feat(lang): added lang support by url parameter

Author: StephanGerbeth

examples/example.js

@@ -1,14 +1,14 @@
 const fs = require('fs');
 const request = require('request-promise');
-const codeToSVG = require('../lib');
+const codeToSVG = require('../src/index');
 
 const url = 'https://raw.githubusercontent.com/GrabarzUndPartner/gp-vue-boilerplate/blob/master/src/store/index.js';
 const uri = url.replace(/([\w-]*\/[\w-]*)(\/blob)/, '$1');
 
 request({
   uri
 }).then((code) => {
-  const result = codeToSVG(code, 3, 7);
+  const result = codeToSVG(code, 3, 7, 'js');
   fs.writeFile('./test.svg', result, (err) => {
     if (err) {
       return console.log(err);

functions/index.js

@@ -14,17 +14,17 @@ function getMinMax(value = '1') {
   return value.split('-');
 }
 
-function getCodeAsSVG(path, range = '1') {
+function getCodeAsSVG(path, range = '1', lang = null) {
   const url = githubRawUrl + path;
   return request({ uri: url }).then((code) => {
     const [min, max] = getMinMax(range);
-    return codeToSVG(code, min, max);
+    return codeToSVG(code, min, max, lang);
   });
 }
 
 exports.test = functions.https.onRequest((req, res) => {
   const path = '/GrabarzUndPartner/gp-vue-boilerplate/master/src/components/molecules/LinkList.vue';
-  getCodeAsSVG(path, req.query.L).then((svg) => {
+  getCodeAsSVG(path, req.query.range, req.query.lang).then((svg) => {
     res.setHeader('Content-Type', 'image/svg+xml');
     res.setHeader('Cache-Control', 'no-cache');
     res.send(Buffer.from(svg));
@@ -33,7 +33,7 @@ exports.test = functions.https.onRequest((req, res) => {
 
 app.get(['/:foo/:bar/*'], (req, res) => {
   const path = req.path.replace(/([\w-]*\/[\w-]*)(\/blob)/, '$1');
-  getCodeAsSVG(path, req.query.L).then((svg) => {
+  getCodeAsSVG(path, req.query.range, req.query.lang).then((svg) => {
     res.setHeader('Content-Type', 'image/svg+xml');
     res.setHeader('Cache-Control', 'no-cache');
     res.send(Buffer.from(svg));

src/index.js

@@ -8,9 +8,18 @@ function extract(content, min = 1, max) {
     .join('\n');
 }
 
-function codeToSVG(code, min, max) {
+function highlightCode(code, lang) {
+  console.log(lang);
+  if (lang) {
+    return emphasize.highlight(lang, code);
+  }
+  return emphasize.highlightAuto(code);
+}
+
+function codeToSVG(code, min, max, lang) {
   const extractedCode = extract(code, min, max);
-  const highlightedCode = emphasize.highlightAuto(extractedCode);
+
+  const highlightedCode = highlightCode(extractedCode, lang);
   return ansiToSVG(highlightedCode.value);
 }