From d6202e522b7875546bfcd6ed000a72d1910fade4 Mon Sep 17 00:00:00 2001
From: Johan Preynat <johan.preynat@gmail.com>
Date: Tue, 3 May 2016 11:27:05 +0200
Subject: [PATCH] lib/utils/images.js: Add convertInlinePNG() method

---
 lib/utils/images.js | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/lib/utils/images.js b/lib/utils/images.js
index e387d6b36..6d4b927ad 100644
--- a/lib/utils/images.js
+++ b/lib/utils/images.js
@@ -38,7 +38,23 @@ function convertSVGBufferToPNG(buf, dest) {
     });
 }
 
+// Converts a inline data: to png file
+function convertInlinePNG(source, dest) {
+    if (!/^data\:image\/png/.test(source)) return Promise.reject(new Error('Source is not a PNG data-uri'));
+
+    var base64data = source.split('data:image/png;base64,')[1];
+    var buf = new Buffer(base64data, 'base64');
+
+    return fs.writeFile(dest, buf)
+    .then(function() {
+        if (fs.existsSync(dest)) return;
+
+        throw new Error('Error converting '+source+' into '+dest);
+    });
+}
+
 module.exports = {
     convertSVGToPNG: convertSVGToPNG,
-    convertSVGBufferToPNG: convertSVGBufferToPNG
+    convertSVGBufferToPNG: convertSVGBufferToPNG,
+    convertInlinePNG: convertInlinePNG
 };
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