plugins/opdown.lua

local jid_bare = require "prosody.util.jid".bare;

function riddim.plugins.opdown(bot)

	local admin = bot.config.admin;

	-- To allow anyone other than the admin to use a command,

	-- simply add them to the table, like

	-- opdown_map = {

	--   op = { role = "moderator", "operator@host" }, -- operator is allowed to use !op

	--   "admin@host" -- allowed to use all commands

	-- }

	-- also, bot.config.admin is allowed to do anything

	local command_map = bot.config.opdown_map or {

		owner = { affiliation =       "owner" };

		admin = { affiliation =       "admin" };

		op    = { role        =   "moderator" };

		member= { affiliation =      "member" };

		down  = { role        = "participant",

		          affiliation =        "none" };

		--ban   = { affiliation =     "outcast" };

		--kick  = { role        =        "none" };

	}

	function opdown(command)

		if not command.room then

			return "This command is only available in groupchats.";

		end

		local what = command_map[command.command];

		if not what then return end

		local room = command.room;

		local who = command.param or command.sender.nick;

		local commander = command.sender;

		local actor = jid_bare(command.sender.real_jid);

		if not actor then

			return "I don't know who you really are?";

		end

		if actor ~= admin then

			local allow = false;

			for i = 1,#what do

				if what[i] == actor then

					allow = true;

					break;

				end

			end

			if not allow then

				for i = 1,#command_map do

					if command_map[i] == actor then

						allow = true;

						break;

					end

				end

			end

			if not allow then

				return "I can't let you do that!";

			end

		end

		if command.room.occupants[who] then

			if what.role then

				command.room:set_role(who, what.role, "As commanded");

			end

			if what.affiliation then

				command.room:set_affiliation(who, what.affiliation, "As commanded");

			end

		end

	end

	for k in pairs(command_map) do

		bot:hook("commands/" .. k, opdown);

	end

end