Speed up achievement scoring.

First get all of the necessary achievement data from the database, then
process it and print it to the file.

Comparing scoring all course achievements for all users in a course with
5000 users shows a considerable speed improvement. It takes more than
three minutes for this with the develop branch, and less than 3 seconds
with this pull request.

Obviously the generated scoring files are identical.

Author: drgrice1

lib/WeBWorK/ContentGenerator/Instructor/AchievementList.pm

@@ -234,8 +234,20 @@ sub score_handler ($c) {
 	my $scope               = $c->param('action.score.scope');
 	my @achievementsToScore = $scope eq 'all' ? @{ $c->{allAchievementIDs} } : $c->param('selected_achievements');
 
+	# First get everything that is needed from the database.
+	my @achievements = sortAchievements($db->getAchievements(@achievementsToScore));
+	my @users        = $db->getUsersWhere({ user_id => { not_like => 'set_id:%' } }, [qw(section last_name)]);
+
+	my %globalUserAchievements = map { $_->user_id => $_ } $db->getGlobalUserAchievementsWhere;
+
+	my %userAchievements;
+	for (@achievements) {
+		$userAchievements{ $_->user_id }{ $_->achievement_id } = $_
+			for $db->getUserAchievementsWhere({ achievement_id => $_->achievement_id });
+	}
+
 	# Define file name
-	my $scoreFileName = $courseName . "_achievement_scores.csv";
+	my $scoreFileName = $courseName . '_achievement_scores.csv';
 	my $scoreFilePath = $ce->{courseDirs}{scoring} . '/' . $scoreFileName;
 
 	# Back up existing file
@@ -247,60 +259,41 @@ sub score_handler ($c) {
 	# Check path and open the file
 	$scoreFilePath = surePathToFile($ce->{courseDirs}{scoring}, $scoreFilePath);
 
-	my $SCORE = Mojo::File->new($scoreFilePath)->open('>:encoding(UTF-8)')
-		or return (0, $c->maketext("Failed to open [_1]", $scoreFilePath));
+	my $scoreFile = Mojo::File->new($scoreFilePath)->open('>:encoding(UTF-8)')
+		or return (0, $c->maketext('Failed to open [_1]', $scoreFilePath));
 
 	# Print out header info
-	print $SCORE $c->maketext("username, last name, first name, section, achievement level, achievement score,");
-
-	my @achievements = $db->getAchievements(@achievementsToScore);
-	@achievements = sortAchievements(@achievements);
+	print $scoreFile $c->maketext('username, last name, first name, section, achievement level, achievement score,');
 
 	for my $achievement (@achievements) {
-		print $SCORE $achievement->achievement_id . ", ";
-	}
-	print $SCORE "\n";
-
-	my @users = $db->listUsers;
-
-	# Get user records
-	my @userRecords = ();
-	for my $currentUser (@users) {
-		my $userObj = $db->getUser($currentUser);
-		die "Unable to find user object for $currentUser. " unless $userObj;
-		push(@userRecords, $userObj);
+		print $scoreFile $achievement->achievement_id . ', ';
 	}
-
-	@userRecords =
-		sort { (lc($a->section) cmp lc($b->section)) || (lc($a->last_name) cmp lc($b->last_name)) } @userRecords;
+	print $scoreFile "\n";
 
 	# Print out achievement information for each user
-	for my $userRecord (@userRecords) {
+	for my $userRecord (@users) {
 		my $user_id = $userRecord->user_id;
-		next unless $db->existsGlobalUserAchievement($user_id);
-		next if ($userRecord->{status} eq 'D' || $userRecord->{status} eq 'A');
-		print $SCORE "$user_id, $userRecord->{last_name}, $userRecord->{first_name}, $userRecord->{section}, ";
-		my $globalUserAchievement = $db->getGlobalUserAchievement($user_id);
-		my $level_id              = $globalUserAchievement->level_achievement_id;
-		$level_id = ' ' unless $level_id;
-		my $points = $globalUserAchievement->achievement_points;
-		$points = 0 unless $points;
-		print $SCORE "$level_id, $points, ";
+		next if !$globalUserAchievements{$user_id} || $userRecord->{status} eq 'D' || $userRecord->{status} eq 'A';
+
+		print $scoreFile "$user_id, $userRecord->{last_name}, $userRecord->{first_name}, $userRecord->{section}, ";
+
+		my $level_id = $globalUserAchievements{$user_id}->level_achievement_id || ' ';
+		my $points   = $globalUserAchievements{$user_id}->achievement_points   || 0;
+		print $scoreFile "$level_id, $points, ";
 
 		for my $achievement (@achievements) {
 			my $achievement_id = $achievement->achievement_id;
-			if ($db->existsUserAchievement($user_id, $achievement_id)) {
-				my $userAchievement = $db->getUserAchievement($user_id, $achievement_id);
-				print $SCORE $userAchievement->earned ? "1, " : "0, ";
+			if ($userAchievements{$user_id}{$achievement_id}) {
+				print $scoreFile $userAchievements{$user_id}{$achievement_id}->earned ? '1, ' : '0, ';
 			} else {
-				print $SCORE ", ";
+				print $scoreFile ', ';
 			}
 		}
 
-		print $SCORE "\n";
+		print $scoreFile "\n";
 	}
 
-	$SCORE->close;
+	$scoreFile->close;
 
 	# Include a download link
 	return (