186 lines
5.9 KiB
PHP
186 lines
5.9 KiB
PHP
<?php
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if (isset($_REQUEST["url"]))
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$url = $_REQUEST["url"];
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elseif (isset($_SERVER["QUERY_STRING"]))
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$url = "/".$_SERVER["QUERY_STRING"];
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else
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$url = "/index.gmi";
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$GMI_DIR = $_SERVER['DOCUMENT_ROOT'];
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$filePath = $GMI_DIR.$url;
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$fileContent = @file_get_contents($filePath);
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if (!$fileContent) {
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http_response_code(404);
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die("404: $filePath $GMI_DIR $url");
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}
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$fileLines = preg_split("/\n/", $fileContent);
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ob_start();
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echo(<<<EOL
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<!DOCTYPE html>
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<html lang="fr">
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<head>
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<title>HTM Gem</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- link type="text/css" rel="StyleSheet" href="/htmgem.css" -->
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<style>
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EOL
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);
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include("htmgem.css");
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echo(<<<EOL
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</style>
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</head>
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<body>
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EOL);
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/**
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* Replaces markups things like __underlined__ to <u>underlined</u>.
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* @param $instruction the characters to replace, ex. _
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* @param $markup the markup to replace to, ex. "u" to get <u>…</u>
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* @param &$text where to replace.
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*/
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function markupPreg($instruction, $markup, &$text) {
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#return preg_replace("#{$instruction}((?!{$instruction}.)+)(?:{$instruction})?#", "<{$markup}>$1</{$markup}>", $text);
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$output = $text;
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# Replaces couples "__word__" into "<i>word</i>".
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$output = preg_replace("#${instruction}(.+?)${instruction}#", "<{$markup}>$1</{$markup}>", $output);
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# Replaces a remaining __ into "<i>…</i>" to the end of the line.
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$output = preg_replace("#${instruction}(.+)#", "<{$markup}>$1</{$markup}>", $output);
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$text = $output;
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}
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/**
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* Adds text attributes sucj as underline, bold, … to $line
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* @param $line the line to process
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*/
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function addTextAttributes(&$line) {
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markupPreg("__", "u", $line);
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markupPreg("\*\*", "b", $line);
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markupPreg("//", "i", $line);
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markupPreg("~~", "del", $line);
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}
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/**
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* Escapes the HTML entities yet contained in the Gemtext, keeps multiple spaces.
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* @param $text1, $text2 texts to process
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*/
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function htmlEscape(&$text1, &$text2=null) {
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$text1 = htmlspecialchars($text1, ENT_HTML5, "UTF-8", false);
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# https://en.wikipedia.org/wiki/Whitespace_character#Unicode
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$text1 = preg_replace("# #", "  ", $text1); #TODO: a way to not touch single spaces as " " > " "
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if (!is_null($text2)) return htmlEscape($text2);
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}
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$mode = null;
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$mode_textAttributes = true;
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foreach ($fileLines as $line) {
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$reDo = true;
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$line1 = substr($line, 0, 1);
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$line2 = substr($line, 0, 2);
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$line3 = substr($line, 0, 3);
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while ($reDo) {
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$reDo = false; # Change in modes need to redo one loop as they can’t handle the case
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if (is_null($mode)) {
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if (empty($line)) {
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print("<p> </p>\n");
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} elseif ("#" == $line1) {
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preg_match("/^(#{1,3})\s*(.*)/", $line, $sharps);
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$h_level = strlen($sharps[1]);
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$text = $sharps[2];
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htmlEscape($text);
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switch ($h_level) {
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case 1: print("<h1>".$text."</h1>\n"); break;
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case 2: print("<h2>".$text."</h2>\n"); break;
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case 3: print("<h3>".$text."</h3>\n"); break;
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}
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} elseif ("=>" == $line2) {
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preg_match("/^=>\s*([^\s]+)\s*(.*)$/", $line, $linkParts);
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$url_link = $linkParts[1];
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$url_label = $linkParts[2];
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if (empty($url_label)) $url_label = $url_link;
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htmlEscape($url_link, $url_label);
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if ($mode_textAttributes) addTextAttributes($url_label);
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print("<p><a href='".$url_link."'>".$url_label."</a></p>\n");
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} elseif ('"""' == $line3) {
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$mode_textAttributes = !$mode_textAttributes;
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$reDo = true;
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} elseif ("```" == $line3) {
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$mode="pre";
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print("<pre>\n");
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} elseif (">" == $line1) {
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$mode = "quote";
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preg_match("/^>\s*(.*)$/", $line, $quoteParts);
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$quote = $quoteParts[1];
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print("<blockquote>\n");
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if (empty($quote))
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print("<p> </p>\n");
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else
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htmlEscape($quote);
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print("<p>".$quote."</p>\n");
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} elseif ("*" == $line1 && "**" != $line2) {
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$mode = "ul";
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$reDo = true;
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print("<ul>\n");
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} else {
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htmlEscape($line);
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if ($mode_textAttributes) addTextAttributes($line);
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print("<p>$line</p>\n");
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}
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} elseif ("pre"==$mode) {
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if ("```" == $line3) {
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$mode=null;
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print("</pre>\n");
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} else {
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htmlEscape($line);
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if ($mode_textAttributes) addTextAttributes($line);
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print($line."\n");
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}
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} elseif ("quote"==$mode) {
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if (">" == $line1) {
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preg_match("/^>\s*(.*)$/", $line, $quoteParts);
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$quote = $quoteParts[1];
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if (empty($quote))
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print("<p> </p>\n");
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else
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htmlEscape($quote);
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print("<p>".$quote."</p>\n");
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} else {
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print("</blockquote>\n");
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$mode=null;
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$reDo=true;
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}
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} elseif ("ul"==$mode) {
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if ("*" == $line1 && "**" != $line2) {
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preg_match("/^\*\s*(.*)$/", $line, $ulParts);
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$li = $ulParts[1];
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if (empty($li))
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print("<li> \n");
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else
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htmlEscape($li);
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print("<li>".$li."\n");
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} else {
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$mode = null;
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print("</ul>\n");
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$reDo = true;
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}
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}
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$line = "";
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}
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}
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echo "</body>\n</html>\n";
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ob_end_flush();
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?>
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