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game.lua
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game.lua
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--[[
mattata v2.0 - Game Plugin
Tic-tac-toe with inline keyboard buttons. Two players take turns.
Game state stored in Redis as JSON.
]]
local plugin = {}
plugin.name = 'game'
plugin.category = 'fun'
plugin.description = 'Play tic-tac-toe with another user'
plugin.commands = { 'game', 'tictactoe' }
plugin.help = '/game - Start a tic-tac-toe game. Another user clicks a cell to join as O.'
local json = require('dkjson')
local EMPTY = ' '
local X = 'X'
local O = 'O'
-- Symbols for display on buttons
local DISPLAY = {
[EMPTY] = '\xE2\xAC\x9C', -- white square
[X] = '\xE2\x9D\x8C', -- cross mark
[O] = '\xE2\xAD\x95', -- hollow circle
}
local function game_key(chat_id, message_id)
return 'ttt:' .. chat_id .. ':' .. message_id
end
local function new_board()
return {
EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY
}
end
local WIN_LINES = {
{1, 2, 3}, {4, 5, 6}, {7, 8, 9}, -- rows
{1, 4, 7}, {2, 5, 8}, {3, 6, 9}, -- columns
{1, 5, 9}, {3, 5, 7} -- diagonals
}
local function check_winner(board)
for _, line in ipairs(WIN_LINES) do
local a, b, c = board[line[1]], board[line[2]], board[line[3]]
if a ~= EMPTY and a == b and b == c then
return a
end
end
-- Check for draw
for _, cell in ipairs(board) do
if cell == EMPTY then
return nil -- game still in progress
end
end
return 'draw'
end
local function build_keyboard(api, board, game_over)
local keyboard = api.inline_keyboard()
for row = 0, 2 do
local r = api.row()
for col = 1, 3 do
local idx = row * 3 + col
local label = DISPLAY[board[idx]]
if game_over then
r:callback_data_button(label, 'game:noop')
else
r:callback_data_button(label, 'game:move:' .. idx)
end
end
keyboard:row(r)
end
return keyboard
end
local function format_status(game_state, winner)
local tools = require('telegram-bot-lua.tools')
local x_name = tools.escape_html(game_state.x_name or 'Player X')
local o_name = tools.escape_html(game_state.o_name or '???')
if winner == 'draw' then
return string.format(
'<b>Tic-Tac-Toe</b>\n%s %s vs %s %s\n\nIt\'s a draw!',
DISPLAY[X], x_name, DISPLAY[O], o_name
)
elseif winner == X then
return string.format(
'<b>Tic-Tac-Toe</b>\n%s %s vs %s %s\n\n%s %s wins!',
DISPLAY[X], x_name, DISPLAY[O], o_name, DISPLAY[X], x_name
)
elseif winner == O then
return string.format(
'<b>Tic-Tac-Toe</b>\n%s %s vs %s %s\n\n%s %s wins!',
DISPLAY[X], x_name, DISPLAY[O], o_name, DISPLAY[O], o_name
)
else
local turn_name = game_state.turn == X and x_name or o_name
local turn_symbol = DISPLAY[game_state.turn]
if not game_state.o_id then
return string.format(
'<b>Tic-Tac-Toe</b>\n%s %s vs %s ???\n\n%s is waiting for an opponent. Click a cell to join!',
DISPLAY[X], x_name, DISPLAY[O], x_name
)
end
return string.format(
'<b>Tic-Tac-Toe</b>\n%s %s vs %s %s\n\n%s %s\'s turn',
DISPLAY[X], x_name, DISPLAY[O], o_name, turn_symbol, turn_name
)
end
end
function plugin.on_message(api, message, ctx)
local board = new_board()
local game_state = {
board = board,
turn = X,
x_id = message.from.id,
x_name = message.from.first_name or 'Player X',
o_id = nil,
o_name = nil
}
local status = format_status(game_state, nil)
local keyboard = build_keyboard(api, board, false)
local result = api.send_message(message.chat.id, status, 'html', true, false, nil, keyboard)
if result and result.result and result.result.message_id then
local key = game_key(message.chat.id, result.result.message_id)
ctx.redis.setex(key, 3600, json.encode(game_state))
end
end
function plugin.on_callback_query(api, callback_query, message, ctx)
local data = callback_query.data
if data == 'noop' then
return api.answer_callback_query(callback_query.id)
end
local idx = tonumber(data:match('^move:(%d+)$'))
if not idx or idx < 1 or idx > 9 then
return api.answer_callback_query(callback_query.id, 'Invalid move.')
end
local key = game_key(message.chat.id, message.message_id)
local raw = ctx.redis.get(key)
if not raw then
return api.answer_callback_query(callback_query.id, 'This game has expired.')
end
local game_state, _ = json.decode(raw)
if not game_state then
return api.answer_callback_query(callback_query.id, 'Failed to load game state.')
end
local user_id = callback_query.from.id
local user_name = callback_query.from.first_name or 'Unknown'
-- If no opponent yet, the first person who clicks (that isn't X) becomes O
if not game_state.o_id then
if user_id == game_state.x_id then
return api.answer_callback_query(callback_query.id, 'Waiting for an opponent to join. Another user must click a cell.')
end
game_state.o_id = user_id
game_state.o_name = user_name
end
-- Check it's this user's turn
local expected_id = game_state.turn == X and game_state.x_id or game_state.o_id
if user_id ~= expected_id then
if user_id ~= game_state.x_id and user_id ~= game_state.o_id then
return api.answer_callback_query(callback_query.id, 'You are not a player in this game.')
end
return api.answer_callback_query(callback_query.id, 'It\'s not your turn.')
end
-- Check cell is empty
if game_state.board[idx] ~= EMPTY then
return api.answer_callback_query(callback_query.id, 'That cell is already taken.')
end
-- Make the move
game_state.board[idx] = game_state.turn
local winner = check_winner(game_state.board)
if winner then
-- Game over
local status = format_status(game_state, winner)
local keyboard = build_keyboard(api, game_state.board, true)
ctx.redis.del(key)
api.answer_callback_query(callback_query.id)
return api.edit_message_text(message.chat.id, message.message_id, status, 'html', true, keyboard)
end
-- Switch turns
game_state.turn = game_state.turn == X and O or X
local status = format_status(game_state, nil)
local keyboard = build_keyboard(api, game_state.board, false)
ctx.redis.setex(key, 3600, json.encode(game_state))
api.answer_callback_query(callback_query.id)
return api.edit_message_text(message.chat.id, message.message_id, status, 'html', true, keyboard)
end
return plugin

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