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Mikubot-2/otouto/plugins/rss.lua
Andreas Bielawski a20801c458 wtf?
2016-07-02 17:49:58 +02:00

319 lines
9.4 KiB
Lua

local rss = {}
local http = require('socket.http')
local https = require('ssl.https')
local url = require('socket.url')
local utilities = require('otouto.utilities')
local redis = (loadfile "./otouto/redis.lua")()
local feedparser = require("feedparser")
rss.command = 'rss <sub/del>'
function rss:init(config)
rss.triggers = utilities.triggers(self.info.username, config.cmd_pat):t('rss', true).table
rss.doc = [[*
]]..config.cmd_pat..[[rss*: Feed-Abonnements anzeigen
*]]..config.cmd_pat..[[rss* _sub_ _<URL>_: Diesen Feed abonnieren
*]]..config.cmd_pat..[[rss* _del_ _<#>_: Diesen Feed deabonnieren
*]]..config.cmd_pat..[[rss* _sync_: Feeds syncen (nur Superuser)]]
end
function tail(n, k)
local u, r=''
for i=1,k do
n,r = math.floor(n/0x40), n%0x40
u = string.char(r+0x80) .. u
end
return u, n
end
function to_utf8(a)
local n, r, u = tonumber(a)
if n<0x80 then -- 1 byte
return string.char(n)
elseif n<0x800 then -- 2 byte
u, n = tail(n, 1)
return string.char(n+0xc0) .. u
elseif n<0x10000 then -- 3 byte
u, n = tail(n, 2)
return string.char(n+0xe0) .. u
elseif n<0x200000 then -- 4 byte
u, n = tail(n, 3)
return string.char(n+0xf0) .. u
elseif n<0x4000000 then -- 5 byte
u, n = tail(n, 4)
return string.char(n+0xf8) .. u
else -- 6 byte
u, n = tail(n, 5)
return string.char(n+0xfc) .. u
end
end
function unescape_for_rss(str)
str = string.gsub( str, '&lt;', '<' )
str = string.gsub( str, '&gt;', '>' )
str = string.gsub( str, '&quot;', '"' )
str = string.gsub( str, '&apos;', "'" )
str = string.gsub( str, "&Auml;", "Ä")
str = string.gsub( str, "&auml;", "ä")
str = string.gsub( str, "&Ouml;", "Ö")
str = string.gsub( str, "&ouml;", "ö")
str = string.gsub( str, "Uuml;", "Ü")
str = string.gsub( str, "&uuml;", "ü")
str = string.gsub( str, "&szlig;", "ß")
str = string.gsub(str, '&#(%d+);', to_utf8)
str = string.gsub( str, '&#x(%d+);', function(n) return string.char(tonumber(n,16)) end )
str = string.gsub( str, '&amp;', '&' ) -- Be sure to do this after all others
return str
end
function get_base_redis(id, option, extra)
local ex = ''
if option ~= nil then
ex = ex .. ':' .. option
if extra ~= nil then
ex = ex .. ':' .. extra
end
end
return 'rss:' .. id .. ex
end
function prot_url(url)
local url, h = string.gsub(url, "http://", "")
local url, hs = string.gsub(url, "https://", "")
local protocol = "http"
if hs == 1 then
protocol = "https"
end
return url, protocol
end
function get_rss(url, prot)
local res, code = nil, 0
if prot == "http" then
res, code = http.request(url)
elseif prot == "https" then
res, code = https.request(url)
end
if code ~= 200 then
return nil, "Fehler beim Erreichen von " .. url
end
local parsed = feedparser.parse(res)
if parsed == nil then
return nil, "Fehler beim Dekodieren des Feeds.\nBist du sicher, dass "..url.." ein Feed ist?"
end
return parsed, nil
end
function get_new_entries(last, nentries)
local entries = {}
for k,v in pairs(nentries) do
if v.id == last then
return entries
else
table.insert(entries, v)
end
end
return entries
end
function print_subs(id, chat_name)
local uhash = get_base_redis(id)
local subs = redis:smembers(uhash)
local text = '"'..chat_name..'" hat abonniert:\n---------\n'
for k,v in pairs(subs) do
text = text .. k .. ") " .. v .. '\n'
end
return text
end
function rss:subscribe(id, url)
local baseurl, protocol = prot_url(url)
local prothash = get_base_redis(baseurl, "protocol")
local lasthash = get_base_redis(baseurl, "last_entry")
local lhash = get_base_redis(baseurl, "subs")
local uhash = get_base_redis(id)
if redis:sismember(uhash, baseurl) then
return "Du hast `"..url.."` bereits abonniert."
end
local parsed, err = get_rss(url, protocol)
if err ~= nil then
return err
end
local last_entry = ""
if #parsed.entries > 0 then
last_entry = parsed.entries[1].id
end
local name = parsed.feed.title
redis:set(prothash, protocol)
redis:set(lasthash, last_entry)
redis:sadd(lhash, id)
redis:sadd(uhash, baseurl)
return "_"..name.."_ abonniert!"
end
function rss:unsubscribe(id, n)
if #n > 5 then
return "Du kannst nicht mehr als fünf Feeds abonnieren!"
end
n = tonumber(n)
local uhash = get_base_redis(id)
local subs = redis:smembers(uhash)
if n < 1 or n > #subs then
return "Abonnement-ID zu hoch!"
end
local sub = subs[n]
local lhash = get_base_redis(sub, "subs")
redis:srem(uhash, sub)
redis:srem(lhash, id)
local left = redis:smembers(lhash)
if #left < 1 then -- no one subscribed, remove it
local prothash = get_base_redis(sub, "protocol")
local lasthash = get_base_redis(sub, "last_entry")
redis:del(prothash)
redis:del(lasthash)
end
return "Du hast `"..sub.."` deabonniert."
end
function rss:print_subs(id, chat_name)
local uhash = get_base_redis(id)
local subs = redis:smembers(uhash)
if not subs[1] then
return 'Keine Feeds abonniert!'
end
local keyboard = '{"keyboard":[['
local keyboard_buttons = ''
local text = '*'..chat_name..'* hat abonniert:\n---------\n'
for k,v in pairs(subs) do
text = text .. k .. ") " .. v .. '\n'
if k == #subs then
keyboard_buttons = keyboard_buttons..'{"text":"/rss del '..k..'"}'
break;
end
keyboard_buttons = keyboard_buttons..'{"text":"/rss del '..k..'"},'
end
local keyboard = keyboard..keyboard_buttons..']], "one_time_keyboard":true, "selective":true, "resize_keyboard":true}'
return text, keyboard
end
function rss:action(msg, config)
local input = utilities.input(msg.text)
local id = "user#id" .. msg.from.id
if msg.chat.type == 'channel' then
print('Kanäle werden momentan nicht unterstützt')
end
if msg.chat.type == 'group' or msg.chat.type == 'supergroup' then
id = 'chat#id'..msg.chat.id
end
if not input then
if msg.chat.type == 'group' or msg.chat.type == 'supergroup' then
chat_name = msg.chat.title
else
chat_name = msg.chat.first_name
end
local output = rss:print_subs(id, chat_name)
utilities.send_reply(self, msg, output, true)
return
end
if input:match('(sub) (https?://[%w-_%.%?%.:/%+=&%~]+)$') then
if msg.from.id ~= config.admin then
utilities.send_reply(self, msg, config.errors.sudo)
return
end
local rss_url = input:match('(https?://[%w-_%.%?%.:/%+=&%~]+)$')
local output = rss:subscribe(id, rss_url)
utilities.send_reply(self, msg, output, true)
elseif input:match('(del) (%d+)$') then
if msg.from.id ~= config.admin then
utilities.send_reply(self, msg, config.errors.sudo)
return
end
local rss_url = input:match('(%d+)$')
local output = rss:unsubscribe(id, rss_url)
utilities.send_reply(self, msg, output, true, '{"hide_keyboard":true}')
elseif input:match('(del)$') then
if msg.chat.type == 'group' or msg.chat.type == 'supergroup' then
chat_name = msg.chat.title
else
chat_name = msg.chat.first_name
end
local list_subs, keyboard = rss:print_subs(id, chat_name)
utilities.send_reply(self, msg, list_subs, true, keyboard)
return
elseif input:match('(sync)$') then
if msg.from.id ~= config.admin then
utilities.send_reply(self, msg, config.errors.sudo)
return
end
rss:cron(self)
end
return
end
function rss:cron(self_plz)
if not self.BASE_URL then
self = self_plz
end
local keys = redis:keys(get_base_redis("*", "subs"))
for k,v in pairs(keys) do
local base = string.match(v, "rss:(.+):subs") -- Get the URL base
print('RSS: '..base)
local prot = redis:get(get_base_redis(base, "protocol"))
local last = redis:get(get_base_redis(base, "last_entry"))
local url = prot .. "://" .. base
local parsed, err = get_rss(url, prot)
if err ~= nil then
return
end
-- local feed_title = parsed.feed.title
local newentr = get_new_entries(last, parsed.entries)
local subscribers = {}
local text = '' -- Send one message per feed with the latest entries
for k2, v2 in pairs(newentr) do
local title = v2.title or 'Kein Titel'
local link = v2.link or v2.id or 'Kein Link'
if v2.content then
if string.len(v2.content) > 250 then
content = string.sub(unescape_for_rss(v2.content:gsub("%b<>", "")), 1, 250) .. '...'
else
content = unescape_for_rss(v2.content:gsub("%b<>", ""))
end
elseif v2.summary then
if string.len(v2.summary) > 250 then
content = string.sub(unescape_for_rss(v2.summary:gsub("%b<>", "")), 1, 250) .. '...'
else
content = unescape_for_rss(v2.summary:gsub("%b<>", ""))
end
else
content = ''
end
text = text..'\n#RSS: *'..title..'*\n'..utilities.md_escape(content)..' [Weiterlesen]('..link..')\n'
end
if text ~= '' then
local newlast = newentr[1].id
redis:set(get_base_redis(base, "last_entry"), newlast)
for k2, receiver in pairs(redis:smembers(v)) do
local receiver = string.gsub(receiver, 'chat%#id', '')
local receiver = string.gsub(receiver, 'user%#id', '')
utilities.send_message(self, receiver, text, true, nil, true)
end
end
end
end
return rss