opac/opac-shareshelf.pl

   1 #!/usr/bin/perl
   2
   3 # Copyright 2013 Rijksmuseum
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use Modern::Perl;
  21
  22 use constant KEYLENGTH     => 10;
  23 use constant TEMPLATE_NAME => 'opac-shareshelf.tt';
  24 use constant SHELVES_URL =>
  25   '/cgi-bin/koha/opac-shelves.pl?display=privateshelves&viewshelf=';
  26
  27 use CGI qw ( -utf8 );
  28 use Email::Valid;
  29
  30 use C4::Auth;
  31 use C4::Context;
  32 use C4::Letters;
  33 use C4::Members ();
  34 use C4::Output;
  35
  36 use Koha::Patrons;
  37 use Koha::Virtualshelves;
  38 use Koha::Virtualshelfshares;
  39
  40
  41 # if virtualshelves is disabled, leave immediately
  42 if ( ! C4::Context->preference('virtualshelves') ) {
  43     my $query = new CGI;
  44     print $query->redirect("/cgi-bin/koha/errors/404.pl");
  45     exit;
  46 }
  47
  48 #-------------------------------------------------------------------------------
  49
  50 my $pvar = _init( {} );
  51 if ( !$pvar->{errcode} ) {
  52     show_invite($pvar)    if $pvar->{op} eq 'invite';
  53     confirm_invite($pvar) if $pvar->{op} eq 'conf_invite';
  54     show_accept($pvar)    if $pvar->{op} eq 'accept';
  55 }
  56 load_template_vars($pvar);
  57 output_html_with_http_headers $pvar->{query}, $pvar->{cookie},
  58   $pvar->{template}->output;
  59
  60 #-------------------------------------------------------------------------------
  61
  62 sub _init {
  63     my ($param) = @_;
  64     my $query = new CGI;
  65     $param->{query}       = $query;
  66     $param->{shelfnumber} = $query->param('shelfnumber') || 0;
  67     $param->{op}          = $query->param('op') || '';
  68     $param->{addrlist}    = $query->param('invite_address') || '';
  69     $param->{key}         = $query->param('key') || '';
  70     $param->{appr_addr}   = [];
  71     $param->{fail_addr}   = [];
  72     $param->{errcode}     = check_common_errors($param);
  73
  74     # trim email address
  75     if ( $param->{addrlist} ) {
  76         $param->{addrlist} =~ s|^\s+||;
  77         $param->{addrlist} =~ s|\s+$||;
  78     }
  79
  80     #get some list details
  81     my $shelf;
  82     my $shelfnumber = $param->{shelfnumber};
  83     $shelf = Koha::Virtualshelves->find( $shelfnumber ) unless $param->{errcode};
  84     $param->{shelfname} = $shelf ? $shelf->shelfname : q||;
  85     $param->{owner}     = $shelf ? $shelf->owner : -1;
  86     $param->{category}  = $shelf ? $shelf->category : -1;
  87
  88     load_template($param);
  89     return $param;
  90 }
  91
  92 sub check_common_errors {
  93     my ($param) = @_;
  94     if ( $param->{op} !~ /^(invite|conf_invite|accept)$/ ) {
  95         return 1;    #no operation specified
  96     }
  97     if ( $param->{shelfnumber} !~ /^\d+$/ ) {
  98         return 2;    #invalid shelf number
  99     }
 100     if ( !C4::Context->preference('OpacAllowSharingPrivateLists') ) {
 101         return 3;    #not or no longer allowed?
 102     }
 103     return;
 104 }
 105
 106 sub show_invite {
 107     my ($param) = @_;
 108     return unless check_owner_category($param);
 109 }
 110
 111 sub confirm_invite {
 112     my ($param) = @_;
 113     return unless check_owner_category($param);
 114     process_addrlist($param);
 115     if ( @{ $param->{appr_addr} } ) {
 116         send_invitekey($param);
 117     }
 118     else {
 119         $param->{errcode} = 6;    #not one valid address
 120     }
 121 }
 122
 123 sub show_accept {
 124     my ($param) = @_;
 125
 126     my $shelfnumber = $param->{shelfnumber};
 127     my $shelf = Koha::Virtualshelves->find( $shelfnumber );
 128
 129     # The key for accepting is checked later in Koha::Virtualshelf->share
 130     # You must not be the owner and the list must be private
 131     if ( $shelf->category == 2 or $shelf->owner == $param->{loggedinuser} ) {
 132         return;
 133     }
 134
 135     # We could have used ->find with the share id, but we don't want to change
 136     # the url sent to the patron
 137     my $shared_shelf = Koha::Virtualshelfshares->search(
 138         {
 139             shelfnumber => $param->{shelfnumber},
 140         },
 141         {
 142             order_by => { -desc => 'sharedate' },
 143             limit => 1,
 144         }
 145     );
 146
 147     if ( $shared_shelf ) {
 148         $shared_shelf = $shared_shelf->next;
 149         my $key = keytostring( stringtokey( $param->{key}, 0 ), 1 );
 150         my $is_accepted = eval { $shared_shelf->accept( $key, $param->{loggedinuser} ) };
 151         if ( $is_accepted ) {
 152             notify_owner($param);
 153
 154             #redirect to view of this shared list
 155             print $param->{query}->redirect(
 156                 -uri    => SHELVES_URL . $param->{shelfnumber},
 157                 -cookie => $param->{cookie}
 158             );
 159             exit;
 160         }
 161         $param->{errcode} = 7;    #not accepted (key not found or expired)
 162     } else {
 163         # This shelf is not shared
 164     }
 165 }
 166
 167 sub notify_owner {
 168     my ($param) = @_;
 169
 170     my $patron = Koha::Patrons->find( $param->{owner} );
 171     return unless $patron;
 172
 173     my $toaddr = $patron->notice_email_address or return;
 174
 175     #prepare letter
 176     my $letter = C4::Letters::GetPreparedLetter(
 177         module      => 'members',
 178         letter_code => 'SHARE_ACCEPT',
 179         branchcode  => C4::Context->userenv->{"branch"},
 180         lang        => $patron->lang,
 181         tables      => { borrowers => $param->{loggedinuser}, },
 182         substitute  => { listname => $param->{shelfname}, },
 183     );
 184
 185     #send letter to queue
 186     C4::Letters::EnqueueLetter(
 187         {
 188             letter                 => $letter,
 189             message_transport_type => 'email',
 190             from_address => C4::Context->preference('KohaAdminEmailAddress'),
 191             to_address   => $toaddr,
 192         }
 193     );
 194 }
 195
 196 sub process_addrlist {
 197     my ($param) = @_;
 198     my @temp = split /[,:;]/, $param->{addrlist};
 199     my @appr_addr;
 200     my @fail_addr;
 201     foreach my $a (@temp) {
 202         $a =~ s/^\s+//;
 203         $a =~ s/\s+$//;
 204         if ( IsEmailAddress($a) ) {
 205             push @appr_addr, $a;
 206         }
 207         else {
 208             push @fail_addr, $a;
 209         }
 210     }
 211     $param->{appr_addr} = \@appr_addr;
 212     $param->{fail_addr} = \@fail_addr;
 213 }
 214
 215 sub send_invitekey {
 216     my ($param) = @_;
 217     my $fromaddr = C4::Context->preference('KohaAdminEmailAddress');
 218     my $url =
 219         C4::Context->preference('OPACBaseURL')
 220       . "/cgi-bin/koha/opac-shareshelf.pl?shelfnumber="
 221       . $param->{shelfnumber}
 222       . "&op=accept&key=";
 223
 224     #TODO Waiting for the right http or https solution (BZ 8952 a.o.)
 225
 226     my @ok;    #the addresses that were processed well
 227     foreach my $a ( @{ $param->{appr_addr} } ) {
 228         my @newkey = randomlist( KEYLENGTH, 64 );    #generate a new key
 229
 230         #add a preliminary share record
 231         my $shelf = Koha::Virtualshelves->find( $param->{shelfnumber} );
 232         my $key = keytostring( \@newkey, 1 );
 233         my $is_shared = eval { $shelf->share( $key ); };
 234         # TODO Better error handling, catch the exceptions
 235         if ( $@ or not $is_shared ) {
 236             push @{ $param->{fail_addr} }, $a;
 237             next;
 238         }
 239         push @ok, $a;
 240
 241         #prepare letter
 242         my $letter = C4::Letters::GetPreparedLetter(
 243             module      => 'members',
 244             letter_code => 'SHARE_INVITE',
 245             branchcode  => C4::Context->userenv->{"branch"},
 246             lang        => 'default', # Not sure how we could use something more useful else here
 247             tables      => { borrowers => $param->{loggedinuser}, },
 248             substitute  => {
 249                 listname => $param->{shelfname},
 250                 shareurl => $url . keytostring( \@newkey, 0 ),
 251             },
 252         );
 253
 254         #send letter to queue
 255         C4::Letters::EnqueueLetter(
 256             {
 257                 letter                 => $letter,
 258                 message_transport_type => 'email',
 259                 from_address           => $fromaddr,
 260                 to_address             => $a,
 261             }
 262         );
 263     }
 264     $param->{appr_addr} = \@ok;
 265 }
 266
 267 sub check_owner_category {
 268     my ($param) = @_;
 269
 270     #sharing user should be the owner
 271     #list should be private
 272     $param->{errcode} = 4 if $param->{owner} != $param->{loggedinuser};
 273     $param->{errcode} = 5 if !$param->{errcode} && $param->{category} != 1;
 274     return !defined $param->{errcode};
 275 }
 276
 277 sub load_template {
 278     my ($param) = @_;
 279     ( $param->{template}, $param->{loggedinuser}, $param->{cookie} ) =
 280       get_template_and_user(
 281         {
 282             template_name   => TEMPLATE_NAME,
 283             query           => $param->{query},
 284             type            => "opac",
 285             authnotrequired => 0,                 #should be a user
 286         }
 287       );
 288 }
 289
 290 sub load_template_vars {
 291     my ($param) = @_;
 292     my $template = $param->{template};
 293     my $appr = join '; ', @{ $param->{appr_addr} };
 294     my $fail = join '; ', @{ $param->{fail_addr} };
 295     $template->param(
 296         errcode         => $param->{errcode},
 297         op              => $param->{op},
 298         shelfnumber     => $param->{shelfnumber},
 299         shelfname       => $param->{shelfname},
 300         approvedaddress => $appr,
 301         failaddress     => $fail,
 302     );
 303 }
 304
 305 sub IsEmailAddress {
 306
 307     #TODO candidate for a module?
 308     return Email::Valid->address( $_[0] ) ? 1 : 0;
 309 }
 310
 311 sub randomlist {
 312
 313     #uses rand, safe enough for this application but not for more sensitive data
 314     my ( $length, $base ) = @_;
 315     return map { int( rand($base) ); } 1 .. $length;
 316 }
 317
 318 sub keytostring {
 319     my ( $keyref, $flgBase64 ) = @_;
 320     if ($flgBase64) {
 321         my $alphabet = [ 'A' .. 'Z', 'a' .. 'z', 0 .. 9, '+', '/' ];
 322         return join '', map { alphabet_char( $_, $alphabet ); } @$keyref;
 323     }
 324     return join '', map { sprintf( "%02d", $_ ); } @$keyref;
 325 }
 326
 327 sub stringtokey {
 328     my ( $str, $flgBase64 ) = @_;
 329     my @temp = split '', $str || '';
 330     if ($flgBase64) {
 331         my $alphabet = [ 'A' .. 'Z', 'a' .. 'z', 0 .. 9, '+', '/' ];
 332         return [ map { alphabet_ordinal( $_, $alphabet ); } @temp ];
 333     }
 334     return [] if $str !~ /^\d+$/;
 335     my @retval;
 336     for ( my $i = 0 ; $i < @temp - 1 ; $i += 2 ) {
 337         push @retval, $temp[$i] * 10 + $temp[ $i + 1 ];
 338     }
 339     return \@retval;
 340 }
 341
 342 sub alphabet_ordinal {
 343     my ( $char, $alphabet ) = @_;
 344     for my $ord ( 0 .. $#$alphabet ) {
 345         return $ord if $char eq $alphabet->[$ord];
 346     }
 347     return '';    #ignore missing chars
 348 }
 349
 350 sub alphabet_char {
 351
 352     #reverse operation for ordinal; ignore invalid numbers
 353     my ( $num, $alphabet ) = @_;
 354     return $num =~ /^\d+$/ && $num <= $#$alphabet ? $alphabet->[$num] : '';
 355 }