C4/Templates.pm

   1 package C4::Templates;
   2
   3 use strict;
   4 use warnings;
   5 use Carp;
   6 use CGI qw ( -utf8 );
   7 use List::MoreUtils qw/ any uniq /;
   8
   9 # Copyright 2009 Chris Cormack and The Koha Dev Team
  10 #
  11 # This file is part of Koha.
  12 #
  13 # Koha is free software; you can redistribute it and/or modify it under the
  14 # terms of the GNU General Public License as published by the Free Software
  15 # Foundation; either version 2 of the License, or (at your option) any later
  16 # version.
  17 #
  18 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  19 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  20 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  21 #
  22 # You should have received a copy of the GNU General Public License along with
  23 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  24 # Suite 330, Boston, MA  02111-1307 USA
  25
  26 =head1 NAME
  27
  28     Koha::Templates - Object for manipulating templates for use with Koha
  29
  30 =cut
  31
  32 use base qw(Class::Accessor);
  33 use Template;
  34 use Template::Constants qw( :debug );
  35 use C4::Languages qw(getTranslatedLanguages get_bidi regex_lang_subtags language_get_description accept_language );
  36
  37 use C4::Context;
  38
  39 __PACKAGE__->mk_accessors(qw( theme activethemes preferredtheme lang filename htdocs interface vars));
  40
  41
  42
  43 sub new {
  44     my $class     = shift;
  45     my $interface = shift;
  46     my $filename  = shift;
  47     my $tmplbase  = shift;
  48     my $query     = @_? shift: undef;
  49     my $htdocs;
  50     if ( $interface ne "intranet" ) {
  51         $htdocs = C4::Context->config('opachtdocs');
  52     }
  53     else {
  54         $htdocs = C4::Context->config('intrahtdocs');
  55     }
  56     my ($theme, $lang, $activethemes)= themelanguage( $htdocs, $tmplbase, $interface, $query);
  57     my @includes;
  58     foreach (@$activethemes) {
  59         push @includes, "$htdocs/$_/$lang/includes";
  60         push @includes, "$htdocs/$_/en/includes" unless $lang eq 'en';
  61     }
  62     # Do not use template cache if script is called from commandline
  63     my $use_template_cache = C4::Context->config('template_cache_dir') && defined $ENV{GATEWAY_INTERFACE};
  64     my $template = Template->new(
  65         {   EVAL_PERL    => 1,
  66             ABSOLUTE     => 1,
  67             PLUGIN_BASE => 'Koha::Template::Plugin',
  68             COMPILE_EXT => $use_template_cache ? '.ttc' : '',
  69             COMPILE_DIR => $use_template_cache ? C4::Context->config('template_cache_dir') : '',
  70             INCLUDE_PATH => \@includes,
  71             FILTERS => {},
  72             ENCODING => 'UTF-8',
  73         }
  74     ) or die Template->error();
  75     my $self = {
  76         TEMPLATE => $template,
  77         VARS     => {},
  78     };
  79     bless $self, $class;
  80     $self->theme($theme);
  81     $self->lang($lang);
  82     $self->activethemes($activethemes);
  83     $self->preferredtheme($activethemes->[0]);
  84     $self->filename($filename);
  85     $self->htdocs($htdocs);
  86     $self->interface($interface);
  87     $self->{VARS}->{"test"} = "value";
  88     return $self;
  89
  90 }
  91
  92 sub output {
  93     my $self = shift;
  94     my $vars = shift;
  95
  96 #    my $file = $self->htdocs . '/' . $self->theme .'/'.$self->lang.'/'.$self->filename;
  97     my $template = $self->{TEMPLATE};
  98     if ( $self->interface eq 'intranet' ) {
  99         $vars->{themelang} = '/intranet-tmpl';
 100     }
 101     else {
 102         $vars->{themelang} = '/opac-tmpl';
 103     }
 104     $vars->{lang} = $self->lang;
 105     $vars->{themelang} .= '/' . $self->preferredtheme . '/' . $self->lang;
 106     $vars->{interface} =
 107       ( $self->{interface} ne 'intranet' ? '/opac-tmpl' : '/intranet-tmpl' );
 108     $vars->{theme} = $self->theme;
 109     $vars->{OpacAdditionalStylesheet} =
 110         C4::Context->preference('OpacAdditionalStylesheet');
 111     $vars->{opaclayoutstylesheet} =
 112         C4::Context->preference('opaclayoutstylesheet');
 113
 114     # add variables set via param to $vars for processing
 115     for my $k ( keys %{ $self->{VARS} } ) {
 116         $vars->{$k} = $self->{VARS}->{$k};
 117     }
 118
 119     my $data;
 120     binmode( STDOUT, ":utf8" );
 121     $template->process( $self->filename, $vars, \$data )
 122       || die "Template process failed: ", $template->error();
 123     return $data;
 124 }
 125
 126 # wrapper method to allow easier transition from HTML template pro to Template Toolkit
 127 sub param {
 128     my $self = shift;
 129     while (@_) {
 130         my $key = shift;
 131         my $val = shift;
 132         if    ( ref($val) eq 'ARRAY' && !scalar @$val ) { $val = undef; }
 133         elsif ( ref($val) eq 'HASH'  && !scalar %$val ) { $val = undef; }
 134         if ( $key ) {
 135             $self->{VARS}->{$key} = $val;
 136         } else {
 137             warn "Problem = a value of $val has been passed to param without key";
 138         }
 139     }
 140 }
 141
 142
 143 =head1 NAME
 144
 145 C4::Templates - Functions for managing templates
 146
 147 =head1 FUNCTIONS
 148
 149 =cut
 150
 151 # FIXME: this is a quick fix to stop rc1 installing broken
 152 # Still trying to figure out the correct fix.
 153 my $path = C4::Context->config('intrahtdocs') . "/prog/en/includes/";
 154
 155 #---------------------------------------------------------------------------------------------------------
 156 # FIXME - POD
 157
 158 sub _get_template_file {
 159     my ($tmplbase, $interface, $query) = @_;
 160
 161     my $is_intranet = $interface eq 'intranet';
 162     my $htdocs = C4::Context->config($is_intranet ? 'intrahtdocs' : 'opachtdocs');
 163     my ($theme, $lang, $availablethemes) = themelanguage($htdocs, $tmplbase, $interface, $query);
 164     my $filename = "$htdocs/$theme/$lang/modules/$tmplbase";
 165
 166     return ($htdocs, $theme, $lang, $filename);
 167 }
 168
 169
 170 sub gettemplate {
 171     my ( $tmplbase, $interface, $query, $is_plugin ) = @_;
 172     ($query) or warn "no query in gettemplate";
 173     my $path = C4::Context->preference('intranet_includes') || 'includes';
 174     my ($htdocs, $theme, $lang, $filename)
 175        =  _get_template_file($tmplbase, $interface, $query);
 176     $filename = $tmplbase if ( $is_plugin );
 177     my $template = C4::Templates->new($interface, $filename, $tmplbase, $query);
 178
 179 # NOTE: Commenting these out rather than deleting them so that those who need
 180 # to know how we previously shimmed these directories will be able to understand.
 181 #    my $is_intranet = $interface eq 'intranet';
 182 #    my $themelang =
 183 #        ($is_intranet ? '/intranet-tmpl' : '/opac-tmpl') .
 184 #        "/$theme/$lang";
 185 #    $template->param(
 186 #        themelang => $themelang,
 187 #        interface => $is_intranet ? '/intranet-tmpl' : '/opac-tmpl',
 188 #        theme     => $theme,
 189 #        lang      => $lang
 190 #    );
 191
 192     # Bidirectionality, must be sent even if is the only language
 193     my $current_lang = regex_lang_subtags($lang);
 194     my $bidi;
 195     $bidi = get_bidi($current_lang->{script}) if $current_lang->{script};
 196     $template->param(
 197             bidi                 => $bidi,
 198     );
 199     # Languages
 200     my $languages_loop = getTranslatedLanguages($interface,$theme,$lang);
 201     my $num_languages_enabled = 0;
 202     foreach my $lang (@$languages_loop) {
 203         foreach my $sublang (@{ $lang->{'sublanguages_loop'} }) {
 204             $num_languages_enabled++ if $sublang->{enabled};
 205          }
 206     }
 207     my $one_language_enabled = ($num_languages_enabled <= 1) ? 1 : 0; # deal with zero enabled langs as well
 208     $template->param(
 209             languages_loop       => $languages_loop,
 210             one_language_enabled => $one_language_enabled,
 211     ) unless $one_language_enabled;
 212
 213     return $template;
 214 }
 215
 216
 217 =head2 themelanguage
 218
 219     my ($theme,$lang,\@themes) = themelanguage($htdocs,$tmpl,$interface,query);
 220
 221 This function returns the theme and language to be used for rendering the UI.
 222 It also returns the list of themes that should be applied as a fallback. This is
 223 used for the theme overlay feature (i.e. if a file doesn't exist on the requested
 224 theme, fallback to the configured fallback).
 225
 226 Important: this function is used on the webinstaller too, so always consider
 227 the use case where the DB is not populated already when rewriting/fixing.
 228
 229 =cut
 230
 231 sub themelanguage {
 232     my ($htdocs, $tmpl, $interface, $query) = @_;
 233     ($query) or warn "no query in themelanguage";
 234
 235     # Select a language based on cookie, syspref available languages & browser
 236     my $lang = C4::Languages::getlanguage($query);
 237
 238     # Get theme
 239     my @themes;
 240     my $theme_syspref    = ($interface eq 'intranet') ? 'template' : 'opacthemes';
 241     my $fallback_syspref = ($interface eq 'intranet') ? 'template' : 'OPACFallback';
 242     # Yeah, hardcoded, last resort if the DB is not populated
 243     my $hardcoded_theme = ($interface eq 'intranet') ? 'prog' : 'bootstrap';
 244
 245     # Configured theme is the first one
 246     push @themes, C4::Context->preference( $theme_syspref )
 247         if C4::Context->preference( $theme_syspref );
 248     # Configured fallback next
 249     push @themes, C4::Context->preference( $fallback_syspref )
 250         if C4::Context->preference( $fallback_syspref );
 251     # The hardcoded fallback theme is the last one
 252     push @themes, $hardcoded_theme;
 253
 254     # Try to find first theme for the selected theme/lang, then for fallback/lang
 255     my $where = $tmpl =~ /xsl$/ ? 'xslt' : 'modules';
 256     for my $theme (@themes) {
 257         if ( -e "$htdocs/$theme/$lang/$where/$tmpl" ) {
 258             return ( $theme, $lang, uniq( \@themes ) );
 259         }
 260     }
 261     # Otherwise return theme/'en', last resort fallback/'en'
 262     for my $theme (@themes) {
 263         if ( -e "$htdocs/$theme/en/$where/$tmpl" ) {
 264             return ( $theme, 'en', uniq( \@themes ) );
 265         }
 266     }
 267     # tmpl is a full path, so this is a template for a plugin
 268     if ( $tmpl =~ /^\// && -e $tmpl ) {
 269         return ( $themes[0], $lang, uniq( \@themes ) );
 270     }
 271 }
 272
 273
 274 sub setlanguagecookie {
 275     my ( $query, $language, $uri ) = @_;
 276
 277     my $cookie = $query->cookie(
 278         -name    => 'KohaOpacLanguage',
 279         -value   => $language,
 280         -HttpOnly => 1,
 281         -expires => '+3y'
 282     );
 283     print $query->redirect(
 284         -uri    => $uri,
 285         -cookie => $cookie
 286     );
 287 }
 288
 289 =head2 getlanguagecookie
 290
 291     my $cookie = getlanguagecookie($query,$language);
 292
 293 Returns a cookie object containing the calculated language to be used.
 294
 295 =cut
 296
 297 sub getlanguagecookie {
 298     my ( $query, $language ) = @_;
 299     my $cookie = $query->cookie(
 300         -name    => 'KohaOpacLanguage',
 301         -value   => $language,
 302         -HttpOnly => 1,
 303         -expires => '+3y'
 304     );
 305
 306     return $cookie;
 307 }
 308
 309 =head2 GetColumnDefs
 310
 311     my $columns = GetColumnDefs( $cgi )
 312
 313 It is passed a CGI object and returns a hash of hashes containing
 314 the column names and descriptions for each table defined in the
 315 columns.def file corresponding to the CGI object.
 316
 317 =cut
 318
 319 sub GetColumnDefs {
 320
 321     my $query = shift;
 322
 323     my $columns = {};
 324
 325     my $htdocs = C4::Context->config('intrahtdocs');
 326     my $columns_file = 'columns.def';
 327
 328     # Get theme and language to build the path to columns.def
 329     my ($theme, $lang, $availablethemes) =
 330         themelanguage($htdocs, 'about.tt', 'intranet', $query);
 331     # Build columns.def path
 332     my $path = "$htdocs/$theme/$lang/$columns_file";
 333     my $fh;
 334     if ( ! open ( $fh, q{<}, $path ) )  {
 335         carp "Error opening $path. Check your templates.";
 336         return;
 337     }
 338     # Loop through the columns.def file
 339     while ( my $input = <$fh> ){
 340         chomp $input;
 341         if ( $input =~ m|<field name="(.*)">(.*)</field>| ) {
 342             my ( $table, $column ) =  split( '\.', $1);
 343             my $description        = $2;
 344             # Initialize the table array if needed.
 345             @{$columns->{ $table }} = () if ! defined $columns->{ $table };
 346             # Push field and description
 347             push @{$columns->{ $table }},
 348                 { field => $column, description => $description };
 349         }
 350     }
 351     close $fh;
 352
 353     return $columns;
 354 }
 355
 356 1;