Rev 659 | Blame | Compare with Previous | Last modification | View Log | RSS feed
<?php
// php reader of AMB files -- turns an AMB book into a web page
//
// Copyright (C) 2020-2022 Mateusz Viste
// http://amb.osdn.io
//
// MIT license
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
$VERSION = "20220212";
function getamafile($ambfname, $amafname) {
if (! is_file($ambfname)) {
// if its a flat dir, just load the file
if (is_dir($ambfname)) return(file_get_contents($ambfname . '/' . $amafname));
return(FALSE);
}
$fd = fopen($ambfname, "rb");
if ($fd === FALSE) return(FALSE);
// read header (AMB1)
if (fread($fd, 4) !== 'AMB1') return(FALSE);
// read number of ama files inside
$fcount = reset(unpack('v', fread($fd, 2)));
if ($fcount === FALSE) return(FALSE);
// read index until AMA file is found
$offset = 0;
$amalen = 0;
$amafile = '';
for ($i = 0; $i < $fcount; $i++) {
$amafile = rtrim(fread($fd, 12), "\0");
$offset = reset(unpack('V', fread($fd, 4)));
$amalen = reset(unpack('v', fread($fd, 2)));
$bsum = reset(unpack('v', fread($fd, 2)));
if (strcasecmp($amafile, $amafname) == 0) break;
}
if ($i >= $fcount) return(FALSE); // not found
// jump to offset and read file
fseek($fd, $offset);
$result = fread($fd, $amalen);
fclose($fd);
return($result);
}
// converts str into utf-8 using the unicodemap lookup table and returns the resulting (converted) str
function txttoutf8($str, $unicodemap) {
$s = str_split($str, 1); // convert the string to a table for
$res = '';
foreach ($s as $c) $res .= $unicodemap[ord($c)]; // convert raw characters into HTML unicode codes
return($res);
}
// MAIN STARTS HERE
if (empty($_GET['fname'])) {
echo "usage: phpamb.php?fname=file.amb\n";
exit(0);
}
$ambfname = $_GET['fname'];
$f = 'index.ama'; // default file
if (! empty($_GET['f'])) $f = $_GET['f'];
$title = trim(getamafile($ambfname, 'title'));
if ($title === FALSE) $title = $ambfname;
$ama = getamafile($ambfname, $f);
if ($ama === FALSE) $ama = 'ERROR: FILE NOT FOUND';
// prepare a 256-entries lookup array for unicode encoding
$unicodemap = array();
for ($i = 0; $i < 128; $i++) $unicodemap[$i] = $i; // low ascii is the same
$unicodemaptemp = unpack('v128', getamafile($ambfname, 'unicode.map'));
if ($unicodemaptemp === FALSE) {
$unicodemap = FALSE;
} else {
$unicodemap = array_merge($unicodemap, $unicodemaptemp);
/* convert the unicode map so it contains actual html code instead of glyph values */
for ($i = 0; $i < 256; $i++) {
if ($unicodemap[$i] < 128) {
$unicodemap[$i] = htmlspecialchars(chr($unicodemap[$i]), ENT_HTML5);
} else {
$unicodemap[$i] = '&#' . $unicodemap[$i] . ';';
}
}
// perform UTF-8 conversion of the title
$title = txttoutf8($title, $unicodemap);
}
echo "<!DOCTYPE html>\n";
echo "<html>\n";
echo "<head>\n";
echo ' <meta charset="UTF-8">' . "\n";
echo " <title>{$title}</title>\n";
echo ' <link rel="stylesheet" href="phpamb.css">' . "\n";
echo ' <meta name="viewport" content="width=device-width, initial-scale=1">' . "\n";
echo " <meta name=\"generator\" content=\"phpamb/{$VERSION}\">\n";
echo "</head>\n";
echo "<body>";
echo "<div><span><a href=\"?fname={$ambfname}\" class=\"liketext\">{$title}</a></span><span>[" . pathinfo($f, PATHINFO_FILENAME) . "]</span></div>\n";
/* detect links first, before any htmlization occurs */
$ama = preg_replace('!(https?|ftp)://([-A-Z0-9./_*?&;%=#~:]+)!i', 'LiNkStArTxXx$0LiNkEnDxXx', $ama);
if ($unicodemap !== FALSE) {
$amacontent = str_split($ama, 1);
} else {
$amacontent = mb_str_split($ama, 1, 'utf-8');
}
$escnow = 0; // next char is an escape code
$readlink = 0; // a link target is being read
$opentag = ''; // do I have a currently open html tag?
$out = '';
foreach ($amacontent as $c) {
// ignore CR
if ($c == "\r") continue;
// is link target being read?
if ($readlink != 0) {
if (($c == "\n") || ($c == ':')) {
$out .= '">';
$opentag = 'a';
$readlink = 0;
if ($c == ':') continue;
} else {
$out .= urlencode($c);
}
continue;
}
//
if ($escnow != 0) {
if ($c == '%') {
$out .= '%';
} else if ($c == 'l') {
$out .= '<a href="' . $_SERVER['PHP_SELF'] . "?fname={$ambfname}&f=";
$readlink = 1;
} else if ($c == 'h') {
$out .= '<h1>';
$opentag = 'h1';
} else if ($c == '!') {
$out .= '<span class="notice">';
$opentag = 'span';
} else if ($c == 'b') {
$out .= '<span class="boring">';
$opentag = 'span';
}
$escnow = 0;
continue;
}
// close </a> if open and got LF or new tag
if ((!empty($opentag)) && (($c == "\n") || ($c == "%"))) {
$out .= "</{$opentag}>";
$opentag = '';
}
//
if ($c == '%') {
$escnow = 1;
} else {
if ($unicodemap !== FALSE) {
$out .= $unicodemap[ord($c)]; // convert characters into HTML unicode codes
} else {
$out .= htmlspecialchars($c);
}
}
}
// close open tags
if (!empty($opentag)) {
$out .= "</{$opentag}>";
$opentag = '';
}
/* postprocessing: find links detected earlier and change them to proper anchors */
$out = preg_replace('/LiNkStArTxXx.*LiNkEnDxXx/', '<a href="$0">$0</a>', $out);
$out = preg_replace('/(LiNkStArTxXx)|(LiNkEnDxXx)/', '', $out);
echo $out;
echo "</body>\n";
echo "</html>\n";
?>