/usr/share/perl5/AMC/DataModule/scoring.pm is in auto-multiple-choice-common 1.2.1-3.
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#
# Copyright (C) 2011-2013 Alexis Bienvenue <paamc@passoire.fr>
#
# This file is part of Auto-Multiple-Choice
#
# Auto-Multiple-Choice is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 2 of
# the License, or (at your option) any later version.
#
# Auto-Multiple-Choice is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Auto-Multiple-Choice. If not, see
# <http://www.gnu.org/licenses/>.
package AMC::DataModule::scoring;
# AMC scoring management.
# This module is used to store (in a SQLite database) and handle all
# data concerning data scoring (scoring strategies, scores and marks).
# TERMINOLOGY NOTE:
#
# 'student' refers to the student number that is written at the top of
# each page, in the format +<student>/<page>/<check>+
#
# If the questions are printed from AMC, and not photocopied, each
# physical student has a different student number on his sheet.
#
# If some questions are photocopied before beeing distributed to the
# students, several students can have the same student number. To make
# a difference between their completed answer sheets, a 'copy' number
# is added. 'copy' is 1 for the first student using a given student
# number sheet, then 2, and so on.
#
# Hence, a completed answer sheet is identified by the (student,copy)
# couple, and a printed sheet (and correct answers, scoring
# strategies) is identified by the student number only.
#
# 'question' is a number associated by LaTeX with every different
# question (based on the small text given as XXX in the
# \begin{question}{XXX} or \begin{questionmult}{XXX} commands).
#
# 'answer' is the answer number, starting from 1 for each question,
# before beeing shuffled.
# TABLES:
#
# title contains the titles (argument of the \begin{question} and
# \begin{questionmult} commands) of all the questions
#
# * question is the question number, as created by LaTeX and used in
# the databases <layout>, <capture>.
#
# * title id the title of the question.
#
# default holds the default scoring strategies, as specified with the
# \scoringDefaultM and \scoringDefaultS commands in the LaTeX source
# file. This table contains 2 rows.
#
# * type is the question type, either QUESTION_SIMPLE or QUESTION_MULT
# (these constants are defined in this module).
#
# * strategy is the default strategy string for this question type.
#
# main holds scoring strategies defined outside question/questionmult
# environments, either outside the onecopy/examcopy data (with
# student=-1), or inside (student=current student number).
#
# * student is the student number.
#
# * strategy is the strategy string given in the LaTeX file as an
# argument of the \scoring command.
#
# question holds scoring strategies for questions.
#
# * student is the student number.
#
# * question is the question number.
#
# * type is the question type, either QUESTION_SIMPLE or
# QUESTION_MULTIPLE
#
# * indicative is 1 if the question is indicative (the score is not
# taken into account when computing the student mark).
#
# * strategy is the question scoring strategy string, given in the
# LaTeX file inside the question/questionmult environment (but
# before \correctchoice and \wrongchoice commands).
#
# answer holds scoring strategies concerning answers.
#
# * student is the student number.
#
# * question is the question number.
#
# * answer is the answer number, starting from 1 for each question.
#
# * correct is 1 if this choice is correct (use of \correctchoice).
#
# * strategy is the answer scoring strategy string, given in the LaTeX
# file after the corresponding correctchoice/wrongchoice commands.
#
# score holds the questions scores for each student.
#
# * student is the student number.
#
# * copy is the copy number.
#
# * question is the question number.
#
# * score is the score resulting from applying the scoring strategy to
# the student's answers.
#
# * why is a small string that is used to know when special cases has
# been encountered:
#
# E means syntax error (several boxes ticked for a simple
# question, or " none of the above" AND another box ticked for a
# multiple question).
#
# V means that no box are ticked.
#
# P means that a floor has been applied.
#
# * max is the question score associated to a copy where all answers
# are correct (or 1 for indicative questions).
#
# mark holds global marks of the students.
#
# * student is the student number.
#
# * copy is the copy number.
#
# * total is the total score (sum of the questions scores).
#
# * max is the total score associated to a perfect copy.
#
# * mark is the student mark.
#
# code holds the codes entered by the students (see \AMCcode).
#
# * student is the student number.
#
# * copy is the copy number.
#
# * code is the code name.
#
# * value is the code value.
# VARIABLES:
#
# postcorrect_flag is 1 if the postcorrect mode is supposed to be used
# (correct answers are not indicated in the LaTeX source, but will be
# set from a teacher completed answer sheet).
#
# postcorrect_student
# postcorrect_copy identify the sheet completed by the teacher.
#
# --- the folleing values are supplied in the Preferences window
#
# darkness_threshold is the parameter used for determining wether a
# box is ticked or not.
#
# mark_floor is the minimum mark to be given to a student.
#
# mark_max is the mark to be given to a perfect completed answer
# sheet.
#
# ceiling is true if AMC should put a ceiling on the students marks
# (this can be useful if the SUF global scoring strategy is used).
#
# rounding is the rounding type to be used for the marks.
#
# granularity is the granularity for the marks rounding.
use Exporter qw(import);
use constant {
QUESTION_SIMPLE => 1,
QUESTION_MULT => 2,
};
our @EXPORT_OK = qw(QUESTION_SIMPLE QUESTION_MULT);
our %EXPORT_TAGS = ( 'question' => [ qw/QUESTION_SIMPLE QUESTION_MULT/ ],
);
use AMC::Basic;
use AMC::DataModule;
use AMC::DataModule::capture ':zone';
use XML::Simple;
@ISA=("AMC::DataModule");
sub version_current {
return(1);
}
sub version_upgrade {
my ($self,$old_version)=@_;
if($old_version==0) {
# Upgrading from version 0 (empty database) to version 1 :
# creates all the tables.
debug "Creating scoring tables...";
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("title")
." (question INTEGER, title TEXT)");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("default")
." (type INTEGER, strategy TEXT)");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("main")
." (student INTEGER, strategy TEXT)");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("question")
." (student INTEGER, question INTEGER, type INTEGER, indicative INTEGER DEFAULT 0, strategy TEXT, PRIMARY KEY (student,question))");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("answer")
." (student INTEGER, question INTEGER, answer INTEGER, correct INTEGER, strategy INTEGER, PRIMARY KEY (student,question,answer))");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("alias")
." (student INTEGER,see INTEGER)");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("score")
." (student INTEGER, copy INTEGER, question INTEGER, score REAL, why TEXT, max REAL, PRIMARY KEY (student,copy,question))");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("mark")
." (student INTEGER, copy INTEGER, total REAL, max REAL, mark REAL, PRIMARY KEY (student,copy))");
$self->sql_do("CREATE TABLE IF NOT EXISTS ".$self->table("code")
." (student INTEGER, copy INTEGER, code TEXT, value TEXT, PRIMARY KEY (student,copy,code))");
$self->statement('NEWdefault')->execute(QUESTION_SIMPLE,"");
$self->statement('NEWdefault')->execute(QUESTION_MULT,"");
$self->populate_from_xml;
return(1);
}
return('');
}
# populate_from_xml read the old format XML files (if any) and inserts
# them in the new SQLite database
sub populate_from_xml {
my ($self)=@_;
my $scoring_file=$self->{'data'}->directory;
$scoring_file =~ s:/[^/]+/?$:/bareme.xml:;
return if(!-f $scoring_file);
$self->progression('begin',__"Fetching scoring data from old format XML files...");
my $xml=XMLin($scoring_file,ForceArray => 1,KeyAttr=> [ 'id' ]);
$self->main_strategy(-1,$xml->{'main'});
my @s=(keys %{$xml->{'etudiant'}});
my $frac=0;
for my $student (@s) {
my $s=$xml->{'etudiant'}->{$student};
if($student eq 'defaut') {
$self->default_strategy(QUESTION_SIMPLE,
$s->{'question'}->{'S'}->{'bareme'});
$self->default_strategy(QUESTION_MULT,
$s->{'question'}->{'M'}->{'bareme'});
} elsif($student =~ /^[0-9]+$/) {
$self->main_strategy($student,$s->{'main'});
for my $question (keys %{$s->{'question'}}) {
if($question =~ /^[0-9]+$/) {
my $q=$s->{'question'}->{$question};
$self->question_title($question,$q->{'titre'});
$self->new_question
($student,$question,
($q->{'multiple'} ? QUESTION_MULT : QUESTION_SIMPLE),
($q->{'indicative'} ? 1 : 0),$q->{'bareme'});
if($q->{'reponse'}) {
if(ref($q->{'reponse'}) eq 'HASH') {
for my $answer (keys %{$q->{'reponse'}}) {
my $a=$q->{'reponse'}->{$answer};
$self->new_answer($student,$question,$answer,
$a->{'bonne'},$a->{'bareme'});
}
} else {
debug "WARNING: reponse is not a HASHREF for S=$student Q=$question";
}
}
} else {
debug "Unknown question id: <$question>";
}
}
} else {
debug "Unknown student id: <$student>";
}
$frac++;
$self->progression('fraction',0.5*$frac/($#s+1));
}
$scoring_file=$self->{'data'}->directory;
$scoring_file =~ s:/[^/]+/?$:/notes.xml:;
return if(!-f $scoring_file);
$frac=0;
$xml=XMLin($scoring_file,ForceArray => 1,KeyAttr=> [ 'id' ]);
$self->variable('darkness_threshold',$xml->{'seuil'});
$self->variable('mark_floor',$xml->{'notemin'});
$self->variable('mark_max',$xml->{'notemax'});
$self->variable('ceiling',$xml->{'plafond'});
$self->variable('rounding',$xml->{'arrondi'});
$self->variable('granularity',$xml->{'grain'});
@s=(keys %{$xml->{'copie'}});
for my $student (@s) {
my $s=$xml->{'copie'}->{$student};
if($student =~ /^(moyenne|max)$/) {
debug "Skipping student <$student>";
} elsif($student =~ /^[0-9]+$/) {
$self->statement('NEWMark')
->execute($student,0,
map { $s->{'total'}->[0]->{$_} } (qw/total max note/));
for my $title (keys %{$s->{'question'}}) {
my $q=$s->{'question'}->{$title};
my $question=$self->question_number($title);
$self->statement('NEWScore')
->execute($student,0,$question,
$q->{'note'},$q->{'max'},$q->{'raison'});
}
for my $code (keys %{$s->{'code'}}) {
$self->statement('NEWCode')->execute($student,0,$code,
$s->{'code'}->{$code}->{'content'});
}
} else {
debug "WARNING: Unknown student <$student> importing XML marks";
}
$frac++;
$self->progression('fraction',0.5*(1+$frac/($#s+1)));
}
$self->progression('end');
}
# defines all the SQL statements that will be used
sub define_statements {
my ($self)=@_;
my $t_answer=$self->table("answer");
my $t_default=$self->table("default");
my $t_zone=$self->table("zone","capture");
$self->{'statements'}=
{
'NEWdefault'=>{'sql'=>"INSERT INTO $t_default"
." (type,strategy) VALUES (?,?)"},
'getDefault'=>{'sql'=>"SELECT strategy FROM $t_default"
." WHERE type=?"},
'setDefault'=>{'sql'=>"UPDATE $t_default"
." SET strategy=? WHERE type=?"},
'noDefault'=>{'sql'=>"UPDATE $t_default"
." SET strategy=''"},
'NEWMain'=>{'sql'=>"INSERT INTO ".$self->table("main")
." (student,strategy) VALUES (?,?)"},
'getMain'=>{'sql'=>"SELECT strategy FROM ".$self->table("main")
." WHERE student=?"},
'getAllMain'=>{'sql'=>"SELECT strategy FROM ".$self->table("main")
." WHERE student=? OR student=-1 OR student=0 ORDER BY student"},
'setMain'=>{'sql'=>"UPDATE ".$self->table("main")
." SET strategy=? WHERE student=?"},
'NEWTitle'=>{'sql'=>"INSERT INTO ".$self->table("title")
." (question,title) VALUES (?,?)"},
'getTitle'=>{'sql'=>"SELECT title FROM ".$self->table("title")
." WHERE question=?"},
'getQNumber'=>{'sql'=>"SELECT question FROM ".$self->table("title")
." WHERE title=?"},
'setTitle'=>{'sql'=>"UPDATE ".$self->table("title")
." SET title=? WHERE question=?"},
'NEWQuestion'=>{'sql'=>"INSERT OR REPLACE INTO ".$self->table("question")
." (student,question,type,indicative,strategy)"
." VALUES (?,?,?,?,?)"},
'NEWAnswer'=>{'sql'=>"INSERT INTO ".$self->table("answer")
." (student,question,answer,correct,strategy)"
." VALUES (?,?,?,?,?)"},
'setAnswerStrat'=>{'sql'=>"UPDATE ".$self->table("answer")
." SET strategy=? WHERE student=? AND question=? AND answer=?"},
'addAnswerStrat'=>{'sql'=>"UPDATE ".$self->table("answer")
." SET strategy=strategy||? WHERE student=? AND question=? AND answer=?"},
'NEWAlias'=>{'sql'=>"INSERT INTO ".$self->table("alias")
." (student,see) VALUES (?,?)"},
'getAlias'=>{'sql'=>"SELECT see FROM ".$self->table("alias")
." WHERE student=?"},
'postCorrectNew'=>{'sql'=>"CREATE TEMPORARY TABLE IF NOT EXISTS"
." pc_temp (q INTEGER, a INTEGER, c REAL, PRIMARY KEY(q,a))"},
'postCorrectClr'=>{'sql'=>"DELETE FROM pc_temp"},
'postCorrectPop'=>{'sql'=>"INSERT INTO pc_temp (q,a,c) "
." SELECT id_a,id_b,CASE"
." WHEN manual >= 0 THEN manual"
." WHEN total<=0 THEN -1"
." WHEN black >= ? * total THEN 1"
." ELSE 0"
." END"
." FROM ".$self->table("zone","capture")
." WHERE capture_zone.student=? AND capture_zone.copy=? AND capture_zone.type=?"},
'postCorrectSet'=>{'sql'=>"UPDATE ".$self->table("answer")
." SET correct=(SELECT c FROM pc_temp"
." WHERE q=question AND a=answer)"},
'postCorrect'=>{'sql'=>"UPDATE ".$self->table("answer")
." SET correct="
."(SELECT CASE"
." WHEN manual >= 0 THEN manual"
." WHEN total<=0 THEN -1"
." WHEN black >= ? * total THEN 1"
." ELSE 0"
." END AS ticked FROM ".$self->table("zone","capture")
." WHERE capture_zone.id_a=scoring_answer.question AND capture_zone.id_b=scoring_answer.answer"
." AND capture_zone.student=? AND capture_zone.copy=? AND capture_zone.type=?)"},
'NEWScore'=>{'sql'=>"INSERT INTO ".$self->table("score")
." (student,copy,question,score,max,why)"
." VALUES (?,?,?,?,?,?)"},
'cancelScore'=>{'sql'=>"UPDATE ".$self->table("score")
." SET why=? WHERE student=? AND copy=? AND question=?"},
'NEWMark'=>{'sql'=>"INSERT INTO ".$self->table("mark")
." (student,copy,total,max,mark)"
." VALUES (?,?,?,?,?)"},
'NEWCode'=>{'sql'=>"INSERT INTO ".$self->table("code")
." (student,copy,code,value)"
." VALUES (?,?,?,?)"},
'studentMark'=>{'sql'=>"SELECT * FROM ".$self->table("mark")
." WHERE student=? AND copy=?"},
'marks'=>{'sql'=>"SELECT * FROM ".$self->table("mark")},
'marksCount'=>{'sql'=>"SELECT COUNT(*) FROM ".$self->table("mark")},
'codes'=>{'sql'=>"SELECT code FROM ".$self->table("code")
." GROUP BY code ORDER BY code"},
'qStrat'=>{'sql'=>"SELECT strategy FROM ".$self->table("question")
." WHERE student=? AND question=?"},
'aStrat'=>{'sql'=>"SELECT strategy FROM ".$self->table("answer")
." WHERE student=? AND question=? AND answer=?"},
'answers'=>{'sql'=>"SELECT answer FROM ".$self->table("answer")
." WHERE student=? AND question=?"
." ORDER BY answer"},
'studentQuestions'=>{'sql'=>"SELECT question FROM ".$self->table("question")
." WHERE student=?"},
'questions'=>{'sql'=>"SELECT question,title FROM ".$self->table("title")
." ORDER BY title"},
'qMaxMax'=>{'sql'=>"SELECT MAX(max) FROM ".$self->table("score")
." WHERE question=?"},
'correct'=>{'sql'=>"SELECT correct FROM ".$self->table("answer")
." WHERE student=? AND question=? AND answer=?"},
'correctForAll'=>{'sql'=>"SELECT question,answer,"
." MIN(correct) AS correct_min,"
." MAX(correct) AS correct_max "
." FROM ".$self->table("answer")
." GROUP BY question,answer"},
'multiple'=>{'sql'=>"SELECT type FROM ".$self->table("question")
." WHERE student=? AND question=?"},
'indicative'=>{'sql'=>"SELECT indicative FROM ".$self->table("question")
." WHERE student=? AND question=?"},
'numQIndic'=>{'sql'=>"SELECT COUNT(*) FROM"
." ( SELECT question FROM ".$self->table("question")
." WHERE indicatve=? GROUP BY question)"},
'oneIndic'=>{'sql'=>"SELECT COUNT(*) FROM ".$self->table("question")
." WHERE question=? AND indicative=?"},
'getScore'=>{'sql'=>"SELECT score FROM ".$self->table("score")
." WHERE student=? AND copy=? AND question=?"},
'getScoreC'=>{'sql'=>"SELECT score,max,why FROM ".$self->table("score")
." WHERE student=? AND copy=? AND question=?"},
'getCode'=>{'sql'=>"SELECT value FROM ".$self->table("code")
." WHERE student=? AND copy=? AND code=?"},
'codesCounts'=>{'sql'=>"SELECT student,copy,value,COUNT(*) as nb"
." FROM ".$self->table("code")
." WHERE code=? GROUP BY value"},
'preAssocCounts'=>
{'sql'=>"SELECT m.student,m.copy,l.id AS value,COUNT(*) AS nb"
." FROM ".$self->table("mark")." AS m"
." , ".$self->table("association","layout")." AS l"
." ON m.student=l.student AND m.copy=0"
." GROUP BY l.id"},
'avgMark'=>{'sql'=>"SELECT AVG(mark) FROM ".$self->table("mark")
." WHERE NOT (student=? AND copy=?)"},
'avgQuest'=>{'sql'=>"SELECT CASE"
." WHEN SUM(max)>0 THEN 100*SUM(score)/SUM(max)"
." ELSE '-' END"
." FROM ".$self->table("score")
." WHERE question=?"
." AND NOT (student=? AND copy=?)"},
'studentAnswersBase'=>
{'sql'=>"SELECT question,answer"
.",correct,strategy"
.",(SELECT CASE"
." WHEN manual >= 0 THEN manual"
." WHEN total<=0 THEN -1"
." WHEN black >= ? * total THEN 1"
." ELSE 0"
." END FROM $t_zone"
." WHERE $t_zone.student=? AND $t_zone.copy=? AND $t_zone.type=?"
." AND $t_zone.id_a=$t_answer.question AND $t_zone.id_b=$t_answer.answer"
." ) AS ticked"
." FROM ".$self->table("answer")
." WHERE student=?"},
'studentQuestionsBase'=>
{'sql'=>"SELECT q.question,q.type,q.indicative,q.strategy,t.title"
.",d.strategy AS default_strategy"
." FROM ".$self->table("question"). " q"
." LEFT OUTER JOIN ".$self->table("default")." d"
." ON q.type=d.type"
." LEFT OUTER JOIN ".$self->table("title")." t"
." ON q.question=t.question"
." WHERE student=?"},
'deleteScores'=>{'sql'=>"DELETE FROM ".$self->table('score')
." WHERE student=? AND copy=?"},
'deleteMarks'=>{'sql'=>"DELETE FROM ".$self->table('mark')
." WHERE student=? AND copy=?"},
'deleteCodes'=>{'sql'=>"DELETE FROM ".$self->table('code')
." WHERE student=? AND copy=?"},
};
}
# default_strategy($type) returns the default scoring strategy string
# to be used for questions with type $type (QUESTION_SIMPLE or
# QUESTION_MULT).
#
# default_strategy($type,$strategy) sets the default strategy string
# for questions with type $type.
sub default_strategy {
my ($self,$type,$strategy)=@_;
if(defined($strategy)) {
$self->statement('setDefault')->execute($strategy,$type);
} else {
return($self->sql_single($self->statement('getDefault'),$type));
}
}
# main_strategy($student) returns the main scoring strategy string for
# student $student. If $student<=0 (-1 in the database), this refers
# to the argument of the \scoring command used outside the
# onecopy/examcopy loop. If $student>0, this refers to the argument of
# the \scoring command used inside the onecopy/examcopy loop, but
# outside question/questionmult environments.
#
# main_strategy($student,$strategy) sets the main scoring strategy
# string.
sub main_strategy {
my ($self,$student,$strategy)=@_;
$student=-1 if($student<=0);
if(defined($strategy)) {
if(defined($self->main_strategy($student))) {
$self->statement('setMain')->execute($strategy,$student);
} else {
$self->statement('NEWMain')->execute($student,$strategy);
}
} else {
return($self->sql_single($self->statement('getMain'),$student));
}
}
#add_main_strategy($student,$strategy) adds the strategy string at the
#end of the student's main strategy string.
sub add_main_strategy {
my ($self,$student,$strategy)=@_;
$student=-1 if($student<=0);
my $old=$self->main_strategy($student);
if(defined($old)) {
$self->statement('setMain')->execute($old.','.$strategy,$student);
} else {
$self->statement('NEWMain')->execute($student,$strategy);
}
}
# main_strategy_all($student) returns a concatenation of the the main
# strategies for student=-1, student=0 and student=$student.
sub main_strategy_all {
my ($self,$student)=@_;
return(join(',',$self->sql_list($self->statement('getAllMain'),$student)));
}
# new_question($student,$question,$type,$indicative,$strategy) adds a
# question in the database, giving its characteristics
sub new_question {
my ($self,$student,$question,$type,$indicative,$strategy)=@_;
$self->statement('NEWQuestion')->execute
($student,$question,$type,$indicative,$strategy);
}
# question_strategy($student,$question) returns the scoring strategy
# string for a particlar question: argument of the \scoring command
# used inside a question/questionmult environment, before the
# \correctchoice and \wrongchoice commands.
sub question_strategy {
my ($self,$student,$question)=@_;
return($self->sql_single($self->statement('qStrat'),$student,$question));
}
# new_answer($student,$question,$answer,$correct,$strategy) adds an
# answer in the database, giving its characteristics
sub new_answer {
my ($self,$student,$question,$answer,$correct,$strategy)=@_;
$self->statement('NEWAnswer')->execute
($student,$question,$answer,$correct,$strategy);
}
# answer_strategy($student,$question,$answer) returns the scoring
# strategy string for a particular answer: argument of the \scoring
# command used after \correctchoice and \wrongchoice commands.
sub answer_strategy {
my ($self,$student,$question,$answer)=@_;
return($self->sql_single($self->statement('aStrat'),$student,$question,$answer));
}
# answers($student,$question) returns an ordered list of answers
# numbers for a particular question. Answer number 0, placed at the
# end, corresponds to the answer "None of the above", when present.
sub answers {
my ($self,$student,$question)=@_;
my @a=$self->sql_list($self->statement('answers'),$student,$question);
if($a[0]==0) {
shift @a;
push @a,0;
}
return(@a);
}
# correct_answer($student,$question,$answer) returns 1 if the
# corresponding box has to be ticked (the answer is a correct one),
# and 0 if not.
sub correct_answer {
my ($self,$student,$question,$answer)=@_;
return($self->sql_single($self->statement('correct'),
$student,$question,$answer));
}
# correct_for_all() returns a reference to an array like
#
# [{question=>1,answer=>1,correct_min=>0,correct_max=>0},
# {question=>1,answer=>2,correct_min=>1,correct_max=>1},
# ]
#
# This gives, for each question/answer, the minumum and maximum of the
# <correct> column for all students. Usualy, minimum and maximum are
# equal because the answer is either correct for all students either
# not correct for all students, but one can also encounter
# correct_min=0 and correct_max=1, in situations where the answers are
# not the same for all students (for example for questions with random
# numerical values).
sub correct_for_all {
my ($self,$question,$answer)=@_;
return($self->dbh->selectall_arrayref($self->statement('correctForAll'),
{Slice=>{}}));
}
# multiple($student,$question) returns 1 if the corresponding
# question is multiple (type=QUESTION_MULT), and 0 if not.
sub multiple {
my ($self,$student,$question)=@_;
return($self->sql_single($self->statement('multiple'),
$student,$question) == QUESTION_MULT);
}
# correct_answer($student,$question) returns 1 if the corresponding
# question is indicative (use of \QuestionIndicative), and 0 if not.
sub indicative {
my ($self,$student,$question)=@_;
return($self->sql_single($self->statement('indicative'),
$student,$question));
}
# one_indicative($question,$indic) returns the number of students for
# which the question has indicative=$indic. In fact, a single question
# SHOULD be indicative for all students, or for none...
sub one_indicative {
my ($self,$question,$indic)=@_;
$indic=1 if(!defined($indic));
return($self->sql_single($self->statement('oneIndic'),$question,$indic));
}
# num_questions_indic($i) returns the number of questions that have
# indicative=$i ($i is 0 or 1).
sub num_questions_indic {
my ($self,$indicative)=@_;
return($self->sql_single($self->statement('numQIndic'),$indicative));
}
# question_title($question) returns a question title.
#
# question_title($question,$title) sets a question title.
sub question_title {
my ($self,$question,$title)=@_;
if(defined($title)) {
if(defined($self->question_title($question))) {
$self->statement('setTitle')->execute($title,$question);
} else {
$self->statement('NEWTitle')->execute($question,$title);
}
} else {
return($self->sql_single($self->statement('getTitle'),$question));
}
}
# question_number($title) returns the question number corresponding to
# the given title.
sub question_number {
my ($self,$title)=@_;
return($self->sql_single($self->statement('getQNumber'),$title));
}
# question_maxmax($question) returns the maximum of the max value for
# question $question accross all students sheets
sub question_maxmax {
my ($self,$question)=@_;
return($self->sql_single($self->statement('qMaxMax'),$question));
}
# clear_strategy clears all data concerning the scoring strategy of
# the exam.
sub clear_strategy {
my ($self)=@_;
$self->clear_variables;
$self->statement('noDefault')->execute;
for my $t (qw/title main question answer alias/) {
$self->sql_do("DELETE FROM ".$self->table($t));
}
}
# clear_score clears all data concerning the scores/marks of the
# students.
sub clear_score {
my ($self)=@_;
for my $t (qw/score mark code/) {
$self->sql_do("DELETE FROM ".$self->table($t));
}
}
# set_answer_strategy($student,$question,$answer,$strategy) sets the
# scoring strategy string associated to a particular answer.
sub set_answer_strategy {
my ($self,$student,$question,$answer,$strategy)=@_;
$self->statement('setAnswerStrat')->execute($strategy,$student,$question,$answer);
}
# add_answer_strategy($student,$question,$answer,$strategy) adds the
# scoring strategy string to a particular answer's one.
sub add_answer_strategy {
my ($self,$student,$question,$answer,$strategy)=@_;
$self->statement('addAnswerStrat')->execute(",".$strategy,
$student,$question,$answer);
}
# replicate($see,$student) tells that the scoring strategy used for
# student $see has to be also used for student $student. This can be
# used only when the questions/answers are not different from a sheet
# to another (contrary to the use of random numerical values for
# exemple).
sub replicate {
my ($self,$see,$student)=@_;
$self->statement('NEWAlias')->execute($student,$see);
}
# unalias($student) gives the student number where to find scoring
# strategy for student $student (following a replicate path if
# present -- see previous method).
sub unalias {
my ($self,$student)=@_;
my $s=$student;
do {
$student=$s;
$s=$self->sql_single($self->statement('getAlias'),$student);
} while(defined($s));
return($student);
}
# postcorrect($student,$copy,$darkness_threshold) uses the ticked
# values from the copy ($student,$copy) (filled by a teacher) to
# determine which answers are correct for all sheets. This can be used
# only when the questions/answers are not different from a sheet to
# another (contrary to the use of random numerical values for
# exemple).
#
# Here are two SQL implementations for postcorrect: postcorrect_a acts
# with a single SQL request, whereas postcorrect_b builds a temporary
# table and requires several SQL requests. postcorrect_b is usualy the
# fastest, so that postcorrect is only a relay to postcorrect_b. Note
# that an UPDATE request on a JOINture should be a good idea, but this
# is not allowed by SQLite.
sub postcorrect_a {
my ($self,$student,$copy,$darkness_threshold)=@_;
$self->{'data'}->require_module('capture');
$self->statement('postCorrect')
->execute($darkness_threshold,$student,$copy,ZONE_BOX);
}
sub postcorrect_b {
my ($self,$student,$copy,$darkness_threshold)=@_;
$self->{'data'}->require_module('capture');
$self->statement('postCorrectNew')->execute();
$self->statement('postCorrectClr')->execute();
$self->statement('postCorrectPop')
->execute($darkness_threshold,$student,$copy,ZONE_BOX);
$self->statement('postCorrectSet')->execute();
}
sub postcorrect {
my ($self,@args)=@_;
$self->postcorrect_b(@args);
}
# new_score($student,$copy,$question,$score,$score_max,$why) adds a
# question score row.
sub new_score {
my ($self,$student,$copy,$question,$score,$score_max,$why)=@_;
$self->statement('NEWScore')
->execute($student,$copy,$question,$score,$score_max,$why);
}
# cancel_score($student,$copy,$question) cancels scoring (sets the
# score and maximum score to zero) for this question.
sub cancel_score {
my ($self,$student,$copy,$question)=@_;
$self->statement('cancelScore')
->execute('C',$student,$copy,$question);
}
# new_mark($student,$copy,$total,$max,$mark) adds a mark row.
sub new_mark {
my ($self,$student,$copy,$total,$max,$mark)=@_;
$self->statement('NEWMark')
->execute($student,$copy,$total,$max,$mark);
}
# new_code($student,$copy,$code,$value) adds a code row.
sub new_code {
my ($self,$student,$copy,$code,$value)=@_;
$self->statement('NEWCode')
->execute($student,$copy,$code,$value);
}
# student_questions($student) returns a list of the question numbers
# used in the sheets for student number $student.
sub student_questions {
my ($self,$student)=@_;
return($self->sql_list($self->statement('studentQuestions'),
$student));
}
# questions returns an array of pointers (one for each question) to
# hashes ('question'=><question_number>,'title'=>'question_title').
sub questions {
my ($self)=@_;
return(@{$self->dbh->selectall_arrayref($self->statement('questions'),{Slice=>{}})});
}
# average_mark returns the average mark from all students marks.
sub average_mark {
my ($self)=@_;
my @pc=$self->postcorrect_sc;
return($self->sql_single($self->statement('avgMark'),@pc));
}
# codes returns a list of codes names.
sub codes {
my ($self)=@_;
return($self->sql_list($self->statement('codes')));
}
# marks returns a pointer to an array of pointers (one for each
# student) to hashes giving all information from the mark table.
sub marks {
my ($self)=@_;
return(@{$self->dbh->selectall_arrayref($self->statement('marks'),{Slice=>{}})});
}
# marks_count returns the nmber of marks computed.
sub marks_count {
my ($self)=@_;
return($self->sql_single($self->statement('marksCount')));
}
# question_score($student,$copy,$question) returns the score of a
# particular student for a particular question.
sub question_score {
my ($self,$student,$copy,$question)=@_;
return($self->sql_single($self->statement('getScore'),
$student,$copy,$question));
}
# question_result($student,$copy,$question) returns a pointer to a
# hash ('score'=>XXX,'max'=>XXX,'why'=>XXX) extracted from the
# question table.
sub question_result {
my ($self,$student,$copy,$question)=@_;
my $sth=$self->statement('getScoreC');
$sth->execute($student,$copy,$question);
return($sth->fetchrow_hashref);
}
# student_code($student,$copy,$code) returns the value of the code
# named $code entered by a particular student.
sub student_code {
my ($self,$student,$copy,$code)=@_;
return($self->sql_single($self->statement('getCode'),
$student,$copy,$code));
}
# postcorrect_sc returns (postcorrect_student,postcorrect_copy), or
# (0,0) if not in postcorrect mode.
sub postcorrect_sc {
my ($self)=@_;
return($self->variable('postcorrect_student') || 0,
$self->variable('postcorrect_copy') || 0);
}
# question_average($question) returns the average (as a percentage of
# the maximum score, from 0 to 100) of the scores for a particular
# question.
sub question_average {
my ($self,$question)=@_;
my @pc=$self->postcorrect_sc;
return($self->sql_single($self->statement('avgQuest'),$question,
@pc));
}
# student_global($student,$copy) returns a pointer to a hash
# ('student'=>XXX,'copy'=>XXX,'total'=>XXX,'max'=>XXX,'mark'=>XXX)
# extracted from the mark table.
sub student_global {
my ($self,$student,$copy)=@_;
my $sth=$self->statement('studentMark');
$sth->execute($student,$copy);
return($x=$sth->fetchrow_hashref);
}
# student_scoring_base($student,$copy,$darkness_threshold) returns
# useful data to compute questions scores for a particular student
# (identified by $student and $copy), as a reference to a hash
# grouping questions and answers. For exemple :
#
# 'main_strategy'=>"",
# 'questions'=>
# { 1 =>{ 'question'=>1,
# 'type'=>1,
# 'indicative'=>0,
# 'strategy'=>'',
# 'answers'=>[ { 'question'=>1, 'answer'=>1,
# 'correct'=>1, 'ticked'=>0, 'strategy'=>"b=2" },
# {'question'=>1, 'answer'=>2,
# 'correct'=>0, 'ticked'=>0, 'strategy'=>"" },
# ],
# },
# ...
# }
sub student_scoring_base {
my ($self,$student,$copy,$darkness_threshold)=@_;
$self->{'data'}->require_module('capture');
my $student_strategy=$self->unalias($student);
my $r={'student_alias'=>$student_strategy,
'questions'=>{},
'main_strategy'=>$self->main_strategy_all($student_strategy)};
my @sid=($student);
push @sid,$student_strategy if($student != $student_strategy);
for my $s (@sid) {
my $sth;
$sth=$self->statement('studentQuestionsBase');
$sth->execute($s);
while(my $qa=$sth->fetchrow_hashref) {
$r->{'questions'}->{$qa->{'question'}}=$qa;
}
$sth=$self->statement('studentAnswersBase');
$sth->execute($darkness_threshold,$student,$copy,ZONE_BOX,$s);
while(my $qa=$sth->fetchrow_hashref) {
push @{$r->{'questions'}->{$qa->{'question'}}->{'answers'}},$qa;
}
}
return($r);
}
# delete_scoring_data($student,$copy) deletes all scoring data
# relative to a particular answer sheet.
sub delete_scoring_data {
my ($self,$student,$copy)=@_;
for my $part (qw/Scores Marks Codes/) {
$self->statement('delete'.$part)->execute($student,$copy);
}
}
1;
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