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Mikubot-2/plugins/wikipedia.lua

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local command = 'wikipedia <query>'
local doc = [[```
/wikipedia <query>
Returns an article from Wikipedia.
Aliases: /w, /wiki
```]]
local triggers = {
'^/wikipedia[@'..bot.username..']*',
'^/wiki[@'..bot.username..']*',
'^/w[@'..bot.username..']*$',
'^/w[@'..bot.username..']* '
}
local action = function(msg)
local input = msg.text:input()
if not input then
if msg.reply_to_message and msg.reply_to_message.text then
input = msg.reply_to_message.text
else
sendMessage(msg.chat.id, doc, true, msg.message_id, true)
return
end
end
local gurl = 'https://ajax.googleapis.com/ajax/services/search/web?v=1.0&rsz=1&q=site:wikipedia.org%20'
local wurl = 'https://en.wikipedia.org/w/api.php?action=query&prop=extracts&format=json&exchars=4000&exsectionformat=plain&titles='
local jstr, res = HTTPS.request(gurl .. URL.escape(input))
if res ~= 200 then
sendReply(msg, config.errors.connection)
return
end
local jdat = JSON.decode(jstr)
if not jdat.responseData then
sendReply(msg, config.errors.connection)
return
end
if not jdat.responseData.results[1] then
sendReply(msg, config.errors.results)
return
end
--
local url = jdat.responseData.results[1].unescapedUrl
local title = jdat.responseData.results[1].titleNoFormatting:gsub(' %- Wikipedia, the free encyclopedia', '')
-- 'https://en.wikipedia.org/wiki/':len ≡ 30
jstr, res = HTTPS.request(wurl .. url:sub(31))
if res ~= 200 then
sendReply(msg, config.error.connection)
return
end
local text = JSON.decode(jstr).query.pages
for k,v in pairs(text) do
text = v.extract
break -- Seriously, there's probably a way more elegant solution.
end
if not text then
sendReply(msg, config.errors.results)
return
end
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text = text:gsub('</?.->', '')
local l = text:find('\n')
if l then
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text = text:sub(1, l-1)
end
title = title:gsub('%(.+%)', '')
--local output = '[' .. title .. '](' .. url .. ')\n' .. text:gsub('%[.+]%','')
--local output = '*' .. title .. '*\n' .. text:gsub('%[.+]%','') .. '\n[Read more.](' .. url .. ')'
local output = text:gsub('%[.+%]',''):gsub(title, '*'..title..'*') .. '\n'
if url:find('%(') then
output = output .. url:gsub('_', '\\_')
else
output = output .. '[Read more.](' .. url .. ')'
end
--
--[[ Comment the previous block and uncomment this one for full-message,
-- "unlinked" link previews.
-- Invisible zero-width, non-joiner.
local output = '[](' .. jdat.responseData.results[1].url .. ')'
]]--
sendMessage(msg.chat.id, output, true, nil, true)
end
return {
action = action,
triggers = triggers,
doc = doc,
command = command
}