114 lines
2.8 KiB
JavaScript
114 lines
2.8 KiB
JavaScript
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const { pick } = require('lodash');
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const yaml = require('js-yaml');
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const frontmatterProperties = [
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'id',
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'title',
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'challengeType',
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'videoId',
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'videoUrl',
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'forumTopicId',
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'isPrivate',
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'required',
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'helpCategory'
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];
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const otherProperties = [
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'description',
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'instructions',
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'tests',
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'solutions',
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'files',
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'question'
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];
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const notranslateStart = '<notranslate>';
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const notranslateEnd = '</notranslate>';
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function createFrontmatter(data) {
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Object.keys(data).forEach(key => {
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if (!frontmatterProperties.includes(key) && !otherProperties.includes(key))
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throw Error(`Unknown property '${key}'`);
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});
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// TODO: sort the keys? It doesn't matter from a machine perspective, but
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// it does from human-readability one. We could get lucky and have the order
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// be preserved accidentally.
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const frontData = pick(data, frontmatterProperties);
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const frontYAML = yaml.dump(frontData);
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return `---
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${frontYAML}---
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`;
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}
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// NOTE: trimEnd is used since trailing whitespace is rarely used (it can create
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// a <br>, but that's uncommon and hard to read)
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function createHints({ tests }) {
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if (!tests) return '';
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const strTests = tests
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.map(
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({ text, testString }) => `${text.trimEnd()}
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${notranslateStart}
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${testString.trimEnd()}
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${notranslateEnd}
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`
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)
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.join('\n');
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return createSection('hints', strTests);
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}
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function createQuestion({ question }) {
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if (!question) return '';
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const { text, answers, solution } = question;
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const formattedAnswers = answers.map(
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answer => `${notranslateStart}
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${answer.trimEnd()}
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${notranslateEnd}
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`
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).join(`
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---
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`);
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const formattedQuestion =
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createSection('text', text, { depth: 2 }) +
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createSection('answers', formattedAnswers, { depth: 2 }) +
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createSection('video-solution', solution, { depth: 2, translate: false });
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return createSection('question', formattedQuestion);
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}
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function createInstructions({ instructions }) {
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return createSection('instructions', instructions);
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}
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function createDescription({ description }) {
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return createSection('description', description);
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}
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function createSection(heading, contents, options) {
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const { depth = 1, translate = true } = options || {};
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return contents && contents.toString().trim()
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? `${notranslateStart}
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${''.padEnd(depth, '#')} --${heading}--
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${translate ? notranslateEnd + '\n' : ''}
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${contents.toString().trimEnd()}
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${translate ? '' : notranslateEnd + '\n'}
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`
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: '';
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}
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function challengeToString(data) {
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const chalString =
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createFrontmatter(data) +
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createDescription(data) +
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createInstructions(data) +
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createQuestion(data) +
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createHints(data);
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// all sections have a trailing '\n', the last one of which needs removing
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return chalString.slice(0, -1);
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}
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exports.challengeToString = challengeToString;
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