121 lines
3.8 KiB
JavaScript
121 lines
3.8 KiB
JavaScript
"use strict";
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const path = require("path");
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const fs = require("mz/fs");
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const throat = require("throat");
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const jsdom = require("./jsdom.js");
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module.exports = function (cachePath, contentPath) {
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return getChapterFilePaths(cachePath)
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.then(function (chapterFilePaths) {
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console.log("All chapters downloaded; beginning conversion to EPUB chapters");
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const mapper = throat(10, function (filePath) {
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return convertChapter(filePath, contentPath);
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});
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return Promise.all(chapterFilePaths.map(mapper));
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})
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.then(function () {
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console.log("All chapters converted");
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});
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};
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function getChapterFilePaths(cachePath) {
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return fs.readdir(cachePath).then(function (filenames) {
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return filenames.filter(function (f) { return f.endsWith(".html"); })
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.map(function (f) { return path.resolve(cachePath, f); });
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});
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}
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function convertChapter(filePath, contentPath) {
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const filename = path.basename(filePath);
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console.log(`- Reading ${filename}`);
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return fs.readFile(filePath, { encoding: "utf-8" }).then(function (contents) {
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console.log(`- Read ${filename}`);
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const rawChapterDoc = jsdom(contents);
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const output = getChapterString(rawChapterDoc);
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// TODO: this should probably not be necessary... jsdom bug I guess!?
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rawChapterDoc.defaultView.close();
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const destFileName = `${path.basename(filename, ".html")}.xhtml`;
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const destFilePath = path.resolve(contentPath, destFileName);
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return fs.writeFile(destFilePath, output);
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})
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.then(function () {
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console.log(`- Finished converting ${filename}`);
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});
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}
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function getChapterString(rawChapterDoc) {
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const title = rawChapterDoc.querySelector("h1.entry-title").textContent;
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const body = cleanContentEl(rawChapterDoc.querySelector(".entry-content"));
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return `<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" />
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<title>${title}</title>
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</head>
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<body>
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<h1>${title}</h1>
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${body}
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</body>
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</html>`;
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}
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function cleanContentEl(el) {
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// Remove initial Next Chapter and Previous Chapter <p>
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el.removeChild(el.firstElementChild);
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// Remove everything after the last <p> (e.g. analytics <div>s)
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const lastP = el.querySelector("p:last-of-type");
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while (el.lastElementChild !== lastP) {
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el.removeChild(el.lastElementChild);
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}
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// Remove empty <p>s or Last Chapter/Next Chapter <p>s
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while (isEmptyOrGarbage(el.lastElementChild)) {
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el.removeChild(el.lastElementChild);
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}
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// Remove redundant dir="ltr" and align="LEFT" and style="text-align: left;"
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Array.prototype.forEach.call(el.children, function (child) {
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if (child.getAttribute("dir") === "ltr") {
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child.removeAttribute("dir");
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}
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if ((child.getAttribute("align") || "").toLowerCase() === "left") {
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child.removeAttribute("align");
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}
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if (child.getAttribute("style") === "text-align:left;") {
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child.removeAttribute("style");
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}
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});
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// Remove empty <em>s and <i>s
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const ems = el.querySelectorAll("em, i");
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Array.prototype.forEach.call(ems, function (em) {
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if (em.textContent.trim() === "") {
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em.parentNode.removeChild(em);
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}
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});
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let html = el.innerHTML;
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// Fix recurring strange pattern of extra <br> in <p>...<em>...<br>\n</em></p>
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html = html.replace(/<br>\s*<\/em><\/p>/g, '</em></p>');
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// One-off fixes
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html = html.replace(/truck reached<br>\nthe other Nine/, 'truck reached the other Nine');
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return html;
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}
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function isEmptyOrGarbage(el) {
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const text = el.textContent.trim();
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return text === "" || text.startsWith("Last Chapter") || text.startsWith("Next Chapter");
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}
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