add export size and square image support to safari

api/handlers/image.js

@@ -1,11 +1,11 @@
 /* global domtoimage */
-const ARBITRARY_WAIT_TIME = 500
+const ARBITRARY_WAIT_TIME = 250
 
 module.exports = browser => async (req, res) => {
   const page = await browser.newPage()
   const { state } = req.body
 
-  if (!state) res.status(400).send()
+  if (!state) res.status(400).send('Invalid Request')
 
   try {
     const path = require.resolve('dom-to-image')
@@ -19,34 +19,47 @@ module.exports = browser => async (req, res) => {
     const targetElement = await page.$('.export-container')
 
     const dataUrl = await page.evaluate((target = document) => {
+      const query = new URLSearchParams(document.location.search.slice(1))
+
+      const EXPORT_SIZES_HASH = {
+        '1x': '1',
+        '2x': '2',
+        '4x': '4'
+      }
+
+      const exportSize = EXPORT_SIZES_HASH[query.get('es')] || '2'
+
+      target.querySelectorAll('span[role="presentation"]').forEach(node => {
+        if (node.innerText && node.innerText.match(/%\S\S/)) {
+          node.innerText = encodeURIComponent(node.innerText)
+        }
+      })
+
+      const width = target.offsetWidth * exportSize
+      const height = query.get('si')
+        ? target.offsetWidth * exportSize
+        : target.offsetHeight * exportSize
+
       const config = {
         style: {
-          transform: 'scale(2)',
+          transform: `scale(${exportSize})`,
-          'transform-origin': 'center'
+          'transform-origin': 'center',
+          background: query.get('si') ? query.get('bg') : 'none'
         },
         filter: n => {
-          // %[00 -> 19] cause failures
-          if (
-            n.innerText &&
-            n.innerText.match(/%\d\S/) &&
-            n.className &&
-            n.className.startsWith('cm-') // is CodeMirror primitive string
-          ) {
-            n.innerText = encodeURIComponent(n.innerText)
-          }
           if (n.className) {
             return String(n.className).indexOf('eliminateOnRender') < 0
           }
           return true
         },
-        width: target.offsetWidth * 2,
+        width,
-        height: target.offsetHeight * 2
+        height
       }
 
       return domtoimage.toPng(target, config)
     }, targetElement)
 
-    res.status(200).json({ dataUrl })
+    res.status(200).send(dataUrl)
   } catch (e) {
     // eslint-disable-next-line
     console.error(e)

api/now.json

@@ -3,6 +3,7 @@
   "alias": "carbon-api.now.sh",
   "type": "docker",
   "public": true,
+  "version": 1,
   "env": {
     "NODE_ENV": "production",
     "TWITTER_CONSUMER_KEY": "@twitter-consumer-key",

lib/api.js

@@ -34,7 +34,7 @@ async function tweet(content, encodedImage) {
 }
 
 function image(state) {
-  return client.post('/image', { state }).then(res => res.data.dataUrl)
+  return client.post('/image', { state }).then(res => res.data)
 }
 
 function getGist(uid) {