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--- livebox:twitter [2012/03/17 17:03] – [xAP Twitter] Diagram showing processing of Twitter command. karl
+++ livebox:twitter [2012/05/29 10:55] – [alias interpreter] brett
@@ Line 32: / Line 32: @@
 </code>
-The commands you enter resolve the same way as the Google Calendar component (//See [[hah#calendar_aliases]]//) and require an [[hah_plugboard#alias_interpreter]] to resolve these into appropriate actions.  The diagram below shows the entire process.
+The commands you enter resolve the same way as the Google Calendar component (//See [[google_calendar#calendar_aliases]]//) and require an [[#alias_interpreter]] to resolve these into appropriate actions.  The diagram below shows the entire process.
 {{:livebox:twitter_xap_process_v3.png|}}
@@ Line 63: / Line 63: @@
 text=Hello World
 }
+</code>
+===== alias interpreter =====
+An alias engine is supplied on the HAH as a sample to install this
+<code>
+# cp /etc_ro_fs/plugboard/samples/aliasApplet.lua /etc/plugboard
+</code>
+This is how the default alias engine looks - You'll want to edit this as you add twitter and google calender command shortcuts.
+<code lua>
+--[[
+Alias interpreter
+Use to perform actions based on xAP alias class messages emitted by
+both xap-twitter and xap-googlecal
+--]]
+module(...,package.seeall)
+require("xap")
+require("xap.bsc")
+require("string")
+rex = require("rex_posix")
+info={
+   version="1.1", description="Alias Interpreter"
+}
+pat={
+    [rex.new("(relay) ([1-4]) (on|off)")]=function(m) rfRelayCmd(m) end,
+    [rex.new("(rf) ([0-9]+) (on|off)")]=function(m) rfRelayCmd(m) end,
+    [rex.new("tweet (.*)")]=function(m) tweet(m) end,
+    "reboot" = function() os.execute("reboot") end
+}
+function tweet(m)
+  local msg = unpack(m)
+  bsc.sendText("dbzoo.livebox.Twitter",msg)
+end
+function rfRelayCmd(t)
+  local addr1,addr2,state = unpack(t)
+  bsc.sendState(string.format("dbzoo.livebox.Controller:%s.%s",addr1,addr2),state)
+end
+function aliasEngine(frame)
+  local alias = frame:getValue("command","text")
+  for r,f in pairs(pat) do
+      if type(r) == "string" then
+         if r == alias then
+            f()
+         end
+      else
+        p={r:match(alias)}
+        if #p > 0 then
+            f(p)
+        end
+      end
+  end
+end
+function init()
+  local f = xap.Filter()
+  f:add("xap-header","class","alias")
+  f:add("command","text",xap.FILTER_ANY)
+  f:callback(aliasEngine)
+end
 </code>