Add basic functionality

init.lua

+local version = "0.1.0"
+local modpath = minetest.get_modpath("magic_stats")
+local srcpath = modpath .. "/src"
+
+magic_stats = {}
+
+dofile(srcpath .. "/game.lua")
+dofile(srcpath .. "/utils.lua")
+dofile(srcpath .. "/commands.lua")

mod.conf

+name = magic_stats
+description = Library to handle player statistics in minigames
+depends = lib_chatcmdbuilder

src/commands.lua

+local stats_cmd = chatcmdbuilder.register("stats", {
+	description = "Show game statistics for yourself or another player. /stats <game> [player]",
+})
+
+stats_cmd:sub(":game", function(name, gamename)
+	local game = magic_stats.get_game_by_name(gamename)
+	if not game then
+		return false, "A game with the name " .. gamename .. " does not exist."
+	end
+	return game:get_stats(name)
+end)
+
+stats_cmd:sub(":game :target", function(name, gamename, target)
+	local game = magic_stats.get_game_by_name(gamename)
+	if not game then
+		return false, "A game with the name " .. gamename .. " does not exist."
+	end
+	return game:get_stats(target)
+end)

src/game.lua

+local storage = minetest.get_mod_storage()
+
+local games = {}
+
+local Game = {}
+
+function Game.get_stat(self, player, category)
+	return storage:get_int("STATS." .. self.mod.. "." .. player .. "." .. category)
+end
+
+function Game.set_stat(self, player, category, value)
+	storage:set_int("STATS." .. self.mod .. "." .. player .. "." .. category, value)
+end
+
+function Game.increment_stat(self, player, category, difference)
+	local current = self:get_stat(player, category)
+	if current == nil then
+		current = 0
+	end
+	self:set_stat(player, category, current + difference)
+end
+
+function Game.get_stats(self, target)
+	local output = self.display_name .. " statistics of " .. target
+	for i, category in ipairs(self.categories) do
+		output = output .. "\n" .. category .. ": " .. self:get_stat(target, category)
+	end
+	return true, output
+end
+
+function Game.register(mod, name, display_name, categories)
+	local game = {
+		mod = mod,
+		name = name,
+		display_name = display_name,
+		categories = categories,
+		get_stat = Game.get_stat,
+		set_stat = Game.set_stat,
+		increment_stat = Game.increment_stat,
+		get_stats = Game.get_stats,
+	}
+	games[mod] = game
+	return game
+end
+
+magic_stats.games = games
+magic_stats.Game = Game

src/utils.lua

+function magic_stats.get_game_by_mod(mod)
+	return magic_stats.games[mod]
+end
+
+function magic_stats.get_game_by_name(name)
+	for mod, game in pairs(magic_stats.games) do
+		if game.name == name then
+			return game
+		end
+	end
+end