#
# This file is part of Koha.
#
-# Koha 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.
+# Koha 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 3 of the License, or
+# (at your option) any later version.
#
-# Koha 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.
+# Koha 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 Koha; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <http://www.gnu.org/licenses>.
use strict;
use warnings;
-use Carp;
+use Carp qw( carp );
use Exporter;
use C4::Context;
-use C4::Debug;
+use Module::Load::Conditional qw( check_install );
#use Data::Dumper;
+use constant TAG_FIELDS => qw(tag_id borrowernumber biblionumber term language date_created);
+use constant TAG_SELECT => "SELECT " . join(',', TAG_FIELDS) . "\n FROM tags_all\n";
-use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
-use vars qw($ext_dict $select_all @fields);
-
+our (@ISA, @EXPORT_OK);
BEGIN {
- $VERSION = 3.07.00.049;
- @ISA = qw(Exporter);
- @EXPORT_OK = qw(
- &get_tag &get_tags &get_tag_rows
- &add_tags &add_tag
- &delete_tag_row_by_id
- &remove_tag
- &delete_tag_rows_by_ids
- &rectify_weights
- &get_approval_rows
- &blacklist
- &whitelist
- &is_approved
- &approval_counts
- &get_count_by_tag_status
- &get_filters
- );
- # %EXPORT_TAGS = ();
- $ext_dict = C4::Context->preference('TagsExternalDictionary');
- if ($debug) {
- require Data::Dumper;
- import Data::Dumper qw(:DEFAULT);
- print STDERR __PACKAGE__ . " external dictionary = " . ($ext_dict||'none') . "\n";
- }
+ @ISA = qw(Exporter);
+ @EXPORT_OK = qw(
+ get_tag get_tags get_tag_rows
+ add_tags
+ add_tag
+ add_tag_approval
+ add_tag_index
+ delete_tag_row_by_id
+ remove_tag
+ delete_tag_rows_by_ids
+ get_approval_rows
+ blacklist
+ whitelist
+ is_approved
+ approval_counts
+ get_count_by_tag_status
+ get_filters
+ stratify_tags
+ );
+ my $ext_dict = C4::Context->preference('TagsExternalDictionary');
+ if ( $ext_dict && ! check_install( module => 'Lingua::Ispell' ) ) {
+ warn "Ignoring TagsExternalDictionary, because Lingua::Ispell is not installed.";
+ $ext_dict = q{};
+ }
if ($ext_dict) {
require Lingua::Ispell;
- import Lingua::Ispell qw(spellcheck add_word_lc save_dictionary);
+ import Lingua::Ispell qw(spellcheck add_word_lc);
+ $Lingua::Ispell::path = $ext_dict;
}
}
-INIT {
- $ext_dict and $Lingua::Ispell::path = $ext_dict;
- $debug and print STDERR "\$Lingua::Ispell::path = $Lingua::Ispell::path\n";
- @fields = qw(tag_id borrowernumber biblionumber term language date_created);
- $select_all = "SELECT " . join(',',@fields) . "\n FROM tags_all\n";
-}
+=head1 C4::Tags.pm - Support for user tagging of biblios.
+
+=cut
sub get_filters {
my $query = "SELECT * FROM tags_filters ";
$sth->execute;
my $result = $sth->fetchrow_hashref();
$result->{approved_total} = $result->{approved_count} + $result->{rejected_count} + $result->{unapproved_count};
- $debug and warn "counts returned: " . Dumper $result;
return $result;
}
}
sub remove_tag {
- my $tag_id = shift or return undef;
+ my $tag_id = shift or return;
my $user_id = (@_) ? shift : undef;
my $rows = (defined $user_id) ?
get_tag_rows({tag_id=>$tag_id, borrowernumber=>$user_id}) :
get_tag_rows({tag_id=>$tag_id}) ;
$rows or return 0;
- (scalar(@$rows) == 1) or return undef; # should never happen (duplicate ids)
+ (scalar(@$rows) == 1) or return; # should never happen (duplicate ids)
my $row = shift(@$rows);
($tag_id == $row->{tag_id}) or return 0;
my $tags = get_tags({term=>$row->{term}, biblionumber=>$row->{biblionumber}});
my $index = shift(@$tags);
- $debug and print STDERR
- sprintf "remove_tag: tag_id=>%s, biblionumber=>%s, weight=>%s, weight_total=>%s\n",
- $row->{tag_id}, $row->{biblionumber}, $index->{weight}, $index->{weight_total};
if ($index->{weight} <= 1) {
delete_tag_index($row->{term},$row->{biblionumber});
} else {
}
sub delete_tag_index {
- (@_) or return undef;
+ (@_) or return;
my $sth = C4::Context->dbh->prepare("DELETE FROM tags_index WHERE term = ? AND biblionumber = ? LIMIT 1");
$sth->execute(@_);
return $sth->rows || 0;
}
sub delete_tag_approval {
- (@_) or return undef;
+ (@_) or return;
my $sth = C4::Context->dbh->prepare("DELETE FROM tags_approval WHERE term = ? LIMIT 1");
$sth->execute(shift);
return $sth->rows || 0;
}
sub delete_tag_row_by_id {
- (@_) or return undef;
+ (@_) or return;
my $sth = C4::Context->dbh->prepare("DELETE FROM tags_all WHERE tag_id = ? LIMIT 1");
$sth->execute(shift);
return $sth->rows || 0;
}
sub delete_tag_rows_by_ids {
- (@_) or return undef;
+ (@_) or return;
my $i=0;
foreach(@_) {
$i += delete_tag_row_by_id($_);
sub get_tag_rows {
my $hash = shift || {};
- my @ok_fields = @fields;
+ my @ok_fields = TAG_FIELDS;
push @ok_fields, 'limit'; # push the limit! :)
my $wheres;
my $limit = "";
my @exe_args = ();
foreach my $key (keys %$hash) {
- $debug and print STDERR "get_tag_rows arg. '$key' = ", $hash->{$key}, "\n";
unless (length $key) {
carp "Empty argument key to get_tag_rows: ignoring!";
next;
}
- unless (1 == scalar grep {/^ $key $/x} @ok_fields) {
+ unless (1 == scalar grep { $_ eq $key } @ok_fields) {
carp "get_tag_rows received unreconized argument key '$key'.";
next;
}
push @exe_args, $hash->{$key};
}
}
- my $query = $select_all . ($wheres||'') . $limit;
- $debug and print STDERR "get_tag_rows query:\n $query\n",
- "get_tag_rows query args: ", join(',', @exe_args), "\n";
+ my $query = TAG_SELECT . ($wheres||'') . $limit;
my $sth = C4::Context->dbh->prepare($query);
if (@exe_args) {
$sth->execute(@exe_args);
my $order = "";
my @exe_args = ();
foreach my $key (keys %$hash) {
- $debug and print STDERR "get_tags arg. '$key' = ", $hash->{$key}, "\n";
unless (length $key) {
carp "Empty argument key to get_tags: ignoring!";
next;
}
- unless (1 == scalar grep {/^ $key $/x} @ok_fields) {
+ unless (1 == scalar grep { $_ eq $key } @ok_fields) {
carp "get_tags received unreconized argument key '$key'.";
next;
}
LEFT JOIN tags_approval
ON tags_index.term = tags_approval.term
" . ($wheres||'') . $order . $limit;
- $debug and print STDERR "get_tags query:\n $query\n",
- "get_tags query args: ", join(',', @exe_args), "\n";
my $sth = C4::Context->dbh->prepare($query);
if (@exe_args) {
$sth->execute(@exe_args);
my $order = "";
my @exe_args = ();
foreach my $key (keys %$hash) {
- $debug and print STDERR "get_approval_rows arg. '$key' = ", $hash->{$key}, "\n";
unless (length $key) {
carp "Empty argument key to get_approval_rows: ignoring!";
next;
}
- unless (1 == scalar grep {/^ $key $/x} @ok_fields) {
+ unless (1 == scalar grep { $_ eq $key } @ok_fields) {
carp "get_approval_rows received unreconized argument key '$key'.";
next;
}
LEFT JOIN borrowers
ON tags_approval.approved_by = borrowers.borrowernumber ";
$query .= ($wheres||'') . $order . $limit;
- $debug and print STDERR "get_approval_rows query:\n $query\n",
- "get_approval_rows query args: ", join(',', @exe_args), "\n";
my $sth = C4::Context->dbh->prepare($query);
if (@exe_args) {
$sth->execute(@exe_args);
}
sub is_approved {
- my $term = shift or return undef;
+ my $term = shift or return;
my $sth = C4::Context->dbh->prepare("SELECT approved FROM tags_approval WHERE term = ?");
$sth->execute($term);
+ my $ext_dict = C4::Context->preference('TagsExternalDictionary');
unless ($sth->rows) {
$ext_dict and return (spellcheck($term) ? 0 : 1); # spellcheck returns empty on OK word
return 0;
}
sub get_tag_index {
- my $term = shift or return undef;
+ my $term = shift or return;
my $sth;
if (@_) {
$sth = C4::Context->dbh->prepare("SELECT * FROM tags_index WHERE term = ? AND biblionumber = ?");
sub whitelist {
my $operator = shift;
- defined $operator or return undef; # have to test defined to allow =0 (kohaadmin)
+ defined $operator or return; # have to test defined to allow =0 (kohaadmin)
+ my $ext_dict = C4::Context->preference('TagsExternalDictionary');
if ($ext_dict) {
foreach (@_) {
spellcheck($_) or next;
# a term mistakenly, you can still reverse it. But there is no going back to "neutral".
sub blacklist {
my $operator = shift;
- defined $operator or return undef; # have to test defined to allow =0 (kohaadmin)
+ defined $operator or return; # have to test defined to allow =0 (kohaadmin)
foreach (@_) {
my $aref = get_approval_rows({term=>$_});
if ($aref and scalar @$aref) {
}
sub add_filter {
my $operator = shift;
- defined $operator or return undef; # have to test defined to allow =0 (kohaadmin)
+ defined $operator or return; # have to test defined to allow =0 (kohaadmin)
my $query = "INSERT INTO tags_blacklist (regexp,y,z) VALUES (?,?,?)";
# my $sth = C4::Context->dbh->prepare($query);
return scalar @_;
}
sub remove_filter {
my $operator = shift;
- defined $operator or return undef; # have to test defined to allow =0 (kohaadmin)
+ defined $operator or return; # have to test defined to allow =0 (kohaadmin)
my $query = "REMOVE FROM tags_blacklist WHERE blacklist_id = ?";
# my $sth = C4::Context->dbh->prepare($query);
# $sth->execute($term);
}
sub add_tag_approval { # or disapproval
- $debug and warn "add_tag_approval(" . join(", ",map {defined($_) ? $_ : 'UNDEF'} @_) . ")";
- my $term = shift or return undef;
+ my $term = shift or return;
my $query = "SELECT * FROM tags_approval WHERE term = ?";
my $sth = C4::Context->dbh->prepare($query);
$sth->execute($term);
} else {
$query = "INSERT INTO tags_approval (term,date_approved) VALUES (?,NOW())";
}
- $debug and print STDERR "add_tag_approval query: $query\nadd_tag_approval args: (" . join(", ", @exe_args) . ")\n";
$sth = C4::Context->dbh->prepare($query);
$sth->execute(@exe_args);
return $sth->rows;
sub mod_tag_approval {
my $operator = shift;
- defined $operator or return undef; # have to test defined to allow =0 (kohaadmin)
- my $term = shift or return undef;
+ defined $operator or return; # have to test defined to allow =0 (kohaadmin)
+ my $term = shift or return;
my $approval = (scalar @_ ? shift : 1); # default is to approve
my $query = "UPDATE tags_approval SET approved_by=?, approved=?, date_approved=NOW() WHERE term = ?";
- $debug and print STDERR "mod_tag_approval query: $query\nmod_tag_approval args: ($operator,$approval,$term)\n";
my $sth = C4::Context->dbh->prepare($query);
$sth->execute($operator,$approval,$term);
}
sub add_tag_index {
- my $term = shift or return undef;
- my $biblionumber = shift or return undef;
+ my $term = shift or return;
+ my $biblionumber = shift or return;
my $query = "SELECT * FROM tags_index WHERE term = ? AND biblionumber = ?";
my $sth = C4::Context->dbh->prepare($query);
$sth->execute($term,$biblionumber);
($sth->rows) and return increment_weight($term,$biblionumber);
$query = "INSERT INTO tags_index (term,biblionumber) VALUES (?,?)";
- $debug and print STDERR "add_tag_index query: $query\nadd_tag_index args: ($term,$biblionumber)\n";
$sth = C4::Context->dbh->prepare($query);
$sth->execute($term,$biblionumber);
return $sth->rows;
}
sub get_tag { # by tag_id
- (@_) or return undef;
- my $sth = C4::Context->dbh->prepare("$select_all WHERE tag_id = ?");
+ (@_) or return;
+ my $sth = C4::Context->dbh->prepare(TAG_SELECT . "WHERE tag_id = ?");
$sth->execute(shift);
return $sth->fetchrow_hashref;
}
-sub rectify_weights {
- my $dbh = C4::Context->dbh;
- my $sth;
- my $query = "
- SELECT term,biblionumber,count(*) as count
- FROM tags_all
- ";
- (@_) and $query .= " WHERE term =? ";
- $query .= " GROUP BY term,biblionumber ";
- $sth = $dbh->prepare($query);
- if (@_) {
- $sth->execute(shift);
- } else {
- $sth->execute();
- }
- my $results = $sth->fetchall_arrayref({}) or return undef;
- my %tally = ();
- foreach (@$results) {
- _set_weight($_->{count},$_->{term},$_->{biblionumber});
- $tally{$_->{term}} += $_->{count};
- }
- foreach (keys %tally) {
- _set_weight_total($tally{$_},$_);
- }
- return ($results,\%tally);
-}
-
sub increment_weights {
increment_weight(@_);
increment_weight_total(shift);
}
sub add_tag { # biblionumber,term,[borrowernumber,approvernumber]
- my $biblionumber = shift or return undef;
- my $term = shift or return undef;
+ my $biblionumber = shift or return;
+ my $term = shift or return;
my $borrowernumber = (@_) ? shift : 0; # the user, default to kohaadmin
$term =~ s/^\s+//;
$term =~ s/\s+$//;
- ($term) or return undef; # must be more than whitespace
+ ($term) or return; # must be more than whitespace
my $rows = get_tag_rows({biblionumber=>$biblionumber, borrowernumber=>$borrowernumber, term=>$term, limit=>1});
my $query = "INSERT INTO tags_all
(borrowernumber,biblionumber,term,date_created)
VALUES (?,?,?,NOW())";
- $debug and print STDERR "add_tag query: $query\n",
- "add_tag query args: ($borrowernumber,$biblionumber,$term)\n";
if (scalar @$rows) {
- $debug and carp "Duplicate tag detected. Tag not added.";
- return undef;
+ return;
}
# add to tags_all regardless of approaval
my $sth = C4::Context->dbh->prepare($query);
# then
if (scalar @_) { # if arg remains, it is the borrowernumber of the approver: tag is pre-approved.
my $approver = shift;
- $debug and print STDERR "term '$term' pre-approved by borrower #$approver\n";
add_tag_approval($term,$approver,1);
add_tag_index($term,$biblionumber,$approver);
} elsif (is_approved($term) >= 1) {
- $debug and print STDERR "term '$term' approved by whitelist\n";
add_tag_approval($term,0,1);
add_tag_index($term,$biblionumber,1);
} else {
- $debug and print STDERR "term '$term' NOT approved (yet)\n";
add_tag_approval($term);
add_tag_index($term,$biblionumber);
}
}
+# This takes a set of tags, as returned by C<get_approval_rows> and divides
+# them up into a number of "strata" based on their weight. This is useful
+# to display them in a number of different sizes.
+#
+# Usage:
+# ($min, $max) = stratify_tags($strata, $tags);
+# $stratum: the number of divisions you want
+# $tags: the tags, as provided by get_approval_rows
+# $min: the minimum stratum value
+# $max: the maximum stratum value. This may be the same as $min if there
+# is only one weight. Beware of divide by zeros.
+# This will add a field to the tag called "stratum" containing the calculated
+# value.
+sub stratify_tags {
+ my ( $strata, $tags ) = @_;
+ return (0,0) if !@$tags;
+ my ( $min, $max );
+ foreach (@$tags) {
+ my $w = $_->{weight_total};
+ $min = $w if ( !defined($min) || $min > $w );
+ $max = $w if ( !defined($max) || $max < $w );
+ }
+
+ # normalise min to zero
+ $max = $max - $min;
+ my $orig_min = $min;
+ $min = 0;
+
+ # if min and max are the same, just make it 1
+ my $span = ( $strata - 1 ) / ( $max || 1 );
+ foreach (@$tags) {
+ my $w = $_->{weight_total};
+ $_->{stratum} = int( ( $w - $orig_min ) * $span );
+ }
+ return ( $min, $max );
+}
+
1;
__END__
-=head1 C4::Tags.pm - Support for user tagging of biblios.
-
-More verose debugging messages are sent in the presence of non-zero $ENV{"DEBUG"}.
-
=head2 add_tag(biblionumber,term[,borrowernumber])
=head3 TO DO: Add real perldoc
approved - Negative, 0 or positive if tag is rejected, pending or approved.
date_approved - date of last action
approved_by - staffer performing the last action
- weight_total - total occurance of term in any biblio by any users
+ weight_total - total occurrence of term in any biblio by any users
tags_index - This table is for performance, because by far the most common operation will
be fetching tags for a list of search results. We will have a set of biblios, and we will
projects / srvgit / blobdiff