Convert between YAML and JSON and vice versa

yamlize.js

const utils = require ("daveutils");
const yaml = require ("js-yaml");

function yamlIze (jsontext) {
	var jstruct = JSON.parse (jsontext);
	const delimiter = "---\n";
	var text = jstruct.text;
	delete jstruct.text;
	var s = delimiter + yaml.safeDump (jstruct) + delimiter + text;
	return (s);
	}
  
function deYamlIze (data) {
	const delimiter = "---\n";
	var filetext = data.toString ();
	if (utils.beginsWith (filetext, delimiter)) {
		var frontmatter = utils.stringNthField (filetext, delimiter, 2);
		var remainingtext = utils.stringDelete (filetext, 1, frontmatter.length + (2 * delimiter.length));
		if (frontmatter.length > 0) {
			var jstruct = yaml.safeLoad (frontmatter);
			jstruct.text = remainingtext;
			return (utils.jsonStringify (jstruct));
			}
		return (filetext);
		}
	return (filetext);
	}