commit 30f7203c5fe69e875dbd29a4da9fe0c5ab1ddc9b
Author: Er2 <er2@dismail.de>
Date:   Mon Aug 16 11:47:49 2021 +0300

    move from bot

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..41c51bc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+# Emacs
+*~
+\#*#
+
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e241737
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+Zlib License
+
+Copyright (c) 2021 Er2 <er2@dismail.de>
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgement in the product documentation would be
+   appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
diff --git a/api.lua b/api.lua
new file mode 100644
index 0000000..56ed3dc
--- /dev/null
+++ b/api.lua
@@ -0,0 +1,137 @@
+--[[ API Library
+  -- (c) Er2 2021 <er2@dismail.de>
+  -- Zlib License
+--]]
+
+local tools  = require 'api.tools'
+local json   = require 'json'
+local events = require 'events'
+local api    = {
+  request    = function(s, ...) return tools.request(s.token, ...) end
+}
+api.__index = api -- Make class
+events(api)       -- inheritance
+
+-- parse arguments
+local function argp(cid, rmp, pmod, dwp)
+  return
+    type(cid) == 'table' and cid.chat.id or cid,
+    type(rmp) == 'table' and json.encode(rmp) or rmp,
+    (type(pmod) == 'boolean' and pmod == true) and 'MarkdownV2' or pmod,
+    dwp == nil and true or dwp
+end
+
+-- Getters without params
+
+function api:getMe() return self:request 'getMe' end
+function api:getMyCommands() return self:request 'getMyCommands' end
+
+-- Getters with params
+
+function api:getChat(cid) return self:request('getChat', {chat_id = cid}) end
+
+-- Setters
+
+function api:send(msg, txt, pmod, dwp, dnot, rtmid, rmp)
+  msg, rmp, pmod, dwp = argp(msg, rmp, pmod, dwp)
+
+  if txt and #txt >= 4096 then
+    txt = txt:sub(0, 4092) .. '...'
+  end
+
+  return self:request('sendMessage', {
+    chat_id = msg,
+    text = txt,
+    parse_mode = pmod,
+    disable_web_page_preview = dwp,
+    disable_notification = dnot,
+    reply_to_message_id = rtmid,
+    reply_markup = rmp,
+  })
+end
+
+function api:reply(msg, txt, pmod, dwp, rmp, dnot)
+  _, rmp, pmod, dwp = argp(msg, rmp, pmod, dwp)
+  return self:request('sendMessage', {
+    chat_id = msg.chat.id,
+    text = txt,
+    parse_mode = pmod,
+    disable_web_page_preview = dwp,
+    disable_notification = dnot,
+    reply_to_message_id = msg.message_id,
+    reply_markup = rmp,
+  })
+end
+
+function api:forward(cid, frcid, mid, dnot)
+  return self:request('forwardMessage', {
+    chat_id = cid,
+    from_chat_id = frcid,
+    disable_notification = dnot,
+    message_id = mid,
+  })
+end
+
+function api:sendPhoto(cid, f, cap, pmod, dnot, rtmid, rmp)
+  cid, rmp, pmod = argp(cid, rmp, pmod)
+  return self:request('sendPhoto', {
+    chat_id = cid,
+    caption = cap,
+    parse_mode = pmod,
+    disable_notification = dnot,
+    reply_to_message_id = rtmid,
+    reply_markup = rmp,
+  }, { photo = f })
+end
+
+function api:sendDocument(cid, f, cap, pmod, dnot, rtmid, rmp)
+  cid, rmp, pmod = argp(cid, rmp, pmod)
+  return self:request('sendDocument', {
+    chat_id = cid,
+    caption = cap,
+    parse_mode = pmod,
+    disable_notification = dnot,
+    reply_to_message_id = rtmid,
+    reply_markup = rmp,
+  }, { document = f })
+end
+
+function api:sendPoll(cid, q, opt, anon, ptype, mansw, coptid, expl, pmode, oper, cdate, closed, dnot, rtmid, rmp)
+  cid, rmp, pmode = argp(cid, rmp, pmode)
+  opt = type(opt) == 'string' and opt or json.encode(opt)
+  anon = type(anon) == 'boolean' and anon or false
+  mansw = type(mansw) == 'boolean' and mansw or false
+  return self:request('sendPoll', {
+    chat_id = cid,
+    question = q,
+    options = opt,
+    is_anonymous = anon,
+    type = ptype,
+    allows_multiple_answers = mansw,
+    correct_option_id = coptid,
+    explanation = expl,
+    explanation_parse_mode = pmode,
+    open_period = oper,
+    close_date = cdate,
+    is_closed = closed,
+    disable_notification = dnot,
+    reply_to_message_id = rtmid,
+    reply_markup = rmp,
+  })
+end
+
+function api:answerCallback(id, txt, alrt, url, ctime)
+  return self:request('answerCallbackQuery', {
+    callback_query_id = id,
+    text = txt,
+    show_alert = alrt,
+    url = url,
+    cache_time = ctime,
+  })
+end
+
+function api:setMyCommands(cmds)
+  return self:request('setMyCommands', { commands = json.encode(cmds) })
+end
+
+return api
diff --git a/core.lua b/core.lua
new file mode 100644
index 0000000..04baaf5
--- /dev/null
+++ b/core.lua
@@ -0,0 +1,133 @@
+--[[ Core file
+  -- (c) Er2 2021 <er2@dismail.de>
+  -- Zlib License
+--]]
+
+local tools = require 'api.tools'
+local api   = require 'api.api'
+api.__index = api
+
+function api:_ev(t, i, name, ...)
+  local v = t[i]
+  if v.name == name then
+    v.fn(self, ...)
+    if v.type == 'once' then table.remove(t, i) end
+  end
+end
+
+-- UPDATES --
+function api:getUpdates(lim, offs, tout, allowed)
+  allowed = type(allowed) == 'table' and tools.json.encode(allowed) or allowed
+  return self:request('getUpdates', {
+    timeout = tout,
+    offset = offs,
+    limit = lim,
+    allowed_updates = allowed
+  })
+end
+
+local function receiveUpdate(self, update)
+  if update.message then
+    local msg = update.message
+    local cmd, to = tools.fetchCmd(msg.text or '')
+    if cmd and (not to or to == self.info.username) then
+      -- need /cmd@bot in groups
+      if (msg.chat.type == 'group' or msg.chat.type == 'supergroup')
+       and not to then return end
+
+      local args = {}
+      msg.text = msg.text:sub(#cmd + #(to or '') + 3)
+      for s in msg.text:gmatch '%S+' do table.insert(args, s) end
+
+      msg.cmd  = cmd
+      msg.args = args
+
+      return self:emit('command', msg)
+    elseif cmd then return end
+
+    self:emit('message', msg)
+
+  elseif update.edited_message then
+    self:emit('messageEdit', update.edited_message)
+
+  elseif update.channel_post then self:emit('channelPost', update.channel_post)
+  elseif update.edited_channel_post then self:emit('channelPostEdit', update.edited_channel_post)
+
+  elseif update.poll then self:emit('poll', update.poll)
+  elseif update.poll_answer then self:emit('pollAnswer', update.poll_answer)
+
+  elseif update.callback_query then self:emit('callbackQuery', update.callback_query)
+  elseif update.inline_query then self:emit('inlineQuery', update.inline_query)
+  elseif update.shipping_query then self:emit('shippingQuery', update.shipping_query)
+  elseif update.pre_checkout_query then self:emit('preCheckoutQuery', update.pre_checkout_query)
+
+  elseif update.chosen_inline_result then self:emit('inlineResult', update.chosen_inline_result)
+  end
+end
+
+function api:_getUpd(lim, offs, ...)
+  local u, ok = self:getUpdates(lim, offs, ...)
+  if not ok or not u or (u and type(u) ~= 'table') or not u.result then return end
+  for _, v in pairs(u.result) do
+    offs = v.update_id + 1
+    if type(v) == 'table' then
+      self:emit('update', v)
+      receiveUpdate(self, v)
+    end
+  end
+  return offs
+end
+
+function api:_loop(lim, offs, ...)
+  while api.runs do
+    local o = self:_getUpd(lim, offs, ...)
+    offs = o and o or offs
+  end
+  self:getUpdates(lim, offs, ...)
+end
+
+-- RUN --
+function api:run(lim, offs, tout, al)
+  lim = tonumber(lim) or 1
+  offs = tonumber(offs) or 0
+  tout = tonumber(tout) or 0
+
+  self.runs = true
+  self:emit 'ready'
+
+  self.co = coroutine.create(api._loop)
+  coroutine.resume(self.co, self, lim, tout, offs, al)
+end
+
+function api:destroy() self.runs = false end
+
+function api:login(token, thn)
+  self.token = assert(token or self.token, 'Provide token!')
+
+  repeat
+    local r, o = self:getMe()
+    if o and r then self.info = r end
+  until (self.info or {}).result
+
+  self.info = self.info.result
+  self.info.name = self.info.first_name
+
+  if type(thn) == 'function' then thn(self) end
+
+  if not self.nr then self:run() end
+end
+
+return function(opts)
+  if not token or type(token) ~= 'string' then token = nil end
+
+  local self = setmetatable({}, api)
+  if type(opts) == 'table' then
+    if opts.token then self.token = opts.token end
+    if opts.norun then self.nr = true end
+    if not opts.noinl then
+      self.inline = require('etc.api.inline')(self)
+    end
+  end
+
+  return self
+end
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..065a80f
--- /dev/null
+++ b/init.lua
@@ -0,0 +1 @@
+return require 'api.core'
diff --git a/inline.lua b/inline.lua
new file mode 100644
index 0000000..9c3d11f
--- /dev/null
+++ b/inline.lua
@@ -0,0 +1,156 @@
+--[[ Inline query library
+  -- (c) Er2 2021 <er2@dismail.de>
+  -- Zlib License
+--]]
+
+local inline   = {}
+inline.__index = inline -- Make class
+
+function inline.query(id, from, q, off, ct, loc)
+  return {
+    id = tostring(id),
+    from = from,
+    query = q,
+    offset = off,
+    chat_type = ct,
+    location = loc,
+  }
+end
+
+function inline.result(type, id, ...)
+  type = tostring(type)
+  local t = setmetatable({
+    type = type,
+    id = tostring(tonumber(id) or 1),
+  }, inline)
+  local a = {...}
+  if t.type == 'article' then t.title, t.url, t.hide_url, t.description = table.unpack(a)
+
+  elseif t.type == 'photo' then
+    t.photo_url, t.photo_width, t.photo_height, t.title, t.description,
+    t.caption, t.parse_mode, t.caption_entities
+      = table.unpack(a)
+
+  elseif t.type == 'gif' or t.type == 'mpeg4_gif' then
+    local url, width, height, duration
+    url, width, height, duration, t.title, t.caption, t.parse_mode, t.caption_entities
+      = table.unpack(a)
+
+    if t.type == 'gif' then
+      t.gif_url, t.gif_width, t.gif_height, t.gif_duration
+      = url, width, height, duration
+    else
+      t.mpeg4_url, t.mpeg4_width, t.mpeg4_height, t.mpeg4_duration
+      = url, width, height, duration
+    end
+
+  elseif t.type == 'video' then
+    t.video_url, t.mime_type, t.title, t.caption, t.parse_mode,
+    t.caption_entities, t.video_width, t.video_height, t.video_duration, t.description
+      = table.unpack(a)
+
+  elseif t.type == 'audio' or t.type == 'voice' then
+    t.title, t.caption, t.parse_mode, t.caption_entities = table.unpack(a, 2)
+
+    if t.type == 'audio' then
+      t.audio_url, t.performer, t.audio_duration = a[1], a[6], a[7]
+    else
+      t.voice_url, t.voice_duration = a[1], a[6]
+    end
+
+  elseif t.type == 'document' then
+    t.title, t.caption, t.parse_mode, t.caption_entities, t.document_url,
+    t.mime_type, t.description = table.unpack(a)
+
+  elseif t.type == 'location' or t.type == 'venue' then
+    t.latitude, t.longitude, t.title = table.unpack(a, 1, 3)
+
+    if t.type ~= 'venue' then
+      t.horizontal_accurancy, t.live_period, t.heading, t.proximity_alert_radius
+      = table.unpack(a, 4, 7)
+    else
+      t.address, t.foursquare_id, t.foursquare_type, t.google_place_id, t.google_place_type
+      = table.unpack(a, 4, 8)
+    end
+
+  elseif t.type == 'contact' then
+    t.phone_number, t.first_name, t.last_name, t.vcard,
+    t.reply_markup, t.input_message_content
+      = table.unpack(a)
+
+  elseif t.type == 'game' then t.game_short_name = a[1]
+  end
+
+  return t
+end
+
+function inline:thumb(url, width, height, mime)
+  if self.type == 'audio'
+  or self.type == 'voice'
+  or self.type == 'game'
+  then return self end
+
+  self.thumb_url = tostring(url)
+
+  if  width and height and (
+     self.type == 'article'
+  or self.type == 'document'
+  or self.type == 'contact'
+  or self.type == 'location'
+  or self.type == 'venue'
+  ) then
+    self.thumb_width  = tonumber(width)
+    self.thumb_height = tonumber(height)
+  end
+
+  if mime and (
+     self.type == 'gif'
+  or self.type == 'mpeg4_gif'
+  ) then self.thumb_mime_type = mime end
+
+  return self
+end
+
+function inline:keyboard(...)
+  if not self.type then return self end
+  local k = {}
+
+  for _, v in pairs {...} do
+    if type(v) == 'table' then
+      table.insert(k, v)
+    end
+  end
+  self.reply_markup = k
+
+  return self
+end
+
+-- Author itself not understands why this funciton needed
+-- so not recommends to use it
+function inline:messCont(a)
+  if self.type == 'game' or self.type == 'article' then
+    self.input_message_content = a
+  end
+  return self
+end
+
+function inline:answer(id, res, ctime, per, noff, pmt, pmp)
+   print(dump(res))
+  if res.id then res = {res} end 
+  return self:request('answerInlineQuery', {
+    inline_query_id = id,
+    results = res,
+    cache_time = ctime,
+    is_personal = per,
+    next_offset = noff,
+    switch_pm_text = pmt,
+    switch_pm_parameter = pmp,
+  })
+end
+
+return function(api)
+  local self = setmetatable({
+    request = function(_, ...) api:request(...) end
+  }, inline)
+  return self
+end
diff --git a/multipart.lua b/multipart.lua
new file mode 100644
index 0000000..361470b
--- /dev/null
+++ b/multipart.lua
@@ -0,0 +1,167 @@
+-- based on https://github.com/catwell/lua-multipart-post
+-- MIT License
+
+local ltn12 = require 'ltn12'
+local mp = {
+  CHARSET  = 'UTF-8',
+  LANGUAGE = ''
+}
+
+-- https://gist.github.com/liukun/f9ce7d6d14fa45fe9b924a3eed5c3d99
+local function urlencode(url)
+  if url == nil then return end
+  url = url:gsub("\n", "\r\n")
+  url = url:gsub("([^%w_%- . ~])", function(c) return string.format("%%%02X", string.byte(c)) end)
+  url = url:gsub(" ", "+")
+  return url
+end
+mp.urlencode = urlencode
+
+local function fmt(p, ...)
+  if select('#', ...) == 0 then
+    return p
+  end
+  return string.format(p, ...)
+end
+
+local function tprintf(t, p, ...)
+  t[#t+1] = fmt(p, ...)
+end
+
+local function section_header(r, k, extra)
+  tprintf(r, 'content-disposition: form-data; name="%s"', k)
+  if extra.filename then
+    tprintf(r, '; filename="%s"', extra.filename)
+    tprintf(
+      r, "; filename*=%s'%s'%s",
+      mp.CHARSET, mp.LANGUAGE, urlencode(extra.filename)
+    )
+  end
+  if extra.content_type then
+    tprintf(r, '\r\ncontent-type: %s', extra.content_type)
+  end
+  if extra.content_transfer_encoding then
+    tprintf(
+      r, '\r\ncontent-transfer-encoding: %s',
+      extra.content_transfer_encoding
+    )
+  end
+  tprintf(r, '\r\n\r\n')
+end
+
+function mp.boundary()
+  local t = {"BOUNDARY-"}
+  for i=2,17 do t[i] = string.char(math.random(65, 90)) end
+  t[18] = "-BOUNDARY"
+  return table.concat(t)
+end
+
+local function encode_header_to_table(r, k, v, boundary)
+  local _t = type(v)
+
+  tprintf(r, "--%s\r\n", boundary)
+  if _t == "string" then
+    section_header(r, k, {})
+  elseif _t == "table" then
+    assert(v.data, "invalid input")
+    local extra = {
+      filename = v.filename or v.name,
+      content_type = v.content_type or v.mimetype
+        or "application/octet-stream",
+      content_transfer_encoding = v.content_transfer_encoding
+        or "binary",
+    }
+    section_header(r, k, extra)
+  else
+    error(string.format("unexpected type %s", _t))
+  end
+end
+
+local function encode_header_as_source(k, v, boundary, ctx)
+  local r = {}
+  encode_header_to_table(r, k, v, boundary, ctx)
+  local s = table.concat(r)
+  if ctx then
+    ctx.headers_length = ctx.headers_length + #s
+  end
+  return ltn12.source.string(s)
+end
+
+local function data_len(d)
+  local _t = type(d)
+
+  if _t == "string" then
+    return string.len(d)
+  elseif _t == "table" then
+    if type(d.data) == "string" then
+      return string.len(d.data)
+    end
+    if d.len then return d.len end
+    error("must provide data length for non-string datatypes")
+  end
+end
+
+local function content_length(t, boundary, ctx)
+  local r = ctx and ctx.headers_length or 0
+  for k, v in pairs(t) do
+    if not ctx then
+      local tmp = {}
+      encode_header_to_table(tmp, k, v, boundary)
+      r = r + #table.concat(tmp)
+    end
+    r = r + data_len(v) + 2 -- `\r\n`
+  end
+  return r + #boundary + 6 -- `--BOUNDARY--\r\n`
+end
+
+local function get_data_src(v)
+  local _t = type(v)
+  if v.source then
+    return v.source
+  elseif _t == "string" then
+    return ltn12.source.string(v)
+  elseif _t == "table" then
+    _t = type(v.data)
+    if _t == "string" then
+      return ltn12.source.string(v.data)
+    elseif _t == "table" then
+      return ltn12.source.table(v.data)
+    elseif _t == "userdata" then
+      return ltn12.source.file(v.data)
+    elseif _t == "function" then
+      return v.data
+    end
+  end
+  error("invalid input")
+end
+
+local function set_ltn12_blksz(sz)
+  assert(type(sz) == "number", "set_ltn12_blksz expects a number")
+  ltn12.BLOCKSIZE = sz
+end
+mp.set_ltn12_blksz = set_ltn12_blksz
+
+local function source(t, boundary, ctx)
+  local sources, n = {}, 1
+  for k, v in pairs(t) do
+    sources[n] = encode_header_as_source(k, v, boundary, ctx)
+    sources[n+1] = get_data_src(v)
+    sources[n+2] = ltn12.source.string("\r\n")
+    n = n + 3
+  end
+  sources[n] = ltn12.source.string(string.format("--%s--\r\n", boundary))
+  return ltn12.source.cat(table.unpack(sources))
+end
+mp.source = source
+
+function mp.encode(t, boundary)
+  boundary = boundary or mp.boundary()
+  local r = {}
+  assert(ltn12.pump.all(
+    (source(t, boundary)),
+    (ltn12.sink.table(r))
+  ))
+  return table.concat(r), boundary
+end
+
+return mp
diff --git a/readme.org b/readme.org
new file mode 100644
index 0000000..37ce50f
--- /dev/null
+++ b/readme.org
@@ -0,0 +1,29 @@
+* Telegram API
+
+This is bindings of Telegram API on Lua, part of [[https://gitdab.com/er2/comp-tg][my bot]].
+
+* Installation
+
+We recommended to use *.gitmodules* file for that.
+To include, add to gitmodules this:
+
+#+begin_src
+[submodule "tg-api"]
+	path = # enter your path
+	url = https://gitdab.com/er2/tg-api-lua
+
+#+end_src
+
+Also you need to:
+  + Install *LuaSec* for https requests.
+
+  + Execute this code *before* include this API:
+
+    #+begin_src lua
+      package.path = 'yourpath/?.lua;yourpath/?/init.lua;' .. package.path
+    #+end_src
+
+  + Copy to yourpath +/api+ files *event.lua* and *json.lua*
+
+    They can be taken from [[https://gitdab.com/er2/comp-tg/src/branch/main/etc][here]].
+
diff --git a/tools.lua b/tools.lua
new file mode 100644
index 0000000..54a9801
--- /dev/null
+++ b/tools.lua
@@ -0,0 +1,103 @@
+--[[ Additional tools
+  -- (c) Er2 2021 <er2@dismail.de>
+  -- Zlib license
+--]]
+
+local tools = {
+  json = require 'json',
+}
+
+local json  = tools.json
+local https = require 'ssl.https'
+local ltn12 = require 'ltn12'
+local mp    = require 'api.multipart'
+
+function tools.fetchCmd(text)
+  return
+    text:match '/([%w_]+)',       -- cmd
+    text:match '/[%w_]+@([%w_]+)' -- to
+end
+
+function tools._req(url, meth, data, ctype)
+  assert(url,  'Provide URL!')
+  assert(meth, 'Provide method!')
+
+  local resp = {}
+  local head = {
+    url      = url,
+    method   = meth,
+    headers  = {
+      ['Content-Type']   = ctype,
+      ['Content-Length'] = #(data or ''),
+    },
+    source   = ltn12.source.string(data),
+    sink     = ltn12.sink.table(resp),
+  }
+
+  local succ, res = https.request(head)
+  if not succ then
+    print('Connection error [' .. res .. ']')
+    return nil, false
+  end
+  return resp[1], true
+end
+
+function tools.preq(url, par)
+  par = par or {}
+
+  local body, bound = mp.encode(par)
+  return tools._req(
+    url,
+    'POST',
+    body,
+    'multipart/form-data; boundary=' .. bound
+  )
+end
+
+function tools.greq(url, par, f)
+  par = json.encode(par)
+  return tools._req(url, 'GET', par, 'application/json')
+end
+
+function tools.req(url, par, f, dbg)
+  local res, succ
+  par = par or {}
+
+  -- files
+  if f and next(f) ~= nil then
+    par = par or {}
+    for k, v in pairs(par) do par[k] = tostring(v) end
+    local ft, fn = next(f)
+    local fr = io.open(fn, 'r')
+    if fr then
+      par[ft] = {
+        filename = fn,
+	data = fr:read '*a'
+      }
+      fr:close()
+    else par[ft] = fn end
+    res, succ = tools.preq(url, par)
+  else -- text
+    res, succ = tools.greq(url, par)
+  end
+
+  if dbg then print(url, succ, res, par)
+    -- dump(par))
+  end
+  res = json.decode(res or '{}')
+  if not succ or not res then return {}, false end
+  return res, true
+end
+
+function tools.request(token, endpoint, param, f)
+  assert(token, 'Provide token!')
+  assert(endpoint, 'Provide endpoint!')
+
+  local url = 'https://api.telegram.org/bot' ..token.. '/' ..endpoint
+
+  dbg = true
+  local resp = tools.req(url, param, f, dbg)
+  return resp, resp.ok or false
+end
+
+return tools