giantsd/plugins/greetings.py

class Greetings:
    def __init__(self, server):
        self.server = server

    async def on_player_join(self, player):
        await self.server.broadcast_message("Welcome "+player.name+"!")

    async def on_map_change(self, newmap):
        await self.server.broadcast_message("You are now playing on "+newmap.mapname)


def setup(server):
    plugin = Greetings(server)
    server.add_plugin(plugin)