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lastfm.lua
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lastfm.lua
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--[[
Based on a plugin by topkecleon. Licensed under GNU AGPLv3
https://github.com/topkecleon/otouto/blob/master/LICENSE.
Copyright 2020 Matthew Hesketh <matthew@matthewhesketh.com>
This code is licensed under the MIT. See LICENSE for details.
]]
local lastfm = {}
local mattata = require('mattata')
local http = require('socket.http')
local url = require('socket.url')
local json = require('dkjson')
local redis = require('libs.redis')
function lastfm:init(configuration)
assert(configuration.keys.lastfm, 'lastfm.lua requires an API key, and you haven\'t got one configured!')
lastfm.commands = mattata.commands(self.info.username):command('lastfm'):command('np'):command('fmset').table
lastfm.help = '/np <username> - Returns what you are or were last listening to. If you specify a username, info will be returned for that username. /fmset <username> - Sets your last.fm username. Use /fmset -del to delete your current username.'
lastfm.url = 'http://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&format=json&limit=1&api_key='
end
function lastfm.set_username(user_object, name, language)
redis:hset('user:' .. user_object.id .. ':info', 'lastfm', name)
return string.format(language['lastfm']['1'], user_object.first_name, name)
end
function lastfm.del_username(user_id, language)
if redis:hget('user:' .. user_id .. ':info', 'lastfm') then
redis:hdel('user:' .. user_id .. ':info', 'lastfm')
return language['lastfm']['2']
end
return language['lastfm']['3']
end
function lastfm.get_username(user_id)
return redis:hget('user:' .. user_id .. ':info', 'lastfm')
end
function lastfm:on_message(message, configuration, language)
local input = mattata.input(message.text)
if message.text:match('^[/!#]lastfm') then
return mattata.send_reply(message, lastfm.help)
elseif message.text:match('^[/!#]fmset') then
input = input or message.from.username
if not input then
return mattata.send_reply(message, lastfm.help)
elseif input == '-del' then
local output = lastfm.del_username(message.from.id, language)
return mattata.send_reply(message, output)
end
local output = lastfm.set_username(message.from, input, language)
return mattata.send_reply(message, output)
end
local username, output
if input then
username = input
elseif lastfm.get_username(message.from.id, language) then
username = lastfm.get_username(message.from.id)
else
return mattata.send_reply(message, language['lastfm']['4'])
end
local jstr, res = http.request(lastfm.url .. configuration.keys.lastfm .. '&user=' .. url.escape(username))
if res ~= 200 then
return mattata.send_reply(message, language['errors']['connection'])
end
local jdat = json.decode(jstr)
if jdat.error then
return mattata.send_reply(message, language['lastfm']['4'])
end
if not jdat or not jdat.recenttracks then
return mattata.send_reply(message.chat.id, language['lastfm']['5'])
end
jdat = jdat.recenttracks.track[1] or jdat.recenttracks.track
output = input and mattata.escape_html(input) or string.format('<a href="%s">%s</a>', 'https://last.fm/user/' .. url.escape(username), mattata.escape_html(message.from.first_name))
output = (jdat['@attr'] and jdat['@attr'].nowplaying) and string.format(language['lastfm']['6'], output) or string.format(language['lastfm']['7'], output)
local title = jdat.name or language['lastfm']['8']
local artist = jdat.artist and jdat.artist['#text'] or language['lastfm']['8']
if artist and title ~= jdat.name then
mattata.send_chat_action(message.chat.id)
return mattata.send_message(message.chat.id, output .. artist .. ' - ' .. title)
elseif jdat.image and jdat.image[1]['#text'] == '' then
return mattata.send_message(message.chat.id, output .. artist .. ' - ' .. title)
end
mattata.send_chat_action(message.chat.id, 'upload_photo')
output = output .. string.format('<a href="%s">%s</a>', jdat.url, artist .. ' - ' .. title)
return mattata.send_photo(message.chat.id, jdat.image[4]['#text'], output, 'html')
end
return lastfm

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