C4/Output.pm

   1 package C4::Output;
   2
   3 #package to deal with marking up output
   4 #You will need to edit parts of this pm
   5 #set the value of path to be where your html lives
   6
   7 # Copyright 2000-2002 Katipo Communications
   8 #
   9 # This file is part of Koha.
  10 #
  11 # Koha is free software; you can redistribute it and/or modify it
  12 # under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 3 of the License, or
  14 # (at your option) any later version.
  15 #
  16 # Koha is distributed in the hope that it will be useful, but
  17 # WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  23
  24
  25 # NOTE: I'm pretty sure this module is deprecated in favor of
  26 # templates.
  27
  28 use strict;
  29 #use warnings; FIXME - Bug 2505
  30
  31 use URI::Escape;
  32
  33 use C4::Context;
  34 use C4::Templates;
  35
  36 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
  37
  38 BEGIN {
  39     # set the version for version checking
  40     $VERSION = 3.07.00.049;
  41     require Exporter;
  42
  43  @ISA    = qw(Exporter);
  44     @EXPORT_OK = qw(&is_ajax ajax_fail); # More stuff should go here instead
  45     %EXPORT_TAGS = ( all =>[qw(setlanguagecookie pagination_bar parametrized_url
  46                                 &output_with_http_headers &output_ajax_with_http_headers &output_html_with_http_headers)],
  47                     ajax =>[qw(&output_with_http_headers &output_ajax_with_http_headers is_ajax)],
  48                     html =>[qw(&output_with_http_headers &output_html_with_http_headers)]
  49                 );
  50     push @EXPORT, qw(
  51         setlanguagecookie getlanguagecookie pagination_bar parametrized_url
  52     );
  53     push @EXPORT, qw(
  54         &output_html_with_http_headers &output_ajax_with_http_headers &output_with_http_headers
  55     );
  56
  57 }
  58
  59 =head1 NAME
  60
  61 C4::Output - Functions for managing output, is slowly being deprecated
  62
  63 =head1 FUNCTIONS
  64
  65 =over 2
  66 =cut
  67
  68 =item pagination_bar
  69
  70    pagination_bar($base_url, $nb_pages, $current_page, $startfrom_name)
  71
  72 Build an HTML pagination bar based on the number of page to display, the
  73 current page and the url to give to each page link.
  74
  75 C<$base_url> is the URL for each page link. The
  76 C<$startfrom_name>=page_number is added at the end of the each URL.
  77
  78 C<$nb_pages> is the total number of pages available.
  79
  80 C<$current_page> is the current page number. This page number won't become a
  81 link.
  82
  83 This function returns HTML, without any language dependency.
  84
  85 =cut
  86
  87 sub pagination_bar {
  88     my $base_url = (@_ ? shift : return);
  89     my $nb_pages       = (@_) ? shift : 1;
  90     my $current_page   = (@_) ? shift : undef;  # delay default until later
  91     my $startfrom_name = (@_) ? shift : 'page';
  92
  93     # how many pages to show before and after the current page?
  94     my $pages_around = 2;
  95
  96         my $delim = qr/\&(?:amp;)?|;/;          # "non memory" cluster: no backreference
  97         $base_url =~ s/$delim*\b$startfrom_name=(\d+)//g; # remove previous pagination var
  98     unless (defined $current_page and $current_page > 0 and $current_page <= $nb_pages) {
  99         $current_page = ($1) ? $1 : 1;  # pull current page from param in URL, else default to 1
 100                 # $debug and    # FIXME: use C4::Debug;
 101                 # warn "with QUERY_STRING:" .$ENV{QUERY_STRING}. "\ncurrent_page:$current_page\n1:$1  2:$2  3:$3";
 102     }
 103         $base_url =~ s/($delim)+/$1/g;  # compress duplicate delims
 104         $base_url =~ s/$delim;//g;              # remove empties
 105         $base_url =~ s/$delim$//;               # remove trailing delim
 106
 107     my $url = $base_url . (($base_url =~ m/$delim/ or $base_url =~ m/\?/) ? '&amp;' : '?' ) . $startfrom_name . '=';
 108     my $pagination_bar = '';
 109
 110     # navigation bar useful only if more than one page to display !
 111     if ( $nb_pages > 1 ) {
 112
 113         # link to first page?
 114         if ( $current_page > 1 ) {
 115             $pagination_bar .=
 116                 "\n" . '&nbsp;'
 117               . '<a href="'
 118               . $url
 119               . '1" rel="start">'
 120               . '&lt;&lt;' . '</a>';
 121         }
 122         else {
 123             $pagination_bar .=
 124               "\n" . '&nbsp;<span class="inactive">&lt;&lt;</span>';
 125         }
 126
 127         # link on previous page ?
 128         if ( $current_page > 1 ) {
 129             my $previous = $current_page - 1;
 130
 131             $pagination_bar .=
 132                 "\n" . '&nbsp;'
 133               . '<a href="'
 134               . $url
 135               . $previous
 136               . '" rel="prev">' . '&lt;' . '</a>';
 137         }
 138         else {
 139             $pagination_bar .=
 140               "\n" . '&nbsp;<span class="inactive">&lt;</span>';
 141         }
 142
 143         my $min_to_display      = $current_page - $pages_around;
 144         my $max_to_display      = $current_page + $pages_around;
 145         my $last_displayed_page = undef;
 146
 147         for my $page_number ( 1 .. $nb_pages ) {
 148             if (
 149                    $page_number == 1
 150                 or $page_number == $nb_pages
 151                 or (    $page_number >= $min_to_display
 152                     and $page_number <= $max_to_display )
 153               )
 154             {
 155                 if ( defined $last_displayed_page
 156                     and $last_displayed_page != $page_number - 1 )
 157                 {
 158                     $pagination_bar .=
 159                       "\n" . '&nbsp;<span class="inactive">...</span>';
 160                 }
 161
 162                 if ( $page_number == $current_page ) {
 163                     $pagination_bar .=
 164                         "\n" . '&nbsp;'
 165                       . '<span class="currentPage">'
 166                       . $page_number
 167                       . '</span>';
 168                 }
 169                 else {
 170                     $pagination_bar .=
 171                         "\n" . '&nbsp;'
 172                       . '<a href="'
 173                       . $url
 174                       . $page_number . '">'
 175                       . $page_number . '</a>';
 176                 }
 177                 $last_displayed_page = $page_number;
 178             }
 179         }
 180
 181         # link on next page?
 182         if ( $current_page < $nb_pages ) {
 183             my $next = $current_page + 1;
 184
 185             $pagination_bar .= "\n"
 186               . '&nbsp;<a href="'
 187               . $url
 188               . $next
 189               . '" rel="next">' . '&gt;' . '</a>';
 190         }
 191         else {
 192             $pagination_bar .=
 193               "\n" . '&nbsp;<span class="inactive">&gt;</span>';
 194         }
 195
 196         # link to last page?
 197         if ( $current_page != $nb_pages ) {
 198             $pagination_bar .= "\n"
 199               . '&nbsp;<a href="'
 200               . $url
 201               . $nb_pages
 202               . '" rel="last">'
 203               . '&gt;&gt;' . '</a>';
 204         }
 205         else {
 206             $pagination_bar .=
 207               "\n" . '&nbsp;<span class="inactive">&gt;&gt;</span>';
 208         }
 209     }
 210
 211     return $pagination_bar;
 212 }
 213
 214 =item output_with_http_headers
 215
 216    &output_with_http_headers($query, $cookie, $data, $content_type[, $status[, $extra_options]])
 217
 218 Outputs $data with the appropriate HTTP headers,
 219 the authentication cookie $cookie and a Content-Type specified in
 220 $content_type.
 221
 222 If applicable, $cookie can be undef, and it will not be sent.
 223
 224 $content_type is one of the following: 'html', 'js', 'json', 'xml', 'rss', or 'atom'.
 225
 226 $status is an HTTP status message, like '403 Authentication Required'. It defaults to '200 OK'.
 227
 228 $extra_options is hashref.  If the key 'force_no_caching' is present and has
 229 a true value, the HTTP headers include directives to force there to be no
 230 caching whatsoever.
 231
 232 =cut
 233
 234 sub output_with_http_headers {
 235     my ( $query, $cookie, $data, $content_type, $status, $extra_options ) = @_;
 236     $status ||= '200 OK';
 237
 238     $extra_options //= {};
 239
 240     my %content_type_map = (
 241         'html' => 'text/html',
 242         'js'   => 'text/javascript',
 243         'json' => 'application/json',
 244         'xml'  => 'text/xml',
 245         # NOTE: not using application/atom+xml or application/rss+xml because of
 246         # Internet Explorer 6; see bug 2078.
 247         'rss'  => 'text/xml',
 248         'atom' => 'text/xml'
 249     );
 250
 251     die "Unknown content type '$content_type'" if ( !defined( $content_type_map{$content_type} ) );
 252     my $cache_policy = 'no-cache';
 253     $cache_policy .= ', no-store, max-age=0' if $extra_options->{force_no_caching};
 254     my $options = {
 255         type    => $content_type_map{$content_type},
 256         status  => $status,
 257         charset => 'UTF-8',
 258         Pragma          => 'no-cache',
 259         'Cache-Control' => $cache_policy,
 260     };
 261     $options->{expires} = 'now' if $extra_options->{force_no_caching};
 262
 263     $options->{cookie} = $cookie if $cookie;
 264     if ($content_type eq 'html') {  # guaranteed to be one of the content_type_map keys, else we'd have died
 265         $options->{'Content-Style-Type' } = 'text/css';
 266         $options->{'Content-Script-Type'} = 'text/javascript';
 267     }
 268
 269 # We can't encode here, that will double encode our templates, and xslt
 270 # We need to fix the encoding as it comes out of the database, or when we pass the variables to templates
 271
 272     $data =~ s/\&amp\;amp\; /\&amp\; /g;
 273     print $query->header($options), $data;
 274 }
 275
 276 sub output_html_with_http_headers {
 277     my ( $query, $cookie, $data, $status, $extra_options ) = @_;
 278     output_with_http_headers( $query, $cookie, $data, 'html', $status, $extra_options );
 279 }
 280
 281
 282 sub output_ajax_with_http_headers {
 283     my ( $query, $js ) = @_;
 284     print $query->header(
 285         -type            => 'text/javascript',
 286         -charset         => 'UTF-8',
 287         -Pragma          => 'no-cache',
 288         -'Cache-Control' => 'no-cache',
 289         -expires         => '-1d',
 290     ), $js;
 291 }
 292
 293 sub is_ajax {
 294     my $x_req = $ENV{HTTP_X_REQUESTED_WITH};
 295     return ( $x_req and $x_req =~ /XMLHttpRequest/i ) ? 1 : 0;
 296 }
 297
 298 sub parametrized_url {
 299     my $url = shift || ''; # ie page.pl?ln={LANG}
 300     my $vars = shift || {}; # ie { LANG => en }
 301     my $ret = $url;
 302     while ( my ($key,$val) = each %$vars) {
 303         my $val_url = URI::Escape::uri_escape_utf8($val);
 304         $ret =~ s/\{$key\}/$val_url/g;
 305     }
 306     $ret =~ s/\{[^\{]*\}//g; # remove not defined vars
 307     return $ret;
 308 }
 309
 310 END { }    # module clean-up code here (global destructor)
 311
 312 1;
 313 __END__
 314
 315 =back
 316
 317 =head1 AUTHOR
 318
 319 Koha Development Team <http://koha-community.org/>
 320
 321 =cut