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Mikubot-2/plugins/currency.lua

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local doc = [[
/cash [amount] <from> to <to>
Example: /cash 5 USD to EUR
Returns exchange rates for various currencies.
]]
local triggers = {
'^/cash[@'..bot.username..']*'
}
local action = function(msg)
local input = msg.text:upper()
if not input:match('%a%a%a TO %a%a%a') then
sendReply(msg, doc)
return
end
local from = input:match('(%a%a%a) TO')
local to = input:match('TO (%a%a%a)')
local amount = input:match('([%d]+) %a%a%a TO %a%a%a') or 1
local result = 1
local url = 'https://www.google.com/finance/converter'
if from ~= to then
local url = url .. '?from=' .. from .. '&to=' .. to .. '&a=' .. amount
local str, res = HTTPS.request(url)
if res ~= 200 then
sendReply(msg, config.errors.connection)
return
end
str = str:match('<span class=bld>(.*) %u+</span>')
if not str then
sendReply(msg, config.errors.results)
return
end
result = str:format('%.2f')
end
local message = amount .. ' ' .. from .. ' = ' .. result .. ' ' .. to
sendReply(msg, message)
end
return {
action = action,
triggers = triggers,
doc = doc
}