Merge pull request #10 from mrvdb/btc

Bitcoin exchange rate plugin

plugins/btc.lua

@@ -0,0 +1,50 @@
+
+function getBTCX(amount,currency)
+   -- Do request on bitcoinaverage, the final / is critical!
+   local res,code  = https.request("https://api.bitcoinaverage.com/ticker/global/"..currency.."/")
+   
+   if code~= 200 then return nil end
+   local data = json:decode(res)
+
+   -- Easy, it's right there
+   text = "BTC/"..currency..'\n'..'Buy: '..data.ask..'\n'..'Sell: '..data.bid
+   
+   -- If we have a number as second parameter, calculate the bitcoin amount
+   if amount~=nil then
+      btc = tonumber(amount) / tonumber(data.ask)
+      text = text.."\n "..currency .." "..amount.." = BTC "..btc
+   end
+   return text
+end
+
+function run(msg, matches)
+   vardump(matches)
+   local cur = 'EUR'
+   local amt = nil
+   -- Get the global match out of the way
+   if matches[1] == "!btc" then  return getBTCX(amt,cur) end
+
+   if matches[2]~=nil then
+      -- There is a second match
+      amt = matches[2]
+      cur = string.upper(matches[1])
+   else
+      -- Just a EUR or USD param
+      cur = string.upper(matches[1])
+   end
+   return getBTCX(amt,cur)
+end
+
+return {
+   description = "Bitcoin global average market value (in EUR or USD)", 
+   usage = "!btc [EUR|USD] [amount]",
+   patterns = {
+      "^!btc$",
+      "^!btc ([Ee][Uu][Rr])$",
+      "^!btc ([Uu][Ss][Dd])$",
+      "^!btc (EUR) (%d+[%d%.]*)$",
+      "^!btc (USD) (%d+[%d%.]*)$"
+   }, 
+   run = run 
+}
+