Improved avatar background job

jobs/avatars/Gravatar.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+
+	"github.com/animenotifier/arn"
+	"github.com/parnurzeal/gorequest"
+	gravatar "github.com/ungerik/go-gravatar"
+)
+
+// Gravatar - https://gravatar.com/
+type Gravatar struct{}
+
+// GetAvatar returns the Gravatar image for a user (if available).
+func (source *Gravatar) GetAvatar(user *arn.User) *Avatar {
+	// If the user has no Email registered we can't get a Gravatar.
+	if user.Email == "" {
+		return nil
+	}
+
+	// Build URL
+	gravatarURL := gravatar.Url(user.Email) + "?s=" + fmt.Sprint(arn.AvatarMaxSize) + "&d=404&r=pg"
+
+	// Download
+	response, data, networkErr := gorequest.New().Get(gravatarURL).EndBytes()
+
+	if networkErr != nil || response.StatusCode != 200 {
+		return nil
+	}
+
+	// Decode
+	img, format, decodeErr := image.Decode(bytes.NewReader(data))
+
+	if decodeErr != nil {
+		return nil
+	}
+
+	return &Avatar{
+		Image:  img,
+		Data:   data,
+		Format: format,
+	}
+}