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islands_engine
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Models the Game of Islands.
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lib/islands/engine/server.ex
defmodule Islands.Engine.Server do
@moduledoc false
use GenServer, restart: :transient
use PersistConfig
alias __MODULE__
alias Islands.Engine.Board.Memorizer
alias Islands.Engine.Server.{
AddPlayer,
Error,
GuessCoord,
Info,
PositionAllIslands,
PositionIsland,
SetIslands,
Stop
}
alias Islands.Engine.{Game, Tally}
@type from :: GenServer.from()
@type reply :: {:reply, Tally.t(), Game.t()}
@type request :: tuple
@type response :: tuple
@ets Application.get_env(@app, :ets_name)
# @reg Application.get_env(@app, :registry)
@spec start_link({String.t(), pid}) :: GenServer.on_start()
def start_link({player1_name, pid}) do
GenServer.start_link(Server, {player1_name, pid}, name: via(player1_name))
end
# @spec via(String.t()) :: {:via, module, {atom, tuple}}
# def via(player1_name), do: {:via, Registry, {@reg, key(player1_name)}}
@spec via(String.t()) :: {:global, tuple}
def via(player1_name), do: {:global, key(player1_name)}
@spec save(Game.t()) :: Game.t()
def save(game) do
:ok = Info.log(:save, game)
true = :ets.insert(@ets, {key(game.player1.name), game})
game
end
@spec reply(Game.t(), Game.player_id()) :: reply
def reply(game, player_id), do: {:reply, Tally.new(game, player_id), game}
## Private functions
@spec key(String.t()) :: tuple
defp key(player1_name), do: {Server, player1_name}
@spec game(String.t(), pid) :: Game.t()
defp game(player1_name, pid) do
case :ets.lookup(@ets, key(player1_name)) do
[] ->
player1_name
|> Game.new()
|> Game.update_player_pid(:player1, pid)
|> save()
[{_key, game}] ->
game
end
end
## Callbacks
@spec init({String.t(), pid}) :: {:ok, Game.t()}
def init({player1_name, pid}), do: {:ok, game(player1_name, pid)}
@spec handle_call(request, from, Game.t()) :: reply
def handle_call({:add_player, _, _} = request, from, game),
do: AddPlayer.handle_call(request, from, game)
def handle_call({:position_island, _, _, _, _} = request, from, game),
do: PositionIsland.handle_call(request, from, game)
def handle_call({:position_all_islands, _} = request, from, game),
do: PositionAllIslands.handle_call(request, from, game)
def handle_call({:stop, _} = request, from, game),
do: Stop.handle_call(request, from, game)
def handle_call({:set_islands, _} = request, from, game),
do: SetIslands.handle_call(request, from, game)
def handle_call({:guess_coord, _, _, _} = request, from, game),
do: GuessCoord.handle_call(request, from, game)
def handle_call({:tally, player_id}, _from, game), do: reply(game, player_id)
@spec handle_cast(term, Game.t()) :: {:noreply, Game.t()}
def handle_cast({:persist_board, board}, game) do
:ok = Memorizer.persist_board(board)
{:noreply, game}
end
@spec terminate(term, Game.t()) :: true
def terminate(:shutdown = reason, game) do
:ok = Info.log(:terminate, reason, game)
true = :ets.delete(@ets, key(game.player1.name))
end
def terminate(reason, game) do
:ok = Error.log(:terminate, reason, game)
true = :ets.delete(@ets, key(game.player1.name))
end
end