--- loncom/interface/loncommon.pm 2017/11/16 13:31:29 1.1302 +++ loncom/interface/loncommon.pm 2018/07/04 13:44:16 1.1319 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # a pile of common routines # -# $Id: loncommon.pm,v 1.1302 2017/11/16 13:31:29 raeburn Exp $ +# $Id: loncommon.pm,v 1.1319 2018/07/04 13:44:16 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -86,6 +86,8 @@ use MIME::Lite; use MIME::Types; use File::Copy(); use File::Path(); +use String::CRC32(); +use Short::URL(); # ---------------------------------------------- Designs use vars qw(%defaultdesign); @@ -201,7 +203,7 @@ BEGIN { { my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/language.tab'; - if ( open(my $fh,"<$langtabfile") ) { + if ( open(my $fh,'<',$langtabfile) ) { while (my $line = <$fh>) { next if ($line=~/^\#/); chomp($line); @@ -223,7 +225,7 @@ BEGIN { { my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}. '/copyright.tab'; - if ( open (my $fh,"<$copyrightfile") ) { + if ( open (my $fh,'<',$copyrightfile) ) { while (my $line = <$fh>) { next if ($line=~/^\#/); chomp($line); @@ -237,7 +239,7 @@ BEGIN { { my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}. '/source_copyright.tab'; - if ( open (my $fh,"<$sourcecopyrightfile") ) { + if ( open (my $fh,'<',$sourcecopyrightfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -251,7 +253,7 @@ BEGIN { # -------------------------------------------------------------- default domain designs my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors'; my $designfile = $designdir.'/default.tab'; - if ( open (my $fh,"<$designfile") ) { + if ( open (my $fh,'<',$designfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -265,7 +267,7 @@ BEGIN { { my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/filecategories.tab'; - if ( open (my $fh,"<$categoryfile") ) { + if ( open (my $fh,'<',$categoryfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -280,7 +282,7 @@ BEGIN { { my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}. '/filetypes.tab'; - if ( open (my $fh,"<$typesfile") ) { + if ( open (my $fh,'<',$typesfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -1295,9 +1297,13 @@ sub help_open_topic { } # Add the text + my $target = ' target="_top"'; + if (($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) { + $target = ''; + } if ($text ne "") { $template.='' - .'' + .'' .$text.''; } @@ -1307,7 +1313,7 @@ sub help_open_topic { if ($imgid ne '') { $imgid = ' id="'.$imgid.'"'; } - $template.=' ' + $template.=' ' .''.&mt('Help: [_1]',$topic).'$text"; + "$text"; } # Add the graphic my $title = &mt('Report a Bug'); my $bugicon=&lonhttpdurl("/adm/lonMisc/smallBug.gif"); $template .= <<"ENDTEMPLATE"; - (Bug: $topic) + (Bug: $topic) ENDTEMPLATE if ($text ne '') { $template.='' }; return $template; @@ -2223,6 +2234,7 @@ sub import_crsauthor_form { } my @ordered = (); foreach my $file (sort { lc($a) cmp lc($b) } (keys(%{$files{$key}}))) { + next if ($file =~ /\.rights$/); if ($only) { my ($ext) = ($file =~ /\.([^.]+)$/); unless ($possexts{lc($ext)}) { @@ -2266,11 +2278,13 @@ sub import_crsauthor_form { unless ($possexts{lc($ext)}) { next; } + } else { + next if ($file =~ /\.rights$/); } push(@singledirfiles,$file); } if (@singledirfiles) { - $possdirs == 1; + $possdirs = 1; } } if (($possdirs == 1) && (@singledirfiles)) { @@ -3025,6 +3039,8 @@ This is not an optimal method, but it wo =item * authform_filesystem +=item * authform_lti + =back See loncreateuser.pm for invocation and use examples. @@ -3441,14 +3457,69 @@ sub authform_filesystem { $fsyscheck.' onchange="'.$jscall.'" onclick="'. $jscall.'"'.$disabled.' />'; } - $autharg = ''; $result = &mt ('[_1] Filesystem Authenticated (with initial password [_2])', - ''); + ''.$autharg); + return $result; +} + +sub authform_lti { + my %in = ( + formname => 'document.cu', + kerb_def_dom => 'MSU.EDU', + @_, + ); + my ($lticheck,$result,$authtype,$autharg,$jscall,$disabled); + my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'}); + if ($in{'readonly'}) { + $disabled = ' disabled="disabled"'; + } + if (defined($in{'curr_authtype'})) { + if ($in{'curr_authtype'} eq 'lti') { + if ($can_assign{'lti'}) { + $lticheck = 'checked="checked" '; + if (defined($in{'mode'})) { + if ($in{'mode'} eq 'modifyuser') { + $lticheck = ''; + } + } + } else { + $result = &mt('Currently LTI Authenticated.'); + return $result; + } + } + } else { + if ($authnum == 1) { + $authtype = ''; + } + } + if (!$can_assign{'lti'}) { + return; + } elsif ($authtype eq '') { + if (defined($in{'mode'})) { + if ($in{'mode'} eq 'modifycourse') { + if ($authnum == 1) { + $authtype = ''; + } + } + } + } + $jscall = "javascript:changed_radio('lti',$in{'formname'});"; + if (($authtype eq '') && (($in{'mode'} eq 'modifycourse') || ($in{'curr_authtype'} ne 'lti'))) { + $authtype = ''; + } + $autharg = ''; + if ($authtype) { + $result = &mt('[_1] LTI Authenticated', + ''.$autharg); + } else { + $result = ''.&mt('LTI Authenticated').''. + $autharg; + } return $result; } @@ -3462,6 +3533,7 @@ sub get_assignable_auth { krb5 => 1, int => 1, loc => 1, + lti => 1, ); my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$dom); if (ref($domconfig{'usercreation'}) eq 'HASH') { @@ -4579,9 +4651,15 @@ sub get_previous_attempt { } $prevattempts.= &end_data_table_row().&end_data_table(); } else { + my $msg; + if ($symb =~ /ext\.tool$/) { + $msg = &mt('No grade passed back.'); + } else { + $msg = &mt('Nothing submitted - no attempts.'); + } $prevattempts= &start_data_table().&start_data_table_row(). - ''.&mt('Nothing submitted - no attempts.').''. + ''.$msg.''. &end_data_table_row().&end_data_table(); } } else { @@ -4686,6 +4764,9 @@ sub get_student_view { } if (defined($target)) { $form{'grade_target'} = $target; } $feedurl=&Apache::lonnet::clutter($feedurl); + if (($feedurl =~ /ext\.tool$/) && ($target eq 'tex')) { + $feedurl =~ s{^/adm/wrapper}{}; + } my ($userview,$response)=&Apache::lonnet::ssi_body($feedurl,%form); $userview=~s/\]*\>//gi; $userview=~s/\<\/body\>//gi; @@ -5115,7 +5196,7 @@ sub blockcheck { ($env{'request.role'} !~ m{^st\./\Q$cdom\E/\Q$cnum\E})); next if ($no_userblock); - # Retrieve blocking times and identity of locker for course + # Retrieve blocking times and identity of blocker for course # of specified user, unless user has 'evb' privilege. my ($start,$end,$trigger) = @@ -5569,7 +5650,7 @@ sub get_legacy_domconf { my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors'; my $designfile = $designdir.'/'.$udom.'.tab'; if (-e $designfile) { - if ( open (my $fh,"<$designfile") ) { + if ( open (my $fh,'<',$designfile) ) { while (my $line = <$fh>) { next if ($line =~ /^\#/); chomp($line); @@ -5768,13 +5849,18 @@ sub CSTR_pageheader { $title = &mt('Authoring Space'); } + my ($target,$crumbtarget) = (' target="_top"','_top'); #FIXME lonpubdir: target="_parent" + if (($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) { + $target = ''; + $crumbtarget = ''; + } + my $output = '
' .&Apache::loncommon::help_open_menu('','',3,'Authoring') #FIXME: Broken? Where is it? .''.$title.' ' - .'
' #FIXME lonpubdir: target="_parent" - .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv/'.$udom,undef,undef); + .'' + .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,$crumbtarget,'/priv/'.$udom,undef,undef); if ($lastitem) { $output .= @@ -5788,7 +5874,7 @@ sub CSTR_pageheader { } else { $output .= '
' - #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/','_top','/priv','','+1',1)."
" + #FIXME lonpubdir: &Apache::lonhtmlcommon::crumbs($uname.$thisdisfn.'/',$crumbtarget,'/priv','','+1',1)."
" .&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()') .'
' .&Apache::lonmenu::constspaceform(); @@ -5846,6 +5932,19 @@ Inputs: inlineremote items to be added in "Functions" menu below breadcrumbs. +=item * $ltiscope, optional argument, will be one of: resource, map or + course, if LON-CAPA is in LTI Provider context. Value is + the scope of use, i.e., launch was for access to a single, a map + or the entire course. + +=item * $ltiuri, optional argument, if LON-CAPA is in LTI Provider + context, this will contain the URL for the landing item in + the course, after launch from an LTI Consumer + +=item * $ltimenu, optional argument, if LON-CAPA is in LTI Provider + context, this will contain a reference to hash of items + to be included in the page header and/or inline menu. + =back Returns: A uniform header for LON-CAPA web pages. @@ -5857,7 +5956,7 @@ other decorations will be returned. sub bodytag { my ($title,$function,$addentries,$bodyonly,$domain,$forcereg, - $no_nav_bar,$bgcolor,$args,$advtoolsref)=@_; + $no_nav_bar,$bgcolor,$args,$advtoolsref,$ltiscope,$ltiuri,$ltimenu)=@_; my $public; if ((($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public')) @@ -5928,7 +6027,18 @@ sub bodytag { if ($public) { undef($role); } - + + if (($env{'request.course.id'}) && ($env{'request.lti.login'})) { + if (ref($ltimenu) eq 'HASH') { + unless ($ltimenu->{'role'}) { + undef($role); + } + unless ($ltimenu->{'coursetitle'}) { + $realm=' '; + } + } + } + my $titleinfo = '

'.$title.'

'; # # Extra info if you are the DC @@ -5962,27 +6072,29 @@ sub bodytag { $bodytag .= Apache::lonhtmlcommon::scripttag( Apache::lonmenu::utilityfunctions($httphost), 'start'); - my ($left,$right) = Apache::lonmenu::primary_menu($crstype); + unless ($args->{'no_primary_menu'}) { + my ($left,$right) = Apache::lonmenu::primary_menu($crstype,$ltimenu); - if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) { - if ($dc_info) { - $dc_info = qq|$dc_info|; - } - $bodytag .= qq|
$left $role
- $realm $dc_info
|; - return $bodytag; - } + if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) { + if ($dc_info) { + $dc_info = qq|$dc_info|; + } + $bodytag .= qq|
$left $role
+ $realm $dc_info
|; + return $bodytag; + } - unless ($env{'request.symb'} =~ m/\.page___\d+___/) { - $bodytag .= qq|
$left $role
|; - } + unless ($env{'request.symb'} =~ m/\.page___\d+___/) { + $bodytag .= qq|
$left $role
|; + } - $bodytag .= $right; + $bodytag .= $right; - if ($dc_info) { - $dc_info = &dc_courseid_toggle($dc_info); + if ($dc_info) { + $dc_info = &dc_courseid_toggle($dc_info); + } + $bodytag .= qq|
$realm $dc_info
|; } - $bodytag .= qq|
$realm $dc_info
|; #if directed to not display the secondary menu, don't. if ($args->{'no_secondary_menu'}) { @@ -5990,17 +6102,20 @@ sub bodytag { } #don't show menus for public users if (!$public){ - $bodytag .= Apache::lonmenu::secondary_menu($httphost); + unless ($args->{'no_inline_menu'}) { + $bodytag .= Apache::lonmenu::secondary_menu($httphost,$ltiscope,$ltimenu, + $args->{'no_primary_menu'}); + } $bodytag .= Apache::lonmenu::serverform(); $bodytag .= Apache::lonhtmlcommon::scripttag('', 'end'); if ($env{'request.state'} eq 'construct') { $bodytag .= &Apache::lonmenu::innerregister($forcereg, - $args->{'bread_crumbs'},'','',$hostname); + $args->{'bread_crumbs'},'','',$hostname,$ltiscope,$ltiuri); } elsif ($forcereg) { $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef, $args->{'group'}, $args->{'hide_buttons'}, - $hostname); + $hostname,$ltiscope,$ltiuri); } else { $bodytag .= &Apache::lonmenu::prepare_functions($env{'request.noversionuri'}, @@ -8602,11 +8717,42 @@ sub start_page { #&Apache::lonnet::logthis("start_page ".join(':',caller(0))); $env{'internal.start_page'}++; - my ($result,@advtools); + my ($result,@advtools,$ltiscope,$ltiuri,%ltimenu); if (! exists($args->{'skip_phases'}{'head'}) ) { $result .= &xml_begin($args->{'frameset'}) . &headtag($title, $head_extra, $args); } + + if (($env{'request.course.id'}) && ($env{'request.lti.login'})) { + if ($env{'course.'.$env{'request.course.id'}.'.lti.override'}) { + unless ($env{'course.'.$env{'request.course.id'}.'.lti.topmenu'}) { + $args->{'no_primary_menu'} = 1; + } + unless ($env{'course.'.$env{'request.course.id'}.'.lti.inlinemenu'}) { + $args->{'no_inline_menu'} = 1; + } + if ($env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'}) { + map { $ltimenu{$_} = 1; } split(/,/,$env{'course.'.$env{'request.course.id'}.'.lti.lcmenu'}); + } + } else { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider'); + if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') { + unless ($lti{$env{'request.lti.login'}}{'topmenu'}) { + $args->{'no_primary_menu'} = 1; + } + unless ($lti{$env{'request.lti.login'}}{'inlinemenu'}) { + $args->{'no_inline_menu'} = 1; + } + if (ref($lti{$env{'request.lti.login'}}{'lcmenu'}) eq 'ARRAY') { + map { $ltimenu{$_} = 1; } @{$lti{$env{'request.lti.login'}}{'lcmenu'}}; + } + } + } + ($ltiscope,$ltiuri) = &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'}, + $env{'course.'.$env{'request.course.id'}.'.domain'}, + $env{'course.'.$env{'request.course.id'}.'.num'}); + } if (! exists($args->{'skip_phases'}{'body'}) ) { if ($args->{'frameset'}) { @@ -8620,7 +8766,7 @@ sub start_page { $args->{'only_body'}, $args->{'domain'}, $args->{'force_register'}, $args->{'no_nav_bar'}, $args->{'bgcolor'}, $args, - \@advtools); + \@advtools,$ltiscope,$ltiuri,\%ltimenu); } } @@ -8656,6 +8802,7 @@ sub start_page { my $menulink; # if arg: bread_crumbs_nomenu is true pass 0 as $menulink item. if ((exists($args->{'bread_crumbs_nomenu'})) || + ($ltiscope eq 'map') || ($ltiscope eq 'resource') || ((($args->{'crstype'} eq 'Placement') || (($env{'request.course.id'}) && ($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement'))) && (!$env{'request.role.adv'}))) { @@ -9188,14 +9335,21 @@ function expand_div(caller) { sub simple_error_page { my ($r,$title,$msg,$args) = @_; + my %displayargs; if (ref($args) eq 'HASH') { if (!$args->{'no_auto_mt_msg'}) { $msg = &mt($msg); } + if ($args->{'only_body'}) { + $displayargs{'only_body'} = 1; + } + if ($args->{'no_nav_bar'}) { + $displayargs{'no_nav_bar'} = 1; + } } else { $msg = &mt($msg); } my $page = - &Apache::loncommon::start_page($title). + &Apache::loncommon::start_page($title,'',\%displayargs). '

'.$msg.'

'. &Apache::loncommon::end_page(); if (ref($r)) { @@ -12054,7 +12208,7 @@ sub modify_html_refs { return; } } - if (open(my $fh,"<$container")) { + if (open(my $fh,'<',$container)) { $content = join('', <$fh>); close($fh); } else { @@ -12119,7 +12273,7 @@ sub modify_html_refs { } } } else { - if (open(my $fh,">$container")) { + if (open(my $fh,'>',$container)) { print $fh $content; close($fh); $output = '

'.&mt('Updated [quant,_1,reference] in [_2].', @@ -13748,7 +13902,7 @@ sub upfile_store { { my $datafile = $r->dir_config('lonDaemons'). '/tmp/'.$datatoken.'.tmp'; - if ( open(my $fh,">$datafile") ) { + if ( open(my $fh,'>',$datafile) ) { print $fh $env{'form.upfile'}; close($fh); } @@ -13773,7 +13927,7 @@ sub load_tmp_file { { my $studentfile = $r->dir_config('lonDaemons'). '/tmp/'.$datatoken.'.tmp'; - if ( open(my $fh,"<$studentfile") ) { + if ( open(my $fh,'<',$studentfile) ) { @studentdata=<$fh>; close($fh); } @@ -16169,13 +16323,14 @@ sub group_term { } sub course_types { - my @types = ('official','unofficial','community','textbook','placement'); + my @types = ('official','unofficial','community','textbook','placement','lti'); my %typename = ( official => 'Official course', unofficial => 'Unofficial course', community => 'Community', textbook => 'Textbook course', placement => 'Placement test', + lti => 'LTI provider', ); return (\@types,\%typename); } @@ -16411,7 +16566,7 @@ sub init_user_environment { undef,\%userenv,\%domdef,\%is_adv); } - foreach my $crstype ('official','unofficial','community','textbook','placement') { + foreach my $crstype ('official','unofficial','community','textbook','placement','lti') { $userenv{'canrequest.'.$crstype} = &Apache::lonnet::usertools_access($username,$domain,$crstype, 'reload','requestcourses', @@ -17304,19 +17459,31 @@ sub update_content_constraints { my ($cdom,$cnum,$chome,$cid) = @_; my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired'); my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'}); - my %checkresponsetypes; + my (%checkresponsetypes,%checkcrsrestypes); foreach my $key (keys(%Apache::lonnet::needsrelease)) { my ($item,$name,$value) = split(/:/,$key); if ($item eq 'resourcetag') { if ($name eq 'responsetype') { $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key} } + } elsif ($item eq 'course') { + if ($name eq 'courserestype') { + $checkcrsrestypes{$value} = $Apache::lonnet::needsrelease{$key}; + } } } my $navmap = Apache::lonnavmaps::navmap->new(); if (defined($navmap)) { - my %allresponses; - foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) { + my (%allresponses,%allcrsrestypes); + foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) { + if ($res->is_tool()) { + if ($allcrsrestypes{'exttool'}) { + $allcrsrestypes{'exttool'} ++; + } else { + $allcrsrestypes{'exttool'} = 1; + } + next; + } my %responses = $res->responseTypes(); foreach my $key (keys(%responses)) { next unless(exists($checkresponsetypes{$key})); @@ -17329,8 +17496,24 @@ sub update_content_constraints { ($reqdmajor,$reqdminor) = ($major,$minor); } } + foreach my $key (keys(%allcrsrestypes)) { + my ($major,$minor) = split(/\./,$checkcrsrestypes{$key}); + if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) { + ($reqdmajor,$reqdminor) = ($major,$minor); + } + } undef($navmap); } + my $suppmap = 'supplemental.sequence'; + my ($suppcount,$supptools,$errors) = (0,0,0); + ($suppcount,$supptools,$errors) = &recurse_supplemental($cnum,$cdom,$suppmap, + $suppcount,$supptools,$errors); + if ($supptools) { + my ($major,$minor) = split(/\./,$checkcrsrestypes{'exttool'}); + if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) { + ($reqdmajor,$reqdminor) = ($major,$minor); + } + } unless (($reqdmajor eq '') && ($reqdminor eq '')) { &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid); } @@ -17387,7 +17570,7 @@ sub parse_supplemental_title { } sub recurse_supplemental { - my ($cnum,$cdom,$suppmap,$numfiles,$errors) = @_; + my ($cnum,$cdom,$suppmap,$numfiles,$numexttools,$errors) = @_; if ($suppmap) { my ($errtext,$fatal) = &LONCAPA::map::mapread('/uploaded/'.$cdom.'/'.$cnum.'/'.$suppmap); if ($fatal) { @@ -17398,8 +17581,12 @@ sub recurse_supplemental { my ($title,$src,$ext,$type,$status)=split(/\:/,$res); if (($src ne '') && ($status eq 'res')) { if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) { - ($numfiles,$errors) = &recurse_supplemental($cnum,$cdom,$1,$numfiles,$errors); + ($numfiles,$numexttools,$errors) = &recurse_supplemental($cnum,$cdom,$1, + $numfiles,$numexttools,$errors); } else { + if ($src =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) { + $numexttools ++; + } $numfiles ++; } } @@ -17407,7 +17594,7 @@ sub recurse_supplemental { } } } - return ($numfiles,$errors); + return ($numfiles,$numexttools,$errors); } sub symb_to_docspath { @@ -17802,6 +17989,142 @@ sub des_decrypt { return $plaintext; } +sub make_short_symbs { + my ($cdom,$cnum,$navmap) = @_; + return unless (ref($navmap)); + my ($numnew,@errors); + my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny'); + if (@toshorten) { + my (%maps,%resources,%titles); + &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles, + 'shorturls',$cdom,$cnum); + my %tocreate; + if (keys(%resources)) { + foreach my $item (sort {$a <=> $b} (@toshorten)) { + my $symb = $resources{$item}; + if ($symb) { + $tocreate{$cnum.'&'.$symb} = 1; + } + } + } + if (keys(%tocreate)) { + my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum); + my $su = Short::URL->new(no_vowels => 1); + my $init = ''; + my (%newunique,%addcourse,%courseonly,%failed); + # get lock on tiny db + my $now = time; + my $lockhash = { + "lock\0$now" => $env{'user.name'}. + ':'.$env{'user.domain'}, + }; + my $tries = 0; + my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom); + my ($code,$error); + while (($gotlock ne 'ok') && ($tries<3)) { + $tries ++; + sleep 1; + $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom); + } + if ($gotlock eq 'ok') { + $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique, + \%addcourse,\%courseonly,\%failed); + if (keys(%failed)) { + my $numfailed = scalar(keys(%failed)); + push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed)); + } + if (keys(%newunique)) { + my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom); + if ($putres eq 'ok') { + $numnew = scalar(keys(%newunique)); + my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum); + unless ($newputres eq 'ok') { + push(@errors,&mt('error: could not store course look-up of short URLs')); + } + } else { + push(@errors,&mt('error: could not store unique six character URLs')); + } + } + my $dellockres = &Apache::lonnet::del_dom('tiny',["lock\0$now"],$cdom); + unless ($dellockres eq 'ok') { + push(@errors,&mt('error: could not release lockfile')); + } + } else { + push(@errors,&mt('error: could not obtain lockfile')); + } + if (keys(%courseonly)) { + my $result = &Apache::lonnet::newput('tiny',\%courseonly,$cdom,$cnum); + if ($result ne 'ok') { + push(@errors,&mt('error: could not update course look-up of short URLs')); + } + } + } + } + return ($numnew,\@errors); +} + +sub shorten_symbs { + my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_; + return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') && + (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') && + (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH')); + my (%possibles,%collisions); + foreach my $key (keys(%{$tocreate})) { + my $num = String::CRC32::crc32($key); + my $tiny = $su->encode($num,$init); + if ($tiny) { + $possibles{$tiny} = $key; + } + } + if (!$init) { + $init = 1; + } else { + $init ++; + } + if (keys(%possibles)) { + my @posstiny = keys(%possibles); + my $configuname = &Apache::lonnet::get_domainconfiguser($cdom); + my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname); + if (keys(%currtiny)) { + foreach my $key (keys(%currtiny)) { + next if ($currtiny{$key} eq ''); + if ($currtiny{$key} eq $possibles{$key}) { + my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key}); + unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) { + $courseonly->{$tsymb} = $key; + } + } else { + $collisions{$possibles{$key}} = 1; + } + delete($possibles{$key}); + } + } + foreach my $key (keys(%possibles)) { + $newunique->{$key} = $possibles{$key}; + my ($tcnum,$tsymb) = split(/\&/,$possibles{$key}); + unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) { + $addcourse->{$tsymb} = $key; + } + } + } + if (keys(%collisions)) { + if ($init <5) { + if (!$init) { + $init = 1; + } else { + $init ++; + } + $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions, + $newunique,$addcourse,$courseonly,$failed); + } else { + foreach my $key (keys(%collisions)) { + $failed->{$key} = 1; + } + } + } + return $init; +} + 1; __END__;