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