From aeac228df7121dada4827ac248e61ba8b1db7318 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sat, 5 Dec 2015 17:58:41 +0100
Subject: [PATCH] Taler amount parsing.

---
 extension/lib/util.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/extension/lib/util.js b/extension/lib/util.js
index 9d83f7e74..d364d9593 100644
--- a/extension/lib/util.js
+++ b/extension/lib/util.js
@@ -15,6 +15,27 @@ function amount_format (amount)
 }
 
 
+/**
+ * Parse an amount that is specified like '5.42 EUR'.
+ * Returns a {currency,value,fraction} object or null
+ * if the input is invalid.
+ */
+function amount_parse_pretty(s) {
+  let pattern = /(\d+)(.\d+)?\s*([a-zA-Z]+)/;
+  let matches = pattern.exec(s);
+  if (null == matches) {
+    return null;
+  }
+  return {
+    // Always succeeds due to regex
+    value: parseInt(matches[1]),
+    // Should we warn / fail on lost precision?
+    fraction: Math.round(parseFloat(matches[2] || 0) * 1000000),
+    currency: matches[3],
+  };
+}
+
+
 /**
  * Format amount with currency as String.
  *