Mikubot/plugins/location.lua

-- Implement a command /loc [area] which uses
-- the static map API to get a location image

-- Not sure if this is the proper way
-- Intent: get_latlong is in time.lua, we need it here
-- loadfile "time.lua"

-- Globals
-- If you have a google api key for the geocoding/timezone api
do
require("./plugins/time")

local api_key = nil
local base_api = "https://maps.googleapis.com/maps/api"

function get_staticmap(area)
   local api        = base_api .. "/staticmap?"

   -- Get a sense of scale
   local lat,lng,acc,types = get_latlong(area)
   
   local scale = types[1]
   if     scale=="locality" then zoom=8
   elseif scale=="country"  then zoom=4
   else zoom = 13 end
      
   local parameters =
      "size=600x300" ..
      "&zoom="  .. zoom ..
      "&center=" .. URL.escape(area) ..
      "&markers=color:red"..URL.escape("|"..area)
   
   if api_key ~=nil and api_key ~= "" then
      parameters = parameters .. "&key="..api_key
   end
   return lat, lng, api..parameters
end


function run(msg, matches)
   local receiver	= get_receiver(msg)
   local lat,lng,url	= get_staticmap(matches[1])
   
   -- Send the actual location, is a google maps link
   send_location(receiver, lat, lng, ok_cb, false)
  
   -- Send a picture of the map, which takes scale into account
   send_photo_from_url(receiver, url)
   
  -- Return a link to the google maps stuff is now not needed anymore
   return nil
end

return {
  description = "Zeigt Informationen über einen Ort.",
  usage = "#loc (Ort)",
  patterns = {"^#loc (.*)$"}, 
  run = run 
}

end