log js errors

oml/api.py

@@ -13,6 +13,8 @@ import item.api
 import user.api
 import update
 
+import logging
+logger = logging.getLogger(__name__)
 
 def selectFolder(data):
     '''
@@ -88,3 +90,14 @@ def quit(data):
     state.main.stop()
     return {}
 actions.register(quit, cache=False)
+
+def logError(data):
+    '''
+        takes {
+        }
+        returns {
+        }
+    '''
+    #logger.debug('frontend error %s', data)
+    return {}
+actions.register(logError, cache=False)

static/js/oml.js

@@ -1,6 +1,20 @@
 'use strict';
 
 (function() {
+    window.onerror = function(error, url, line, column, errorObj) {
+        if (error == 'TypeError: Attempted to assign to readonly property.') {
+            return;
+        }
+        try {
+            var stack = (errorObj && errorObj.stack) || "(no stack trace available)";
+
+            !/^resource:/.test(url) && oml.api.logError({
+                text: error + "\n\n" + stack,
+                url: document.location.pathname + ' at ' + url,
+                line: line
+            });
+        } catch(e) {}
+    };
 
     var animationInterval,
         enableDebugMode = getLocalStorage('oml.enableDebugMode'),