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Mikubot-2/plugins/calc.lua

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local PLUGIN = {}
PLUGIN.doc = [[
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/calc <expression>
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This command solves math expressions and does conversion between common units. See mathjs.org/docs/expressions/syntax for a list of accepted syntax.
]]
PLUGIN.triggers = {
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'^/calc'
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}
function PLUGIN.action(msg)
local input = get_input(msg.text)
if not input then
return send_msg(msg, PLUGIN.doc)
end
local url = 'http://api.mathjs.org/v1/?expr=' .. URL.escape(input)
local message, res = HTTP.request(url)
if res ~= 200 then
return send_msg(msg, 'Connection error.')
end
send_msg(msg, message)
end
return PLUGIN