git.shemshak.org - ~bandali/bndl.org/blob - txt2html

   1 #!/usr/bin/env perl
   2 # txt2html --- simple script to convert my site's txt files to html
   3
   4 # Copyright (C) 2014-2021 all contributors <meta@public-inbox.org>
   5 # Copyright (c) 2021 Amin Bandali <bandali@gnu.org>
   6 #
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU Affero General Public License as
   9 # published by the Free Software Foundation, either version 3 of the
  10 # License, or (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU Affero General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU Affero General Public License
  18 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19
  20 # This simple script borrows from the wonderful `txt2pre' from
  21 # public-inbox.git, under AGPLv3+, with a few additions of my own.
  22
  23
  24 use strict;
  25 use warnings 'all';
  26 use Getopt::Long;
  27
  28 my $opt_lang = 'en';
  29 my $opt_index;
  30 GetOptions ('lang=s' => \$opt_lang,
  31             'index' => \$opt_index)
  32     or die("bad command line arguments\n");
  33
  34 my $link_re =
  35     qr{([\('!])?\b((?:ftps?|https?|nntps?|imaps?|s?news|gopher)://
  36        [\@:\w\.-]+(?:/
  37          (?:[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%]*)
  38          (?:\?[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%]+)?
  39          (?:\#[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%\?]+)?
  40        )?
  41     )}xi;
  42
  43 my %pairs = (
  44     "(" => qr/(\)[\.,;\+]?)\z/, # Markdown (,), Ruby (+) (, for arrays)
  45     "'" => qr/('[\.,;\+]?)\z/, # Perl / Ruby
  46     "!" => qr/(![\.,;\+]?)\z/, # Perl / Ruby
  47 );
  48
  49 my %html_map = (
  50     '&' => '&amp;',
  51     '<' => '&lt;',
  52     '>' => '&gt;',
  53     # '"' => '&quot;',
  54     # "'" => '&#39;',
  55 );
  56
  57 sub html_esc {
  58     my ($s) = @_;
  59     $s =~ s/([&<>])/$html_map{$1}/sge;
  60     $s;
  61 }
  62
  63 sub linkify {
  64     my ($s) = @_;
  65     $s =~ s^$link_re^
  66         my $beg = $1 || '';
  67         my $url = $2;
  68         my $end = '';
  69
  70         # it's fairly common to end URLs in messages with
  71         # '.', ',' or ';' to denote the end of a statement;
  72         # assume the intent was to end the statement/sentence
  73         # in English
  74         if (defined(my $re = $pairs{$beg})) {
  75             if ($url =~ s/$re//) {
  76                 $end = $1;
  77             }
  78         } elsif ($url =~ s/(\))?([\.,;])\z//) {
  79             $end = $2;
  80             # require ')' to be paired with '('
  81             if (defined $1) { # ')'
  82                 if (index($url, '(') < 0) {
  83                     $end = ")$end";
  84                 } else {
  85                     $url .= ')';
  86                 }
  87             }
  88         } elsif ($url !~ /\(/ && $url =~ s/\)\z//) {
  89             $end = ')';
  90         }
  91
  92         $beg . "<a href=\"$url\">$url</a>" . $end;
  93     ^geo;
  94     $s;
  95 }
  96
  97
  98 my $txt = do { local $/; <STDIN> };
  99 my $title = html_esc($txt =~ /\A([^\n]+)/);
 100 $title =~ s/^\s+|\s+$//g;
 101 if ($opt_lang eq 'fa') {
 102     $title .= ' &mdash; بندعلی' if $title !~ /بندعلی/;
 103 } else {
 104     $title .= ' &mdash; bandali' if $title !~ /bandali/;
 105 }
 106 my ($url) = $txt =~ /(?:plain text|متن ساده): (.*)\r?\n?\z/;
 107 $url = 'https://bndl.org/bandali-cv.txt'
 108     if (!$url and $title =~ /curriculum vitae/);
 109 $url = html_esc($url) if $url;
 110
 111 $txt = linkify(html_esc($txt));
 112
 113 print("<!doctype html>",
 114       qq(<html lang="$opt_lang"),
 115       $opt_lang eq 'fa' ? ' dir="rtl"' : '',
 116       ">",
 117       qq(<head>
 118 <meta http-equiv="Content-Type"
 119 content="text/html; charset=utf-8" />\n),
 120       "<title>$title</title>\n",
 121       qq(<link rel="icon" href="data:,">\n),
 122       $url ? qq(<link rel="alternate" href="$url"
 123 title="plain text" type="text/plain" />\n) : '',
 124       ($opt_index and $opt_lang eq 'en')
 125       ? qq(<link rel="alternate" href="https://bndl.org/fa/"
 126 hreflang="fa" title="persian" />\n)
 127       : ($opt_index and $opt_lang eq 'fa')
 128       ? qq(<link rel="alternate" href="https://bndl.org/"
 129 hreflang="en" title="english" />\n)
 130       : '',
 131       qq(<style>\@media(prefers-color-scheme:dark){
 132 body{background:#1c1c1c;color:white;}a:link{color:#acdeff;}
 133 a:visited{color:#f8f;}a:active{color:#e00;}}),
 134       $opt_lang eq 'fa'
 135       ? qq(\n\@font-face{font-family:sahel;font-weight:normal;
 136 src:local('Sahel WOL'),local('Sahel'),
 137 url('sahel.woff2')format('woff2');}pre{font-family:sahel})
 138       : '',
 139       "</style>\n",
 140       "</head><body><pre>$txt</pre></body></html>\n");
 141 STDOUT->flush;