C4/Templates.pm

   1 package C4::Templates;
   2
   3 use strict;
   4 use warnings;
   5 use Carp;
   6 use CGI;
   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         }
  73     ) or die Template->error();
  74     my $self = {
  75         TEMPLATE => $template,
  76         VARS     => {},
  77     };
  78     bless $self, $class;
  79     $self->theme($theme);
  80     $self->lang($lang);
  81     $self->activethemes($activethemes);
  82     $self->preferredtheme($activethemes->[0]);
  83     $self->filename($filename);
  84     $self->htdocs($htdocs);
  85     $self->interface($interface);
  86     $self->{VARS}->{"test"} = "value";
  87     return $self;
  88
  89 }
  90
  91 sub output {
  92     my $self = shift;
  93     my $vars = shift;
  94
  95 #    my $file = $self->htdocs . '/' . $self->theme .'/'.$self->lang.'/'.$self->filename;
  96     my $template = $self->{TEMPLATE};
  97     if ( $self->interface eq 'intranet' ) {
  98         $vars->{themelang} = '/intranet-tmpl';
  99     }
 100     else {
 101         $vars->{themelang} = '/opac-tmpl';
 102     }
 103     $vars->{lang} = $self->lang;
 104     $vars->{themelang} .= '/' . $self->preferredtheme . '/' . $self->lang;
 105     $vars->{interface} =
 106       ( $self->{interface} ne 'intranet' ? '/opac-tmpl' : '/intranet-tmpl' );
 107     $vars->{theme} = $self->theme;
 108     $vars->{opaccolorstylesheet} =
 109         C4::Context->preference('opaccolorstylesheet');
 110     $vars->{opaclayoutstylesheet} =
 111         C4::Context->preference('opaclayoutstylesheet');
 112
 113     # add variables set via param to $vars for processing
 114     # and clean any utf8 mess
 115     for my $k ( keys %{ $self->{VARS} } ) {
 116         $vars->{$k} = $self->{VARS}->{$k};
 117         if (ref($vars->{$k}) eq 'ARRAY'){
 118             utf8_arrayref($vars->{$k});
 119         }
 120         elsif (ref($vars->{$k}) eq 'HASH'){
 121             utf8_hashref($vars->{$k});
 122         }
 123         else {
 124             utf8::encode($vars->{$k}) if utf8::is_utf8($vars->{$k});
 125         }
 126     }
 127     my $data;
 128 #    binmode( STDOUT, ":utf8" );
 129     $template->process( $self->filename, $vars, \$data )
 130       || die "Template process failed: ", $template->error();
 131     return $data;
 132 }
 133
 134 sub utf8_arrayref {
 135     my $arrayref = shift;
 136     foreach my $element (@$arrayref){
 137         if (ref($element) eq 'ARRAY'){
 138             utf8_arrayref($element);
 139             next;
 140         }
 141         if (ref($element) eq 'HASH'){
 142             utf8_hashref($element);
 143             next;
 144         }
 145         utf8::encode($element) if utf8::is_utf8($element);
 146     }
 147 }
 148
 149 sub utf8_hashref {
 150     my $hashref = shift;
 151     for my $key (keys %{$hashref}){
 152         if (ref($hashref->{$key}) eq 'ARRAY'){
 153             utf8_arrayref($hashref->{$key});
 154             next;
 155         }
 156         if (ref($hashref->{$key}) eq 'HASH'){
 157             utf8_hashref($hashref->{$key});
 158             next;
 159         }
 160         utf8::encode($hashref->{$key}) if utf8::is_utf8($hashref->{$key});
 161     }
 162 }
 163
 164 # wrapper method to allow easier transition from HTML template pro to Template Toolkit
 165 sub param {
 166     my $self = shift;
 167     while (@_) {
 168         my $key = shift;
 169         my $val = shift;
 170         if    ( ref($val) eq 'ARRAY' && !scalar @$val ) { $val = undef; }
 171         elsif ( ref($val) eq 'HASH'  && !scalar %$val ) { $val = undef; }
 172         if ( $key ) {
 173             $self->{VARS}->{$key} = $val;
 174         } else {
 175             warn "Problem = a value of $val has been passed to param without key";
 176         }
 177     }
 178 }
 179
 180
 181 =head1 NAME
 182
 183 C4::Templates - Functions for managing templates
 184
 185 =head1 FUNCTIONS
 186
 187 =cut
 188
 189 # FIXME: this is a quick fix to stop rc1 installing broken
 190 # Still trying to figure out the correct fix.
 191 my $path = C4::Context->config('intrahtdocs') . "/prog/en/includes/";
 192
 193 #---------------------------------------------------------------------------------------------------------
 194 # FIXME - POD
 195
 196 sub _get_template_file {
 197     my ($tmplbase, $interface, $query) = @_;
 198
 199     my $is_intranet = $interface eq 'intranet';
 200     my $htdocs = C4::Context->config($is_intranet ? 'intrahtdocs' : 'opachtdocs');
 201     my ($theme, $lang, $availablethemes) = themelanguage($htdocs, $tmplbase, $interface, $query);
 202     my $filename = "$htdocs/$theme/$lang/modules/$tmplbase";
 203
 204     return ($htdocs, $theme, $lang, $filename);
 205 }
 206
 207
 208 sub gettemplate {
 209     my ( $tmplbase, $interface, $query, $is_plugin ) = @_;
 210     ($query) or warn "no query in gettemplate";
 211     my $path = C4::Context->preference('intranet_includes') || 'includes';
 212     my ($htdocs, $theme, $lang, $filename)
 213        =  _get_template_file($tmplbase, $interface, $query);
 214     $filename = $tmplbase if ( $is_plugin );
 215     my $template = C4::Templates->new($interface, $filename, $tmplbase, $query);
 216
 217 # NOTE: Commenting these out rather than deleting them so that those who need
 218 # to know how we previously shimmed these directories will be able to understand.
 219 #    my $is_intranet = $interface eq 'intranet';
 220 #    my $themelang =
 221 #        ($is_intranet ? '/intranet-tmpl' : '/opac-tmpl') .
 222 #        "/$theme/$lang";
 223 #    $template->param(
 224 #        themelang => $themelang,
 225 #        interface => $is_intranet ? '/intranet-tmpl' : '/opac-tmpl',
 226 #        theme     => $theme,
 227 #        lang      => $lang
 228 #    );
 229
 230     # Bidirectionality, must be sent even if is the only language
 231     my $current_lang = regex_lang_subtags($lang);
 232     my $bidi;
 233     $bidi = get_bidi($current_lang->{script}) if $current_lang->{script};
 234     $template->param(
 235             bidi                 => $bidi,
 236     );
 237     # Languages
 238     my $languages_loop = getTranslatedLanguages($interface,$theme,$lang);
 239     my $num_languages_enabled = 0;
 240     foreach my $lang (@$languages_loop) {
 241         foreach my $sublang (@{ $lang->{'sublanguages_loop'} }) {
 242             $num_languages_enabled++ if $sublang->{enabled};
 243          }
 244     }
 245     my $one_language_enabled = ($num_languages_enabled <= 1) ? 1 : 0; # deal with zero enabled langs as well
 246     $template->param(
 247             languages_loop       => $languages_loop,
 248             one_language_enabled => $one_language_enabled,
 249     ) unless $one_language_enabled;
 250
 251     return $template;
 252 }
 253
 254
 255 =head2 themelanguage
 256
 257     my ($theme,$lang,\@themes) = themelanguage($htdocs,$tmpl,$interface,query);
 258
 259 This function returns the theme and language to be used for rendering the UI.
 260 It also returns the list of themes that should be applied as a fallback. This is
 261 used for the theme overlay feature (i.e. if a file doesn't exist on the requested
 262 theme, fallback to the configured fallback).
 263
 264 Important: this function is used on the webinstaller too, so always consider
 265 the use case where the DB is not populated already when rewriting/fixing.
 266
 267 =cut
 268
 269 sub themelanguage {
 270     my ($htdocs, $tmpl, $interface, $query) = @_;
 271     ($query) or warn "no query in themelanguage";
 272
 273     # Select a language based on cookie, syspref available languages & browser
 274     my $lang = C4::Languages::getlanguage($query);
 275
 276     # Get theme
 277     my @themes;
 278     my $theme_syspref    = ($interface eq 'intranet') ? 'template' : 'opacthemes';
 279     my $fallback_syspref = ($interface eq 'intranet') ? 'template' : 'OPACFallback';
 280     # Yeah, hardcoded, last resort if the DB is not populated
 281     my $hardcoded_theme = ($interface eq 'intranet') ? 'prog' : 'bootstrap';
 282
 283     # Configured theme is the first one
 284     push @themes, C4::Context->preference( $theme_syspref )
 285         if C4::Context->preference( $theme_syspref );
 286     # Configured fallback next
 287     push @themes, C4::Context->preference( $fallback_syspref )
 288         if C4::Context->preference( $fallback_syspref );
 289     # The hardcoded fallback theme is the last one
 290     push @themes, $hardcoded_theme;
 291
 292     # Try to find first theme for the selected theme/lang, then for fallback/lang
 293     my $where = $tmpl =~ /xsl$/ ? 'xslt' : 'modules';
 294     for my $theme (@themes) {
 295         if ( -e "$htdocs/$theme/$lang/$where/$tmpl" ) {
 296             return ( $theme, $lang, uniq( \@themes ) );
 297         }
 298     }
 299     # Otherwise return theme/'en', last resort fallback/'en'
 300     for my $theme (@themes) {
 301         if ( -e "$htdocs/$theme/en/$where/$tmpl" ) {
 302             return ( $theme, 'en', uniq( \@themes ) );
 303         }
 304     }
 305 }
 306
 307
 308 sub setlanguagecookie {
 309     my ( $query, $language, $uri ) = @_;
 310
 311     my $cookie = $query->cookie(
 312         -name    => 'KohaOpacLanguage',
 313         -value   => $language,
 314         -HttpOnly => 1,
 315         -expires => '+3y'
 316     );
 317     print $query->redirect(
 318         -uri    => $uri,
 319         -cookie => $cookie
 320     );
 321 }
 322
 323 =head2 getlanguagecookie
 324
 325     my $cookie = getlanguagecookie($query,$language);
 326
 327 Returns a cookie object containing the calculated language to be used.
 328
 329 =cut
 330
 331 sub getlanguagecookie {
 332     my ( $query, $language ) = @_;
 333     my $cookie = $query->cookie(
 334         -name    => 'KohaOpacLanguage',
 335         -value   => $language,
 336         -HttpOnly => 1,
 337         -expires => '+3y'
 338     );
 339
 340     return $cookie;
 341 }
 342
 343 =head2 GetColumnDefs
 344
 345     my $columns = GetColumnDefs( $cgi )
 346
 347 It is passed a CGI object and returns a hash of hashes containing
 348 the column names and descriptions for each table defined in the
 349 columns.def file corresponding to the CGI object.
 350
 351 =cut
 352
 353 sub GetColumnDefs {
 354
 355     my $query = shift;
 356
 357     my $columns = {};
 358
 359     my $htdocs = C4::Context->config('intrahtdocs');
 360     my $columns_file = 'columns.def';
 361
 362     # Get theme and language to build the path to columns.def
 363     my ($theme, $lang, $availablethemes) =
 364         themelanguage($htdocs, 'about.tt', 'intranet', $query);
 365     # Build columns.def path
 366     my $path = "$htdocs/$theme/$lang/$columns_file";
 367     my $fh;
 368     if ( ! open ( $fh, q{<}, $path ) )  {
 369         carp "Error opening $path. Check your templates.";
 370         return;
 371     }
 372     # Loop through the columns.def file
 373     while ( my $input = <$fh> ){
 374         chomp $input;
 375         if ( $input =~ m|<field name="(.*)">(.*)</field>| ) {
 376             my ( $table, $column ) =  split( '\.', $1);
 377             my $description        = $2;
 378             # Initialize the table array if needed.
 379             @{$columns->{ $table }} = () if ! defined $columns->{ $table };
 380             # Push field and description
 381             push @{$columns->{ $table }},
 382                 { field => $column, description => $description };
 383         }
 384     }
 385     close $fh;
 386
 387     return $columns;
 388 }
 389
 390 1;