Added arn to the main repository

arn/Avatar.go

@@ -0,0 +1,42 @@
+package arn
+
+import (
+	"image"
+	"os"
+	"path"
+)
+
+// OriginalImageExtensions includes all the formats that an avatar source could have sent to us.
+var OriginalImageExtensions = []string{
+	".jpg",
+	".png",
+	".gif",
+}
+
+// LoadImage loads an image from the given path.
+func LoadImage(path string) (img image.Image, format string, err error) {
+	f, openErr := os.Open(path)
+
+	if openErr != nil {
+		return nil, "", openErr
+	}
+
+	img, format, decodeErr := image.Decode(f)
+
+	if decodeErr != nil {
+		return nil, "", decodeErr
+	}
+
+	return img, format, nil
+}
+
+// FindFileWithExtension tries to test different file extensions.
+func FindFileWithExtension(baseName string, dir string, extensions []string) string {
+	for _, ext := range extensions {
+		if _, err := os.Stat(path.Join(dir, baseName+ext)); !os.IsNotExist(err) {
+			return dir + baseName + ext
+		}
+	}
+
+	return ""
+}