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parser.js

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/**

* Fork https://github.com/egoist/docute/blob/master/src/utils/front-matter.js

*/

/* eslint-disable */

import parser from './yaml'

var optionalByteOrderMark = '\\ufeff?'

var pattern =

'^(' +

optionalByteOrderMark +

'(= yaml =|---)' +

'$([\\s\\S]*?)' +

'(?:\\2|\\.\\.\\.)' +

'$' +

'' +

'(?:\\n)?)'

// NOTE: If this pattern uses the 'g' flag the `regex` variable definition will

// need to be moved down into the functions that use it.

var regex = new RegExp(pattern, 'm')

function extractor(string) {

string = string || ''

var lines = string.split(/(\r?\n)/)

if (lines[0] && /= yaml =|---/.test(lines[0])) {

return parse(string)

} else {

return { attributes: {}, body: string }

}

}

function parse(string) {

var match = regex.exec(string)

if (!match) {

return {

attributes: {},

body: string

}

}

var yaml = match[match.length - 1].replace(/^\s+|\s+$/g, '')

var attributes = parser(yaml) || {}

var body = string.replace(match[0], '')

return { attributes: attributes, body: body, frontmatter: yaml }

}

function test(string) {

string = string || ''

return regex.test(string)

}

export default extractor