1003 lines
26 KiB
Lua
1003 lines
26 KiB
Lua
--[[
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utilities.lua
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Functions shared among otouto plugins.
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Copyright 2016 topkecleon <drew@otou.to>
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Affero General Public License version 3 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
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for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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]]--
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local utilities = {}
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utf8 = require('lua-utf8')
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ltn12 = require('ltn12')
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http = require('socket.http')
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https = require('ssl.https')
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socket = require('socket')
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URL = require('socket.url')
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json = require("dkjson")
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pcall(json.use_lpeg)
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serpent = require("serpent")
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redis = (loadfile "./otouto/redis.lua")()
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OAuth = require "OAuth"
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helpers = require "OAuth.helpers"
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http.TIMEOUT = 10
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https.TIMEOUT = 10
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-- For the sake of ease to new contributors and familiarity to old contributors,
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-- we'll provide a couple of aliases to real bindings here.
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function utilities.send_message(chat_id, text, disable_web_page_preview, reply_to_message_id, use_markdown, reply_markup)
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local parse_mode
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if type(use_markdown) == 'string' then
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parse_mode = use_markdown
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elseif use_markdown == true then
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parse_mode = 'markdown'
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end
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return bindings.request(
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'sendMessage',
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{
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chat_id = chat_id,
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text = text,
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disable_web_page_preview = disable_web_page_preview,
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reply_to_message_id = reply_to_message_id,
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parse_mode = parse_mode,
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reply_markup = reply_markup
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}
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)
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end
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-- https://core.telegram.org/bots/api#editmessagetext
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function utilities.edit_message(chat_id, message_id, text, disable_web_page_preview, use_markdown, reply_markup)
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local parse_mode
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if type(use_markdown) == 'string' then
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parse_mode = use_markdown
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elseif use_markdown == true then
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parse_mode = 'Markdown'
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end
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return bindings.request(
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'editMessageText',
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{
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chat_id = chat_id,
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message_id = message_id,
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text = text,
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disable_web_page_preview = disable_web_page_preview,
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parse_mode = parse_mode,
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reply_markup = reply_markup
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}
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)
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end
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function utilities.delete_message(chat_id, message_id)
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return utilities.edit_message(chat_id, message_id, '<i>Gelöschte Nachricht</i>', true, 'HTML')
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end
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function utilities.send_reply(msg, text, use_markdown, reply_markup)
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local parse_mode
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if type(use_markdown) == 'string' then
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parse_mode = use_markdown
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elseif use_markdown == true then
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parse_mode = 'markdown'
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end
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return bindings.request(
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'sendMessage',
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{
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chat_id = msg.chat.id,
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text = text,
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disable_web_page_preview = true,
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reply_to_message_id = msg.message_id,
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parse_mode = parse_mode,
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reply_markup = reply_markup
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}
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)
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end
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-- NOTE: Telegram currently only allows file uploads up to 50 MB
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-- https://core.telegram.org/bots/api#sendphoto
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function utilities.send_photo(chat_id, file, text, reply_to_message_id, reply_markup)
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if not file then return false end
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local output = bindings.request(
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'sendPhoto',
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{
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chat_id = chat_id,
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caption = text or nil,
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reply_to_message_id = reply_to_message_id,
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reply_markup = reply_markup
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},
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{
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photo = file
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}
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)
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if string.match(file, '/tmp/') then
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os.remove(file)
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print("Deleted: "..file)
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end
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return output
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end
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-- https://core.telegram.org/bots/api#sendaudio
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function utilities.send_audio(chat_id, file, reply_to_message_id, duration, performer, title)
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if not file then return false end
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local output = bindings.request(
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'sendAudio',
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{
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chat_id = chat_id,
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duration = duration or nil,
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performer = performer or nil,
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title = title or nil,
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reply_to_message_id = reply_to_message_id
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},
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{
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audio = file
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}
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)
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if string.match(file, '/tmp/') then
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os.remove(file)
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print("Deleted: "..file)
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end
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return output
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end
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-- https://core.telegram.org/bots/api#senddocument
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function utilities.send_document(chat_id, file, text, reply_to_message_id, reply_markup)
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if not file then return false end
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local output = bindings.request(
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'sendDocument',
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{
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chat_id = chat_id,
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caption = text or nil,
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reply_to_message_id = reply_to_message_id,
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reply_markup = reply_markup
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},
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{
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document = file
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}
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)
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if string.match(file, '/tmp/') then
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os.remove(file)
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print("Deleted: "..file)
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end
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return output
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end
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-- https://core.telegram.org/bots/api#sendvideo
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function utilities.send_video(chat_id, file, text, reply_to_message_id, duration, width, height)
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if not file then return false end
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local output = bindings.request(
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'sendVideo',
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{
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chat_id = chat_id,
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caption = text or nil,
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duration = duration or nil,
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width = width or nil,
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height = height or nil,
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reply_to_message_id = reply_to_message_id
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},
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{
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video = file
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}
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)
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if string.match(file, '/tmp/') then
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os.remove(file)
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print("Deleted: "..file)
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end
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return output
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end
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-- NOTE: Voice messages are .ogg files encoded with OPUS
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-- https://core.telegram.org/bots/api#sendvoice
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function utilities.send_voice(chat_id, file, reply_to_message_id, duration)
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if not file then return false end
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local output = bindings.request(
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'sendVoice',
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{
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chat_id = chat_id,
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duration = duration or nil,
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reply_to_message_id = reply_to_message_id
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},
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{
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voice = file
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}
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)
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if string.match(file, '/tmp/') then
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os.remove(file)
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print("Deleted: "..file)
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end
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return output
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end
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-- https://core.telegram.org/bots/api#sendlocation
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function utilities.send_location(chat_id, latitude, longitude, reply_to_message_id)
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return bindings.request(
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'sendLocation',
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{
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chat_id = chat_id,
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latitude = latitude,
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longitude = longitude,
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reply_to_message_id = reply_to_message_id
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}
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)
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end
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-- NOTE: Venue is different from location: it shows information, such as the street adress or
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-- title of the location with it.
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-- https://core.telegram.org/bots/api#sendvenue
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function utilities.send_venue(chat_id, latitude, longitude, reply_to_message_id, title, address)
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return bindings.request(
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'sendVenue',
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{
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chat_id = chat_id,
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latitude = latitude,
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longitude = longitude,
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title = title,
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address = address,
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reply_to_message_id = reply_to_message_id
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}
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)
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end
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-- https://core.telegram.org/bots/api#sendchataction
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function utilities.send_typing(chat_id, action)
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return bindings.request(
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'sendChatAction',
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{
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chat_id = chat_id,
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action = action
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}
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)
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end
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-- https://core.telegram.org/bots/api#answercallbackquery
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function utilities.answer_callback_query(callback, text, show_alert)
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return bindings.request(
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'answerCallbackQuery',
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{
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callback_query_id = callback.id,
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text = text,
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show_alert = show_alert
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}
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)
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end
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-- https://core.telegram.org/bots/api#getchat
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function utilities.get_chat_info(chat_id)
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return bindings.request(
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'getChat',
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{
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chat_id = chat_id
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}
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)
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end
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-- https://core.telegram.org/bots/api#getchatadministrators
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function utilities.get_chat_administrators(chat_id)
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return bindings.request(
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'getChatAdministrators',
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{
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chat_id = chat_id
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}
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)
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end
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-- https://core.telegram.org/bots/api#answerinlinequery
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function utilities.answer_inline_query(inline_query, results, cache_time, is_personal, next_offset, switch_pm_text, switch_pm_parameter)
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return bindings.request(
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'answerInlineQuery',
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{
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inline_query_id = inline_query.id,
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results = results,
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cache_time = cache_time,
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is_personal = is_personal,
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next_offset = next_offset,
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switch_pm_text = switch_pm_text,
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switch_pm_parameter = switch_pm_parameter
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}
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)
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end
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function abort_inline_query(inline_query)
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return bindings.request(
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'answerInlineQuery',
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{
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inline_query_id = inline_query.id,
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cache_time = 5,
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is_personal = true
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}
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)
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end
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-- get the indexed word in a string
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function utilities.get_word(s, i)
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s = s or ''
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i = i or 1
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local n = 0
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for w in s:gmatch('%g+') do
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n = n + 1
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if n == i then return w end
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end
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return false
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end
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-- Returns the string after the first space.
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function utilities.input(s)
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if not s:find(' ') then
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return false
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end
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return s:sub(s:find(' ')+1)
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end
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function utilities.input_from_msg(msg)
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return utilities.input(msg.text) or (msg.reply_to_message and #msg.reply_to_message.text > 0 and msg.reply_to_message.text) or false
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end
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-- Trims whitespace from a string.
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function utilities.trim(str)
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local s = str:gsub('^%s*(.-)%s*$', '%1')
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return s
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end
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-- Returns true if the string is blank/empty
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function string:isempty()
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self = utilities.trim(self)
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return self == nil or self == ''
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end
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function get_name(msg)
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local name = msg.from.first_name
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if not name then
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name = msg.from.id
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end
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return name
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end
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-- http://www.lua.org/manual/5.2/manual.html#pdf-io.popen
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function run_command(str)
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local cmd = io.popen(str)
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local result = cmd:read('*all')
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cmd:close()
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return result
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end
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function convert_timestamp(timestamp, date_format)
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return os.date(date_format, timestamp)
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end
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-- Saves file to $HOME/tmp/. If file_name isn't provided,
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-- will get the text after the last "/" for filename
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-- and content-type for extension
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function download_to_file(url, file_name)
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print('url to download: '..url)
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if not file_name then
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file_name = '/tmp/' .. url:match('.+/(.-)$') or '/tmp/' .. os.time()
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else
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file_name = '/tmp/' .. file_name
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end
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local body = {}
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local doer = http
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local do_redir = true
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if url:match('^https') then
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doer = https
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do_redir = false
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end
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local _, res = doer.request{
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url = url,
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sink = ltn12.sink.table(body),
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redirect = do_redir
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}
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if res ~= 200 then return false end
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local file = io.open(file_name, 'w+')
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file:write(table.concat(body))
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file:close()
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print('Saved to: '..file_name)
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return file_name
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end
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function vardump(value)
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print(serpent.block(value, {comment=false}))
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end
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-- Loads a JSON file as a table.
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function utilities.load_data(filename)
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local f = io.open(filename)
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if f then
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local s = f:read('*all')
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f:close()
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return json.decode(s)
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else
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return {}
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end
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end
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-- Saves a table to a JSON file.
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function utilities.save_data(filename, data)
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local s = json.encode(data)
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local f = io.open(filename, 'w')
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f:write(s)
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f:close()
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end
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-- Returns file size as Integer
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-- See: https://www.lua.org/pil/21.3.html
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function get_file_size(file)
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local current = file:seek() -- get current position
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local size = file:seek("end") -- get file size
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file:seek("set", current) -- restore position
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return tonumber(size)
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end
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-- Gets coordinates for a location. Used by gMaps.lua, time.lua, weather.lua.
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function utilities.get_coords(input, config)
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local url = 'https://maps.googleapis.com/maps/api/geocode/json?address='..URL.escape(input)..'&language=de'
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local jstr, res = https.request(url)
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if res ~= 200 then
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return config.errors.connection
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end
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local jdat = json.decode(jstr)
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if jdat.status == 'ZERO_RESULTS' then
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return config.errors.results
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end
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return {
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lat = jdat.results[1].geometry.location.lat,
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lon = jdat.results[1].geometry.location.lng,
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addr = jdat.results[1].formatted_address
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}
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end
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-- Get the number of values in a key/value table.
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function utilities.table_size(tab)
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local i = 0
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for _,_ in pairs(tab) do
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i = i + 1
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end
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return i
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end
|
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|
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-- Just an easy way to get a user's full name.
|
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-- Alternatively, abuse it to concat two strings like I do.
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function utilities.build_name(first, last)
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if last then
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return first .. ' ' .. last
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else
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return first
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end
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end
|
||
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function utilities:handle_exception(err, message, log_chat)
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local output = string.format(
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'[%s]\n%s: %s\n%s\n',
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os.date('%F %T'),
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self.info.username,
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err or '',
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message
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)
|
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if log_chat then
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output = '<code>' .. utilities.html_escape(output) .. '</code>'
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return utilities.send_message(log_chat, output, true, nil, 'html')
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else
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print(output)
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end
|
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|
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end
|
||
|
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function utilities.md_escape(text)
|
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return text:gsub('_', '\\_')
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:gsub('%[', '\\['):gsub('%]', '\\]')
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:gsub('%*', '\\*'):gsub('`', '\\`')
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end
|
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|
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function utilities.html_escape(text)
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return text:gsub('&', '&'):gsub('<', '<'):gsub('>', '>')
|
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end
|
||
|
||
utilities.triggers_meta = {}
|
||
utilities.triggers_meta.__index = utilities.triggers_meta
|
||
function utilities.triggers_meta:t(pattern, has_args)
|
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local username = self.username:lower()
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table.insert(self.table, '^'..self.cmd_pat..pattern..'$')
|
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table.insert(self.table, '^'..self.cmd_pat..pattern..'@'..username..'$')
|
||
if has_args then
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||
table.insert(self.table, '^'..self.cmd_pat..pattern..'%s+[^%s]*')
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table.insert(self.table, '^'..self.cmd_pat..pattern..'@'..username..'%s+[^%s]*')
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end
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return self
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||
end
|
||
|
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function utilities.triggers(username, cmd_pat, trigger_table)
|
||
local self = setmetatable({}, utilities.triggers_meta)
|
||
self.username = username
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||
self.cmd_pat = cmd_pat
|
||
self.table = trigger_table or {}
|
||
return self
|
||
end
|
||
|
||
function utilities.enrich_user(user)
|
||
user.id_str = tostring(user.id)
|
||
user.name = utilities.build_name(user.first_name, user.last_name)
|
||
return user
|
||
end
|
||
|
||
function utilities.enrich_message(msg)
|
||
if not msg.text then msg.text = msg.caption or '' end
|
||
msg.text_lower = msg.text:lower()
|
||
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()
|
||
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
|
||
msg.forward_from = utilities.enrich_user(msg.forward_from)
|
||
end
|
||
if msg.new_chat_member then
|
||
msg.new_chat_member = utilities.enrich_user(msg.new_chat_member)
|
||
end
|
||
if msg.left_chat_member then
|
||
msg.left_chat_member = utilities.enrich_user(msg.left_chat_member)
|
||
end
|
||
return msg
|
||
end
|
||
|
||
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 = '—',
|
||
utf_8 = '[%z\1-\127\194-\244][\128-\191]',
|
||
}
|
||
|
||
-- 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 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 service_modify_msg(msg)
|
||
if msg.new_chat_member then
|
||
msg.text = '//tgservice new_chat_member'
|
||
msg.text_lower = msg.text
|
||
elseif msg.left_chat_member then
|
||
msg.text = '//tgservice left_chat_member'
|
||
msg.text_lower = msg.text
|
||
elseif msg.new_chat_title then
|
||
msg.text = '//tgservice new_chat_title'
|
||
msg.text_lower = msg.text
|
||
elseif msg.new_chat_photo then
|
||
msg.text = '//tgservice new_chat_photo'
|
||
msg.text_lower = msg.text
|
||
elseif msg.group_chat_created then
|
||
msg.text = '//tgservice group_chat_created'
|
||
msg.text_lower = msg.text
|
||
elseif msg.supergroup_chat_created then
|
||
msg.text = '//tgservice supergroup_chat_created'
|
||
msg.text_lower = msg.text
|
||
elseif msg.channel_chat_created then
|
||
msg.text = '//tgservice channel_chat_created'
|
||
msg.text_lower = msg.text
|
||
elseif msg.migrate_to_chat_id then
|
||
msg.text = '//tgservice migrate_to_chat_id'
|
||
msg.text_lower = msg.text
|
||
elseif msg.migrate_from_chat_id then
|
||
msg.text = '//tgservice migrate_from_chat_id'
|
||
msg.text_lower = msg.text
|
||
end
|
||
return msg
|
||
end
|
||
|
||
function is_service_msg(msg)
|
||
local var = false
|
||
if msg.new_chat_member then
|
||
var = true
|
||
elseif msg.left_chat_member then
|
||
var = true
|
||
elseif msg.new_chat_title then
|
||
var = true
|
||
elseif msg.new_chat_photo then
|
||
var = true
|
||
elseif msg.group_chat_created then
|
||
var = true
|
||
elseif msg.supergroup_chat_created then
|
||
var = true
|
||
elseif msg.channel_chat_created then
|
||
var = true
|
||
elseif msg.migrate_to_chat_id then
|
||
var = true
|
||
elseif msg.migrate_from_chat_id then
|
||
var = true
|
||
end
|
||
return var
|
||
end
|
||
|
||
-- Make a POST request
|
||
-- URL = obvious
|
||
-- Arguments = Things, that go into the body. If sending a file, use 'io.open('path/to/file', "r")'
|
||
-- Headers = Header table. If not set, we will set a few!
|
||
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
|
||
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
|
||
if type(arguments) == 'userdata' then
|
||
request_constructor.headers["Content-Length"] = get_file_size(source)
|
||
request_constructor.source = ltn12.source.file(source)
|
||
else
|
||
request_constructor.headers["Content-Length"] = tostring(#source)
|
||
request_constructor.source = ltn12.source.string(source)
|
||
end
|
||
|
||
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
|
||
|
||
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.starts(String,Start)
|
||
return string.sub(String,1,string.len(Start))==Start
|
||
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, hash_field)
|
||
-- How to: cache_data(pluginname, query_name, data_to_cache, expire_in_seconds, type, hash_field (if hash))
|
||
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
|
||
elseif result.result.sticker then
|
||
file_id = result.result.sticker.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_http_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
|
||
return header, code
|
||
end
|
||
|
||
-- checks with If-Modified-Since header, if url has been changed
|
||
-- URL and Last-Modified heder are required
|
||
function was_modified_since(url, last_modified)
|
||
local doer = http
|
||
local do_redir = true
|
||
if url:match('^https') then
|
||
doer = https
|
||
do_redir = false
|
||
end
|
||
local _, code, header = doer.request {
|
||
url = url,
|
||
method = "HEAD",
|
||
redirect = do_redir,
|
||
headers = {
|
||
["If-Modified-Since"] = last_modified
|
||
}
|
||
}
|
||
if code == 304 then
|
||
return false, nil, code
|
||
else
|
||
if header["last-modified"] then
|
||
new_last_modified = header["last-modified"]
|
||
elseif header["Last-Modified"] then
|
||
new_last_modified = header["Last-Modified"]
|
||
end
|
||
return true, new_last_modified, code
|
||
end
|
||
end
|
||
|
||
-- only url is needed!
|
||
function get_cached_file(url, file_name, receiver, chat_action)
|
||
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')
|
||
|
||
if cached_last_modified then
|
||
was_modified, new_last_modified, code = was_modified_since(url, cached_last_modified)
|
||
if not was_modified then
|
||
print('File wasn\'t modified, skipping download...')
|
||
return cached_file_id, nil, true
|
||
else
|
||
if code ~= 200 then
|
||
redis:del(hash..':'..url)
|
||
return
|
||
end
|
||
print('File was modified, redownloading...')
|
||
if receiver and chat_action then
|
||
utilities.send_typing(receiver, chat_action)
|
||
end
|
||
file = download_to_file(url, file_name)
|
||
return file, new_last_modified, false
|
||
end
|
||
end
|
||
|
||
-- get last-modified and Content-Length header
|
||
local header, code = get_http_header(url)
|
||
|
||
-- file size limit is 50 MB
|
||
if header then
|
||
|
||
if header["Content-Length"] then
|
||
if tonumber(header["Content-Length"]) > 52420000 then
|
||
print('file is too large, won\'t send!')
|
||
return nil
|
||
end
|
||
elseif header["content-length"] then
|
||
if tonumber(header["content-length"]) > 52420000 then
|
||
print('file is too large, won\'t send!')
|
||
return nil
|
||
end
|
||
end
|
||
|
||
if header["last-modified"] then
|
||
last_modified = header["last-modified"]
|
||
elseif header["Last-Modified"] then
|
||
last_modified = header["Last-Modified"]
|
||
end
|
||
|
||
else
|
||
last_modified = nil
|
||
end
|
||
|
||
if not last_modified then
|
||
nocache = true
|
||
else
|
||
nocache = false
|
||
end
|
||
|
||
if receiver and chat_action then
|
||
utilities.send_typing(receiver, chat_action)
|
||
end
|
||
|
||
if not nocache then
|
||
file = download_to_file(url, file_name)
|
||
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
|
||
if seconds == 1 then
|
||
return seconds..' Sekunde'
|
||
else
|
||
return seconds..' Sekunden'
|
||
end
|
||
elseif hours == 00 and minutes ~= 00 then
|
||
if minutes == 1 then
|
||
return string.format("%02d:%02d", minutes, seconds)..' Minute'
|
||
else
|
||
return string.format("%02d:%02d", minutes, seconds)..' Minuten'
|
||
end
|
||
elseif hours ~= 00 then
|
||
if hours == 1 then
|
||
return string.format("%02d:%02d:%02d", hours, minutes, seconds)..' Stunde'
|
||
else
|
||
return string.format("%02d:%02d:%02d", hours, minutes, seconds)..' Stunden'
|
||
end
|
||
end
|
||
end
|
||
|
||
function unescape(str)
|
||
str = string.gsub( str, '<', '<' )
|
||
str = string.gsub( str, '>', '>' )
|
||
str = string.gsub( str, '"', '"' )
|
||
str = string.gsub( str, ''', "'" )
|
||
str = string.gsub( str, "Ä", "Ä")
|
||
str = string.gsub( str, "ä", "ä")
|
||
str = string.gsub( str, "Ö", "Ö")
|
||
str = string.gsub( str, "ö", "ö")
|
||
str = string.gsub( str, "Uuml;", "Ü")
|
||
str = string.gsub( str, "ü", "ü")
|
||
str = string.gsub( str, "ß", "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, '&', '&' ) -- Be sure to do this after all others
|
||
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
|
||
|
||
-- Checks if bot was disabled on specific chat
|
||
function is_channel_disabled(msg)
|
||
local hash = 'chat:'..msg.chat.id..':disabled'
|
||
local disabled = redis:get(hash)
|
||
|
||
if not disabled or disabled == "false" then
|
||
return false
|
||
end
|
||
|
||
return disabled
|
||
end
|
||
|
||
-- Converts a gross string back into proper UTF-8.
|
||
-- Useful for fixing improper encoding caused by bad JSON escaping.
|
||
function utilities.fix_utf8(str)
|
||
return string.char(utf8.codepoint(str, 1, -1))
|
||
end
|
||
|
||
|
||
return utilities |