Merge pull request #56 from whitman/uptime

Add uptime.coffee

src/scripts/uptime.coffee

@@ -0,0 +1,37 @@
+# Outputs bot uptime
+
+module.exports = (robot) ->
+
+  start = new Date().getTime()
+
+  robot.respond /uptime/i, (msg) ->
+    uptimeMe msg, start, (uptime) ->
+      msg.send uptime
+
+numPlural = (num) ->
+  if num != 1 then 's' else ''
+
+uptimeMe = (msg, start, cb) ->
+  now = new Date().getTime()
+  uptime_seconds = Math.floor((now - start) / 1000)
+  intervals = {}
+  intervals.day = Math.floor(uptime_seconds / 86400)
+  intervals.hour = Math.floor((uptime_seconds % 86400) / 3600)
+  intervals.minute = Math.floor(((uptime_seconds % 86400) % 3600) / 60)
+  intervals.second = ((uptime_seconds % 86400) % 3600) % 60
+
+  elements = []
+  for own interval, value of intervals
+    if value > 0
+      elements.push value + ' ' + interval + numPlural(value)
+
+  last
+  if elements.length > 1
+    last = elements.pop()
+    response = elements.join ', '
+    response += ' and ' + last if last
+  else
+    response = elements.join ', '
+
+  cb 'I\'ve been sentient for ' + response
+