#otouto The plugin-wielding, multipurpose Telegram bot.

The public bot runs on @mokubot.

otouto is licensed under the GNU General Public License. A copy of the license has been included in LICENSE.

##What is it? otouto is an independently developed Telegram API bot written in Lua. Originally conceived as a tg-cli script in February of 2015, otouto has since been migrated to the API, open-sourced, and it being developed to this day.

otouto uses a robust plugin system, similar to that of yagop's telegram-bot. The aim of the project is to contain any desirable feature inside one universal bot.

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##Plugins Here is a list of most otouto plugins.

Plugin	Command	Function	Alias
help.lua	/help	Returns a list of commands.	/h
about.lua	/about	Returns the about text as configured in config.lua.
ping.lua	/ping	The simplest plugin ever!
echo.lua	/echo	Repeats a string of text.
gSearch.lua	/google	Returns Google web results.	/g, /gnsfw
gImages.lua	/images	Returns a Google image result.	/i, /insfw
gMaps.lua	/location	Returns location data from Google Maps.	/loc
youtube.lua	/youtube	Returns the top video result from YouTube.	/yt
wikipedia.lua	/wikipedia	Returns the summary of a Wikipedia article.	/wiki
lastfm.lua	/np [username]	Returns the song you are currently listening to.
lastfm.lua	/fmset [username]	Sets your username for /np. /fmset - will delete it.
hackernews.lua	/hackernews	Returns the latest posts from Hacker News.	/hn
imdb.lua	/imdb	Returns film information from IMDb.
hearthstone.lua	/hearthstone	Returns data for Hearthstone cards matching the query.	/hs
calc.lua	/calc	Returns solutions to math expressions and conversions between common units.
bible.lua	/bible	Returns a Bible verse.	/b
urbandictionary.lua	/urbandictionary	Returns the top definition from Urban Dictionary.	/ud, /urban
time.lua	/time	Returns the time, date, and a timezone for a location.
weather.lua	/weather	Returns current weather conditions for a given location.
nick.lua	/nick	Set your nickname. /nick - will delete it.
whoami.lua	/whoami	Returns user and chat info for you or the replied-to user.	/who
eightball.lua	/8ball	Returns an answer from a magic 8-ball.
dice.lua	/roll	Returns RNG dice rolls. Uses D&D notation.
reddit.lua	/reddit [r/subreddit | query]	Returns the top results from a given subreddit, query, or r/all.	/r
xkcd.lua	/xkcd [query]	Returns an xkcd strip and its alt text.
slap.lua	/slap	Gives someone a slap (or worse).
commit.lua	/commit	Returns a commit message from whatthecommit.com.
fortune.lua	/fortune	Returns a UNIX fortune.
pun.lua	/pun	Returns a pun.
pokedex.lua	/pokedex	Returns a Pokedex entry.	/dex
currency.lua	/cash [amount] to	Converts one currency to another.
cats.lua	/cat	Returns a cat picture.
reactions.lua	/reactions	Returns a list of reaction emoticons which can be used through the bot.
control.lua	/reload	Reloads all plugins, libraries, and configuration files.
control.lua	/halt	Stops the bot. If the bot was run with launch.sh, this will restart it.
blacklist.lua	/blacklist	Blacklists or unblacklists a user, via reply or ID, from using your bot.
shell.lua	/shell	Runs a shell command and returns the output. Use with caution.
luarun.lua	/lua	Runs a string a Lua code and returns the output, if applicable. Use with caution. otouto does not use a sandbox.

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##Liberbot Plugins Some plugins are only useful when the bot is used in a Liberbot group, like floodcontrol.lua and moderation.lua.

floodcontrol.lua makes the bot compliant with Liberbot's floodcontrol function. When the bot has posted too many messages to a single group in a given period of time, Liberbot will send it a message telling it to cease posting in that group. Here is an example floodcontrol command:

/floodcontrol {"groupid":987654321,"duration":600}

The bot will accept these commands from both Liberbot and the configured administrator.

moderation.lua allows the owner to use the bot to moderate a Liberbot realm, or set of groups. This works by adding the bot to the realm's admin group and making it an administrator.

You must configure the plugin in the "moderation" section of config.lua, in the following way:

moderation = {
    admins = {
        ['123456789'] = 'Adam',
        ['246813579'] = 'Eve'
    },
    admin_group = -987654321,
    realm_name = 'My Realm'
}

Where Adam and Eve are realm administrators, and their IDs are set as their keys in the form of strings. admin_group is the group ID of the admin group, as a negative number. realm_name is the name of your Libebot realm.

Once this is set up, put your bot in the admin group and run /add and /modhelp to get started.

Where the key is the preconfigured response (where #NAME will be replaced with the user's name or nickname) and the strings in the table are the expected greetings (followed by the bot's name and possible punctuation).

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##Setup You must have Lua (5.2+), LuaSocket, and LuaSec installed. For uploading photos and other files, you must have curl installed. The fortune.lua plugin requires that fortune is installed.

For weather.lua, lastfm.lua, and bible.lua to work, you must have API keys for OpenWeatherMap, last.fm, and Biblia.com, respectively. cats.lua uses an API key (via The Cat API) to get more results, though it is not required.

Before you do anything, open config.lua in a text editor and make the following changes:

• Set bot_api_key to the authentication token you received from the Botfather.

• Set admin as your Telegram ID.

You may also want to set your time_offset (a positive or negative number, in seconds, representing your computer's difference from UTC), your lang (lowercase, two-letter code representing your language), and modify your about_text. Some plugins will not be enabled by default, as they are for specific uses. If you want to use them, add them to the plugins table.

To start the bot, run ./launch.sh. To stop the bot, press Ctrl+c twice.

You may also start the bot with lua bot.lua, but then it will not restart automatically.

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##Development Everybody is free to contribute to otouto. Here I will explain various things that are important to know about the plugin system.

A plugin can have five components, and three of them are optional: action, triggers, doc, command, and cron.

Component	Description	Optional?
action	The main function of a plugin. It accepts the msg table.	No.
triggers	A table of strings which, when one is matched in a message's text, will cause action to be run.	No.
doc	The help text to be returned when a plugin is run with improper syntax or arguments.	Yes
command	The command with its syntax, without the slash. This is used to generate the help text.	Yes
cron	A function to be run every five seconds.	Yes

The on_msg_receive function adds a few variables to the "msg" table: msg.from.id_str, msg.to.id_str, msg.text_lower. These are self-explanatory and can make your code a lot neater.

Return values from the action function are optional, but when they are used, they determine the fate of the message. When false/nil is returned, on_msg_receive stops and the script moves on to waiting for the next message. When true is returned, on_msg_receive continues going through the plugins for a match. When a table is returned, that table becomes the "msg" table, and on_msg_receive continues.

When a plugin action or cron function fails, the script will catch the error and print it, and, if applicable, the text which triggered the plugin, and continue.

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Interactions with the Telegram bot API are straightforward. Every function is named the same as the API method it utilizes. The order of expected arguments is laid out in bindings.lua.

There are three functions which are not API methods: sendRequest, curlRequest, and sendReply. The first two are used by the other functions. sendReply is used directly. It expects the "msg" table as its first argument, and a string of text as its second. It will send a reply without image preview to the initial message.

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Several functions and methods used by multiple plugins and possibly the main script are kept in utilities.lua. Refer to that file for documentation.

otouto uses dkjson, a pure-Lua JSON parser. This is provided with the code and does not need to be downloaded or installed separately.

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##Contributors The creator and maintainer of otouto is topkecleon. He can be contacted via Telegram, Twitter, or email.

Other developers who have contributed to otouto are Juan Potato, Tiago Danin, Ender, and Iman Daneshi.