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Mikubot-2/plugins/calc.lua
topkecleon 725261fcf7 Version 3.8
Relicense to AGPLv3, with consent of contributors.
bindings.lua completely rewritten. Shift to multipart-post.
Updated readme.
New plugins: bing.lua, channel.lua.
Removed plugins: floodcontrol.lua, librefm.lua.
luarun.lua: Will now serialize returned tables. Aliased "/return" to "/lua return".
2016-05-29 13:08:39 -04:00

44 lines
1.0 KiB
Lua
Executable File

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