opac/opac-tags.pl

   1 #!/usr/bin/perl
   2
   3 # Copyright 2000-2002 Katipo Communications
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it under the
   8 # terms of the GNU General Public License as published by the Free Software
   9 # Foundation; either version 2 of the License, or (at your option) any later
  10 # version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along
  17 # with Koha; if not, write to the Free Software Foundation, Inc.,
  18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20
  21 =head1 NAME
  22
  23 opac-tags.pl
  24
  25 =head1 DESCRIPTION
  26
  27 TODO :: Description here
  28
  29 C4::Scrubber is used to remove all markup content from the sumitted text.
  30
  31 =cut
  32
  33 use strict;
  34 use warnings;
  35 use CGI;
  36 use CGI::Cookie; # need to check cookies before having CGI parse the POST request
  37
  38 use C4::Auth qw(:DEFAULT check_cookie_auth);
  39 use C4::Context;
  40 use C4::Debug;
  41 use C4::Output 3.02 qw(:html :ajax pagination_bar);
  42 use C4::Scrubber;
  43 use C4::Biblio;
  44 use C4::Tags qw(add_tag get_approval_rows get_tag_rows remove_tag);
  45
  46 my %newtags = ();
  47 my @deltags = ();
  48 my %counts  = ();
  49 my @errors  = ();
  50 my $perBibResults = {};
  51
  52 # Indexes of @errors that do not apply to a particular biblionumber.
  53 my @globalErrorIndexes = ();
  54
  55 sub ajax_auth_cgi {     # returns CGI object
  56         my $needed_flags = shift;
  57         my %cookies = fetch CGI::Cookie;
  58         my $input = CGI->new;
  59         my $sessid = $cookies{'CGISESSID'}->value || $input->param('CGISESSID');
  60         my ($auth_status, $auth_sessid) = check_cookie_auth($sessid, $needed_flags);
  61         $debug and
  62         print STDERR "($auth_status, $auth_sessid) = check_cookie_auth($sessid," . Dumper($needed_flags) . ")\n";
  63         if ($auth_status ne "ok") {
  64                 output_with_http_headers $input, undef,
  65                 "window.alert('Your CGI session cookie ($sessid) is not current.  " .
  66                 "Please refresh the page and try again.');\n", 'js';
  67                 exit 0;
  68         }
  69         $debug and print STDERR "AJAX request: " . Dumper($input),
  70                 "\n(\$auth_status,\$auth_sessid) = ($auth_status,$auth_sessid)\n";
  71         return $input;
  72 }
  73
  74 # The trick here is to support multiple tags added to multiple bilbios in one POST.
  75 # The HTML might not use this, but it makes it more web-servicey from the start.
  76 # So the name of param has to have biblionumber built in.
  77 # For lack of anything more compelling, we just use "newtag[biblionumber]"
  78 # We split the value into tags at comma and semicolon
  79
  80 my $is_ajax = is_ajax();
  81 my $openadds = C4::Context->preference('TagsModeration') ? 0 : 1;
  82 my $query = ($is_ajax) ? &ajax_auth_cgi({}) : CGI->new();
  83 unless (C4::Context->preference('TagsEnabled')) {
  84         push @errors, {+ tagsdisabled=>1 };
  85     push @globalErrorIndexes, $#errors;
  86 } else {
  87         foreach ($query->param) {
  88                 if (/^newtag(.*)/) {
  89                         my $biblionumber = $1;
  90                         unless ($biblionumber =~ /^\d+$/) {
  91                                 $debug and warn "$_ references non numerical biblionumber '$biblionumber'";
  92                                 push @errors, {+'badparam' => $_ };
  93                 push @globalErrorIndexes, $#errors;
  94                                 next;
  95                         }
  96                         $newtags{$biblionumber} = $query->param($_);
  97                 } elsif (/^del(\d+)$/) {
  98                         push @deltags, $1;
  99                 }
 100         }
 101 }
 102
 103 my $add_op = (scalar(keys %newtags) + scalar(@deltags)) ? 1 : 0;
 104 my ($template, $loggedinuser, $cookie);
 105 if ($is_ajax) {
 106         $loggedinuser = C4::Context->userenv->{'number'};  # must occur AFTER auth
 107         $debug and print STDERR "op: $loggedinuser\n";
 108 } else {
 109         ($template, $loggedinuser, $cookie) = get_template_and_user({
 110                 template_name   => "opac-tags.tmpl",
 111                 query           => $query,
 112                 type            => "opac",
 113                 authnotrequired => ($add_op ? 0 : 1),   # auth required to add tags
 114                 debug           => 1,
 115         });
 116 }
 117
 118 if ($add_op) {
 119         unless ($loggedinuser) {
 120                 push @errors, {+'login' => 1 };
 121         push @globalErrorIndexes, $#errors;
 122                 %newtags=();    # zero out any attempted additions
 123                 @deltags=();    # zero out any attempted deletions
 124         }
 125 }
 126
 127 my $scrubber;
 128 my @newtags_keys = (keys %newtags);
 129 if (scalar @newtags_keys) {
 130         $scrubber = C4::Scrubber->new();
 131         foreach my $biblionumber (@newtags_keys) {
 132         my $bibResults = {adds=>0, errors=>[]};
 133                 my @values = split /[;,]/, $newtags{$biblionumber};
 134                 foreach (@values) {
 135                         s/^\s*(.+)\s*$/$1/;
 136                         my $clean_tag = $scrubber->scrub($_);
 137                         unless ($clean_tag eq $_) {
 138                                 if ($clean_tag =~ /\S/) {
 139                                         push @errors, {scrubbed=>$clean_tag};
 140                                         push @{$bibResults->{errors}}, {scrubbed=>$clean_tag};
 141                                 } else {
 142                                         push @errors, {scrubbed_all_bad=>1};
 143                                         push @{$bibResults->{errors}}, {scrubbed_all_bad=>1};
 144                                         next;   # we don't add it if there's nothing left!
 145                                 }
 146                         }
 147                         my $result = ($openadds) ?
 148                                 add_tag($biblionumber,$clean_tag,$loggedinuser,$loggedinuser) : # pre-approved
 149                                 add_tag($biblionumber,$clean_tag,$loggedinuser)   ;
 150                         if ($result) {
 151                                 $counts{$biblionumber}++;
 152                 $bibResults->{adds}++;
 153                         } else {
 154                                 push @errors, {failed_add_tag=>$clean_tag};
 155                                 push @{$bibResults->{errors}}, {failed_add_tag=>$clean_tag};
 156                                 $debug and warn "add_tag($biblionumber,$clean_tag,$loggedinuser...) returned bad result (" . (defined $result ? $result : 'UNDEF') .")";
 157                         }
 158                 }
 159         $perBibResults->{$biblionumber} = $bibResults;
 160         }
 161 }
 162 my $dels = 0;
 163 foreach (@deltags) {
 164         if (remove_tag($_,$loggedinuser)) {
 165                 $dels++;
 166         } else {
 167                 push @errors, {failed_delete=>$_};
 168         }
 169 }
 170
 171 if ($is_ajax) {
 172         my $sum = 0;
 173         foreach (values %counts) {$sum += $_;}
 174         my $js_reply = sprintf("response = {\n\tadded: %d,\n\tdeleted: %d,\n\terrors: %d",$sum,$dels,scalar @errors);
 175
 176     # If no add attempts were made, flag global errors.
 177     if (@globalErrorIndexes) {
 178         $js_reply .= ",\n\tglobal_errors: [";
 179         my $first = 1;
 180         foreach (@globalErrorIndexes) {
 181             $js_reply .= "," unless $first;
 182             $first = 0;
 183             $js_reply .= "\n\t\t$_";
 184         }
 185         $js_reply .= "\n\t]";
 186     }
 187
 188         my $err_string = '';
 189         if (scalar @errors) {
 190                 $err_string = ",\n\talerts: ["; # open response_function
 191                 my $i = 1;
 192                 foreach (@errors) {
 193                         my $key = (keys %$_)[0];
 194                         $err_string .= "\n\t\t KOHA.Tags.tag_message.$key(\"" . $_->{$key} . '")';
 195                         if($i < scalar @errors){ $err_string .= ","; }
 196                         $i++;
 197                 }
 198                 $err_string .= "\n\t]\n";       # close response_function
 199         }
 200
 201     # Add per-biblionumber results for use on results page
 202     my $js_perbib = "";
 203     for my $bib (keys %$perBibResults) {
 204         my $bibResult = $perBibResults->{$bib};
 205         my $js_bibres = ",\n\t$bib: {\n\t\tadded: $bibResult->{adds}";
 206         $js_bibres .= ",\n\t\terrors: [";
 207         my $i = 0;
 208         foreach (@{$bibResult->{errors}}) {
 209             $js_bibres .= "," if ($i);
 210                         my $key = (keys %$_)[0];
 211                         $js_bibres .= "\n\t\t\t KOHA.Tags.tag_message.$key(\"" . $_->{$key} . '")';
 212             $i++;
 213         }
 214         $js_bibres .= "\n\t\t]\n\t}";
 215         $js_perbib .= $js_bibres;
 216     }
 217
 218         output_with_http_headers($query, undef, "$js_reply\n$err_string\n$js_perbib\n};", 'js');
 219         exit;
 220 }
 221
 222 my $results = [];
 223 my $my_tags = [];
 224
 225 if ($loggedinuser) {
 226         $my_tags = get_tag_rows({borrowernumber=>$loggedinuser});
 227         foreach (@$my_tags) {
 228                 my $biblio = GetBiblioData($_->{biblionumber});
 229                 $_->{bib_summary} = $biblio->{title};
 230                 ($biblio->{author}) and $_->{bib_summary} .= " by " . $biblio->{author};
 231                 my $date = $_->{date_created} || '';
 232                 $date =~ /\s+(\d{2}\:\d{2}\:\d{2})/;
 233                 $_->{time_created_display} = $1;
 234         }
 235 }
 236
 237 $template->param(tagsview => 1,
 238 dateformat => C4::Context->preference("dateformat"));
 239
 240 if ($add_op) {
 241         my $adds = 0;
 242         for (values %counts) {$adds += $_;}
 243         $template->param(
 244                 add_op => 1,
 245                 added_count => $adds,
 246                 deleted_count => $dels,
 247         );
 248 } else {
 249         my ($arg,$limit,$mine);
 250         my $hardmax = 100;      # you might disagree what this value should be, but there definitely should be a max
 251         $limit = $query->param('limit') || $hardmax;
 252     $mine =  $query->param('mine') || 0; # set if the patron want to see only his own tags.
 253         ($limit =~ /^\d+$/ and $limit <= $hardmax) or $limit = $hardmax;
 254         $template->param(limit => $limit);
 255         my $arghash = {approved=>1, limit=>$limit, 'sort'=>'-weight_total'};
 256     $arghash->{'borrowernumber'} = $loggedinuser if $mine;
 257         # ($openadds) or $arghash->{approved} = 1;
 258         if ($arg = $query->param('tag')) {
 259                 $arghash->{term} = $arg;
 260         } elsif ($arg = $query->param('biblionumber')) {
 261                 $arghash->{biblionumber} = $arg;
 262         }
 263         $results = get_approval_rows($arghash);
 264
 265         my $count = scalar @$results;
 266         $template->param(TAGLOOP_COUNT => $count, mine => $mine);
 267         # Here we make a halfhearted attempt to separate the tags into "strata" based on weight_total
 268         # FIXME: code4lib probably has a better algorithm, iirc
 269         # FIXME: when we get a better algorithm, move to C4
 270         my $maxstrata = 5;
 271         my $strata = 1;
 272         my $previous = 0;
 273         my $chunk = ($count/$maxstrata)/2;
 274         my $total = 0;
 275         my %cloud;
 276         foreach (reverse @$results) {
 277                 my $current = $_->{weight_total};
 278                 $total++;
 279                 $cloud{$strata}++;
 280                 if ($current == $previous) {
 281                         $_->{cloudweight} = $strata;
 282                         next;
 283                 }
 284                 if ($strata < $maxstrata and
 285                         ($cloud{$strata} > $chunk or
 286                         $count-$total <= $maxstrata-$strata)) {
 287                         $strata++;
 288                 }
 289                 $_->{cloudweight} = $strata;
 290                 $previous = $current;
 291         }
 292 }
 293 (scalar @errors  ) and $template->param(ERRORS  => \@errors);
 294 my @orderedresult = sort { uc($a->{'term'}) cmp uc($b->{'term'}) } @$results;
 295 (scalar @$results) and $template->param(TAGLOOP => \@orderedresult );
 296 (scalar @$my_tags) and $template->param(MY_TAGS => $my_tags);
 297
 298 output_html_with_http_headers $query, $cookie, $template->output;
 299 __END__
 300
 301 =head1 EXAMPLE AJAX POST PARAMETERS
 302
 303 CGISESSID       7c6288263107beb320f70f78fd767f56
 304 newtag396       fire,+<a+href="foobar.html">foobar</a>,+<img+src="foo.jpg"+/>
 305
 306 So this request is trying to add 3 tags to biblio #396.  The CGISESSID is the same as that the browser would
 307 typically communicate using cookies.  If it is valid, the server will split the value of "newtag396" and
 308 process the components for addition.  In this case the intended tags are:
 309         fire
 310         <a+href="foobar.html">foobar</a>
 311         <img src="foo.jpg" />
 312
 313 The first tag is acceptable.  The second will be scrubbed of markup, resulting in the tag "foobar".
 314 The third tag is all markup, and will be rejected.
 315
 316 =head1 EXAMPLE AJAX JSON response
 317
 318 response = {
 319         added: 2,
 320         deleted: 0,
 321         errors: 2,
 322         alerts: [
 323                  KOHA.Tags.tag_message.scrubbed("foobar"),
 324                  KOHA.Tags.tag_message.scrubbed_all_bad("1"),
 325         ],
 326 };
 327
 328 =cut
 329