homebrewery/shared/helpers.js

const _ = require('lodash');
const yaml = require('js-yaml');

const splitTextStyleAndMetadata = (brew)=>{
	brew.text = brew.text.replaceAll('\r\n', '\n');
	if(brew.text.startsWith('```metadata')) {
		const index = brew.text.indexOf('```\n\n');
		const metadataSection = brew.text.slice(12, index - 1);
		const metadata = yaml.load(metadataSection);
		Object.assign(brew, _.pick(metadata, ['title', 'description', 'tags', 'systems', 'renderer', 'theme', 'lang']));
		brew.text = brew.text.slice(index + 5);
	}
	if(brew.text.startsWith('```css')) {
		const index = brew.text.indexOf('```\n\n');
		brew.style = brew.text.slice(7, index - 1);
		brew.text = brew.text.slice(index + 5);
	}
};

const printPage = ()=>{
	if (window.typeof !== 'undefined') {
		window.frames['BrewRenderer'].contentWindow.print();
		//Force DOM reflow; Print dialog causes a repaint, and @media print CSS somehow makes out-of-view pages disappear
		let node = window.frames['BrewRenderer'].contentDocument.getElementsByClassName('brewRenderer').item(0);
		node.style.display='none';
		node.offsetHeight; // accessing this is enough to trigger a reflow
		node.style.display='';
	}
};

module.exports = {
	splitTextStyleAndMetadata,
	printPage
};