WIP - add extractor, generate snippet_data

node_modules/front-matter/index.js

@@ -0,0 +1,51 @@
+var parser = require('js-yaml')
+var optionalByteOrderMark = '\\ufeff?'
+var platform = typeof process !== 'undefined' ? process.platform : ''
+var pattern = '^(' +
+  optionalByteOrderMark +
+  '(= yaml =|---)' +
+  '$([\\s\\S]*?)' +
+  '^(?:\\2|\\.\\.\\.)\\s*' +
+  '$' +
+  (platform === 'win32' ? '\\r?' : '') +
+  '(?:\\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')
+
+module.exports = extractor
+module.exports.test = test
+
+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.load(yaml) || {}
+  var body = string.replace(match[0], '')
+
+  return { attributes: attributes, body: body, frontmatter: yaml }
+}
+
+function test (string) {
+  string = string || ''
+
+  return regex.test(string)
+}