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Mikubot-2/otouto/utilities.lua

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2015-07-03 00:15:52 +02:00
-- utilities.lua
-- Functions shared among plugins.
local utilities = {}
local HTTP = require('socket.http')
local ltn12 = require('ltn12')
local HTTPS = require('ssl.https')
local URL = require('socket.url')
local JSON = require('dkjson')
local http = require('socket.http')
local serpent = require("serpent")
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local bindings = require('otouto.bindings')
local redis = (loadfile "./otouto/redis.lua")()
local mimetype = (loadfile "./otouto/mimetype.lua")()
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HTTP.timeout = 10
-- For the sake of ease to new contributors and familiarity to old contributors,
-- we'll provide a couple of aliases to real bindings here.
function utilities:send_message(chat_id, text, disable_web_page_preview, reply_to_message_id, use_markdown, reply_markup)
return bindings.request(self, 'sendMessage', {
chat_id = chat_id,
text = text,
disable_web_page_preview = disable_web_page_preview,
reply_to_message_id = reply_to_message_id,
parse_mode = use_markdown and 'Markdown' or nil,
reply_markup = reply_markup
} )
end
-- https://core.telegram.org/bots/api#editmessagetext
function utilities:edit_message(chat_id, message_id, text, disable_web_page_preview, use_markdown, reply_markup)
return bindings.request(self, 'editMessageText', {
chat_id = chat_id,
message_id = message_id,
text = text,
disable_web_page_preview = disable_web_page_preview,
parse_mode = use_markdown and 'Markdown' or nil,
reply_markup = reply_markup
} )
end
function utilities:send_reply(old_msg, text, use_markdown, reply_markup)
return bindings.request(self, 'sendMessage', {
chat_id = old_msg.chat.id,
text = text,
disable_web_page_preview = true,
reply_to_message_id = old_msg.message_id,
parse_mode = use_markdown and 'Markdown' or nil,
reply_markup = reply_markup
} )
end
-- NOTE: Telegram currently only allows file uploads up to 50 MB
-- https://core.telegram.org/bots/api#sendphoto
function utilities:send_photo(chat_id, file, text, reply_to_message_id, reply_markup)
if not file then return false end
local output = bindings.request(self, 'sendPhoto', {
chat_id = chat_id,
caption = text or nil,
reply_to_message_id = reply_to_message_id,
reply_markup = reply_markup
}, {photo = file} )
if string.match(file, '/tmp/') then
os.remove(file)
print("Deleted: "..file)
end
return output
end
-- https://core.telegram.org/bots/api#sendaudio
function utilities:send_audio(chat_id, file, reply_to_message_id, duration, performer, title)
if not file then return false end
local output = bindings.request(self, 'sendAudio', {
chat_id = chat_id,
duration = duration or nil,
performer = performer or nil,
title = title or nil,
reply_to_message_id = reply_to_message_id
}, {audio = file} )
if string.match(file, '/tmp/') then
os.remove(file)
print("Deleted: "..file)
end
return output
end
-- https://core.telegram.org/bots/api#senddocument
function utilities:send_document(chat_id, file, text, reply_to_message_id, reply_markup)
if not file then return false end
local output = bindings.request(self, 'sendDocument', {
chat_id = chat_id,
caption = text or nil,
reply_to_message_id = reply_to_message_id,
reply_markup = reply_markup
}, {document = file} )
if string.match(file, '/tmp/') then
os.remove(file)
print("Deleted: "..file)
end
return output
end
-- https://core.telegram.org/bots/api#sendvideo
function utilities:send_video(chat_id, file, text, reply_to_message_id, duration, width, height)
if not file then return false end
local output = bindings.request(self, 'sendVideo', {
chat_id = chat_id,
caption = text or nil,
duration = duration or nil,
width = width or nil,
height = height or nil,
reply_to_message_id = reply_to_message_id
}, {video = file} )
if string.match(file, '/tmp/') then
os.remove(file)
print("Deleted: "..file)
end
return output
end
-- NOTE: Voice messages are .ogg files encoded with OPUS
-- https://core.telegram.org/bots/api#sendvoice
function utilities:send_voice(chat_id, file, text, reply_to_message_id, duration)
if not file then return false end
local output = bindings.request(self, 'sendVoice', {
chat_id = chat_id,
duration = duration or nil,
reply_to_message_id = reply_to_message_id
}, {voice = file} )
if string.match(file, '/tmp/') then
os.remove(file)
print("Deleted: "..file)
end
return output
end
-- https://core.telegram.org/bots/api#sendlocation
function utilities:send_location(chat_id, latitude, longitude, reply_to_message_id)
return bindings.request(self, 'sendLocation', {
chat_id = chat_id,
latitude = latitude,
longitude = longitude,
reply_to_message_id = reply_to_message_id
} )
end
-- NOTE: Venue is different from location: it shows information, such as the street adress or
-- title of the location with it.
-- https://core.telegram.org/bots/api#sendvenue
function utilities:send_venue(chat_id, latitude, longitude, reply_to_message_id, title, address)
return bindings.request(self, 'sendVenue', {
chat_id = chat_id,
latitude = latitude,
longitude = longitude,
title = title,
address = address,
reply_to_message_id = reply_to_message_id
} )
end
-- https://core.telegram.org/bots/api#sendchataction
function utilities:send_typing(chat_id, action)
return bindings.request(self, 'sendChatAction', {
chat_id = chat_id,
action = action
} )
end
-- https://core.telegram.org/bots/api#answercallbackquery
function utilities:answer_callback_query(callback, text, show_alert)
return bindings.request(self, 'answerCallbackQuery', {
callback_query_id = callback.id,
text = text,
show_alert = show_alert
} )
end
-- https://core.telegram.org/bots/api#getchat
function utilities:get_chat_info(chat_id)
return bindings.request(self, 'getChat', {
chat_id = chat_id
} )
end
-- https://core.telegram.org/bots/api#getchatadministrators
function utilities:get_chat_administrators(chat_id)
return bindings.request(self, 'getChatAdministrators', {
chat_id = chat_id
} )
end
-- https://core.telegram.org/bots/api#answerinlinequery
function utilities:answer_inline_query(inline_query, results, cache_time, is_personal, next_offset, switch_pm_text, switch_pm_parameter)
return bindings.request(self, 'answerInlineQuery', {
inline_query_id = inline_query.id,
results = results,
cache_time = cache_time,
is_personal = is_personal,
next_offset = next_offset,
switch_pm_text = switch_pm_text,
switch_pm_parameter = switch_pm_parameter
} )
end
-- get the indexed word in a string
function utilities.get_word(s, i)
s = s or ''
i = i or 1
local t = {}
for w in s:gmatch('%g+') do
table.insert(t, w)
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end
return t[i] or false
end
-- Like get_word(), but better.
-- Returns the actual index.
function utilities.index(s)
local t = {}
for w in s:gmatch('%g+') do
table.insert(t, w)
end
return t
end
-- Returns the string after the first space.
function utilities.input(s)
if not s:find(' ') then
return false
end
return s:sub(s:find(' ')+1)
end
-- Calculates the length of the given string as UTF-8 characters
function utilities.utf8_len(s)
local chars = 0
for i = 1, string.len(s) do
local b = string.byte(s, i)
if b < 128 or b >= 192 then
chars = chars + 1
end
end
return chars
end
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-- Trims whitespace from a string.
function utilities.trim(str)
local s = str:gsub('^%s*(.-)%s*$', '%1')
return s
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end
-- Retruns true if the string is empty
function string:isempty()
return self == nil or self == ''
end
-- Retruns true if the string is blank
function string:isblank()
self = self:trim()
return self:isempty()
end
function get_name(msg)
local name = msg.from.first_name
if name == nil then
name = msg.from.id
end
return name
end
-- http://www.lua.org/manual/5.2/manual.html#pdf-io.popen
function run_command(str)
local cmd = io.popen(str)
local result = cmd:read('*all')
cmd:close()
return result
end
function convert_timestamp(timestamp, format)
local converted_date = run_command('date -d @'..timestamp..' +"'..format..'"')
local converted_date = string.gsub(converted_date, '%\n', '')
return converted_date
end
function string.starts(String, Start)
return Start == string.sub(String,1,string.len(Start))
end
-- Saves file to $HOME/tmp/. If file_name isn't provided,
-- will get the text after the last "/" for filename
-- and content-type for extension
function download_to_file(url, file_name)
print('url to download: '..url)
if not file_name then
file_name = '/tmp/' .. url:match('.+/(.-)$') or '/tmp/' .. os.time()
else
file_name = '/tmp/' .. file_name
end
local body = {}
local doer = HTTP
local do_redir = true
if url:match('^https') then
doer = HTTPS
do_redir = false
end
local _, res = doer.request{
url = url,
sink = ltn12.sink.table(body),
redirect = do_redir
}
if res ~= 200 then return false end
local file = io.open(file_name, 'w+')
file:write(table.concat(body))
file:close()
print('Saved to: '..file_name)
return file_name
end
function vardump(value)
print(serpent.block(value, {comment=false}))
end
-- Loads a JSON file as a table.
function utilities.load_data(filename)
local f = io.open(filename)
if not f then
return {}
end
local s = f:read('*all')
f:close()
local data = JSON.decode(s)
return data
end
-- Saves a table to a JSON file.
function utilities.save_data(filename, data)
local s = JSON.encode(data)
local f = io.open(filename, 'w')
f:write(s)
f:close()
end
-- Gets coordinates for a location. Used by gMaps.lua, time.lua, weather.lua.
function utilities.get_coords(input, config)
local url = 'https://maps.googleapis.com/maps/api/geocode/json?address=' .. URL.escape(input)
local jstr, res = HTTPS.request(url)
if res ~= 200 then
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return config.errors.connection
end
local jdat = JSON.decode(jstr)
if jdat.status == 'ZERO_RESULTS' then
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return config.errors.results
end
return {
lat = jdat.results[1].geometry.location.lat,
lon = jdat.results[1].geometry.location.lng
}
end
-- Get the number of values in a key/value table.
function utilities.table_size(tab)
local i = 0
for _,_ in pairs(tab) do
i = i + 1
end
return i
end
-- Just an easy way to get a user's full name.
-- Alternatively, abuse it to concat two strings like I do.
function utilities.build_name(first, last)
if last then
return first .. ' ' .. last
else
return first
end
end
function utilities:resolve_username(input)
input = input:gsub('^@', '')
for _, user in pairs(self.database.users) do
if user.username and user.username:lower() == input:lower() then
local t = {}
for key, val in pairs(user) do
t[key] = val
end
return t
end
end
end
-- Simpler than above function; only returns an ID.
-- Returns nil if no ID is available.
function utilities:id_from_username(input)
input = input:gsub('^@', '')
for _, user in pairs(self.database.users) do
if user.username and user.username:lower() == input:lower() then
return user.id
end
end
end
-- Simpler than below function; only returns an ID.
-- Returns nil if no ID is available.
function utilities:id_from_message(msg)
if msg.reply_to_message then
return msg.reply_to_message.from.id
else
local input = utilities.input(msg.text)
if input then
if tonumber(input) then
return tonumber(input)
elseif input:match('^@') then
return utilities.id_from_username(self, input)
end
end
end
end
function utilities:user_from_message(msg, no_extra)
local input = utilities.input(msg.text_lower)
local target = {}
if msg.reply_to_message then
for k,v in pairs(self.database.users[msg.reply_to_message.from.id_str]) do
target[k] = v
end
elseif input and tonumber(input) then
target.id = tonumber(input)
if self.database.users[input] then
for k,v in pairs(self.database.users[input]) do
target[k] = v
end
end
elseif input and input:match('^@') then
local uname = input:gsub('^@', '')
for _,v in pairs(self.database.users) do
if v.username and uname == v.username:lower() then
for key, val in pairs(v) do
target[key] = val
end
end
end
if not target.id then
target.err = 'Sorry, I don\'t recognize that username.'
end
else
target.err = 'Please specify a user via reply, ID, or username.'
end
if not no_extra then
if target.id then
target.id_str = tostring(target.id)
end
if not target.first_name then
target.first_name = 'User'
end
target.name = utilities.build_name(target.first_name, target.last_name)
end
return target
end
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function utilities:handle_exception(err, message, config)
if not err then err = '' end
local output = '\n[' .. os.date('%F %T', os.time()) .. ']\n' .. self.info.username .. ': ' .. err .. '\n' .. message .. '\n'
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if config.log_chat then
output = '```' .. output .. '```'
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utilities.send_message(self, config.log_chat, output, true, nil, true)
else
print(output)
end
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end
-- MOVED TO DOWNLOAD_TO_FILE
function utilities.download_file(url, filename)
return download_to_file(url, filename)
end
function utilities.markdown_escape(text)
text = text:gsub('_', '\\_')
text = text:gsub('%[', '\\[')
text = text:gsub('%]', '\\]')
text = text:gsub('%*', '\\*')
text = text:gsub('`', '\\`')
return text
end
function utilities.markdown_escape_simple(text)
text = text:gsub('_', '\\_')
text = text:gsub('%*', '\\*')
text = text:gsub('`', '\\`')
return text
end
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utilities.md_escape = utilities.markdown_escape
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utilities.triggers_meta = {}
utilities.triggers_meta.__index = utilities.triggers_meta
function utilities.triggers_meta:t(pattern, has_args)
local username = self.username:lower()
table.insert(self.table, '^'..self.cmd_pat..pattern..'$')
table.insert(self.table, '^'..self.cmd_pat..pattern..'@'..username..'$')
if has_args then
table.insert(self.table, '^'..self.cmd_pat..pattern..'%s+[^%s]*')
table.insert(self.table, '^'..self.cmd_pat..pattern..'@'..username..'%s+[^%s]*')
end
return self
end
function utilities.triggers(username, cmd_pat, trigger_table)
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local self = setmetatable({}, utilities.triggers_meta)
self.username = username
self.cmd_pat = cmd_pat
self.table = trigger_table or {}
return self
end
function utilities.with_http_timeout(timeout, fun)
local original = HTTP.TIMEOUT
HTTP.TIMEOUT = timeout
fun()
HTTP.TIMEOUT = original
end
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function utilities.enrich_user(user)
user.id_str = tostring(user.id)
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user.name = utilities.build_name(user.first_name, user.last_name)
return user
end
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function utilities.enrich_message(msg)
if not msg.text then msg.text = msg.caption or '' end
msg.text_lower = msg.text:lower()
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msg.from = utilities.enrich_user(msg.from)
msg.chat.id_str = tostring(msg.chat.id)
if msg.reply_to_message then
if not msg.reply_to_message.text then
msg.reply_to_message.text = msg.reply_to_message.caption or ''
end
msg.reply_to_message.text_lower = msg.reply_to_message.text:lower()
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msg.reply_to_message.from = utilities.enrich_user(msg.reply_to_message.from)
msg.reply_to_message.chat.id_str = tostring(msg.reply_to_message.chat.id)
end
if msg.forward_from then
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msg.forward_from = utilities.enrich_user(msg.forward_from)
end
if msg.new_chat_participant then
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msg.new_chat_participant = utilities.enrich_user(msg.new_chat_participant)
end
if msg.left_chat_participant then
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msg.left_chat_participant = utilities.enrich_user(msg.left_chat_participant)
end
return msg
end
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function utilities.pretty_float(x)
if x % 1 == 0 then
return tostring(math.floor(x))
else
return tostring(x)
end
end
-- This table will store unsavory characters that are not properly displayed,
-- or are just not fun to type.
utilities.char = {
zwnj = '',
arabic = '[\216-\219][\128-\191]',
rtl_override = '',
rtl_mark = '',
em_dash = ''
}
-- taken from http://stackoverflow.com/a/11130774/3163199
function scandir(directory)
local i, t, popen = 0, {}, io.popen
for filename in popen('ls -a "'..directory..'"'):lines() do
i = i + 1
t[i] = filename
end
return t
end
-- Returns at table of lua files inside plugins
function plugins_names()
local files = {}
for k, v in pairs(scandir("otouto/plugins")) do
-- Ends with .lua
if (v:match(".lua$")) then
table.insert(files, v)
end
end
return files
end
-- Function name explains what it does.
function file_exists(name)
local f = io.open(name,"r")
if f ~= nil then
io.close(f)
return true
else
return false
end
end
-- Returns a table with matches or nil
function match_pattern(pattern, text)
if text then
local matches = { string.match(text, pattern) }
if next(matches) then
return matches
end
end
-- nil
end
function is_sudo(msg, config)
local var = false
-- Check if user id is sudoer
if config.admin == msg.from.id then
var = true
end
return var
end
function post_petition(url, arguments, headers)
local url, h = string.gsub(url, "http://", "")
local url, hs = string.gsub(url, "https://", "")
local post_prot = "http"
if hs == 1 then
post_prot = "https"
end
local response_body = {}
local request_constructor = {
url = post_prot..'://'..url,
method = "POST",
sink = ltn12.sink.table(response_body),
headers = headers or {},
redirect = false
}
local source = arguments
if type(arguments) == "table" then
local source = helpers.url_encode_arguments(arguments)
end
if not headers then
request_constructor.headers["Content-Type"] = "application/x-www-form-urlencoded; charset=UTF8"
request_constructor.headers["X-Accept"] = "application/json"
request_constructor.headers["Accept"] = "application/json"
end
request_constructor.headers["Content-Length"] = tostring(#source)
request_constructor.source = ltn12.source.string(source)
if post_prot == "http" then
ok, response_code, response_headers, response_status_line = http.request(request_constructor)
else
ok, response_code, response_headers, response_status_line = HTTPS.request(request_constructor)
end
if not ok then
return nil
end
response_body = JSON.decode(table.concat(response_body))
return response_body, response_headers
end
function get_redis_hash(msg, var)
if msg.chat.type == 'group' or msg.chat.type == 'supergroup' then
return 'chat:'..msg.chat.id..':'..var
end
if msg.chat.type == 'private' then
return 'user:'..msg.from.id..':'..var
end
end
-- remove whitespace
function all_trim(s)
return s:match( "^%s*(.-)%s*$" )
end
function tablelength(T)
local count = 0
for _ in pairs(T) do count = count + 1 end
return count
end
function round(num, idp)
if idp and idp>0 then
local mult = 10^idp
return math.floor(num * mult + 0.5) / mult
end
return math.floor(num + 0.5)
end
function comma_value(amount)
local formatted = amount
while true do
formatted, k = string.gsub(formatted, "^(-?%d+)(%d%d%d)", '%1.%2')
if (k==0) then
break
end
end
return formatted
end
function string.ends(str, fin)
return fin=='' or string.sub(str,-string.len(fin)) == fin
end
function get_location(user_id)
local hash = 'user:'..user_id
local set_location = redis:hget(hash, 'location')
if set_location == 'false' or set_location == nil then
return false
else
return set_location
end
end
function cache_data(plugin, query, data, timeout, typ)
-- How to: cache_data(pluginname, query_name, data_to_cache, expire_in_seconds)
local hash = 'telegram:cache:'..plugin..':'..query
if timeout then
print('Caching "'..query..'" from plugin '..plugin..' (expires in '..timeout..' seconds)')
else
print('Caching "'..query..'" from plugin '..plugin..' (expires never)')
end
if typ == 'key' then
redis:set(hash, data)
elseif typ == 'set' then
-- make sure that you convert your data into a table:
-- {"foo", "bar", "baz"} instead of
-- {"bar" = "foo", "foo" = "bar", "bar" = "baz"}
-- because other formats are not supported by redis (or I haven't found a way to store them)
for _,str in pairs(data) do
redis:sadd(hash, str)
end
else
redis:hmset(hash, data)
end
if timeout then
redis:expire(hash, timeout)
end
end
-- Caches file_id and last_modified
-- result = result of send_X() (see media.lua)
function cache_file(result, url, last_modified)
local hash = 'telegram:cache:sent_file'
if result.result.video then
file_id = result.result.video.file_id
elseif result.result.audio then
file_id = result.result.audio.file_id
elseif result.result.voice then
file_id = result.result.voice.file_id
elseif result.result.document then
file_id = result.result.document.file_id
elseif result.result.photo then
local lv = #result.result.photo
file_id = result.result.photo[lv].file_id
end
print('Caching File...')
redis:hset(hash..':'..url, 'file_id', file_id)
redis:hset(hash..':'..url, 'last_modified', last_modified)
-- Why do we set a TTL? Because Telegram recycles outgoing file_id's
-- See: https://core.telegram.org/bots/faq#can-i-count-on-file-ids-to-be-persistent
redis:expire(hash..':'..url, 5259600) -- 2 months
end
function get_last_modified_header(url)
local doer = HTTP
local do_redir = true
if url:match('^https') then
doer = HTTPS
do_redir = false
end
local _, code, header = doer.request {
method = "HEAD",
url = url,
redirect = do_redir
}
if not header then return end
if header["last-modified"] then
last_modified = header["last-modified"]
elseif header["Last-Modified"] then
last_modified = header["Last-Modified"]
end
return last_modified, code
end
-- only url is needed!
function get_cached_file(url, file_name, receiver, chat_action, self)
local hash = 'telegram:cache:sent_file'
local cached_file_id = redis:hget(hash..':'..url, 'file_id')
local cached_last_modified = redis:hget(hash..':'..url, 'last_modified')
-- get last-modified header
local last_modified, code = get_last_modified_header(url)
if code ~= 200 then
if cached_file_id then
redis:del(hash..':'..url)
end
return
end
if not last_modified then
nocache = true
else
nocache = false
end
if receiver and chat_action and self then
utilities.send_typing(self, receiver, chat_action)
end
if not nocache then
if last_modified == cached_last_modified then
print('File not modified and already cached')
nocache = true
file = cached_file_id
else
print('File cached, but modified or not already cached. (Re)downloading...')
file = download_to_file(url, file_name)
end
else
print('No Last-Modified header!')
file = download_to_file(url, file_name)
end
return file, last_modified, nocache
end
-- converts total amount of seconds (e.g. 65 seconds) to human redable time (e.g. 1:05 minutes)
function makeHumanTime(totalseconds)
local seconds = totalseconds % 60
local minutes = math.floor(totalseconds / 60)
local minutes = minutes % 60
local hours = math.floor(totalseconds / 3600)
if minutes == 00 and hours == 00 then
return seconds..' Sekunden'
elseif hours == 00 and minutes ~= 00 then
return string.format("%02d:%02d", minutes, seconds)..' Minuten'
elseif hours ~= 00 then
return string.format("%02d:%02d:%02d", hours, minutes, seconds)..' Stunden'
end
end
function is_blacklisted(msg)
_blacklist = redis:smembers("telegram:img_blacklist")
local var = false
for v,word in pairs(_blacklist) do
if string.find(string.lower(msg), string.lower(word)) then
print("Wort steht auf der Blacklist!")
var = true
break
end
end
return var
end
function unescape(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+);', function(n) return string.char(n) end )
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 url_encode(str)
if (str) then
str = string.gsub (str, "\n", "\r\n")
str = string.gsub (str, "([^%w %-%_%.%~])",
function (c) return string.format ("%%%02X", string.byte(c)) end)
str = string.gsub (str, " ", "+")
end
return str
end
function table.contains(table, element)
for _, value in pairs(table) do
if value == element then
return true
end
end
return false
end
return utilities