Fix to save/load history

stackbrew/lib/utils.py

@@ -11,13 +11,27 @@ def resp(app, data=None, code=200, headers=None):
 
 
 def save_history(history, target='/opt/stackbrew/history.json'):
-	with open(target, 'w') as f:
-		f.write(json.dumps(history))
+    save = []
+    for k in history.iterkeys():
+        url, ref, dfile = k # unpack
+        save.append({
+            'url': url,
+            'ref': ref,
+            'dfile': dfile,
+            'img': history[k]
+        })
+
+    with open(target, 'w') as f:
+        f.write(json.dumps(save))
 
 
 def load_history(target='/opt/stackbrew/history.json'):
-	try:
-		with open(target, 'r') as f:
-			return json.loads(f.read())
-	except IOError:
-		return {}
+    history = {}
+    try:
+        with open(target, 'r') as f:
+            savefile = json.loads(f.read())
+            for item in savefile:
+                history[(item['url'], item['ref'], item['dfile'])] = item['img']
+            return history
+    except IOError:
+        return {}