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 with
  17 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  18 # Suite 330, Boston, MA  02111-1307 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
  48 sub ajax_auth_cgi ($) {     # returns CGI object
  49     my $needed_flags = shift;
  50         my %cookies = fetch CGI::Cookie;
  51         my $input = CGI->new;
  52         my $sessid = $cookies{'CGISESSID'}->value || $input->param('CGISESSID');
  53         my ($auth_status, $auth_sessid) = check_cookie_auth($sessid, $needed_flags);
  54         $debug and
  55         print STDERR "($auth_status, $auth_sessid) = check_cookie_auth($sessid," . Dumper($needed_flags) . ")\n";
  56         if ($auth_status ne "ok") {
  57                 output_ajax_with_http_headers $input,
  58                 "window.alert('Your CGI session cookie ($sessid) is not current.  " .
  59                 "Please refresh the page and try again.');\n";
  60                 exit 0;
  61         }
  62         $debug and print STDERR "AJAX request: " . Dumper($input),
  63                 "\n(\$auth_status,\$auth_sessid) = ($auth_status,$auth_sessid)\n";
  64         return $input;
  65 }
  66
  67 # The trick here is to support multiple tags added to multiple bilbios in one POST.
  68 # The HTML might not use this, but it makes it more web-servicey from the start.
  69 # So the name of param has to have biblionumber built in.
  70 # For lack of anything more compelling, we just use "newtag[biblionumber]"
  71 # We split the value into tags at comma and semicolon
  72
  73 my $is_ajax = is_ajax();
  74 my $openadds = C4::Context->preference('TagsModeration') ? 0 : 1;
  75 my $query = ($is_ajax) ? &ajax_auth_cgi({}) : CGI->new();
  76 unless (C4::Context->preference('TagsEnabled')) {
  77         push @errors, {+ tagsdisabled=>1 };
  78 } else {
  79         foreach ($query->param) {
  80                 if (/^newtag(.*)/) {
  81                         my $biblionumber = $1;
  82                         unless ($biblionumber =~ /^\d+$/) {
  83                                 $debug and warn "$_ references non numerical biblionumber '$biblionumber'";
  84                                 push @errors, {+'badparam' => $_ };
  85                                 next;
  86                         }
  87                         $newtags{$biblionumber} = $query->param($_);
  88                 } elsif (/^del(\d+)$/) {
  89                         push @deltags, $1;
  90                 }
  91         }
  92 }
  93
  94 my $add_op = (scalar(keys %newtags) + scalar(@deltags)) ? 1 : 0;
  95 my ($template, $loggedinuser, $cookie);
  96 if ($is_ajax) {
  97         $loggedinuser = C4::Context->userenv->{'number'};  # must occur AFTER auth
  98         $debug and print STDERR "op: $loggedinuser\n";
  99 } else {
 100         ($template, $loggedinuser, $cookie) = get_template_and_user({
 101                 template_name   => "opac-tags.tmpl",
 102                 query           => $query,
 103                 type            => "opac",
 104                 authnotrequired => ($add_op ? 0 : 1),   # auth required to add tags
 105                 debug           => 1,
 106         });
 107 }
 108
 109 if ($add_op) {
 110         unless ($loggedinuser) {
 111                 push @errors, {+'login' => 1 };
 112                 %newtags=();    # zero out any attempted additions
 113                 @deltags=();    # zero out any attempted deletions
 114         }
 115 }
 116
 117 my $scrubber;
 118 my @newtags_keys = (keys %newtags);
 119 if (scalar @newtags_keys) {
 120         $scrubber = C4::Scrubber->new();
 121         foreach my $biblionumber (@newtags_keys) {
 122                 my @values = split /[;,]/, $newtags{$biblionumber};
 123                 foreach (@values) {
 124                         s/^\s*(.+)\s*$/$1/;
 125                         my $clean_tag = $scrubber->scrub($_);
 126                         unless ($clean_tag eq $_) {
 127                                 if ($clean_tag =~ /\S/) {
 128                                         push @errors, {scrubbed=>$clean_tag};
 129                                 } else {
 130                                         push @errors, {scrubbed_all_bad=>1};
 131                                         next;   # we don't add it if there's nothing left!
 132                                 }
 133                         }
 134                         my $result = ($openadds) ?
 135                                 add_tag($biblionumber,$clean_tag,$loggedinuser,0) : # pre-approved
 136                                 add_tag($biblionumber,$clean_tag,$loggedinuser)   ;
 137                         if ($result) {
 138                                 $counts{$biblionumber}++;
 139                         } else {
 140                                 push @errors, {failed_add_tag=>$clean_tag};
 141                                 warn "add_tag($biblionumber,$clean_tag,$loggedinuser...) returned bad result ($result)";
 142                         }
 143                 }
 144         }
 145 }
 146 my $dels = 0;
 147 foreach (@deltags) {
 148         if (remove_tag($_,$loggedinuser)) {
 149                 $dels++;
 150         } else {
 151                 push @errors, {failed_delete=>$_};
 152         }
 153 }
 154
 155 if ($is_ajax) {
 156         my $sum = 0;
 157         foreach (values %counts) {$sum += $_;}
 158         my $js_reply = sprintf("response = {\n\tadded: %d,\n\tdeleted: %d,\n\terrors: %d,",$sum,$dels,scalar @errors);
 159         my $err_string = '';
 160         if (scalar @errors) {
 161                 $err_string = "\n\talerts: [";  # open response_function
 162                 foreach (@errors) {
 163                         my $key = (keys %$_)[0];
 164                         $err_string .= "\n\t\t KOHA.Tags.tag_message.$key(\"" . $_->{$key} . '"),';
 165                 }
 166                 $err_string .= "\n\t],\n";      # close response_function
 167         }
 168         output_ajax_with_http_headers($query, "$js_reply\n$err_string};");
 169         exit;
 170 }
 171
 172 my $results = [];
 173 my $my_tags = [];
 174
 175 if ($loggedinuser and not $query->param('hidemytags')) {
 176         $my_tags = get_tag_rows({borrowernumber=>$loggedinuser});
 177         foreach (@$my_tags) {
 178                 my $biblio = GetBiblioData($_->{biblionumber});
 179                 $_->{bib_summary} = $biblio->{title};
 180                 ($biblio->{author}) and $_->{bib_summary} .= " by " . $biblio->{author};
 181                 my $date = $_->{date_created} || '';
 182                 $date =~ /\s+(\d{2}\:\d{2}\:\d{2})/;
 183                 $_->{time_created_display} = $1;
 184                 $_->{date_created_display} = format_date($_->{date_created});
 185         }
 186 }
 187 $template->param(tagsview => 1,);
 188 if ($add_op) {
 189         my $adds = 0;
 190         for (values %counts) {$adds += $_;}
 191         $template->param(
 192                 add_op => 1,
 193                 added_count => $adds,
 194                 deleted_count => $dels,
 195         );
 196 } else {
 197         my ($arg,$limit);
 198         my $hardmax = 100;      # you might disagree what this value should be, but there definitely should be a max
 199         $limit = $query->param('limit') || $hardmax;
 200         ($limit =~ /^\d+$/ and $limit <= $hardmax) or $limit = $hardmax;
 201         $template->param(limit => $limit);
 202         if ($arg = $query->param('tag')) {
 203                 $results = get_approval_rows({term => $arg, approved=>1, limit=>$limit, 'sort'=>'-weight_total'});
 204         } elsif ($arg = $query->param('biblionumber')) {
 205                 $results = get_approval_rows({biblionumber => $arg, approved=>1, limit=>$limit, 'sort'=>'-weight_total'});
 206         } else {
 207                 $results = get_approval_rows({limit=>$limit, approved=>1, 'sort'=>'-weight_total'});
 208         }
 209
 210         my $count = scalar @$results;
 211         $template->param(TAGLOOP_COUNT => $count);
 212         # Here we make a halfhearted attempt to separate the tags into "strata" based on weight_total
 213         # FIXME: code4lib probably has a better algorithm, iirc
 214         # FIXME: when we get a better algorithm, move to C4
 215         my $maxstrata = 5;
 216         my $strata = 1;
 217         my $previous = 0;
 218         my $chunk = ($count/$maxstrata)/2;
 219         my $total = 0;
 220         my %cloud;
 221         foreach (reverse @$results) {
 222                 my $current = $_->{weight_total};
 223                 $total++;
 224                 $cloud{$strata}++;
 225                 if ($current == $previous) {
 226                         $_->{cloudweight} = $strata;
 227                         next;
 228                 }
 229                 if ($strata < $maxstrata and
 230                         ($cloud{$strata} > $chunk or
 231                         $count-$total <= $maxstrata-$strata)) {
 232                         $strata++;
 233                 }
 234                 $_->{cloudweight} = $strata;
 235                 $previous = $current;
 236         }
 237 }
 238 $query->param('hidemytags') and $template->param(hidemytags => 1);
 239 (scalar @errors  ) and $template->param(ERRORS  => \@errors);
 240 (scalar @$results) and $template->param(TAGLOOP => $results);
 241 (scalar @$my_tags) and $template->param(MY_TAGS => $my_tags);
 242
 243 output_html_with_http_headers $query, $cookie, $template->output;
 244 __END__
 245
 246 =head1 EXAMPLE AJAX POST PARAMETERS
 247
 248 CGISESSID       7c6288263107beb320f70f78fd767f56
 249 newtag396       fire,+<a+href="foobar.html">foobar</a>,+<img+src="foo.jpg"+/>
 250
 251 So this request is trying to add 3 tags to biblio #396.  The CGISESSID is the same as that the browser would
 252 typically communicate using cookies.  If it is valid, the server will split the value of "newtag396" and
 253 process the components for addition.  In this case the intended tags are:
 254         fire
 255         <a+href="foobar.html">foobar</a>
 256         <img src="foo.jpg" />
 257
 258 The first tag is acceptable.  The second will be scrubbed of markup, resulting in the tag "foobar".
 259 The third tag is all markup, and will be rejected.
 260
 261 =head1 EXAMPLE AJAX JSON response
 262
 263 response = {
 264         added: 2,
 265         deleted: 0,
 266         errors: 2,
 267         alerts: [
 268                  KOHA.Tags.tag_message.scrubbed("foobar"),
 269                  KOHA.Tags.tag_message.scrubbed_all_bad("1"),
 270         ],
 271 };
 272
 273 =cut
 274