IkiWiki/Plugin/conditional.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::conditional;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 2.00;
   7 use UNIVERSAL;
   8
   9 sub import { #{{{
  10         hook(type => "preprocess", id => "if", call => \&preprocess_if);
  11 } # }}}
  12
  13 sub preprocess_if (@) { #{{{
  14         my %params=@_;
  15
  16         foreach my $param (qw{test then}) {
  17                 if (! exists $params{$param}) {
  18                         return "[[if ".sprintf(gettext('%s parameter is required'), $param)."]]";
  19                 }
  20         }
  21
  22         my $result=0;
  23         if ((exists $params{all} && lc $params{all} eq "no") ||
  24                 # An optimisation to avoid needless looping over every page
  25                 # and adding of dependencies for simple uses of some of the
  26                 # tests.
  27                 $params{test} =~ /^(enabled|sourcepage|destpage)\((.*)\)$/) {
  28                 add_depends($params{page}, "$params{test} and $params{page}");
  29                 $result=pagespec_match($params{page}, $params{test},
  30                                 location => $params{page},
  31                                 sourcepage => $params{page},
  32                                 destpage => $params{destpage});
  33         }
  34         else {
  35                 add_depends($params{page}, $params{test});
  36
  37                 foreach my $page (keys %pagesources) {
  38                         if (pagespec_match($page, $params{test},
  39                                         location => $params{page},
  40                                         sourcepage => $params{page},
  41                                         destpage => $params{destpage})) {
  42                                 $result=1;
  43                                 last;
  44                         }
  45                 }
  46         }
  47
  48         my $ret;
  49         if ($result) {
  50                 $ret=$params{then};
  51         }
  52         elsif (exists $params{else}) {
  53                 $ret=$params{else};
  54         }
  55         else {
  56                 $ret="";
  57         }
  58         return IkiWiki::preprocess($params{page}, $params{destpage},
  59                 IkiWiki::filter($params{page}, $params{destpage}, $ret));
  60 } # }}}
  61
  62 package IkiWiki::PageSpec;
  63
  64 sub match_enabled ($$;@) { #{{{
  65         shift;
  66         my $plugin=shift;
  67
  68         # test if the plugin is enabled
  69         if (UNIVERSAL::can("IkiWiki::Plugin::".$plugin, "import")) {
  70                 return IkiWiki::SuccessReason->new("$plugin is enabled");
  71         }
  72         else {
  73                 return IkiWiki::FailReason->new("$plugin is not enabled");
  74         }
  75 } #}}}
  76
  77 sub match_sourcepage ($$;@) { #{{{
  78         shift;
  79         my $glob=shift;
  80         my %params=@_;
  81
  82         return IkiWiki::FailReason->new("cannot match sourcepage") unless exists $params{sourcepage};
  83         if (match_glob($params{sourcepage}, $glob, @_)) {
  84                 return IkiWiki::SuccessReason->new("sourcepage matches $glob");
  85         }
  86         else {
  87                 return IkiWiki::FailReason->new("sourcepage does not match $glob");
  88         }
  89 } #}}}
  90
  91 sub match_destpage ($$;@) { #{{{
  92         shift;
  93         my $glob=shift;
  94         my %params=@_;
  95
  96         return IkiWiki::FailReason->new("cannot match destpage") unless exists $params{destpage};
  97         if (match_glob($params{destpage}, $glob, @_)) {
  98                 return IkiWiki::SuccessReason->new("destpage matches $glob");
  99         }
 100         else {
 101                 return IkiWiki::FailReason->new("destpage does not match $glob");
 102         }
 103 } #}}}
 104
 105 sub match_included ($$;$) { #{{{
 106         shift;
 107         shift;
 108         my %params=@_;
 109
 110         return IkiWiki::FailReason->new("cannot match included") unless exists $params{sourcepage} && exists $params{destpage};
 111         if ($params{sourcepage} ne $params{destpage}) {
 112                 return IkiWiki::SuccessReason->new("page $params{sourcepage} is included");
 113         }
 114         else {
 115                 return IkiWiki::FailReason->new("page $params{sourcepage} is not included");
 116         }
 117 } #}}}
 118
 119 1