Fix language mime type lookup (#712)

* add editorconfig to keep files consistent automatically

* lookup language mime type in languages dictionary

* use language maps instead of language list

* Revert "add editorconfig to keep files consistent automatically"

This reverts commit 3cfdd4a5444791e763ffae59fde199406677f82f.

* move location of toLowerCase()

components/Carbon.js

@@ -11,6 +11,7 @@ import {
   COLORS,
   LANGUAGE_MODE_HASH,
   LANGUAGE_NAME_HASH,
+  LANGUAGE_MIME_HASH,
   THEMES_HASH,
   DEFAULT_SETTINGS
 } from '../lib/constants'
@@ -19,6 +20,14 @@ const Watermark = dynamic(() => import('./svg/Watermark'), {
   loading: () => null
 })
 
+function searchLanguage(l) {
+  const config = LANGUAGE_NAME_HASH[l] || LANGUAGE_MODE_HASH[l] || LANGUAGE_MIME_HASH[l]
+
+  if (config) {
+    return config.mime || config.mode
+  }
+}
+
 class Carbon extends React.PureComponent {
   static defaultProps = {
     onAspectRatioChange: () => {},
@@ -43,14 +52,19 @@ class Carbon extends React.PureComponent {
       if (language === 'auto') {
         // try to set the language
         const detectedLanguage = hljs.highlightAuto(newCode).language
-        const languageMode =
-          LANGUAGE_MODE_HASH[detectedLanguage] || LANGUAGE_NAME_HASH[detectedLanguage]
+        const languageMode = searchLanguage(detectedLanguage)
 
         if (languageMode) {
-          return languageMode.mime || languageMode.mode
+          return languageMode
         }
       }
 
+      const languageMode = searchLanguage(language)
+
+      if (languageMode) {
+        return languageMode
+      }
+
       return language
     },
     ms('300ms'),
@@ -69,7 +83,10 @@ class Carbon extends React.PureComponent {
   render() {
     const config = { ...DEFAULT_SETTINGS, ...this.props.config }
 
-    const languageMode = this.handleLanguageChange(this.props.children, config.language)
+    const languageMode = this.handleLanguageChange(
+      this.props.children,
+      config.language && config.language.toLowerCase()
+    )
 
     const options = {
       lineNumbers: config.lineNumbers,