course-renderer/dist/tasks/summary-parser.js

Manages CA School Courses file system storage and HTML conversion

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const cheerio = require("cheerio");
const MarkdownIt = require("markdown-it");
const escapeHTML = require("escape-html");
const through = require('through2');
const replaceExtension = require('replace-ext');
module.exports = (options) => (through.obj((file, _, callback) => {
    if (file.isNull()) {
        callback(null, file);
        return;
    }
    if (file.isStream()) {
        callback(new Error('Streaming not supported'));
        return;
    }
    const md = new MarkdownIt();
    const ch = cheerio.load(md.render(file.contents.toString()));
    let output = new Array();
    traverseSummary(output, ch, ch('ul').first());
    file.contents = new Buffer(JSON.stringify(output, null, 4));
    file.path = replaceExtension(file.path, '.json');
    callback(null, file);
}));
function traverseSummary(output, ch, curEle) {
    curEle.children('li').each(function (index, element) {
        const childLI = ch(element);
        const link = childLI.find('a');
        const label = link.text();
        const url = link.attr('href').replace(/\.md$/, '.html');
        const desc = escapeHTML(childLI.children('blockquote').text().replace(/^\s+|\s+$/g, ''));
        const duration = childLI.find('strong').first().text();
        const summaryToken = {
            content: `[${label}](${url})`,
            text: label,
            url: url,
            description: desc,
            duration: duration,
            children: []
        };
        if (childLI.children('ul').length > 0) {
            summaryToken.children = traverseSummary([], ch, childLI.children('ul'));
        }
        output.push(summaryToken);
    });
    return output;
}