169 lines
4.5 KiB
JavaScript
169 lines
4.5 KiB
JavaScript
const path = require("path");
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const fs = require("fs"),
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readline = require("readline");
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let preformattedText = false;
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//take input
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const args = process.argv.slice(2);
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const inputFile = args[0];
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const outputFile = args[1];
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let toMarkdown = false;
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const header =
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`
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="generator" content="geminut" />
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<link rel="stylesheet" href="gmi.css">
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<title>` +
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outputFile +
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`</title>
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</head>
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<body>
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`;
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const footer = `
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</body>
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</html>
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`;
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const inputExtension = path.extname(inputFile);
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const outputExtension = path.extname(outputFile);
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if (outputExtension == ".md") {
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toMarkdown = true;
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}
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if (!inputFile || !outputFile) {
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console.log("USAGE: node geminut.js <input.gmi> {output.html | output.md}");
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process.exit(1);
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}
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if (inputExtension !== ".gmi") {
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console.log("Input must be a gemini .gmi file");
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console.log("USAGE: node geminut.js <input.gmi> {output.html | output.md}");
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process.exit(1);
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}
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if (!(outputExtension == ".html" || outputExtension == ".md")) {
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console.log("Output must be a .html HTML or .md Markdown file");
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console.log("USAGE: node geminut.js <input.gmi> {output.html | output.md}");
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process.exit(1);
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}
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if (fs.existsSync(outputFile)) {
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//if already exists we remove first
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fs.unlinkSync(outputFile);
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}
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if (!toMarkdown) {
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fs.appendFileSync(outputFile, header);
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}
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const rd = readline.createInterface({
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input: fs.createReadStream(inputFile),
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//output: process.stdout,
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console: false
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});
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rd.on("line", function(line) {
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// console.log(line);
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let data;
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if (toMarkdown) {
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data = parseGemtextToMarkdown(line);
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fs.appendFileSync(outputFile, data + "\n");
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} else {
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data = parseGemtextToHTML(line);
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fs.appendFileSync(outputFile, data + "\n");
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}
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});
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rd.on("close", function() {
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if (!toMarkdown) {
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fs.appendFileSync(outputFile, footer);
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}
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});
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function parseGemtextToHTML(gmiText) {
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let htmlText;
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//CODE BLOCK SECTION PARSER / CONVERTER
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if (gmiText.match(/^```*(.*$)/gim)) {
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//We are triggering a pre/codeblock to start or end
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//check for code block toggle
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if (!preformattedText) {
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htmlText = gmiText.replace(/^```*(.*$)/gim, "<pre>$1");
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} else {
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htmlText = gmiText.replace(/^```*(.*$)/gim, "</pre>$1");
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}
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preformattedText = !preformattedText; //toggle!
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//END CODE BLOCK SECTION
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} else {
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//we are not on a line with pre/codeblock
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if (!preformattedText) {
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//outside of a codeblock
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htmlText = gmiText
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.replace(/^### (.*$)/gim, "<h3>$1</h3>")
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.replace(/^## (.*$)/gim, "<h2>$1</h2>")
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.replace(/^# (.*$)/gim, "<h1>$1</h1>")
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.replace(/^\* (.*$)/gim, "<ul><li>$1</li></ul>") //hack, would be better to add to ul list
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.replace(/^\> (.*$)/gim, "<blockquote>$1</blockquote>")
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.replace(
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/^=>\s+(\S+(.jpg|.jpeg|.png|.gif|.svg))\s*(.*)/gim,
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"<figure>\n<img src='$1' alt='$3'>\n<figcaption>$3</figcaption>\n</figure>"
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) //for images, must be before links replacement below or else will be captured and converted
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.replace(/^=>\s+(\S+)\s*(.*)/gim, "<p><a href='$1'>$2</a></p>") //close, need to remove gmi
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.replace(".gmi", ".html") //a hack. will break for remote *.gmi url's
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.replace(/^([a-zA-Z0-9].*$)/gim, "<p>$1</p>"); //lines starting with text or number are paragraph
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} else {
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//we are inside a pre/codeblock
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htmlText = gmiText;
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}
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}
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return htmlText;
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}
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function parseGemtextToMarkdown(gmiText) {
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let mdText;
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//CODE BLOCK SECTION PARSER / CONVERTER
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if (gmiText.match(/^```*(.*$)/gim)) {
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//We are triggering a pre/codeblock to start or end
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//check for code block toggle
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if (!preformattedText) {
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mdText = gmiText.replace(/^```*(.*$)/gim, "```$1");
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} else {
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mdText = gmiText.replace(/^```*(.*$)/gim, "```$1");
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}
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preformattedText = !preformattedText; //toggle!
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//END CODE BLOCK SECTION
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} else {
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//we are not on a line with pre/codeblock
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if (!preformattedText) {
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//outside of a codeblock
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mdText = gmiText
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.replace(
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/^=>\s+(\S+(.jpg|.jpeg|.png|.gif|.svg))\s*(.*)/gim,
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""
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) //for images, must be before links replacement below or else will be captured and converted
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.replace(/^\* (.*$)/gim, "* $1\n") //hack, would be better to add to ul list
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.replace(/^=>\s+(\S+)\s*(.*)/gim, "[$2]($1)\n") //close, need to remove gmi, add break
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.replace(".gmi", ".md"); //a hack. will break for remote *.gmi url's
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} else {
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//we are inside a pre/codeblock
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mdText = gmiText;
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}
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}
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return mdText;
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}
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