--- loncom/interface/loncoursedata.pm 2002/07/25 19:31:32 1.5
+++ loncom/interface/loncoursedata.pm 2004/04/06 19:02:00 1.131
@@ -1,7 +1,6 @@
# The LearningOnline Network with CAPA
-# (Publication Handler
#
-# $Id: loncoursedata.pm,v 1.5 2002/07/25 19:31:32 minaeibi Exp $
+# $Id: loncoursedata.pm,v 1.131 2004/04/06 19:02:00 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -35,12 +34,13 @@ loncoursedata
=head1 SYNOPSIS
-Set of functions that download and process student information.
+Set of functions that download and process student and course information.
=head1 PACKAGES USED
Apache::Constants qw(:common :http)
Apache::lonnet()
+ Apache::lonhtmlcommon
HTML::TokeParser
GDBM_File
@@ -51,6 +51,9 @@ 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;
@@ -58,739 +61,2900 @@ use GDBM_File;
=head1 DOWNLOAD INFORMATION
-This section contains all the files that get data from other servers
-and/or itself. There is one function that has a call to get remote
-information but isn't included here which is ProcessTopLevelMap. The
-usage was small enough to be ignored, but that portion may be moved
-here in the future.
+This section contains all the functions that get data from other servers
+and/or itself.
=cut
-# ----- DOWNLOAD INFORMATION -------------------------------------------
+####################################################
+####################################################
=pod
-=item &DownloadClasslist()
+=item &get_sequence_assessment_data()
-Collects lastname, generation, middlename, firstname, PID, and section for each
-student from their environment database. The list of students is built from
-collecting a classlist for the course that is to be displayed.
+Use lonnavmaps to build a data structure describing the order and
+assessment contents of each sequence in the current course.
-=over 4
+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
+}
-Input: $courseID, $c
+$hash->{'contents'} is a reference to an array of hashes of the same structure.
-$courseID: The id of the course
+Also returned are array references to the sequences and assessments contained
+in the course.
-$c: The connection class that can determine if the browser has aborted. It
-is used to short circuit this function so that it doesn't continue to
-get information when there is no need.
-Output: \%classlist
+=cut
+
+####################################################
+####################################################
+sub get_sequence_assessment_data {
+ my $fn=$ENV{'request.course.fn'};
+ ##
+ ## use navmaps
+ my $navmap = Apache::lonnavmaps::navmap->new();
+ if (!defined($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();
+ $title =~ s/\:/\&\#058;/g;
+ $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() && $curRes->src() !~ /\.survey$/);
+ # Okay, from here on out we only deal with assessments
+ $title = $curRes->title();
+ $title =~ s/\:/\&\#058;/g;
+ $symb = $curRes->symb();
+ $src = $curRes->src();
+ # Grab the filename if there is not title available
+ if (! defined($title) || $title eq '') {
+ ($title) = ($src=~ m:/([^/]*)$:);
+ }
+ my $parts = $curRes->parts();
+ my %partdata;
+ foreach my $part (@$parts) {
+ my @Responses = $curRes->responseType($part);
+ my @Ids = $curRes->responseIds($part);
+ $partdata{$part}->{'ResponseTypes'}= \@Responses;
+ $partdata{$part}->{'ResponseIds'} = \@Ids;
+ # Count how many responses of each type there are in this part
+ foreach (@Responses) {
+ $partdata{$part}->{$_}++;
+ }
+ }
+ my $assessment = { title => $title,
+ src => $src,
+ symb => $symb,
+ type => 'assessment',
+ parts => $parts,
+ num_parts => scalar(@$parts),
+ partdata => \%partdata,
+ };
+ 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;
+}
-\%classlist: A pointer to a hash containing the following data:
+################################################
+################################################
--A list of student name:domain (as keys) (known below as $name)
+=pod
--A hash pointer for each student containing lastname, generation, firstname,
-middlename, and PID : Key is $name.'studentInformation'
+=item &GetUserName(username,userdomain)
--A hash pointer to each students section data : Key is $name.section
+Returns a hash with the following entries:
+ 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
-=back
+ 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
=cut
-sub DownloadClasslist {
- my ($courseID, $lastDownloadTime, $c)=@_;
- my ($courseDomain,$courseNumber)=split(/\_/,$courseID);
- my %classlist;
-
-# my $modifiedTime = &GetFileTimestamp($courseDomain, $courseNumber,
-# 'classlist.db',
-# $Apache::lonnet::perlvar{'lonUsersDir'});
-
-# if($lastDownloadTime ne 'Not downloaded' &&
-# $lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) {
-# $classlist{'lastDownloadTime'}=time;
-# $classlist{'UpToDate'} = 'true';
-# return \%classlist;
-# }
+################################################
+################################################
+sub GetUserName {
+ my ($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'},
+ $userenv{'middlename'});
+ return %userenv;
+}
- %classlist=&Apache::lonnet::dump('classlist',$courseDomain, $courseNumber);
- my ($checkForError)=keys (%classlist);
- if($checkForError =~ /^(con_lost|error|no_such_host)/i) {
- return \%classlist;
- }
+################################################
+################################################
- foreach my $name (keys(%classlist)) {
- if($c->aborted()) {
- $classlist{'error'}='aborted';
- return \%classlist;
- }
+=pod
- my ($studentName,$studentDomain) = split(/\:/,$name);
- # Download student environment data, specifically the full name and id.
- my %studentInformation=&Apache::lonnet::get('environment',
- ['lastname','generation',
- 'firstname','middlename',
- 'id'],
- $studentDomain,
- $studentName);
- $classlist{$name.':studentInformation'}=\%studentInformation;
+=item &ProcessFullName()
- if($c->aborted()) {
- $classlist{'error'}='aborted';
- return \%classlist;
- }
+Takes lastname, generation, firstname, and middlename (or some partial
+set of this data) and returns the full name version as a string. Format
+is Lastname generation, firstname middlename or a subset of this.
+
+=cut
+
+################################################
+################################################
+sub ProcessFullName {
+ my ($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;
- #Section
- my %section=&Apache::lonnet::dump('roles',$studentDomain,$studentName);
- $classlist{$name.':sections'}=\%section;
+ 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 '');
}
- $classlist{'UpToDate'} = 'false';
- $classlist{'lastDownloadTime'}=time;
+ return $Str;
+}
+
+################################################
+################################################
+
+=pod
+
+=item &make_into_hash($values);
- return \%classlist;
+Returns a reference to a hash as described by $values. $values is
+assumed to be the result of
+ join(':',map {&Apache::lonnet::escape($_)} %orighash);
+
+This is a helper function for get_current_state.
+
+=cut
+
+################################################
+################################################
+sub make_into_hash {
+ my $values = shift;
+ my %tmp = map { &Apache::lonnet::unescape($_); }
+ split(':',$values);
+ return \%tmp;
}
+
+################################################
+################################################
+
=pod
-=item &DownloadCourseInformation()
+=head1 LOCAL DATA CACHING SUBROUTINES
+
+The local caching is done using MySQL. There is no fall-back implementation
+if MySQL is not running.
+
+The programmers interface is to call &get_current_state() or some other
+primary interface subroutine (described below). The internals of this
+storage system are documented here.
+
+There are six tables used to store student performance data (the results of
+a dumpcurrent). Each of these tables is created in MySQL with a name of
+$courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
+for the table. The tables and their purposes are described below.
+
+Some notes before we get started.
+
+Each table must have a PRIMARY KEY, which is a column or set of columns which
+will serve to uniquely identify a row of data. NULL is not allowed!
+
+INDEXes work best on integer data.
+
+JOIN is used to combine data from many tables into one output.
+
+lonmysql.pm is used for some of the interface, specifically the table creation
+calls. The inserts are done in bulk by directly calling the database handler.
+The SELECT ... JOIN statement used to retrieve the data does not have an
+interface in lonmysql.pm and I shudder at the thought of writing one.
+
+=head3 Table Descriptions
+
+=over 4
+
+=item Tables used to store meta information
-Dump of all the course information for a single student. There is no
-pruning of data, it is all stored in a hash and returned. It also
-checks the timestamp of the students course database file and only downloads
-if it has been modified since the last download.
+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
-Input: $name, $courseID
+=item $symb_table
-$name: student name:domain
+The symb_table has two columns. The first is a 'symb_id' and the second
+is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
+automatically by MySQL so inserts should be done on this table with an
+empty first element. This table has its PRIMARY KEY on the 'symb_id'.
-$courseID: The id of the course
+=item $part_table
-Output: \%courseData
+The part_table has two columns. The first is a 'part_id' and the second
+is the text name for the 'part' (limited to 100 characters). The 'part_id' is
+generated automatically by MySQL so inserts should be done on this table with
+an empty first element. This table has its PRIMARY KEY on the 'part' (100
+characters) and a KEY on 'part_id'.
-\%courseData: A hash pointer to the raw data from the student's course
-database.
+=item $student_table
+
+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'.
+
+=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
+
+The performance_table has 9 columns. The first three are 'symb_id',
+'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
+and are directly related to the $symb_table, $student_table, and $part_table
+described above. MySQL does better indexing on numeric items than text,
+so we use these three "index tables". The remaining columns are
+'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
+These are either the MySQL type TINYTEXT or various integers ('tries' and
+'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
+For use of this table, see the functions described below.
+
+=item $parameters_table
+
+The parameters_table holds the data that does not fit neatly into the
+performance_table. The parameters table has four columns: 'symb_id',
+'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
+'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
+limited to 255 characters. 'value' is limited to 64k characters.
=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' (data particular to the response
+type), 'response_specific_value', 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 $weight_table
+
+The weight table holds the weight for the problems used in the class.
+Whereas the weight of a problem can vary by section and student the data
+here is applied to the class as a whole.
+Columns: 'symb_id','part_id','response_id','weight'.
+
+=back
+
+=back
+
+=head3 Important Subroutines
+
+Here is a brief overview of the subroutines which are likely to be of
+interest:
+
+=over 4
+
+=item &get_current_state(): programmers interface.
+
+=item &init_dbs(): table creation
+
+=item &update_student_data(): data storage calls
+
+=item &get_student_data_from_performance_cache(): data retrieval
+
+=back
+
+=head3 Main Documentation
+
+=over 4
+
=cut
-sub DownloadCourseInformation {
- my ($namedata,$courseID,$lastDownloadTime)=@_;
- my %courseData;
- my ($name,$domain) = split(/\:/,$namedata);
-
-# my $modifiedTime = &GetFileTimestamp($domain, $name,
-# $courseID.'.db',
-# $Apache::lonnet::perlvar{'lonUsersDir'});
-# if($lastDownloadTime >= $modifiedTime) {
-# $courseData{'lastDownloadTime'}=time;
-# $courseData{'UpToDate'} = 'true';
-# return \%courseData;
-# }
+################################################
+################################################
+
+################################################
+################################################
+{ # Begin scope of table identifiers
+
+my $current_course ='';
+my $symb_table;
+my $part_table;
+my $student_table;
+my $performance_table;
+my $parameters_table;
+my $fulldump_response_table;
+my $fulldump_part_table;
+my $fulldump_timestamp_table;
+my $weight_table;
+
+my @Tables;
+################################################
+################################################
+
+=pod
+
+=item &init_dbs()
+
+Input: course id
+
+Output: 0 on success, positive integer on error
+
+This routine issues the calls to lonmysql to create the tables used to
+store student data.
+
+=cut
+
+################################################
+################################################
+sub init_dbs {
+ my $courseid = shift;
+ &setup_table_names($courseid);
+ #
+ # Drop any of the existing tables
+ foreach my $table (@Tables) {
+ &Apache::lonmysql::drop_table($table);
+ }
+ #
+ # Note - changes to this table must be reflected in the code that
+ # stores the data (calls &Apache::lonmysql::store_row with this table
+ # id
+ my $symb_table_def = {
+ id => $symb_table,
+ permanent => 'no',
+ columns => [{ name => 'symb_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL',
+ auto_inc => 'yes', },
+ { name => 'symb',
+ type => 'MEDIUMTEXT',
+ restrictions => 'NOT NULL'},
+ ],
+ 'PRIMARY KEY' => ['symb_id'],
+ };
+ #
+ my $part_table_def = {
+ id => $part_table,
+ permanent => 'no',
+ columns => [{ name => 'part_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL',
+ auto_inc => 'yes', },
+ { name => 'part',
+ type => 'VARCHAR(100)',
+ restrictions => 'NOT NULL'},
+ ],
+ 'PRIMARY KEY' => ['part (100)'],
+ 'KEY' => [{ columns => ['part_id']},],
+ };
+ #
+ my $student_table_def = {
+ id => $student_table,
+ permanent => 'no',
+ columns => [{ name => 'student_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL',
+ auto_inc => 'yes', },
+ { name => 'student',
+ type => 'VARCHAR(100)',
+ restrictions => 'NOT NULL UNIQUE'},
+ { name => 'section',
+ type => 'VARCHAR(100)',
+ restrictions => 'NOT NULL'},
+ { name => 'status',
+ type => 'VARCHAR(15)',
+ restrictions => 'NOT NULL'},
+ { name => 'classification',
+ type => 'varchar(100)', },
+ { name => 'updatetime',
+ type => 'INT UNSIGNED'},
+ { name => 'fullupdatetime',
+ type => 'INT UNSIGNED'},
+ ],
+ 'PRIMARY KEY' => ['student_id'],
+ 'KEY' => [{ columns => ['student (100)',
+ 'section (100)',
+ 'status (15)',]},],
+ };
+ #
+ my $performance_table_def = {
+ id => $performance_table,
+ permanent => 'no',
+ columns => [{ name => 'symb_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL' },
+ { name => 'student_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL' },
+ { name => 'part_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL' },
+ { name => 'part',
+ type => 'VARCHAR(100)',
+ restrictions => 'NOT NULL'},
+ { name => 'solved',
+ type => 'TINYTEXT' },
+ { name => 'tries',
+ type => 'SMALLINT UNSIGNED' },
+ { name => 'awarded',
+ type => 'REAL' },
+ { name => 'award',
+ type => 'TINYTEXT' },
+ { name => 'awarddetail',
+ type => 'TINYTEXT' },
+ { name => 'timestamp',
+ type => 'INT UNSIGNED'},
+ ],
+ 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
+ 'KEY' => [{ columns=>['student_id'] },
+ { 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' },
+ { name => 'response_specific',
+ type => 'TINYTEXT' },
+ { name => 'response_specific_value',
+ 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',
+ columns => [{ name => 'symb_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL' },
+ { name => 'student_id',
+ type => 'MEDIUMINT UNSIGNED',
+ restrictions => 'NOT NULL' },
+ { name => 'parameter',
+ type => 'TINYTEXT',
+ restrictions => 'NOT NULL' },
+ { name => 'value',
+ type => 'MEDIUMTEXT' },
+ ],
+ '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);
+ if (! defined($tableid)) {
+ &Apache::lonnet::logthis("error creating symb_table: ".
+ &Apache::lonmysql::get_error());
+ return 1;
+ }
+ #
+ $tableid = &Apache::lonmysql::create_table($part_table_def);
+ if (! defined($tableid)) {
+ &Apache::lonnet::logthis("error creating part_table: ".
+ &Apache::lonmysql::get_error());
+ return 2;
+ }
+ #
+ $tableid = &Apache::lonmysql::create_table($student_table_def);
+ if (! defined($tableid)) {
+ &Apache::lonnet::logthis("error creating student_table: ".
+ &Apache::lonmysql::get_error());
+ return 3;
+ }
+ #
+ $tableid = &Apache::lonmysql::create_table($performance_table_def);
+ if (! defined($tableid)) {
+ &Apache::lonnet::logthis("error creating preformance_table: ".
+ &Apache::lonmysql::get_error());
+ return 5;
+ }
+ #
+ $tableid = &Apache::lonmysql::create_table($parameters_table_def);
+ if (! defined($tableid)) {
+ &Apache::lonnet::logthis("error creating parameters_table: ".
+ &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($tableid)) {
+ &Apache::lonnet::logthis("error creating weight_table: ".
+ &Apache::lonmysql::get_error());
+ return 10;
+ }
+ return 0;
+}
+
+################################################
+################################################
+
+=pod
- # Download course data
- %courseData=&Apache::lonnet::dump($courseID, $domain, $name);
- $courseData{'UpToDate'} = 'false';
- $courseData{'lastDownloadTime'}=time;
- return \%courseData;
+=item &delete_caches()
+
+=cut
+
+################################################
+################################################
+sub delete_caches {
+ my $courseid = shift;
+ $courseid = $ENV{'request.course.id'} if (! defined($courseid));
+ #
+ &setup_table_names($courseid);
+ #
+ my $dbh = &Apache::lonmysql::get_dbh();
+ foreach my $table (@Tables) {
+ my $command = 'DROP TABLE '.$table.';';
+ $dbh->do($command);
+ if ($dbh->err) {
+ &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
+ }
+ }
+ return;
}
-# ----- END DOWNLOAD INFORMATION ---------------------------------------
+################################################
+################################################
=pod
-=head1 PROCESSING FUNCTIONS
+=item &get_part_id()
+
+Get the MySQL id of a problem part string.
+
+Input: $part
+
+Output: undef on error, integer $part_id on success.
-These functions process all the data for all the students. Also, they
-are the only functions that access the cache database for writing. Thus
-they are the only functions that cache data. The downloading and caching
-were separated to reduce problems with stopping downloading then can't
-tie hash to database later.
+=item &get_part()
+
+Get the string describing a part from the MySQL id of the problem part.
+
+Input: $part_id
+
+Output: undef on error, $part string on success.
=cut
-# ----- PROCESSING FUNCTIONS ---------------------------------------
+################################################
+################################################
+
+my $have_read_part_table = 0;
+my %ids_by_part;
+my %parts_by_id;
+
+sub get_part_id {
+ my ($part) = @_;
+ $part = 0 if (! defined($part));
+ if (! $have_read_part_table) {
+ my @Result = &Apache::lonmysql::get_rows($part_table);
+ foreach (@Result) {
+ $ids_by_part{$_->[1]}=$_->[0];
+ }
+ $have_read_part_table = 1;
+ }
+ if (! exists($ids_by_part{$part})) {
+ &Apache::lonmysql::store_row($part_table,[undef,$part]);
+ undef(%ids_by_part);
+ my @Result = &Apache::lonmysql::get_rows($part_table);
+ foreach (@Result) {
+ $ids_by_part{$_->[1]}=$_->[0];
+ }
+ }
+ return $ids_by_part{$part} if (exists($ids_by_part{$part}));
+ return undef; # error
+}
+
+sub get_part {
+ my ($part_id) = @_;
+ if (! exists($parts_by_id{$part_id}) ||
+ ! defined($parts_by_id{$part_id}) ||
+ $parts_by_id{$part_id} eq '') {
+ my @Result = &Apache::lonmysql::get_rows($part_table);
+ foreach (@Result) {
+ $parts_by_id{$_->[0]}=$_->[1];
+ }
+ }
+ return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
+ return undef; # error
+}
+
+################################################
+################################################
=pod
-=item &ProcessTopResourceMap()
+=item &get_symb_id()
-Trace through the "big hash" created in rat/lonuserstate.pm::loadmap.
-Basically, this function organizes a subset of the data and stores it in
-cached data. The data stored is the problems, sequences, sequence titles,
-parts of problems, and their ordering. Column width information is also
-partially handled here on a per sequence basis.
+Get the MySQL id of a symb.
-=over 4
+Input: $symb
-Input: $cache, $c
+Output: undef on error, integer $symb_id on success.
-$cache: A pointer to a hash to store the information
+=item &get_symb()
-$c: The connection class used to determine if an abort has been sent to the
-browser
+Get the symb associated with a MySQL symb_id.
-Output: A string that contains an error message or "OK" if everything went
-smoothly.
+Input: $symb_id
-=back
+Output: undef on error, $symb on success.
=cut
-sub ProcessTopResourceMap {
- my ($cache,$c)=@_;
- my %hash;
- my $fn=$ENV{'request.course.fn'};
- if(-e "$fn.db") {
- my $tieTries=0;
- while($tieTries < 3) {
- if($c->aborted()) {
- return;
- }
- if(tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
- last;
- }
- $tieTries++;
- sleep 1;
- }
- if($tieTries >= 3) {
- return 'Coursemap undefined.';
+################################################
+################################################
+
+my $have_read_symb_table = 0;
+my %ids_by_symb;
+my %symbs_by_id;
+
+sub get_symb_id {
+ my ($symb) = @_;
+ if (! $have_read_symb_table) {
+ my @Result = &Apache::lonmysql::get_rows($symb_table);
+ foreach (@Result) {
+ $ids_by_symb{$_->[1]}=$_->[0];
+ }
+ $have_read_symb_table = 1;
+ }
+ if (! exists($ids_by_symb{$symb})) {
+ &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
+ undef(%ids_by_symb);
+ my @Result = &Apache::lonmysql::get_rows($symb_table);
+ foreach (@Result) {
+ $ids_by_symb{$_->[1]}=$_->[0];
}
- } else {
- return 'Can not open Coursemap.';
}
+ return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
+ return undef; # error
+}
- # Initialize state machine. Set information pointing to top level map.
- my (@sequences, @currentResource, @finishResource);
- my ($currentSequence, $currentResourceID, $lastResourceID);
-
- $currentResourceID=$hash{'ids_/res/'.$ENV{'request.course.uri'}};
- push(@currentResource, $currentResourceID);
- $lastResourceID=-1;
- $currentSequence=-1;
- my $topLevelSequenceNumber = $currentSequence;
-
- while(1) {
- if($c->aborted()) {
- last;
- }
- # HANDLE NEW SEQUENCE!
- #if page || sequence
- if(defined($hash{'map_pc_'.$hash{'src_'.$currentResourceID}})) {
- push(@sequences, $currentSequence);
- push(@currentResource, $currentResourceID);
- push(@finishResource, $lastResourceID);
-
- $currentSequence=$hash{'map_pc_'.$hash{'src_'.$currentResourceID}};
-
- # Mark sequence as containing problems. If it doesn't, then
- # it will be removed when processing for this sequence is
- # complete. This allows the problems in a sequence
- # to be outputed before problems in the subsequences
- if(!defined($cache->{'orderedSequences'})) {
- $cache->{'orderedSequences'}=$currentSequence;
- } else {
- $cache->{'orderedSequences'}.=':'.$currentSequence;
- }
+sub get_symb {
+ my ($symb_id) = @_;
+ if (! exists($symbs_by_id{$symb_id}) ||
+ ! defined($symbs_by_id{$symb_id}) ||
+ $symbs_by_id{$symb_id} eq '') {
+ my @Result = &Apache::lonmysql::get_rows($symb_table);
+ foreach (@Result) {
+ $symbs_by_id{$_->[0]}=$_->[1];
+ }
+ }
+ return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
+ return undef; # error
+}
- $lastResourceID=$hash{'map_finish_'.
- $hash{'src_'.$currentResourceID}};
- $currentResourceID=$hash{'map_start_'.
- $hash{'src_'.$currentResourceID}};
-
- if(!($currentResourceID) || !($lastResourceID)) {
- $currentSequence=pop(@sequences);
- $currentResourceID=pop(@currentResource);
- $lastResourceID=pop(@finishResource);
- if($currentSequence eq $topLevelSequenceNumber) {
- last;
- }
- }
- }
+################################################
+################################################
- # Handle gradable resources: exams, problems, etc
- $currentResourceID=~/(\d+)\.(\d+)/;
- my $partA=$1;
- my $partB=$2;
- if($hash{'src_'.$currentResourceID}=~
- /\.(problem|exam|quiz|assess|survey|form)$/ &&
- $partA eq $currentSequence) {
- my $Problem = &Apache::lonnet::symbclean(
- &Apache::lonnet::declutter($hash{'map_id_'.$partA}).
- '___'.$partB.'___'.
- &Apache::lonnet::declutter($hash{'src_'.
- $currentResourceID}));
-
- $cache->{$currentResourceID.':problem'}=$Problem;
- if(!defined($cache->{$currentSequence.':problems'})) {
- $cache->{$currentSequence.':problems'}=$currentResourceID;
- } else {
- $cache->{$currentSequence.':problems'}.=
- ':'.$currentResourceID;
- }
+=pod
- my $meta=$hash{'src_'.$currentResourceID};
-# $cache->{$currentResourceID.':title'}=
-# &Apache::lonnet::metdata($meta,'title');
- $cache->{$currentResourceID.':title'}=
- $hash{'title_'.$currentResourceID};
-
- # Get Parts for problem
- foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
- if($_=~/^stores\_(\d+)\_tries$/) {
- my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
- if(!defined($cache->{$currentSequence.':'.
- $currentResourceID.':parts'})) {
- $cache->{$currentSequence.':'.$currentResourceID.
- ':parts'}=$Part;
- } else {
- $cache->{$currentSequence.':'.$currentResourceID.
- ':parts'}.=':'.$Part;
- }
- foreach (split(/\,/,
- &Apache::lonnet::metadata($meta,'packages'))) {
- if($_=~/^optionresponse\_($Part)\_(\w+)$/) {
- if(defined($cache->{'OptionResponses'})) {
- $cache->{'OptionResponses'}.= ':::'.
- $hash{'src_'.$currentResourceID}.'::'.
- $hash{'title_'.$currentResourceID}.'::'.
- $Part.'::'.$Problem;
- } else {
- $cache->{'OptionResponses'}=
- $hash{'src_'.$currentResourceID}.'::'.
- $hash{'title_'.$currentResourceID}.'::'.
- $Part.'::'.$Problem;
- }
- }
- }
- }
- }
- }
+=item &get_student_id()
- # if resource == finish resource, then it is the end of a sequence/page
- if($currentResourceID eq $lastResourceID) {
- # pop off last resource of sequence
- $currentResourceID=pop(@currentResource);
- $lastResourceID=pop(@finishResource);
-
- if(defined($cache->{$currentSequence.':problems'})) {
- # Capture sequence information here
- $cache->{$currentSequence.':title'}=
- $hash{'title_'.$currentResourceID};
- $cache->{$currentSequence.':source'}=
- $hash{'src_'.$currentResourceID};
-
- my $totalProblems=0;
- foreach my $currentProblem (split(/\:/,
- $cache->{$currentSequence.
- ':problems'})) {
- foreach (split(/\:/,$cache->{$currentSequence.':'.
- $currentProblem.
- ':parts'})) {
- $totalProblems++;
- }
- }
- my @titleLength=split(//,$cache->{$currentSequence.
- ':title'});
- # $extra is 3 for problems correct and 3 for space
- # between problems correct and problem output
- my $extra = 6;
- if(($totalProblems + $extra) > (scalar @titleLength)) {
- $cache->{$currentSequence.':columnWidth'}=
- $totalProblems + $extra;
- } else {
- $cache->{$currentSequence.':columnWidth'}=
- (scalar @titleLength);
- }
- } else {
- # Remove sequence from list, if it contains no problems to
- # display.
- $cache->{'orderedSequences'}=~s/$currentSequence//;
- $cache->{'orderedSequences'}=~s/::/:/g;
- $cache->{'orderedSequences'}=~s/^:|:$//g;
- }
-
- $currentSequence=pop(@sequences);
- if($currentSequence eq $topLevelSequenceNumber) {
- last;
- }
- }
+Get the MySQL id of a student.
- # MOVE!!!
- # move to next resource
- unless(defined($hash{'to_'.$currentResourceID})) {
- # big problem, need to handle. Next is probably wrong
- last;
- }
- my @nextResources=();
- foreach (split(/\,/,$hash{'to_'.$currentResourceID})) {
- push(@nextResources, $hash{'goesto_'.$_});
- }
- push(@currentResource, @nextResources);
- # Set the next resource to be processed
- $currentResourceID=pop(@currentResource);
+Input: $sname, $dom
+
+Output: undef on error, integer $student_id on success.
+
+=item &get_student()
+
+Get student username:domain associated with the MySQL student_id.
+
+Input: $student_id
+
+Output: undef on error, string $student (username:domain) on success.
+
+=cut
+
+################################################
+################################################
+
+my $have_read_student_table = 0;
+my %ids_by_student;
+my %students_by_id;
+
+sub get_student_id {
+ my ($sname,$sdom) = @_;
+ my $student = $sname.':'.$sdom;
+ if (! $have_read_student_table) {
+ my @Result = &Apache::lonmysql::get_rows($student_table);
+ foreach (@Result) {
+ $ids_by_student{$_->[1]}=$_->[0];
+ }
+ $have_read_student_table = 1;
}
+ if (! exists($ids_by_student{$student})) {
+ &populate_student_table();
+ undef(%ids_by_student);
+ undef(%students_by_id);
+ my @Result = &Apache::lonmysql::get_rows($student_table);
+ foreach (@Result) {
+ $ids_by_student{$_->[1]}=$_->[0];
+ }
+ }
+ return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
+ return undef; # error
+}
- unless (untie(%hash)) {
- &Apache::lonnet::logthis("WARNING: ".
- "Could not untie coursemap $fn (browse)".
- ".");
+sub get_student {
+ my ($student_id) = @_;
+ if (! exists($students_by_id{$student_id}) ||
+ ! defined($students_by_id{$student_id}) ||
+ $students_by_id{$student_id} eq '') {
+ my @Result = &Apache::lonmysql::get_rows($student_table);
+ foreach (@Result) {
+ $students_by_id{$_->[0]}=$_->[1];
+ }
}
+ return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
+ return undef; # error
+}
- return 'OK';
+sub populate_student_table {
+ my ($courseid) = @_;
+ if (! defined($courseid)) {
+ $courseid = $ENV{'request.course.id'};
+ }
+ #
+ &setup_table_names($courseid);
+ my $dbh = &Apache::lonmysql::get_dbh();
+ my $request = 'INSERT IGNORE INTO '.$student_table.
+ "(student,section,status) VALUES ";
+ my $classlist = &get_classlist($courseid);
+ my $student_count=0;
+ while (my ($student,$data) = each %$classlist) {
+ my ($section,$status) = ($data->[&CL_SECTION()],
+ $data->[&CL_STATUS()]);
+ if ($section eq '' || $section =~ /^\s*$/) {
+ $section = 'none';
+ }
+ $request .= "('".$student."','".$section."','".$status."'),";
+ $student_count++;
+ }
+ return if ($student_count == 0);
+ chop($request);
+ $dbh->do($request);
+ if ($dbh->err()) {
+ &Apache::lonnet::logthis("error ".$dbh->errstr().
+ " occured executing \n".
+ $request);
+ }
+ return;
}
-=pod
+################################################
+################################################
-=item &ProcessClasslist()
+=pod
-Taking the class list dumped from &DownloadClasslist(), all the
-students and their non-class information is processed using the
-&ProcessStudentInformation() function. A date stamp is also recorded for
-when the data was processed.
+=item &clear_internal_caches()
-Takes data downloaded for a student and breaks it up into managable pieces and
-stored in cache data. The username, domain, class related date, PID,
-full name, and section are all processed here.
+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.
-=over 4
+=cut
-Input: $cache, $classlist, $courseID, $ChartDB, $c
+################################################
+################################################
+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);
+ $have_read_student_table = 0;
+ undef(%ids_by_student);
+ undef(%students_by_id);
+}
-$cache: A hash pointer to store the data
-$classlist: The hash of data collected about a student from
-&DownloadClasslist(). The hash contains a list of students, a pointer
-to a hash of student information for each student, and each student's section
-number.
+################################################
+################################################
-$courseID: The course ID
+=pod
-$ChartDB: The name of the cache database file.
+=item &update_full_student_data($sname,$sdom,$courseid)
-$c: The connection class used to determine if an abort has been sent to the
-browser
+Does a lonnet::dump on a student to populate the courses tables.
-Output: @names
+Input: $sname, $sdom, $courseid
-@names: An array of students whose information has been processed, and are to
-be considered in an arbitrary order.
+Output: $returnstatus
-=back
+$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, $student_table is updated to reflect the time of the update.
+
+Notice we do not insert the data and immediately query it. This means it
+is possible for there to be data returned this first time that is not
+available the second time. CYA.
=cut
-sub ProcessClasslist {
- my ($cache,$classlist,$courseID,$c)=@_;
- my @names=();
-
- $cache->{'ClasslistTimeStamp'}=$classlist->{'lastDownloadTime'};
- if($classlist->{'UpToDate'} eq 'true') {
- return split(/:::/,$cache->{'NamesOfStudents'});;
+################################################
+################################################
+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 $time_of_retrieval = time;
+ my @tmp = &Apache::lonnet::dump($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;
}
-
- foreach my $name (keys(%$classlist)) {
- if($name =~ /\:section/ || $name =~ /\:studentInformation/ ||
- $name eq '' || $name eq 'UpToDate' || $name eq 'lastDownloadTime') {
+ 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);
+ 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 ($parameter =~ /^resource\.(.*)\.(tries|
+ award|
+ awarded|
+ previous|
+ solved|
+ awarddetail|
+ submission|
+ submissiongrading|
+ molecule)\s*$/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}=$value;
+ }
+ }
}
- if($c->aborted()) {
- return ();
+ }
+ ##
+ ## 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".$store_command);
}
- push(@names,$name);
- my $studentInformation = $classlist->{$name.':studentInformation'},
- my $sectionData = $classlist->{$name.':sections'},
- my $date = $classlist->{$name},
- my ($studentName,$studentDomain) = split(/\:/,$name);
-
- $cache->{$name.':username'}=$studentName;
- $cache->{$name.':domain'}=$studentDomain;
- if(!defined($cache->{$name.':lastDownloadTime'})) {
- $cache->{$name.':lastDownloadTime'}='Not downloaded';
- }
-
- my ($checkForError)=keys(%$studentInformation);
- if($checkForError =~ /^(con_lost|error|no_such_host)/i) {
- $cache->{$name.':error'}=
- 'Could not download student environment data.';
- $cache->{$name.':fullname'}='';
- $cache->{$name.':id'}='';
- } else {
- $cache->{$name.':fullname'}=&ProcessFullName(
- $studentInformation->{'lastname'},
- $studentInformation->{'generation'},
- $studentInformation->{'firstname'},
- $studentInformation->{'middlename'});
- $cache->{$name.':id'}=$studentInformation->{'id'};
- }
-
- my ($end, $start)=split(':',$date);
- $courseID=~s/\_/\//g;
- $courseID=~s/^(\w)/\/$1/;
-
- my $sec='';
- foreach my $key (keys (%$sectionData)) {
- my $value = $sectionData->{$key};
- if ($key=~/^$courseID(?:\/)*(\w+)*\_st$/) {
- my $tempsection=$1;
- if($key eq $courseID.'_st') {
- $tempsection='';
+ }
+ ##
+ ## 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'},
+ $data->{'response_specific_value'}).
+ "',".$submission."),";
+ $store_rows++;
}
- my ($dummy,$roleend,$rolestart)=split(/\_/,$value);
- if($roleend eq $end && $rolestart eq $start) {
- $sec = $tempsection;
- last;
+ }
+ }
+ }
+ if ($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;
+}
+
+################################################
+################################################
+
+=pod
+
+=item &update_student_data()
+
+Input: $sname, $sdom, $courseid
+
+Output: $returnstatus, \%student_data
+
+$returnstatus is a string describing any errors that occured. 'okay' is the
+default.
+\%student_data is the data returned by a call to lonnet::currentdump.
+
+This subroutine loads a students data using lonnet::currentdump and inserts
+it into the MySQL database. The inserts are done on two tables,
+$performance_table and $parameters_table. $parameters_table holds the data
+that is not included in $performance_table. See the description of
+$performance_table elsewhere in this file. 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, $returnstatus is updated with a description of the error and
+\%student_data is returned.
+
+Notice we do not insert the data and immediately query it. This means it
+is possible for there to be data returned this first time that is not
+available the second time. CYA.
+
+=cut
+
+################################################
+################################################
+sub update_student_data {
+ my ($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 $time_of_retrieval = time;
+ my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
+ if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
+ &Apache::lonnet::logthis('error getting data for '.
+ $sname.':'.$sdom.' in course '.$courseid.
+ ':'.$tmp[0]);
+ $returnstatus = 'error getting data';
+ return ($returnstatus,undef);
+ }
+ if (scalar(@tmp) < 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,$time_of_retrieval);
+ }
+ #
+ return @Results;
+}
+
+sub store_updatetime {
+ my ($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();
+ $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
+ $student_id);
+ $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
+ $student_id);
+ #
+ # Store away the data
+ #
+ my $starttime = Time::HiRes::time;
+ my $elapsed = 0;
+ my $rows_stored;
+ my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
+ ' VALUES '."\n";
+ my $num_parameters = 0;
+ 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})) {
+ #
+ # make sure the symb is set up properly
+ my $symb_id = &get_symb_id($current_symb);
+ #
+ # Load data into the tables
+ 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";
+ $num_parameters ++;
+ if ($newstring !~ /''/) {
+ $store_parameters_command .= $newstring;
+ $rows_stored++;
}
}
+ next if ($parameter !~ /^resource\.(.*)\.solved$/);
+ #
+ 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 $award = $param_hash->{'resource.'.$part.'.award'};
+ my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
+ my $timestamp = $param_hash->{'timestamp'};
+ #
+ $solved = '' if (! defined($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;
+ $rows_stored++;
}
+ }
+ chop $store_parameters_command;
+ chop $store_parameters_command;
+ chop $store_performance_command;
+ chop $store_performance_command;
+ my $start = Time::HiRes::time;
+ $dbh->do($store_performance_command);
+ if ($dbh->err()) {
+ &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
+ &Apache::lonnet::logthis('command = '.$store_performance_command);
+ $returnstatus = 'error: unable to insert performance into database';
+ return ($returnstatus,$student_data);
+ }
+ $dbh->do($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);
+ &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 - $start;
+ return ($returnstatus,$student_data);
+}
- my $status='Expired';
- if(((!$end) || time < $end) && ((!$start) || (time > $start))) {
- $status='Active';
+######################################
+######################################
+
+=pod
+
+=item &ensure_tables_are_set_up($courseid)
+
+Checks to be sure the MySQL tables for the given class are set up.
+If $courseid is omitted it will be obtained from the environment.
+
+Returns nothing on success and 'error' on failure
+
+=cut
+
+######################################
+######################################
+sub ensure_tables_are_set_up {
+ my ($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,
+ $found_performance,$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);
+ $found_part = 1 if ($_ eq $part_table);
+ $found_performance = 1 if ($_ eq $performance_table);
+ $found_parameters = 1 if ($_ eq $parameters_table);
+ $found_fulldump_part = 1 if ($_ 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)) {
+ return 'error';
}
- $cache->{$name.':Status'}=$status;
- $cache->{$name.':section'}=$sec;
}
+}
+
+################################################
+################################################
+
+=pod
+
+=item &ensure_current_data()
- $cache->{'ClasslistTimestamp'}=time;
- $cache->{'NamesOfStudents'}=join(':::',@names);
+Input: $sname, $sdom, $courseid
- return @names;
+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;
+ 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 $data = undef;
+ if (@Result) {
+ $updatetime = $Result[0]->[5]; # Ack! This is dumb!
+ }
+ if ($modifiedtime > $updatetime) {
+ ($status,$data) = &update_student_data($sname,$sdom,$courseid);
+ }
+ return ($status,$data);
}
+################################################
+################################################
+
=pod
-=item &ProcessStudentData()
+=item &ensure_current_full_data($sname,$sdom,$courseid)
-Takes the course data downloaded for a student in
-&DownloadCourseInformation() and breaks it up into key value pairs
-to be stored in the cached data. The keys are comprised of the
-$username:$domain:$keyFromCourseDatabase. The student username:domain is
-stored away signifying that the student's information has been downloaded and
-can be reused from cached data.
+Input: $sname, $sdom, $courseid
-=over 4
+Output: $status
-Input: $cache, $courseData, $name
+This routine ensures the fulldata (the data from a lonnet::dump, not a
+lonnet::currentdump) for a given student is up to date.
+The $student_table is queried to determine the time of the last update.
+If the students fulldata is out of date, &update_full_student_data() is
+called.
-$cache: A hash pointer to store data
+The return value from the call to &update_full_student_data() is returned.
-$courseData: A hash pointer that points to the course data downloaded for a
-student.
+=cut
-$name: username:domain
+################################################
+################################################
+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 = $Result[0]->[6];
+ }
+ if (! defined($updatetime) || $modifiedtime > $updatetime) {
+ $status = &update_full_student_data($sname,$sdom,$courseid);
+ }
+ return $status;
+}
-Output: None
+################################################
+################################################
-*NOTE: There is no output, but an error message is stored away in the cache
-data. This is checked in &FormatStudentData(). The key username:domain:error
-will only exist if an error occured. The error is an error from
-&DownloadCourseInformation().
+=pod
-=back
+=item &get_student_data_from_performance_cache()
+
+Input: $sname, $sdom, $symb, $courseid
+
+Output: hash reference containing the data for the given student.
+If $symb is undef, all the students data is returned.
+
+This routine is the heart of the local caching system. See the description
+of $performance_table, $symb_table, $student_table, and $part_table. The
+main task is building the MySQL request. The tables appear in the request
+in the order in which they should be parsed by MySQL. When searching
+on a student the $student_table is used to locate the 'student_id'. All
+rows in $performance_table which have a matching 'student_id' are returned,
+with data from $part_table and $symb_table which match the entries in
+$performance_table, 'part_id' and 'symb_id'. When searching on a symb,
+the $symb_table is processed first, with matching rows grabbed from
+$performance_table and filled in from $part_table and $student_table in
+that order.
+
+Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
+interesting, especially if you play with the order the tables are listed.
=cut
-sub ProcessStudentData {
- my ($cache,$courseData,$name)=@_;
+################################################
+################################################
+sub get_student_data_from_performance_cache {
+ my ($sname,$sdom,$symb,$courseid)=@_;
+ my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
+ &setup_table_names($courseid);
+ #
+ # Return hash
+ my $studentdata;
+ #
+ my $dbh = &Apache::lonmysql::get_dbh();
+ my $request = "SELECT ".
+ "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
+ "a.timestamp ";
+ if (defined($student)) {
+ $request .= "FROM $student_table AS b ".
+ "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
+# "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
+ "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
+ "WHERE student='$student'";
+ if (defined($symb) && $symb ne '') {
+ $request .= " AND d.symb=".$dbh->quote($symb);
+ }
+ } elsif (defined($symb) && $symb ne '') {
+ $request .= "FROM $symb_table as d ".
+ "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
+# "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
+ "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
+ "WHERE symb='".$dbh->quote($symb)."'";
+ }
+ my $starttime = Time::HiRes::time;
+ my $rows_retrieved = 0;
+ my $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());
+ return undef;
+ }
+ foreach my $row (@{$sth->fetchall_arrayref}) {
+ $rows_retrieved++;
+ my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
+ (@$row);
+ my $base = 'resource.'.$part;
+ $studentdata->{$symb}->{$base.'.solved'} = $solved;
+ $studentdata->{$symb}->{$base.'.tries'} = $tries;
+ $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
+ $studentdata->{$symb}->{$base.'.award'} = $award;
+ $studentdata->{$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};
+ }
+ return $studentdata;
+}
+
+################################################
+################################################
- if($courseData->{'UpToDate'} eq 'true') {
- $cache->{$name.':lastDownloadTime'}=$courseData->{'lastDownloadTime'};
- return;
+=pod
+
+=item &get_current_state()
+
+Input: $sname,$sdom,$symb,$courseid
+
+Output: Described below
+
+Retrieve the current status of a students performance. $sname and
+$sdom are the only required parameters. If $symb is undef the results
+of an &Apache::lonnet::currentdump() will be returned.
+If $courseid is undef it will be retrieved from the environment.
+
+The return structure is based on &Apache::lonnet::currentdump. If
+$symb is unspecified, all the students data is returned in a hash of
+the form:
+(
+ symb1 => { param1 => value1, param2 => value2 ... },
+ symb2 => { param1 => value1, param2 => value2 ... },
+)
+
+If $symb is specified, a hash of
+(
+ param1 => value1,
+ param2 => value2,
+)
+is returned.
+
+If no data is found for $symb, or if the student has no performance data,
+an empty list is returned.
+
+=cut
+
+################################################
+################################################
+sub get_current_state {
+ my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
+ #
+ $courseid = $ENV{'request.course.id'} if (! defined($courseid));
+ #
+ return () if (! defined($sname) || ! defined($sdom));
+ #
+ my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
+# &Apache::lonnet::logthis
+# ('sname = '.$sname.
+# ' domain = '.$sdom.
+# ' status = '.$status.
+# ' data is '.(defined($data)?'defined':'undefined'));
+# while (my ($symb,$hash) = each(%$data)) {
+# &Apache::lonnet::logthis($symb."\n----------------------------------");
+# while (my ($key,$value) = each (%$hash)) {
+# &Apache::lonnet::logthis(" ".$key." = ".$value);
+# }
+# }
+ #
+ if (defined($data) && defined($symb) && ref($data->{$symb})) {
+ return %{$data->{$symb}};
+ } elsif (defined($data) && ! defined($symb) && ref($data)) {
+ return %$data;
+ }
+ if ($status eq 'no data') {
+ return ();
+ } else {
+ if ($status ne 'okay' && $status ne '') {
+ &Apache::lonnet::logthis('status = '.$status);
+ return ();
+ }
+ my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
+ $symb,$courseid);
+ return %$returnhash if (defined($returnhash));
}
+ return ();
+}
- my @courseKeys = keys(%$courseData);
+################################################
+################################################
- foreach (@courseKeys) {
- if(/^(con_lost|error|no_such_host)/i) {
- $cache->{$name.':error'}='Could not download course data.';
- return;
+=pod
+
+=item &get_problem_statistics()
+
+Gather data on a given problem. The database is assumed to be
+populated and all local caching variables are assumed to be set
+properly. This means you need to call &ensure_current_data for
+the students you are concerned with prior to calling this routine.
+
+Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
+
+=over 4
+
+=item $Sections Array ref containing section 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.
+
+=item $part is the part id you need statistics for
+
+=item $courseid is the course id, of course!
+
+=item $starttime and $endtime are unix times which to use to limit
+the statistical data.
+
+=back
+
+Outputs: See the code for up to date information. A hash reference is
+returned. The hash has the following keys defined:
+
+=over 4
+
+=item num_students The number of students attempting the problem
+
+=item tries The total number of tries for the students
+
+=item max_tries The maximum number of tries taken
+
+=item mean_tries The average number of tries
+
+=item num_solved The number of students able to solve the problem
+
+=item num_override The number of students whose answer is 'correct_by_override'
+
+=item deg_of_diff The degree of difficulty of the problem
+
+=item std_tries The standard deviation of the number of tries
+
+=item skew_tries The skew of the number of tries
+
+=item per_wrong The number of students attempting the problem who were not
+able to answer it correctly.
+
+=back
+
+=cut
+
+################################################
+################################################
+sub get_problem_statistics {
+ my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
+ return if (! defined($symb) || ! defined($part));
+ $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 $dbh = &Apache::lonmysql::get_dbh();
+ return undef if (! defined($dbh));
+ #
+ # Clean out the table
+ $dbh->do('DROP TABLE '.$stats_table); # May return an error
+ my $request =
+ 'CREATE TEMPORARY TABLE '.$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 ';
+ }
+ $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
+ #
+ # Limit the students included to those specified
+ if (defined($Sections) && lc($Sections->[0]) ne 'all') {
+ $request .= ' AND ('.
+ join(' OR ', map { "b.section='".$_."'" } @$Sections
+ ).')';
+ }
+ if (defined($status) && lc($status) ne 'any') {
+ $request .= " AND b.status='".$status."'";
+ }
+ #
+ # 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;
+ }
+ if (defined($time_requirements)) {
+ $request .= ' AND '.$time_requirements;
+ }
+ #
+ # Finally, execute the request to create the temporary table
+ $dbh->do($request);
+ #
+ # 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);
+ #
+ $num = 0 if (! defined($num));
+ $tries = 0 if (! defined($tries));
+ $max = 0 if (! defined($max));
+ $min = 0 if (! defined($min));
+ $STD = 0 if (! defined($STD));
+ $Solved = 0 if (! defined($Solved));
+ $solved = 0 if (! defined($solved));
+ #
+ # 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);
+ $numwrong = $num-$Solved;
+ $wrongpercent=int(10*100*$numwrong/$num)/10;
+ }
+ #
+ # Drop the temporary table
+ $dbh->do('DROP TABLE '.$stats_table); # May return an error
+ #
+ # Return result
+ return { num_students => $num,
+ tries => $tries,
+ 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 };
+}
- $cache->{$name.':lastDownloadTime'}=$courseData->{'lastDownloadTime'};
- foreach (@courseKeys) {
- $cache->{$name.':'.$_}=$courseData->{$_};
+##
+## This is a helper for get_statistics
+sub execute_SQL_request {
+ my ($dbh,$request)=@_;
+# &Apache::lonnet::logthis($request);
+ my $sth = $dbh->prepare($request);
+ $sth->execute();
+ my $row = $sth->fetchrow_arrayref();
+ if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
+ return @$row;
}
+ 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 ($top,$sequences,$assessments) = get_sequence_assessment_data();
+ if (! defined($top) || ! ref($top)) {
+ # There has been an error, better report it
+ &Apache::lonnet::logthis('top is undefined');
+ 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 $res (@$assessments) {
+ 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;
}
-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;
- }
- }
- }
+=pod
- return \%Discuss;
+=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;
}
-# ----- END PROCESSING FUNCTIONS ---------------------------------------
+##########################################################
+##########################################################
=pod
-=head1 HELPER FUNCTIONS
+=item &limit_by_section_and_status
+
+Build SQL WHERE condition which limits the data collected by section and
+student status.
-These are just a couple of functions do various odd and end
-jobs.
+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
-# ----- HELPER FUNCTIONS -----------------------------------------------
+##########################################################
+##########################################################
+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') {
+ $enrollment_requirements = $tablename.".status='".$enrollment."'";
+ }
+ return ($student_requirements,$enrollment_requirements);
+}
+
+######################################################
+######################################################
=pod
-=item &ProcessFullName()
+=item rank_students_by_scores_on_resources
-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.
+Inputs:
+ $resources: array ref of hash ref. Each hash ref needs key 'symb'.
+ $Sections: array ref of sections to include,
+ $enrollment: string,
+ $courseid (may be omitted)
-=cut
+Returns; An array of arrays. The sub arrays contain a student name and
+their score on the resources.
-sub ProcessFullName {
- my ($lastname, $generation, $firstname, $middlename)=@_;
- my $Str = '';
+=cut
- if($lastname ne '') {
- $Str .= $lastname.' ';
- if($generation ne '') {
- $Str .= $generation;
- } else {
- chop($Str);
- }
- $Str .= ', ';
- if($firstname ne '') {
- $Str .= $firstname.' ';
- }
- if($middlename ne '') {
- $Str .= $middlename;
- } else {
- chop($Str);
- if($firstname eq '') {
- chop($Str);
- }
- }
- } else {
- if($firstname ne '') {
- $Str .= $firstname.' ';
- }
- if($middlename ne '') {
- $Str .= $middlename.' ';
- }
- if($generation ne '') {
- $Str .= $generation;
- } else {
- chop($Str);
- }
+######################################################
+######################################################
+sub RNK_student { return 0; };
+sub RNK_score { return 1; };
+
+sub rank_students_by_scores_on_resources {
+ my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
+ 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 $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
+ } @$resources
+ ).')';
+ my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
+ my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
+ $performance_table.' AS a '.
+ 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
+ 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
+ 'WHERE ';
+ if (defined($section_limits)) {
+ $request .= $section_limits.' AND ';
}
+ if (defined($enrollment_limits)) {
+ $request .= $enrollment_limits.' AND ';
+ }
+ if (defined($time_limits)) {
+ $request .= $time_limits.' AND ';
+ }
+ if ($symb_limits ne '()') {
+ $request .= $symb_limits.' AND ';
+ }
+ $request =~ s/( AND )$//; # Remove extra conjunction
+ $request =~ s/( WHERE )$//; # In case there were no limits placed on it
+ $request .= ' GROUP BY a.student_id ORDER BY score';
+ #&Apache::lonnet::logthis('request = '.$/.$request);
+ my $sth = $dbh->prepare($request);
+ $sth->execute();
+ my $rows = $sth->fetchall_arrayref();
+ return ($rows);
+}
- return $Str;
+########################################################
+########################################################
+
+=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 ($resource,$part,$students,$courseid,$starttime,$endtime) = @_;
+ if (! defined($courseid)) {
+ $courseid = $ENV{'request.course.id'};
+ }
+ #
+ &setup_table_names($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 ';
+ $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'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 = '.$dbh->errstr());
+ return (undef,undef);
+ }
+ return ($rows->[0],$rows->[1]);
}
+########################################################
+########################################################
+
=pod
-=item &TestCacheData()
+=item &score_stats
-Determine if the cache database can be accessed with a tie. It waits up to
-ten seconds before returning failure. This function exists to help with
-the problems with stopping the data download. When an abort occurs and the
-user quickly presses a form button and httpd child is created. This
-child needs to wait for the other to finish (hopefully within ten seconds).
+Inputs: $Sections, $enrollment, $symbs, $starttime,
+ $endtime, $courseid
-=over 4
+$Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
+elsewhere in this module.
+$symbs is an array ref of symbs
-Input: $ChartDB
+Returns: minimum, maximum, mean, s.d., number of students, and maximum
+ possible of student scores on the given resources
-$ChartDB: The name of the cache database to be opened
+=cut
-Output: -1, 0, 1
+########################################################
+########################################################
+sub score_stats {
+ my ($Sections,$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 $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
+ my @Symbids = map { &get_symb_id($_); } @{$symbs};
+ #
+ my $stats_table = $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 '.$student_table.' AS b ON a.student_id=b.student_id '.
+ 'WHERE ('.$symb_restriction.')';
+ if ($time_limits) {
+ $request .= ' AND '.$time_limits;
+ }
+ if ($section_limits) {
+ $request .= ' AND '.$section_limits;
+ }
+ if ($enrollment_limits) {
+ $request .= ' AND '.$enrollment_limits;
+ }
+ $request .= ' GROUP BY a.student_id';
+# &Apache::lonnet::logthis('request = '.$/.$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.
+ ' WHERE ('.$symb_restriction.')';
+ my ($max_possible) = &execute_SQL_request($dbh,$request);
+ # &Apache::lonnet::logthis('request = '.$/.$request);
+ return($min,$max,$ave,$std,$count,$max_possible);
+}
--1: Couldn't tie database
- 0: Use cached data
- 1: New cache database created, use that.
-=back
+########################################################
+########################################################
+
+=pod
+
+=item &count_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., and number of students
+ of the number of items correct on the given resources
=cut
-sub TestCacheData {
- my ($ChartDB,$isRecalculate,$totalDelay)=@_;
- my $isCached=-1;
- my %testData;
- my $tieTries=0;
+########################################################
+########################################################
+sub count_stats {
+ my ($Sections,$enrollment,$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 $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
+ my @Symbids = map { &get_symb_id($_); } @{$symbs};
+ #
+ my $stats_table = $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,'.
+ 'COUNT(a.award) AS count FROM '.
+ $performance_table.' AS a '.
+ 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
+ 'WHERE ('.$symb_restriction.')'.
+ " AND a.award!='INCORRECT_ATTEMPTED'";
+ if ($time_limits) {
+ $request .= ' AND '.$time_limits;
+ }
+ if ($section_limits) {
+ $request .= ' AND '.$section_limits;
+ }
+ if ($enrollment_limits) {
+ $request .= ' AND '.$enrollment_limits;
+ }
+ $request .= ' GROUP BY a.student_id';
+# &Apache::lonnet::logthis('request = '.$/.$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);
+}
+
+######################################################
+######################################################
- if(!defined($totalDelay)) {
- $totalDelay = 10;
+=pod
+
+=item get_student_data
+
+=cut
+
+######################################################
+######################################################
+sub get_student_data {
+ my ($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 = '.$dbh->errstr());
+ return undef;
+ }
+ my $dataset = $sth->fetchall_arrayref();
+ if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
+ return $dataset;
+ }
+}
- if ((-e "$ChartDB") && (!$isRecalculate)) {
- $isCached = 1;
- } else {
- $isCached = 0;
+sub RD_student_id { return 0; }
+sub RD_awarddetail { return 1; }
+sub RD_response_eval { return 2; }
+sub RD_submission { return 3; }
+sub RD_timestamp { return 4; }
+sub RD_tries { return 5; }
+sub RD_sname { return 6; }
+
+sub get_response_data {
+ my ($Sections,$enrollment,$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);
+ my $response_id = &get_part_id($response);
+ #
+ 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 $request = 'SELECT '.
+ 'a.student_id, a.awarddetail, a.response_specific_value, '.
+ 'a.submission, b.timestamp, c.tries, d.student '.
+ 'FROM '.$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 '.$student_table.' AS d '.
+ 'ON a.student_id=d.student_id '.
+ 'WHERE '.
+ 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
+ if (defined($student_requirements) || defined($enrollment_requirements)) {
+ $request .= ' AND ';
+ if (defined($student_requirements)) {
+ $request .= $student_requirements.' AND ';
+ }
+ if (defined($enrollment_requirements)) {
+ $request .= $enrollment_requirements.' AND ';
+ }
+ $request =~ s/( AND )$//;
+ }
+ $request .= ' ORDER BY b.timestamp';
+# &Apache::lonnet::logthis("request =\n".$request);
+ my $sth = $dbh->prepare($request);
+ $sth->execute();
+ if ($dbh->err) {
+ &Apache::lonnet::logthis('error = '.$dbh->errstr());
+ 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[$i]->[3] =~ s/(\'$|^\')//g;
+ }
+ return $dataset;
}
+}
- while($tieTries < $totalDelay) {
- my $result=0;
- if($isCached) {
- $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_READER,0640);
- } else {
- $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_NEWDB,0640);
+
+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 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 $request = 'SELECT '.
+ 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
+ 'FROM '.$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 = '.$dbh->errstr());
+ 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[$i]->[2] =~ s/(\'$|^\')//g;
}
- if($result) {
- last;
+ return $dataset;
+ }
+ return undef; # error occurred
+}
+
+sub RT_student_id { return 0; }
+sub RT_awarded { return 1; }
+sub RT_tries { return 2; }
+sub RT_timestamp { return 3; }
+
+sub get_response_time_data {
+ my ($students,$symb,$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);
+ my $part_id = &get_part_id($part);
+ #
+ my $dbh = &Apache::lonmysql::get_dbh();
+ return undef if (! defined($dbh));
+ my $request = 'SELECT '.
+ 'a.student_id, a.awarded, a.tries, b.timestamp '.
+ 'FROM '.$fulldump_part_table.' AS a '.
+ 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
+# 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
+# 'a.transaction = b.transaction '.
+ 'WHERE '.
+ 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
+ if (defined($students)) {
+ $request .= ' AND ('.
+ join(' OR ', map {'a.student_id='.
+ &get_student_id($_->{'username'},
+ $_->{'domain'})
+ } @$students
+ ).')';
+ }
+ $request .= ' ORDER BY b.timestamp';
+# &Apache::lonnet::logthis("request =\n".$request);
+ my $sth = $dbh->prepare($request);
+ $sth->execute();
+ if ($dbh->err) {
+ &Apache::lonnet::logthis('error = '.$dbh->errstr());
+ return undef;
+ }
+ my $dataset = $sth->fetchall_arrayref();
+ if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
+ return $dataset;
+ }
+
+}
+
+################################################
+################################################
+
+=pod
+
+=item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
+
+=cut
+
+################################################
+################################################
+sub get_student_scores {
+ my ($Sections,$Symbs,$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 = $courseid.'_temp_'.time;
+ #
+ 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 $student_requirements;
+ if ( (defined($Sections) && $Sections->[0] ne 'all')) {
+ $student_requirements = '('.
+ join(' OR ', map { "b.section='".$_."'" } @$Sections
+ ).')';
+ }
+ #
+ my $enrollment_requirements=undef;
+ if (defined($enrollment) && $enrollment ne 'Any') {
+ $enrollment_requirements = "b.status='".$enrollment."'";
+ }
+ #
+ my $time_requirements = undef;
+ if (defined($starttime)) {
+ $time_requirements .= "a.timestamp>='".$starttime."'";
+ if (defined($endtime)) {
+ $time_requirements .= " AND a.timestamp<='".$endtime."'";
}
- $tieTries++;
- sleep 1;
+ } elsif (defined($endtime)) {
+ $time_requirements .= "a.timestamp<='".$endtime."'";
}
- if($tieTries >= $totalDelay) {
- return -1;
+ ##
+ ##
+ my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
+ ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
+ $performance_table.' AS a ';
+ if (defined($student_requirements) || defined($enrollment_requirements)) {
+ $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
}
+ if (defined($symb_requirements) ||
+ defined($student_requirements) ||
+ defined($enrollment_requirements) ) {
+ $request .= ' WHERE ';
+ }
+ if (defined($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 = '.$dbh->errstr());
+ 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 = '.$dbh->errstr());
+ return undef;
+ }
+ my $dataset = $sth->fetchall_arrayref();
+ return $dataset;
+}
- untie(%testData);
+################################################
+################################################
- return $isCached;
+=pod
+
+=item &setup_table_names()
+
+input: course id
+
+output: none
+
+Cleans up the package variables for local caching.
+
+=cut
+
+################################################
+################################################
+sub setup_table_names {
+ my ($courseid) = @_;
+ if (! defined($courseid)) {
+ $courseid = $ENV{'request.course.id'};
+ }
+ #
+ if (! defined($current_course) || $current_course ne $courseid) {
+ # Clear out variables
+ $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);
+ #
+ $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';
+ $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,
+ $performance_table,
+ $parameters_table,
+ $fulldump_part_table,
+ $fulldump_response_table,
+ $fulldump_timestamp_table,
+ $weight_table,
+ );
+ return;
}
-sub GetFileTimestamp {
- my ($studentDomain,$studentName,$filename,$root)=@_;
- $studentDomain=~s/\W//g;
- $studentName=~s/\W//g;
- my $subdir=$studentName.'__';
- $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
- my $proname="$studentDomain/$subdir/$studentName";
- $proname .= '/'.$filename;
- my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
- $root);
- my $fileStat = $dir[0];
- my @stats = split('&', $fileStat);
- if(@stats) {
- return $stats[9];
+################################################
+################################################
+
+=pod
+
+=back
+
+=item End of Local Data Caching Subroutines
+
+=cut
+
+################################################
+################################################
+
+} # End scope of table identifiers
+
+################################################
+################################################
+
+=pod
+
+=head3 Classlist Subroutines
+
+=item &get_classlist();
+
+Retrieve the classist of a given class or of the current class. Student
+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'}).
+
+Returns a reference to a hash which contains:
+ keys '$sname:$sdom'
+ values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type]
+
+The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
+as indices into the returned list to future-proof clients against
+changes in the list order.
+
+=cut
+
+################################################
+################################################
+
+sub CL_SDOM { return 0; }
+sub CL_SNAME { return 1; }
+sub CL_END { return 2; }
+sub CL_START { return 3; }
+sub CL_ID { return 4; }
+sub CL_SECTION { return 5; }
+sub CL_FULLNAME { return 6; }
+sub CL_STATUS { return 7; }
+sub CL_TYPE { return 8; }
+
+sub get_classlist {
+ my ($cid,$cdom,$cnum) = @_;
+ $cid = $cid || $ENV{'request.course.id'};
+ $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
+ $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
+ my $now = time;
+ #
+ my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
+ while (my ($student,$info) = each(%classlist)) {
+ if ($student =~ /^(con_lost|error|no_such_host)/i) {
+ &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
+ return undef;
+ }
+ my ($sname,$sdom) = split(/:/,$student);
+ my @Values = split(/:/,$info);
+ my ($end,$start,$id,$section,$fullname,$type);
+ if (@Values > 2) {
+ ($end,$start,$id,$section,$fullname,$type) = @Values;
+ } else { # We have to get the data ourselves
+ ($end,$start) = @Values;
+ $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
+ my %info=&Apache::lonnet::get('environment',
+ ['firstname','middlename',
+ 'lastname','generation','id'],
+ $sdom, $sname);
+ my ($tmp) = keys(%info);
+ if ($tmp =~/^(con_lost|error|no_such_host)/i) {
+ $fullname = 'not available';
+ $id = 'not available';
+ &Apache::lonnet::logthis('unable to retrieve environment '.
+ 'for '.$sname.':'.$sdom);
+ } else {
+ $fullname = &ProcessFullName(@info{qw/lastname generation
+ firstname middlename/});
+ $id = $info{'id'};
+ }
+ # Update the classlist with this students information
+ if ($fullname ne 'not available') {
+ my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
+ my $reply=&Apache::lonnet::cput('classlist',
+ {$student => $enrolldata},
+ $cdom,$cnum);
+ if ($reply !~ /^(ok|delayed)/) {
+ &Apache::lonnet::logthis('Unable to update classlist for '.
+ 'student '.$sname.':'.$sdom.
+ ' error:'.$reply);
+ }
+ }
+ }
+ my $status='Expired';
+ if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
+ $status='Active';
+ }
+ $classlist{$student} =
+ [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type];
+ }
+ if (wantarray()) {
+ return (\%classlist,['domain','username','end','start','id',
+ 'section','fullname','status','type']);
} else {
- return -1;
+ return \%classlist;
}
}
@@ -798,3 +2962,5 @@ sub GetFileTimestamp {
1;
__END__
+
+