Add glossary feature

digest/glossary.js

@@ -1,9 +1,11 @@
+const marked = require('marked')
 const utils = require('./utils')
 
 module.exports = () =>
   utils.readdir('/glossary')
     .then(convertGlossaryFileNamesToTerms)
     .then(loadTermValues)
+    .then(loadTermDefinitions)
     .then(utils.indexById)
 
 const convertGlossaryFileNamesToTerms = glossaryFileName =>
@@ -21,8 +23,49 @@ const loadTermValues = terms =>
       utils.readMarkdownFile(`/glossary/${term.id}/README.md`)
         .then(document => {
           const heading = document.find( token => token.type === 'heading' && token.depth === 1 )
-          if (heading) term.value = heading.text
+          if (heading)
+            term.value = heading.text
           return term
         })
     )
   )
+
+const loadTermDefinitions = terms =>
+  Promise.all(
+    terms.map(term =>
+      utils.readMarkdownFile(`/glossary/${term.id}/README.md`)
+        .then(document => {
+
+          const [definitionText, definitionHTML] = getDefinition(document)
+
+          term.definitionText = definitionText
+          term.definitionHTML = definitionHTML
+
+          return term
+        })
+    )
+  )
+
+const getDefinition = document => {
+  const definitionTextNode = []
+  const link = document.links
+  definitionTextNode.links = link
+
+  let moveToNext = true
+
+  document.forEach(token => {
+    if (token.type === 'heading' && token.text === 'References') moveToNext = false
+    if (token.type === 'heading' && token.depth === 1) return
+    if (token.type === 'heading' && token.text === 'Definition') return
+    if (moveToNext)
+      definitionTextNode.push(token)
+  })
+
+  const definitionText = []
+  definitionTextNode.forEach(textNode => {
+    if (!textNode.links)
+      definitionText.push(textNode.text)
+  })
+
+  return [definitionText.join(' '), marked.parser(definitionTextNode)]
+}