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Mikubot/plugins/time.lua
2014-11-22 11:59:34 +01:00

99 lines
2.8 KiB
Lua

-- Implement a command !time [area] which uses
-- 2 Google APIs to get the desired result:
-- 1. Geocoding to get from area to a lat/long pair
-- 2. Timezone to get the local time in that lat/long location
-- Globals
-- If you have a google api key for the geocoding/timezone api
api_key = config.time.api_key or nil
base_api = "https://maps.googleapis.com/maps/api"
dateFormat = "%A %d %B - %H:%M:%S"
-- Need the utc time for the google api
function utctime()
return os.time(os.date("!*t"))
end
-- Use the geocoding api to get the lattitude and longitude with accuracy specifier
-- CHECKME: this seems to work without a key??
function get_latlong(area)
local api = base_api .. "/geocode/json?"
local parameters = "address=".. (URL.escape(area) or "")
if api_key ~=nil then
parameters = parameters .. "&key="..api_key
end
-- Do the request
local res, code = https.request(api..parameters)
if code ~=200 then return nil end
local data = json:decode(res)
if (data.status == "ZERO_RESULTS") then
return nil
end
if (data.status == "OK") then
-- Get the data
lat = data.results[1].geometry.location.lat
lng = data.results[1].geometry.location.lng
acc = data.results[1].geometry.location_type
return lat,lng,acc
end
end
-- Use timezone api to get the time in the lat,
-- Note: this needs an API key
function get_time(lat,lng)
local api = base_api .. "/timezone/json?"
-- Get a timestamp (server time is relevant here)
local timestamp = utctime()
local parameters = "location=" ..
URL.escape(lat) .. "," ..
URL.escape(lng) ..
"&timestamp="..URL.escape(timestamp)
if api_key ~=nil then
parameters = parameters .. "&key="..api_key
end
local res,code = https.request(api..parameters)
if code ~= 200 then return nil end
local data = json:decode(res)
if (data.status == "ZERO_RESULTS") then
return nil
end
if (data.status == "OK") then
-- Construct what we want
-- The local time in the location is:
-- timestamp + rawOffset + dstOffset
local localTime = timestamp + data.rawOffset + data.dstOffset
return localTime
end
return localTime
end
function getformattedLocalTime(area)
if area == nil then
return "The time in nowhere is never"
end
lat,lng,acc = get_latlong(area)
if lat == nil and lng==nil then
return "It seems that in '"..area.."' they do not have a concept of time."
end
local localTime = get_time(lat,lng)
return "The local time in '"..area.."' is: ".. os.date(dateFormat,localTime)
end
function run(msg, matches)
return getformattedLocalTime(matches[1])
end
return {
description = "Displays the local time in an area",
usage = "!time [area]",
patterns = {"^!time (.*)$"},
run = run
}