[zshrc] add timer function

home/.zshrc.local

@@ -151,6 +151,35 @@ function ränder() {
 	)
 }
 
+## Timer
+function timer() {
+	(
+        if [ -z "$1" ] || [ -z "$2" ]; then
+            echo "USAGE: $0 [u|f] TIME/DURATION" >&2
+            return 1
+        fi
+
+        if [ "$1" != "u" ] && [ "$1" != "f" ]; then
+            echo "Invalid mode “$1” supplied. Valid modes are: u|f" >&2
+            return 2
+        fi
+
+        [ "$1" = "u" ] && mode="until"
+        [ "$1" = "f" ] && mode="for"
+
+        gosleep --${mode} "$2"
+
+        if [ "$?" = 0 ]; then
+            echo "Press CTRL-C to stop the alarm…" >&2
+            echo -en "\a" # highlight window
+            play -q ~/Dokumente/sound/ringtones/commando.ogg
+        else
+            echo "The sleep command failed. Please check the options." >&2
+            return 3
+        fi
+    )
+}
+
 # Bugs
 
 ## silversearcher-ag and not apt-get