Direct avatar rendering (#13649)

* Direct avatar rendering

This adds new template helpers for avatar rendering which output image
elements with direct links to avatars which makes them cacheable by the
browsers.

This should be a major performance improvment for pages with many avatars.

* fix avatars of other user's profile pages

* fix top border on user avatar name

* uncircle avatars

* remove old incomplete avatar selector

* use title attribute for name and add it back on blame

* minor refactor

* tweak comments

* fix url path join and adjust test to new result

* dedupe functions

1 files changed, 52 insertions, 0 deletions

diff --git a/models/avatar_test.go b/models/avatar_test.go
new file mode 100644
index 0000000000..89540705a0
--- /dev/null
+++ b/models/avatar_test.go
@@ -0,0 +1,52 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"net/url"
+	"testing"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
+)
+
+const gravatarSource = "https://secure.gravatar.com/avatar/"
+
+func disableGravatar() {
+	setting.EnableFederatedAvatar = false
+	setting.LibravatarService = nil
+	setting.DisableGravatar = true
+}
+
+func enableGravatar(t *testing.T) {
+	setting.DisableGravatar = false
+	var err error
+	setting.GravatarSourceURL, err = url.Parse(gravatarSource)
+	assert.NoError(t, err)
+}
+
+func TestHashEmail(t *testing.T) {
+	assert.Equal(t,
+		"d41d8cd98f00b204e9800998ecf8427e",
+		HashEmail(""),
+	)
+	assert.Equal(t,
+		"353cbad9b58e69c96154ad99f92bedc7",
+		HashEmail("gitea@example.com"),
+	)
+}
+
+func TestSizedAvatarLink(t *testing.T) {
+	disableGravatar()
+	assert.Equal(t, "/suburl/img/avatar_default.png",
+		SizedAvatarLink("gitea@example.com", 100))
+
+	enableGravatar(t)
+	assert.Equal(t,
+		"https://secure.gravatar.com/avatar/353cbad9b58e69c96154ad99f92bedc7?d=identicon&s=100",
+		SizedAvatarLink("gitea@example.com", 100),
+	)
+}