--- loncom/interface/loncoursedata.pm 2003/07/14 13:10:39 1.81 +++ loncom/interface/loncoursedata.pm 2007/04/03 20:04:54 1.181 @@ -1,6 +1,6 @@ # The LearningOnline Network with CAPA # -# $Id: loncoursedata.pm,v 1.81 2003/07/14 13:10:39 matthew Exp $ +# $Id: loncoursedata.pm,v 1.181 2007/04/03 20:04:54 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -38,24 +38,24 @@ Set of functions that download and proce =head1 PACKAGES USED - Apache::Constants qw(:common :http) - Apache::lonnet() - Apache::lonhtmlcommon - HTML::TokeParser - GDBM_File - + Apache::lonnet + Apache::longroup + Time::HiRes + Apache::lonmysql + LONCAPA + Digest::MD5 + =cut package Apache::loncoursedata; use strict; -use Apache::Constants qw(:common :http); -use Apache::lonnet(); -use Apache::lonhtmlcommon; -use Time::HiRes; -use Apache::lonmysql; -use HTML::TokeParser; -use GDBM_File; +use Apache::lonnet; +use Apache::longroup(); +use Time::HiRes(); +use Apache::lonmysql(); +use LONCAPA; +use Digest::MD5(); =pod @@ -66,240 +66,6 @@ and/or itself. =cut -#################################################### -#################################################### - -=pod - -=item &get_sequence_assessment_data() - -AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED - -Use lonnavmaps to build a data structure describing the order and -assessment contents of each sequence in the current course. - -The returned structure is a hash reference. - -{ title => 'title', - symb => 'symb', - src => '/s/o/u/r/c/e', - type => (container|assessment), - num_assess => 2, # only for container - parts => [11,13,15], # only for assessment - response_ids => [12,14,16], # only for assessment - contents => [........] # only for container -} - -$hash->{'contents'} is a reference to an array of hashes of the same structure. - -Also returned are array references to the sequences and assessments contained -in the course. - - -=cut - -#################################################### -#################################################### -sub get_sequence_assessment_data { - my $fn=$ENV{'request.course.fn'}; - ## - ## use navmaps - my $navmap = Apache::lonnavmaps::navmap->new($fn.".db", - $fn."_parms.db",1,0); - if (!defined($navmap)) { - return 'Can not open Coursemap'; - } - # We explicity grab the top level map because I am not sure we - # are pulling it from the iterator. - my $top_level_map = $navmap->getById('0.0'); - # - my $iterator = $navmap->getIterator(undef, undef, undef, 1); - my $curRes = $iterator->next(); # Top level sequence - ## - ## Prime the pump - ## - ## We are going to loop until we run out of sequences/pages to explore for - ## resources. This means we have to start out with something to look - ## at. - my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'}; - my $symb = $top_level_map->symb(); - my $src = $top_level_map->src(); - my $randompick = $top_level_map->randompick(); - # - my @Sequences; - my @Assessments; - my @Nested_Sequences = (); # Stack of sequences, keeps track of depth - my $top = { title => $title, - src => $src, - symb => $symb, - type => 'container', - num_assess => 0, - num_assess_parts => 0, - contents => [], - randompick => $randompick, - }; - push (@Sequences,$top); - push (@Nested_Sequences, $top); - # - # We need to keep track of which sequences contain homework problems - # - my $previous_too; - my $previous; - while (scalar(@Nested_Sequences)) { - $previous_too = $previous; - $previous = $curRes; - $curRes = $iterator->next(); - my $currentmap = $Nested_Sequences[-1]; # Last one on the stack - if ($curRes == $iterator->BEGIN_MAP()) { - if (! ref($previous)) { - $previous = $previous_too; - } - if (! ref($previous)) { - next; - } - # get the map itself, instead of BEGIN_MAP - $title = $previous->title(); - $symb = $previous->symb(); - $src = $previous->src(); - # pick up the filename if there is no title available - if (! defined($title) || $title eq '') { - ($title) = ($src=~/\/([^\/]*)$/); - } - $randompick = $previous->randompick(); - my $newmap = { title => $title, - src => $src, - symb => $symb, - type => 'container', - num_assess => 0, - randompick => $randompick, - contents => [], - }; - push (@{$currentmap->{'contents'}},$newmap); # this is permanent - push (@Sequences,$newmap); - push (@Nested_Sequences, $newmap); # this is a stack - next; - } - if ($curRes == $iterator->END_MAP()) { - pop(@Nested_Sequences); - next; - } - next if (! ref($curRes)); - next if (! $curRes->is_problem());# && !$curRes->randomout); - # Okay, from here on out we only deal with assessments - $title = $curRes->title(); - $symb = $curRes->symb(); - $src = $curRes->src(); - my $parts = $curRes->parts(); - my $assessment = { title => $title, - src => $src, - symb => $symb, - type => 'assessment', - parts => $parts, - num_parts => scalar(@$parts), - }; - push(@Assessments,$assessment); - push(@{$currentmap->{'contents'}},$assessment); - $currentmap->{'num_assess'}++; - $currentmap->{'num_assess_parts'}+= scalar(@$parts); - } - $navmap->untieHashes(); - return ($top,\@Sequences,\@Assessments); -} - -sub LoadDiscussion { - my ($courseID)=@_; - my %Discuss=(); - my %contrib=&Apache::lonnet::dump( - $courseID, - $ENV{'course.'.$courseID.'.domain'}, - $ENV{'course.'.$courseID.'.num'}); - - #my %contrib=&DownloadCourseInformation($name, $courseID, 0); - - foreach my $temp(keys %contrib) { - if ($temp=~/^version/) { - my $ver=$contrib{$temp}; - my ($dummy,$prb)=split(':',$temp); - for (my $idx=1; $idx<=$ver; $idx++ ) { - my $name=$contrib{"$idx:$prb:sendername"}; - $Discuss{"$name:$prb"}=$idx; - } - } - } - - return \%Discuss; -} - -################################################ -################################################ - -=pod - -=item &GetUserName(username,userdomain) - -Returns a hash with the following entries: - 'firstname', 'middlename', 'lastname', 'generation', and 'fullname' - - 'fullname' is the result of &Apache::loncoursedata::ProcessFullName. - -=cut - -################################################ -################################################ -sub GetUserName { - my ($username,$userdomain) = @_; - $username = $ENV{'user.name'} if (! defined($username)); - $userdomain = $ENV{'user.domain'} if (! defined($username)); - my %userenv = &Apache::lonnet::get('environment', - ['firstname','middlename','lastname','generation'], - $userdomain,$username); - $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'}, - $userenv{'generation'}, - $userenv{'firstname'}, - $userenv{'middlename'}); - return %userenv; -} - -################################################ -################################################ - -=pod - -=item &ProcessFullName() - -Takes lastname, generation, firstname, and middlename (or some partial -set of this data) and returns the full name version as a string. Format -is Lastname generation, firstname middlename or a subset of this. - -=cut - -################################################ -################################################ -sub ProcessFullName { - my ($lastname, $generation, $firstname, $middlename)=@_; - my $Str = ''; - - # Strip whitespace preceeding & following name components. - $lastname =~ s/(\s+$|^\s+)//g; - $generation =~ s/(\s+$|^\s+)//g; - $firstname =~ s/(\s+$|^\s+)//g; - $middlename =~ s/(\s+$|^\s+)//g; - - if($lastname ne '') { - $Str .= $lastname; - $Str .= ' '.$generation if ($generation ne ''); - $Str .= ','; - $Str .= ' '.$firstname if ($firstname ne ''); - $Str .= ' '.$middlename if ($middlename ne ''); - } else { - $Str .= $firstname if ($firstname ne ''); - $Str .= ' '.$middlename if ($middlename ne ''); - $Str .= ' '.$generation if ($generation ne ''); - } - - return $Str; -} - ################################################ ################################################ @@ -309,7 +75,7 @@ sub ProcessFullName { Returns a reference to a hash as described by $values. $values is assumed to be the result of - join(':',map {&Apache::lonnet::escape($_)} %orighash); + join(':',map {&escape($_)} %orighash); This is a helper function for get_current_state. @@ -319,8 +85,7 @@ This is a helper function for get_curren ################################################ sub make_into_hash { my $values = shift; - my %tmp = map { &Apache::lonnet::unescape($_); } - split(':',$values); + my %tmp = map { &unescape($_); } split(':',$values); return \%tmp; } @@ -362,6 +127,13 @@ interface in lonmysql.pm and I shudder a =over 4 +=item Tables used to store meta information + +The following tables hold data required to keep track of the current status +of a students data in the tables or to look up the students data in the tables. + +=over 4 + =item $symb_table The symb_table has two columns. The first is a 'symb_id' and the second @@ -379,20 +151,34 @@ characters) and a KEY on 'part_id'. =item $student_table -The student_table has two columns. The first is a 'student_id' and the second -is the text description of the 'student' (typically username:domain) (less -than 100 characters). The 'student_id' is automatically generated by MySQL. -The use of the name 'student_id' is loaded, I know, but this ID is used ONLY -internally to the MySQL database and is not the same as the students ID -(stored in the students environment). This table has its PRIMARY KEY on the -'student' (100 characters). - -=item $updatetime_table - -The updatetime_table has two columns. The first is 'student' (100 characters, -typically username:domain). The second is 'updatetime', which is an unsigned -integer, NOT a MySQL date. This table has its PRIMARY KEY on 'student' (100 -characters). +The student_table has 7 columns. The first is a 'student_id' assigned by +MySQL. The second is 'student' which is username:domain. The third through +fifth are 'section', 'status' (enrollment status), and 'classification' +(to be used in the future). The sixth and seventh ('updatetime' and +'fullupdatetime') contain the time of last update and full update of student +data. This table has its PRIMARY KEY on the 'student_id' column and is indexed +on 'student', 'section', and 'status'. + +=item $groupnames_table + +The groupnames_table has 2 columns. The first is a 'group_id' assigned by +MySQL. The second is 'groupname' which is the name of the group in the course. + +=item $students_groups_table + +The students_groups_table has 2 columns. The first is the 'student_id', and the +second is the 'group_id'. These two columns comprise the PRIMARY KEY for this +table, as an individual student may be affiliated with more than one group at +any time. This table is indexed on both student_id and group_id. + +=back + +=item Tables used to store current status data + +The following tables store data only about the students current status on +a problem, meaning only the data related to the last attempt on a problem. + +=over 4 =item $performance_table @@ -416,6 +202,53 @@ limited to 255 characters. 'value' is l =back +=item Tables used for storing historic data + +The following tables are used to store almost all of the transactions a student +has made on a homework problem. See loncapa/docs/homework/datastorage for +specific information about each of the parameters stored. + +=over 4 + +=item $fulldump_response_table + +The response table holds data (documented in loncapa/docs/homework/datastorage) +associated with a particular response id which is stored when a student +attempts a problem. The following are the columns of the table, in order: +'symb_id','part_id','response_id','student_id','transaction','tries', +'awarddetail', 'response_specific', 'response_specific_value', +'response_specific_2', 'response_specific_value_2', and 'submission +(the text of the students submission). The primary key is based on the +first five columns listed above. + +=item $fulldump_part_table + +The part table holds data (documented in loncapa/docs/homework/datastorage) +associated with a particular part id which is stored when a student attempts +a problem. The following are the columns of the table, in order: +'symb_id','part_id','student_id','transaction','tries','award','awarded', +and 'previous'. The primary key is based on the first five columns listed +above. + +=item $fulldump_timestamp_table + +The timestamp table holds the timestamps of the transactions which are +stored in $fulldump_response_table and $fulldump_part_table. This data is +about both the response and part data. Columns: 'symb_id','student_id', +'transaction', and 'timestamp'. +The primary key is based on the first 3 columns. + +=item $weight_table + +The weight table holds the weight for the problems used in the class. +Whereas the weight of a problem can vary by section and student the data +here is applied to the class as a whole. +Columns: 'symb_id','part_id','response_id','weight'. + +=back + +=back + =head3 Important Subroutines Here is a brief overview of the subroutines which are likely to be of @@ -444,16 +277,22 @@ interest: ################################################ ################################################ -{ +{ # Begin scope of table identifiers my $current_course =''; my $symb_table; my $part_table; my $student_table; -my $updatetime_table; +my $groupnames_table; +my $students_groups_table; my $performance_table; my $parameters_table; +my $fulldump_response_table; +my $fulldump_part_table; +my $fulldump_timestamp_table; +my $weight_table; +my @Tables; ################################################ ################################################ @@ -473,14 +312,14 @@ store student data. ################################################ ################################################ sub init_dbs { - my $courseid = shift; + my ($courseid,$drop) = @_; &setup_table_names($courseid); # # Drop any of the existing tables - foreach my $table ($symb_table,$part_table,$student_table, - $updatetime_table,$performance_table, - $parameters_table) { - &Apache::lonmysql::drop_table($table); + if ($drop) { + foreach my $table (@Tables) { + &Apache::lonmysql::drop_table($table); + } } # # Note - changes to this table must be reflected in the code that @@ -508,7 +347,7 @@ sub init_dbs { restrictions => 'NOT NULL', auto_inc => 'yes', }, { name => 'part', - type => 'VARCHAR(100)', + type => 'VARCHAR(100) BINARY', restrictions => 'NOT NULL'}, ], 'PRIMARY KEY' => ['part (100)'], @@ -523,24 +362,59 @@ sub init_dbs { restrictions => 'NOT NULL', auto_inc => 'yes', }, { name => 'student', - type => 'VARCHAR(100)', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL UNIQUE'}, + { name => 'section', + type => 'VARCHAR(100) BINARY', restrictions => 'NOT NULL'}, + { name => 'start', + type => 'INT', + restrictions => 'NOT NULL'}, + { name => 'end', + type => 'INT', + restrictions => 'NOT NULL'}, + { name => 'classification', + type => 'VARCHAR(100) BINARY', }, + { name => 'updatetime', + type => 'INT UNSIGNED'}, + { name => 'fullupdatetime', + type => 'INT UNSIGNED'}, ], - 'PRIMARY KEY' => ['student (100)'], - 'KEY' => [{ columns => ['student_id']},], + 'PRIMARY KEY' => ['student_id'], + 'KEY' => [{ columns => ['student (100)', + 'section (100)', + 'start', + 'end']},], }; # - my $updatetime_table_def = { - id => $updatetime_table, + my $groupnames_table_def = { + id => $groupnames_table, permanent => 'no', - columns => [{ name => 'student', - type => 'VARCHAR(100)', - restrictions => 'NOT NULL UNIQUE',}, - { name => 'updatetime', - type => 'INT UNSIGNED', - restrictions => 'NOT NULL' }, - ], - 'PRIMARY KEY' => ['student (100)'], + columns => [{ name => 'group_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', + auto_inc => 'yes', }, + { name => 'groupname', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL UNIQUE'}, + ], + 'PRIMARY KEY' => ['group_id'], + 'KEY' => [{ columns => ['groupname (100)',]},], + }; + # + my $students_groups_table_def = { + id => $students_groups_table, + permanent => 'no', + columns => [{ name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', }, + { name => 'group_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', }, + ], + 'PRIMARY KEY' => ['student_id','group_id'], + 'KEY' => [{ columns => ['student_id'] }, + { columns => ['group_id'] },], }; # my $performance_table_def = { @@ -556,14 +430,14 @@ sub init_dbs { type => 'MEDIUMINT UNSIGNED', restrictions => 'NOT NULL' }, { name => 'part', - type => 'VARCHAR(100)', + type => 'VARCHAR(100) BINARY', restrictions => 'NOT NULL'}, { name => 'solved', type => 'TINYTEXT' }, { name => 'tries', type => 'SMALLINT UNSIGNED' }, { name => 'awarded', - type => 'TINYTEXT' }, + type => 'REAL' }, { name => 'award', type => 'TINYTEXT' }, { name => 'awarddetail', @@ -576,6 +450,110 @@ sub init_dbs { { columns=>['symb_id'] },], }; # + my $fulldump_part_table_def = { + id => $fulldump_part_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'tries', + type => 'SMALLINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'award', + type => 'TINYTEXT' }, + { name => 'awarded', + type => 'REAL' }, + { name => 'previous', + type => 'SMALLINT UNSIGNED' }, +# { name => 'regrader', +# type => 'TINYTEXT' }, +# { name => 'afterduedate', +# type => 'TINYTEXT' }, + ], + 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['part_id'] }, + { columns=>['student_id'] }, + ], + }; + # + my $fulldump_response_table_def = { + id => $fulldump_response_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'response_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'awarddetail', + type => 'TINYTEXT' }, +# { name => 'message', +# type => 'CHAR BINARY'}, + { name => 'response_specific', + type => 'TINYTEXT' }, + { name => 'response_specific_value', + type => 'TINYTEXT' }, + { name => 'response_specific_2', + type => 'TINYTEXT' }, + { name => 'response_specific_value_2', + type => 'TINYTEXT' }, + { name => 'submission', + type => 'TEXT'}, + ], + 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id', + 'transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['part_id','response_id'] }, + { columns=>['student_id'] }, + ], + }; + my $fulldump_timestamp_table_def = { + id => $fulldump_timestamp_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'timestamp', + type => 'INT UNSIGNED'}, + ], + 'PRIMARY KEY' => ['symb_id','student_id','transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['student_id'] }, + { columns=>['transaction'] }, + ], + }; + # my $parameters_table_def = { id => $parameters_table, permanent => 'no', @@ -594,6 +572,22 @@ sub init_dbs { 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'], }; # + my $weight_table_def = { + id => $weight_table, + permanent => 'no', + columns => [{ name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'weight', + type => 'REAL', + restrictions => 'NOT NULL' }, + ], + 'PRIMARY KEY' => ['symb_id','part_id'], + }; + # # Create the tables my $tableid; $tableid = &Apache::lonmysql::create_table($symb_table_def); @@ -617,13 +611,6 @@ sub init_dbs { return 3; } # - $tableid = &Apache::lonmysql::create_table($updatetime_table_def); - if (! defined($tableid)) { - &Apache::lonnet::logthis("error creating updatetime_table: ". - &Apache::lonmysql::get_error()); - return 4; - } - # $tableid = &Apache::lonmysql::create_table($performance_table_def); if (! defined($tableid)) { &Apache::lonnet::logthis("error creating preformance_table: ". @@ -637,6 +624,44 @@ sub init_dbs { &Apache::lonmysql::get_error()); return 6; } + # + $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_part_table: ". + &Apache::lonmysql::get_error()); + return 7; + } + # + $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_response_table: ". + &Apache::lonmysql::get_error()); + return 8; + } + $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ". + &Apache::lonmysql::get_error()); + return 9; + } + $tableid = &Apache::lonmysql::create_table($weight_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating weight_table: ". + &Apache::lonmysql::get_error()); + return 10; + } + $tableid = &Apache::lonmysql::create_table($groupnames_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating groupnames_table: ". + &Apache::lonmysql::get_error()); + return 11; + } + $tableid = &Apache::lonmysql::create_table($students_groups_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating student_groups_table: ". + &Apache::lonmysql::get_error()); + return 12; + } return 0; } @@ -647,20 +672,25 @@ sub init_dbs { =item &delete_caches() +This routine drops all the tables associated with a course from the +MySQL database. + +Input: course id (optional, determined by environment if omitted) + +Returns: nothing + =cut ################################################ ################################################ sub delete_caches { my $courseid = shift; - $courseid = $ENV{'request.course.id'} if (! defined($courseid)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); # &setup_table_names($courseid); # my $dbh = &Apache::lonmysql::get_dbh(); - foreach my $table ($symb_table,$part_table,$student_table, - $updatetime_table,$performance_table, - $parameters_table ){ + foreach my $table (@Tables) { my $command = 'DROP TABLE '.$table.';'; $dbh->do($command); if ($dbh->err) { @@ -842,8 +872,9 @@ sub get_student_id { $have_read_student_table = 1; } if (! exists($ids_by_student{$student})) { - &Apache::lonmysql::store_row($student_table,[undef,$student]); + &populate_student_table(); undef(%ids_by_student); + undef(%students_by_id); my @Result = &Apache::lonmysql::get_rows($student_table); foreach (@Result) { $ids_by_student{$_->[1]}=$_->[0]; @@ -867,6 +898,495 @@ sub get_student { return undef; # error } +sub populate_student_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$student_table. + "(student,section,start,end) VALUES "; + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my $classlist = &get_classlist($cdom,$cnum); + my $student_count=0; + while (my ($student,$data) = each %$classlist) { + my ($section,$start,$end) = ($data->[&CL_SECTION()], + $data->[&CL_START()], + $data->[&CL_END()]); + if ($section eq '' || $section =~ /^\s*$/) { + $section = 'none'; + } + if (!defined($start)) { $start = 0; } + if (!defined($end)) { $end = 0; } + $request .= "('".$student."','".$section."','".$start."','".$end."'),"; + $student_count++; + } + return if ($student_count == 0); + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occured executing \n". + $request); + } + return; +} + +my $have_read_groupnames_table = 0; +my %ids_by_groupname; + +sub get_group_id { + my ($groupname) = @_; + if (! $have_read_groupnames_table) { + my @Result = &Apache::lonmysql::get_rows($groupnames_table); + foreach (@Result) { + $ids_by_groupname{$_->[1]}=$_->[0]; + } + $have_read_groupnames_table = 1; + } + if (! exists($ids_by_groupname{$groupname})) { + &populate_groupnames_table(); + undef(%ids_by_groupname); + my @Result = &Apache::lonmysql::get_rows($groupnames_table); + foreach (@Result) { + $ids_by_groupname{$_->[1]}=$_->[0]; + } + } + if (exists($ids_by_groupname{$groupname})) { + return $ids_by_groupname{$groupname}; + } + return undef; # error +} + +sub populate_groupnames_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum); + return if (!%curr_groups); + my $request = 'INSERT IGNORE INTO '.$groupnames_table. + '(groupname) VALUES '; + foreach my $groupname (sort(keys(%curr_groups)),'none') { + $request .= "('".$groupname."'),"; + } + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occured executing \n". + $request); + } + return; +} + +my $have_read_studentsgroups_table = 0; +my %groupids_by_studentid; + +sub get_students_groupids { + my ($student_id) = @_; + if (! $have_read_studentsgroups_table) { + my @Result = &Apache::lonmysql::get_rows($students_groups_table); + foreach (@Result) { + push(@{$groupids_by_studentid{$_->[0]}},$_->[1]); + } + $have_read_studentsgroups_table = 1; + } + if (! exists($groupids_by_studentid{$student_id})) { + &populate_students_groups_table(); + undef(%groupids_by_studentid); + my @Result = &Apache::lonmysql::get_rows($students_groups_table); + foreach (@Result) { + push(@{$groupids_by_studentid{$_->[0]}},$_->[1]); + } + } + if (exists($groupids_by_studentid{$student_id})) { + if (ref($groupids_by_studentid{$student_id}) eq 'ARRAY') { + return @{$groupids_by_studentid{$student_id}}; + } + } + return undef; # error +} + + +sub populate_students_groups_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$students_groups_table. + "(student_id,group_id) VALUES "; + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my ($classlist,$keylist) = &get_classlist($cdom,$cnum); + my ($classgroups,$studentgroups) = &get_group_memberships($classlist, + $keylist, + $cdom,$cnum); + my $record_count = 0; + foreach my $student (sort(keys(%{$classgroups}))) { + my $student_id = &get_student_id(split(':',$student)); + my @studentsgroups = &get_students_groups($student,'Active',$classgroups); + if (@studentsgroups < 1) { + @studentsgroups = ('none'); + } + foreach my $groupname (@studentsgroups) { + my $group_id = &get_group_id($groupname); + $request .= "('".$student_id."','".$group_id."'),"; + $record_count++; + } + } + return if ($record_count == 0); + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occured executing \n". + $request); + } + return; +} + +################################################ +################################################ + +=pod + +=item &clear_internal_caches() + +Causes the internal caches used in get_student_id, get_student, +get_symb_id, get_symb, get_part_id, and get_part to be undef'd. + +Needs to be called before the first operation with the MySQL database +for a given Apache request. + +=cut + +################################################ +################################################ +sub clear_internal_caches { + $have_read_part_table = 0; + undef(%ids_by_part); + undef(%parts_by_id); + $have_read_symb_table = 0; + undef(%ids_by_symb); + undef(%symbs_by_id); + $have_read_student_table = 0; + undef(%ids_by_student); + undef(%students_by_id); + $have_read_groupnames_table = 0; + undef(%ids_by_groupname); +} + + +################################################ +################################################ + +sub symb_is_for_task { + my ($symb) = @_; + return ($symb =~ /\.task$/); +} + +################################################ +################################################ + +=pod + +=item &update_full_student_data($sname,$sdom,$courseid) + +Does a lonnet::dump on a student to populate the courses tables. + +Input: $sname, $sdom, $courseid + +Output: $returnstatus + +$returnstatus is a string describing any errors that occured. 'okay' is the +default. + +This subroutine loads a students data using lonnet::dump and inserts +it into the MySQL database. The inserts are done on three tables, +$fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table. +The INSERT calls are made directly by this subroutine, not through lonmysql +because we do a 'bulk'insert which takes advantage of MySQLs non-SQL +compliant INSERT command to insert multiple rows at a time. +If anything has gone wrong during this process, $returnstatus is updated with +a description of the error. + +Once the "fulldump" tables are updated, the tables used for chart and +spreadsheet (which hold only the current state of the student on their +homework, not historical data) are updated. If all updates have occured +successfully, $student_table is updated to reflect the time of the update. + +Notice we do not insert the data and immediately query it. This means it +is possible for there to be data returned this first time that is not +available the second time. CYA. + +=cut + +################################################ +################################################ +sub update_full_student_data { + my ($sname,$sdom,$courseid) = @_; + # + # Set up database names + &setup_table_names($courseid); + # + my $student_id = &get_student_id($sname,$sdom); + my $student = $sname.':'.$sdom; + # + my $returnstatus = 'okay'; + # + # Download students data + my $time_of_retrieval = time; + my @tmp = &Apache::lonnet::dumpstore($courseid,$sdom,$sname); + if (@tmp && $tmp[0] =~ /^error/) { + $returnstatus = 'error retrieving full student data'; + return $returnstatus; + } elsif (! @tmp) { + $returnstatus = 'okay: no student data'; + return $returnstatus; + } + my %studentdata = @tmp; + # + # Get database handle and clean out the tables + my $dbh = &Apache::lonmysql::get_dbh(); + $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='. + $student_id); + $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='. + $student_id); + $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='. + $student_id); + # + # Parse and store the data into a form we can handle + my $partdata; + my $respdata; + while (my ($key,$value) = each(%studentdata)) { + next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/); + my ($transaction,$symb,$parameter) = split(':',$key); + $symb = &unescape($symb); + $parameter = &unescape($parameter); + my $symb_id = &get_symb_id($symb); + if ($parameter eq 'timestamp') { + # We can deal with 'timestamp' right away + my @timestamp_storage = ($symb_id,$student_id, + $transaction,$value); + my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table. + " VALUES ('".join("','",@timestamp_storage)."');"; + $dbh->do($store_command); + if ($dbh->err()) { + &Apache::lonnet::logthis('unable to execute '.$store_command); + &Apache::lonnet::logthis($dbh->errstr()); + } + next; + } elsif ($parameter eq 'version') { + next; + } elsif (&symb_is_for_task($symb)) { + next if ($parameter !~ /^resource\.(.*)\.(award| + awarded| + solved| + submission| + portfiles| + status| + version| + regrader)\s*$/x); + my ($version_and_part_id, $field) = ($1,$2); + + next if ($version_and_part_id !~ /\./ + && $field ne 'regrader' && $field ne 'version'); + + my ($version, $part, $instance) = + split(/\./,$version_and_part_id); + + #skip and instance dimension or criteria specific data + next if (defined($instance) + && $instance ne $field + && $instance ne 'bridgetask'); + + if (!defined($part)) { + $part = $version; + } + my $resp_id = &get_part_id('0'); + my $part_id = &get_part_id($part); + + if ($field eq 'version') { + # for tasks each version is an attempt at it thus + # version -> tries + $partdata->{$symb_id}{$part_id}{$transaction}{'tries'}= + $value; + # at new version time the record gets reset thus adding a + # virtual response awarddetail of 'new_version' + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}='status'; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}='new_version'; + + } elsif ($field eq 'award' || $field eq 'awarded' + || $field eq 'solved') { + $partdata->{$symb_id}{$part_id}{$transaction}{$field}= + $value; + } elsif ($field eq 'portfiles') { + # tasks only accepts portfolio submissions + $value = $dbh->quote($value); + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'submission'}=$value; + } elsif ($field eq 'status') { + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}=$field; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}=$value; + } elsif ($field eq 'regrader') { + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_2'}=$field; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value_2'}=$value; + } + } elsif ($parameter =~ /^resource\.(.*)\.(tries| + award| + awarded| + previous| + solved| + awarddetail| + submission| + submissiongrading| + molecule)\s*$/x){ + # we do not have enough information to store an + # entire row, so we save it up until later. + my ($part_and_resp_id,$field) = ($1,$2); + my ($part,$part_id,$resp,$resp_id); + if ($part_and_resp_id =~ /\./) { + ($part,$resp) = split(/\./,$part_and_resp_id); + $part_id = &get_part_id($part); + $resp_id = &get_part_id($resp); + } else { + $part_id = &get_part_id($part_and_resp_id); + } + # Deal with part specific data + if ($field =~ /^(tries|award|awarded|previous)$/) { + $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value; + } + # deal with response specific data + if (defined($resp_id) && + $field =~ /^(awarddetail| + submission| + submissiongrading| + molecule)$/x) { + if ($field eq 'submission') { + # We have to be careful with user supplied input. + # most of the time we are okay because it is escaped. + # However, there is one wrinkle: submissions which end in + # and odd number of '\' cause insert errors to occur. + # Best trap this somehow... + $value = $dbh->quote($value); + } + if ($field eq 'submissiongrading' || + $field eq 'molecule') { + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field; + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value; + } else { + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value; + } + } + } + } + ## + ## Store the part data + my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table. + ' VALUES '."\n"; + my $store_rows = 0; + while (my ($symb_id,$hash1) = each (%$partdata)) { + while (my ($part_id,$hash2) = each (%$hash1)) { + while (my ($transaction,$data) = each (%$hash2)) { + $store_command .= "('".join("','",$symb_id,$part_id, + $student_id, + $transaction, + $data->{'tries'}, + $data->{'award'}, + $data->{'awarded'}, + $data->{'previous'})."'),"; + $store_rows++; + } + } + } + if ($store_rows) { + chop($store_command); + $dbh->do($store_command); + if ($dbh->err) { + $returnstatus = 'error storing part data'; + &Apache::lonnet::logthis('insert error '.$dbh->errstr()); + &Apache::lonnet::logthis("While attempting\n".$store_command); + } + } + ## + ## Store the response data + $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table. + ' VALUES '."\n"; + $store_rows = 0; + while (my ($symb_id,$hash1) = each (%$respdata)) { + while (my ($part_id,$hash2) = each (%$hash1)) { + while (my ($resp_id,$hash3) = each (%$hash2)) { + while (my ($transaction,$data) = each (%$hash3)) { + my $submission = $data->{'submission'}; + # We have to be careful with user supplied input. + # most of the time we are okay because it is escaped. + # However, there is one wrinkle: submissions which end in + # and odd number of '\' cause insert errors to occur. + # Best trap this somehow... + $submission = $dbh->quote($submission); + $store_command .= "('". + join("','",$symb_id,$part_id, + $resp_id,$student_id, + $transaction, + $data->{'awarddetail'}, + $data->{'response_specific'}, + $data->{'response_specific_value'}, + $data->{'response_specific_2'}, + $data->{'response_specific_value_2'}). + "',".$submission."),"; + $store_rows++; + } + } + } + } + if ($store_rows) { + chop($store_command); + $dbh->do($store_command); + if ($dbh->err) { + $returnstatus = 'error storing response data'; + &Apache::lonnet::logthis('insert error '.$dbh->errstr()); + &Apache::lonnet::logthis("While attempting\n".$store_command); + } + } + ## + ## Update the students "current" data in the performance + ## and parameters tables. + my ($status,undef) = &store_student_data + ($sname,$sdom,$courseid, + &Apache::lonnet::convert_dump_to_currentdump(\%studentdata)); + if ($returnstatus eq 'okay' && $status ne 'okay') { + $returnstatus = 'error storing current data:'.$status; + } elsif ($status ne 'okay') { + $returnstatus .= ' error storing current data:'.$status; + } + ## + ## Update the students time...... + if ($returnstatus eq 'okay') { + &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval); + if ($dbh->err) { + if ($returnstatus eq 'okay') { + $returnstatus = 'error updating student time'; + } else { + $returnstatus = 'error updating student time'; + } + } + } + return $returnstatus; +} + ################################################ ################################################ @@ -914,18 +1434,53 @@ sub update_student_data { # # Download students data my $time_of_retrieval = time; - my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname); - if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) { + my %student_data = &Apache::lonnet::currentdump($courseid,$sdom,$sname); + if (&Apache::lonnet::error(%student_data)) { &Apache::lonnet::logthis('error getting data for '. $sname.':'.$sdom.' in course '.$courseid. - ':'.$tmp[0]); - $returnstatus = 'error getting data'; + ':'.(%student_data)[0]); + $returnstatus =(%student_data)[0] ; return ($returnstatus,undef); } - if (scalar(@tmp) < 1) { + if (scalar(keys(%student_data)) < 1) { return ('no data',undef); } - my %student_data = @tmp; + my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data); + # + # Set the students update time + if ($Results[0] eq 'okay') { + &store_updatetime($student_id,$time_of_retrieval); + } + # + return @Results; +} + +sub store_updatetime { + my ($student_id,$updatetime,$fullupdatetime)=@_; + my $values = ''; + if (defined($updatetime)) { + $values = 'updatetime='.$updatetime.' '; + } + if (defined($fullupdatetime)) { + if ($values ne '') { + $values .= ','; + } + $values .= 'fullupdatetime='.$fullupdatetime.' '; + } + return if ($values eq ''); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'UPDATE '.$student_table.' SET '.$values. + ' WHERE student_id='.$student_id.' LIMIT 1'; + $dbh->do($request); +} + +sub store_student_data { + my ($sname,$sdom,$courseid,$student_data) = @_; + # + my $student_id = &get_student_id($sname,$sdom); + my $student = $sname.':'.$sdom; + # + my $returnstatus = 'okay'; # # Remove all of the students data from the table my $dbh = &Apache::lonmysql::get_dbh(); @@ -939,131 +1494,178 @@ sub update_student_data { my $starttime = Time::HiRes::time; my $elapsed = 0; my $rows_stored; - my $store_parameters_command = 'INSERT INTO '.$parameters_table. + my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table. ' VALUES '."\n"; my $num_parameters = 0; - my $store_performance_command = 'INSERT INTO '.$performance_table. + my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table. ' VALUES '."\n"; return ('error',undef) if (! defined($dbh)); - while (my ($current_symb,$param_hash) = each(%student_data)) { + while (my ($current_symb,$param_hash) = each(%{$student_data})) { # # make sure the symb is set up properly my $symb_id = &get_symb_id($current_symb); # - # Load data into the tables + # Parameters while (my ($parameter,$value) = each(%$param_hash)) { - my $newstring; if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) { - $newstring = "('".join("','", - $symb_id,$student_id, - $parameter)."',". - $dbh->quote($value)."),\n"; + my $sql_parameter = "('".join("','", + $symb_id,$student_id, + $parameter)."',". + $dbh->quote($value)."),\n"; $num_parameters ++; - if ($newstring !~ /''/) { - $store_parameters_command .= $newstring; - $rows_stored++; + if ($sql_parameter !~ /''/) { + $store_parameters_command .= $sql_parameter; + #$rows_stored++; } } - next if ($parameter !~ /^resource\.(.*)\.solved$/); + } + # Performance + my %stored; + while (my ($parameter,$value) = each(%$param_hash)) { + next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/); + my $part = $1; + my $which = $2; + next if ($part =~ /\./); + next if (exists($stored{$part})); + $stored{$part}++; # - my $part = $1; my $part_id = &get_part_id($part); next if (!defined($part_id)); - my $solved = $value; - my $tries = $param_hash->{'resource.'.$part.'.tries'}; - my $awarded = $param_hash->{'resource.'.$part.'.awarded'}; + + my ($solved,$awarded); + if ($which eq 'solved') { + $solved = $value; + $awarded = $param_hash->{'resource.'.$part.'.awarded'}; + } else { + $solved = $param_hash->{'resource.'.$part.'.solved'}; + $awarded = $value; + } my $award = $param_hash->{'resource.'.$part.'.award'}; my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'}; my $timestamp = $param_hash->{'timestamp'}; + my $tries = $param_hash->{'resource.'.$part.'.tries'}; + if (&symb_is_for_task($current_symb)) { + $tries = $param_hash->{'resource.'.$part.'.version'}; + } # $solved = '' if (! defined($solved)); $tries = '' if (! defined($tries)); $awarded = '' if (! defined($awarded)); $award = '' if (! defined($award)); $awarddetail = '' if (! defined($awarddetail)); - $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part, - $solved,$tries,$awarded,$award, - $awarddetail,$timestamp)."'),\n"; - $store_performance_command .= $newstring; + my $sql_performance = + "('".join("','",$symb_id,$student_id,$part_id,$part, + $solved,$tries,$awarded,$award, + $awarddetail,$timestamp)."'),\n"; + $store_performance_command .= $sql_performance; $rows_stored++; } } - chop $store_parameters_command; - chop $store_parameters_command; - chop $store_performance_command; - chop $store_performance_command; + if (! $rows_stored) { return ($returnstatus, undef); } + $store_parameters_command =~ s|,\n$||; + $store_performance_command =~ s|,\n$||; my $start = Time::HiRes::time; - $dbh->do($store_parameters_command) if ($num_parameters>0); - if ($dbh->err()) { - &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr()); - &Apache::lonnet::logthis('command = '.$store_parameters_command); - $returnstatus = 'error: unable to insert parameters into database'; - return ($returnstatus,\%student_data); - } $dbh->do($store_performance_command); if ($dbh->err()) { - &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr()); - &Apache::lonnet::logthis('command = '.$store_performance_command); + &Apache::lonnet::logthis('performance bigass insert error:'. + $dbh->errstr()); + &Apache::lonnet::logthis('command = '.$/.$store_performance_command); $returnstatus = 'error: unable to insert performance into database'; - return ($returnstatus,\%student_data); + return ($returnstatus,$student_data); + } + $dbh->do($store_parameters_command) if ($num_parameters>0); + if ($dbh->err()) { + &Apache::lonnet::logthis('parameters bigass insert error:'. + $dbh->errstr()); + &Apache::lonnet::logthis('command = '.$/.$store_parameters_command); + &Apache::lonnet::logthis('rows_stored = '.$rows_stored); + &Apache::lonnet::logthis('student_id = '.$student_id); + $returnstatus = 'error: unable to insert parameters into database'; + return ($returnstatus,$student_data); } $elapsed += Time::HiRes::time - $start; - # - # Set the students update time - &Apache::lonmysql::replace_row($updatetime_table, - [$student,$time_of_retrieval]); - return ($returnstatus,\%student_data); + return ($returnstatus,$student_data); } -################################################ -################################################ +###################################### +###################################### =pod -=item &ensure_current_data() +=item &ensure_tables_are_set_up($courseid) -Input: $sname, $sdom, $courseid +Checks to be sure the MySQL tables for the given class are set up. +If $courseid is omitted it will be obtained from the environment. -Output: $status, $data - -This routine ensures the data for a given student is up to date. It calls -&init_dbs() if the tables do not exist. The $updatetime_table is queried -to determine the time of the last update. If the students data is out of -date, &update_student_data() is called. The return values from the call -to &update_student_data() are returned. +Returns nothing on success and 'error' on failure =cut -################################################ -################################################ -sub ensure_current_data { - my ($sname,$sdom,$courseid) = @_; - my $status = 'okay'; # return value - # - $courseid = $ENV{'request.course.id'} if (! defined($courseid)); +###################################### +###################################### +sub ensure_tables_are_set_up { + my ($courseid) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); # # Clean out package variables &setup_table_names($courseid); # # if the tables do not exist, make them my @CurrentTable = &Apache::lonmysql::tables_in_db(); - my ($found_symb,$found_student,$found_part,$found_update, - $found_performance,$found_parameters); + my ($found_symb,$found_student,$found_groups,$found_groupnames,$found_part, + $found_performance,$found_parameters,$found_fulldump_part, + $found_fulldump_response,$found_fulldump_timestamp, + $found_weight); foreach (@CurrentTable) { $found_symb = 1 if ($_ eq $symb_table); $found_student = 1 if ($_ eq $student_table); + $found_groups = 1 if ($_ eq $students_groups_table); + $found_groupnames = 1 if ($_ eq $groupnames_table); $found_part = 1 if ($_ eq $part_table); - $found_update = 1 if ($_ eq $updatetime_table); $found_performance = 1 if ($_ eq $performance_table); $found_parameters = 1 if ($_ eq $parameters_table); - } - if (!$found_symb || !$found_update || - !$found_student || !$found_part || - !$found_performance || !$found_parameters) { - if (&init_dbs($courseid)) { - return ('error',undef); + $found_fulldump_part = 1 if ($_ eq $fulldump_part_table); + $found_fulldump_response = 1 if ($_ eq $fulldump_response_table); + $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table); + $found_weight = 1 if ($_ eq $weight_table); + } + if (!$found_symb || + !$found_student || !$found_part || + !$found_performance || !$found_parameters || + !$found_fulldump_part || !$found_fulldump_response || + !$found_fulldump_timestamp || !$found_weight ) { + if (&init_dbs($courseid,1)) { + return 'error'; } } +} + +################################################ +################################################ + +=pod + +=item &ensure_current_data() + +Input: $sname, $sdom, $courseid + +Output: $status, $data + +This routine ensures the data for a given student is up to date. +The $student_table is queried to determine the time of the last update. +If the students data is out of date, &update_student_data() is called. +The return values from the call to &update_student_data() are returned. + +=cut + +################################################ +################################################ +sub ensure_current_data { + my ($sname,$sdom,$courseid) = @_; + my $status = 'okay'; # return value + # + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &ensure_tables_are_set_up($courseid); # # Get the update time for the user my $updatetime = 0; @@ -1071,12 +1673,16 @@ sub ensure_current_data { ($sdom,$sname,$courseid.'.db', $Apache::lonnet::perlvar{'lonUsersDir'}); # - my $student = $sname.':'.$sdom; - my @Result = &Apache::lonmysql::get_rows($updatetime_table, - "student ='$student'"); + if ($modifiedtime == -1) { + return ('no data',undef); + } + + my $student_id = &get_student_id($sname,$sdom); + my @Result = &Apache::lonmysql::get_rows($student_table, + "student_id ='$student_id'"); my $data = undef; if (@Result) { - $updatetime = $Result[0]->[1]; + $updatetime = $Result[0]->[6]; # Ack! This is dumb! } if ($modifiedtime > $updatetime) { ($status,$data) = &update_student_data($sname,$sdom,$courseid); @@ -1089,6 +1695,54 @@ sub ensure_current_data { =pod +=item &ensure_current_full_data($sname,$sdom,$courseid) + +Input: $sname, $sdom, $courseid + +Output: $status + +This routine ensures the fulldata (the data from a lonnet::dump, not a +lonnet::currentdump) for a given student is up to date. +The $student_table is queried to determine the time of the last update. +If the students fulldata is out of date, &update_full_student_data() is +called. + +The return value from the call to &update_full_student_data() is returned. + +=cut + +################################################ +################################################ +sub ensure_current_full_data { + my ($sname,$sdom,$courseid) = @_; + my $status = 'okay'; # return value + # + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &ensure_tables_are_set_up($courseid); + # + # Get the update time for the user + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($sdom,$sname,$courseid.'.db', + $Apache::lonnet::perlvar{'lonUsersDir'}); + # + my $student_id = &get_student_id($sname,$sdom); + my @Result = &Apache::lonmysql::get_rows($student_table, + "student_id ='$student_id'"); + my $updatetime; + if (@Result && ref($Result[0]) eq 'ARRAY') { + $updatetime = $Result[0]->[7]; + } + if (! defined($updatetime) || $modifiedtime > $updatetime) { + $status = &update_full_student_data($sname,$sdom,$courseid); + } + return $status; +} + +################################################ +################################################ + +=pod + =item &get_student_data_from_performance_cache() Input: $sname, $sdom, $symb, $courseid @@ -1165,6 +1819,33 @@ sub get_student_data_from_performance_ca $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail; $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne ''); } + ## Get misc parameters + $request = 'SELECT c.symb,a.parameter,a.value '. + "FROM $student_table AS b ". + "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ". + "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ". + "WHERE student='$student'"; + if (defined($symb) && $symb ne '') { + $request .= " AND c.symb=".$dbh->quote($symb); + } + $sth = $dbh->prepare($request); + $sth->execute(); + if ($sth->err()) { + &Apache::lonnet::logthis("Unable to execute MySQL request:"); + &Apache::lonnet::logthis("\n".$request."\n"); + &Apache::lonnet::logthis("error is:".$sth->errstr()); + if (defined($symb) && $symb ne '') { + $studentdata = $studentdata->{$symb}; + } + return $studentdata; + } + # + foreach my $row (@{$sth->fetchall_arrayref}) { + $rows_retrieved++; + my ($symb,$parameter,$value) = (@$row); + $studentdata->{$symb}->{$parameter} = $value; + } + # if (defined($symb) && $symb ne '') { $studentdata = $studentdata->{$symb}; } @@ -1212,7 +1893,7 @@ an empty list is returned. sub get_current_state { my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_; # - $courseid = $ENV{'request.course.id'} if (! defined($courseid)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); # return () if (! defined($sname) || ! defined($sdom)); # @@ -1239,7 +1920,7 @@ sub get_current_state { } else { if ($status ne 'okay' && $status ne '') { &Apache::lonnet::logthis('status = '.$status); - return (); + return ('error: '.$status,undef); } my $returnhash = &get_student_data_from_performance_cache($sname,$sdom, $symb,$courseid); @@ -1260,12 +1941,18 @@ populated and all local caching variable properly. This means you need to call &ensure_current_data for the students you are concerned with prior to calling this routine. -Inputs: $students, $symb, $part, $courseid +Inputs: $Sections, Groups, $status, $symb, $part, $courseid, $starttime, + $endtime =over 4 -=item $students is an array of hash references. -Each hash must contain at least the 'username' and 'domain' of a student. +=item $Sections Array ref containing section names for students. +'all' is allowed to be the first (and only) item in the array. + +=item $Groups Array ref containing group names for students. +'all' is allowed to be the first (and only) item in the array. + +=item $status String describing the status of students =item $symb is the symb for the problem. @@ -1273,6 +1960,9 @@ Each hash must contain at least the 'use =item $courseid is the course id, of course! +=item $starttime and $endtime are unix times which to use to limit +the statistical data. + =back Outputs: See the code for up to date information. A hash reference is @@ -1308,108 +1998,146 @@ able to answer it correctly. ################################################ ################################################ sub get_problem_statistics { - my ($students,$symb,$part,$courseid) = @_; + my ($Sections,$Groups,$status,$symb,$part,$courseid,$starttime,$endtime) = @_; return if (! defined($symb) || ! defined($part)); - $courseid = $ENV{'request.course.id'} if (! defined($courseid)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); # + &setup_table_names($courseid); my $symb_id = &get_symb_id($symb); my $part_id = &get_part_id($part); - my $stats_table = $courseid.'_problem_stats'; + my $stats_table = &temp_table_name($courseid,'problem_stats'); # my $dbh = &Apache::lonmysql::get_dbh(); return undef if (! defined($dbh)); # - # A) Number of Students attempting problem - # B) Total number of tries of students attempting problem - # C) Mod (largest number of tries for solving the problem) - # D) Mean (average number of tries for solving the problem) - # E) Number of students to solve the problem - # F) Number of students to solve the problem by override - # G) Number of students unable to solve the problem - # H) Degree of difficulty : 1-(E+F)/B - # I) Standard deviation of number of tries - # J) Skew of tries: sqrt(sum(Xi-D)^3)/A - # + # Clean out the table $dbh->do('DROP TABLE '.$stats_table); # May return an error my $request = - 'CREATE TEMPORARY TABLE '.$stats_table. - ' SELECT student_id,solved,award,tries FROM '.$performance_table. - ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id; - if (defined($students)) { - $request .= ' AND ('. - join(' OR ', map {'student_id='. - &get_student_id($_->{'username'}, - $_->{'domain'}) - } @$students - ).')'; + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '. + 'FROM '.$performance_table.' AS a '; + # + # See if we need to include some requirements on the students + if ((defined($Sections) && lc($Sections->[0]) ne 'all') || + (defined($status) && lc($status) ne 'any')) { + $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b '; + } + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + if (defined($groups_join)) { + $request .= $groups_join; + } + $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id; + # + # Limit the students included to those specified + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$status,'b'); + # + # Limit by starttime and endtime + my $time_requirements = undef; + if (defined($starttime)) { + $time_requirements .= 'a.timestamp>='.$starttime; + if (defined($endtime)) { + $time_requirements .= ' AND a.timestamp<='.$endtime; + } + } elsif (defined($endtime)) { + $time_requirements .= 'a.timestamp<='.$endtime; } -# &Apache::lonnet::logthis($request); + if (defined($time_requirements)) { + $request .= ' AND '.$time_requirements; + } + if (defined($section_limits)) { + $request .= ' AND '.$section_limits; + } + if (defined($enrollment_limits)) { + $request .= ' AND '.$enrollment_limits; + } + # Limit by group, as required + if (defined($group_limits)) { + $request .= ' AND '.$group_limits; + } + # + # Finally, execute the request to create the temporary table $dbh->do($request); - my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request - ($dbh, - 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '. - $stats_table); - my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '. - $stats_table. - " WHERE solved='correct_by_student'"); - my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '. - $stats_table. - " WHERE solved='correct_by_override'"); + # + # Collect the first suite of statistics + $request = 'SELECT COUNT(*),SUM(tries),'. + 'AVG(tries),STD(tries) '. + 'FROM '.$stats_table; + my ($num,$tries,$mean,$STD) = &execute_SQL_request + ($dbh,$request); + # + $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table. + ' WHERE awarded>0'; + if (defined($time_requirements)) { + $request .= ' AND '.$time_requirements; + } + my ($max,$min) = &execute_SQL_request($dbh,$request); + # + $request = 'SELECT SUM(awarded) FROM '.$stats_table; + if (defined($time_requirements)) { + $request .= ' AND '.$time_requirements; + } + my ($Solved) = &execute_SQL_request($dbh,$request); + # + $request = 'SELECT SUM(awarded) FROM '.$stats_table. + " WHERE solved='correct_by_override'"; + if (defined($time_requirements)) { + $request .= ' AND '.$time_requirements; + } + my ($solved) = &execute_SQL_request($dbh,$request); + # + $Solved -= $solved; + # $num = 0 if (! defined($num)); $tries = 0 if (! defined($tries)); - $mod = 0 if (! defined($mod)); + $max = 0 if (! defined($max)); + $min = 0 if (! defined($min)); $STD = 0 if (! defined($STD)); - $Solved = 0 if (! defined($Solved)); + $Solved = 0 if (! defined($Solved) || $Solved < 0); $solved = 0 if (! defined($solved)); # + # Compute the more complicated statistics my $DegOfDiff = 'nan'; $DegOfDiff = 1-($Solved)/$tries if ($tries>0); - + # my $SKEW = 'nan'; my $wrongpercent = 0; + my $numwrong = 'nan'; if ($num > 0) { ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('. 'POWER(tries - '.$STD.',3)'. '))/'.$num.' FROM '.$stats_table); - $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; + $numwrong = $num-$Solved; + $wrongpercent=int(10*100*$numwrong/$num)/10; } # + # Drop the temporary table $dbh->do('DROP TABLE '.$stats_table); # May return an error # - # Store in metadata - # - if ($num) { - my %storestats=(); - - my $urlres=(split(/\_\_\_/,$symb))[2]; - - $storestats{$courseid.'___'.$urlres.'___timestamp'}=time; - $storestats{$courseid.'___'.$urlres.'___stdno'}=$num; - $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean; - $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff; - - $urlres=~/^(\w+)\/(\w+)/; - &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2); - } - # # Return result - # return { num_students => $num, tries => $tries, - max_tries => $mod, + max_tries => $max, + min_tries => $min, mean_tries => $mean, std_tries => $STD, skew_tries => $SKEW, num_solved => $Solved, num_override => $solved, + num_wrong => $numwrong, per_wrong => $wrongpercent, deg_of_diff => $DegOfDiff }; } +## +## This is a helper for get_statistics sub execute_SQL_request { my ($dbh,$request)=@_; # &Apache::lonnet::logthis($request); my $sth = $dbh->prepare($request); + if (!$sth) { + die($dbh->errstr . " SQL: $request"); + } $sth->execute(); my $row = $sth->fetchrow_arrayref(); if (ref($row) eq 'ARRAY' && scalar(@$row)>0) { @@ -1418,6 +2146,825 @@ sub execute_SQL_request { return (); } +###################################################### +###################################################### + +=pod + +=item &populate_weight_table + +=cut + +###################################################### +###################################################### +sub populate_weight_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $navmap = Apache::lonnavmaps::navmap->new(); + if (!defined($navmap)) { + &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/. + ' unable to get navmaps resource'.$/. + ' '.join(' ',(caller))); + return; + } + my @sequences = $navmap->retrieveResources(undef, + sub { shift->is_map(); },1,0,1); + my @resources; + foreach my $seq (@sequences) { + push(@resources,$navmap->retrieveResources($seq, + sub {shift->is_problem();}, + 0,0,0)); + } + if (! scalar(@resources)) { + &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/. + ' no resources returned for '.$courseid); + return; + } + # Since we use lonnet::EXT to retrieve problem weights, + # to ensure current data we must clear the caches out. + &Apache::lonnet::clear_EXT_cache_status(); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$weight_table. + "(symb_id,part_id,weight) VALUES "; + my $weight; + foreach my $res (@resources) { + my $symb_id = &get_symb_id($res->symb); + foreach my $part (@{$res->parts}) { + my $part_id = &get_part_id($part); + $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight', + $res->symb, + undef,undef,undef); + if (!defined($weight) || ($weight eq '')) { + $weight=1; + } + $request .= "('".$symb_id."','".$part_id."','".$weight."'),"; + } + } + $request =~ s/(,)$//; +# &Apache::lonnet::logthis('request = '.$/.$request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occured executing \n". + $request); + } + return; +} + +########################################################## +########################################################## + +=pod + +=item &limit_by_start_end_times + +Build SQL WHERE condition which limits the data collected by the start +and end times provided + +Inputs: $starttime, $endtime, $table + +Returns: $time_limits + +=cut + +########################################################## +########################################################## +sub limit_by_start_end_time { + my ($starttime,$endtime,$table) = @_; + my $time_requirements = undef; + if (defined($starttime)) { + $time_requirements .= $table.".timestamp>='".$starttime."'"; + if (defined($endtime)) { + $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'"; + } + } elsif (defined($endtime)) { + $time_requirements .= $table.".timestamp<='".$endtime."'"; + } + return $time_requirements; +} + +########################################################## +########################################################## + +=pod + +=item &limit_by_section_and_status + +Build SQL WHERE condition which limits the data collected by section and +student status. + +Inputs: $Sections (array ref) + $enrollment (string: 'any', 'expired', 'active') + $tablename The name of the table that holds the student data + +Returns: $student_requirements,$enrollment_requirements + +=cut + +########################################################## +########################################################## +sub limit_by_section_and_status { + my ($Sections,$enrollment,$tablename) = @_; + my $student_requirements = undef; + if ( (defined($Sections) && $Sections->[0] ne 'all')) { + $student_requirements = '('. + join(' OR ', map { $tablename.".section='".$_."'" } @$Sections + ).')'; + } + my $enrollment_requirements=undef; + if (defined($enrollment) && $enrollment ne 'Any') { + my $now = time(); + if ( $enrollment eq 'Future' ) { + $enrollment_requirements = + "( $tablename.start > $now AND ". + "( $tablename.end = 0 OR $tablename.end > $now))"; + } elsif ( $enrollment eq 'Active' ) { + $enrollment_requirements = + "(( $tablename.start = 0 OR $tablename.start < $now ) AND ". + " ( $tablename.end = 0 OR $tablename.end > $now ))"; + } elsif ( $enrollment eq 'Expired' ) { + $enrollment_requirements = + "(( $tablename.start < $now ) AND ". + " ( $tablename.end < $now ))"; + } + } + return ($student_requirements,$enrollment_requirements); +} + +###################################################### +###################################################### + +=pod + +=item &limit_by_group + +Build SQL LEFT JOIN statement to include students_groups and groupnames tables and SQL WHERE condition which limits the data collected by group. + +Inputs: $Groups (array ref) + $stutable The name of the table which holds the student data. + $grptable The name of the table which maps group_id to groupname. + $stugrptab The name of the table which holds student group affiliations. +Returns: $groups_join,$group_limits + $groups_join JOIN part of SQL statement (to include group related tables) + $group_limits SQL WHERE condition limiting to requested groups +=cut + +sub limit_by_group { + my ($Groups,$stutable,$grptable,$stugrptab) = @_; + my $groups_join = undef; + my $group_limits = undef; + if ( (defined($Groups) && $Groups->[0] ne 'all')) { + $groups_join = + ' LEFT JOIN '.$students_groups_table. + ' AS '.$stugrptab.' ON '. + $stugrptab.'.student_id = '.$stutable.'.student_id'. + ' LEFT JOIN '.$groupnames_table. + ' AS '.$grptable.' ON '. + $stugrptab.'.group_id = '.$grptable.'.group_id '; + $group_limits = + ' ('. + join(' OR ', map { "$grptable.groupname='".$_."'" } @$Groups + ).')'; + } + return ($groups_join,$group_limits); +} + +=pod + +=item rank_students_by_scores_on_resources + +Inputs: + $resources: array ref of hash ref. Each hash ref needs key 'symb'. + $Sections: array ref of sections to include, + $Groups: array ref of groups to include. + $enrollment: string, + $courseid (may be omitted) + $starttime (may be omitted) + $endtime (may be omitted) + $has_award_for (may be omitted) + +Returns; An array of arrays. The sub arrays contain a student name and +their score on the resources. $starttime and $endtime constrain the +list to awards obtained during the given time limits. $has_score_on +constrains the list to those students who at least attempted the +resource identified by the given symb, which is used to filter out +such students for statistics that would be adversely affected by such +students. + +=cut + +###################################################### +###################################################### +sub RNK_student { return 0; }; +sub RNK_score { return 1; }; + +sub rank_students_by_scores_on_resources { + my ($resources,$Sections,$Groups,$enrollment,$courseid,$starttime,$endtime, + $has_award_for) = @_; + return if (! defined($resources) || ! ref($resources) eq 'ARRAY'); + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_); + } @$resources + ).')'; + my ($award_col, $award_join, $award_clause) = ('', '', ''); + if ($has_award_for) { + my $resource_id = &get_symb_id($has_award_for); + $award_col = ", perf.awarded"; + $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id" + ." = $resource_id AND perf.student_id = b.student_id "; + $award_clause = "AND perf.awarded IS NOT NULL"; + } + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score " + ."$award_col FROM $performance_table AS a ". + "NATURAL LEFT JOIN $weight_table AS w ". + "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ". + "$award_join $groups_join "; + my $limits; + if (defined($section_limits)) { + $limits .= $section_limits.' AND '; + } + if (defined($enrollment_limits)) { + $limits .= $enrollment_limits.' AND '; + } + if (defined($time_limits)) { + $limits .= $time_limits.' AND '; + } + if ($symb_limits ne '()') { + $limits .= $symb_limits.' AND '; + } + if (defined($group_limits)) { + $limits .= $group_limits.' AND '; + } + if ($limits) { + $limits =~ s/( AND )$//; # Remove extra conjunction + $request .= "WHERE $limits"; + } + $request .= " $award_clause GROUP BY a.student_id ORDER BY score"; + #&Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request) or die "Can't prepare $request"; + $sth->execute(); + my $rows = $sth->fetchall_arrayref(); + return ($rows); +} + +######################################################## +######################################################## + +=pod + +=item &get_sum_of_scores + +Inputs: $resource (hash ref, needs {'symb'} key), +$part, (the part id), +$students (array ref, contents of array are scalars holding 'sname:sdom'), +$courseid + +Returns: the sum of the score on the problem part over the students and the + maximum possible value for the sum (taken from the weight table). + +=cut + +######################################################## +######################################################## +sub get_sum_of_scores { + my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + if (defined($students) && + ((@$students == 0) || + (@$students == 1 && (! defined($students->[0]) || + $students->[0] eq '')) + ) + ){ + undef($students); + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '. + $performance_table.' AS a '. + 'NATURAL LEFT JOIN '.$weight_table.' AS w '; + $request .= 'WHERE a.symb_id='.&get_symb_id($symb). + ' AND a.part_id='.&get_part_id($part); + if (defined($time_limits)) { + $request .= ' AND '.$time_limits; + } + if (defined($students)) { + $request .= ' AND ('. + join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_)); + } @$students). + ')'; + } + my $sth = $dbh->prepare($request); + $sth->execute(); + my $rows = $sth->fetchrow_arrayref(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 1 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'. + $/.$request); + return (undef,undef); + } + return ($rows->[0],$rows->[1]); +} + +######################################################## +######################################################## + +=pod + +=item &score_stats + +Inputs: $Sections, $enrollment, $symbs, $starttime, + $endtime, $courseid + +$Sections, $enrollment, $starttime, $endtime, and $courseid are the same as +elsewhere in this module. +$symbs is an array ref of symbs + +Returns: minimum, maximum, mean, s.d., number of students, and maximum + possible of student scores on the given resources + +=cut + +######################################################## +######################################################## +sub score_stats { + my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + # + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my @Symbids = map { &get_symb_id($_); } @{$symbs}; + # + my $stats_table = &temp_table_name($courseid,'problem_stats'); + my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids); + my $request = 'DROP TABLE '.$stats_table; + $dbh->do($request); + $request = + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,'. + 'SUM(a.awarded*w.weight) AS score FROM '. + $performance_table.' AS a '. + 'NATURAL LEFT JOIN '.$weight_table.' AS w '. + 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '. + $groups_join; + my $limit = ' WHERE ('.$symb_restriction.')'; + if ($time_limits) { + $limit .= ' AND '.$time_limits; + } + if ($section_limits) { + $limit .= ' AND '.$section_limits; + } + if ($enrollment_limits) { + $limit .= ' AND '.$enrollment_limits; + } + if ($group_limits) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' GROUP BY a.student_id'; +# &Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + $request = + 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '. + 'FROM '.$stats_table; + my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request); +# &Apache::lonnet::logthis('request = '.$/.$request); + + $request = 'SELECT SUM(weight) FROM '.$weight_table. + ' AS a WHERE ('.$symb_restriction.')'; + my ($max_possible) = &execute_SQL_request($dbh,$request); + # &Apache::lonnet::logthis('request = '.$/.$request); + return($min,$max,$ave,$std,$count,$max_possible); +} + + +######################################################## +######################################################## + +=pod + +=item &count_stats + +Inputs: $Sections, $Groups, $enrollment, $symbs, $starttime, + $endtime, $courseid + +$Sections, $Groups $enrollment, $starttime, $endtime, and $courseid are the +same as elsewhere in this module. +$symbs is an array ref of symbs + +Returns: minimum, maximum, mean, s.d., and number of students + of the number of items correct on the given resources + +=cut + +######################################################## +######################################################## +sub count_stats { + my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + # + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my @Symbids = map { &get_symb_id($_); } @{$symbs}; + # + my $stats_table = &temp_table_name($courseid,'problem_stats'); + my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids); + my $request = 'DROP TABLE '.$stats_table; + $dbh->do($request); + $request = + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,'. + 'SUM(a.awarded) AS count FROM '. + $performance_table.' AS a '. + 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '. + $groups_join; + my $limit = ' WHERE ('.$symb_restriction.')'; + if ($time_limits) { + $limit .= ' AND '.$time_limits; + } + if ($section_limits) { + $limit .= ' AND '.$section_limits; + } + if ($enrollment_limits) { + $limit .= ' AND '.$enrollment_limits; + } + if ($group_limits) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' GROUP BY a.student_id'; +# &Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + $request = + 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '. + 'FROM '.$stats_table; + my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request); +# &Apache::lonnet::logthis('request = '.$/.$request); + return($min,$max,$ave,$std,$count); +} + +###################################################### +###################################################### + +=pod + +=item get_student_data + +=cut + +###################################################### +###################################################### +sub get_student_data { + my ($students,$courseid) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my $request = 'SELECT '. + 'student_id, student '. + 'FROM '.$student_table; + if (defined($students)) { + $request .= ' WHERE ('. + join(' OR ', map {'student_id='. + &get_student_id($_->{'username'}, + $_->{'domain'}) + } @$students + ).')'; + } + $request.= ' ORDER BY student_id'; + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 2 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + return $dataset; + } +} + +sub RD_student_id { return 0; } +sub RD_awarddetail { return 1; } +sub RD_response_eval { return 2; } +sub RD_response_eval_2 { return 3; } +sub RD_submission { return 4; } +sub RD_timestamp { return 5; } +sub RD_tries { return 6; } +sub RD_sname { return 7; } + +sub get_response_data { + my ($Sections,$Groups,$enrollment,$symb,$response,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($response)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + if (! defined($symb_id)) { + &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid); + return undef; + } + my $response_id = &get_part_id($response); + if (! defined($response_id)) { + &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid); + return undef; + } + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + # + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($Sections,$enrollment,'d'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'d','e','f'); + my $request = 'SELECT '. + 'a.student_id, a.awarddetail, a.response_specific_value, '. + 'a.response_specific_value_2, a.submission, b.timestamp, '. + 'c.tries, d.student '. + 'FROM '.$fulldump_response_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$fulldump_part_table.' AS c '. + 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '. + 'a.part_id=c.part_id AND a.transaction = c.transaction '. + 'LEFT JOIN '.$student_table.' AS d '. + 'ON a.student_id=d.student_id '. + $groups_join; + my $limit = ' WHERE '. + 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id; + if (defined($student_requirements)) { + $limit .= ' AND '.$student_requirements; + } + if (defined($enrollment_requirements)) { + $limit .= ' AND '.$enrollment_requirements; + } + if (defined($group_limits)) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 3 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + # Clear the \'s from around the submission + for (my $i =0;$i[$i]->[&RD_submission()] =~ s/(\'$|^\')//g; + } + return $dataset; + } +} + + +sub RDs_awarddetail { return 3; } +sub RDs_submission { return 2; } +sub RDs_timestamp { return 1; } +sub RDs_tries { return 0; } +sub RDs_awarded { return 4; } +sub RDs_response_eval { return 5; } +sub RDs_response_eval_2 { return 6; } +sub RDs_part_award { return 7; } + +sub get_response_data_by_student { + my ($student,$symb,$response,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($response)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + my $response_id = &get_part_id($response); + # + my $student_id = &get_student_id($student->{'username'}, + $student->{'domain'}); + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my $request = 'SELECT '. + 'c.tries, b.timestamp, a.submission, a.awarddetail, c.awarded, '. + 'a.response_specific_value, a.response_specific_value_2, c.award '. + 'FROM '.$fulldump_response_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$fulldump_part_table.' AS c '. + 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '. + 'a.part_id=c.part_id AND a.transaction = c.transaction '. + 'LEFT JOIN '.$student_table.' AS d '. + 'ON a.student_id=d.student_id '. + 'LEFT JOIN '.$performance_table.' AS e '. + 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '. + 'a.student_id=e.student_id AND c.tries=e.tries '. + 'WHERE '. + 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id. + ' AND a.student_id='.$student_id.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 4 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + # Clear the \'s from around the submission + for (my $i =0;$i[$i]->[&RDs_submission] =~ s/(\'$|^\')//g; + } + return $dataset; + } + return undef; # error occurred +} + +sub RT_student_id { return 0; } +sub RT_awarded { return 1; } +sub RT_tries { return 2; } +sub RT_timestamp { return 3; } + +sub get_response_time_data { + my ($sections,$groups,$enrollment,$symb,$part,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($part)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + if (! defined($symb_id)) { + &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid); + return undef; + } + my $part_id = &get_part_id($part); + if (! defined($part_id)) { + &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid); + return undef; + } + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($sections,$enrollment,'d'); + my ($groups_join,$group_limits) = &limit_by_group($groups,'d','e','f'); + my $request = 'SELECT '. + 'a.student_id, a.awarded, a.tries, b.timestamp '. + 'FROM '.$fulldump_part_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$student_table.' as d '. + 'ON a.student_id=d.student_id '. + $groups_join; + my $limit = ' WHERE '. + 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id; + if (defined($student_requirements)) { + $limit .= ' AND '.$student_requirements; + } + if (defined($enrollment_requirements)) { + $limit .= ' AND '.$enrollment_requirements; + } + if (defined($group_limits)) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 5 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + return $dataset; + } + +} + +################################################ +################################################ + +=pod + +=item &get_student_scores($Sections,$Groups,$Symbs,$enrollment,$courseid) + +=cut + +################################################ +################################################ +sub get_student_scores { + my ($sections,$groups,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + return (undef) if (! defined($dbh)); + my $tmptable = &temp_table_name($courseid,'temp_'.time); + my $request = 'DROP TABLE IF EXISTS '.$tmptable; +# &Apache::lonnet::logthis('request = '.$/.$request); + $dbh->do($request); + # + my $symb_requirements; + if (defined($Symbs) && @$Symbs) { + $symb_requirements = '('. + join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}). + "' AND a.part_id='".&get_part_id($_->{'part'}). + "')" + } @$Symbs).')'; + } + # + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($sections,$enrollment,'b'); + # + my ($groups_join,$group_limits) = &limit_by_group($groups,'b','d','e'); + my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a'); + ## + $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable. + ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '. + $performance_table.' AS a '; + $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id '; + if (defined($student_requirements) || defined($enrollment_requirements)) { + $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '; + } + if (defined($groups_join)) { + $request .= $groups_join; + } + if (defined($symb_requirements) || + defined($student_requirements) || + defined($enrollment_requirements) || + defined($group_limits) ) { + $request .= ' WHERE '; + } + if (defined($symb_requirements)) { + $request .= $symb_requirements.' AND '; + } + if (defined($student_requirements)) { + $request .= $student_requirements.' AND '; + } + if (defined($enrollment_requirements)) { + $request .= $enrollment_requirements.' AND '; + } + if (defined($time_requirements)) { + $request .= $time_requirements.' AND '; + } + $request =~ s/ AND $//; # Strip of the trailing ' AND '. + $request .= ' GROUP BY a.student_id'; +# &Apache::lonnet::logthis("request = \n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 6 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score'; +# &Apache::lonnet::logthis("request = \n".$request); + $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 7 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + return $dataset; +} ################################################ ################################################ @@ -1439,7 +2986,7 @@ Cleans up the package variables for loca sub setup_table_names { my ($courseid) = @_; if (! defined($courseid)) { - $courseid = $ENV{'request.course.id'}; + $courseid = $env{'request.course.id'}; } # if (! defined($current_course) || $current_course ne $courseid) { @@ -1453,21 +3000,48 @@ sub setup_table_names { $have_read_student_table = 0; undef(%ids_by_student); undef(%students_by_id); + $have_read_groupnames_table = 0; + undef(%ids_by_groupname); # $current_course = $courseid; } # # Set up database names - my $base_id = $courseid; - $symb_table = $base_id.'_'.'symb'; - $part_table = $base_id.'_'.'part'; - $student_table = $base_id.'_'.'student'; - $updatetime_table = $base_id.'_'.'updatetime'; - $performance_table = $base_id.'_'.'performance'; - $parameters_table = $base_id.'_'.'parameters'; + my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid); + $symb_table = $base_id.'_'.'symb'; + $part_table = $base_id.'_'.'part'; + $student_table = $base_id.'_'.'student'; + $groupnames_table = $base_id.'_'.'groupnames'; + $students_groups_table = $base_id.'_'.'studentgroups'; + $performance_table = $base_id.'_'.'performance'; + $parameters_table = $base_id.'_'.'parameters'; + $fulldump_part_table = $base_id.'_'.'partdata'; + $fulldump_response_table = $base_id.'_'.'responsedata'; + $fulldump_timestamp_table = $base_id.'_'.'timestampdata'; + $weight_table = $base_id.'_'.'weight'; + # + @Tables = ( + $symb_table, + $part_table, + $student_table, + $groupnames_table, + $students_groups_table, + $performance_table, + $parameters_table, + $fulldump_part_table, + $fulldump_response_table, + $fulldump_timestamp_table, + $weight_table, + ); return; } +sub temp_table_name { + my ($courseid,$affix) = @_; + my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid); + return $base_id.'_'.$affix; +} + ################################################ ################################################ @@ -1482,8 +3056,8 @@ sub setup_table_names { ################################################ ################################################ +} # End scope of table identifiers -} ################################################ ################################################ @@ -1497,14 +3071,14 @@ Retrieve the classist of a given class o information is returned from the classlist.db file and, if needed, from the students environment. -Optional arguments are $cid, $cdom, and $cnum (course id, course domain, -and course number, respectively). Any omitted arguments will be taken -from the current environment ($ENV{'request.course.id'}, -$ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}). +Optional arguments are $cdom, and $cnum (course domain, +and course number, respectively). If either is ommitted the course +will be taken from the current environment ($env{'request.course.id'}, +$env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}). Returns a reference to a hash which contains: keys '$sname:$sdom' - values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status] + values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype] The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used as indices into the returned list to future-proof clients against @@ -1523,12 +3097,17 @@ sub CL_ID { return 4; } sub CL_SECTION { return 5; } sub CL_FULLNAME { return 6; } sub CL_STATUS { return 7; } +sub CL_TYPE { return 8; } +sub CL_LOCKEDTYPE { return 9; } sub get_classlist { - my ($cid,$cdom,$cnum) = @_; - $cid = $cid || $ENV{'request.course.id'}; - $cdom = $cdom || $ENV{'course.'.$cid.'.domain'}; - $cnum = $cnum || $ENV{'course.'.$cid.'.num'}; + my ($cdom,$cnum) = @_; + my $cid = $cdom.'_'.$cnum; + if (!defined($cdom) || !defined($cnum)) { + $cid = $env{'request.course.id'}; + $cdom = $env{'course.'.$cid.'.domain'}; + $cnum = $env{'course.'.$cid.'.num'}; + } my $now = time; # my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum); @@ -1539,9 +3118,9 @@ sub get_classlist { } my ($sname,$sdom) = split(/:/,$student); my @Values = split(/:/,$info); - my ($end,$start,$id,$section,$fullname); + my ($end,$start,$id,$section,$fullname,$type,$lockedtype); if (@Values > 2) { - ($end,$start,$id,$section,$fullname) = @Values; + ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values; } else { # We have to get the data ourselves ($end,$start) = @Values; $section = &Apache::lonnet::getsection($sdom,$sname,$cid); @@ -1556,14 +3135,13 @@ sub get_classlist { &Apache::lonnet::logthis('unable to retrieve environment '. 'for '.$sname.':'.$sdom); } else { - $fullname = &ProcessFullName(@info{qw/lastname generation - firstname middlename/}); + $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname'); $id = $info{'id'}; } # Update the classlist with this students information if ($fullname ne 'not available') { - my $enrolldata = join(':',$end,$start,$id,$section,$fullname); - my $reply=&Apache::lonnet::cput('classlist', + my $enrolldata = join(':',$end,$start,$id,$section,$fullname); + my $reply=&Apache::lonnet::cput('classlist', {$student => $enrolldata}, $cdom,$cnum); if ($reply !~ /^(ok|delayed)/) { @@ -1577,20 +3155,110 @@ sub get_classlist { if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) { $status='Active'; } + if(($now < $start) && ((!$end) || $now < $end )) { + $status='Future'; + } $classlist{$student} = - [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]; + [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]; } if (wantarray()) { return (\%classlist,['domain','username','end','start','id', - 'section','fullname','status']); + 'section','fullname','status','type','lockedtype']); } else { return \%classlist; } } +sub get_group_memberships { + my ($classlist,$keylist,$cdom,$cnum) = @_; + + return ({},{}) if (!ref($classlist) || !ref($keylist)); + + my $cid = $cdom.'_'.$cnum; + if (!defined($cdom) || !defined($cnum)) { + $cid = $env{'request.course.id'}; + $cdom = $env{'course.'.$cid.'.domain'}; + $cnum = $env{'course.'.$cid.'.num'}; + } + my (%classgroups,%studentgroups); + my $now = time; + my $access_end = $env{'course.'.$cid.'.default_enrollment_end_date'}; + my %curr_groups =&Apache::longroup::coursegroups($cdom,$cnum); + if (%curr_groups) { + my $grpindex = scalar(@{$keylist}); + my %groupmemberhash = + &Apache::lonnet::get_group_membership($cdom,$cnum); + foreach my $student (keys(%{$classlist})) { + %{$classgroups{$student}} = (); + my $hasgroup = 0; + foreach my $status ('previous','future','active','aftercourse') { + %{$classgroups{$student}{$status}} = (); + } + foreach my $group (keys(%curr_groups)) { + if (defined($groupmemberhash{$group.':'.$student})) { + my ($end,$start) = split(/:/,$groupmemberhash{$group.':'. + $student}); + if ($start == -1) { + next; + } else { + $studentgroups{$group} ++; + $hasgroup = 1; + if ($end && $end < $now) { + $classgroups{$student}{'previous'}{$group} = + $groupmemberhash{$group.':'.$student}; + if ($classlist->{$student}[&CL_STATUS()] eq 'Expired') { + if ($access_end && $access_end < $now) { + if ($access_end - $end < 86400) { + $classgroups{$student}{'aftercourse'}{$group} = $groupmemberhash{$group.':'.$student}; + } + } + } + } elsif ($now > $start) { + if (!$end || $end > $now) { + $classgroups{$student}{'active'}{$group} = + $groupmemberhash{$group.':'.$student}; + } + } else { + $classgroups{$student}{'future'}{$group} = + $groupmemberhash{$group.':'.$student}; + } + } + } + } + if (!$hasgroup) { + $studentgroups{'none'} ++; + } else { + $classlist->{$student}->[$grpindex] = join(',', + sort(keys(%{$classgroups{$student}{'active'}}))); + } + } + } + return (\%classgroups,\%studentgroups); +} + +sub get_students_groups { + my ($student,$enrollment_status,$classgroups) = @_; + my @studentsgroups = (); + if (ref($$classgroups{$student}{'active'}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{'active'}})); + } + if ($enrollment_status eq 'Any') { + foreach my $status ('previous','future') { + if (ref($$classgroups{$student}{$status}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{$status}})); + } + } + } else { + if (ref($$classgroups{$student}{'aftercourse'}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{'aftercourse'}})); + } + } + return @studentsgroups; +} + + # ----- END HELPER FUNCTIONS -------------------------------------------- 1; __END__ -