main: refactor a bit to get logic out of main and into ./cmd/

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

cmd/emoji.go

@@ -0,0 +1,21 @@
+package cmd
+
+import (
+	esum "github.com/emojisum/emojisum/emoji"
+)
+
+// EmojiFromBytes parses the bytes buffer for colon notation and returns the
+// corresponding emoji
+func EmojiFromBytes(buf []byte) string {
+	var ret string
+	for _, b := range buf {
+		for _, e := range esum.Map(b) {
+			// use the first colon notation word and continue
+			if esum.IsColonNotation(e) {
+				ret = ret + e
+				break
+			}
+		}
+	}
+	return ret
+}