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Mikubot-2/otouto/plugins/calc.lua

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local calc = {}
local URL = require('socket.url')
local HTTPS = require('ssl.https')
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local utilities = require('otouto.utilities')
calc.command = 'calc <expression>'
function calc:init(config)
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calc.triggers = utilities.triggers(self.info.username, config.cmd_pat):t('calc', true).table
calc.doc = config.cmd_pat .. [[calc <expression>
Returns solutions to mathematical expressions and conversions between common units. Results provided by mathjs.org.]]
end
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function calc:action(msg, config)
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local input = utilities.input_from_msg(msg)
if not input then
utilities.send_reply(self, msg, calc.doc, true)
return
end
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local url = 'https://api.mathjs.org/v1/?expr=' .. URL.escape(input)
local output = HTTPS.request(url)
output = output and '`'..output..'`' or config.errors.connection
utilities.send_reply(self, msg, output, true)
end
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return calc