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}, $pvar->{template}->output, undef, { force_no_caching => 1 };
  58
  59 #-------------------------------------------------------------------------------
  60
  61 sub _init {
  62     my ($param) = @_;
  63     my $query = new CGI;
  64     $param->{query}       = $query;
  65     $param->{shelfnumber} = $query->param('shelfnumber') || 0;
  66     $param->{op}          = $query->param('op') || '';
  67     $param->{addrlist}    = $query->param('invite_address') || '';
  68     $param->{key}         = $query->param('key') || '';
  69     $param->{appr_addr}   = [];
  70     $param->{fail_addr}   = [];
  71     $param->{errcode}     = check_common_errors($param);
  72
  73     # trim email address
  74     if ( $param->{addrlist} ) {
  75         $param->{addrlist} =~ s|^\s+||;
  76         $param->{addrlist} =~ s|\s+$||;
  77     }
  78
  79     #get some list details
  80     my $shelf;
  81     my $shelfnumber = $param->{shelfnumber};
  82     $shelf = Koha::Virtualshelves->find( $shelfnumber ) unless $param->{errcode};
  83     $param->{shelfname} = $shelf ? $shelf->shelfname : q||;
  84     $param->{owner}     = $shelf ? $shelf->owner : -1;
  85     $param->{category}  = $shelf ? $shelf->category : -1;
  86
  87     load_template($param);
  88     return $param;
  89 }
  90
  91 sub check_common_errors {
  92     my ($param) = @_;
  93     if ( $param->{op} !~ /^(invite|conf_invite|accept)$/ ) {
  94         return 1;    #no operation specified
  95     }
  96     if ( $param->{shelfnumber} !~ /^\d+$/ ) {
  97         return 2;    #invalid shelf number
  98     }
  99     if ( !C4::Context->preference('OpacAllowSharingPrivateLists') ) {
 100         return 3;    #not or no longer allowed?
 101     }
 102     return;
 103 }
 104
 105 sub show_invite {
 106     my ($param) = @_;
 107     return unless check_owner_category($param);
 108 }
 109
 110 sub confirm_invite {
 111     my ($param) = @_;
 112     return unless check_owner_category($param);
 113     process_addrlist($param);
 114     if ( @{ $param->{appr_addr} } ) {
 115         send_invitekey($param);
 116     }
 117     else {
 118         $param->{errcode} = 6;    #not one valid address
 119     }
 120 }
 121
 122 sub show_accept {
 123     my ($param) = @_;
 124
 125     my $shelfnumber = $param->{shelfnumber};
 126     my $shelf = Koha::Virtualshelves->find( $shelfnumber );
 127
 128     # The key for accepting is checked later in Koha::Virtualshelfshare
 129     # You must not be the owner and the list must be private
 130     if( !$shelf ) {
 131         $param->{errcode} = 2;
 132     } elsif( $shelf->category == 2 ) {
 133         $param->{errcode} = 5;
 134     } elsif( $shelf->owner == $param->{loggedinuser} ) {
 135         $param->{errcode} = 8;
 136     }
 137     return if $param->{errcode};
 138
 139     # Look for shelfnumber and invitekey in shares, expiration check later
 140     my $key = keytostring( stringtokey( $param->{key}, 0 ), 1 );
 141     my $shared_shelves = Koha::Virtualshelfshares->search({
 142         shelfnumber => $param->{shelfnumber},
 143         invitekey => $key,
 144     });
 145     my $shared_shelf = $shared_shelves ? $shared_shelves->next : undef; # we pick the first, but there should only be one
 146
 147     if ( $shared_shelf ) {
 148         my $is_accepted = eval { $shared_shelf->accept( $key, $param->{loggedinuser} ) };
 149         if( $is_accepted ) {
 150             notify_owner($param);
 151             #redirect to view of this shared list
 152             print $param->{query}->redirect(
 153                 -uri    => SHELVES_URL . $param->{shelfnumber},
 154                 -cookie => $param->{cookie}
 155             );
 156             exit;
 157         }
 158     }
 159     $param->{errcode} = 7; # not accepted: key invalid or expired
 160 }
 161
 162 sub notify_owner {
 163     my ($param) = @_;
 164
 165     my $patron = Koha::Patrons->find( $param->{owner} );
 166     return unless $patron;
 167
 168     my $toaddr = $patron->notice_email_address or return;
 169
 170     #prepare letter
 171     my $letter = C4::Letters::GetPreparedLetter(
 172         module      => 'members',
 173         letter_code => 'SHARE_ACCEPT',
 174         branchcode  => C4::Context->userenv->{"branch"},
 175         lang        => $patron->lang,
 176         tables      => { borrowers => $param->{loggedinuser}, },
 177         substitute  => { listname => $param->{shelfname}, },
 178     );
 179
 180     #send letter to queue
 181     C4::Letters::EnqueueLetter(
 182         {
 183             letter                 => $letter,
 184             message_transport_type => 'email',
 185             from_address => C4::Context->preference('KohaAdminEmailAddress'),
 186             to_address   => $toaddr,
 187         }
 188     );
 189 }
 190
 191 sub process_addrlist {
 192     my ($param) = @_;
 193     my @temp = split /[,:;]/, $param->{addrlist};
 194     my @appr_addr;
 195     my @fail_addr;
 196     foreach my $a (@temp) {
 197         $a =~ s/^\s+//;
 198         $a =~ s/\s+$//;
 199         if ( IsEmailAddress($a) ) {
 200             push @appr_addr, $a;
 201         }
 202         else {
 203             push @fail_addr, $a;
 204         }
 205     }
 206     $param->{appr_addr} = \@appr_addr;
 207     $param->{fail_addr} = \@fail_addr;
 208 }
 209
 210 sub send_invitekey {
 211     my ($param) = @_;
 212     my $fromaddr = C4::Context->preference('KohaAdminEmailAddress');
 213     my $url =
 214         C4::Context->preference('OPACBaseURL')
 215       . "/cgi-bin/koha/opac-shareshelf.pl?shelfnumber="
 216       . $param->{shelfnumber}
 217       . "&op=accept&key=";
 218
 219     #TODO Waiting for the right http or https solution (BZ 8952 a.o.)
 220
 221     my @ok;    #the addresses that were processed well
 222     foreach my $a ( @{ $param->{appr_addr} } ) {
 223         my @newkey = randomlist( KEYLENGTH, 64 );    #generate a new key
 224
 225         #add a preliminary share record
 226         my $shelf = Koha::Virtualshelves->find( $param->{shelfnumber} );
 227         my $key = keytostring( \@newkey, 1 );
 228         my $is_shared = eval { $shelf->share( $key ); };
 229         # TODO Better error handling, catch the exceptions
 230         if ( $@ or not $is_shared ) {
 231             push @{ $param->{fail_addr} }, $a;
 232             next;
 233         }
 234         push @ok, $a;
 235
 236         #prepare letter
 237         my $letter = C4::Letters::GetPreparedLetter(
 238             module      => 'members',
 239             letter_code => 'SHARE_INVITE',
 240             branchcode  => C4::Context->userenv->{"branch"},
 241             lang        => 'default', # Not sure how we could use something more useful else here
 242             tables      => { borrowers => $param->{loggedinuser}, },
 243             substitute  => {
 244                 listname => $param->{shelfname},
 245                 shareurl => $url . keytostring( \@newkey, 0 ),
 246             },
 247         );
 248
 249         #send letter to queue
 250         C4::Letters::EnqueueLetter(
 251             {
 252                 letter                 => $letter,
 253                 message_transport_type => 'email',
 254                 from_address           => $fromaddr,
 255                 to_address             => $a,
 256             }
 257         );
 258     }
 259     $param->{appr_addr} = \@ok;
 260 }
 261
 262 sub check_owner_category {
 263     my ($param) = @_;
 264
 265     #sharing user should be the owner
 266     #list should be private
 267     $param->{errcode} = 4 if $param->{owner} != $param->{loggedinuser};
 268     $param->{errcode} = 5 if !$param->{errcode} && $param->{category} != 1;
 269     return !defined $param->{errcode};
 270 }
 271
 272 sub load_template {
 273     my ($param) = @_;
 274     ( $param->{template}, $param->{loggedinuser}, $param->{cookie} ) =
 275       get_template_and_user(
 276         {
 277             template_name   => TEMPLATE_NAME,
 278             query           => $param->{query},
 279             type            => "opac",
 280             authnotrequired => 0,                 #should be a user
 281         }
 282       );
 283 }
 284
 285 sub load_template_vars {
 286     my ($param) = @_;
 287     my $template = $param->{template};
 288     my $appr = join '; ', @{ $param->{appr_addr} };
 289     my $fail = join '; ', @{ $param->{fail_addr} };
 290     $template->param(
 291         errcode         => $param->{errcode},
 292         op              => $param->{op},
 293         shelfnumber     => $param->{shelfnumber},
 294         shelfname       => $param->{shelfname},
 295         approvedaddress => $appr,
 296         failaddress     => $fail,
 297     );
 298 }
 299
 300 sub IsEmailAddress {
 301
 302     #TODO candidate for a module?
 303     return Email::Valid->address( $_[0] ) ? 1 : 0;
 304 }
 305
 306 sub randomlist {
 307
 308     #uses rand, safe enough for this application but not for more sensitive data
 309     my ( $length, $base ) = @_;
 310     return map { int( rand($base) ); } 1 .. $length;
 311 }
 312
 313 sub keytostring {
 314     my ( $keyref, $flgBase64 ) = @_;
 315     if ($flgBase64) {
 316         my $alphabet = [ 'A' .. 'Z', 'a' .. 'z', 0 .. 9, '+', '/' ];
 317         return join '', map { alphabet_char( $_, $alphabet ); } @$keyref;
 318     }
 319     return join '', map { sprintf( "%02d", $_ ); } @$keyref;
 320 }
 321
 322 sub stringtokey {
 323     my ( $str, $flgBase64 ) = @_;
 324     my @temp = split '', $str || '';
 325     if ($flgBase64) {
 326         my $alphabet = [ 'A' .. 'Z', 'a' .. 'z', 0 .. 9, '+', '/' ];
 327         return [ map { alphabet_ordinal( $_, $alphabet ); } @temp ];
 328     }
 329     return [] if $str !~ /^\d+$/;
 330     my @retval;
 331     for ( my $i = 0 ; $i < @temp - 1 ; $i += 2 ) {
 332         push @retval, $temp[$i] * 10 + $temp[ $i + 1 ];
 333     }
 334     return \@retval;
 335 }
 336
 337 sub alphabet_ordinal {
 338     my ( $char, $alphabet ) = @_;
 339     for my $ord ( 0 .. $#$alphabet ) {
 340         return $ord if $char eq $alphabet->[$ord];
 341     }
 342     return '';    #ignore missing chars
 343 }
 344
 345 sub alphabet_char {
 346
 347     #reverse operation for ordinal; ignore invalid numbers
 348     my ( $num, $alphabet ) = @_;
 349     return $num =~ /^\d+$/ && $num <= $#$alphabet ? $alphabet->[$num] : '';
 350 }