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Mikubot-2/otouto/plugins/hackernews.lua

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local HTTPS = require('ssl.https')
local JSON = require('dkjson')
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local utilities = require('otouto.utilities')
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local bindings = require('otouto.bindings')
local hackernews = {}
hackernews.command = 'hackernews'
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local function get_hackernews_results()
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local results = {}
local jstr, code = HTTPS.request(hackernews.topstories_url)
if code ~= 200 then return end
local data = JSON.decode(jstr)
for i = 1, 8 do
local ijstr, icode = HTTPS.request(hackernews.res_url:format(data[i]))
if icode ~= 200 then return end
local idata = JSON.decode(ijstr)
local result
if idata.url then
result = string.format(
'\n• <code>[</code><a href="%s">%s</a><code>]</code> <a href="%s">%s</a>',
utilities.html_escape(hackernews.art_url:format(idata.id)),
idata.id,
utilities.html_escape(idata.url),
utilities.html_escape(idata.title)
)
else
result = string.format(
'\n• <code>[</code><a href="%s">%s</a><code>]</code> %s',
utilities.html_escape(hackernews.art_url:format(idata.id)),
idata.id,
utilities.html_escape(idata.title)
)
end
table.insert(results, result)
end
return results
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end
function hackernews:init(config)
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hackernews.triggers = utilities.triggers(self.info.username, config.cmd_pat):t('hackernews', true):t('hn', true).table
hackernews.doc = [[Returns four (if group) or eight (if private message) top stories from Hacker News.
Alias: ]] .. config.cmd_pat .. 'hn'
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hackernews.topstories_url = 'https://hacker-news.firebaseio.com/v0/topstories.json'
hackernews.res_url = 'https://hacker-news.firebaseio.com/v0/item/%s.json'
hackernews.art_url = 'https://news.ycombinator.com/item?id=%s'
hackernews.last_update = 0
if config.hackernews_onstart == true then
hackernews.results = get_hackernews_results()
if hackernews.results then hackernews.last_update = os.time() / 60 end
end
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end
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function hackernews:action(msg, config)
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local now = os.time() / 60
if not hackernews.results or hackernews.last_update + config.hackernews_interval < now then
bindings.sendChatAction(self, { chat_id = msg.chat.id, action = 'typing' })
hackernews.results = get_hackernews_results()
if not hackernews.results then
utilities.send_reply(self, msg, config.errors.connection)
return
end
hackernews.last_update = now
end
-- Four results in a group, eight in private.
local res_count = msg.chat.id == msg.from.id and 8 or 4
local output = '<b>Top Stories from Hacker News:</b>'
for i = 1, res_count do
output = output .. hackernews.results[i]
end
utilities.send_message(self, msg.chat.id, output, true, nil, 'html')
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end
return hackernews