From 1e531bd31047ccf7225dc8cca7f553a0cf66df23 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paulius=20Maru=C5=A1ka?= <paulius.maruska@gmail.com>
Date: Fri, 10 Oct 2014 21:35:26 +0300
Subject: [PATCH] Fixes #44, crash when no handlers

Recent database handler changes made the library crash, when feed
object is created without channel, item handlers (passing nils).
These simple changes seem to fix the problem and the library works
again.
---
 feed.go      | 8 ++++++--
 feed_test.go | 9 +++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/feed.go b/feed.go
index 4348e47..51563d8 100644
--- a/feed.go
+++ b/feed.go
@@ -46,13 +46,17 @@ func (err *UnsupportedFeedError) Error() string {
 type ChannelHandlerFunc func(f *Feed, newchannels []*Channel)
 
 func (h ChannelHandlerFunc) ProcessChannels(f *Feed, newchannels []*Channel) {
-	h(f, newchannels)
+	if h != nil {
+		h(f, newchannels)
+	}
 }
 
 type ItemHandlerFunc func(f *Feed, ch *Channel, newitems []*Item)
 
 func (h ItemHandlerFunc) ProcessItems(f *Feed, ch *Channel, newitems []*Item) {
-	h(f, ch, newitems)
+	if h != nil {
+		h(f, ch, newitems)
+	}
 }
 
 type Handler interface {
diff --git a/feed_test.go b/feed_test.go
index 950d8d1..d456b8c 100644
--- a/feed_test.go
+++ b/feed_test.go
@@ -29,6 +29,15 @@ func TestFeed(t *testing.T) {
 	}
 }
 
+func Test_NoHandlers(t *testing.T) {
+	feed := New(1, true, nil, nil)
+	content, _ := ioutil.ReadFile("testdata/initial.atom")
+	err := feed.FetchBytes("http://example.com", content, nil)
+	if err != nil {
+		t.Error(err)
+	}
+}
+
 func Test_NewItem(t *testing.T) {
 	content, _ := ioutil.ReadFile("testdata/initial.atom")
 	feed := New(1, true, chanHandler, itemHandler)