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miku/plugins/calc.lua

@@ -0,0 +1,39 @@
+local calc = {}
+
+local URL = require('socket.url')
+local http = require('socket.http')
+local utilities = require('miku.utilities')
+
+calc.command = 'calc <Ausdruck>'
+
+function calc:init(config)
+	calc.triggers = {
+	"^/calc (.*)$"
+	}
+	calc.doc = [[*
+]]..config.cmd_pat..[[calc* _[Ausdruck]_: Rechnet]]
+end
+
+function calc:mathjs(exp)
+  local exp = string.gsub(exp, ",", "%.")
+  local url = 'http://api.mathjs.org/v1/'
+  url = url..'?expr='..URL.escape(exp)
+  local b,c = http.request(url)
+  local text = nil
+  if c == 200 then
+    text = '= '..string.gsub(b, "%.", ",")
+  
+  elseif c == 400 then
+    text = b
+  else
+    text = 'Unerwarteter Fehler\n'
+      ..'Ist api.mathjs.org erreichbar?'
+  end
+  return text
+end
+
+function calc:action(msg, config, matches)
+  utilities.send_reply(self, msg, calc:mathjs(matches[1]))
+end
+
+return calc