user can only edit his/her own.
   #
       if ($resurl =~ m{^/adm/($match_domain)/($match_username)/aboutme$}) {
           my ($sdom,$sname) = ($1,$2);
           if (($sdom eq $env{'user.domain'}) && ($sname eq $env{'user.name'})) {
               $home = $env{'user.home'};
               $cfile = $resurl;
               if ($env{'form.forceedit'}) {
                   $forceview = 1;
               } else {
                   $forceedit = 1;
               }
               return ($cfile,$home,$switchserver,$forceedit,$forceview);
           } else {
               return;
           }
       }
   
       if ($env{'request.course.id'}) {
           my $crsedit = &Apache::lonnet::allowed('mdc',$env{'request.course.id'});
           if ($group ne '') {
   # if this is a group homepage or group bulletin board, check group privs
               my $allowed = 0;
               if ($resurl =~ m{^/adm/$cdom/$cnum/$group/smppg$}) {
                   if ((&Apache::lonnet::allowed('mdg',$env{'request.course.id'}.
                               ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) ||
                           (&allowed('mgh',$env{'request.course.id'}.'/'.$group)) || $crsedit) {
                       $allowed = 1;
                   }
               } elsif ($resurl =~ m{^/adm/$cdom/$cnum/\d+/bulletinboard$}) {
                   unless ((&allowed(&Apache::lonnet::allowed('mdg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) ||
                           (&allowed('cgb',$env{'request.course.id'}.$group)) || $crsedit) {
                       $allowed = 1;
                   }
               }
               if ($allowed) {
                   $home=&homeserver($cnum,$cdom);
                   if ($env{'form.forceedit'}) {
                       $forceview = 1;
                   } else {
                       $forceedit = 1;
                   }
                   $cfile = $resurl;
               } else {
                   return;
               }
           } else {
   #
   # No edit allowed where CC has switched to student role.
   #
               unless ($crsedit) {
                   return;
               }
           }
       }
   
       if ($file ne '') {
           if (($cnum =~ /$match_courseid/) && ($cdom =~ /$match_domain/)) {
               if (&is_course_upload($file,$cnum,$cdom)) {
                   $uploaded = 1;
                   $incourse = 1;
                   if ($file =~/\.(htm|html|css|js|txt)$/) {
                       $cfile = &hreflocation('',$file);
                       $forceedit = 1;
                   }
               } elsif ($resurl =~ m{^/public/$cdom/$cnum/syllabus}) {
                   $incourse = 1;
                   if ($env{'form.forceedit'}) {
                       $forceview = 1;
                   } else {
                       $forceedit = 1;
                   }
                   $cfile = $resurl;
               } elsif (($resurl ne '') && (&is_on_map($resurl))) { 
                   if ($resurl =~ m{^/adm/$match_domain/$match_username/\d+/smppg|bulletinboard$}) {
                       $incourse = 1;
                       if ($env{'form.forceedit'}) {
                           $forceview = 1;
                       } else {
                           $forceedit = 1;
                       }
                       $cfile = $resurl;
                   } elsif (($resurl eq '/res/lib/templates/simpleproblem.problem')) {
                       $incourse = 1;
                       $cfile = $resurl.'/smpedit';
                   } elsif ($resurl =~ /ext/) {
                       $incourse = 1;
                       # is external
                   }
               } elsif ($resurl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
                   my $template = '/res/lib/templates/simpleproblem.problem';
                   if (&is_on_map($template)) { 
                       $incourse = 1;
                       $forceview = 1;
                       $cfile = $template;
                   }
               }
           }
           if ($uploaded || $incourse) {
               $home=&homeserver($cnum,$cdom);
           } else {
               $file=~s{^(priv/$match_domain/$match_username)}{/$1};
               $file=~s{^($match_domain/$match_username)}{/priv/$1};
               # Check that the user has permission to edit this resource
               my $setpriv = 1;
               my ($cfuname,$cfudom)=&constructaccess($file,$setpriv);
               if (defined($cfudom)) {
                   $home=&homeserver($cfuname,$cfudom);
                   $cfile=$file;
               }
           }
           if (($cfile ne '') && (!$incourse || $uploaded) && 
               (($home ne '') && ($home ne 'no_host'))) {
               my @ids=&current_machine_ids();
               unless (grep(/^\Q$home\E$/,@ids)) {
                   $switchserver=1;
               }
           }
       }
       return ($cfile,$home,$switchserver,$forceedit,$forceview);
   }
   
   sub is_course_upload {
       my ($file,$cnum,$cdom) = @_;
       my $uploadpath = &LONCAPA::propath($cdom,$cnum);
       $uploadpath =~ s{^\/}{};
       if (($file =~ m{^\Q$uploadpath\E/userfiles/docs/}) ||
           ($file =~ m{^userfiles/\Q$cdom\E/\Q$cnum\E/docs/})) {
           return 1;
       }
       return;
   }
   
   sub in_course {
       my ($udom,$uname,$cdom,$cnum,$type,$hideprivileged) = @_;
       if ($hideprivileged) {
           my $skipuser;
           if (&privileged($uname,$udom)) {
               $skipuser = 1;
               my %coursehash = &coursedescription($cdom.'_'.$cnum);
               if ($coursehash{'nothideprivileged'}) {
                   foreach my $item (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
                       my $user;
                       if ($item =~ /:/) {
                           $user = $item;
                       } else {
                           $user = join(':',split(/[\@]/,$item));
                       }
                       if ($user eq $uname.':'.$udom) {
                           undef($skipuser);
                           last;
                       }
                   }
               }
               if ($skipuser) {
                   return 0;
               }
           }
       }
       $type ||= 'any';
       if (!defined($cdom) || !defined($cnum)) {
           my $cid  = $env{'request.course.id'};
           $cdom = $env{'course.'.$cid.'.domain'};
           $cnum = $env{'course.'.$cid.'.num'};
       }
       my $typesref;
       if (($type eq 'any') || ($type eq 'all')) {
           $typesref = ['active','previous','future'];
       } elsif ($type eq 'previous' || $type eq 'future') {
           $typesref = [$type];
       }
       my %roles = &get_my_roles($uname,$udom,'userroles',
                                 $typesref,undef,[$cdom]);
       my ($tmp) = keys(%roles);
       return 0 if ($tmp =~ /^(con_lost|error|no_such_host)/i);
       my @course_roles = grep(/^\Q$cnum\E:\Q$cdom\E:/, keys(%roles));
       if (@course_roles > 0) {
           return 1;
       }
       return 0;
   }
   
 # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course  # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
 # input: action, courseID, current domain, intended  # input: action, courseID, current domain, intended
 #        path to file, source of file, instruction to parse file for objects,  #        path to file, source of file, instruction to parse file for objects,
Line 12054  of role statuses (active, future or prev Line 12257  of role statuses (active, future or prev
 to restrict the list of roles reported. If no array ref is   to restrict the list of roles reported. If no array ref is 
 provided for types, will default to return only active roles.  provided for types, will default to return only active roles.
   
   =item *
   
   in_course($udom,$uname,$cdom,$cnum,$type,$hideprivileged) : determine if
   user: $uname:$udom has a role in the course: $cdom_$cnum. Additional
   optional arguments are: $type (if role checking is to be restricted to
   certain user status types -- previous (expired roles), active (currently
   available roles) or future (roles available in the future), and
   $hideprivileged -- if true will not report course roles for users who
   have active Domain Coordinator or Super User roles.
   
 =back  =back
   
 =head2 User Modification  =head2 User Modification
Line 12256  data base, returning a hash that is keye Line 12469  data base, returning a hash that is keye
 values that are the resource value.  I believe that the timestamps and  values that are the resource value.  I believe that the timestamps and
 versions are also returned.  versions are also returned.
   
   
 =back  =back
   
 =head2 Course Modification  =head2 Course Modification
Line 12417  expirespread($uname,$udom,$stype,$usymb) Line 12629  expirespread($uname,$udom,$stype,$usymb)
 devalidate($symb) : devalidate temporary spreadsheet calculations,  devalidate($symb) : devalidate temporary spreadsheet calculations,
 forcing spreadsheet to reevaluate the resource scores next time.  forcing spreadsheet to reevaluate the resource scores next time.
   
   =item * 
   
   can_edit_resource($file,$cnum,$cdom,$resurl,$symb,$group)
   
   Determine if the current user should be able to edit a particular resource,
   when viewing in course context.
   (a) When viewing resource used to determine if "Edit" item is included in
        Functions.
   (b) When displaying folder contents in course editor, used to determine if
       "Edit" link will be displayed alongside resource.
   
    input: 3 args -- filename (decluttered), course number and course domain.
    output: array of four scalars --
            $cfile -- url for file editing if editable on current server
            $home -- homeserver of resource (i.e., for author if published,
                                             or course if uploaded.).
            $switchserver --  1 if server switch will be needed.
            $uploaded -- 1 if resource is a file uploaded to a course.
   
   =item *
   
   is_course_upload($file,$cnum,$cdom)
   
   Used in course context to determine if current file was uploaded to 
   the course (i.e., would be found in /userfiles/docs on the course's 
   homeserver.
   
     input: 3 args -- filename (decluttered), course number and course domain.
     output: boolean -- 1 if file was uploaded.
   
 =back  =back
   
 =head2 Storing/Retreiving Data  =head2 Storing/Retreiving Data
Removed from v.1.1192  
changed lines
  Added in v.1.1195

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