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Mikubot/bot/utils.lua

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function get_receiver(msg)
if msg.to.type == 'user' then
return 'user#id'..msg.from.id
end
if msg.to.type == 'chat' then
return 'chat#id'..msg.to.id
end
end
function is_chat_msg( msg )
if msg.to.type == 'chat' then
return true
end
return false
end
function string.random(length)
math.randomseed(os.time())
local str = "";
for i = 1, length do
math.random(97, 122)
str = str..string.char(math.random(97, 122));
end
return str;
end
function string:split(sep)
local sep, fields = sep or ":", {}
local pattern = string.format("([^%s]+)", sep)
self:gsub(pattern, function(c) fields[#fields+1] = c end)
return fields
end
function download_to_file( url , noremove )
print("url to download: "..url)
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local ltn12 = require "ltn12"
local respbody = {}
one, c, h = http.request{url=url, sink=ltn12.sink.table(respbody), redirect=true}
htype = h["content-type"]
vardump(c)
print("content-type: "..htype)
if htype == "image/jpeg" then
file_name = string.random(5)..".jpg"
file_path = "/tmp/"..file_name
else
if htype == "image/gif" then
file_name = string.random(5)..".gif"
file_path = "/tmp/"..file_name
else
if htype == "image/png" then
file_name = string.random(5)..".png"
file_path = "/tmp/"..file_name
else
file_name = url:match("([^/]+)$")
file_path = "/tmp/"..file_name
end
end
end
file = io.open(file_path, "w+")
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file:write(table.concat(respbody))
file:close()
if noremove == nil then
print(file_path.."will be removed in 20 seconds")
postpone(rmtmp_cb, file_path, 20)
end
return file_path
end
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-- Callback to remove a file
function rmtmp_cb(file_path, success, result)
os.remove(file_path)
end
function vardump(value, depth, key)
local linePrefix = ""
local spaces = ""
if key ~= nil then
linePrefix = "["..key.."] = "
end
if depth == nil then
depth = 0
else
depth = depth + 1
for i=1, depth do spaces = spaces .. " " end
end
if type(value) == 'table' then
mTable = getmetatable(value)
if mTable == nil then
print(spaces ..linePrefix.."(table) ")
else
print(spaces .."(metatable) ")
value = mTable
end
for tableKey, tableValue in pairs(value) do
vardump(tableValue, depth, tableKey)
end
elseif type(value) == 'function' or
type(value) == 'thread' or
type(value) == 'userdata' or
value == nil
then
print(spaces..tostring(value))
else
print(spaces..linePrefix.."("..type(value)..") "..tostring(value))
end
end
-- 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
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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
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function is_sudo(msg)
local var = false
-- Check users id in config
for v,user in pairs(_config.sudo_users) do
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if user == msg.from.id then
var = true
end
end
return var
end
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-- Returns the name of the sender
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function get_name(msg)
local name = msg.from.first_name
if name == nil then
name = msg.from.id
end
return name
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end
-- Returns at table of lua files inside plugins
function plugins_names( )
local files = {}
for k, v in pairs(scandir("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
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end
-- Save into file the data serialized for lua.
function serialize_to_file(data, file)
file = io.open(file, 'w+')
local serialized = serpent.block(data, {
comment = false,
name = "_"
})
file:write(serialized)
file:close()
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end
-- Retruns true if the string is empty
function string:isempty()
return self == nil or self == ''
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end